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* Not for trading, but only in connection with the listing on the Nasdaq Global Select Market of the American depositary shares.

Indicate the number of outstanding shares of each of the issuer’s classes of capital or ordinary shares as of the close of the period covered by the annual report.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. ☐ Yes ☒ No

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. ☐ Yes ☒ No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

☒ Yes ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

† The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If the securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant in the filing reflect the correction of an error to previously filed financial statements. ☐

Indicate by checkmark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow. ☐ Item 17 ☐ Item 18

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No

Unless the context requires otherwise, references in this Annual Report on Form 20-F to the “Company,” “Molecular Partners,” “we,” “us” and “our” refer to Molecular Partners AG and its wholly-owned subsidiary.

We own trademark registrations for “Molecular Partners®” and “DARPin®” in Switzerland, the European Union, the United States and Japan. All other trade names, trademarks and service marks of other companies appearing in this Annual Report on Form 20-F are the property of their respective holders. Solely for convenience, the trademarks and trade names in this Annual Report on Form 20-F may be referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend to use or display other companies’ trademarks and trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

We present our consolidated financial statements in CHF and in accordance with IFRS® Accounting Standards ("IFRS") as issued by the International Accounting and Standards Board. None of the financial statements were prepared in accordance with generally accepted accounting principles in the United States.

The terms “dollar,” “USD” or “$” refer to U.S. dollars and the terms “Swiss Francs” or “CHF” refer to the legal currency of Switzerland. Unless otherwise indicated, all references to currency amounts in this Annual Report on Form 20-F are in U.S. dollars.

We have made rounding adjustments to some of the figures included in this Annual Report on Form 20-F. Accordingly, numerical figures shown as totals in some tables may not be an arithmetic aggregation of the figures that preceded them.

This Annual Report on Form 20-F contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, that are based on our management’s beliefs and assumptions and on information currently available to our management. All statements other than present and historical facts and conditions contained in this Annual Report on Form 20-F, including statements regarding our future results of operations and financial positions, business strategy, plans and our objectives for future operations, are forward-looking statements. When used in this Annual Report on Form 20-F, the words “anticipate,” “believe,” “can,” “could,” “estimate,” “expect,” “intend,” “designed,” “may,” “might,” “plan,” “potential,” “predict,” “objective,” “should,” or the negative of these and similar expressions identify forward-looking statements. Forward-looking statements include, but are not limited to, statements about:

•the initiation, timing, progress and results of our clinical trials and preclinical studies, and our research and development programs;

•our ability to advance product candidates into, and successfully complete, clinical trials;

•the timing of regulatory filings and the likelihood of favorable regulatory outcomes and approvals;

•the regulatory treatment of our product candidates;

•regulatory developments in the European Union, United States and other countries;

•the commercialization of our product candidates, if and once approved;

•the pricing and reimbursement of our product candidates, if and once approved;

•our ability to contract on commercially reasonable terms with third-party suppliers and manufacturers;

•the implementation of our business model and strategy and the development of our product candidates and platforms;

•the scope of protection we are able to establish, obtain and maintain for intellectual property rights covering our product candidates and technology and our ability to protect and enforce such rights;

•our ability to operate our business without infringing on, misappropriating or otherwise violating the intellectual property rights of others;

•the ability of third parties with whom we contract to successfully conduct, supervise and monitor clinical trials for our product candidates;

•estimates of our expenses, future revenues, earnings, capital requirements and our needs for additional financing;

•the timing and amount of milestone and royalty payments that we may receive under our strategic collaboration agreements;

•our ability to obtain additional funding for our operations;

•the potential benefits of our strategic collaboration agreements and our ability to enter into future strategic arrangements;

•our ability to maintain and establish collaborations or obtain additional funding;

•the rate and degree of market acceptance of, and pricing for, our product candidates;

•our financial performance;

•the impact of macro-economic factors, including a health pandemic, rising inflation, the U.S Federal Reserve and other financial regulatory agencies raising interest rates, the Russia-Ukraine war and the Israel-Hamas war, on our business, operations and prospects and on our clinical trials;

•our ability to attract and retain key scientific and management personnel;

•developments relating to our competitors and our industry, including competing therapies;

•the future trading price of the ADSs and impact of securities analysts reports on these prices; and

•other risks and uncertainties, including those listed under the caption “Risk Factors.”

You should refer to the section of this Annual Report on Form 20-F titled “Item 3.D-Risk Factors” for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this Annual Report on Form 20-F will prove to be accurate. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material.

In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

You should read this Annual Report on Form 20-F and the documents that we reference in this Annual Report on Form 20-F and have filed as exhibits to this Annual Report on Form 20-F completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this Annual Report on Form 20-F, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete. Our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.

This Annual Report on Form 20-F contains market data and industry forecasts that were obtained from industry publications. These data involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates. We have not independently verified any third-party information. While we believe the market position, market opportunity and market size information included in this Annual Report on Form 20-F is generally reliable, such information is inherently imprecise.

Our business faces significant risks. If any of the following risks are realized, our business, financial condition and results of operations could be materially and adversely affected. You should carefully review and consider the full discussion of our risk factors set forth under the caption “Risk Factors” in Item 3.D. in Part I of this Annual Report on Form 20-F. An investment in our ADSs involves a high degree of risk. Any of the factors set forth under “Risk Factors” may limit our ability to successfully execute our business strategy. You should carefully consider all of the information set forth in this Annual Report on Form 20-F and, in particular, should evaluate the specific factors set forth under “Risk Factors” in deciding whether to invest in our securities. Among these risks are the following:

•We have incurred significant losses since our inception, we expect to incur losses in future periods and may not achieve profitability in the upcoming years. We may need substantial additional funding in order to complete the development and commercialization of our product candidates. Failure to obtain this necessary capital when needed may force us to delay, limit or terminate certain of our product development or research operations.

•We may need substantial additional funding in order to complete the development and commercialization of our product candidates. Failure to obtain this necessary capital when needed may force us to delay, limit or terminate certain of our product development or research operations.

•Raising additional capital may cause dilution to holders of our ordinary shares or ADSs, and an inability to raise capital may restrict our operations or require us to relinquish rights to our technologies or product candidates.

•We are heavily dependent on the success of our DARPin platform to identify and develop product candidates. If we or our collaborators are unable to successfully develop and commercialize product candidates based on our platform or experience significant delays in doing so, our business may be harmed.

•All of our product candidates are in preclinical or various stages of clinical development. Clinical drug development is a lengthy and expensive process with uncertain timelines and uncertain outcomes. If clinical trials of our product candidates, particularly MP0317, MP0533 and product candidates that we have licensed to our partners are prolonged, delayed or not commercially viable, we or our collaborators may be unable to obtain required regulatory approvals, and therefore may be unable to commercialize our product candidates on a timely basis or at all, which will adversely affect our business.

•Preclinical drug development is uncertain. Some or all of our preclinical programs may experience delays or may never advance to clinical trials, which would adversely affect our ability to obtain regulatory approvals or commercialize these product candidates on a timely basis or at all, which would have an adverse effect on our business.

•Positive results from early preclinical studies of our product candidates would not necessarily be predictive of the results of later preclinical studies and any ongoing or future clinical trials of our product candidates. If we were to achieve positive results from preclinical studies, but were unable to then replicate those positive results in our later preclinical studies and ongoing or future clinical trials, we might be unable to successfully develop, obtain regulatory or marketing approval and commercialize our product candidates.

•Interim, topline and preliminary data from our clinical trials that we announce or publish may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data.

•Because the number of patients in certain of our clinical trials may be small, the results from such trials may be less reliable than results achieve in larger clinical trials.

•If any of our product candidates has negative side effects, public perception of our DARPin platform and commercial opportunities for all of our current and future product candidates could be adversely affected.

•We face significant competition for our drug discovery and development efforts, and if we do not compete effectively, our commercial opportunities will be reduced or eliminated.

•Our financial prospects are dependent upon the research, manufacture, development and marketing efforts of our licensees. Our licensees may act in their best interest rather than in our best interest, which could materially adversely affect our business, financial condition and results of operations.

•We rely on patents and other intellectual property rights to protect our product candidates and the DARPin technology, the prosecution, grant, enforcement, defense and maintenance of which may be challenging and costly. Failure to obtain, maintain, enforce or protect these rights adequately could harm our ability to compete and impair our business.

•Third parties may initiate legal proceedings alleging that we are infringing, misappropriating, or otherwise violating their intellectual property rights, the outcome of which would be uncertain and could have a material adverse effect on the success of our business. Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities and negative outcomes could result in adverse effects on our business.

•The base patents relating to the DARPin base technology we use to generate our DARPin product candidates has expired, and our competitors may use the technology claimed in such patents, which may materially adversely affect our business and competitive position.

•Certain significant shareholders own a substantial number of our securities and as a result, may be able to exercise significant influence over the outcome of shareholder votes. These shareholders may have different interests from us or your interests.

•We depend on our information technology systems, and any failure of these systems could harm our business. Security incidents and other disruptions could compromise sensitive information related to our business or prevent us from accessing critical information and expose us to liability, which could adversely affect our business, results of operations and financial condition.

Since our inception, we have incurred significant operating losses, including negative net results, attributable to shareholders. As of December 31, 2023, we had cumulative losses of CHF 191.8 million. For the year ended December 31, 2023 we recorded negative net result, attributable to shareholders of CHF 62.0 million and for the year ended December 31, 2022, we incurred positive net result, attributable to shareholders of CHF 117.9 million. The positive result in 2022 was largely driven by the January 2022 payment of CHF 150 million by Novartis Pharma AG, or Novartis, following exercise of its option under a collaboration agreement with us.

Our historical losses resulted principally from costs incurred in research and development, preclinical testing, clinical development of our product candidates as well as costs incurred for research programs and from selling, general and administrative costs associated with our operations. In the future, we intend to continue to conduct research and development, preclinical testing, clinical trials and regulatory compliance activities that, together with anticipated selling, general and administrative expenses, may result in incurring losses in future periods. Our losses, among other things, will continue to cause our working capital and shareholders' equity to decrease. We anticipate that our expenses will increase substantially if and as we:

•complete the Phase 1 clinical trial and potentially initiate a new clinical trial of MP0317 (in combination with other therapies), one of our product candidates in our oncology program;

•continue to prepare for and complete and potentially expand the Phase 1 clinical trial of MP0533, our CD3 T-cell engaging candidate against acute myeloid leukemia or AML;

•seek to enhance our Designed Ankyrin Repeat Protein, or DARPin, technology and build on our proprietary product pipeline;

•continue our research activities for developing suitable candidates within the Radio DARPin Therapy, or RDT, space, such as the DLL3 program in collaboration with Orano Med SAS, a subsidiary of Orano SA, or Orano Med;

•continue the research and development of our other clinical- and preclinical-stage product candidates and discovery stage programs including within the radioligand therapeutic space;

•continue the research and development of our other product candidates;

•seek regulatory approvals for any product candidates that successfully complete clinical trials;

•establish a sales, marketing and distribution infrastructure and scale-up manufacturing capabilities to commercialize any product candidates for which we may obtain regulatory approval;

•obtain, maintain, expand, protect and enforce our intellectual property and other proprietary rights and obtain licenses to third-party intellectual property;

•add clinical, regulatory, scientific, operational, financial, legal, intellectual property, compliance and management information systems and personnel, including personnel to support our product development and potential future commercialization efforts; and

•experience any delays or encounter any issues relating to any of the above, including failed studies, ambiguous trial results, safety issues, other regulatory challenges or third party supply or manufacturing issues.

Since our inception in 2004, we have invested most of our resources in developing our product candidates, building our intellectual property portfolio, developing our supply chain, conducting business planning, raising capital and providing general and administrative support for these operations. We do not currently have any approved products and have never generated any revenue from product sales.

To become profitable, we must succeed in developing and eventually commercializing products that generate significant revenue. This will require us or our licensees to be successful in a range of challenging activities, including completing preclinical testing and clinical trials of our product candidates, discovering and developing additional product candidates, obtaining regulatory approval for any product candidates that successfully complete clinical trials, establishing manufacturing and marketing capabilities and ultimately selling any products for which we may obtain regulatory approval. We are only in the preliminary stages of most of these activities. We may never succeed in these activities and, even if we do, may never generate revenue that is significant enough to sustain or increase profitability on a quarterly or annual basis. Our failure to become profitable would decrease the value of our company and could impair our ability to raise capital, maintain our research and development efforts, expand our business or continue our operations.

If we are required by the U.S. Food and Drug Administration, or FDA, the European Medicines Agency, or EMA, or other comparable foreign authorities to perform studies in addition to those we currently anticipate, or if there are any delays in completing our clinical trials or the development of any of our product candidates, our expenses could increase and revenue could be further delayed.

Even if we do generate product royalties or product sales, we may never sustain profitability on a quarterly or annual basis. Our failure to sustain profitability would depress the market price of the ADSs and could impair our ability to raise capital, expand our business, diversify our product offerings or continue our operations. A decline in the market price of the ADSs also could cause you to lose all or a part of your investment.

To date, we have funded our operations through public and private placements of equity securities, upfront, milestone, option exercise, reservation fee, expense reimbursement, sponsored research payments received from our collaborators, recharging of third party costs and interest income from the investment of our cash, cash equivalents and financial assets. We expect to require additional funding in the future to sufficiently finance our operations and advance development of our product candidates. On July 1, 2022, we entered into a sales agreement with Leerink Partners LLC (previously known as SVB Securities LLC), or the Sales Agreement, to sell ordinary shares from time to time at our discretion under an “at the market” program, with aggregate gross sales proceeds of up to $100.0 million.

We expect that our existing cash, cash equivalents, together with anticipated funding through collaborations, will enable us to fund our operating expenses and capital expenditure requirements well into 2026. We have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect. Our future capital requirements for MP0317 and MP0533 or our preclinical programs will depend on many factors, including:

•the progress, timing and completion of preclinical testing and clinical trials for our current or any future product candidates;

•the number of potential new product candidates we identify and decide to develop;

•the costs involved in growing our organization to the size needed to allow for the research, development and potential commercialization of our current or any future product candidates;

•the costs involved in filing patent applications, maintaining and enforcing patents or defending against infringement, misappropriation or other claims raised by third parties;

•the maintenance of our existing license and collaboration agreements and the entry into new license and collaboration agreements;

•the time and costs involved in obtaining regulatory approval for our product candidates and any delays we may encounter as a result of evolving regulatory requirements or adverse results with respect to any of our product candidates;

•selling and marketing activities undertaken in connection with the potential commercialization of our current or any future product candidates, if approved, and costs involved in the creation of an effective sales and marketing organization; and

•the amount of revenues, if any, we may derive either directly or in the form of milestone and royalty payments from future sales of our product candidates, if approved.

Our ability to raise additional funds will depend on financial, economic and market conditions and other factors, over which we may have no or limited control. Further, as a Swiss corporation, we have less flexibility to raise capital than U.S. companies, particularly in a quick and efficient manner. As a result, we may not be able to access the capital markets as frequently as comparable U.S. companies. See the Risk Factor entitled “Our status as a Swiss corporation means that our shareholders enjoy certain rights that may limit our flexibility to raise capital, issue dividends and otherwise manage ongoing capital needs” for additional information related to our ability to timely raise capital. If adequate funds are not available on commercially acceptable terms or at all when needed, we may be forced to delay, reduce or terminate the development or commercialization of all or part of our research programs or product candidates or we may be unable to take advantage of future business opportunities.

Our business could be adversely affected by health epidemics in regions where we have concentrations of clinical trial sites or other business operations, and could cause significant disruption in the operations of third party manufacturers and contract research organizations, or CROs, upon whom we rely.

As a result of a pandemic, we may experience disruptions that could impact our business, preclinical studies and clinical trials, including:

•delay of submissions to, and approvals of, regulatory authorities;

•interruption or delays in the operations of regulatory authorities, which may impact review and approval timelines, including delays in receiving approval from local regulatory authorities to initiate our planned clinical trials;

•interruption of, or delays in receiving, supplies of our product candidates or target material from our contract manufacturing organizations, or CMOs, and other suppliers due to staffing shortages, shortages in supply of production materials, production slowdowns or stoppages and disruptions in delivery systems;

•interruptions in preclinical studies due to restricted or limited operations at our facilities; limitations on employee resources that would otherwise be focused on the conduct of our preclinical studies and clinical trials, including because of sickness of employees or their families or the desire of employees to avoid contact with large groups of people; and

•interruption or delays to our sourced discovery and clinical activities.

The extent to which any future health epidemic outbreaks of contagious disease ultimately impacts our business, preclinical studies and clinical trials will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the pandemic, the emergence of variants, the transition to endemic status, travel restrictions and social distancing in Switzerland, the United States and other countries, business closures or business disruptions and the effectiveness of actions taken in countries around the world to contain and treat the disease.

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our operations with our existing cash, cash equivalents and current financial assets, proceeds from debt or equity offerings, revenue from our collaborations and interest income from the investment of our cash, cash equivalents and financial assets. In order to further advance the development of our product candidates, discover additional product candidates and pursue our other business objectives, however, we will need to seek additional funds.

We cannot guarantee that future financing will be available in sufficient amounts or on commercially reasonable terms, if at all. Moreover, the terms of any financing may adversely affect the holdings or the rights of holders of our ordinary shares or ADSs and the issuance of additional securities, whether equity or debt, by us, or the possibility of such issuance, may cause the market price of our ADSs and our ordinary shares to decline. The sale of additional equity or convertible securities would dilute all of our existing shareholders and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our shareholders. The incurrence of indebtedness could result in increased fixed payment obligations and we may be required to agree to certain restrictive covenants, such as limitations on our ability to incur additional debt, limitations on our ability to acquire, sell or license intellectual property rights and other operating restrictions that could adversely impact our ability to conduct our business. We could also be required to seek funds through arrangements with collaborators or others at an earlier stage than otherwise would be desirable and we may be required to relinquish rights to some of our technologies or product candidates or otherwise agree to terms unfavorable to us, any of which may have a material adverse effect on our business, operating results and prospects. Further, any additional fundraising efforts may divert our management from its day-to-day activities, which may adversely affect our ability to develop and commercialize our product candidates.

If we are unable to obtain funding on a timely basis, we may be required to significantly curtail, delay or discontinue one or more of our research or development programs or the commercialization of any of our product candidates, or be unable to expand our operations or otherwise capitalize on our business opportunities, as desired, which could materially affect our business, financial condition and results of operations.

We are heavily dependent on the success of our DARPin platform technology and the product candidates currently in our core programs. Our commercial prospects will be heavily dependent on product candidates identified and developed using our DARPin platform. To date, we have invested substantially all of our efforts and financial resources to identify, acquire intellectual property for, and develop our DARPin platform technology and our programs, including conducting preclinical studies and early-stage clinical trials, and providing general and administrative support for these operations.

We may not be successful in our efforts to further develop our DARPin platform technology and current product candidates. We are not permitted to market or promote any of our product candidates before we receive regulatory approval from the FDA, European Commission (granted on the basis of a positive opinion from the Committee for Medicinal Products for Human Use of the European Medicines Agency, or EMA and commonly referred to as EMA approval) or comparable foreign regulatory authorities, and we may never receive such regulatory approval for any of our product candidates. Each of our product candidates will require significant additional clinical development, management of preclinical, clinical, and manufacturing activities, regulatory approval, adequate manufacturing supply, a commercial organization, and significant marketing efforts before we generate any revenue from product sales, if at all.

To obtain the requisite regulatory approvals to market and sell any of our product candidates, we or our collaborators for such candidates must demonstrate through extensive preclinical studies and clinical trials that our products are safe, pure and potent or effective in humans. Further, the process of obtaining regulatory approval is expensive, often takes many years following the commencement of clinical trials and can vary substantially based upon the type, complexity and novelty of the product candidates involved, as well as the target indications and patient population. Prior to obtaining approval to commercialize a product candidate in the United States or in other countries, we or our potential future collaborators must demonstrate with substantial evidence from adequate and well-controlled clinical trials, and to the satisfaction of the FDA or comparable foreign regulatory authorities, that such product candidates are safe and effective for their intended uses. Additionally, clinical testing is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the clinical trial process and our future clinical trial results may not be successful.

We may experience delays in our ongoing clinical trials and we do not know whether planned clinical trials will begin on time, need to be redesigned, enroll patients on time or be completed on schedule, if at all.

Clinical trials can be delayed, suspended, or terminated for a variety of reasons, including the following:

•delays in or failure to obtain regulatory approval to commence a trial;

•delays in or failure to reach agreement on acceptable terms with prospective CROs and clinical trial sites, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial sites;

•delays in or failure to obtain institutional review board, or IRB, or ethics committee approval at each site;

•delays in or failure to recruit suitable patients to participate in a trial;

•failure to have patients complete a trial or return for post-treatment follow-up;

•clinical sites deviating from trial protocol or dropping out of a trial;

•adding new clinical trial sites;

•manufacturing sufficient quantities of product candidate for use in clinical trials;

•third-party actions claiming infringement by our product candidates in clinical trials and obtaining injunctions interfering with our progress;

•safety or tolerability concerns could cause us or our collaborators, as applicable, to suspend or terminate a trial if we or our collaborators find that the participants are being exposed to unacceptable health risks;

•changes in regulatory requirements, policies and guidelines;

•lower than anticipated retention rates of patients and volunteers in clinical trials;

•our third-party research contractors failing to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;

•delays in establishing the appropriate dosage levels in clinical trials;

•the difficulty in certain countries in identifying the sub-populations that we are trying to treat in a particular trial, which may delay enrollment and reduce the power of a clinical trial to detect statistically significant results; and

•the quality or stability of the product candidate falling below acceptable standards.

We could encounter delays if a clinical trial is suspended or terminated by us, by the IRBs of the institutions in which such trials are being conducted or ethics committees, by the Data Review Committee, or DRC, or Data Safety Monitoring Board, or DSMB, for such trial or by the EMA, the FDA or other regulatory authorities. Such authorities may impose such a suspension or termination due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols, inspection of the clinical trial operations or trial site by the EMA, the FDA or other regulatory authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, including those relating to the class to which our product candidates belong, failure to demonstrate a benefit from using a drug, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial. For example, we have faced and may face in the future bioburden during drug substance production campaigns or particles in drug product preparations at our CMOs which led or may lead to regulatory actions, including from the FDA. While we and our partners endeavor to maintain appropriate backup supply with respect to our product candidates, and not all such bioburden or particles result in regulatory action or delays, we cannot assure that any such issues would not result in delays in our clinical trials or product development or other adverse impacts on our business.

If we experience delays in the completion of, or termination of, any clinical trial of our product candidates, the commercial prospects of our product candidates will be harmed. In addition, any delays in completing our clinical trials will increase our costs, slow down our product candidate development and approval process and jeopardize our ability to commence product sales and generate revenues. Significant clinical trial delays could also allow our competitors to bring products to market before we do or shorten any periods during which we have the exclusive right to commercialize our product candidates and impair our ability to commercialize our product candidates and may harm our business and results of operations. Any of these occurrences may harm our business, financial condition and prospects significantly. In addition, many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates or result in the development of our product candidates being stopped early.

Clinical trials must be conducted in accordance with the FDA, the EMA and other applicable regulatory authorities' legal requirements and regulations, and are subject to oversight by these governmental agencies, IRBs at the medical institutions where the clinical trials are conducted or ethics committees. In addition, clinical trials must be conducted with supplies of our product candidates produced under cGMP requirements and other regulations. Furthermore, we rely on CROs and clinical trial sites to ensure the proper and timely conduct of our clinical trials and while we have agreements governing their committed activities, we have limited influence over their actual performance. We depend on our collaborators and on medical institutions and CROs to conduct our clinical trials in compliance with GCP requirements. To the extent our collaborators or the CROs or investigators fail to enroll participants for our clinical trials, fail to conduct the study to GCP standards or are delayed for a significant time in the execution of trials, including achieving full enrollment, we may be affected by increased costs, program delays or both, which may harm our business.

Further, conducting clinical trials in multiple countries presents additional risks that may delay completion of our clinical trials. These risks include the failure of enrolled patients in foreign countries to adhere to clinical protocol as a result of differences in healthcare services or cultural customs, managing additional administrative burdens associated with adhering to GCP, regulations and other foreign regulatory schemes, as well as political and economic risks relevant to such foreign countries.

In addition, future clinical trials that could be conducted in countries outside Switzerland, the European Union and the United States may subject us to further delays and expenses as a result of increased shipment costs, additional regulatory requirements and the engagement of non-European Union and non-U.S. CROs, as well as expose us to risks associated with clinical investigators who are unknown to the FDA or the EMA, and different standards of diagnosis, screening and medical care.

A key element of our strategy is to use and expand our platform to build a pipeline of product candidates and progress these product candidates through clinical development. So far none of the product candidates originating from our platform has received marketing approval from the FDA or other regulatory authorities. The scientific discoveries that form the basis for our efforts to discover and develop targeted oncology therapeutic candidates for cancer patients are relatively new. The scientific evidence to support the feasibility of developing product candidates based on these discoveries is both preliminary and limited. There can be no assurance that any development problems we may experience in the future related to our platform will not cause significant delays or unanticipated costs or that such development problems can be solved. Even if we are successful in building our pipeline of product candidates, the potential product candidates that we identify may not be suitable for clinical development or generate acceptable clinical data, including as a result of being shown to have characteristics that indicate that they are unlikely to be products that will receive marketing approval from the FDA or other regulatory authorities or achieve market acceptance.

In order to obtain FDA or EMA approval to market a new pharmaceutical or biological product we must demonstrate proof of safety, purity and potency or efficacy in humans. To meet these requirements we will have to conduct adequate and well-controlled clinical trials. Before we can commence clinical trials for a product candidate, we must complete extensive preclinical testing and studies that support our planned Investigational New Drug application, or IND, in the United States, or a Clinical Trial Authorization Application, or CTA, in Europe. We cannot be certain of the timely completion or outcome of our preclinical testing and studies and cannot predict if the FDA or EMA will accept our proposed clinical programs or if the outcome of our preclinical testing and studies will ultimately support the further development of these product candidates. Thus, we cannot be sure that we will be able to submit INDs or CTAs for our preclinical programs on the timelines we expect, if at all, and we cannot be sure that submission of INDs or CTAs will result in the FDA or EMA allowing clinical trials to begin.

Conducting preclinical testing is a lengthy, time-consuming and expensive process. The length of time may vary substantially according to the type, complexity, novelty and intended use of the product candidate, and often can be several years or more per product candidate. Delays associated with product candidates for which we are directly conducting preclinical testing and studies may cause us to incur additional operating expenses. We may encounter similar or different safety issues in this trial or our other clinical trials in the future. Moreover, we may continue to be affected by delays associated with the preclinical testing and studies of certain product candidates conducted by our potential partners over which we have no control. The commencement and rate of completion of preclinical studies and studies for a product candidate may be delayed by many factors, including, for example:

•the inability to generate sufficient preclinical or other in vivo or in vitro data to support the initiation of clinical studies;

•delays in reaching a consensus with regulatory agencies on study design; and

•the FDA or EMA not allowing us to rely on previous findings of safety and efficacy for other similar but approved products and published scientific literature.

Moreover, even if clinical trials do begin for our preclinical programs, our development efforts may not be successful, and clinical trials that we conduct or that third parties conduct on our behalf may not demonstrate sufficient safety, purity and potency or efficacy to obtain the requisite regulatory approvals for any of our product candidates or product candidates employing our technology.

Any positive results from our preclinical studies of our product candidates may not necessarily be predictive of the results from required later preclinical studies and clinical trials, and there can be no assurance that any of our clinical trials will ultimately be successful or support further clinical development of any of our product candidates.

For example, even if biological activity in patient samples following administration of initial doses is observed in our clinical trials, there can be no assurance that such biological activity will be similarly observed and maintained following administration of additional doses or any drop in biological activity could be overcome with additional development regarding more frequent dosing regimens. Similarly, even if we are able to complete our planned preclinical studies or any future clinical trials of our product candidates according to our current development timeline, the positive results from such preclinical studies and clinical trials of our product candidates may not be replicated in subsequent preclinical studies or clinical trial results. In addition, positive results in later stage clinical trials of one of our product candidates in an indication may not be predictive of the safety or efficacy of our other product candidates in other indications, even if they employ a similar mechanism of action.

Many companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in late-stage clinical trials after achieving positive results in early-stage development and we cannot be certain that we will not face similar setbacks. For example, our therapeutics in oncology, ophthalmology and virology has in the past and may in the future result in the creation of anti-drug antibodies that can neutralize the effects of the therapeutic, require that higher doses be used to obtain a therapeutic effect or cause adverse events. Whether anti-drug antibodies will be created and how they react can often not be predicted from nonclinical or even clinical studies, and their detection or appearance can be delayed. These setbacks have been caused by, among other things, preclinical and other nonclinical findings made while clinical trials were underway, or safety or efficacy observations made in preclinical studies and clinical trials, including previously unreported adverse events. Moreover, preclinical, nonclinical and clinical data are often susceptible to varying interpretations and analyses and many companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials nonetheless failed to obtain FDA or EMA approval.

Some of our product candidates, such as MP0317 and MP0533, the lead product candidates from our oncology program, and also the potential future RDT product candidates, utilize novel mechanisms of action which may result in greater research and development expenses, regulatory and development or CMC and supply chain issues that could delay or prevent approval, or discovery of unknown or unanticipated adverse effects. Regulatory approval of novel product candidates such as ours can be more expensive, riskier and take longer than for other, more well-known or extensively studied pharmaceutical or biopharmaceutical product candidates due to our and regulatory agencies’ lack of experience with the novel mechanisms of action. The novelty of our mechanism of action may lengthen the regulatory review process, require us to conduct additional studies or clinical trials, increase our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and commercialization of our product candidates or lead to significant post-approval limitations or restrictions. The novel mechanisms of action also means that fewer people are trained in or experienced with product candidates of such type, which may make it more difficult to find, hire and retain personnel for research, development and manufacturing positions. Any such events could adversely impact our business prospects, financial condition and results of operations.

As one of the key elements of our clinical development strategy, we seek to identify patient subsets within a disease category who may derive selective and meaningful benefit from the product candidates we are developing.

In collaboration with partners, we may develop companion diagnostics to help us to more accurately identify patients within a particular subset, both during our clinical trials and in connection with the commercialization of our product candidates.

Companion diagnostics are subject to regulation by the FDA and comparable foreign regulatory authorities as medical devices and require separate regulatory approval prior to commercialization. The FDA generally expects contemporaneous regulatory approvals of the companion diagnostic and the therapeutic product. We do not develop companion diagnostics internally and thus we are dependent on the sustained cooperation and effort of third-party collaborators in developing and obtaining regulatory approval for these companion diagnostics. We and our collaborators may encounter difficulties in developing and obtaining approval for the companion diagnostics, including issues relating to selectivity/specificity, analytical validation, reproducibility or clinical validation. Any delay or failure by our collaborators to develop or obtain regulatory approval of the companion diagnostics could delay or prevent approval of our product candidates.

In addition, our collaborators may encounter production difficulties that could constrain the supply of the companion diagnostics, and both they and we may have difficulties gaining acceptance of the use of the companion diagnostics in the clinical community. If such companion diagnostics fail to gain market acceptance, it would have an adverse effect on our ability to derive revenues from sales of our products. In addition, the diagnostic company with whom we contract may decide to discontinue selling or manufacturing the companion diagnostic that we anticipate using in connection with development and commercialization of our product candidates or our relationship with such diagnostic company may otherwise terminate.

We may not be able to enter into arrangements with another diagnostic company to obtain supplies of an alternative diagnostic test for use in connection with the development and commercialization of our product candidates or do so on commercially reasonable terms, which could adversely affect and/or delay the development or commercialization of our product candidates.

From time to time, we may publish interim, topline or preliminary data from our clinical trials. Preliminary and interim data from our clinical trials may change as more patient data become available. Preliminary or interim data from our clinical trials are not necessarily predictive of final results. Preliminary and interim data are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues, more patient data become available and we issue our final clinical trial report. Interim, topline and preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the preliminary data we previously published. As a result, preliminary and interim data should be viewed with caution until the final data are available. Adverse changes in the final data compared to the interim data could significantly harm our business prospects.

Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the particular product candidate or product and our company in general. In addition, the information we choose to publicly disclose regarding a particular preclinical study or clinical trial is based on what is typically extensive information, and you or others may not agree with what we determine is the material or otherwise appropriate information to include in our disclosure, and any information we determine not to disclose may ultimately be deemed significant with respect to future decisions, conclusions, views, activities or otherwise regarding a particular product, product candidate or our business.

If the preliminary and interim data that we report differ from actual results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for, and commercialize, our product candidates may be harmed, which could harm our business, operating results, prospects or financial condition.

A study design that is considered appropriate includes a sufficiently large sample size with appropriate statistical power to allow a meaningful interpretation of the results. The preliminary results of studies with smaller sample sizes can be disproportionately influenced by the impact the treatment had on a few individuals, which limits the ability to generalize the results across a broader community, thus making the study results less reliable than studies with a larger number of subjects.

Undesirable side effects that may be caused by our product candidates could cause us or regulatory authorities to interrupt, delay or halt clinical trials and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA, the EMA or other comparable foreign authorities. While our preclinical studies and clinical trials for our product candidates to date have generally been well tolerated from a risk-benefit perspective, the results from ongoing and future trials may not support this conclusion.

The results of future clinical studies may show that our product candidates cause undesirable or unacceptable side effects or even death. In such an event, our trials could be suspended or terminated and the FDA, the EMA or comparable foreign regulatory authorities could order us to cease further development of or deny approval of our product candidates for any or all targeted indications. The drug-related side effects could affect patient recruitment or the ability of enrolled patients to complete the trial or result in potential product liability claims. Any of these occurrences may harm our prospects significantly. Further, because all of our product candidates and preclinical programs are based on our DARPin technology, any adverse safety or efficacy findings related to any product candidate or preclinical program may adversely impact the viability of our other product candidates or preclinical programs.

Additionally, if any of our product candidates receives marketing approval and we or others later identify undesirable or unacceptable side effects caused by such products, a number of potentially significant negative consequences could result, including:

•regulatory authorities may withdraw approvals of such products and require us to take our approved product off the market;

•regulatory authorities may require the addition of labeling statements, specific warnings, a contraindication or field alerts to physicians and pharmacies;

•regulatory authorities may require a medication guide outlining the risks of such side effects for distribution to patients, or that we implement a risk evaluation and mitigation strategy, or REMS, plan to ensure that the benefits of the product outweigh its risks;

•regulatory authorities may require additional clinical trials;

•we may be required to change the way the product is administered, conduct additional clinical trials or change the labeling of the product;

•sales of the product may decrease significantly;

•we may be subject to litigation or product liability claims; and

•our reputation may suffer.

Any of these events could prevent us, our collaborators or our potential future partners from achieving or maintaining market acceptance of the affected product or could substantially increase commercialization costs and expenses, which in turn could delay or prevent us from generating significant revenue from the sale of our products.

Adverse side effects that may be caused by any of our product candidates could negatively impact the public perception of and commercial opportunities for all of our product candidates. The clinical and commercial success of our product candidates will depend in part on the absence of negative side effects caused by our product candidates. Even if an adverse side effect that results from one of our product candidates is unlikely to occur in our other product candidates, all of our product candidates could be adversely affected because the negative side effect may be perceived to be a likely side effect of all of our product candidates. Infusion-related reactions have been seen in MP0310, MP0317 and MP0533, and, while manageable, such reactions may limit the tolerability profile of a product candidate or its potential for combination with other medication. These adverse events may negatively affect the perception of the DARPin platform, the commercial opportunity for our product candidates or cause us to suspend clinical trials. In addition, if public perception is influenced by claims that radioligands or specific therapies within radioligands are unsafe or less safe than available alternatives, our product candidates may not be accepted by the general public or the medical community.

The market for pharmaceutical products is highly competitive. Our competitors include many established pharmaceutical companies, biotechnology companies, universities and other research or commercial institutions, many of which have substantially greater financial, research and development resources than us. Large pharmaceutical companies, in particular, have extensive experience in clinical testing, obtaining regulatory approvals, recruiting patients and manufacturing pharmaceutical products. Smaller and early stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These third parties compete with us in recruiting and retaining qualified scientific and management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, the development of our products. The fields in which we operate are characterized by rapid technological change and innovation. There can be no assurance that our competitors are not currently developing, or will not in the future develop, technologies and products that are equally or more effective or are more economically attractive as any of our current or future technology or product. Competing products or platforms may gain faster or greater market acceptance than our products or platform and medical advances or rapid technological development by competitors may result in our product candidates or platforms becoming non-competitive or obsolete before we are able to recover our research and development and commercialization expenses.

Additionally, certain of our product candidates may be administered in combination with approved pharmaceutical products. Our ability to develop and ultimately commercialize our product candidates used in combination with other therapies will depend on our ability to access these drugs on commercially reasonable terms for the clinical trials and their availability for use with the commercialized product, if approved. We cannot be certain that current or potential future commercial relationships will provide us with a sufficient supply of these drugs on commercially reasonable terms or at all. If we, our product candidates or our platforms do not compete effectively, it may have an adverse effect on our business and results of operation.

Identifying and qualifying patients to participate in our clinical trials is critical to our success. Patient enrollment depends on many factors, including the size and nature of the patient population, eligibility criteria for the trial, the proximity of patients to clinical sites, the design of the clinical protocol, the availability of competing clinical trials, the availability of new drugs approved for the indication the clinical trial is investigating, and clinicians' and patients' perceptions as to the potential advantages of the drug being studied in relation to other available therapies. Since some of our product candidates could be focused on addressing sub-groups of cancer patients, there are limited patient pools from which to draw in order to complete our clinical trials in a timely and cost-effective manner. Furthermore, if the actual number of patients with these pathologies is smaller than we anticipate, we may encounter difficulties in enrolling patients in our clinical trials, thereby delaying or preventing development and approval of our drug candidates. Even once enrolled we may be unable to retain a sufficient number of patients to complete any of our trials.

Furthermore, our efforts to build relationships with patient communities may not succeed, which could result in delays in patient enrollment in our clinical trials. In addition, any negative results we may report in clinical trials of one of our product candidates may make it difficult or impossible to recruit and retain patients in other clinical trials of that same product candidate. Delays in the completion of any clinical trial of our product candidates will increase our costs, slow down our product candidate development and approval process and delay or potentially jeopardize our ability to commence product sales and generate revenue. In addition, some of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates.

Additionally, our ability to successfully initiate, enroll and complete clinical trials in foreign countries is subject to numerous risks unique to conducting business in foreign countries, including:

•different standards for the conduct of clinical trials;

•difficulty in identifying and partnering with qualified local consultants, physicians and partners; and

•the potential burden of complying with a variety of foreign laws, medical standards and regulatory requirements, including the regulation of pharmaceutical and biotechnology research and products.

We are exposed to potential product liability and professional indemnity risks that are inherent in the research, development, manufacturing, marketing and use of pharmaceutical products.

Currently, we have no products that have been approved for commercial sale; however, the current and future use of product candidates by us and our corporate collaborators in clinical trials, and the potential sale of any approved products in the future, may expose us to liability claims. These claims might be made by patients who use the product, healthcare providers, pharmaceutical companies, our corporate collaborators or others selling such products. Any claims against us, regardless of their merit, could be difficult and costly to defend and could adversely affect the market for our product candidates or any prospects for commercialization of our product candidates. Although the clinical trial process is designed to identify and assess potential side effects, it is always possible that a drug, even after regulatory approval, may exhibit unforeseen side effects. If any of our product candidates were to cause adverse side effects during clinical trials or after approval of the product candidate, we may be exposed to substantial liabilities. Physicians and patients may not comply with any warnings that identify known potential adverse effects and patients who should not use our product candidates. Regardless of the merits or eventual outcome, liability claims may result in:

•decreased demand for our products due to negative public perception and injury to our reputation;

•withdrawal of clinical trial participants or difficulties in recruiting new trial participants;

•initiation of investigations by regulators;

•costs to defend or settle the related litigation;

•a diversion of management's time and our resources;

•substantial monetary awards to trial participants or patients;

•product recalls, withdrawals or labeling, marketing or promotional restrictions;

•loss of revenues from product sales; and

•the inability to commercialize any of our product candidates, if approved.

Although we maintain adequate clinical trial insurance for our product candidates, it is possible that our liabilities could exceed our insurance coverage. We intend to expand our insurance coverage to include the sale of commercial products if we obtain marketing approval for any of our product candidates. However, we may not be able to maintain insurance coverage at a reasonable cost or obtain insurance coverage that will be adequate to satisfy any liability that may arise. If a successful product liability claim or series of claims is brought against us for uninsured liabilities or in excess of insured liabilities, our assets may not be sufficient to cover such claims and our business operations could be impaired. Should any of the events described above occur, this could have an adverse effect on our business and results of operations.

We also conduct clinical trials outside the United States, including in Europe and are likely to continue to do so in these or other foreign jurisdictions. The acceptance of trial data from clinical trials conducted outside the United States by the FDA may be subject to certain conditions. In cases where data from clinical trials conducted outside the United States are intended to serve as the sole basis for marketing approval in the United States, the FDA will generally not approve the application on the basis of foreign data alone unless (i) the data are applicable to the U.S. population and medical practice; (ii) the trials were performed by clinical investigators of recognized competence and (iii) the data may be considered valid without the need for an on-site inspection by the FDA or, if the FDA considers such an inspection to be necessary, the FDA is able to validate the data through an on-site inspection or other appropriate means.

Additionally, the FDA’s clinical trial requirements, including sufficient size of patient populations and statistical powering, must be met. Many foreign regulatory bodies have similar approval requirements. In addition, such foreign trials would be subject to the applicable local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance that the FDA or any similar foreign regulatory authority will accept data from trials conducted outside of the United States or the applicable jurisdiction. If the FDA or any similar foreign regulatory authority does not accept such data, it would result in the need for additional trials, which would be costly and time-consuming and delay aspects of our business plan, and which may result in our product candidates not receiving approval or clearance for commercialization in the applicable jurisdiction.

The time required to obtain approval by the FDA, the EMA and comparable foreign authorities is unpredictable but typically takes many years, if obtained at all, following the commencement of clinical trials and depends upon numerous factors, including the substantial discretion of the regulatory authorities. In addition, approval policies, regulations, or the type and amount of clinical data necessary to gain approval may change during the course of a product candidate’s clinical development and may vary among jurisdictions. We have not obtained regulatory approval for any product candidate or product candidates licensed to our partners and it is possible that none of such existing product candidates or any product candidates we may seek to develop in the future will ever obtain regulatory approval.

Our product candidates could fail to receive regulatory approval for many reasons, including the following:

•the FDA, the EMA or comparable foreign regulatory authorities may disagree with the design or implementation of our clinical trials, including the size of our clinical trials or the doses tested;

•we may be unable to demonstrate to the satisfaction of the FDA, the EMA or comparable foreign regulatory authorities that a product candidate is safe, pure and potent or effective for its proposed indication;

•the results of clinical trials may not meet the level of statistical significance required by the FDA, the EMA or comparable foreign regulatory authorities for approval;

•we may be unable to demonstrate that a product candidate's clinical and other benefits outweigh its safety risks;

•the FDA, the EMA or comparable foreign regulatory authorities may disagree with our interpretation of data from preclinical studies or clinical trials or may require us to test additional dose regimens of our product candidates;

•the data collected from clinical trials of our product candidates may not be sufficient to support the submission of a Biologics License Application, or BLA, to the FDA or other submission or to obtain regulatory approval in the United States, the European Union or elsewhere;

•the FDA, the EMA or comparable foreign regulatory authorities may find deficiencies with or fail to approve the manufacturing processes or facilities of third-party manufacturers with which we contract for clinical and commercial supplies; and

•the approval policies or regulations of the FDA, the EMA or comparable foreign regulatory authorities may significantly change in a manner rendering our clinical data insufficient for approval.

This lengthy approval process as well as the unpredictability of future clinical trial results may result in our failing to obtain regulatory approval to market any of our product candidates, which would significantly harm our business. The FDA, the EMA and other comparable foreign authorities have substantial discretion in the approval process, and determining when or whether regulatory approval will be obtained for any of our product candidates. Even if we believe the data collected from clinical trials of our product candidates are promising, such data may not be sufficient to support approval by the FDA, the EMA or any other regulatory authority.

We or our partners may seek fast-track designation and review for some or all of our product candidates. If a drug is intended for the treatment of a serious or life-threatening condition or disease, and nonclinical or clinical data demonstrate the potential to address an unmet medical need, the product may qualify for FDA fast track designation, for which sponsors must apply. The FDA has broad discretion whether or not to grant this designation. Thus, even if we or our collaborators believe a particular product candidate is eligible for this designation, such as we received for ensovibep in June 2021, the FDA may decide not to grant it. Moreover, even if we do receive fast track designation, we or our collaborators may not experience a faster development process, review or approval compared to conventional FDA procedures. In addition, the FDA may withdraw fast track designation if it believes that the designation is no longer supported by data from the clinical development program.

If the FDA, the EMA or a comparable foreign regulatory authority approves any of our product candidates, the manufacturing processes, labeling, packaging, distribution, adverse event reporting, storage, advertising, promotion, recordkeeping, exporting and importing for the product will be subject to extensive and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, registration, as well as continued compliance with cGMPs and GCPs for any clinical trials that we conduct post-approval, all of which may result in significant expense and limit our ability to commercialize such products. In addition, any regulatory approvals that we receive for our product candidates may also be subject to limitations on the approved indicated uses for which the product may be marketed or to the conditions of approval, or contain requirements for potentially costly post marketing testing, including Phase 4 clinical trials, and surveillance to monitor the safety and efficacy of the product candidate.

Later discovery of previously unknown problems with our product candidates, including adverse events of unanticipated severity or frequency, or with our third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may result in, among other things:

•restrictions on the marketing or manufacturing of our product candidates, withdrawal of the product from the market or voluntary or mandatory product recalls;

•restrictions on product distribution or use, or requirements to conduct post-marketing studies or clinical trials;

•fines, restitutions, disgorgement of profits or revenues, warning letters, untitled letters or holds on clinical trials;

•refusal by the FDA, the EMA or comparable foreign regulatory authorities to approve pending applications or supplements to approved applications filed by us or suspension or revocation of approvals;

•product seizure or detention, or refusal to permit the import or export of our product candidates;

•negative impact to our reputation; and

•injunctions or the imposition of civil or criminal penalties.

The occurrence of any event or penalty described above may inhibit our ability to commercialize our product candidates and generate revenue and could require us to expend significant time and resources in response and could generate negative publicity.

In addition, if any of our product candidates is approved, our product labeling, advertising and promotion will be subject to regulatory requirements and continuing regulatory review. The FDA strictly regulates the promotional claims that may be made about drug products. In particular, a product may not be promoted for uses that are not approved by the FDA as reflected in the product’s approved labeling. If we receive marketing approval for a product candidate, physicians may nevertheless prescribe it to their patients in a manner that is inconsistent with the approved label based on the physician’s independent medical judgement. If we are found to have promoted such off-label uses, we may become subject to significant liability. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to significant sanctions. The federal government has levied large civil and criminal fines against companies for alleged improper promotion and has enjoined several companies from engaging in off-label promotion. The FDA has also requested that companies enter into consent decrees or permanent injunctions under which specified promotional conduct is changed or curtailed.

Our product candidates are classified as biologics in the United States and, therefore, can only be sold if we obtain a BLA from the FDA. The holder of a BLA is obligated to monitor and report adverse events and any failure of a product to meet the specifications in the BLA. The holder of a BLA must also submit new or supplemental applications and obtain FDA approval for certain changes to the approved product, product labeling or manufacturing process. Failure to comply with a BLA or any other ongoing regulatory obligation may result in suspension of approval to manufacture or distribute the relevant product, as well as fines or imprisonment for violations.

The FDA’s and other regulatory authorities’ policies may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. If we or one of our distributors, licensees or co-marketers are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not achieve or sustain profitability. We also cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive action, either in the United States or in other countries. For example, the policies and executive actions of the Biden administration may impact our business and industry. It is difficult to predict how these policies and executive actions will be implemented, and the extent to which they will impact the FDA’s ability to exercise its regulatory authority. If these policies or executive actions impose constraints on FDA’s ability to engage in oversight and implementation activities in the normal course, our business may be negatively impacted.

Because we have limited resources and access to capital to fund our operations, we must decide which product candidates to pursue and the amount of resources to allocate to each. Our decisions concerning the allocation of research, collaboration, management and financial resources toward particular compounds, product candidates or therapeutic areas may not lead to the development of viable commercial products and may divert resources away from better opportunities. Similarly, our decisions to delay, terminate or collaborate with third parties in respect of certain product development programs may also prove not to be optimal and could cause us to miss valuable opportunities. If we make incorrect determinations regarding the market potential of our product candidates or misread trends in the biopharmaceutical industry, in particular for our lead product candidates, our business, financial condition and results of operations could be adversely affected.

In the United States, the European Union and other foreign jurisdictions, there have been a number of legislative and regulatory changes to the healthcare system that could affect our future results of operations. In particular, there have been and continue to be a number of initiatives at the United States federal and state levels that seek to reduce healthcare costs and improve the quality of healthcare. For example, in March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively the ACA, became law. The ACA is a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, enhance remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes and fees on the health industry and impose additional health policy reforms.

The ACA, among other things, increased the minimum level of Medicaid rebates payable by manufacturers of brand name drugs; required collection of rebates for drugs paid by Medicaid managed care organizations; required manufacturers to participate in a coverage gap discount program, under which they must agree to offer point-of-sale discounts (increased to 70 percent, effective as of January 1, 2019) off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D; imposed a non-deductible annual fee on pharmaceutical manufacturers or importers who sell certain “branded prescription drugs” to specified federal government programs, implemented a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted, or injected expanded the types of entities eligible for the 340B drug discount program; expanded eligibility criteria for Medicaid programs; created a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research; and established a Center for Medicare Innovation at CMS to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending.

There have been executive, judicial and Congressional challenges to certain aspects of the ACA. While Congress has not passed comprehensive repeal legislation, several bills affecting the implementation of certain taxes under the ACA have been signed into law.

The Tax Cuts and Jobs Act of 2017, or the Tax Act, includes a provision that repealed, effective January 1, 2019, the tax-based shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year that is commonly referred to as the “individual mandate.” In addition, the 2020 federal spending package permanently eliminated, effective January 1, 2020, the ACA-mandated “Cadillac” tax on high-cost employer-sponsored health coverage and medical device tax and, effective January 1, 2021, also eliminated the health insurer tax. On June 17, 2021 the U.S. Supreme Court dismissed a challenge on procedural grounds that argued the ACA is unconstitutional in its entirety because the “individual mandate” was repealed by Congress. Further, on August 16, 2022, President Biden signed the Inflation Reduction Act of 2022, or IRA, into law, which among other things, extends enhanced subsidies for individuals purchasing health insurance coverage in ACA marketplaces through plan year 2025. The IRA also eliminates the “donut hole” under the Medicare Part D program beginning in 2025 by significantly lowering the beneficiary maximum out-of-pocket cost and creating a new manufacturer discount program. It is possible that the ACA will be subject to judicial or Congressional challenges in the future. It is unclear how such challenges, and the healthcare reform measures of the Biden administration will impact the ACA and our business.

In addition, other legislative changes have been proposed and adopted since the ACA was enacted. For example, on August 2, 2011, the Budget Control Act of 2011, among other things, includes aggregate reductions of Medicare payments to providers of 2% per fiscal year. These reductions went into effect on April 1, 2013 and, due to subsequent legislative amendments to the statute will remain in effect until 2032 unless additional U.S. Congressional action is taken. Additionally, on March 11, 2021, President Biden signed the American Rescue Plan Act of 2021 into law, which eliminates the statutory Medicaid drug rebate cap, currently set at 100% of a drug’s average manufacturer price, for single source and innovator multiple source drugs, beginning January 1, 2024. On January 2, 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among other things, further reduced Medicare payments to several types of providers, including hospitals, imaging centers and cancer treatment centers, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years.

Recently there has also been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products. Specifically, there have been several recent U.S. Congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs and reform government program reimbursement methodologies for drugs. At the federal level, in July 2021, the Biden administration released an executive order, “Promoting Competition in the American Economy,” with multiple provisions aimed at prescription drugs. In response to Biden’s executive order, on September 9, 2021, HHS released a Comprehensive Plan for Addressing High Drug Prices that outlines principles for drug pricing reform and sets out a variety of potential legislative policies that Congress could pursue as well as potential administrative actions HHS can take to advance these principles. In addition, the IRA, among other things (i) directs HHS to negotiate the price of certain high-expenditure, single-source drugs and biologics covered under Medicare and (ii) imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation. These provisions will take effect progressively starting in fiscal year 2023. On August 29, 2023, HHS announced the list of the first ten drugs that will be subject to price negotiations, although the Medicare drug price negotiation program is currently subject to legal challenges. In response to the Biden administration’s October 2022 executive order, on February 14, 2023, HHS released a report outlining three new models for testing by the CMS Innovation Center which will be evaluated on their ability to lower the cost of drugs, promote accessibility, and improve quality of care. It is unclear whether the models will be utilized in any health reform measures in the future. Further, on December 7, 2023, the Biden administration announced an initiative to control the price of prescription drugs through the use of march-in rights under the Bayh-Dole Act. On December 8, 2023, the National Institute of Standards and Technology published for comment a Draft Interagency Guidance Framework for Considering the Exercise of March-In Rights which for the first time includes the price of a product as one factor an agency can use when deciding to exercise march-in rights.

While march-in rights have not previously been exercised, it is uncertain if that will continue under the new framework. It is unclear whether these or similar policy initiatives will be implemented in the future. In addition, Congress is considering additional health reform measures.

At the state level, legislatures are increasingly passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. Legally mandated price controls on payment amounts by third-party payors or other restrictions could harm our business, results of operations, financial condition and prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce the ultimate demand for our products or put pressure on our product pricing, which could negatively affect our business, results of operations, financial condition and prospects.

We expect that additional U.S. federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that the U.S. federal government will pay for healthcare products and services, which could result in reduced demand for our product candidates or additional pricing pressures.

In the European Union, similar political, economic and regulatory developments may affect our ability to profitably commercialize our current or any future products. In addition to continuing pressure on prices and cost containment measures, legislative developments at the European Union or member state level may result in significant additional requirements or obstacles that may increase our operating costs. The delivery of healthcare in the European Union, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively a matter for national, rather than European Union, law and policy. National governments and health service providers have different priorities and approaches to the delivery of health care and the pricing and reimbursement of products in that context. In general, however, the healthcare budgetary constraints in most European Union member states have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with ever-increasing European Union and national regulatory burdens on those wishing to develop and market products, this could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to commercialize any products for which we obtain marketing approval. In international markets, reimbursement and healthcare payment systems vary significantly by country, and many countries have instituted price ceilings on specific products and therapies.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action, either in the United States or in other countries. If we or our collaborators are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we or our collaborators are not able to maintain regulatory compliance, our product candidates may lose any regulatory approval that may have been obtained and we may not achieve or sustain profitability, which would adversely affect our business.

Although we do not currently have any products on the market, our current and future operations may be directly, or indirectly through our relationships with healthcare providers, healthcare institutions, patients, customers and third-party payors, subject to various U.S. federal and state healthcare laws and regulations, including, without limitation, the U.S. federal Anti-Kickback Statute. Healthcare providers, physicians and others play a primary role in the recommendation and prescription of any products for which we obtain marketing approval.

These laws impact, among other things, our proposed sales, marketing and education programs and constrain our business and financial arrangements and relationships with third-party payors, healthcare professionals and healthcare institutions who participate in our clinical research programs, healthcare professionals and others who recommend, purchase, or provide our approved products, and other parties through which we market, sell and distribute our products for which we obtain marketing approval. In addition, we may be subject to patient data privacy and security regulation by both the U.S. federal government and the states in which we conduct our business. Finally, our current and future operations are subject to additional healthcare-related statutory and regulatory requirements and enforcement by regulatory authorities in jurisdictions in which we conduct our business. The laws that may affect our ability to operate include:

•the U.S. federal Anti-Kickback Statute, which prohibits, among other things, individuals or entities from knowingly and willfully soliciting, offering, receiving or paying any remuneration (including any kickback, bribe, or rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward either the referral of an individual for, or the purchase, lease, order or recommendation of, any good, facility, item or service, for which payment may be made, in whole or in part, under U.S. federal and state healthcare programs such as Medicare and Medicaid;

•the U.S. federal civil and criminal false claims and civil monetary penalties laws, including, without limitation, the civil False Claims Act (which can be enforced through "qui tam," or whistleblower actions, by private citizens on behalf of the federal government), which prohibits, among other things, individuals or entities from knowingly presenting, or causing to be presented, to the U.S. federal government, claims for payment or approval that are false or fraudulent or for knowingly making a false statement to avoid, decrease or conceal an obligation to pay money to the U.S. federal government;

•the U.S. federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which prohibits, among other things, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, or knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false statement, in connection with the delivery of, or payment for, healthcare benefits, items or services;

•HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009, or HITECH, and its implementing regulations, and as amended again by the Final HIPAA Omnibus Rule, published in January 2013, which imposes certain obligations, including mandatory contractual terms, with respect to safeguarding the privacy, security and transmission of individually identifiable health information without appropriate authorization by certain health plans, healthcare clearinghouses and healthcare providers, known as covered entities, as well as their business associates that perform certain services involving the use, disclosure or transmission of individually identifiable health information for or on behalf of a covered entity, and their covered subcontractors;

•the U.S. Federal Food, Drug, and Cosmetic Act, or FDCA, which prohibits, among other things, the adulteration or misbranding of drugs, biologics and medical devices;

•the U.S. federal physician payment transparency legislation, commonly referred to as Physician Payments Sunshine Act, and its implementing regulations, which requires certain manufacturers of drugs, devices, biologics and medical supplies that are reimbursable under Medicare, Medicaid, or the Children's Health Insurance Program to report annually to CMS information related to certain payments and other transfers of value to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors), other healthcare professionals (such as physician assistants and nurse practitioners), and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members;

•analogous state laws and regulations, including: state anti-kickback and false claims laws, which may apply to our business practices, including but not limited to, research, distribution, sales and marketing arrangements and claims involving healthcare items or services reimbursed by any third-party payor, including private insurers; state laws that require pharmaceutical companies to comply with the pharmaceutical industry's voluntary compliance guidelines and the relevant compliance guidance promulgated by the U.S. federal government, or otherwise restrict payments that may be made to healthcare providers and other potential referral sources; and state laws and regulations that require drug manufacturers to file reports relating to pricing and marketing information, which requires tracking gifts and other remuneration and items of value provided to healthcare professionals and entities, state and local laws that require the registration of pharmaceutical sales representatives; and state laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts; and

•European and other foreign law equivalents of each of the above laws, including reporting requirements detailing interactions with and payments to healthcare providers.

It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in government funded healthcare programs, such as Medicare and Medicaid or comparable foreign programs, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, reputational harm and the curtailment or restructuring of our operations.

The risk of us being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations. For example, the definition of the “remuneration” under the U.S. federal Anti-Kickback Statute has been interpreted to include anything of value. Further, courts have found that if “one purpose” of remuneration is to induce referrals, the U.S. federal Anti-Kickback Statute is violated.

Additionally, recent healthcare reform legislation has strengthened federal and state healthcare fraud and abuse laws. For example, the ACA amends the intent requirement of the U.S. federal Anti-Kickback Statute and criminal healthcare fraud statutes to clarify that liability under these statutes does not require a person or entity to have actual knowledge of the statutes or a specific intent to violate them in order to have committed a violation. Moreover, the ACA provides that the government may assert that a claim that includes items or services resulting from a violation of the U.S. federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act. Because of the breadth of these laws and the narrowness of the statutory exceptions and regulatory safe harbors available, it is possible that some of our business activities could be subject to challenge under one or more of such laws.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations will involve substantial costs. Any action against us for violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management's attention from the operation of our business. The shifting compliance environment and the need to build and maintain robust and expandable systems to comply with multiple jurisdictions with different compliance or reporting requirements increases the possibility that a healthcare company may run afoul of one or more of the requirements.

The availability of coverage and adequate reimbursement by third-party payors, including governmental healthcare programs such as Medicare and Medicaid, private health insurers and managed care organizations, is essential for most patients to be able to afford products such as our product candidates, assuming approval. Our ability to achieve acceptable levels of coverage and reimbursement for products by third-party payors will have an effect on our ability to successfully commercialize, and attract additional collaboration partners to invest in the development of our product candidates. Assuming we obtain coverage for a given product by a third-party payor, the resulting reimbursement payment rates may not be adequate or may require co-payments that patients find unacceptably high. We cannot be sure that coverage and reimbursement in the United States, the European Union or elsewhere will be available for any product that we may develop, and any reimbursement that may become available may be decreased or eliminated in the future.

Third-party payors increasingly are challenging prices charged for pharmaceutical products and services, and many third-party payors may refuse to provide coverage and reimbursement for particular drugs when an equivalent generic drug or a less expensive therapy is available. It is possible that a third-party payor may consider our product candidate and other therapies as substitutable and only offer to reimburse patients for the less expensive product. Even if we show improved efficacy or improved convenience of administration with our product candidate, pricing of existing drugs may limit the amount we will be able to charge for our product candidate. Third-party payors may deny or revoke the reimbursement status of a given drug product or establish prices for new or existing marketed products at levels that are too low to enable us to realize an appropriate return on our investment in product development. If coverage and reimbursement is not available or is available only at limited levels, we may not be able to successfully commercialize our product candidates, and may not be able to obtain a satisfactory financial return on products that we may develop.

There is significant uncertainty related to the third-party payor coverage and reimbursement of newly approved products. In the United States, third-party payors play an important role in determining the extent to which new drugs and biologics will be covered. The Medicare and Medicaid programs increasingly are used as models for how private payors and other governmental payors develop their coverage and reimbursement policies for drugs and biologics. Some third-party payors may require pre-approval of coverage for new or innovative devices or drug therapies before they will reimburse health care providers who use such therapies. It is difficult to predict at this time what third-party payors will decide with respect to the coverage and reimbursement for our product candidates.

Obtaining and maintaining reimbursement status is time-consuming and costly. No uniform policy for coverage and reimbursement for drug products exists among third-party payors in the United States. Therefore, coverage and reimbursement for drug products can differ significantly from payor to payor. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support for the use of our products to each payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or obtained in the first instance. Furthermore, rules and regulations regarding reimbursement change frequently, in some cases at short notice, and we believe that changes in these rules and regulations are likely.

Outside the United States, international operations are generally subject to extensive governmental price controls and other market regulations, and we believe the increasing emphasis on cost-containment initiatives in Europe, Canada and other countries has and will continue to put pressure on the pricing and usage of our product candidates. In many countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems. Other countries allow companies to fix their own prices for medical products, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our products may be reduced compared with the United States and may be insufficient to generate commercially reasonable revenue and profits.

The delivery of healthcare in the European Union, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively a matter for national, rather than European Union, law and policy. National governments and health service providers have different priorities and approaches to the delivery of healthcare and the pricing and reimbursement of products in that context. In general, however, the healthcare budgetary constraints in most European Union member states have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with ever-increasing European Union and national regulatory burdens on those wishing to develop and market products, this could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to commercialize any products for which we obtain marketing approval.

Moreover, increasing efforts by governmental and third-party payors in the European Union, the United States and abroad to cap or reduce healthcare costs may cause such organizations to limit both coverage and the level of reimbursement for newly approved products and, as a result, they may not cover or provide adequate payment for our product candidates. We expect to experience pricing pressures in connection with the sale of any of our product candidates due to the trend toward managed healthcare, the increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on healthcare costs in general, particularly prescription drugs and surgical procedures and other treatments, has become very intense. As a result, increasingly high barriers are being erected to the entry of new products.

Our product candidates are at varying stages of development and we may never have a product that is commercially successful. To date, we have no product authorized for marketing. Our lead product candidates are in the relatively early stages of clinical development. Our lead product candidates will require further clinical investigation, regulatory review, significant marketing efforts and substantial investment before they can provide us with any revenues. Furthermore, if and when available on the market, our products may not achieve an adequate level of acceptance by physicians, patients and the medical community, and we may not become profitable. If our products are not accepted, we may need to increase our efforts to educate the medical community and third-party payors on the benefits of our products, which may require significant resources and may never be successful.

Market acceptance of our future products by physicians, patients and healthcare payors will depend on a number of factors, many of which are beyond our control, including:

•the wording of the product label;

•changes in the standard of care as well as recommendations from relevant national and/or international associations for the targeted indications for any product candidate;

•sales, marketing and distribution support;

•potential product liability claims;

•acceptance by physicians, patients and healthcare payors of each product as safe and effective;

•relative convenience, ease of use, ease of administration and other perceived advantages over alternative products;

•availability of coverage and adequate reimbursement from third-party payors and the willingness of patients to pay out-of-pocket in the absence of adequate reimbursement;

•prevalence and severity of adverse events or publicity;

•limitations, precautions or warnings listed in the summary of product characteristics, patient information leaflet, package labeling or instructions for use;

•the cost of treatment with our products in relation to alternative treatments;

•the extent to which products are approved for inclusion and reimbursed on formularies of hospitals and managed care organizations; and

•whether our products are designated in the label, under physician treatment guidelines or under reimbursement guidelines as a first-line, second-line, third-line or last-line therapy.

If our product candidates fail to gain market acceptance, this will have a material adverse impact on our ability to generate revenues to provide a satisfactory, or any, return on our investments. Even if a potential product displays a favorable efficacy and safety profile in preclinical studies and clinical trials, market acceptance of the product will not be fully known until after it is launched. Furthermore, even if some products achieve market acceptance, the market may prove not to be large enough to allow us to generate significant revenues.

We do not have a sales or marketing infrastructure and have no experience in the sale or marketing of pharmaceutical products. To achieve commercial success for any approved product, we must develop or acquire a sales and marketing organization, outsource these functions to third parties or enter into collaboration or license arrangements with third parties.

To the extent possible, we may establish our own sales and marketing capabilities and promote our product candidates if and when regulatory approval has been obtained in the major European Union countries and the United States for certain of our product candidates. There are risks involved should we decide to establish our own sales and marketing capabilities or enter into arrangements with third parties to perform these services. Even if we establish sales and marketing capabilities, we may fail to launch or market our products effectively since we have no experience in the sales and marketing of pharmaceutical products.

In addition, recruiting and training a sales force is expensive and time consuming and could delay any product launch. In the event that any such launch is delayed or does not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel. Factors that may inhibit our efforts to commercialize our products on our own include:

•our inability to build a supply chain with sufficient coverage and capacity to fully support the sales and marketing efforts of any future products;

•our inability to recruit, train and retain adequate numbers of effective sales and marketing personnel;

•the inability of sales personnel to obtain access to or our failure to educate adequate numbers of physicians on the benefits of any future products;

•the lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with more extensive product lines;

•unforeseen costs and expenses associated with creating an independent sales and marketing organization; and

•costs of marketing and promotion above those anticipated by us.

If we enter into arrangements with third parties to perform sales and marketing services, our product revenues or profitability could be lower than if we were to market and sell any products that we develop ourselves. Such collaborative arrangements may place the commercialization of our products outside of our control and would make us subject to a number of risks including that we may not be able to control the amount or timing of resources that our collaborative partner devotes to our products or that our collaborator's willingness or ability to complete its obligations, and our obligations under our arrangements, may be adversely affected by business combinations or significant changes in our collaborator's business strategy. In addition, we may not be successful in entering into arrangements with third parties to sell and market our products or may be unable to do so on terms that are favorable to us. Acceptable third parties may fail to devote the necessary resources and attention to sell and market our products effectively.

If we do not establish sales and marketing capabilities successfully, either on our own or in collaboration with third parties, we may not be successful in commercializing our products, which in turn would have a material adverse effect on our business, prospects, financial condition and results of operations.

The Biologics Price Competition and Innovation Act of 2009, or BPCIA, created an abbreviated approval pathway for biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological product. Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a full BLA for the competing product containing the sponsor's own preclinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity and potency of their product. The law is complex and is still being interpreted and implemented by the FDA. As a result, its ultimate impact, implementation and meaning are subject to uncertainty.

We believe that any of our product candidates approved as a biological product under a BLA should qualify for the 12-year period of exclusivity. However, there is a risk that this exclusivity could be shortened due to U.S. Congressional action or otherwise, or that the FDA will not consider our product candidates to be reference products for competing products, potentially creating the opportunity for generic competition sooner than anticipated. Other aspects of the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the subject of recent litigation. Moreover, the extent to which a biosimilar, once approved, will be substituted for any one of our reference products in a way that is similar to traditional generic substitution for non-biological products is not yet clear, and will depend on a number of marketplace and regulatory factors that are still developing.

The European Union provides opportunities for data and market exclusivity related to marketing authorizations. Upon receiving a marketing authorization, innovative medicinal products are generally entitled to receive eight years of data exclusivity and 10 years of market exclusivity. Data exclusivity, if granted, prevents regulatory authorities in the European Union from referencing the innovator’s data to assess a generic application or biosimilar application for eight years from the date of authorization of the innovative product, after which a generic or biosimilar marketing authorization application can be submitted, and the innovator’s data may be referenced. The market exclusivity period prevents a successful generic or biosimilar applicant from commercializing its product in the European Union until 10 years have elapsed from the initial marketing authorization of the reference product in the European Union. The overall ten-year period may, occasionally, be extended for a further year to a maximum of 11 years if, during the first eight years of those ten years, the marketing authorization holder obtains an authorization for one or more new therapeutic indications which, during the scientific evaluation prior to their authorization, are held to bring a significant clinical benefit in comparison with existing therapies. However, there is no guarantee that a product will be considered by the European Union’s regulatory authorities to be a new chemical/biological entity, and products may not qualify for data exclusivity.

In the EU, there is a special regime for biosimilars, or biological medicinal products that are similar to a reference medicinal product but that do not meet the definition of a generic medicinal product. For such products, the results of appropriate preclinical or clinical trials must be provided in support of an application for MA. Guidelines from the EMA detail the type of quantity of supplementary data to be provided for different types of biological product.

We also believe that our product candidates in the EEA should benefit from this data and market exclusivity. As with the U.S., however, if competitors obtain marketing authorization for their biosimilar products, our products may become subject to competition from these biosimilars, with the attendant competitive pressure and consequences.

For planning purposes, we estimate the timing of achieving various scientific, clinical, regulatory, and other product development objectives. These milestones may include our expectations regarding the commencement or completion of scientific studies and clinical trials, regulatory submissions or commercialization objectives. From time to time, we may publicly announce the expected timing of some of these milestones, such as the completion of an ongoing clinical trial, the initiation of clinical trials, receipt of regulatory approval, or the commercial launch of a product. The achievement of many of these milestones may be outside of our control. All of these milestones are based on a variety of assumptions, which may cause the timing of achieving the milestones to vary considerably from our estimates, including:

•our available capital resources or capital constraints we experience;

•the rate of progress, costs, and results of our clinical trials and research and development activities, including the extent of scheduling conflicts with participating clinicians and collaborators;

•our ability to identify and enroll patients who meet clinical trial eligibility criteria;

•our receipt of approvals by the FDA, EMA and comparable foreign regulatory authorities, and the timing thereof;

•other actions, decisions, or rules issued by regulators;

•our ability to access sufficient, reliable, and affordable supplies of materials used in the manufacture of our product candidates;

•our ability to manufacture and supply clinical trial materials to our clinical sites on a timely basis;

•the efforts of our collaborators with respect to the commercialization of our approved products, if any; and

•the securing of, costs related to, and timing issues associated with, commercial product manufacturing, as well as sales and marketing activities.

If we fail to achieve announced milestones in the timeframes we expect, the commercialization of our current or any future product candidates may be delayed, and our business, results of operations, financial condition, and prospects may be adversely affected.

The international biopharmaceutical and medical technology industry is highly regulated by the FDA, the EMA and other comparable foreign authorities and by other national or supra-national regulatory authorities that impose substantial requirements covering nearly all aspects of our activities notably on research and development, manufacturing, preclinical tests, clinical trials, labeling, marketing, sales, storage, record keeping, promotion and pricing of our product candidates. Such regulation is further subject to regular review by the FDA, the EMA and other comparable foreign authorities which may result in changes in applicable regulation. If we do not comply with one or more of these requirements in a timely manner, or at all, our product development could experience significant delays as a result of the FDA, the EMA or other comparable regulatory authorities recommending non-approval or restrictions on approval of a product candidate, leading to an inability to successfully commercialize any of our product candidates, which would materially harm our business. Any failure of any of our product candidates in clinical studies or to receive regulatory approval could have a material adverse effect on our business, results of operations and financial condition. If any of our product candidates fails to obtain approval on the basis of any applicable condensed regulatory approval process, this will prevent such product candidate from obtaining approval in a shortened time frame, or at all, resulting in increased expenses which would materially harm our business.

Compliance with requirements laid down by local regulatory authorities is necessary in each country where we, or any of our partners or licensees, conduct said activities in whole or in part. Local regulatory authorities notably include the EMA and the FDA. In order to market our future products in regions such as the European Economic Area, United States of America, Asia Pacific and many other foreign jurisdictions, we must obtain separate regulatory approvals. The approval procedures vary among countries and can require additional clinical testing, and the time required to obtain approval may differ from that required to obtain for example FDA or EMA approval.

Moreover, clinical studies conducted in one country may not be accepted by regulatory authorities in other countries. Approval by the FDA or EMA does not ensure approval by the comparable foreign authorities in other countries, and approval by one or more foreign regulatory authorities does not ensure approval by regulatory authorities in other foreign countries or by the FDA or EMA.

There can be no assurance that our product candidates will fulfil the criteria required to obtain necessary regulatory approval to access the market. Also, at this time, we cannot guarantee or know the exact nature, precise timing and detailed costs of the efforts that will be necessary to complete the remainder of the development of our research programs and products candidates. Each of the FDA, the EMA and other comparable foreign authorities may impose its own requirements, may discontinue an approval or revoke a license, may refuse to grant approval, or may require additional data before granting approval, notwithstanding that approval may have been granted by the FDA, the EMA or one or more other comparable foreign authority. The FDA, the EMA or other comparable foreign authorities may also approve a product candidate for fewer or more limited indications or patient sub-segments than requested or may grant approval subject to the performance of post-marketing studies. The EMA's, the FDA's or other regulatory authority's approval may be delayed, limited or denied for a number of reasons, most of which are beyond our control. Such reasons could include, among others, the production process or site not meeting the applicable requirements for the manufacture of regulated products, or the products not meeting applicable requirements for safety, purity or potency, or efficacy, during the clinical development stage or after marketing. No assurance can be given that clinical trials will be approved the FDA, the EMA or other comparable foreign authorities or that products will be approved for marketing by such regulatory authorities in any pre-determined indication or intended use. Any of the FDA, the EMA and other comparable foreign authorities may disagree with our interpretation of data submitted for their review.

We and our collaborative partners are, or may become subject to, numerous ongoing other regulatory obligations, such as data protection, environmental, health and safety laws and restrictions on the experimental use of animals. The costs of compliance with such applicable regulations, requirements or guidelines could be substantial, and failure to comply could result in sanctions, including fines, injunctions, civil penalties, denial of applications for marketing authorization of our products, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of products, operating restrictions and criminal prosecutions, any of which could significantly increase our or our collaborative partners' costs or delay the development and commercialization of our product candidates.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel, and accept payment of user fees, and statutory, regulatory, and policy changes. Average review times at the agency have fluctuated in recent years as a result. In addition, government funding of other government agencies on which our operations may rely, including those that fund research and development activities is subject to the political process, which is inherently fluid and unpredictable.

Disruptions at the FDA and other agencies may also slow the time necessary for new drugs to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. For example, over the last several years, the U.S. government has shut down several times, and certain regulatory agencies, such as the FDA, have had to furlough critical FDA and other government employees and stop critical activities.

If a prolonged government shutdown occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Further, in our operations as a public company, future government shutdowns could impact our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.

Certain laws and regulations require us to test our product candidates on animals before initiating clinical trials involving humans. Animal testing activities have been the subject of controversy and adverse publicity. Animal rights groups and other organizations and individuals have attempted to stop animal testing activities by pressing for legislation and regulation in these areas and by disrupting these activities through protests and other means. To the extent the activities of these groups are successful, our research and development activities may be interrupted, delayed or become more expensive.

Our operations, including our research, development, testing and manufacturing activities, are subject to numerous environmental, health and safety laws and regulations. These laws and regulations govern, among other things, the controlled use, handling, release and disposal of, and the maintenance of a registry for, hazardous materials and biological materials, such as radioactive compounds and byproducts, chemical solvents, human cells, carcinogenic compounds, mutagenic compounds and compounds that have a toxic effect on reproduction, laboratory procedures and exposure to blood-borne pathogens. We cannot eliminate, and we cannot guarantee that our third-party partners would eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also incur significant costs associated with civil or criminal fines and penalties for failure to comply with such laws and regulations.

Our professional liability insurance and our accident insurance, which cover for costs and expenses we may incur due to environmental liability that may be asserted against us or due to injuries to our employees resulting from the use of hazardous materials, may not provide adequate coverage against potential liabilities.

As with other companies engaged in activities similar to ours, we face a risk of environmental liability inherent in our current and historical activities, including liability relating to releases of or exposure to hazardous or biological materials. Environmental, health and safety laws and regulations are becoming more stringent. We may be required to incur substantial expenses in connection with future environmental compliance or remediation activities, in which case, our production and development efforts may be interrupted or delayed and our financial condition and results of operations may be adversely affected.

Further with respect to the operations of our third-party contract manufacturers, it is possible that if they fail to operate in compliance with applicable environmental, health and safety laws and regulations or properly dispose of wastes associated with our product candidates or products, we could be held liable for any resulting damages, suffer reputational harm or experience a disruption in the manufacture and supply of our product candidates or products, if approved.

Our research, development and manufacturing activities involve the controlled use of hazardous materials, including chemicals, radioactive and biological materials, such as radioisotopes. We are subject to federal, state, local and foreign environmental laws and regulations governing, among other matters, the handling, storage, use and disposal of these materials and some waste products. In addition, we are required to obtain and maintain a hazardous materials license, pursuant to which we are required to perform annual self-audits, and that may result in random inspections by regulators. If such audit or inspection were to result in adverse findings, it may impact our ability to maintain our license, which would in turn adversely affect our ability to conduct our business. Additionally, we cannot completely eliminate the risk of contamination or injury from these materials and we could be held liable for any damages that result, which could exceed our financial resources. We currently maintain insurance coverage for injuries resulting from the hazardous materials we use; however, future claims may exceed the amount of our coverage. Also, we do not have insurance coverage for pollution cleanup and removal. Currently the costs of complying with such federal, state, local and foreign environmental regulations are not significant, and consist primarily of waste disposal expenses. However, they could become expensive, and current or future environmental laws or regulations may impair our research, development, production and commercialization efforts.

We are exposed to the risk that our employees, independent contractors, principal investigators, CROs, consultants, vendors and collaboration partners may engage in fraudulent conduct or other illegal activities. Misconduct by these parties could include intentional, reckless and negligent conduct or unauthorized activities that violate: the regulations of the FDA, the EMA and other comparable foreign authorities, including those laws that require the reporting of true, complete and accurate information to such authorities; manufacturing standards; federal and state data privacy, security, fraud and abuse and other healthcare laws and regulations in the United States and abroad; or laws that require the reporting of true, complete and accurate financial information and data. Specifically, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, misconduct, kickbacks, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Activities subject to these laws could also involve the improper use or misrepresentation of information obtained in the course of clinical trials or creating fraudulent data in our preclinical studies or clinical trials, which could result in regulatory sanctions and cause serious harm to our reputation. It is not always possible to identify and deter misconduct by employees and other third parties, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to comply with such laws or regulations. Additionally, we are subject to the risk that a person could allege such fraud or other misconduct, even if none occurred. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business and results of operations, including the imposition of significant civil, criminal and administrative penalties, damages, monetary fines, disgorgements, possible exclusion from participation in Medicare, Medicaid and other U.S.

federal healthcare programs, individual imprisonment, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, other sanctions, contractual damages, reputational harm, diminished profits and future earnings and curtailment of our operations.

If any of our product candidates are approved for commercial sale, we will be highly dependent upon consumer perceptions of the safety and quality of our products. We could be adversely affected if we were subject to negative publicity or if any of our products or any similar products distributed by other companies prove to be, or are asserted to be, harmful to patients. Because of our dependence upon consumer perception, any adverse publicity associated with illness or other adverse effects resulting from patients' use or misuse of our products or any similar products distributed by other companies could have a material adverse impact on our business and results of operations.

Future adverse events in research into the oncology and virology fields that we focus our research efforts on, or the biopharmaceutical industry more generally, could also result in greater governmental regulation, stricter labeling requirements and potential regulatory delays in the testing or approvals of our products. Any increased scrutiny could delay or increase the costs of obtaining regulatory approval for our product candidates.

Although a substantial amount of our efforts will focus on the continued preclinical and clinical testing and potential approval of our product candidates in our current pipeline, a key element of our long-term growth strategy is to develop and market additional product candidates. Because we have limited managerial resources, research programs to identify product candidates will require substantial additional technical, financial and human resources, whether or not any product candidates are ultimately identified. The success of this strategy depends partly upon our ability to identify, select and develop promising product candidates and products. Our DARPin platform and future platforms may fail to discover and to generate additional product candidates that are suitable for further development. All product candidates are prone to risks of failure typical of pharmaceutical product development, including the possibility that a product candidate may not be suitable for clinical development as a result of its harmful side effects, limited efficacy or other characteristics that indicate that it is unlikely to be a product that will receive approval by the FDA, the EMA and other comparable foreign regulatory authorities and achieve market acceptance. If we do not successfully develop and commercialize product candidates based upon our DARPin technology approach, we may not be able to obtain product or collaboration revenues in future periods, which would adversely affect our business and results of operations.

Because we have limited financial and managerial resources, we focus on research programs and DARPin product candidates for specific indications, mode of actions or targets. As a result, we may forego or delay pursuit of opportunities with other DARPin product candidates or other indications that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development programs and DARPin product candidates for specific indications may not yield any commercially viable products.

If we do not accurately evaluate the commercial potential or target market for a particular DARPin product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or other royalty arrangements in cases in which it would have been advantageous for us to retain sole development and commercialization rights.

Our product candidates are biologics and require processing steps that are more difficult than those required for most chemical pharmaceuticals. Accordingly, multiple steps are needed to control the manufacturing processes. Problems with these manufacturing processes, even minor deviations from the normal process or from the materials used in the manufacturing process, which may not be detectable by us in a timely manner, could lead to product defects or manufacturing failures, resulting in lot failures, product recalls, product liability claims and insufficient inventory.

Also, certain raw materials or other products necessary for the manufacture and formulation of our product candidates, some of which are difficult to source, are provided by single-source unaffiliated third-party suppliers. In addition, we rely on certain third parties to perform filling, finishing, distribution, laboratory testing and other services related to the manufacture of our product candidates, and to supply various raw materials and other products, including for the RDT where we will rely on isotope providers and third-parties capabilities in radio-labelling and product supply. We would be unable to obtain these raw materials, other products, or services for an indeterminate period of time if any of these third parties were to cease or interrupt production or otherwise fail to supply these materials, products, or services to us for any reason, including due to regulatory requirements or actions (including recalls), adverse financial developments at or affecting the supplier, failure by the supplier to comply with cGMPs, contamination, business interruptions, or labor shortages or disputes. In any such circumstances, we may not be able to engage a backup or alternative supplier or service provider in a timely manner or at all. This, in turn, could materially and adversely affect our ability to supply product candidates, which could materially and adversely affect our business and future prospects.

We may develop our DARPin platform and other current or future product candidates in combination with one or more currently approved therapies. Even if any product candidates we develop were to receive marketing approval or be commercialized for use in combination with other existing therapies, we would continue to be subject to the risks that the FDA or comparable foreign regulatory authorities could revoke approval of the therapy used in combination with our DARPin platform or any other current or future product candidates or that safety, efficacy, manufacturing, or supply issues could arise with these existing therapies. This could result in our own product candidates being removed from the market or being less successful commercially.

We may also evaluate our DARPin platform or any other current or future product candidates in combination with one or more other therapies that have not yet been approved for marketing by the FDA or comparable foreign regulatory authorities. We will not be able to market and sell our DARPin product candidates or any product candidate we develop in combination with any such unapproved therapies that do not ultimately obtain marketing approval. These unapproved therapies may face the same risks described with respect to our product candidates, including the emergence of adverse events and delays in their clinical trials. If the FDA or comparable foreign regulatory authorities do not approve these other therapies or revoke their approval of, or if safety, efficacy, manufacturing, or supply issues arise with, the therapies we choose to evaluate in combination with our DARPin product candidates or any other product candidate we develop, we may be unable to obtain approval of or market our DARPin product candidates or any other product candidate we develop.

In the ordinary course of business, we collect, receive, store, process, generate, use, transfer, disclose, make accessible, protect, secure, dispose of, transmit, and share (commonly known as processing) personal data and other sensitive information, including proprietary and confidential business data, trade secrets, intellectual property, data we collect about trial participants in connection with clinical trials, and sensitive third-party data. Our data processing activities subject us to numerous data privacy and security obligations, such as various laws, regulations, guidance, industry standards, external and internal privacy and security policies, contracts, and other obligations that govern the processing of personal data by us and on our behalf. In the United States, numerous federal and state laws, rules and regulations, including federal health information privacy laws, state data breach notification laws, state health information privacy laws, and federal and state consumer protection laws that govern the collection, processing of personal information, including health-related personal information, could apply to our operations or the operations of our collaborators. For example, HIPAA, as amended by HITECH, imposes specific requirements relating to the privacy, security, and transmission of individually identifiable health information. We may obtain health information from third parties (including research institutions from which we obtain clinical trial data) that are subject to privacy and security requirements under HIPAA. Depending on the facts and circumstances, we may be subject to civil, criminal, and administrative penalties if we knowingly obtain, use, or disclose individually identifiable health information in a manner that is not authorized or permitted by HIPAA.

Additionally, the California Consumer Privacy Act, or CCPA, imposes obligations on covered businesses. These obligations include, but are not limited to, providing specific disclosures in privacy notices and affording California residents certain rights related to their personal data. The CCPA allows for statutory fines for noncompliance (up to $7,500 per violation) and includes a private right of action for certain data breaches. Although the CCPA exempts some data processed in the context of clinical trials, the CCPA may increase compliance costs and potential liability with respect to other personal data we maintain about California residents. In addition the California Privacy Rights Act of 2020, or CPRA, effective January 1, 2023, expands the CCPA, including by adding a new right for individuals to correct their personal information and establishing a new regulatory agency to implement and enforce the law. Other states have enacted data privacy laws as well. For example, Virginia passed the Consumer Data Protection Act, and Colorado passed the Colorado Privacy Act, both of which become effective in 2023. While these states, like the CCPA, also exempt some data processed in the context of clinical trials, these developments further complicate compliance efforts, and increase legal risk and compliance costs for us and the third parties upon whom we rely. Data privacy and security laws have been proposed at the federal, state, and local levels in recent years, which could further complicate compliance efforts.

Outside the United States, an increasing number of laws, regulations, and industry standards apply to data privacy and security. For example, the European Union’s General Data Protection Regulation, or EU GDPR, and the United Kingdom’s GDPR, or UK GDPR, impose strict requirements for processing personal data. For example, under the EU GDPR, government regulators may impose temporary or definitive bans on data processing, as well as fines of up to 20 million euros or 4% of annual global revenue, whichever is greater. Further, companies may face private litigation related to processing of personal data brought not only by individuals but also by classes of data subjects or consumer protection organizations authorized at law to represent their interests. Additionally, EU member states are also able to legislate separately on health and genetic data, and we must comply with these local laws where we operate.

The revised Swiss Federal Act on Data Protection, or DPA, entered into force on September 1, 2023 and also applies to the collection and processing of personal data, including health-related information, by companies located in Switzerland, or in certain circumstances, by companies located outside of Switzerland.

Certain jurisdictions have enacted data localization laws and cross-border personal data transfer laws, which could make it more difficult to transfer information across jurisdictions (such as transferring or receiving personal data that originates in the EU or in other foreign jurisdictions). Existing mechanisms that facilitate cross-border personal data transfers may change or be invalidated. For example, absent appropriate safeguards or other circumstances, the EU GDPR generally restricts the transfer of personal data to countries outside of the European Economic Area, or EEA, such as the United States, which are not considered by the European Commission to provide an adequate level of data protection. The European Commission released a set of “Standard Contractual Clauses,” or SCCs, that are designed to be a valid mechanism to facilitate personal data transfers out of the EEA to these jurisdictions. Currently, these SCCs are a valid mechanism to transfer personal data outside of the EEA, but this mechanism is subject to legal challenge. Additionally, the SCCs impose additional compliance burdens, such as conducting transfer impact assessments to determine whether additional security measures are necessary to protect the at-issue personal data. In addition, Switzerland and the UK similarly restrict personal data transfers outside of those jurisdictions to countries such as the United States that do not provide an adequate level of personal data protection. If we cannot implement a valid compliance mechanism for cross-border data transfers, we may face increased exposure to regulatory actions, substantial fines, and injunctions against processing or transferring personal data from Europe or other foreign jurisdictions. The inability to import personal data to the United States could significantly and negatively impact our business operations, including by limiting our ability to conduct clinical trial activities in Europe and elsewhere; limiting our ability to collaborate with parties that are subject to such cross-border data transfer or localization laws; or requiring us to increase our personal data processing capabilities and infrastructure in foreign jurisdictions at significant expense.

We are also bound by contractual obligations related to data privacy and security, and our efforts to comply with such obligations may not be successful. For example, certain privacy laws, such as the GDPR and the CCPA, require our collaborators to impose specific contractual restrictions on their service providers. We publish privacy policies, and other statements, such as compliance with certain certifications or self-regulatory principles, regarding data privacy and security. If these policies, materials or statements are found to be deficient, lacking in transparency, deceptive, unfair, or misrepresentative of our practices, we may be subject to investigation, enforcement actions by regulators or other adverse consequences.

Our obligations related to data privacy and security are quickly changing in an increasingly stringent fashion, creating some uncertainty as to the effective future legal framework. Additionally, these obligations may be subject to differing applications and interpretations, which may be inconsistent or conflict among jurisdictions. Preparing for and complying with these obligations requires significant resources and may necessitate changes to our information technologies, systems, and practices and to those of any third parties that process personal data on our behalf. Although we endeavor to comply with all applicable data privacy and security obligations, we may at times fail (or be perceived to have failed) to do so. Moreover, despite our efforts, our personnel or third parties upon whom we rely may fail to comply with such obligations, which could negatively impact our business operations and compliance posture. For example, any failure by a third-party processor to comply with applicable law, regulations, or contractual obligations could result in adverse effects, including inability to or interruption in our ability to operate our business and proceedings against us by governmental entities or others.

If we fail, or are perceived to have failed, to address or comply with data privacy and security obligations, we could face significant consequences. These consequences may include, but are not limited to government enforcement actions (which could include civil, criminal and administrative penalties), private litigation, and/or adverse publicity, additional reporting requirements and/or oversight, bans on processing personal data, orders to destroy or not use personal data, imprisonment of company officials.

Moreover, clinical trial subjects, employees and other individuals about whom we or our potential collaborators obtain personal information, as well as the providers who share this information with us, may limit our ability to collect, use and disclose the information. Any of these events could have a material adverse effect on our reputation, business, or financial condition, including but not limited to interruptions or stoppages in our business operations (including, as relevant, clinical trials), inability to process personal data or to operate in certain jurisdictions, limited ability to develop or commercialize our products, expenditure of time and resources to defend any claim or inquiry, adverse publicity, or revision or restructuring of our operations.

We are subject to other laws and regulations governing our international operations, including regulations administered by the governments of the United States, and authorities in the European Union, including applicable export control regulations, economic sanctions on countries and persons, customs requirements and currency exchange regulations, collectively referred to as the trade control laws.

The Foreign Corrupt Practices Act, or FCPA, prohibits any U.S. individual or business from paying, offering, authorizing payment or offering of anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with certain accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations.

Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular challenges in the biopharmaceutical industry, because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered foreign officials. Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA enforcement actions.

There is no assurance that we will be effective in ensuring our compliance with all applicable anti-corruption laws, including the FCPA, the Swiss anti-corruption laws or other legal requirements, including trade control laws. If we are not in compliance with the FCPA, the Swiss anti-corruption laws and other anti-corruption laws or trade control laws, we may be subject to criminal and civil penalties, disgorgement and other sanctions and remedial measures, and legal expenses, which could have an adverse impact on our business, financial condition, results of operations and liquidity. Likewise, any investigation of any potential violations of the FCPA, the Swiss anti-corruption laws, other anti-corruption laws or trade control laws by U.S. or other authorities could also have an adverse impact on our reputation, our business, results of operations and financial condition.

In addition, changes in our products and product candidates or changes in applicable export or import laws and regulations may create delays in the introduction or provision of our products and product candidates in other jurisdictions, prevent others from using our products and product candidates or, in some cases, prevent the export or import of our products and product candidates to certain countries, governments or persons altogether. Any limitation on our ability to export or provide our products and product candidates could adversely affect our business, financial condition and results of operations.

Moreover, a growing number of investors, regulators, self-regulatory organizations and other stakeholders have expressed an interest in Environmental, Social and Corporate Governance, or ESG, matters, and are requiring more robust ESG disclosures. The related legislative landscape in Switzerland and in the EU has been evolving accordingly. According to new provisions in the Swiss Code of Obligations that became effective on 1 January 2022, publicly listed companies exceeding, together with the Swiss and foreign undertakings they control, certain thresholds must each year, as of the financial year beginning on 1 January 2023, prepare a report on non-financial matters. The report must cover environmental matters, in particular the CO2 goals, social issues, employee-related issues, respect for human rights and combating corruption. The report must contain the information required to understand the state of the company, the performance and results of its business, and the effects of its activity on these non-financial matters. The relevant thresholds are: At least 500 full-time equivalent positions on annual average in two successive financial years and exceeding one of the following thresholds in two successive financial years (ii) balance sheet total of CHF 20 million or sales revenue of CHF 40 million. In addition, under Switzerland’s legislation regarding the due diligence and transparency in relation to conflict minerals and metals and child labor in the supply chain, we may in the future be required to establish (1) a supply chain policy on conflict minerals and metals and child labor, (2) a supply chain traceability system, (3) as an early warning mechanism for risk identification, a reporting procedure that allows interested parties to raise reasonable concerns about the existence of a potential or actual adverse impact related to conflict minerals and metals and child labor, and (4) a risk management plan which identifies and assesses the risks in the supply chain according to the likelihood of occurrence and severity of adverse impacts and eliminates, prevents or minimizes such risks on that basis. If the new due diligence obligations will apply to us in the future, we will be required to publish an annual report regarding compliance with our conflict minerals and metals and child labor due diligence obligations.

In the EU, for example, EU Directive No 2464/2022 on Corporate Sustainability Reporting, or CSRD, was adopted and entered into force on 5 January 2023, amending the current EU Accounting Directive No 2013/34. The CSRD introduces new mandatory reporting obligations that will require in-scope companies to publish audited sustainability information. The CSRD is supplemented by EU Delegated Regulation No 2023/2772 which establishes the first set of European Sustainability Reporting Standards, or ESRS, which are applicable to in-scope EU entities. Further reporting standards are due to be adopted by June 2026, including for in-scope non-EU entities.

The CSRD and ESRS require certain mandatory disclosures, as well as disclosures of certain "material" sustainability matters in the company's own operations, those of their subsidiaries and those of their value chain. Like the Swiss legislation the identification of material sustainability matters in the CSRD also requires a "double materiality" assessment. This means that in-scope entities will have to assess both financial materiality (i.e., sustainability matters which generate risks or opportunities that affect, or could reasonably be expected to affect, the company's financial position, financial performance, cash flows, access to finance or cost of capital over the short-, medium- or long-term) and impact materiality (i.e., the company's material actual or potential, positive or negative impacts on people or the environment over the short-medium and long-term). Sustainability matters are material if they satisfy one or both of these materiality tests.

The CSRD applies to entities with securities admitted to trading on an EU-regulated market, as well as large EU companies, EU parents of a "large group", and to listed EU small or medium-sized enterprises, amongst others. It will also apply to non-EU companies that have a certain threshold of EU-generated turnover and an in-scope EU subsidiary or EU branch meeting the turnover thresholds. Companies subject to the CSRD are required to fulfil their reporting obligations in accordance with a staggered timeline depending on the category of company. The first reports are expected in 2025 for the 2024 financial year, predominantly for entities with securities admitted to trading on an EU-regulated market, and in 2026 for the 2025 financial year for many other EU companies (including EU subsidiaries of non-EU parents) that are not listed on an EU-regulated market but meet the relevant threshold tests.

In response to new ESG initiatives and regulations we may voluntarily elect, or be required, to adopt strategies, policies, or procedures related to ESG matters and report on these. Reporting on ESG goals and objectives may cause us to expend significant capital and human resources, and could divert management’s attention from central operational matters. Reports could also lead to the disclosure of information that which may have a negative impact on our operations and reputation which may lead to additional exposure. Failure to accurately comply with any ESG reporting obligations may result in enforcement actions, sanctions, reputational harm or private litigation.

We have relied upon and plan to continue to rely upon third parties, including independent clinical investigators and third-party CROs mandated by us or by our partners, to conduct our preclinical studies and clinical trials and to monitor and manage data for our ongoing preclinical and clinical programs. We rely on these parties for execution of our preclinical studies and clinical trials, and control only certain aspects of their activities. Nevertheless, we are responsible for ensuring that each of our studies and trials is conducted in accordance with the applicable protocol, legal and regulatory requirements and scientific standards, and our reliance on these third parties does not relieve us of our regulatory responsibilities. We and our third party contractors and CROs are required to comply with GCP requirements, which are regulations and guidelines enforced by the FDA, the EMA and comparable foreign regulatory authorities for all of our products in clinical development. Regulatory authorities enforce these GCPs through periodic inspections of trial sponsors, principal investigators and trial sites. If we, our investigators or any of our CROs fail to comply with applicable GCPs, the clinical data generated in our clinical trials may be deemed unreliable and the FDA, the EMA or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We cannot assure you that upon inspection by a given regulatory authority, such regulatory authority will determine that any of our clinical trials comply with GCP regulations. In addition, our clinical trials must be conducted with product produced under cGMP regulations. Our failure to comply with these regulations may require us to repeat clinical trials, which would delay the regulatory approval process.

Further, these investigators and CROs are not our employees and we will not be able to control, other than by contract, the amount of resources, including time, which they devote to our product candidates and clinical trials. If independent investigators or CROs fail to devote sufficient resources to the development of our product candidates, or if their performance is substandard, it may delay or compromise the prospects for approval and commercialization of any product candidates that we develop. In addition, the use of third-party service providers requires us to disclose our proprietary information to these parties, which could increase the risk that this information will be misappropriated.

Our CROs have the right to terminate their agreements with us in the event of an uncured material breach. In addition, some of our CROs have an ability to terminate their respective agreements with us if it can be reasonably demonstrated that the safety of the subjects participating in our clinical trials warrants such termination, if we make a general assignment for the benefit of our creditors or if we are liquidated.

We also face the risk of potential infringement, unauthorized disclosure, misappropriation or other violation of our intellectual property by our third party contractors or CROs, which may reduce our trade secret protection and allow our potential competitors or other third parties to access and exploit our proprietary technology. Our third party contractors or CROs also may use our proprietary information and intellectual property in such a way as to invite litigation or other intellectual property-related proceedings that could jeopardize or invalidate our proprietary information and intellectual property.

For more information regarding our intellectual property, see “Risk Factors—Risks Related to Intellectual Property.”

There are a limited number of third-party service providers that specialize or have the expertise required to achieve our business objectives. If any of our relationships with these third-party CROs or clinical investigators terminate, we may not be able to enter into arrangements with alternative CROs or investigators or to do so on commercially reasonable terms. Switching or adding additional CROs (or investigators) involves additional cost and requires management time and focus. In addition, there is a natural transition period when a new CRO commences work. As a result, delays occur, which can materially impact our ability to meet our desired clinical development timelines. Though we carefully manage our relationships with our CROs, there can be no assurance that we will not encounter similar challenges or delays in the future or that these delays or challenges will not have a material adverse impact on our business, financial condition and prospects.

We are, and expect to continue to be, dependent on partnerships with partners relating to the development and commercialization of our existing and future research programs and product candidates.

We currently have collaborative research relationships with the University of Bern for MP0533, Orano Med for Radio-DARPin therapies, University of Freiburg for Radio-DARPin therapies and with Novartis, primarily for Radio-DARPin therapies. We have had and will continue to have discussions on potential partnering opportunities with various pharmaceutical companies. If we fail to enter into or maintain collaborations on reasonable terms or at all, our ability to develop our existing or future research programs and product candidates could be delayed, the commercial potential of our products could change and our costs of development and commercialization could increase. Furthermore, we may find that our programs require the use of intellectual property rights and other proprietary rights held by third parties, and the growth of our business may depend in part on our ability to acquire, in-license or use these intellectual property and other proprietary rights.

Our dependence on collaborative partners subjects us to a number of risks, including, but not limited to, the following:

•we may not be able to control the amount and timing of resources that the collaboration partner devotes to our research programs and product candidates;

•for collaboration agreements where we are solely or partially responsible for funding development expenses through a defined milestone event, the payments we receive from the collaboration partner may not be sufficient to cover the expenses we have or would need to incur in order to achieve that milestone event;

•we may be required to relinquish significant rights, including intellectual property or other proprietary rights, marketing and distribution rights;

•our anticipated payments under any partnership agreement (e.g., royalty payments for licensed products) may not materialize;

•we rely on the information and data received from third parties regarding their research programs and product candidates and will not have control of the process conducted by the third party in gathering and composing such data and information.

•if rights to develop and commercialize our product candidates subject to collaborations revert to us for any reason (for example MP0310 and abicipar), we may not have sufficient financial resources to develop such product candidates, which may result in us failing to recognize any value from our investments in developing such product candidates and/or requiring us to divert our resources elsewhere;

•a collaborative partner may decide not to pursue, or discontinue the collaborative development of, our product candidates;

•a collaborative partner may develop a competing product either by itself or in collaboration with others, including one or more of our competitors;

•our collaborative partners' willingness or ability to complete their obligations under our partnership arrangements may be adversely affected by business combinations or significant changes in a collaborative partner's business strategy;

•we may experience delays in, or increases in the costs of, the development of our research programs and product candidates due to the termination or expiration of collaborative research and development arrangements;

•we may have disagreements with collaborative partners, including disagreements over proprietary rights, contract interpretation or the preferred course of development, that might cause delays or termination of the research, development or commercialization of product candidates, might lead to additional responsibilities for us with respect to product candidates, or might result in litigation or arbitration, any of which would be time-consuming and expensive;

•collaborative partners may not properly maintain, enforce or defend our intellectual property rights or other proprietary information or may such use proprietary information in such a way as to invite litigation or other intellectual property-related proceedings that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation; or

•collaborative partners may infringe, misappropriate or otherwise violate the intellectual property or other proprietary rights of third parties, which may expose us to litigation and potential liability, and collaborators may also allege that we are liable for potential infringement, misappropriation or other violations of third-party intellectual property or proprietary rights during the research and development work for the collaboration.

We face significant competition in seeking appropriate collaborative partners. Our ability to reach a definitive agreement for a partnership will depend, among other things, upon an assessment of the collaborator's resources and expertise, the terms and conditions of the proposed partnership and the proposed collaborator's evaluation of a number of factors. These factors may include the design or results of clinical trials, the likelihood of regulatory approval, the potential market for the subject product candidate, the costs and complexities of manufacturing and delivering such product candidate to patients, the potential of competing products, the existence of uncertainty with respect to our ownership of technology, which can exist if there is a challenge to such ownership regardless of the merits of the challenge and industry and market conditions generally. The collaborator may also consider alternative product candidates or technologies for similar indications that may be available to collaborate on and whether such a partnership could be more attractive than the one with us.

We may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. If we are unable to do so, we may have to curtail the development of the product candidate for which we are seeking to collaborate, reduce or delay its development program or one or more of our other development programs, delay its potential commercialization or reduce the scope of any sales or marketing activities or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to increase our expenditures to fund development or commercialization activities on our own, we may need to obtain additional capital, which may not be available to us on acceptable terms or at all. If we do not have sufficient funds, we may not be able to further develop product candidates or bring them to market and generate product revenue.

We do not currently have the infrastructure or capability internally to manufacture our product candidates for use in the conduct of our clinical studies or for commercial supply, if our products are approved. Instead, we rely on, and expect to continue to rely on CMOs. We currently rely mainly on a few CMOs for the manufacturing of our product candidate materials. Any replacement of our CMOs could require significant effort and expertise because there may be a limited number of qualified CMOs. Reliance on third-party providers may expose us to more risk than if we were to manufacture our product candidates ourselves. We are dependent on our CMOs for the production of our product candidates in accordance with relevant regulations (such as cGMP), which includes, among other things, quality control, quality assurance and the maintenance of records and documentation. Moreover, many of the third parties with whom we contract may also have relationships with other commercial entities, including our competitors, for whom they may also be conducting product development activities that could harm our competitive position.

If we were to experience an unexpected delay in receiving required target material or loss of supply of or if any supplier were unable to meet our demand for any of our product candidates, we could experience delays in our research or planned clinical studies or commercialization. We could be unable to find alternative suppliers of acceptable quality, in the appropriate volumes and at an acceptable cost. Moreover, our suppliers are subject to strict manufacturing requirements and rigorous testing requirements, which could limit or delay production. The long transition periods necessary to switch manufacturers and suppliers, if necessary, would significantly delay our clinical studies and the commercialization of our products, if approved, which would adversely affect our business and results of operation.

In complying with the manufacturing regulations of the FDA, the EMA and other comparable foreign authorities, we and our third-party suppliers must spend significant time, money and effort in the areas of design and development, testing, production, record-keeping and quality control to assure that the products meet applicable specifications and other regulatory requirements. The failure to comply with these requirements could result in an enforcement action against our CMOs and subsequently against us, including the seizure of products and shutting down of production. We and any of these third-party suppliers may also be subject to audits by the FDA, the EMA or other comparable foreign authorities. If any of our third-party suppliers fails to comply with cGMP or other applicable manufacturing regulations, our ability to develop and commercialize the products could suffer significant interruptions. For example, we have faced and may face in the future bioburden during drug substance production campaigns or particles in drug product preparations at our CMOs which led or may lead to regulatory actions, including from the FDA. While we and our partners endeavor to maintain appropriate backup supply with respect to our product candidates, and not all such bioburden or particles result in regulatory action or delays, we cannot assure that any such issues would not result in delays in our clinical trials or product development or other adverse impacts on our business.

We face risks inherent in relying on our CMOs, as any disruption, such as a fire, natural hazards or vandalism at any such CMO could significantly interrupt our manufacturing capability. Our CMOs currently do not have alternative production plans in place or disaster-recovery facilities available. In case of a disruption, we will have to establish alternative manufacturing sources. This would require substantial capital on our part, which we may not be able to obtain on commercially acceptable terms or at all. Additionally, we would likely experience months of manufacturing delays as the CMO builds or locates replacement facilities and seeks and obtains necessary regulatory approvals. If this occurs, we will be unable to satisfy manufacturing needs on a timely basis, if at all.

The manufacturing of all of our product candidates requires using cells which are stored in a cell bank. We have one master cell bank for each product manufactured in accordance with cGMP. Working cell banks have not yet been manufactured. Half of each master cell bank is stored at a separate site so that in case of a catastrophic event at one site we believe sufficient vials of the master cell banks are left at the alternative storage site to continue manufacturing. We believe sufficient working cell banks could be produced from the vials of the master cell bank stored at a given site to assure product supply for the future. However, it is possible that we could lose multiple cell banks and have our manufacturing significantly impacted by the need to replace these cell banks, which could materially adversely affect our business, prospects, financial condition and results of operations.

We do not and will not have access to all information regarding the product candidates being developed and potentially commercialized by Novartis, including potentially material information about clinical trial design and execution, safety reports from clinical trials, spontaneous safety reports if the product is later approved and marketed, regulatory affairs, process development, manufacturing, marketing and other areas known by Novartis. In addition, we have confidentiality obligations under our agreement with Novartis. Thus, our ability to keep our shareholders informed about the status of product candidates under our collaboration will be limited by the degree to which Novartis keeps us informed and allows us to disclose such information to the public.

We rely on our licensees to manufacture, fund and conduct the clinical development and commercialization of product candidates, and our licensees have complete control over such activities. Our ability to generate revenue in the near term will depend primarily on the successful development, regulatory approval, marketing and commercialization of product candidates by our licensees. Such success is subject to significant uncertainty, and we have limited control over the manufacturing processes of such product candidates as well as the resources, time and effort that licensees may devote to such product candidates. Any of several events or factors could have a material adverse effect on our ability to generate revenue from our licensee’s potential commercialization of product candidates.

In addition, our licensees have the right to make decisions regarding the development and commercialization of product candidates under the collaborations without consulting us and may make decisions with which we do not agree.

For example, in April 2022, Amgen, our collaboration partner for MP0310 (AMG 506), informed us of its decision to return global rights of MP0310 to us following a strategic pipeline review and in January 2024, Novartis, our collaboration partner for ensovibep, informed us of its decision to return the global rights for ensovibep to us following the end of COVID-19 pandemic. Conflicts between our licensees and us may arise if there is a dispute about the progress of the clinical development of a product candidate, the achievement and payment of a milestone amount or the ownership of intellectual property developed during the course of our collaboration agreements. If any of our licenses terminate with our licensees, it may be necessary for us to assume responsibility at our own expense for the development of the applicable product candidates. In that event, we would likely be required to limit the size and scope of one or more of our programs or increase our expenditures and seek additional funding, which may not be available on acceptable terms or at all, which would materially adversely affect our business, financial condition and results of operations.

Our commercial success depends in part on obtaining and maintaining patents and other forms of intellectual property rights for our product candidates, methods used to manufacture those products and methods for treating patients using those products, or on licensing in such rights. Failure to obtain, maintain, enforce, protect or extend adequate patent and other intellectual property rights could adversely affect our ability to develop and market our products and product candidates or pursue collaborations with partners for our product candidates.

We cannot be certain that patents will be issued or granted with respect to applications that are currently pending, or that issued or granted patents will not later be found to be invalid or unenforceable. The patent position of biopharmaceutical companies is generally uncertain because it involves complex legal and factual considerations, and has been the subject of much litigation in recent years. The standards applied by the United States Patent and Trademark Office, or USPTO, the European Patent Office, or EPO, and other foreign patent offices in granting patents are not always identical or applied uniformly or predictably. For example, there is no uniform worldwide policy regarding patentable subject matter or the scope of claims allowable in biopharmaceutical patents. Consequently, patents may not issue from our pending patent applications or, if issued, patents may vary in scope depending on the jurisdiction. As such, we do not know the degree of future protection that we will have on our proprietary products and technology in the various jurisdictions. The scope of patent protection that the USPTO, the EPO and other foreign patent offices will grant with respect to the DARPin product candidates in our product pipeline is uncertain. It is possible that the USPTO, the EPO and other foreign patent offices will not allow broad claims that cover DARPin product candidates closely related to our product candidates or to the specific protein building blocks. As a result, upon receipt of EMA or FDA approval, competitors may be free to market other products almost identical to ours, thereby decreasing our market share.

The patent prosecution process is expensive, time-consuming and complex, and we and our current or future licensors, licensees or collaboration partners may not be able to prepare, file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that we or our licensors, licensees or collaboration partners will fail to identify patentable aspects of inventions made in the course of development and commercialization activities before it is too late to obtain patent protection for them. Although we enter into non-disclosure and confidentiality agreements with parties who have access to confidential or patentable aspects of our research and development output, such as our employees, collaborators, CROs, contract manufacturers, consultants, advisors and other third parties, any of these parties may breach the agreements and disclose such output before a patent application is filed, thereby jeopardizing our ability to seek patent protection.

Further, the issuance, scope, validity, enforceability and commercial value of our and our current or future licensors’, licensees' or collaboration partners’ patent rights are highly uncertain. Our and our licensors’ pending and future patent applications may not result in patents being issued that protect our technology or products, in whole or in part, or that effectively prevent others from commercializing competitive technologies and products. Moreover, in some circumstances, we may not have the right to control the preparation, filing, prosecution and maintenance of the licensed patent applications or other intellectual property, or to maintain the patents, or may not have the first right to enforce the intellectual property. We may need to enter into new license or royalty agreements, covering technology that we license from or license to third parties or have developed in collaboration with our collaboration partners and are reliant on patent procurement activities of our licensors, licensees or collaboration partners. Therefore, we may not be able to adequately influence the patent prosecution or enforcement of these patents and patent applications, or prevent inadvertent lapses of coverage due to failure to pay maintenance fees and we cannot be certain that these patents and patent applications will be prepared, filed, prosecuted, maintained, enforced and defended in a manner consistent with the best interests of our business and that does not compromise the patent rights. If our current or future licensors, licensees or collaboration partners fail to obtain, maintain, protect or enforce such patents and other intellectual property rights, such rights may be reduced or lost. If our licensors, licensees or collaboration partners are not fully cooperative or disagree with us as to the preparation, filing, prosecution, maintenance, defense or enforcement of any licensed patent rights, such patent rights could be compromised. The patent examination process may require us or our licensors, licensees or collaboration partners to narrow the scope of the claims of our or our licensors’, licensees’ or collaboration partners’ pending and future patent applications, which may limit the scope of patent protection that may be obtained. We cannot assure you that all of the potentially relevant prior art relating to our patents and patent applications has been found. If such prior art exists, it may invalidate patents in whole or in part or prevent patents from issuing from pending patent applications. Even if patents do successfully issue and even if such patents cover our product candidates, third parties may initiate an opposition, interference, re-examination, post-grant review, inter partes review, nullification, revocation, derivation, or other actions in court or before patent offices challenging the validity, enforceability or scope of such patents, which may result in the patent claims being narrowed, invalidated, or held unenforceable. Such proceedings have a higher impact in the biopharmaceutical industry than in other industries, given that biopharmaceutical products are often protected by only one or few patents. Our and our licensors’, licensees’ or collaboration partners’ patent applications cannot be enforced against third parties practicing the technology claimed in such applications unless and until a patent issues from such applications, and then only to the extent the issued claims cover the practiced technology. An adverse determination in any such proceeding could reduce the scope of, invalidate, or render unenforceable our patent rights, and allow third parties to commercialize our technology or products and compete directly with us, without payment to us. Such proceedings also may result in substantial cost and require significant time from our scientists and management, even if the eventual outcome is favorable to us.

Moreover, the coverage claimed in a patent application can be significantly reduced before the patent is issued, and the issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability. Even if our patent applications or those of our licensors, licensees or collaboration partners issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors or other third parties from competing with us, or otherwise provide us with any competitive advantage. Any patents may be challenged, narrowed, circumvented or invalidated by third parties. Consequently, we do not know whether any of our DARPin platform advances or product candidates will be protectable or remain protected by valid and enforceable patents. In addition, our competitors or other third parties may be able to circumvent our patents by developing similar or alternative technologies or products in a non-infringing manner.

In addition, publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications are confidential for a period of time after filing, and some remain so until issued. Therefore, we cannot be certain that we or our licensors, licensees or collaborators were the first to make the inventions claimed in any patent application, or were the first to file any patent application related to a product candidate. Furthermore, as to the United States, if third parties have filed such patent applications on or before March 15, 2013, an interference proceeding can be initiated by such third parties to determine who was the first to invent any of the subject matter covered by the patent claims of our applications. If third parties have filed such applications after March 15, 2013, a derivation proceeding can be initiated by such third parties to determine whether our invention was derived from theirs. Even where we have a valid and enforceable patent, we may not be able to exclude others from practicing our invention where the other party can show that they used the invention in commerce before our filing date, or if the other party is able to obtain a compulsory license.

Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such product candidates are commercialized. As a result, our intellectual property may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours, including generic versions of such products. Moreover, it is possible that some future patents and patent applications owned or in-licensed by us may be co-owned with third parties, including our collaboration partners and other third parties with whom we conduct research and development. If we are unable to obtain an exclusive license to any such third party co-owners’ interest in such patents or patent applications, such co-owners may be able to license their rights to other third parties, including our competitors, and our competitors could market competing products and technology. In addition, we may need the cooperation of any such co-owners of our patents in order to enforce such patents against third parties, and such cooperation may not be provided to us.

Furthermore, it is possible that some future patents and patent applications owned or in-licensed by us may be subject to a reservation of rights by one or more third parties. For example, this may happen if the research resulting in certain of our owned or in-licensed patent rights and technology was funded in part by the U.S. government. As a result, the government may have certain rights, or march-in rights, to such patent rights and technology. When new technologies are developed with government funding, the government generally obtains certain rights in any resulting patents, including a non-exclusive license authorizing the government to use the invention for noncommercial purposes. These rights may permit the government to disclose our confidential information to third parties and to exercise march-in rights to use or allow third parties to use our licensed technology. The government can exercise its march-in rights if it determines that action is necessary because we fail to achieve practical application of the government-funded technology, because action is necessary to alleviate health or safety needs, to meet requirements of federal regulations, or to give preference to U.S. industry. In addition, our rights in such inventions may be subject to certain requirements to manufacture products embodying such inventions in the United States. Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations, and prospects.

To protect our competitive position, we or our licensors or collaboration partners may from time to time need to resort to litigation in order to enforce or defend any patents or other intellectual property rights owned by or licensed to us, or to determine or challenge the scope or validity of patents or other intellectual property rights of third parties.

Enforcement of intellectual property rights is difficult, unpredictable and expensive, and many of our or our licensors’ or collaboration partners’ adversaries in these proceedings may have the ability to dedicate substantially greater resources to prosecuting these legal actions than we or our licensors or collaboration partners can. Accordingly, despite our or our licensors' or collaboration partners’ efforts, we or our licensors or collaboration partners may not be able to prevent third parties from infringing upon, misappropriating or otherwise violating intellectual property rights we own or control, particularly in countries where the laws may not protect those rights as fully as in the European Union and the United States. We may fail in enforcing our rights, in which case our competitors may be permitted to use our technology without being required to pay us any license fees. In addition, litigation involving our patents carries the risk that one or more of our patents will be held invalid (in whole or in part, on a claim-by-claim basis) or unenforceable. Such an adverse court ruling could allow third parties to commercialize our products or use our DARPin technology, and then compete directly with us, without payment to us.

If we or one of our licensors or collaboration partners were to initiate legal proceedings against a third party to enforce a patent covering one of our product candidates or our technology, including our DARPin technology, the defendant could counterclaim that our patent is invalid or unenforceable. In patent litigation in the United States and Europe, defendant counterclaims alleging invalidity or unenforceability are commonplace. Third parties could also raise challenges to the validity of patent claims before administrative bodies in the United States, Europe or other foreign jurisdictions, even outside the context of litigation. Such mechanisms include re-examination, post-grant review, inter partes review, interference proceedings, derivation proceedings and equivalent proceedings in foreign jurisdictions (e.g., opposition proceedings). Such proceedings could result in the revocation of, cancellation of or amendment to our patent claims in such a way that they no longer cover our technology or DARPin platform, or any product candidates that we may develop. A claim for a validity challenge may be based on failure to meet any of several statutory requirements, including lack of novelty, obviousness or non-enablement. A claim for unenforceability could involve an allegation that someone connected with prosecution of the patent withheld relevant information from or made a misleading statement to the USPTO, the EPO or other patent offices during prosecution. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to the validity of our issued patents, for example, we cannot be certain that there is no invalidating prior art, of which we, our licensors or collaboration partners and the patent examiner were unaware during prosecution. If a third party were to prevail on a legal assertion of invalidity or unenforceability, we would lose part or all of the patent protection afforded by the affected patent. Such a loss of patent protection could have a material adverse impact on our business. Further, litigation could result in substantial costs and diversion of management resources, and reputational harm, regardless of the outcome, which could harm our business and financial results.

Our success depends, in part, on our ability to operate without infringing the patents and other proprietary intellectual property rights of third parties. This is generally referred to as having the “freedom to operate.” The biotechnology and pharmaceutical industries in which we plan to operate are subject to frequent and extensive litigation regarding patents and other intellectual property rights. In addition, companies producing therapeutics in the oncology and virology fields have employed intellectual property litigation as a means to gain an advantage over their competitors.

As a result, we may be required to defend against claims of intellectual property infringement, misappropriation or other violation that may be asserted by third parties against us and, if the outcome of any such litigation is adverse to us, it may affect our ability to compete effectively.

Our competitive position may suffer if patents issued to third parties or other third-party intellectual property rights cover our products or elements thereof, our manufacture or uses relevant to our products or development plans, the targets of our product candidates, or other attributes of our product candidates or our technology. In such cases, we may not be in a position to develop or commercialize the applicable products or product candidates unless we successfully pursue litigation to nullify or invalidate the third-party intellectual property right concerned, or enter into a license agreement with the intellectual property right holder, which may not be available on commercially reasonable terms, or at all. In the event that a relevant patent has not expired at the time of approval of such product candidate and the patent owner were to bring an infringement action against us, we may have to argue that our product, its manufacture, importation or use does not infringe, misappropriate or otherwise violate a valid claim of the patent in question. Alternatively, if we were to challenge the validity of any issued U.S. patent in court, we would need to overcome a statutory presumption of validity that attaches to every U.S. patent. This means that in order to prevail, we would need to present clear and convincing evidence as to the invalidity of the patent's claims. There is no assurance that a court would find in our favor on questions of infringement or validity. In the event that a patent is successfully asserted against us such that the patent is found to be valid and enforceable and infringed by our product, unless we obtain a license to such a patent, which may not be available on commercially reasonable terms or at all, we could be prevented from continuing to develop or commercialize our product. Similarly, the targets for certain of our product candidates have also been the subject of research by other companies, which have filed patent applications or own issued patents on aspects related to the targets or their uses. There can be no assurance that any such patents will not be asserted against us or that we will not need to seek licenses from such third parties. We may not be able to secure such licenses on acceptable terms, if at all, and any such litigation would be costly and time-consuming.

It is also possible that we failed to identify relevant patents or applications. For example, certain U.S. applications filed after November 29, 2000 that will not be filed outside the United States may remain confidential until patents issue. In general, patent applications in the United States and elsewhere are published approximately 18 months after the earliest filing from which priority is claimed, with such earliest filing date being commonly referred to as the priority date. Therefore, patent applications covering our products or platform technology could have been filed by others without our knowledge. Furthermore, we operate in a highly competitive field, and given our limited resources, it is unreasonable to monitor all patent applications purporting to gain broad coverage in the areas in which we are active. Additionally, claims in pending patent applications which have been published can, subject to certain limitations, be later amended in a manner that could cover our platform technologies, our products or the use of our products.

Third-party intellectual property right holders, including our competitors, may actively bring infringement, misappropriation or other claims against us. We may not be able to successfully settle or otherwise resolve such claims. If we are unable to successfully settle future claims on terms acceptable to us, we may be required to engage in or continue costly, unpredictable and time-consuming litigation and may be prevented from or experience substantial delays in marketing our products.

If we fail in any such dispute, in addition to being forced to pay damages, we or our licensees may be temporarily or permanently prohibited from commercializing any of our product candidates that are held to be infringing, misappropriating or violating any third-party intellectual property rights.

We might also be forced to redesign product candidates so that we no longer infringe, misappropriate or otherwise violate third-party intellectual property rights, which may result in significant cost or delay to us or be technically infeasible, or to seek a license to any such third-party intellectual property rights that we are found to infringe, misappropriate or otherwise violate, which license may not be available on commercially reasonable terms, or at all. Even if we or our licensors or collaboration partners obtain a license, it may be non-exclusive, thereby giving our competitors access to the same technologies licensed to us or our licensors or collaboration partners, and it could require us or our licensors or collaboration partners to make substantial royalty and other payments. In addition, we could be found liable for monetary damages, including treble damages and attorneys' fees, if we are found to have willfully infringed a patent. Any of these events, even if we were to ultimately prevail, could require us to divert substantial financial and management resources that we would otherwise be able to devote to our business.

Our involvement in litigation, and in any interference, derivation, reexamination, inter partes review, post grant review, opposition or other post-grant proceedings or other intellectual property proceedings inside and outside of the European Union or the United States, even if resolved in our favor, may cause us to incur significant expenses, distract our technical and management personnel from their normal responsibilities and cause substantial delays in marketing our products. In addition, there could be public announcements of the results of hearings, motions, other interim proceedings or developments, or of final verdicts and if securities analysts or investors perceive these results to be negative, this could have a substantial adverse effect on our share price. Such litigation or proceedings could substantially increase our operating losses and reduce our resources available for development activities. We may not have sufficient financial or other resources to adequately conduct such litigation or proceedings. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their substantially greater financial resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could have an adverse effect on our ability to compete in the marketplace.

In addition, if the breadth or strength of protection provided by our or our licensors’ or collaboration partners’ patents and patent applications is challenged or threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations and prospects.

We rely upon licenses to certain patent rights and other intellectual property from third parties that are important or necessary to the development of our product candidates. We may also need to obtain additional licenses to advance the development and commercialization of any product candidates we may develop. Additionally, we have in the past collaborated and may in the future collaborate with U.S. and/or European academic institutions to accelerate our preclinical research or development under written agreements with these institutions. In some instances, these institutions provide us with an option to negotiate a license to any of the institution’s rights in technology resulting from the collaboration. Regardless of such option, we may be unable to negotiate a license within the specified timeframe or under terms that are acceptable to us. If we are unable to do so, the institution may offer the intellectual property rights to other parties, potentially blocking our ability to pursue our applicable product candidate or program.

Our current license and collaborations agreements also impose, and we expect that future agreements will likely impose various reporting, prosecution, diligence, fee payment, royalty and other obligations on us. If there is any conflict, dispute, disagreement or issue of non-performance between us and our licensing or collaboration partners regarding our rights or obligations under the agreements, including any such conflict, dispute or disagreement arising from our alleged failure to satisfy payment obligations under any such agreement, we may owe damages, the counterparty may have a right to terminate the affected agreement, and our and our licensees' ability to utilize the affected intellectual property in drug discovery and development efforts, and our ability to enter into collaboration or marketing agreements for an affected product candidate, may be adversely affected. Our business could also suffer if a licensor or collaborator fails to abide by the terms of the agreement, if any licensed patents or other rights are found to be invalid or unenforceable, or if we are unable to enter into necessary licenses on acceptable terms or at all. Any of these events could have a material adverse effect on our competitive position, business, financial conditions, results of operations, and prospects. For more information regarding our license and collaboration agreements, see “Item 4.B — Business—License and Collaboration Agreements.”

In addition, we may not have the right to control the preparation, filing, prosecution, maintenance, enforcement and defense of patents and patent applications covering the technology that we license from third parties. Therefore, we cannot be certain that these patents and patent applications will be prepared, filed, prosecuted, maintained, enforced and defended in a manner consistent with the best interests of our business. If our current or future licensors fail to prosecute, maintain, enforce and defend such patents, or lose rights to those patents or patent applications, the rights we have licensed may be reduced or eliminated, and our right to develop and commercialize any of our products that are subject of such licensed rights could be adversely affected.

Our current or future licensors may have relied on third party consultants or collaborators or on funds from third parties such that our licensors are not the sole and exclusive owners of the patents we in-licensed. This could have a material adverse effect on our competitive position, business, financial conditions, results of operations and prospects.

Because our programs may require the use of proprietary rights held by third parties, the growth of our business may depend in part on our ability to acquire, in-license, maintain or use these proprietary rights. We may be unable to acquire or in-license, on reasonable terms or at all, any compositions, methods of use, processes, or other third-party intellectual property rights from third parties that we identify as necessary for our product candidates. The licensing and acquisition of third-party intellectual property rights is a competitive area, and a number of more established companies may pursue strategies to license or acquire third-party intellectual property rights that we may consider attractive. These established companies may have a competitive advantage over us due to their size, cash resources and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment. If we are unable to successfully obtain a license to third-party intellectual property rights necessary for the development of a product candidate or program, we may have to abandon development of that product candidate or program and our business and financial condition could suffer.

If in the future we do undertake any acquisitions, the process of integrating an acquired business, technology, service, products or product candidates into our business may result in unforeseen operating difficulties and expenditures, including diversions of resources and management’s attention from our core business, or any acquired intellectual property may be subject to claims of invalidity or unenforceability or held to be invalid.

In addition, we may fail to retain key executives and employees of the companies we acquire, which may reduce the value of the acquisition or give rise to additional integration costs. Future acquisitions could result in additional issuances of equity securities that would dilute the ownership of existing shareholders. Future acquisitions could also result in the incurrence of debt, actual or contingent liabilities or the amortization of expenses related to other intangible assets, any of which could adversely affect our operating results. In addition, we may fail to realize the anticipated benefits of any acquisition. Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations and prospects.

Our registered or unregistered trademarks or trade names may be challenged, infringed, circumvented, declared generic or determined to be infringing on other marks or names. We may not be able to protect or enforce our rights to these trademarks and trade names, which we need to build name recognition among potential partners or customers in our markets of interest. If we are unable to establish name recognition based on our trademarks and trade names, then we may not be able to compete effectively and our business may be adversely affected. If other entities use trademarks similar to ours in different jurisdictions, or have rights senior to ours, it could interfere with our use of our current trademarks throughout the world.

Patents have a limited duration. In the United States, if all maintenance fees are timely paid, the natural expiration of a patent is generally 20 years from its earliest effective U.S. non-provisional filing date. Various extensions may be available, but the life of a patent, and the protection it affords, is limited. Even if patents covering our product candidates, their manufacture, or use are obtained, once the patent life has expired, we may be open to competition from competitive medications, including biosimilar medications or generic versions of such products. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours, at least not long enough to recoup the costs incurred in developing our products.

Depending upon the timing, duration and conditions of FDA marketing approval of our product candidates, one or more of our U.S. patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman Act and similar legislation in the European Union and several other relevant countries around the world. The Hatch-Waxman Act permits a patent term extension of up to five years for a patent covering an approved product as compensation for effective patent term lost during product development and the FDA regulatory review process. The patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent applicable to an approved drug may be extended, and only those claims covering the approved drug, a method for using it, or a method for manufacturing it may be extended. However, we may not receive an extension if we fail to exercise due diligence during the testing phase or regulatory review process, fail to apply within applicable deadlines, fail to apply prior to expiration of relevant patents or otherwise fail to satisfy applicable requirements. Moreover, the length of the extension could be less than we request. If we are unable to obtain patent term extension or the term of any such extension is less than we request, the period during which we can enforce our patent rights for the applicable product will be shortened and our competitors may be able to enter the market with competing products sooner than we expect, and our business, financial condition, results of operations, and prospects could be materially harmed.

The base patents that we had licensed from the University of Zurich in 2004 expired in September 2021 (except for one patent in the United States) and we terminated the license agreement effective October 2021 and the remaining U.S. patent expired in August 2023. Our competitors may be able to utilize the technology claimed in such patents to develop product candidates that compete with ours. This could harm our reputation as being the leader in the DARPin technology, and could have an adverse effect on our competitive position, business, financial conditions, results of operations and prospects.

Filing, prosecuting and defending patents on product candidates in all countries throughout the world would be prohibitively expensive, and the laws of foreign countries may not protect our rights to the same extent as the laws of the United States and the European Union. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States and the European Union, or from selling or importing products made using our inventions in and into all countries outside the United States and the European Union.

We often file our first patent application, or our priority filing, at the EPO or the USPTO. International applications under the Patent Cooperation Treaty, or PCT, are usually filed within twelve months after the priority filing. Based on the PCT filing, national and regional patent applications may be filed in additional jurisdictions where we believe our product candidates may be marketed. We have so far not filed for patent protection in all national and regional jurisdictions where such protection may be available. In addition, we may decide to abandon national and regional patent applications before grant. Finally, the grant proceeding of each national/regional patent is an independent proceeding which may lead to situations in which applications might in some jurisdictions be refused by the relevant patent offices, while granted by others. It is also quite common that depending on the country, the scope of patent protection may vary for the same product candidate or technology.

Competitors may use our or our licensors’ or collaboration partners’ technologies in jurisdictions where we have not obtained patent protection to develop their own products and, further, may export otherwise infringing products to territories where we and our licensors or collaboration partners have patent protection, but enforcement is not as strong as that in the United States and the European Union. These products may compete with our product candidates, and our and our licensors' or collaboration partners' patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

The laws of some jurisdictions do not protect intellectual property rights to the same extent as the laws in the United States and the European Union, and companies have encountered significant difficulties in protecting and defending such rights in such jurisdictions. If we or our licensors encounter difficulties in protecting, or are otherwise precluded from effectively protecting, the intellectual property rights important for our business in such jurisdictions, the value of these rights may be diminished and we may face additional competition from others in those jurisdictions.

Some countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. In addition, some countries limit the enforceability of patents against government agencies or government contractors.

In these countries, the patent owner may have limited remedies, which could materially diminish the value of such patent. If we or any of our licensors is forced to grant a license to third parties with respect to any patents relevant to our business, our competitive position may be impaired and our business and results of operations may be adversely affected.

Proceedings to defend or enforce our and our licensors' or collaboration partners' patent rights in foreign jurisdictions could result in substantial costs and divert our and our licensors' or collaboration partners' efforts and attention from other aspects of our business, could put our and our licensors' or collaboration partners' patents at risk of being invalidated or interpreted narrowly, could put our and our licensors' or collaboration partners' patent applications at risk of not issuing and could provoke third parties to assert claims against us or our licensors or collaboration partners. We or our licensors or collaboration partners may not prevail in any lawsuits that we or our licensors or collaboration partners initiate and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property and proprietary rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license. If we or our licensors or collaborators encounter difficulties in protecting, or are otherwise precluded from effectively protecting, the intellectual property rights important for our business in such jurisdictions, the value of these rights may be diminished and we may face additional competition from others in those jurisdictions.

For example, the complexity and uncertainty of European patent laws have also increased in recent years. In Europe, a new unitary patent system has become effective and a new European patent court started operations in 2023, which may significantly impact European patents, including those granted before the introduction of such a system. Under the unitary patent system, European patent applications have the option, upon grant of a European patent, of becoming a Unitary Patent which will be subject to the jurisdiction of the new Unified Patent Court (UPC). As the UPC is a new court system, there is no precedent for the court, increasing the uncertainty of any litigation. Patents granted before the implementation of the UPC will have the option of opting out of the jurisdiction of the UPC and remaining as national patents in the UPC countries. Patents that remain under the jurisdiction of the UPC will be potentially vulnerable to a single UPC-based revocation challenge that, if successful, could invalidate the patent in all countries who are signatories to the UPC. We cannot predict with certainty the long-term effects of any potential changes.

In addition, a decree was adopted by the Russian government in March 2022 as a response to economic sanctions imposed by various other governments, allowing Russian companies and individuals to exploit inventions owned by patentees that have citizenship or nationality in, are registered in, or have a primary place of business or profit-making activities in the U.S. and other countries that Russia has deemed unfriendly without consent or compensation. Consequently, we would not be able to prevent third parties from practicing our inventions protected by Russian patents in Russia or from manufacturing, selling, using or importing products made using our inventions in and into Russia. Accordingly, our competitive position may be impaired, and our business, financial condition, results of operations and prospects may be adversely affected.

We are a party to agreements under which we are granted rights to intellectual property that are important to our business and we expect that we may need to enter into additional license agreements in the future. Under certain license agreements, we may not control the preparation, filing, prosecution or maintenance of the licensed intellectual property, or may not have the first right to enforce or defend the intellectual property.

In those cases, we may not be able to adequately influence patent prosecution, enforcement or defense, or prevent inadvertent lapses of coverage due to failure to pay maintenance fees and we cannot be certain that these patents and patent applications will be prepared, filed, prosecuted, maintained, enforced, and defended in a manner consistent with the best interests of our business and that does not compromise the patent rights. Existing license agreements impose, and we expect that future license agreements will impose, various development obligations as well as other obligations, such as payment of royalties. If we fail to comply with our obligations under these agreements, the licensor may have the right to terminate the license. The termination of any license agreements or failure to adequately protect such license agreements could prevent us from commercializing product candidates covered by the licensed intellectual property. For more information regarding our license and collaboration agreements, see “Business—License and Collaboration Agreements.”

Disputes may arise regarding intellectual property subject to a licensing agreement, including:

•the scope of rights granted under the license agreement and other interpretation-related issues;

•the extent to which our technology and processes infringe, misappropriate or otherwise violate intellectual property of the licensor that is not subject to the licensing agreement;

•the sublicensing of patent and other rights under any current or future collaboration relationships;

•our diligence obligations under the license agreement and what activities satisfy those diligence obligations; and

•the ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our licensors and us and our partners.

In addition, the agreements under which we currently license intellectual property or technology from third parties are complex, and certain provisions in such agreements may be susceptible to multiple interpretations. The resolution of any contract interpretation disagreement that may arise could narrow what we believe to be the scope of our rights to the relevant intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant agreement, either of which could have a material adverse effect on our business, financial condition, results of operations, and prospects. Moreover, if disputes over intellectual property that we have licensed prevent or impair our ability to maintain our current licensing arrangements on commercially acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates, which could have a material adverse effect on our business, financial conditions, results of operations, and prospects.

It is possible that we may be unable to obtain any necessary additional licenses at a reasonable cost or on reasonable terms, if at all. In that event, we may be required to expend significant time and resources to redesign our technology, product candidates, or the methods for manufacturing them or to develop or license replacement technology, all of which may not be feasible on a technical or commercial basis. If we are unable to do so, we may be unable to develop or commercialize the affected product candidates, which could harm our business, financial condition, results of operations, and prospects significantly. We cannot provide any assurances that third party patents do not exist which might be enforced against our current technology, including our DARPin product candidates, manufacturing methods or future methods or products resulting in either an injunction prohibiting our manufacture or sales, or, with respect to our sales, an obligation on our part to pay royalties or other forms of compensation to third parties, which could be significant.

The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations, and may not adequately protect our business, or permit us to maintain our competitive advantage. For example:

•others may be able to make compounds that are similar or substantially equivalent to our product candidates but that are not covered by the claims of the patents that we own or have exclusively licensed.

•the patents of third parties, including patents related to repeat protein technology, may have an adverse effect on our business.

•we or our current or future licensors or strategic partners might not have been the first to conceive or reduce to practice the inventions covered by the issued patent or pending patent application that we own or have licensed.

•we or our current or future licensors or strategic partners might not have been the first to file patent applications covering certain of our or their inventions.

•others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing, misappropriating or otherwise violating our intellectual property rights;

•it is possible that our current or future patent applications will not lead to issued patents.

•issued patents that we own or license may not provide us with any competitive advantage, or may be held invalid or unenforceable, including as a result of legal challenges by our competitors.

•our competitors might conduct research and development activities in countries where we do not have patent rights and then use the information learned from such activities to develop competitive products for sale in our major commercial markets;

•third parties performing manufacturing or testing for us using our products or technologies could use the intellectual property of third parties without obtaining a proper license, rendering us susceptible to claims of infringement, misappropriation or other violation of such third parties’ intellectual property rights;

•we may not develop additional technologies that are patentable; and

•the patents of others may have an adverse effect on our business; in particular, our product candidates may in the future be tested for new indications, and if one proves to be effective against a specific new indication, we may be confronted with existing patents covering such indication.

Should any of these events occur, they could have a material adverse effect on our business, financial condition, results of operations, and prospects.

Our success is heavily dependent on the extent of our intellectual property rights, particularly patents. Obtaining, defending and enforcing patents in the biopharmaceutical industry involves both technological and legal complexity and is costly, time-consuming and inherently uncertain. Changes in either the patent laws or interpretation of the patent laws in the European Union, United States or other jurisdictions could increase the uncertainties and costs surrounding the prosecution of patent applications and the enforcement or defense of issued patents.

The Leahy-Smith America Invents Act, or the AIA, was enacted in the United States in September 2011, resulting in significant changes to the U.S. patent system.

For example, assuming that other requirements for patentability are met, prior to March 2013, in the United States, the first to invent the claimed invention was entitled to the patent, while outside the United States, the first to file a patent application was entitled to the patent. As of March 16, 2013, under the AIA, the United States transitioned to a "first-to-file" system in which, assuming that other requirements for patentability are met, the first inventor to file a patent application will be entitled to the patent on an invention regardless of whether a third party was the first to invent the claimed invention. Therefore, a third party that files a patent application in the USPTO before us could therefore be awarded a patent covering an invention even if we had made the invention before it was made by the third party. This will require us to be cognizant of the time from invention to filing of a patent application, and circumstances could prevent or dissuade us from promptly filing patent applications on our inventions.

The AIA also includes a number of significant changes that affect the way patent applications will be prosecuted and also may affect patent litigation. These include changes that limit where a patentee may file a patent infringement suit and that allow third party submissions of prior art to the USPTO during patent prosecution and additional procedures to attack the validity of a patent by USPTO-administered post-grant proceedings, including post-grant review, inter partes review, and derivation proceedings. Because of a lower evidentiary standard in USPTO proceedings compared to the evidentiary standard in U.S. federal courts necessary to invalidate a patent claim, a third party could potentially provide evidence in a USPTO proceeding sufficient for the USPTO to hold a claim invalid even though the same evidence would be insufficient to invalidate the claim if first presented in a district court action. Accordingly, a third party may attempt to use USPTO procedures to invalidate our patent claims that would not have been invalidated if first challenged by the third party as a defendant in a district court action. The AIA and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material adverse effect on our business, financial condition, results of operations, and prospects.

In addition, the patent positions of companies in the development and commercialization of biologics and pharmaceuticals are particularly uncertain. The U.S. Supreme Court has ruled on several patent cases in recent years, either narrowing the scope of patent protection available in certain circumstances or weakening the rights of patent owners in certain situations. In addition to increasing uncertainty with regard to our ability to obtain patents in the future, this combination of events has created uncertainty with respect to the value of patents, once obtained. Depending on decisions by the U.S. Congress, the federal courts and the USPTO, and other applicable bodies in the European Union and other foreign jurisdictions, the laws and regulations governing patents could change in unpredictable ways that could weaken our ability to obtain new patents or to defend and enforce our existing patents and patents that we might obtain in the future.

We consider proprietary trade secrets, confidential know-how and unpatented know-how to be important to our business and competitive position. We may rely on trade secrets or confidential know-how to protect our technology, especially where patent protection is believed to be of limited value. However, trade secrets and confidential know-how are difficult to protect.

To protect this type of information against disclosure or appropriation by competitors, our policy is to require our employees, consultants, contractors, CROs and advisors to enter into confidentiality agreements with us.

We cannot guarantee that we have entered into such agreements with each party that may have or have had access to our trade secrets or proprietary technology and processes and, despite these efforts, any of these parties may unintentionally or willfully breach the agreements and use or disclose our confidential information to competitors, and such agreements may not provide an adequate remedy in the event of unauthorized disclosure or use of confidential information. Enforcing a claim that a third party illegally disclosed or misappropriated trade secrets or confidential know-how is expensive, time-consuming and unpredictable. In addition, the enforceability of confidentiality agreements and trade secrets may vary from jurisdiction to jurisdiction. Furthermore, if a third party lawfully obtained or independently developed any of our trade secrets, we would have no right to prevent such third party from using that technology or information to compete with us or from disclosing it to others, which could harm our competitive position. Additionally, if the steps taken to maintain our trade secrets are deemed inadequate, we may have insufficient recourse against third parties for misappropriating our trade secrets.

Failure to effectively maintain and protect trade secrets or confidential know-how could adversely affect our competitive position. Moreover, our competitors may independently develop substantially equivalent proprietary information and may even apply for patent protection in respect of the same. If successful in obtaining such patent protection, our competitors may be able to limit our use of our trade secrets or confidential know-how.

Many of our consultants and employees, including our senior management, were previously employed at other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Some of these consultants and employees executed proprietary rights, non-disclosure and non-competition agreements in connection with such previous employment. Although we try to ensure that our consultants and employees do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that we or these consultants and employees have used or disclosed confidential information or intellectual property, including trade secrets or other proprietary information, of any such consultant's or employee's current or former employer, or have breached their non-competition agreement. Litigation may be necessary to defend against such claims.

In addition, we or our licensors may be subject to claims that former employees, consultants, collaborators or other third parties have an interest in our owned or in-licensed patents or other intellectual property as an inventor or co-inventor. While it is our policy to require our consultants and employees who may be involved in the development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our own. Our and their assignment agreements may not be self-executing or may be breached, and we may be forced to bring claims against third parties, or defend claims they may bring against us, to determine the ownership of what we regard as our intellectual property.

If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel or sustain damages. Such intellectual property rights could be awarded to a third party, and we could be required to obtain a license from such third party to commercialize our technology or products. Such a license may not be available on commercially reasonable terms or at all. Even if we successfully prosecute or defend against such claims, litigation could result in substantial costs and distract management.

Periodic maintenance and annuity fees on any of our owned or licensed patents and patent applications are due to be paid to the USPTO, the EPO and other foreign patent agencies in several stages over the lifetime of the patents and patent applications. The USPTO, the EPO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and other similar provisions during the patent application process. While an inadvertent lapse can in many cases be cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Non-compliance events that could result in abandonment or lapse of a patent or patent application include failure to respond to official actions within prescribed time limits, non-payment of fees and failure to properly legalize and submit formal documents. If we or our licensors or collaboration partners fail to maintain the patents and patent applications covering our product candidates, our competitors might be able to enter the market earlier with similar products or technology, which would have an adverse effect on our business.

Our success depends upon the continued contributions of our key management, scientific and technical personnel, many of whom have been instrumental for us and have substantial experience with our therapies and related technologies. These key management individuals include the members of our board of directors and executive management, including Dr. Patrick Amstutz, our Chief Executive Officer, Dr. Alexander Zürcher, our Chief Operating Officer, Dr. Michael Tobias Stumpp, our EVP Projects, Dr. Philippe Legenne, our acting Chief Medical Officer and Renate Gloggner, our EVP People and Culture.

The loss of key managers and senior scientists could delay our research and development activities. In addition, our ability to compete in the highly competitive biotechnology and pharmaceutical industries, and particularly, in the oncology field, depends upon our ability to attract and retain highly qualified management, scientific and medical personnel. Many other biotechnology and pharmaceutical companies and academic institutions that we compete against for qualified personnel have greater financial and other resources, different risk profiles and a longer history in the industry than we do. Therefore, we might not be able to attract or retain these key persons on conditions that are economically acceptable. Furthermore, we will need to recruit new managers and qualified scientific personnel to develop our business if we expand into fields that will require additional skills. Additionally, there is a larger pool of qualified scientific and medical personnel in the United States than in Switzerland, and we may need to increase our presence in the United States in order to attract and retain the necessary human resources. Our inability to attract and retain these key persons could prevent us from achieving our objectives and implementing our business strategy, which could have an adverse effect on our business and prospects.

We expect to experience growth in the number of our employees and the scope of our operations, particularly in the areas of drug development, regulatory affairs, sales and marketing and support functions such as finance, human resources, legal, intellectual property, information technology and administration. To manage our anticipated future growth, we must continue to implement and improve our managerial, operational and financial systems, expand our facilities and continue to recruit and train additional qualified personnel.

Due to our limited resources and the limited experience of our management team in managing a company with such anticipated growth, we may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. The expansion of our operations may lead to significant costs and may divert our management and business development resources. Any inability to manage growth could delay the execution of our business plans or disrupt our operations.

Since our inception in 2004, we have grown organically without any acquisitions. Should we in the future contemplate to acquire any complementary business, product candidates or technologies, our ability to integrate and manage acquired businesses, product candidates or technologies effectively will depend upon a number of factors including the size of the acquired business, the complexity of any product candidate or technology and the resulting difficulty of integrating the acquired business's operations, if any. Our relationship with current employees or employees of any acquired business may become impaired. We may also be subject to unexpected claims and liabilities arising from such acquisitions. These claims and liabilities could be costly to defend, could be material to our financial position and might exceed either the limitations of any applicable indemnification provisions or the financial resources of the indemnifying parties.

Our business is subject to risks associated with conducting business internationally. Accordingly, our future results could be harmed by a variety of factors, including:

•economic weakness, including inflation, increase of interest rates, or political instability in particular economies and markets;

•differing regulatory requirements for drug approvals;

•differing jurisdictions could present different issues for securing, maintaining or obtaining freedom to operate in such jurisdictions;

•potentially reduced ability to obtain, maintain, protect and enforce intellectual property rights and other proprietary rights;

•difficulties in compliance with different, complex and changing laws, regulations and court systems of multiple jurisdictions and compliance with a wide variety of foreign laws, treaties and regulations;

•changes in regulations and customs, tariffs and trade barriers;

•changes in currency exchange rates of the euro, U.S. dollar and Swiss franc and currency controls;

•changes in a specific country's or region's political or economic environment;

•trade protection measures, import or export licensing requirements or other restrictive actions by governments;

•differing reimbursement regimes and price controls in certain international markets;

•negative consequences from changes in tax laws;

•compliance with tax, employment, immigration and labor laws for employees living or traveling abroad, including, for example, the variable tax treatment in different jurisdictions of stock options granted under our employee stock plan;

•workforce uncertainty in countries where labor unrest is more common than in the United States;

•litigation or administrative actions resulting from claims against us by current or former employees or consultants individually or as part of class actions, including claims of wrongful terminations, discrimination, misclassification or other violations of labor law or other alleged conduct;

•litigation resulting from claims against us by third parties, including claims of breach of noncompete and confidentiality provisions of our employees' former employment agreements with such third parties;

•difficulties associated with staffing and managing international operations, including differing labor relations;

•production shortages resulting from any events affecting raw material supply or manufacturing capabilities abroad; and

•business interruptions resulting from cyber-attacks, geo-political actions, including war (such as the Russia-Ukraine war and the Israel-Hamas war) and terrorism, or natural disasters including earthquakes, typhoons, floods and fires.

Additionally, in connection with the ongoing war between Russia and Ukraine, the U.S. government and other governments have imposed enhanced export controls on certain products and sanctions on certain industry sectors and parties in Russia, and have indicated they will consider imposing additional sanctions and other similar measures in the near future. Although we do not have any operations in Russia or Ukraine, further escalation of geopolitical tensions could have a broader impact that expands into other markets where we do business, which could adversely affect our business, our supply chain or our collaborators.

Due to the international scope of our operations, our assets, earnings and cash flows are influenced by movements in exchange rates of several currencies, particularly regarding U.S. dollars, euros, and Swiss francs. Our functional currency is the Swiss franc and the majority of our operating expenses are paid in Swiss francs, but we also may receive payments from our business partners in U.S. dollars or euros and we regularly acquire services, consumables and materials in U.S. dollars, euros and Swiss francs. Further, potential future revenue may be derived from abroad, particularly from the United States and the European Union. As a result, our business and share price may be affected by fluctuations in foreign exchange rates between the Swiss franc, the euro, the U.S. dollar and these other currencies, which may also have a significant impact on our reported results of operations and cash flows from period to period. Besides our natural hedging, currently, we do not have any exchange rate hedging arrangements in place.

In addition, the possible abandonment of the euro by one or more members of the European Union could materially affect our business in the future. Despite measures taken by the European Union to provide funding to certain European Union member states in financial difficulties and by a number of European countries to stabilize their economies and reduce their debt burdens, it is possible that the euro could be abandoned in the future as a currency by countries that have adopted its use. This could lead to the re-introduction of individual currencies in one or more European Union member states, or in more extreme circumstances, the abandonment of the euro or the dissolution of the European Union. The effects on our business of a potential dissolution of the European Union, the exit of one or more European Union member states from the European Union or the abandonment of the euro as a currency, are impossible to predict with certainty, and any such events could have a material adverse effect on our business, financial condition and results of operations.

Global economic instability and unfavorable conditions could materially and adversely affect our business. The war between Russia and Ukraine is ongoing. The impact to Ukraine as well as actions taken by other countries, including new and stricter sanctions imposed by Canada, the United Kingdom, the European Union, the United States. and other countries against officials, individuals, regions, and industries in Russia and Ukraine, and actions taken by Russia in response to such sanctions, and responses of countries and political bodies to such sanctions, tensions, and military actions and the potential for more widespread conflict, have resulted in supply chain disruptions, increases in inflation, financial market volatility and capital markets disruption. In addition, the war between Israel and Hamas is ongoing. Any resulting instability and unfavorable economic conditions from the wars could disrupt our and our collaborators’ supply chains and adversely affect our and our collaborators’ ability to conduct ongoing and future clinical trials of our product candidates. The extent and duration of the wars, sanctions and resulting economic, market and other disruptions are impossible to predict, but could be substantial. Any such disruptions may heighten the impact of the other risks described in this report on Form 20-F.

Following the result of a referendum in 2016, the United Kingdom left the European Union on January 31, 2020, commonly referred to as Brexit. Pursuant to the formal withdrawal arrangements agreed between the United Kingdom and the European Union, the United Kingdom was subject to a transition period until December 31, 2020, or the Transition Period, during which European Union rules continued to apply. The Trade and Cooperation Agreement, or the Trade and Cooperation Agreement, which outlines the future trading relationship between the United Kingdom and the European Union was agreed in December 2020 and formally entered into force on May 1, 2021.

Since a significant proportion of the regulatory framework in the United Kingdom applicable to our business and our product candidates is derived from European Union directives and regulations, Brexit has had, and will continue to have, a material impact on the regulatory regime with respect to the development, manufacture, importation, approval and commercialization of our product candidates in the United Kingdom. For example, Great Britain is no longer covered by the centralized procedures for obtaining European Union-wide marketing authorizations from the EMA, and a separate marketing authorization will be required to market our product candidates in Great Britain. It is currently unclear whether the Medicines & Healthcare products Regulatory Agency in the United Kingdom is sufficiently prepared to handle the increased volume of marketing authorization applications that it is likely to receive. Any delay in obtaining, or an inability to obtain, any marketing approvals, as a result of Brexit or otherwise, would delay or prevent us from commercializing our product candidates in the United Kingdom and limit our ability to generate revenue and achieve and sustain profitability. We could face significant additional expenses to obtain regulatory approval for our products in the United Kingdom.

The determination of our provision for income taxes and other tax liabilities requires significant judgment, including the adoption of certain accounting policies and our determination of whether we will be able to obtain a future tax benefit from our deferred tax assets. We cannot guarantee that our interpretations will not be challenged by the relevant tax authorities, or that the relevant tax laws and regulations, or the interpretation thereof, including through tax rulings, by the relevant tax authorities, will not be subject to change. Any adverse outcome of such a challenge may lead to adjustments in the amounts recorded in our financial statements, and could have a material adverse effect on our operating results and financial condition.

We are subject to laws and regulations on tax levies and other charges or contributions in different countries, including transfer pricing and tax regulations applicable to the compensation of personnel and third parties. Transactions between current group companies, as well as additional companies that may form part of our group in the future, are subject to transfer pricing regulations, which may be subject to change or our existing transfer pricing system could be challenged by the relevant tax authority, and any such changes or challenges could adversely affect us.

Our effective tax rate could be adversely affected by changes in tax laws, treaties and regulations, both internationally and domestically, or the interpretation thereof by the relevant tax authorities, including changes to the U.K. research and development tax credit regime or the "patent box" regime, possible changes to the corporate income tax base, changes to the additional deduction for expenditure on research and development personnel in Switzerland and other tax incentives. An increase in our effective tax rate could have an adverse effect on our business, financial position, results of operations and cash flows.

In addition, we may not be able to use, or changes in tax regulations may affect the use of, certain tax loss carryforwards that we have generated in prior years. For instance, as of December 31, 2023, we had substantial tax loss carry forwards. In general, some of these tax loss carry forwards may be forfeited in whole, or in part, as a result of various transactions, or their utilization may be restricted by statutory law in the relevant jurisdiction. Any corporate reorganization by us or any transaction relating to our shareholding structure may result in partial or complete forfeiture of tax loss carry forwards. If not used, tax loss carryforwards for Swiss corporate income tax purposes expire seven years after the tax year in which they were incurred. Due to our limited future / expected income, there is a high risk that our tax loss carryforwards will expire in part or in their entirety and therefore will not be able to be used to offset future taxable income for Swiss corporate income tax purposes. Furthermore, any tax loss carry forwards that we report on our Swiss tax returns are subject to review and confirmation by the competent Swiss tax authorities in their tax assessment of the tax year for which the tax loss carryforwards are used to offset taxable income. Consequently, we are exposed to the risk that the competent Swiss tax authorities may not accept the reported tax loss carryforwards in part or in their entirety.

Our effective tax rate could increase due to several factors, including:

•changes in the relative amounts of income before taxes in the jurisdictions in which we operate that have differing statutory tax rates;

•changes in tax laws, tax treaties, and regulations or the interpretation of them;

•changes to our assessment about our ability to realize any deferred tax assets that are based on estimates of our future results, the prudence and feasibility of possible tax planning strategies, and the economic and political environments in which we do business;

•the outcome of any current or future tax audits, examinations, or administrative appeals; and

•any limitations or adverse findings regarding our ability to do business in some jurisdictions.

Any of these developments could adversely affect our business, results of operations and financial condition.

We operate in multiple jurisdictions and our profits are taxed pursuant to the tax laws of these jurisdictions. The tax laws applicable to our business activities, however, are subject to changes in interpretation. Our tax position could be adversely impacted by changes in tax rates, tax laws, tax practice, tax treaties or tax regulations or changes in the interpretation thereof by the tax authorities in jurisdictions in which we currently do or may in the future elect to do business. Our effective income tax rate may be affected by changes in or interpretations of tax laws, treaties, rulings, regulations or agreements in any such jurisdiction, the resolution of issues arising from any future tax audits with various tax authorities, utilization of net operating loss and tax credit carryforwards, changes in geographical allocation of income and expense, and changes in management’s assessment of matters such as the realizability of deferred tax assets. In the past, we have experienced fluctuations in our effective income tax rate. Our actual tax rate may vary from our expectation and that variance may be material. Our effective income tax rate in a given fiscal year reflects a variety of factors that may not be present in the succeeding fiscal year or years. There is no assurance that our effective income tax rate will not change in future periods.

The standard effective corporate tax rate in Schlieren, Canton of Zurich, can change from time to time. The standard combined (federal, cantonal, municipal) effective corporate income tax rate, except for dividend income for which we could claim a participation exemption, for 2023 in Schlieren, Canton of Zurich, is approximately 19.3%.

We urge our shareholders to consult with their legal and tax advisors with respect to the potential tax consequences of investing in or holding our ADSs and ordinary shares.

The market price of our ADSs and our ordinary shares may fluctuate significantly due to a variety of factors, many of which are beyond our control, including:

•positive or negative results of testing and clinical trials reported or conducted by us, strategic partners or competitors;

•delays in entering into strategic relationships with respect to development or commercialization of our product candidates or entering into strategic relationships on terms that are not deemed to be favorable to us;

•technological innovations or commercial product introductions by us or competitors;

•changes in government regulations;

•developments concerning proprietary rights, including patents and litigation matters;

•public concern relating to the commercial value or safety of any of our product candidates;

•financing or other corporate transactions;

•publication of research reports or comments by securities or industry analysts;

•general market conditions in the pharmaceutical industry or in the economy as a whole;

•impact of macroeconomic factors, including a health pandemic, rising inflation, the U.S. Federal Reserve raising interest rates, the Russia-Ukraine war and the Israel-Hamas war, on the global economy or financial markets; or

•price and volume fluctuations attributable to inconsistent trading volume levels of our ADSs and/or ordinary shares.

These and other market and industry factors may cause the market price and demand for our ADSs and ordinary shares to fluctuate substantially, regardless of our actual operating performance, which may limit or prevent investors from readily selling their ADSs or ordinary shares and may otherwise negatively affect the liquidity of our ADSs and ordinary shares. In addition, the stock market in general, and biopharmaceutical companies in particular, have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of these companies.

As a public company in the United States, and particularly after we no longer qualify as an emerging growth company, we have and will continue to incur significant legal, accounting and other expenses that we did not incur as a public company listed only on the SIX Swiss Exchange. We are a corporation (Aktiengesellschaft), organized under the laws of Switzerland in accordance with articles 620 et seqq. CO and subject to the listing rules and the applicable regulations for companies listed on the SIX Swiss Exchange, the Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of the Nasdaq Stock Market, or Nasdaq, and other applicable securities rules and regulations that impose various requirements on non-U.S. reporting public companies, including the establishment and maintenance of effective disclosure and financial controls and certain additional corporate governance practices. Our board of directors and other personnel are required to devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations will increase our legal and financial compliance costs and will make some activities more time-consuming and costly.

Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, we are required to furnish a report on our internal control over financial reporting. However, while we remain an emerging growth company, we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm. To achieve compliance with Section 404 within the prescribed period, we are documenting and evaluating our internal control over financial reporting, which is both costly and challenging. In this regard, we continue to dedicate internal resources, continue to engage outside consultants and adopt a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that controls are functioning as documented and implement a continuous reporting and improvement process for internal control over financial reporting.

Despite our efforts, there is a risk that we will not be able to conclude, within the prescribed timeframe or at all, that our internal control over financial reporting is effective as required by Section 404. If we identify one or more material weaknesses, it could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

We have a number of significant shareholders. For an overview of our current significant shareholders, please see "Principal Shareholders."

Currently, we are not aware that any of our existing shareholders have entered or will enter into a shareholders' agreement with respect to the exercise of their voting rights. Nevertheless, depending on the level of attendance at our general meetings of shareholders, or the General Meeting, these significant shareholders could have the ability to significantly influence the outcome of decisions taken at any such General Meeting. Any such voting by these shareholders may not be in accordance with our interests or those of our other shareholders. Among other consequences, this concentration of ownership may have the effect of delaying or preventing a change in control and might therefore negatively affect the market price of our ADSs.

If our existing shareholders sell, or indicate an intent to sell, substantial amounts of our securities in the public market, the trading price of our ADSs and our ordinary shares could decline significantly. As of December 31, 2023, we had 36,354,297 ordinary shares outstanding including 3,500,000 treasury shares held through our wholly-owned subsidiary Molecular Partners Inc. and 3,000,000 ADS representing our ordinary shares issued and outstanding. In addition, ordinary shares subject to outstanding options under our equity incentive plans and the ordinary shares reserved for future issuance under our equity incentive plan will become eligible for sale in the public market in the future, subject to certain legal and contractual limitations.

We intend to register all ordinary shares that we may issue under our equity compensation plans. Once we register these ordinary shares, they can be freely sold in the public market upon issuance, subject to volume limitations applicable to affiliates and any applicable lock-up agreements.

Provisions of our articles of association may make it more difficult for a third party to acquire control of us. For example, our board of directors is authorized to deny the preemptive rights of shareholders and allocate them to third parties as a defense of an actual, threatened or potential takeover bid, in relation to which our board of directors, upon consultation with an independent financial adviser retained by it, has not recommended to the shareholders acceptance on the basis that the board of directors has not found the takeover bid to be financially fair to the shareholders.

In addition, several provisions of Swiss corporate law and certain other provisions of Swiss law, such as obligations to disclose significant shareholdings and merger control regulations, that apply to us may make an unsolicited tender offer, merger, change in management or other change in control of our company more difficult.

These provisions could discourage potential takeover attempts that other shareholders may consider to be in their best interest and could adversely affect the market price of our securities. These provisions may also have the effect of depriving ADS holders of the opportunity to sell their ADSs at a premium. In addition, the board of directors of Swiss companies may in certain instances, and subject to prior authorization by the shareholders, deter or frustrate public takeover bids through dilutive issuances of equity securities (pursuant to the authorized capital) or through share buy-backs.

Due to the international scope of our operations, our assets, earnings and cash flows are influenced by movements in exchange rates of several currencies, particularly the euro, U.S. dollar and Swiss franc. Our functional currency is the Swiss franc, and the majority of our operating expenses are paid in Swiss franc, but we also receive or may receive payments from business partners in U.S. dollars, and we regularly acquire services, consumables and materials in U.S. dollars and euros. Further, potential future revenue may be derived from abroad, particularly from the United States or the European Union. As a result, our business and the price of our ADSs and ordinary shares may be affected by fluctuations in foreign exchange rates between the Swiss franc and these other currencies, which may also have a significant impact on our reported results of operations and cash flows from period to period. Besides natural hedging, currently, we do not have any exchange rate hedging arrangements in place.

Moreover, because our ordinary shares currently trade on the SIX Swiss Exchange in Swiss francs, and our ADSs trade on the Nasdaq Global Select Market in U.S. dollars, fluctuations in the exchange rate between the U.S. dollar and the Swiss franc may result in temporary differences between the value of our ADSs and the value of our ordinary shares, which may result in heavy trading by investors seeking to exploit such differences.

Our ordinary shares have traded on the SIX Swiss Exchange since 2014 and our ADSs have traded on the Nasdaq Global Select Market since June 2021. Trading in our ADSs or ordinary shares on these markets takes place in different currencies (U.S. dollars on the Nasdaq Global Select Market and Swiss Francs on the SIX Swiss Exchange), at different times (resulting from different time zones, different trading days and different public holidays in the United States and Switzerland) and among a different investor base. The trading prices of our ordinary shares and our ADSs on these two markets may differ due to these and other factors. Any decrease in the price of our ordinary shares on the SIX Swiss Exchange could cause a decrease in the trading price of our ADSs on the Nasdaq Global Select Market. Investors could seek to sell or buy our ordinary shares to take advantage of any price differences between the markets through a practice referred to as arbitrage. Any arbitrage activity could create unexpected volatility in both our share prices on one exchange and the ordinary shares available for trading on the other exchange. In addition, holders of ADSs cannot immediately surrender their ADSs and withdraw the underlying ordinary shares for trading on the other market without effecting necessary procedures with the depositary. This could result in time delays and additional cost for holders of ADSs.

Because different types of our equity securities are admitted to trading and listed on two different stock exchanges in two different jurisdictions, two sets of securities laws and regulations and stock exchange rules apply to us contemporaneously. It cannot be excluded that the laws, regulations and/or rules of one jurisdiction or trading venue may require us to effect disclosures or filings or grant shareholders and/or holders of our ADSs certain rights that would be unlawful under the laws, regulations and/or rules of the respective other jurisdiction or trading venue.

For this or other reasons, it may prove difficult or impossible for us to at all times comply with the laws, regulations and/or rules of both jurisdictions and trading venues at the same time.

Holders of our ADSs are not treated as holders of our ordinary shares, unless they withdraw the ordinary shares underlying their ADSs in accordance with the deposit agreement and applicable laws and regulations. The depositary is the holder of the ordinary shares underlying our ADSs. Holders of our ADSs therefore do not have any rights as holders of our ordinary shares, other than the rights that they have pursuant to the deposit agreement.

ADSs are transferable on the books of the depositary. However, the depositary may close its books at any time or from time to time when it deems expedient in connection with the performance of its duties. The depositary may refuse to deliver, transfer or register transfers of ADSs generally when our books or the books of the depositary are closed, or at any time if we or the depositary think it is advisable to do so because of any requirement of law, government or governmental body, or under any provision of the deposit agreement, or for any other reason, subject to the right of ADS holders to cancel their ADSs and withdraw the underlying ordinary shares. Temporary delays in the cancellation of your ADSs and withdrawal of the underlying ordinary shares may arise because the depositary has closed its transfer books or we have closed our transfer books, the transfer of ordinary shares is blocked to permit voting at a shareholders' meeting or we are paying a dividend on our ordinary shares. In addition, ADS holders may not be able to cancel their ADSs and withdraw the underlying ordinary shares when they owe money for fees, taxes and similar charges and when it is necessary to prohibit withdrawals in order to comply with any laws or governmental regulations that apply to ADSs or to the withdrawal of ordinary shares or other deposited securities.

We are entitled to amend the deposit agreement and to change the rights of the ADS holders under the terms of such agreement, without the prior consent of the ADS holders. We and the depositary may agree to amend the deposit agreement in any way we decide is necessary or advantageous to us or to the depositary. Amendments may reflect, among other things, operational changes in the ADS program, legal developments affecting ADSs or changes in the terms of our business relationship with the depositary. In the event that the terms of an amendment are materially disadvantageous to ADS holders, ADS holders will only receive 30 days’ advance notice of the amendment, and no prior consent of the ADS holders is required under the deposit agreement. Furthermore, we may decide to direct the depositary to terminate the ADS facility at any time for any reason. For example, terminations may occur if we become the subject of a takeover or a going-private transaction. If the ADS facility will terminate, ADS holders will receive at least 30 days’ prior notice, but no prior consent is required from them. Under the circumstances that we decide to make an amendment to the deposit agreement that is disadvantageous to ADS holders or terminate the deposit agreement, the ADS holders may choose to sell their ADSs or surrender their ADSs and become direct holders of the underlying ordinary shares, but will have no right to any compensation whatsoever.

The deposit agreement governing the ADSs representing our ordinary shares provides that, to the fullest extent permitted by law, holders and beneficial owners of ADSs irrevocably waive the right to a jury trial of any claim they may have against us or the depositary arising out of or relating to the ADSs or the deposit agreement.

If this jury trial waiver provision is not permitted by applicable law, an action could proceed under the terms of the deposit agreement with a jury trial. If we or the depositary opposed a jury trial demand based on the waiver, the court would determine whether the waiver was enforceable based on the facts and circumstances of that case in accordance with the applicable state and federal law. To our knowledge, the enforceability of a contractual pre-dispute jury trial waiver in connection with claims arising under the federal securities laws has not been finally adjudicated by the United States Supreme Court. However, we believe that a contractual pre-dispute jury trial waiver provision is generally enforceable, including under the laws of the State of New York, which govern the deposit agreement, by a federal or state court in the City of New York, which has non-exclusive jurisdiction over matters arising under the deposit agreement. In determining whether to enforce a contractual pre-dispute jury trial waiver provision, courts will generally consider whether a party knowingly, intelligently and voluntarily waived the right to a jury trial. We believe that this is the case with respect to the deposit agreement and the ADSs. It is advisable that you consult legal counsel regarding the jury waiver provision before entering into the deposit agreement.

If you or any other holders or beneficial owners of ADSs bring a claim against us or the depositary in connection with matters arising under the deposit agreement or the ADSs, including claims under federal securities laws, you or such other holder or beneficial owner may not be entitled to a jury trial with respect to such claims, which may have the effect of limiting and discouraging lawsuits against us and/or the depositary. If a lawsuit is brought against us and/or the depositary under the deposit agreement, it may be heard only by a judge or justice of the applicable trial court, which would be conducted according to different civil procedures and may result in different outcomes than a trial by jury would have had, including results that could be less favorable to the plaintiff(s) in any such action, depending on, among other things, the nature of the claims, the judge or justice hearing such claims, and the venue of the hearing.

No condition, stipulation or provision of the deposit agreement or ADSs serves as a waiver by any holder or beneficial owner of ADSs or by us or the depositary of compliance with any substantive provision of the U.S. federal securities laws and the rules and regulations promulgated thereunder.

Moreover, as the jury trial waiver relates to claims arising out of or relating to the ADSs or the deposit agreement, we believe that, as a matter of construction of the clause, the waiver would likely to continue to apply to ADS holders who withdraw the ordinary shares from the ADS facility with respect to claims arising before the cancellation of the ADSs and the withdrawal of the ordinary shares, and the waiver would most likely not apply to ADS holders who subsequently withdraw the ordinary shares represented by ADSs from the ADS facility with respect to claims arising after the withdrawal. However, to our knowledge, there has been no case law on the applicability of the jury trial waiver to ADS holders who withdraw the ordinary shares represented by the ADSs from the ADS facility.

Except as described in this Annual Report on Form 20-F and the deposit agreement, holders of the ADSs are not able to exercise voting rights attached to the ordinary shares represented by the ADSs. Under the terms of the deposit agreement, holders of the ADSs may instruct the depositary to vote the ordinary shares underlying their ADSs.

Otherwise, holders of ADSs are not able to exercise their right to vote unless they withdraw the ordinary shares underlying their ADSs in accordance with the deposit agreement and applicable laws and regulations to vote them in person or by proxy in accordance with applicable Swiss laws and regulations and our articles of association. Even so, ADS holders may not know about a meeting far enough in advance to withdraw those ordinary shares. If we ask for the instructions of holders of the ADSs, the depositary, upon timely notice from us, will notify ADS holders of the upcoming vote and arrange to deliver our voting materials to them. Upon our request, the depositary will mail to holders a shareholder meeting notice that contains, among other things, a statement as to the manner in which voting instructions may be given. We cannot guarantee that ADS holders will receive the voting materials in time to ensure that they can instruct the depositary to vote the ordinary shares underlying their ADSs. In addition, regardless of whether timely voting instructions are provided to the depositary, at our request, the depositary will represent all ordinary shares underlying the ADSs for the purpose of establishing a quorum at a meeting of our shareholders. A shareholder is only entitled to participate in, and vote at, the meeting of shareholders, provided that its shares are recorded in its name at midnight (Central European Time) at the end of the 28th day preceding the date of the meeting of shareholders. In addition, the depositary's liability to ADS holders for failing to execute voting instructions or for the manner of executing voting instructions is limited by the deposit agreement. As a result, holders of ADSs may not be able to exercise their right to give voting instructions or to vote in person or by proxy and they may not have any recourse against the depositary or us if their ordinary shares are not voted as they have requested or if their shares cannot be voted.

The financial rights attached to our ordinary shares transfer to a holder of those shares upon purchasing such shares in a stock market transaction. Any voting rights or rights related to voting rights only transfer once the acquirer has been registered in the shareholders' register as shareholder of such ordinary shares. A beneficial owner that is not directly registered in the shareholders' register can enjoy the financial rights, voting rights and rights related to voting rights only through the entity that acts as nominee or depositary for those ordinary shares and is recorded in the shareholders' register as the shareholder of record of those shares. This is also the case if you hold ADSs. It is possible that a nominee or a depositary will be unwilling to exercise certain rights attached to the ordinary shares, such as rights that require litigation. Therefore, failing to register in the shareholders' register may result in your inability to exercise certain rights as a shareholder.

We have not paid any dividends since our incorporation. Even if future operations lead to significant levels of distributable profits, we currently intend that any earnings will be reinvested in our business and that dividends will not be paid until we have an established revenue stream to support continuing dividends. In addition, payment of any future dividends to shareholders would be subject to shareholder approval at our General Meeting, upon proposal of the board of directors, which proposal would be subject to the approval of the majority of the non-executive directors after taking into account various factors including our business prospects, cash requirements, financial performance and new product development. In addition, certain limitations apply to the payment of future dividends pursuant to Swiss law and our articles of association. In addition, payment of future cash dividends may be made only if our shareholders' equity exceeds the sum of our paid-in and called-up share capital plus the reserves required to be maintained by Swiss law or by our articles of association. Accordingly, investors cannot rely on cash dividend income from ADSs and any returns on an investment in the ADSs will likely depend entirely upon any future appreciation in the price of the ADSs.

The depositary for our ADSs will pay to you or distribute the cash dividends or other distributions it or the custodian receives on our ordinary shares or other deposited securities after deducting its fees and expenses. You will receive these distributions in proportion to the number of our ordinary shares your ADSs represent. However, in accordance with the limitations set forth in the deposit agreement, it may be unlawful or impractical to make a distribution available to holders of ADSs. We have no obligation to take any other action to permit the distribution of our ADSs, ordinary shares, rights or anything else to holders of our ADSs. This means that you may not receive the distributions we make on our ordinary shares or any value from them if it is unlawful or impracticable to make them available to you. These restrictions may have a material adverse effect on the value of your ADSs.

Under Swiss law, shareholders may receive certain pre-emptive rights to subscribe on a pro rata basis for issuance of equity or other securities that are convertible into equity. Due to laws and regulations in their respective jurisdictions, however, non-Swiss shareholders may not be able to exercise such rights unless we take action to register or otherwise qualify the rights offering under the laws of that jurisdiction. There can be no assurance that we would take any such action and we reserve the right to determine whether we should take such action in any jurisdiction. If shareholders in such jurisdictions were unable to exercise their subscription rights, their ownership interest in the Company would be diluted.

ADS holders have no pre-emptive rights to subscribe to newly issued shares unless we grant such rights to the foreign depositary. The right to exercise such pre-emptive rights is set out in the agreement between the ADS holder and the depositary.

We are a Swiss corporation. Our corporate affairs are governed by our articles of association and organizational rules and by the laws governing companies, including listed companies, incorporated in Switzerland. The rights of our shareholders and the responsibilities of members of our board of directors may be different from the rights and obligations of shareholders and directors of companies governed by the laws of U.S. jurisdictions. In the performance of its duties, our board of directors is required by Swiss law to consider the interests of our company, and may also have regard to the interests of our shareholders, our employees and other stakeholders, in all cases with due observation of the principles of reasonableness and fairness. It is possible that some of these parties will have interests that are different from, or in addition to, your interests as a holder of ADSs. Swiss corporate law limits the ability of our shareholders to challenge resolutions made or other actions taken by our board of directors in court. Our shareholders generally are not permitted to file a suit to reverse a decision or an action taken by our board of directors but are instead only permitted to seek damages for breaches of fiduciary duty. As a matter of Swiss law, shareholder claims against a member of our board of directors for breach of fiduciary duty would have to be brought to the competent courts in Schlieren, Canton of Zurich, Switzerland, or where the relevant member of our board of directors is domiciled. In addition, under Swiss law, any claims by our shareholders against us must be brought exclusively to the competent courts in Schlieren, Canton of Zurich, Switzerland.

On January 1, 2023, legislation that modernized certain aspects of Swiss corporate law (the Swiss corporate law reform (Aktienrechtsrevision)) entered into force. The new legislation altered the rights of shareholders under Swiss law, and as a consequence the rights of holders of our ADSs. The Swiss corporate law reform is subject to certain transitional periods as provided for therein.

In particular, Swiss stock corporations registered with the Commercial Register on January 1, 2023, are required to amend their articles of incorporation and organizational regulations in line with the new legislation within a transitional period of two years (i.e., until January 1, 2025). See "Item 10. - Memorandum and Articles of Association - Swiss Corporate Law Reform." There can be no assurance that Swiss law will not once again change in the future, which could adversely affect the rights of our shareholders or holders of our ADSs. Furthermore, there can be no guarantee that Swiss law does or will protect our shareholders or the holders of our ADSs in a similar fashion as the laws of U.S. jurisdictions would, in particular as regards corporate law principles, if we were a U.S.-incorporated company.

We are organized under the laws of Switzerland. A further summary of applicable Swiss law is contained in this Annual Report on Form 20-F. There can be no assurance that Swiss law will not change in the future or that it will provide investors with the same protections afforded to investors of a Delaware corporation, which could adversely affect the rights of investors.

We are incorporated under the laws of Switzerland and our registered office and domicile is located in Schlieren, Switzerland. Substantially all of our assets are located outside the United States. A number of our directors and executive officers are not residents of the United States. As a result, it may not be possible for investors to effect service of process within the United States upon such persons or to enforce judgments obtained against them or us in U.S. courts, including judgments predicated upon the civil liability provisions of the U.S. federal securities laws. We have been advised by our Swiss counsel that there is doubt as to the enforceability in Switzerland of original actions, or in actions for enforcement of judgments of U.S. courts, of civil liabilities to the extent solely predicated upon the federal and state securities laws of the United States. Original actions against persons in Switzerland based solely upon the U.S. federal or state securities laws are governed, among other things, by the principles set forth in the Swiss Federal Act on Private International Law.

The United States currently does not have a treaty with Switzerland providing for the reciprocal recognition and enforcement of judgments, other than arbitration awards, in civil and commercial matters. Consequently, a final judgment for payment given by a court in the United States, whether or not predicated solely upon U.S. securities laws, would not automatically be recognized or enforceable in Switzerland. In order to obtain a judgment which is enforceable in Switzerland, the party in whose favor a final and conclusive judgment of the U.S. court has been rendered will be required to file its claim with a court of competent jurisdiction in Switzerland. Such party may submit to the Swiss court the final judgment rendered by the U.S. court. If and to the extent that the Swiss court finds that the jurisdiction of the U.S. court has been based on grounds which are internationally acceptable and that proper legal procedures have been observed, the court of Switzerland will, in principle, give binding effect to the judgment of the U.S. court, unless such judgment contravenes principles of public policy of Switzerland. Also, mandatory provisions of Swiss law may be applicable regardless of any other law that would otherwise apply. Swiss courts may deny the recognition and enforcement of punitive damages or other awards. Moreover, a Swiss court may reduce the amount of damages granted by a U.S. court and recognize damages only to the extent that they are necessary to compensate actual losses or damages. Enforcement and recognition of judgments of U.S. courts in Switzerland are solely governed by the provisions of the Swiss Federal Private International Law Act. This statute provides in principle that a judgment rendered by a non-Swiss court may be enforced in Switzerland only if:

•the non-Swiss court had jurisdiction pursuant to the Swiss Federal Act on Private International Law;

•the judgment of such non-Swiss court has become final and non-appealable;

•the judgment does not contravene Swiss public policy;

•the court procedures and the service of documents leading to the judgment were in accordance with the due process of law; and

•no proceeding involving the same position and the same subject matter was first brought in Switzerland, or adjudicated in Switzerland, or was earlier adjudicated in a third state and this decision is recognizable in Switzerland.

Based on the lack of a treaty as described above, U.S. investors may not be able to enforce against us or members of our board of directors or certain experts named herein who are residents of Switzerland or countries other than the United States any judgments obtained in U.S. courts in civil and commercial matters, including judgments under the U.S. federal securities laws.

Swiss law reserves for approval by shareholders certain corporate actions over which a board of directors would have authority in some other jurisdictions. For example, the payment of dividends and cancellation of treasury shares must be approved by shareholders. Swiss law also requires that our shareholders themselves resolve to, or authorize our board of directors to, increase our share capital. While our shareholders may authorize share capital that can be issued by our board of directors without additional shareholder approval, Swiss law limits this authorization to 50% of the share capital registered in the commercial register at the time of the authorization. The authorization, furthermore, has a limited duration of up to five years and must be renewed by the shareholders from time to time thereafter in order to be available for raising capital. For an overview of the changes in Swiss corporate law due to the Swiss corporate law reform that came into effect on January 1, 2023, see "Item 10. - Memorandum and Articles of Association - Swiss Corporate Law Reform." Additionally, subject to specified exceptions, including exceptions explicitly described in our articles of association, Swiss law grants preemptive rights to existing shareholders to subscribe for new issuances of shares, which may be limited or withdrawn only under certain limited conditions. Swiss law also does not provide as much flexibility in the various rights and regulations that can attach to different categories of shares as do the laws of some other jurisdictions. These Swiss law requirements relating to our capital management may limit our flexibility, and situations may arise where greater flexibility would have provided benefits to our shareholders. For changes to Swiss corporate law potentially affecting the rights of the holders of our ADSs, see also "Item 10. - Memorandum and Articles of Association - Swiss Corporate Law Reform"

We report under the Securities Exchange Act of 1934, as amended, or the Exchange Act, as a non-U.S. company with foreign private issuer status. Because we qualify as a foreign private issuer under the Exchange Act, we are exempt from certain provisions of the Exchange Act that are applicable to U.S. domestic public companies, including (i) the sections of the Exchange Act regulating the solicitation of proxies, consents or authorizations in respect of a security registered under the Exchange Act; (ii) the sections of the Exchange Act requiring insiders to file public reports of their stock ownership and trading activities and liability for insiders who profit from trades made in a short period of time; and (iii) the rules under the Exchange Act requiring the filing with the SEC of quarterly reports on Form 10-Q containing unaudited financial and other specified information, or current reports on Form 8-K, upon the occurrence of specified significant events.

In addition, foreign private issuers are not required to file their annual report on Form 20-F until 120 days after the end of each fiscal year, while U.S. domestic issuers that are accelerated filers are required to file their annual report on Form 10-K within 75 days after the end of each fiscal year. Foreign private issuers are also exempt from the Regulation Fair Disclosure, aimed at preventing issuers from making selective disclosures of material information. As a result of the above, you may not have the same protections afforded to shareholders of companies that are not foreign private issuers.

We are a foreign private issuer. As a result, in accordance with Nasdaq Listing Rule 5615(a)(3), we comply with home country governance requirements and certain exemptions thereunder rather than complying with certain of the corporate governance requirements of Nasdaq.

Swiss law does not require that a majority of our board of directors consist of independent directors. Our board of directors therefore may include fewer independent directors than would be required if we were subject to Nasdaq Listing Rule 5605(b)(1). In addition, we are not subject to Nasdaq Listing Rule 5605(b)(2), which requires that independent directors regularly have scheduled meetings at which only independent directors are present.

Although Swiss law also requires that we adopt a compensation committee, we follow home country requirements with respect to such committee. As a result, our practice varies from the requirements of Nasdaq Listing Rule 5605(d), which sets forth certain requirements as to the responsibilities, composition and independence of compensation committees. We have opted out of shareholder approval requirements for the issuance of securities in connection with certain events such as the acquisition of stock or assets of another company, the establishment of or amendments to equity-based compensation plans for employees, a change of control of us and certain private placements. To this extent, our practice varies from the independent director oversight of director nominations requirements of Nasdaq Listing Rule 5605(e).

Furthermore, in accordance with Swiss law and generally accepted business practices, our articles of association do not provide quorum requirements generally applicable to general meetings of shareholders. Our practice thus varies from the requirement of Nasdaq Listing Rule 5620(c), which requires an issuer to provide in its bylaws for a generally applicable quorum, and that such quorum may not be less than one-third of the outstanding voting stock. To this extent, our practice varies from the requirements of Nasdaq Listing Rule 5635, which generally requires an issuer to obtain shareholder approval for the issuance of securities in connection with such events.

As a result of the above, you may not have the same protections afforded to shareholders of companies that are not foreign private issuers.

We may no longer be a foreign private issuer as of June 30 for a given fiscal year (the end of our second fiscal quarter for a given fiscal year), which would require us to comply with all of the periodic disclosure and current reporting requirements of the Exchange Act applicable to U.S. domestic issuers as of January 1 of such year. In order to maintain our current status as a foreign private issuer, either (a) a majority of our ordinary shares must be either directly or indirectly owned of record by non-residents of the United States or (b)(i) a majority of our executive officers or directors may not be U.S. citizens or residents, (ii) more than 50% of our assets cannot be located in the United States and (iii) our business must be administered principally outside the United States.

If we lost foreign private issuer status, we would be required to comply with the Exchange Act reporting and other requirements applicable to U.S. domestic issuers, which are more detailed and extensive than the requirements for foreign private issuers. We would be required to change our accounting from reporting under IFRS to reporting under U.S. generally accepted accounting principles. We would also be required to make changes in our corporate governance practices in accordance with various SEC and Nasdaq rules. The regulatory and compliance costs to us under U.S. securities laws if we are required to comply with the reporting requirements applicable to a U.S. domestic issuer may be significantly higher than the cost we would incur as a foreign private issuer. As a result, we expect that a loss of foreign private issuer status would increase our legal and financial compliance costs and would make some activities highly time consuming and costly. We also expect that if we were required to comply with the rules and regulations applicable to U.S. domestic issuers, it would make it more difficult and expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced coverage or incur substantially higher costs to obtain coverage. These rules and regulations could also make it more difficult for us to attract and retain qualified members of our board of directors.

We are an "emerging growth company," as defined in the U.S. Jumpstart Our Business Startups Act of 2012, or the JOBS Act. For as long as we continue to be an "emerging growth company," we may take advantage of exemptions from various reporting requirements that are applicable to other public companies that are not "emerging growth companies," including not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved. We may take advantage of these exemptions until we are no longer an "emerging growth company." We could be an "emerging growth company" for up to the last day of the fiscal year ending after the fifth anniversary of our initial U.S. public offering (June 2021), although circumstances could cause us to lose that status earlier, including if the aggregate market value of our ordinary shares held by non-affiliates exceeds $700 million as of any June 30 (the end of our second fiscal quarter) before that time, in which case we would no longer be an "emerging growth company" as of the following December 31 (our fiscal year-end).

We cannot predict if investors will find our ordinary shares less attractive because we may rely on the exemptions and reduced disclosure obligations applicable to emerging growth companies. If some investors find our ordinary shares less attractive as a result, there may be a less active trading market for our ordinary shares and our share price may be more volatile.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting obligations. In addition, any testing by us conducted in connection with Section 404 of the Sarbanes-Oxley Act, or any subsequent testing by our independent registered public accounting firm, may reveal deficiencies in our internal controls over financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our financial statements or identify other areas for further attention or improvement.

Inadequate internal controls could also cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of ADSs representing our shares or our shares.

Management is required to assess the effectiveness of our internal controls annually beginning with this annual report on Form 20-F to be filed with the SEC. However, for as long as we are an “emerging growth company” under the JOBS Act, our independent registered public accounting firm will not be required to attest to the effectiveness of our internal controls over financial reporting pursuant to Section 404 of the Sarbanes-Oxley Act. An independent assessment of the effectiveness of our internal controls could detect problems that our management’s assessment might not. Undetected material weaknesses in our internal controls could lead to financial statement restatements requiring us to incur the expense of remediation and could also result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

For U.S. federal income tax purposes, we generally will be classified as a passive foreign investment company, or PFIC, for any taxable year, in which, after the application of certain look-through rules with respect to our subsidiaries, at least 75% of our gross income is passive income, or at least 50% of the average value (determined on the basis of a weighted quarterly average) of our assets for the taxable year is attributable to assets that produce passive income or are held for the production of passive income, including cash. For purposes of these tests, passive income includes, among other things, dividends, interest, gains from commodities and securities transactions, the excess of gains over losses from the disposition of assets which produce passive income (including amounts derived by reason of the temporary investment of funds raised in offerings of our ADSs) and rents and royalties other than rents and royalties which are received from unrelated parties in connection with the active conduct of a trade or business. Generally, in determining whether a non-U.S. corporation is a PFIC, a non-U.S. corporation that directly or indirectly owns at least 25% by value of the shares of another corporation is treated as holding and receiving directly its proportionate share of assets and income of such corporation.

Based upon our analysis of the value of our assets and the nature and composition of our income and assets, we believe that we were a PFIC for the taxable year ended December 31, 2023. However, the determination of whether or not we are a PFIC for any taxable year is a factual determination made annually after the end of each taxable year, and because the applicable law is subject to varying interpretations, we cannot provide any assurance regarding our PFIC status and our U.S. counsel expresses no opinion with respect to our PFIC status for any taxable year. If we are characterized as a PFIC for any taxable year during which U.S. Holders (as defined in “Item 10. E Taxation – Material U.S. Federal Income Tax Consequences for U.S. Holders” below) hold our ADSs, U.S. Holders of our ADSs may suffer adverse tax consequences regardless of whether we continue to qualify as a PFIC, including having gains realized on the sale of our ADSs treated as ordinary income rather than capital gain, the loss of the preferential rate applicable to dividends received on our ADSs by individuals who are U.S. Holders, and having interest charges apply to certain distributions by us and gains from the sales of our ADSs.

The tax consequences that would apply if we are classified as a PFIC would be different from those described above if a U.S. Holder of our ADSs were able to make a valid qualified electing fund, or QEF, election, or, in some circumstances, a “mark-to-market” election. We currently expect to provide U.S. Holders of our ADSs with the information necessary to make a QEF election if we were treated as a PFIC for any taxable year, although there is no assurance that we will do so.

For further discussion of the PFIC rules and the adverse U.S. federal income tax consequences in the event we are classified as a PFIC, as well as certain elections that may be available to U.S. shareholders, see “Item 10. E Taxation – Material U.S. Federal Income Tax Consequences for U.S. Holders.”

We collect and maintain information in digital and other forms that is necessary to conduct our business, and we are increasingly dependent on information technology systems and infrastructure to operate our business. In the ordinary course of our business, we may process large amounts of confidential and sensitive data, including personal data (such as health-related data), intellectual property, and proprietary business information (collectively, sensitive information). We have also outsourced elements of our information technology infrastructure, and as a result a number of third-party vendors may have access to sensitive information. Our ability to monitor these third parties’ information security practices is limited, and these third parties may not have adequate information security measures in place. We may share or receive sensitive information with or from third parties.

Cyberattacks, malicious internet-based activity, and online and offline fraud are prevalent and have generally increased as the number, intensity and sophistication of attempted attacks and intrusions from around the world have increased. These threats come from a variety of sources, including traditional computer “hackers,” threat actors, personnel (such as through theft or misuse), sophisticated nation states, and nation-state-supported actors. Some actors now engage and are expected to continue to engage in cyber-attacks, including without limitation nation-state actors for geopolitical reasons and in conjunction with military conflicts and defense activities. During times of war and other major conflicts, we and the third parties upon which we rely may be vulnerable to a heightened risk of these attacks, including cyber-attacks that could materially disrupt our systems and operations, supply chain, and ability to produce, sell and distribute our products. Further, cyberattacks include AI-driven attacks, bypassing multi-factor authentication, supply chain and critical infrastructure vulnerabilities, targeted ransomware campaigns, identity attacks, machine learning and generative AI usage, deepfake and synthetic media attacks, and increased focus on small and mid-market businesses.

We and the third parties upon which we rely may also be subject to a variety of evolving threats, including but not limited to social-engineering attacks (including through phishing attacks), malicious code (such as viruses and worms), malware (including as a result of advanced persistent threat intrusions), denial-of-service attacks (such as credential stuffing), ransomware attacks, supply-chain attacks, software bugs, server malfunctions, software or hardware failures, loss of data or other information technology assets, adware, telecommunications failures, and other similar threats. Ransomware attacks, including by organized criminal threat actors, nation-states, and nation-state-supported actors, are becoming increasingly prevalent and severe and can lead to significant interruptions in our operations, loss of data and income, reputational harm, and diversion of funds. Extortion payments may alleviate the negative impact of a ransomware attack, but we may be unwilling or unable to make such payments due to, for example, applicable laws or regulations prohibiting such payments. Similarly, supply-chain attacks have increased in frequency and severity, and we cannot guarantee that third parties and infrastructure in our supply chain or our third-party partners’ supply chains have not been compromised or that they do not contain exploitable defects or bugs that could result in a breach of or disruption to our information technology systems or the third-party information technology systems that support us and our business operations.

In addition, the prevalent use of mobile devices that access confidential information increases the risk of lost or stolen devices and security incidents, which could lead to the loss of sensitive information. Remote work has become more common and has increased risks to our information technology systems and data, as more of our employees utilize network connections, computers and devices outside our premises or network, including working at home, while in transit and in public locations. Additionally, future or past business transactions (such as acquisitions or integrations) could expose us to additional cybersecurity risks and vulnerabilities, as our systems could be negatively affected by vulnerabilities present in acquired or integrated entities’ systems and technologies. Furthermore, we may discover security issues that were not found during due diligence of such acquired or integrated entities, and it may be difficult to integrate companies into our information technology environment and security program.

Any of the previously identified or similar threats could cause a security incident or other interruption. A security incident or other interruption could result in unauthorized, unlawful, or accidental acquisition, modification, destruction, loss, alteration, encryption, disclosure of, or access to our sensitive information. A security incident or other interruption could disrupt our ability (and that of third parties upon whom we rely) to conduct our business. For example, the loss of clinical trial data from completed or ongoing or planned clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data.

We may expend significant resources or modify our business activities (including our clinical trial activities) to try to protect against security incidents. Certain data privacy and security obligations may require us to implement and maintain specific security measures, industry-standard or reasonable security measures to protect our information technology systems and sensitive information.

While we have implemented security measures designed to protect against security incidents, there can be no assurance that these measures will be effective. We experience such security incidents of varying degrees from time to time, and we incur costs in protecting against or remediating such security incidents.

We take steps to detect and remediate vulnerabilities, but we may be unable in the future to detect vulnerabilities in our information technology systems because such threats and techniques change frequently, are often sophisticated in nature, and may not be detected until after a security incident has occurred. Despite our efforts to identify and remediate vulnerabilities, if any, in our information technology systems, our efforts may not be successful. These vulnerabilities pose material risks to our business. Further, we may experience delays in developing and deploying remedial measures designed to address any such identified vulnerabilities.

Applicable data privacy and security obligations may require us to notify relevant stakeholders of security incidents. Such disclosures are costly, and the disclosure or the failure to comply with such requirements could lead to adverse consequences. If we (or a third party upon whom we rely) experience a security incident or are perceived to have experienced a security incident, we may experience adverse consequences. These consequences may include governmental enforcement actions (for example, investigations, fines, penalties, audits, and inspections), additional reporting requirements and/or oversight, restrictions on processing sensitive information (including personal data), litigation (including class claims), indemnification obligations, negative publicity, reputational harm, monetary fund diversions, interruptions in our operations (including availability of data); financial loss; and other similar harms.

Our contracts may not contain limitations of liability, and even where they do, there can be no assurance that limitations of liability in our contracts are sufficient to protect us from liabilities, damages, or claims related to our data privacy and security obligations. We cannot be sure that our insurance coverage will be adequate or sufficient to protect us from or to mitigate liabilities arising out of our privacy and security practices, that such coverage will continue to be available on commercially reasonable terms or at all, or that such coverage will pay future claims.

The trading market for the ADSs and our ordinary shares depends in part on the research and reports that securities or industry analysts publish about us or our business. If no or too few securities or industry analysts cover us, the trading price for the ADSs and our ordinary shares would likely be negatively affected. If one or more of the analysts who cover us downgrade the ADSs or our ordinary shares or publish inaccurate or unfavorable research about our business, the price of the ADSs and our ordinary shares would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for the ADSs and our ordinary shares could decrease, which might cause the price of the ADSs and our ordinary shares and trading volume to decline.

The market price of our ordinary shares has been and may continue to be volatile. Companies that have experienced volatility in the market price of their ordinary shares are often subject to securities class action litigation. For example, in July 2022, a securities class action complaint was filed in the U.S. District Court for the Southern District of New York against us, our directors and certain of our current and former executive officers. After several proceedings, on February 29, 2024, the court ordered the case closed. However, any future securities litigation could result in substantial costs and diversion of management’s attention and resources, which could adversely impact our business. Any adverse determination in litigation could also subject us to significant liabilities. See Part I, Item 8.A “Consolidated Statements and Other Financial Information – Legal Proceedings” for more information.

Our corporate name is Molecular Partners AG. We were incorporated in Switzerland as an Aktiengesellschaft, or AG, on November 22, 2004 and are subject to article 620 et seq. of the Swiss Code of Obligations. Our principal executive offices are located at Wagistrasse 14, 8952 Schlieren, Switzerland. We are registered with the commercial register of the Canton of Zurich under number CHE-112.115.136. In November 2014, we completed the initial public offering of our ordinary shares on the SIX Swiss Exchange. In June 2021, we completed the initial public offering of our ADSs on the Nasdaq Global Select Market. Our telephone number at our principal executive offices in Switzerland is +41 44 755 77 00.

Molecular Partners AG is the sole shareholder of Molecular Partners Inc., a Delaware corporation, with a registered office at 245 Main Street, Cambridge, Massachusetts 02142, with a secondary address at 33, Bradford Street, Concord, Massachusetts 01742. Molecular Partners Inc. is our agent for service of process in the United States.

Our website address is www.molecularpartners.com. The reference to our website is an inactive textual reference only and information contained in, or that can be accessed through, our website or any other website cited in this registration statement is not part of this Annual Report on Form 20-F. The SEC maintains a website at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

We are a clinical-stage biotechnology company pioneering the design and development of DARPin therapeutics for medical challenges that other drug modalities cannot readily address. We have programs in various stages of preclinical and clinical development, currently with main focus on oncology. DARPin (Designed Ankyrin Repeat Protein) therapeutics are a new class of custom-built protein drugs based on natural binding proteins that have the potential to unlock new dimensions of multi-functionality and multi-target specificity in drug design. Our DARPin platform allows us to generate candidates with multiple mechanisms of action, or MoAs, - such as immune cell engagers and radiotherapy - to address complex biological problems. We believe the DARPins' flexible architecture, intrinsic potential for high affinity and specificity, small size and high stability offer benefits to drug design over other currently available protein-based therapeutics.

Our DARPin candidates have been extensively tested in preclinical studies and clinical trials, including in more than 2,500 patients, and have been observed to be highly active and generally well-tolerated.

Leveraging our DARPin platform, we have designed product candidates with multiple MoAs that we believe have the potential to offer patients therapeutic options with higher efficacy and fewer adverse events as compared to the current standard of care. Among these multiple MoAs, DARPin product candidates have been designed to block growth factors, localize activity, conditionally activate immune cells, deliver cytotoxic payloads and radionuclides, neutralize viruses, adjust half-life as needed, and initiate cell death. We apply these features across our portfolio to elicit a specific therapeutic response.

We believe that our DARPin platform has the potential to yield novel product candidates with broad therapeutic applications given their ability to overcome many of the limitations of antibody and other conventional protein-based therapeutics. By harnessing DARPins’ intrinsic advantages and leveraging our two decades of experience and leadership with DARPins, we believe our DARPin platform can close the gap between small molecule and antibody medicines as a new therapeutic modality poised to offer clinical breakthroughs.

We believe our DARPin therapies have the potential to address defined medical problems that are not addressable by other drug classes. We currently remain focused on oncology through our robust pipeline of clinical and preclinical programs, with particular attention to MP0533 for the treatment of acute myeloid leukemia, or AML, the Radio-DARPin Therapy, or RDT, platform and pipeline, and the multispecific cKIT x CD16a x CD47 Switch-DARPin program and other next-generation immune cell engagers leveraging the Switch-DARPin platform.

Our pipeline chart as of March 2024 is illustrated below:

*The co-development agreement with Orano Med includes up to three potential oncology targets including DLL3.

While our DARPin candidates have distinct therapeutic features and particular targets, each DARPin therapeutic modality can be utilized across multiple programs. Our pipeline programs benefit from the learnings of earlier discoveries, such as:

•The use of fibroblast activation protein, or FAP, as a localized activator for MP0317, and previously MP0310;

•Multi-specificity and avidity-driven selectivity to boost tumor specificity for our candidate MP0533, a tetra-specific T cell engager for AML;

•"Stealth DARPins" whereby the DARPin backbone surface is engineering and which are used in our Radio-DARPin programs, allowing for reduced kidney accumulation; and

•Switch-DARPins, that combine two distinct target specificities on a single DARPin domain, resulting in targeted and conditional effector functions and safer systemic delivery, as seen in our cKIT x CD16a x CD47 multispecific program as next generation conditioning regiment for HSCT (hematopoietic stem cell transplantation, or HSCT).

We have strategic collaboration agreements with Novartis, Orano Med, and other third party collaborators.

We were founded in 2004 by the inventors of our DARPin platform. Our senior management, which includes two of our company’s co-founders, have significant prior experience in oncology, research, drug development and finance. Members of our team have served as senior executives at other well-established companies including Amgen, Bavarian Nordic, GSK, Genentech, J&J, Novartis, Roche and Tesaro. Additionally, our board of directors includes current and former senior executives of AbbVie, Biogen, Novartis, Roche and Takeda (Millennium Pharmaceuticals, Shire).

As our name indicates, partnership and collaboration are at the core of our company, our research activities and our therapeutic designs. Molecular Partners embodies an international working environment comprised of over 165 individuals from numerous disciplines who contribute to our shared values of scientific excellence, respectful teamwork and personal aspiration. Stemming from our long-standing goal of improving the lives of patients with cancer, we are a group dedicated to moving the needle of medicine. We foster true innovation and creative thinking to advance our therapeutic product candidates, and we continue to be inspired by the difference we can make for our patients. Our team members possess a curiosity and a passion to advance our shared goal of providing better treatment options for patients with serious diseases.

We are committed to leveraging our proprietary platform to design DARPin-unique solutions for challenges other therapies cannot readily address. DARPins have several intrinsic properties that differentiate them from other modalities. We combine these unique properties with insights from our deep clinical experience and understanding of underlying disease biology to create molecules that offer new solutions to patients with high medical need and that can be tested in preclinical models with translatable value. Key aspects of our strategy include the following:

a.Rapidly advance our tetra-specific T-cell engaging DARPin, MP0533, for the treatment of patients with AML and high-risk MDS. Presently in a Phase 1/2a clinical trial, we plan to establish the safety and tolerability profile of the program, and aim to identify a therapeutic dose level for additional clinical evaluation. Once a dose level is identified, we intend to quickly expand our clinical trials to evaluate which patients may derive the most benefit from MP0533.

b.Unlock novel biological solutions and expand therapeutic applications of clinically validated DARPin approaches. As the inventors of the DARPin class of drugs, we believe we are the world leaders in DARPin engineering and research. With this expertise, we have developed a strategy of unlocking various technical hurdles which may limit other discovery platforms, and then expanding our clinical product candidates based upon each technological solution. Examples of this include the tumor-localized activation of our oncology program MP0317, the avidity-driven mechanism of MP0533, the "Stealth DARPin" which we invented to reduce kidney accumulation of our radio-pharmaceutical programs, and the Switch-DARPin which enables a logic-gated, conditional activation of immunity.

c.Continue to optimize and expand our pipeline of Radio-DARPin Therapeutics (RDTs). Significant efforts have been put into demonstrating both reduced kidney accumulation, and increased tumor accumulation of our RDTs. These platform learnings will allow us to explore multiple tumor targets not readily addressable by other therapeutic platforms. This is intended to be demonstrated by our DLL3 program, as well as other targets which we plan to introduce in 2024 and the coming years.

d.Continue a strategic approach to in-house versus partnered development. To unlock and expand the full potential of our DARPin platform, we intend to independently develop and commercialize product candidates in our core focus areas, where we believe we have an established clinical and regulatory approval pathway and the resources to commercialize successfully. To complement this approach, we also plan to collaborate with biopharmaceutical companies on product candidates that have promising utility in target areas or patient populations requiring greater global development capabilities or those outside of our strategic focus.

i.This strategy has allowed us to pursue major therapeutic innovations for the DARPin platform, often in parallel, across our oncology and virology focus areas. To this end, we continue to support our partners across our portfolio as we advance our Radio DARPin-Therapy Platform, both independently and in collaboration with Novartis and Orano Med; and our research collaboration with the University of Bern for MP0533.

ii.We will also seek to collaborate with companies developing complementary technology to our platform when we see the strategic rationale to combine our industry-leading DARPin capabilities with other modalities. This is shown in our partnership with Orano Med. Both MP and Orano Med have agreed to co-develop multiple 212Pb-based Radio-DARPin Therapies using Orano Med's capabilities in Targeted Alpha Therapy as the cell killing isotope to attack solid tumors. The DLL3 program is the first target in the Orano Med collaboration.

Our DARPin platform was invented over twenty years ago by the co-founders of our company, who were then researchers at the University of Zurich. DARPin molecules were discovered as a result of our co-founders’ quest to find a versatile protein-based therapeutic class that was highly differentiated from antibodies. The ability to design multi-specific molecules, along with the ease of use and manufacturing, made the DARPin technology an ideal platform for us from which to develop treatments beyond traditional protein therapeutics. The foundational technology we use in our DARPin platform to generate our product candidates was initially licensed to us by the University of Zurich. Leveraging our DARPin platform, we have designed product candidates with MoAs that we believe have the potential to offer therapeutic options to patients with higher efficacy and fewer adverse events compared to the current standard of care. Among these multiple MoAs, DARPin product candidates have been designed to block growth factors, localize activity, conditionally activate, neutralize viruses, adjust half-life as needed and initiate cell death. We apply these features across our portfolio to elicit a specific therapeutic response.

For more than two decades, we have pioneered DARPins as a new class of therapeutics, evolving our capabilities and mastery of DARPin design with an increasing focus on novel platforms and MoAs that are highly differentiated from other drug classes. The intrinsic advantages of DARPins include:

•Derivation from natural binding proteins:

•DARPins are based on natural protein binders that mediate protein interactions in most living cells: ankyrin repeat domains. Evolved by nature and engineered by us, we believe ankyrin repeat domains are the ideal foundation for an efficient, versatile and innovative approach to biologic drug design. An individual DARPin is a radically simple unit consisting of a robust backbone, or scaffold, supporting a binding surface that is shaped to bind its target with exquisite precision and strength. Unlike larger, more complex binding proteins, the basic repeating unit can be engineered against a vast array of different targets with very low risk of off-target effects or interactions outside the binding surface.

•High affinity and specificity:

◦DARPin’s intrinsic potential for high affinity and high specificity mean DARPin candidates can tightly bind to their targets. This binding strength is matched by the specificity of DARPins to bind only to the intended target, limiting the potential of off-target effects.

• Small size:

◦Even when linked together, multispecific DARPins are smaller than large proteins such as antibodies, which allows a potentially greater tissue penetration. Additionally, every dose given to a patient contains more molecules per gram than larger molecules like antibodies.

•Multispecificity:

◦DARPins can be used in a radically simple format with single-target specificity or can be easily be linked together to enable multispecific drug candidates. DARPin candidates comprised of up to six DARPins and five target specificities have been tested in the clinic without impacting affinity, potency, stability, or production yields compared to the single DARPin units.

•“Either-or” specificity:

◦The repeat structure of DARPins allows to fuse two different DARPins with different target specificities into one DARPin domain thereby enabling mutually exclusive, “Either-Or” binding properties for either of the targets. We believe this opens the possibility of creating “smart drugs” that are conditionally activated only where activity is desired.

•High stability:

◦The very high stability intrinsic to DARPins allows novel engineering approaches, such as those applied to the DARPin backbone surface enabling the Stealth-DARPin design developed for RDT, without impact on the structure and binding characteristics of the engineered DARPins.

We believe that our DARPin platform has the potential to yield novel product candidates with broad therapeutic application given their ability to overcome many of the limitations of antibody and other conventional protein-based therapeutics.

We believe the benefits of our DARPin platform include:

•Ability of DARPin product candidates to target multiple escape pathways in parallel When cancer cells or a virus are targeted by conventional therapies, they often develop resistance by loss of target, mutational escape or activating multiple escape pathways at once. To create effective products, we believe that we must understand the dynamics of these escape pathways and then target their key components in parallel. We believe our DARPin product candidates are ideally suited for this approach because of their ability to bind to multiple targets and inhibit multiple escape pathways at once. Our approach allows us to efficiently test product candidates to determine the affinity and target binding of our DARPin proteins in the relevant setting. The most effective combination of DARPin proteins is assembled into one DARPin product candidate for further product development. These DARPin product candidates can demonstrate cooperative binding, leading to high potency and preventing escape.

•Capacity to find and address new biology on known targets
Using our DARPin approach, we are able to select DARPin proteins that bind to known targets in novel ways, thereby unlocking additional therapeutic solutions. For example, we can achieve conditional activation where the molecule will activate only in the presence of a particular tumor-associated antigen, or TAA. One of our product candidates, MP0533 utilizes the power of multi-specific targeting to potentially enhance efficacy and minimize tumor resistance through simultaneously targeting three known antigens associated with AML, which, to our knowledge, had not previously been addressed in one molecule. In addition, the RDT platform highlights the potential to use DARPins specifically tailored for use with radio-isotopes, can potentially expand the universe of targets for the treatment of cancer with radiotherapy.

•Flexible architecture to engage and locally activate immune cells
Immune-mediated therapies rely on the activation of a patient’s immune response to fight tumors. In some cases, blocking negative checkpoint signals can produce a deep and durable effect in stopping the growth of, and regressing, tumors. We believe that our DARPin platform is well suited for the combined approaches of blocking negative checkpoint signals and engaging and activating immune cells. We have unlocked approaches that utilize DARPins to direct tumor-localized activation of immune cells, resulting in the selective activation of immune cells within a tumor, which may potentially avoid systemic adverse events. Previously, we have designed two of our DARPin product candidates, MP0310 and MP0317, to cluster, thereby locally activating immune cells more effectively. MP0310 is a tumor-restricted 4-1BB immune-cell activator for the potential treatment of FAP-positive cancers, and MP0317 activates CD40, also in an FAP-dependent manner. Our current Phase 1 program for the treatment of AML and MDS, MP0533, has shown initial clinical activity with our first T-cell engaging CD3 DARPin. Since demonstrating this initial activity, the use of CD3 DARPins in future programs could prove highly useful in treating cancers. Additionally, our Switch-DARPin platform uses a dual-binding logic-gated DARPin (i.e. the Switch) to provide an "on/off" function to the multispecific DARPin candidate. The Switch function is modulated according to the presence of defined targets as well as their relative proximity and affinity to the Switch, thereby allowing conditional activation of targets. The goal of the Switch-DARPin platform is the activation of a highly specific targeted immune response.

•High stability and microbial manufacturing to enable high yields at scale
All or our DARPin product candidates are constructed to benefit from high-yield microbial manufacturing. Unlike manufacturing using mammalian cell lines, productions of DARPin molecules via microbial manufacturing allow for several key competitive advantages, including the ability to manufacture clinical batches every seven to ten days, versus a thirty-day mammalian campaign. This advantage is critical to allow drug supply on a global scale. Additional benefits include high production yield of raw drug substance, 12-15g/L for example, as well as high thermal stability, with certain programs demonstrating shelf stability at 4 degrees centigrade for several years.

The fundamental building block for all of our DARPin product candidates is the single DARPin protein. A DARPin protein consists of an engineered protein base structure, which we refer to as the scaffold. The DARPin scaffold is formed from consecutive copies of ankyrin repeat proteins, which are chains of 33 amino acids stacked together. The scaffold can be generated to provide a binding site to specifically recognize, or permit binding to, a desired target protein or other molecule, similar to how monoclonal antibodies can be generated to recognize a single target antigen.

We have developed and upgraded our libraries to include over one trillion DARPin proteins, each of which can potentially bind to a specific target structure. From this library we can screen and select DARPins within weeks that are highly specific and have high affinity for any given target structure. We use these selected DARPins to build our product candidates.

DARPins are small, with a molecular weight of approximately 14–18 kilodaltons, or approximately the tenth of the size of a monoclonal antibody. We believe this smaller size enables increased tissue penetration and a higher potency at lower doses. The natural biophysical properties of DARPins, including high affinity due to the rigidity of the scaffold and high solubility of the base structure, enable more distinct specificity for a particular target, or a specific site on a particular target, such as an epitope. These benefits have the potential to increase activity and efficacy of our product candidates for their targets.

We can select DARPins to bind to a given target and form the basis of a product candidate, or we can genetically assemble DARPins into DARPin product candidates using different linkers. This allows us to screen our libraries that contain over one trillion DARPins to select those with the optimal properties. We believe this process is more difficult with multi-specific antibodies or other complex proteins. Further, we can add additional elements either to increase the half-life of our product candidates to match the therapeutic need or to add functionality. While antibodies generally have a long systemic half-life, most repeat proteins have a short half-life. The half-life of a single DARPin is usually a few hours when injected into the blood stream. To increase the half-life of DARPin product candidates, we have created multiple proprietary, patent protected, specific DARPins that bind to human serum albumin, or HSA. HSA is the most abundant protein in human blood and has a half-life of approximately three weeks. When administered intravenously, the HSA-DARPin binds to its target to extend its half-life to the same period as HSA. This approach allows us to tailor the half-life of our individual product candidates.

Our accumulated preclinical and clinical experience of developing and testing DARPin candidates has allowed us to establish an intellectual property portfolio that, as of December 31, 2023, included over 200 granted patents and over 200 additional pending U.S. and foreign patent applications across more than 30 patent families, covering both core and derivative aspects of our DARPin platform.

The rapid development of immune-mediated therapies for multiple types of cancer has transformed the oncology treatment landscape and improved the long-term outlook for many cancer patients. Rather than targeting treatments directly at the tumor, these therapies generally engage the immune system to promote its recognition and eradication of tumor cells. Key features of immune-mediated therapy include specificity, breadth of response, and memory. These features can contribute to complete tumor regressions, often providing more durable clinical outcomes and improved quality of life relative to other therapies. However, despite the early success observed with immune mediated therapies, it has become clear that these treatments can currently help only a minority of patients and are more effective in some tumor types than others. This limit arises from various factors, including differential target expression patterns by cancer cells (and expression thereof on healthy cells), variable immune responses to the treatment, and cancer immune-escape via mutagenesis and proliferation of non-targeted cellular populations and an immune-suppressive tumor microenvironment.

We believe that, through years of building our DARPin expertise, we have developed DARPin candidates that can unlock and expand these immune-mediated capabilities through several mechanisms, which include targeting immuno-stimulatory proteins through multi-specific DARPin candidates and using delayed and/or conditional activation of our immune engagers. These attributes allow us to optimize the potency, localization and/or exposure of our product candidates and reduce the risk of off-target toxicity in order to improve their therapeutic index and overall profile.

We are currently developing and assessing two oncology product candidates which activate immune cells at the tumor site:

•MP0533, which targets CD3, CD70, CD123 and CD33 for the treatment of AML and MDS;

•MP0317, which allows for tumor-restricted immune-cell CD40 activation for the treatment of FAP positive cancers;

Development of our MP0317 and MP0533 product candidates has leveraged the learnings from our first-generation product candidates in our oncology program, MP0250, MP0274 and MP0310. Those candidates have shown efficacy and tolerability in preclinical studies and clinical trials in patient populations who were resistant and /or refractory to previous standard of care treatments.

However, MP0317 and MP0533 both utilize novel mechanisms of action, which may result in greater research and development expenses, regulatory issues that could delay or prevent approval, or the discovery of unknown or unanticipated adverse effects. See “Risk Factors—Risks Related to the Development and Clinical Testing of Our Product Candidates—Some of our product candidates utilize a novel mechanism of action which may result in greater research and development expenses, regulatory issues that could delay or prevent approval, or discovery of unknown or unanticipated adverse effects.”

MP0533: DARPin Product Candidate Targeting CD3, CD70, CD123 and CD33 for the Treatment of AML (r/r AML and AML/MDS)

MP0533 is our novel tetra-specific T cell-engaging DARPin, which simultaneously targets the antigens CD33, CD123 and CD70 on AML cells as well as the immune activator CD3 on T cells.

The unmet medical need in AML remains high. Despite the achievement of remission for a majority of patients, up to 70% of adults and 30% of children will not survive beyond five years after initial clinical response due to relapsing disease. Further, the treatment of relapsed/refractory AML, or r/r AML, is therapeutically challenging due to high relapse rates with current standard of care treatments and the aggressive nature of the disease. Currently, a variety of highly potent mono-targeting TCE (T cell engager) and CAR-T therapies have entered clinical development, but those therapies are often accompanied by dose limiting toxicities, such as cytokine release syndrome, or CRS, and myelotoxicities, preventing dose escalation to induce robust anti-tumor efficacy. More selective therapies addressing the growing number of subclasses and rationally designed target combinations are needed to allow for extended dose escalation with a more acceptable safety profile and to achieve more durable responses.

In AML, leukemic stem cells, or LSCs, produce all the leukemic cells in the patient and therefore a lasting cure for this disease is dependent on eradication of these cells. However, LSCs are relatively resistant to standard therapies. For example, these cells are less sensitive to killing by daunorubicin and cytarabine, two commonly used chemotherapeutic agents. This is partially due to increased expression by LSCs of multidrug resistance genes, and also to their quiescent state, which reduces the effects of cytotoxic agents that target rapidly replicating cells. It is therefore essential to target LSCs, in addition to AML blasts, to achieve durable disease control.

Some cancer antigens are also present on many healthy cells, but at a lower density, and as such it is difficult to select any single target to sufficiently differentiate between cancer cells and healthy tissue. To overcome this limitation and increase specificity, we leveraged our unique DARPin platform to generate a multi-specific T-cell engager (TCE) DARPin molecule, targeting CD33, CD70 and CD123, by a fine-tuned and tailored avidity-driven affinity to these TAAs, in conjunction with our CD3-binding DARPin molecule.

In avidity-driven selectivity, the presence of two or more binding targets on the cell, and the molecular interaction with these targets increases the effective concentration of the binder and the resulting binding strength. This dependency of binding strength on the presence of more than one cancer antigen conveys a far superior selectivity to these multi-specific binders. This approach is a concept that is well known in the scientific community but has so far been limited by the availability of an optimal therapeutic platform to address the associated technical challenges. In order to find the right target combination, the optimal affinity to increase tumor specificity via avidity, as well as the best molecular architecture, we took advantage of our unique modular DARPin platform and screened thousands of combinations of multi-specific DARPin molecules, binding simultaneously to the three different TAAs — CD33, CD70 and CD123. We combined our three TAA-binding DARPins with our CD3-binding T-cell engaging DARPin into our candidate, MP0533.

Our approach allows for the design of multi-specific TCEs which are designed to simultaneously target CD33, CD70 and CD123, three well-known AML antigens that are co-expressed on approximately 50% of AML cells and of which at least two are expressed on approximately 70% of AML cells. Healthy cells generally express only one or none of these TAAs. To further optimize our molecules, we have devised a concentration dependent MoA utilizing moderate affinity binders rather than high affinity ones. When such a DARPin encounters a cell expressing only one antigen, we believe there should only be a transient interaction and the DARPin should quickly disengage the target with limited cytotoxic effect. However, when there are two or three targets, the mechanism of avidity driven selectivity is activated.

In preclinical tests against AML cells, we observed MP0533 delivered highly potent and specific activity and the potential for a reduced effect on healthy normal cells. As well as its increased selectivity, MP0533's ability to target three TAAs simultaneously gives it additional potential to counteract target escape mechanisms expected due to tumor heterogeneity. In addition, this mechanism is designed to capture a larger population of AML patients due to its ability to engage with any two of these targets simultaneously, while maintaining specificity.

In December 2021, we announced a research collaboration with the University of Bern, to advance the development of MP0533, into the clinic. The collaboration aims to leverage our DARPin technology and the University of Bern group’s expertise in AML, and specifically in LSCs.

In an oral presentation at the 64th American Society of Hematology (ASH) Annual Meeting in December 2022, we presented preclinical results showing MP0533 can induce preferential killing of cells expressing two or three tumor-associated antigens, or TAAs, compared to cells expressing a single TAA.

In January 2023, the first patient was dosed in our Phase 1/2a clinical trial of MP0533 for patients with r/r AML and AML/MDS. In December 2023, we presented positive initial data from the first four dosing cohorts at the 65th American Society of Hematology (ASH Annual Meeting and Exposition. The results from the first 11 patients treated with MP0533 indicated an acceptable safety profile as of the data cut-off across all four dosing regimens, or DRs, with no dose-limiting toxicities observed. The most frequently reported MP0533-related adverse events were infusion-related reactions and CRS (all Grade 1-2). Two responders were observed at the time of presentation, including a patient achieving complete response (CR) in DR 4 and another patient with morphological leukemia-free state (MLFS) in DR 3. These responses are particularly notable for having occurred at dose levels below those predicted as therapeutically active.

The Phase 1/2a clinical trial is currently on track with dosing in DR 6 currently ongoing. We expect to present data from further cohorts receiving MP0533 in the first half of 2024. Based upon current safety and tolerability data from the ongoing trial as well as discussions with treating investigators and key opinion leaders, we intend to file a protocol amendment to expand enrollment to additional higher dose cohorts of MP0533 beyond the initially planned highest cohort (DR 7). The goal of the additional higher doses will be to explore the full potential efficacy of MP0533. We expect to enroll patients in the added higher cohorts in the second half of 2024.

•Designed to activate CD40 only in FAP-high tumor tissue.

•Localized activation by FAP targeting underpins the therapeutic benefits while expanding the range of immune cell activation.

•Designed to reinforce the effect of other immune stimulating therapies.

•Positive interim Phase 1 clinical trial data presented at ASCO in the second quarter of 2023.

•Additional positive dose-escalation data from the Phase 1 clinical trial in patients with advanced solid tumors presented at the Society for Immunotherapy of Cancer, or SITC, in the fourth quarter of 2023.

The tumor-localized immune agonist MP0317 is one of our product candidates currently being developed in our oncology pipeline. MP0317 comprises a localizer to FAP and immune stimulator binding to CD40. FAP is found in the tumor stroma in high density and its binding is intended to create a cluster of CD40 on immune cells enabling immune activation.

MP0317 is designed to simultaneously engage FAP and CD40 to create tightly bound clusters around tumors, which are necessary to induce CD40-mediated local immune activation. CD40 plays a critical role in antigen presentation and the monocyte maturation process, and therefore, indirectly, T-cell activation. One of the main functions of CD40 signaling is to enhance antigen-presentation to T-cells by activating dendritic cells, or DCs. CD40 engagement on the surface of DCs promotes cytokine and chemokine production, induces expression of costimulatory molecules, and facilitates the cross-presentation of antigens. This step increases the interaction of DCs with T-cells by upregulating surface proteins such as CD54 and CD86, thereby activating the surface proteins.

Agonist anti-CD40 antibody treatments have been associated with mild to moderate toxicity in the clinic, which we believe is related to on-target but off tumor effects causing CRS and liver toxicity.

Aiming to avoid CD40-related toxicity, we developed MP0317 to work as a locally activated CD40 engager, designed to only activate the immune system when both FAP and CD40 are simultaneously engaged. We expect this localizing mechanism to reduce the likelihood of extra-tumoral systemic side effects and allow an increase of the therapeutic index.

In November 2021, we announced the first patient had been dosed in our Phase 1 clinical trial evaluating the safety and tolerability of MP0317. The open-label dose escalation study is designed to assess the safety and tolerability as well as pharmacokinetics and pharmacodynamics of MP0317 as a monotherapy in patients with solid tumors known to express fibroblast activation protein (FAP) and CD40.

In November 2023, we presented additional positive dose-escalation data from the Phase 1 clinical trial of MP0317 in patients with advanced solid tumors at the 38th Annual Meeting of SITC. These data from 46 patients supported our earlier reported findings at the 2023 ASCO Annual Meeting of MP0317-induced CD40 activation and related remodeling of the tumor microenvironment. At the time of the presentation, MP0317, as a monotherapy, continued to display a favorable safety profile across all dosing cohorts up to the highest planned dose (0.03-10 mg/kg in every 3-weeks or weekly schedules).

Enrollment in the Phase 1 clinical trial of MP0317 has concluded. We expect to report the full dataset from the Phase 1 dose-escalation trial in the first half of 2024.

Radiation therapy, particularly external beam radiation, is a frequently used approach to treating cancer. Due to its limited selectivity, this treatment can only be considered for localized or oligometastatic disease: radiation therapy often affects healthy tissues resulting in harmful side effects, which limits the amount of radioactivity that can be given to a patient. As a consequence, hard-to-reach tumor lesions or micrometastases are left untreated resulting in progression or relapse of the disease. Targeted radiotherapies delivering radioisotope selectively to the tumor while sparing healthy tissues have continue to make significant progress with positive clinical results. A key limiting factor in expanding this treatment modality to a broad range of relevant cancer types is the lack of vectors matching targeted radiotherapy requirements and spanning a broad tumor target space.

Our Radio-DARPin Therapy (RDT) platform represents a unique targeting approach for highly effective and selective delivery of radioactive payloads to a broad range of tumors while sparing healthy tissues. The unique nature of DARPins as an engineered protein drug class may allow us to overcome the limitations of other radioligand therapies. DARPins have great intrinsic properties as vector – such as small size, high affinity and specificity – to enable robust, tumor-specific delivery of therapeutic radionuclides.

We have built on these innate advantages by making further engineering advancements across our RDT portfolio. We have designed our candidates to minimize kidney retention, one of the key challenges of the broader radiotherapy class, through our use of Stealth-DARPins— DARPins whose backbone is surface engineered to be excreted by kidneys in urine instead of being re-absorbed. These results were presented at several conferences in 2023 including AACR and at SNMMI. Building on these results, we established a half-life engineering (HLE) toolbox which led to increased tumor uptake across multiple tumor targets, which we presented at EANM 2023 and at the J.P. Morgan Healthcare Conference in January 2024.

Taken together, our half-life engineering (HLE) toolbox combined with Stealth-DARPin technology has enabled us to reach improved tumor uptake and reduced kidney reabsorption, which supports expansion of the RDT pipeline and the development of a first generation of RDT pipeline candidates, including for Delta-like ligand 3 (DLL3). We presented relevant data on our DLL3 RDT program in January 2024.

In December 2021, we announced a new collaboration with Novartis in the form of a license and collaboration agreement to develop, manufacture and commercialize DARPin-based radiotherapeutics. By harnessing the power of radioactive atoms, or radionuclides, and applying it to cancers through targeted radioligand therapy, DARPin-based radiotherapeutics have the potential to selectively deliver molecularly targeted radiation to tumor cells anywhere in the body, while sparing healthy tissue. DARPins have significant potential to enable robust, tumor-specific delivery of radionuclides owing to their small size in combination with high specificity and affinity.

The collaboration combines our industry-leading ability to rapidly generate high-affinity DARPins and the radioligand therapies, or RLT, capabilities and expertise of Novartis. Under the terms of the agreement, we will collaborate with Novartis to discover DARPin-based radiotherapeutic candidates that target specific tumor associated antigens.

Novartis is responsible for all clinical development and commercialization activities. Under the terms of the agreement, we received a $20 million upfront payment from Novartis in January 2022, and are entitled to total potential development, regulatory and commercialization milestone payments of up to $560 million based on future achievements, and up to low double-digit percent of royalties to the extent that sales occur.

Furthermore, in January 2024, we entered a strategic collaboration with Orano Med to co-develop 212Pb-based RDTs for patients with solid tumors. The deal combines the power of DARPins, as a highly differentiated modality for tumor-targeted delivery of radioisotopes, with Orano Med’s leading capabilities in Targeted Alpha Therapy and supply to further advance our RDT platform and expand our RDT portfolio. 212-Pb has ideal properties for radiotherapeutic applications: a very clean decay chain, which releases one high-energy alpha particle, and relatively short decay half-life of 10.6 h, which ensures that the majority of the radioactivity is deposited at the tumor site resulting in efficient cancer cell killing. The short half-life is also beneficial for waste management.

The tumor-associated protein Delta-like ligand 3 (DLL3) was selected as the target of our lead RDT program to be advanced into IND-enabling studies in the first half of 2024. Expression of DLL3 is low in healthy tissues but significantly increased in certain tumor types, providing an opportunity for selective targeting through the high affinity and specificity offered by DARPins.

The initiation of clinical studies and first-in-human data are expected in 2025 through our co-development agreement with Orano Med. We also expect to nominate additional targets and RDT candidates in 2024.

Our Switch-DARPin platform represents a further evolution of our capabilities to deliver multispecific candidates to address different disease needs. It uses a dual-binding logic-gated DARPin (the Switch) to provides an "on/off" function to the multispecific DARPin candidate. The Switch’s function is modulated according to the presence of defined antigens as well as their relative proximity and affinity to the Switch. The goal of the Switch-DARPin platform is the activation of a targeted immune response.

In 2023, we debuted our Switch-DARPin platform and presented data supporting its mechanism of action at PEGS 2023. In January 2024, we introduced the first multi-specific program from the platform targeting the proteins cKIT, CD16a and CD47.

The multispecific cKIT x CD16a x CD47 Switch-DARPin program is designed to induce exhaustive killing of stem cells that express cKIT to optimize the outcomes of current high- or reduced-intensity conditioning and HSCT for AML patients. The program thereby strives to further increase long-term disease control post HSCT for AML patients eligible for high-intensity induction therapy, including those with a poor cytogenetic risk profile. It may also provide an alternative approach with a better safety profile for patients currently not eligible for standard high-intensity conditioning.

The intent is to extend the access to potentially curative HSCT for more patients with AML and beyond, including the potential to treat patients with severe autoimmune disease and those receiving certain cell-based therapies.

The target-by-target rationale for this program’s design is:

•cKIT is critical for stem cell maintenance and renewal and thus expressed on both hematopoietic and leukemic stem cells.

•The CD16a DARPin engages NK cells and macrophages to selectively kill cKIT-positive cells.

•The Switch-DARPin conditionally blocks the CD47 “don’t eat me” signal in the presence of cKIT, leveraging the power of CD47 inhibition without its associated toxicity to healthy cells.

We expect to present initial preclinical data from the first Switch-DARPin program in the first half of 2024 and to run preclinical proof-of-concept studies in the second half of 2024, which should provide strong translational efficacy data.

Our continued expansion of our capabilities and those of our DARPin candidates is due in part to our deep clinical experience with DARPin programs, across development stages through to the registrational phase. Our work today is informed by the past development of abicipar, a product candidate for the treatment of neovascular age-related macular degeneration and Diabetic Macular Edema; ensovibep, our trispecific candidate for COVID-19; and MP0310, which we designed to target both localizing target fibroblast activation protein (FAP) on tumor cells and 4-1BB, an immune modulatory protein on T cells. All programs showed activity and an acceptable safety profile in the clinic. These programs are no longer in active development.

In January 2024, Novartis returned the rights to the ensovibep program, previously under investigation for the treatment of COVID-19, to Molecular Partners. Clinical work on the ensovibep program ended in 2022 and the program remains terminated.

Our success depends in part on our ability to obtain, maintain, enforce and defend patents and other intellectual property and proprietary protection for our product candidates and technology, to preserve the confidentiality of our trade secrets, to operate without infringing, misappropriating or otherwise violating patents and other proprietary rights of others, and to prevent others from infringing, misappropriating or otherwise violating our patent and other proprietary rights. We seek to protect our proprietary position by, among other methods, filing patent applications covering our proprietary technology, improvements thereof, product candidates, and other inventions in Europe, the United States, and Japan, as well as in other relevant jurisdictions that are important to the development of our business, including Australia, Canada, South Korea and China. To protect aspects of our business that are not amenable to, or that we do not consider appropriate for, patent protection, we rely on trade secrets, know-how, confidential information and continuing technological innovation. We also rely on in-licensing opportunities to develop and maintain our proprietary position. We may further rely on statutory market exclusivity and patent term extensions that may be available for our product candidates once they achieve regulatory approval.

We maintain three categories of patent protection for, respectively, our DARPin platform, key single-binding domain DARPin proteins binding to specific targets and our DARPin product candidates. The first category of protection covers our DARPin platform:

•In an effort to stay a leader in the field of repeat protein technology, we have continued to work on improving the basic ankyrin repeat protein technology and have filed patent applications covering these improvements. Furthermore, we have enhanced our efforts to innovate in the ankyrin repeat protein field, including by developing new molecular designs, by generating ankyrin repeat proteins with novel modes of action, and by applying the ankyrin repeat protein technology to new disease areas and new target classes. We have translated this enhanced innovation into the generation of new intellectual property and have expanded our patent portfolio in the last couple of years. Taken together, we have made progress in protecting improvements of the DARPin base technology and innovative new aspects and applications of the DARPin technology in newly filed patent applications. However, we can provide no assurances that any such patent applications will be issued as patents.

•One example of a patent family that we own in this category is based on international patent application WO 2012/069655, relating to DARPin binding proteins comprising certain improved N-terminal capping modules. As of December 31, 2023, we owned three issued U.S. patents, nine issued foreign patents (i.e. patents granted in jurisdictions other than the U.S.) and one pending foreign patent application in this family. Any issued patents in this family are expected to expire in 2031. The disclosed improvement of the DARPin platform is included, for example, in our DARPin product candidates MP0310, MP0317 and MP0533.

•Another example of a patent family that we own in this category is based on international patent application WO 2023/110983, relating to DARPin domains which have binding specificity for two different targets, wherein binding of such a DARPin domain to its two targets is mutually exclusive. Such novel DARPin domains (also called “Switch DARPins”) may be used as molecular switches, such as, e.g., switches to control activation or deactivation of a therapeutic molecule. As of December 31, 2023, we owned one pending PCT international patent application in this family. Any patents that may issue in this family are expected to expire in 2042. The disclosed Switch DARPin platform is applied, for example, in our multispecific cKIT x CD16a x CD47 Switch DARPin program.

•Other patent applications falling in this category have been filed and are currently being prosecuted.

A second category of protection covers our key single-binding domain DARPin proteins binding to specific targets. These single domain DARPin binding proteins can be used in multiple DARPin product candidates. Our patent applications and corresponding patents directed to key single domain DARPin binding proteins currently include:

•One example of a patent family that we own in this category is based on international patent application WO 2010/060748, relating to single domain DARPin binding proteins with specificity for vascular endothelial growth factor A, or VEGF-A. As of December 31, 2023, we owned one issued U.S. patent and 31 issued foreign patents in this family. Any issued patents in this family are expected to expire in 2029, with the exception of one U.S. patent that received patent term adjustment and is expected to expire in 2031. VEGF-specific DARPin binding proteins are used, for example, in our DARPin product candidate abicipar.

•Another example of a patent family in this category is based on international patent application WO 2012/069654, relating to single domain DARPin binding proteins with specificity for human serum albumin, or HSA. As of December 31, 2023, we owned two issued U.S. patents, 22 issued foreign patents and three pending foreign patent applications in this family. Any issued patents in this family are expected to expire in 2031. HSA-specific DARPin binding proteins are used, for example, in our DARPin product candidates MP0310, MP0317 and MP0533.

•Another example of a patent family in this category is based on international patent application WO 2020/245173, relating to single domain DARPin binding proteins with specificity for fibroblast activation protein, or FAP. As of December 31, 2023, we owned one pending U.S. patent application and thirteen pending foreign patent applications in this family. Any patents that may be granted in this family are expected to expire in 2040. FAP-specific DARPin binding proteins are used in our DARPin product candidates MP0310 and MP0317.

•Another example of a patent family in this category is based on international patent application WO 2020/245175, relating to single domain DARPin binding proteins with specificity for 4-1BB. As of December 31, 2023, we owned one pending U.S. patent application and six pending foreign patent applications in this family. Any patents that may be granted in this family are expected to expire in 2040. 4-1BB-specific DARPin binding proteins are used in our DARPin product candidate MP0310.

•Another example of a patent family in this category is based on international patent application WO 2020/245171, relating to improved single domain DARPin binding proteins with specificity for HSA. As of December 31, 2023, we owned one pending U.S. patent application and 13 pending foreign patent applications in this family. Any patents that may be granted in this family are expected to expire in 2040. Disclosed HSA-specific DARPin binding proteins are used in our DARPin product candidates MP0310, MP0317 and MP0533.

•Another example of a patent family in this category is based on international patent application WO 2021/229076, relating to single domain DARPin binding proteins with specificity for CD40. As of December 31, 2023, we owned one pending U.S. patent application and five pending foreign patent applications in this family. Any patents that may be granted in this family are expected to expire in 2041. CD40-specific DARPin binding proteins are used in our DARPin product candidate MP0317.

•Another example of a patent family in this category is based on international patent application WO 2022/129428, relating to single domain DARPin binding proteins with specificity for CD3. As of December 31, 2023, we owned one pending U.S. patent application and thirteen pending foreign patent applications in this family. Any patents that may be granted in this family are expected to expire in 2041. CD3-specific DARPin binding proteins are used in our DARPin product candidate MP0533.

•Another example of a patent family in this category is based on international patent application WO 2022/190010, relating to single domain DARPin binding proteins with specificity for CD33. As of December 31, 2023, we owned one pending U.S. patent application and five pending foreign patent applications in this family. Any patents that may be granted in this family are expected to expire in 2042. CD33-specific DARPin binding proteins are used in our DARPin product candidate MP0533.

•Other patent applications falling in this category have been filed and are currently being prosecuted.

A third category of protection covers the composition of matter of certain of our DARPin product candidates (e.g., the specific combination and structure of DARPin binding proteins and additional elements that constitute the DARPin product candidate) as well as other product-specific inventions (e.g.

formulation, manufacturing process or dosing schedule). Our patent applications and corresponding patents related to our DARPin product candidates currently include:

•One example of a patent family that we own in this category is based on international patent application WO 2011/135067, relating to abicipar. As of December 31, 2023, we owned four issued U.S. patents, one pending U.S. patent application, 64 issued foreign patents and two pending foreign patent applications in this family. Any issued patents in this family are expected to expire in 2031, not considering any patent term extensions that may be available in various jurisdictions if abicipar obtains regulatory approval there.

•Another example of a patent family in this category is based on international patent application WO 2020/245746, relating to MP0310. As of December 31, 2023, we owned one pending U.S. patent application and 22 pending foreign patent applications in this family. Any patents that may be granted in this patent family are expected to expire in 2040, not considering any patent term extensions that may be available in various jurisdictions if MP0310 obtains regulatory approval there.

•Another example of a patent family in this category is based on international patent application WO 2021/229067, relating to MP0317. As of December 31, 2023, we owned two pending U.S. patent applications and 20 pending foreign patent applications in this family. Any patents that may be granted in this patent family are expected to expire in 2041, not considering any patent term extensions that may be available in various jurisdictions if MP0317 obtains regulatory approval there.

•Another example of a patent family in this category is based on international patent application WO 2022/190016, relating to MP0533. As of December 31, 2023, we owned one issued U.S. patent, one pending U.S. patent application and 17 pending foreign patent applications in this family. Any issued patents in this patent family are expected to expire in 2042, not considering any patent term extensions that may be available in various jurisdictions if MP0533 obtains regulatory approval there.

•Other patent applications falling in this category have been filed.

The actual protection afforded by a patent may vary on a product-by-product basis and from country to country and can depend upon many factors, including the type of patent, the scope of its coverage, the availability of regulatory-related extensions, the availability of legal remedies in a particular country and the validity and enforceability of the patent.

The term of an individual patent depends upon the legal term for patents in the countries in which they are granted. In most jurisdictions, including the United States and countries that are members of the European Patent Convention, the patent term is generally 20 years from the earliest effective filing date of a non-provisional patent application in the applicable country. In the United States, a patent’s term may, in certain cases, be lengthened by patent term adjustment, which compensates a patentee for administrative delays by the USPTO in granting a patent, or may be shortened if a patent is terminally disclaimed over a co-owned patent or patent application having an earlier expiration date or over a non-commonly owned patent or patent application having an earlier expiration date that was filed as a result of activities undertaken within the scope of a joint research agreement. In addition, patent term provisions are available in the United States, the member states of the European Union and certain other jurisdictions to extend the term of a patent that covers an approved drug to recapture a portion of the term effectively lost as a result of the regulatory review period. However, in the United States, the restoration period cannot be longer than five years, the total patent term including the restoration period must not exceed 14 years following FDA approval, only one patent applicable to each regulatory review period may be extended and only those claims covering the approved drug, a method for using it or a method of manufacturing it may be extended.

In the future, if and when our product candidates, including abicipar, MP0310, MP0317 and MP0533, receive approval by the FDA, EMA or any other relevant jurisdiction’s regulatory authorities, we expect, where possible, to apply for patent term extensions on issued patents covering those products, depending upon the length of the clinical trials for each product candidate and other factors. The expiration dates referred to above are without regard to potential patent term extensions that may be available to us and without regard to potential patent term adjustments or terminal disclaimers that may become applicable.

Notwithstanding our efforts, we cannot be sure that patents will be granted with respect to any patent applications we have licensed or filed or may license or file in the future, and we cannot be sure that any patents we have licensed or that have been granted to us, or any patents that may be licensed or granted to us in the future, will not be challenged, invalidated, rendered unenforceable or circumvented or that such patents will be commercially useful in protecting our technologies or product candidates.

We may rely, in some circumstances, on trade secrets and know-how to protect our technology. However, trade secrets and know-how can be difficult to protect. We seek to protect our proprietary technology and processes, in part, through confidentiality agreements and invention assignment agreements with our employees, consultants, scientific advisors, contractors and commercial partners. We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems.

We own registrations for certain trademarks, including “Molecular Partners”, in Switzerland, the European Union, the United States and Japan. Further, we intend to build up a trademark portfolio for our technologies and product candidates as potential branding and commercialization approaches.

For more information regarding the risks related to our intellectual property, please see “Risk Factors—Risks Related to Intellectual Property.”

On January 5, 2024, we announced we entered into a co-development agreement with Orano Med to co-develop 212Pb-based Radio-DARPin Therapies (RDT). Under the terms of the co-development agreement, our previously disclosed RDT target DLL3 (delta-like ligand 3) will be included in the collaboration with Orano Med. Both companies are developing additional radioligand therapy candidates in partnership with other companies, with us having announced our first collaboration with Novartis in December 2021.

Expression of DLL3 is low in healthy tissue but significantly increased in certain tumor types, such as small-cell lung cancer, providing an opportunity for selective tumor-targeting. DLL3 will be exclusively developed by us and Orano Med as a RDT target.

On December 14, 2021, we entered into a license and collaboration agreement with Novartis to develop DARPin-conjugated radioligand therapeutic candidates for oncology, or the Novartis Radioligand Agreement. Under the agreement, both parties will collaborate on the discovery and optimization of the therapeutic candidates.

We are primarily responsible for the generation of DARPins for tumor-specific delivery of radioligands. We are eligible to invoice Novartis for our employee-related expenses associated with the research activities. Novartis is responsible for all clinical development and commercialization activities. In January 2022, Novartis paid us an upfront fee of $20 million (CHF 18.6 million). Additionally, we are eligible to receive milestone payments of up to $560 million, relating to development, regulatory and commercialization activities plus tiered royalties based on commercial sale levels from mid-single digit to low double-digit percentages of royalties on net sales of products commercialized by Novartis.

In October 2020, we entered into an agreement with Novartis, granting Novartis the exclusive option to in-license global rights in relation to MP0420 (ensovibep), or the Option and Equity Rights Agreement. Under the terms of the agreement, we in 2020 received an upfront, non-refundable fee of CHF 20 million for the technology transfer and manufacturing of MP0420.

On January 2023 Novartis informed us that it has submitted a request to withdraw, with an effective date of January 25, 2023 the Emergency Use Authorization (EUA) application from the U.S. Food and Drug Administration (FDA) for ensovibep.

On January 5 2024, the License Agreement for ensovibep has been terminated and Novartis has returned the rights to the ensovibep program to us. Clinical work on the ensovibep program ended in 2022 and the program remains terminated.

On August 11, 2020, we announced the reservation by the Federal Office of Public Health, or FOPH, of a defined number of initial doses of our anti-COVID-19 candidate, MP0420. Under the terms of the agreement, we received a reservation fee of CHF 7.0 million. With the exercise of the option by Novartis in January 2022 and the subsequent assignment of the agreement to Novartis, we recognized the CHF 7.0 million as revenue in 2022.

In December 2018, we entered into a license and collaboration agreement with Amgen for the clinical development and commercialization of MP0310 / AMG 506, or the Amgen Collaboration Agreement. Under the agreement we received a non-refundable upfront payment of USD 50 million.

On April 26, 2022 we announced that Amgen, had informed us of its decision to return the global rights of MP0310 following a strategic pipeline review. With no remaining performance obligations under the Amgen Collaboration Agreement, we recognized the remaining balance of the Amgen contract liability of CHF 9.7 million as revenue in 2022.

As a biopharmaceutical company that operates in the United States, we are subject to extensive regulation. Government authorities in the United States (at the federal, state and local level) and in other countries extensively regulate, among other things, the research, development, testing, manufacturing, quality control, approval, labeling, packaging, storage, record-keeping, promotion, advertising, distribution, post-approval monitoring and reporting, marketing and export and import of biopharmaceutical products such as those we are developing.

Our product candidates must be approved by the FDA before they may be legally marketed in the United States and by the appropriate foreign regulatory agency before they may be legally marketed in foreign countries. Generally, our activities in other countries will be subject to regulation that is similar in nature and scope as that imposed in the United States, although there can be important differences. Additionally, some significant aspects of regulation in Europe are addressed in a centralized way, but country-specific regulation remains essential in many respects. The process for obtaining regulatory marketing approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources.

In the United States, the FDA regulates pharmaceutical and biological products under the Federal Food, Drug and Cosmetic Act, or the FDCA, the Public Health Service Act, or the PHSA, and their implementing regulations. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product development process, approval process or after approval, may subject an applicant to administrative or judicial sanctions. FDA sanctions could include, among other actions, refusal to approve pending applications, withdrawal of an approval, a clinical hold, warning letters, product recalls or withdrawals from the market, product seizures, total or partial suspension of production or distribution injunctions, fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on us. The process required by the FDA before a biological product may be marketed in the United States generally involves the following:

•completion of nonclinical laboratory tests and animal studies according to good laboratory practices, or GLPs, and applicable requirements for the humane use of laboratory animals or other applicable regulations;

•submission to the FDA of an IND, which must become effective before human clinical trials may begin;

•approval by an independent Institutional Review Board, or IRB, or ethics committee at each clinical site before the trial is commenced;

•performance of adequate and well-controlled human clinical trials according to the FDA’s regulations commonly referred to as good clinical practices, or GCPs, and any additional requirements for the protection of human research patients and their health information, to establish the safety and efficacy of the proposed biological product for its intended use;

•submission to the FDA of a Biologics Licensing Application, or BLA, for marketing approval that includes substantial evidence of safety, purity, and potency from results of nonclinical testing and clinical trials;

•satisfactory completion of an FDA Advisory Committee review, if applicable;

•satisfactory completion of an FDA inspection of the manufacturing facility or facilities where the biological product is produced to assess compliance with cGMP, to assure that the facilities, methods and controls are adequate to preserve the biological product’s identity, strength, quality and purity;

•potential FDA audit of the nonclinical study and clinical trial sites that generated the data in support of the BLA; and

•FDA review and approval or licensure of the BLA.

Before testing any biological product candidate, including our product candidates, in humans, the product candidate enters the preclinical testing stage. Preclinical tests, also referred to as nonclinical studies, include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal studies to assess the potential safety and activity of the product candidate. The conduct of the preclinical tests must comply with federal regulations and requirements including GLPs. The clinical trial sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND. Some preclinical testing may continue even after the IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA raises concerns or questions regarding the proposed clinical trials and places the trial on a clinical hold within that 30-day time period. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. The FDA may also impose clinical holds on a biological product candidate at any time before or during clinical trials due to safety concerns or non-compliance. If the FDA imposes a clinical hold, trials may not recommence without FDA authorization and then only under terms authorized by the FDA. Accordingly, we cannot be sure that submission of an IND will result in the FDA allowing clinical trials to begin, or that, once begun, issues will not arise that suspend or terminate such trials.

Clinical trials involve the administration of the biological product candidate to patients under the supervision of qualified investigators, generally physicians not employed by or under the trial sponsor’s control. Clinical trials are conducted under protocols detailing, among other things, the objectives of the clinical trial, dosing procedures, subject selection and exclusion criteria, and the parameters to be used to monitor subject safety, including stopping rules that assure a clinical trial will be stopped if certain adverse events should occur. Each protocol and any amendments to the protocol must be submitted to the FDA as part of the IND. Clinical trials must be conducted and monitored in accordance with the FDA’s regulations comprising the GCP requirements, including the requirement that all research patients provide informed consent. Further, each clinical trial must be reviewed and approved by an independent IRB at or servicing each institution at which the clinical trial will be conducted. An IRB is charged with protecting the welfare and rights of trial participants and considers such items as whether the risks to individuals participating in the clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the form and content of the informed consent that must be signed by each clinical trial subject or his or her legal representative and must monitor the clinical trial until completed. Some studies also include oversight by an independent group of qualified experts organized by the clinical study sponsor, known as a data safety monitoring board, which provides authorization for whether or not a study may move forward at designated check points based on access to certain data from the study and may halt the clinical trial if it determines that there is an unacceptable safety risk for subjects or other grounds, such as no demonstration of efficacy. There are also requirements governing the reporting of ongoing clinical studies and clinical study results to public registries.

Human clinical trials are typically conducted in three sequential phases that may overlap or be combined:

•Phase 1. The biological product is initially introduced into healthy human subjects and tested for safety. In the case of some products for severe or life-threatening diseases, especially when the product may be too inherently toxic to ethically administer to healthy volunteers, the initial human testing is often conducted in patients.

•Phase 2. The biological product is evaluated in a limited patient population to identify possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance, optimal dosage and dosing schedule.

•Phase 3. Clinical trials are undertaken to further evaluate dosage, clinical efficacy, potency, and safety in an expanded patient population at geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall risk to benefit ratio of the product and provide an adequate basis for product labeling.

Post-approval clinical trials, sometimes referred to as Phase 4 clinical trials, may be conducted after initial marketing approval. These clinical trials are used to gain additional experience from the treatment of patients in the intended therapeutic indication, particularly for long-term safety follow-up. During all phases of clinical development, regulatory agencies require extensive monitoring and auditing of all clinical activities, clinical data, and clinical trial investigators. Annual progress reports detailing the results of the clinical trials must be submitted to the FDA. Written IND safety reports must be promptly submitted to the FDA and the investigators for serious and unexpected adverse events, any findings from other studies, tests in laboratory animals or in vitro testing that suggest a significant risk for human patients, or any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. Phase 1, Phase 2 and Phase 3 clinical trials may not be completed successfully within any specified period, if at all. The FDA or the sponsor or its data safety monitoring board may suspend or terminate a clinical trial at any time on various grounds, including a finding that the research patients are being exposed to an unacceptable health risk, including risks inferred from other unrelated immunotherapy trials. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the biological product has been associated with unexpected serious harm to patients.

Concurrently with clinical trials, companies usually complete additional studies and must also develop additional information about the physical characteristics of the biological product as well as finalize a process for manufacturing the product in commercial quantities in accordance with cGMP requirements. To help reduce the risk of the introduction of adventitious agents with use of biological products, the PHSA emphasizes the importance of manufacturing control for products whose attributes cannot be precisely defined. The manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other things, the sponsor must develop methods for testing the identity, strength, quality, potency and purity of the final biological product. Additionally, appropriate packaging must be selected and tested and stability studies must be conducted to demonstrate that the biological product candidate does not undergo unacceptable deterioration over its shelf life.

After the completion of clinical trials of a biological product, FDA approval of a BLA must be obtained before commercial marketing of the biological product. The BLA submission must include results of product development, laboratory and animal studies, human trials, information on the manufacture and composition of the product, proposed labeling and other relevant information. The testing and approval processes require substantial time and effort and there can be no assurance that the FDA will accept the BLA for filing and, even if filed, that any approval will be granted on a timely basis, if at all.

Under the Prescription Drug User Fee Act, or PDUFA, as amended, each BLA must be accompanied by a significant user fee. The FDA adjusts the PDUFA user fees on an annual basis. PDUFA also imposes an annual program fee for biological products. Fee waivers or reductions are available in certain circumstances, including a waiver of the application fee for the first application filed by a small business.

Additionally, no user fees are assessed on BLAs for products designated as orphan drugs, unless the product also includes a non-orphan indication.

Within 60 days following submission of the application, the FDA reviews a BLA submitted to determine if it is substantially complete before the agency accepts it for filing. The FDA may refuse to file any BLA that it deems incomplete or not properly reviewable at the time of submission and may request additional information. In this event, the BLA must be resubmitted with the additional information. The resubmitted application also is subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substantive review of the BLA. The FDA reviews the BLA to determine, among other things, whether the proposed product is safe, potent, and/or effective for its intended use, and has an acceptable purity profile, and whether the product is being manufactured in accordance with cGMP to assure and preserve the product’s identity, safety, strength, quality, potency and purity. The FDA may refer applications for novel biological products or biological products that present difficult questions of safety or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for review, evaluation and a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions. During the biological product approval process, the FDA also will determine whether a Risk Evaluation and Mitigation Strategy, or REMS, is necessary to assure the safe use of the biological product. A REMS is a safety strategy to manage a known or potential serious risk associated with a medicine and to enable patients to have continued access to such medicines by managing their safe use, and could include medication guides, physician communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. If the FDA concludes a REMS is needed, the sponsor of the BLA must submit a proposed REMS. The FDA will not approve a BLA without a REMS, if required.

Before approving a BLA, the FDA will inspect the facilities at which the product is manufactured. The FDA will not approve the product unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. Additionally, before approving a BLA, the FDA will typically inspect one or more clinical sites to assure that the clinical trials were conducted in compliance with IND trial requirements and GCP requirements. To assure cGMP and GCP compliance, an applicant must incur significant expenditure of time, money and effort in the areas of training, record keeping, production, and quality control.

Notwithstanding the submission of relevant data and information, the FDA may ultimately decide that the BLA does not satisfy its regulatory criteria for approval and deny approval. Data obtained from clinical trials are not always conclusive and the FDA may interpret data differently than we interpret the same data. If the agency decides not to approve the BLA in its present form, the FDA will issue a complete response letter that describes all of the specific deficiencies in the BLA identified by the FDA. The deficiencies identified may be minor, for example, requiring labeling changes, or major, for example, requiring additional clinical trials. Additionally, the complete response letter may include recommended actions that the applicant might take to place the application in a condition for approval. If a complete response letter is issued, the applicant may either resubmit the BLA, addressing all of the deficiencies identified in the letter, or withdraw the application.

If a product receives regulatory approval, the approval may be limited to specific diseases and dosages or the indications for use may otherwise be limited, which could restrict the commercial value of the product. Further, the FDA may require that certain contraindications, warnings or precautions be included in the product labeling. The FDA may impose restrictions and conditions on product distribution, prescribing, or dispensing in the form of a risk management plan, or otherwise limit the scope of any approval.

In addition, the FDA may require post marketing clinical trials, sometimes referred to as Phase 4 clinical trials, designed to further assess a biological product’s safety and effectiveness, and testing and surveillance programs to monitor the safety of approved products that have been commercialized.

In addition, under the Pediatric Research Equity Act, or PREA, a BLA or supplement to a BLA must contain data to assess the safety and effectiveness of the product for the claimed indications in all relevant pediatric subpopulations and to support dosing and administration for each pediatric subpopulation for which the product is safe and effective. The FDA may grant deferrals for submission of data or full or partial waivers. Unless otherwise required by regulation, PREA does not apply to any product for an indication for which orphan designation has been granted. However, if only one indication for a product has orphan designation, a pediatric assessment may still be required for any applications to market that same product for the non-orphan indication or indications.

Any products for which we receive FDA approvals are subject to continuing regulation by the FDA, including, among other things, record-keeping requirements, reporting of adverse experiences with the product, providing the FDA with updated safety and efficacy information, product sampling and distribution requirements, and complying with FDA promotion and advertising requirements, which include, among others, standards for direct-to-consumer advertising, restrictions on promoting products for uses or in patient populations that are not described in the product’s approved uses (known as “off-label use”), limitations on industry-sponsored scientific and educational activities, and requirements for promotional activities involving the internet. Although a physician may prescribe a legally available product for an off-label use, if the physician deems such product to be appropriate in his/her professional medical judgment, a manufacturer may not market or promote off-label uses. Violations, including actual or alleged promotion of products for unapproved or off-label uses, are subject to enforcement letters, inquiries and investigations, and civil and criminal sanctions by the FDA or comparable foreign bodies. Any actual or alleged failure to comply with labeling and promotion requirements may result in fines, warning letters, mandates to corrective information to healthcare practitioners, injunctions, or civil or criminal penalties.

In addition, quality control and manufacturing procedures must continue to conform to applicable manufacturing requirements after approval to ensure the long-term stability of the product. cGMP regulations require among other things, quality control and quality assurance as well as the corresponding maintenance of records and documentation and the obligation to investigate and correct any deviations from cGMP. Manufacturers and other entities involved in the manufacture and distribution of approved products are required to register their establishments with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP and other laws. Accordingly, manufacturers must continue to expend time, money, and effort in the area of production and quality control to maintain cGMP compliance. In addition, changes to the manufacturing process are strictly regulated, and depending on the significance of the change, may require prior FDA approval before being implemented. Other types of changes to the approved product, such as adding new indications and claims, are also subject to further FDA review and approval. Discovery of problems with a product after approval may result in restrictions on a product, manufacturer, or holder of an approved BLA, including, among other things, recall or withdrawal of the product from the market. Other potential consequences include, among other things:

•restrictions on the marketing or manufacturing of the product;

•fines, warning letters, untitled letters, or clinical holds;

•refusal of the FDA to approve pending applications or supplements to approved applications, or suspension or revocation of product approvals;

•adverse publicity, FDA mandated corrective advertising or communications with doctors;

•product seizure or detention, or refusal to permit the import or export of products; or

•injunctions or the imposition of civil or criminal penalties.

The FDA also may require post-marketing testing, known as Phase 4 testing, and surveillance to monitor the effects of an approved product. Newly discovered or developed safety or effectiveness data may require changes to a product’s approved labeling, including the addition of new warnings and contraindications, and also may require the implementation of other risk management measures. Also, new government requirements, including those resulting from new legislation, may be established, or the FDA’s policies may change, which could delay or prevent regulatory approval of our products under development.

The Biologics Price Competition and Innovation Act, or BPCIA, amended the PHSA to authorize the FDA to approve similar versions of innovative biologics, commonly known as biosimilars. A competitor seeking approval of a biosimilar must file an application to establish its molecule as highly similar to an approved innovator biologic, among other requirements. The BPCIA, however, bars the FDA from approving biosimilar applications referencing that biologic for 12 years after an innovator biological product receives initial marketing approval. During this 12-year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a full BLA for the competing product containing that applicant’s own preclinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity and potency of its product. Pediatric exclusivity is another type of regulatory market exclusivity in the United States. Pediatric exclusivity, if granted, adds six months to existing exclusivity periods and patent terms. This six-month exclusivity, which runs from the end of other exclusivity protection or patent term, may be granted based on the voluntary completion of a pediatric trial in accordance with an FDA-issued “Written Request” for such a trial.

A biopharmaceutical company’s operations may be directly, or indirectly through relationships with healthcare providers, healthcare institutions, patients, customers and third-party payors, subject to various federal and state healthcare laws and regulations. These laws impact, among other things, sales, marketing and education programs and may constrain business and financial arrangements and relationships with third-party payors, healthcare professionals and healthcare institutions who participate in a biopharmaceutical company’s clinical research programs, healthcare professionals and others who recommend, purchase, or provide a biopharmaceutical company’s approved drug products, and other parties through which it markets, sells and distributes its approved drug products. In addition, a biopharmaceutical company may be subject to patient data privacy and security regulation by both the federal government and the states in which it conducts its business. The laws that may affect a biopharmaceutical company’s ability to operate include:

•the federal Anti-Kickback Statute, which prohibits, among other things, individuals or entities from knowingly and willfully soliciting, offering, receiving or paying any remuneration (including any kickback, bribe, or rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward either the referral of an individual for, or the purchase, lease, order or recommendation of, any good, facility, item or service, for which payment may be made, in whole or in part, under federal and state healthcare programs such as Medicare and Medicaid;

•the federal civil and criminal false claims laws, including, without limitation, the civil False Claims Act (which can be enforced through "qui tam," or whistleblower actions, by private citizens on behalf of the federal government), and the federal civil monetary penalties law, which prohibit, among other things, individuals or entities from knowingly presenting, or causing to be presented, to the federal government, claims for payment or approval that are false or fraudulent or for knowingly making a false statement to avoid, decrease or conceal an obligation to pay money to the federal government;

•the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which prohibits, among other things, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, or knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false statement, in connection with the delivery of, or payment for, healthcare benefits, items or services;

•HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009, or HITECH, and its implementing regulations, and as amended again by the Final HIPAA Omnibus Rule, published in January 2013, which imposes certain obligations, including mandatory contractual terms, with respect to safeguarding the privacy, security and transmission of individually identifiable health information without appropriate authorization on certain health plans, healthcare clearinghouses and healthcare providers, known as covered entities, as well as their business associates that perform certain services involving the use, disclosure or transmission of individually identifiable health information for or on behalf of a covered entity, and their covered subcontractors;

•the Federal Food, Drug, and Cosmetic Act which prohibits, among other things, the adulteration or misbranding of drugs, biologics and medical devices;

•the federal physician payment transparency legislation commonly referred to as the Physician Payments Sunshine Act, and its implementing regulations, which requires certain manufacturers of drugs, devices, biologics and medical supplies (with certain exceptions) that are reimbursable under Medicare, Medicaid, or the Children's Health Insurance Program to report annually to the Centers for Medicare & Medicaid, or CMS, information related to certain payments and other transfers of value to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors), certain other health care professionals (such as physicians assistants and nurse practitioners), and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members; and

•analogous state laws and regulations, including: state anti-kickback and false claims laws, which may apply to our business practices, including but not limited to, research, distribution, sales and marketing arrangements and claims involving healthcare items or services reimbursed by any third-party payor, including private insurers; state laws that require pharmaceutical companies to comply with the pharmaceutical industry's voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government, or otherwise restrict payments that may be made to healthcare providers and other potential referral sources; state laws and regulations that require drug manufacturers to file reports relating to pricing and marketing information, which requires tracking gifts and other remuneration and items of value provided to healthcare professionals and entities; state and local laws that require the registration of pharmaceutical sales representatives; and state laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

It is possible that governmental authorities will conclude that a biopharmaceutical company’s business practices do not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If a biopharmaceutical company’s operations are found to be in violation of any of these laws or any other governmental regulations that may apply to it, it may be subject to significant civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in government funded healthcare programs, such as Medicare and Medicaid, additional reporting requirements and oversight if subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, reputational harm and the curtailment or restructuring of operations.

The risk of being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations. For example, the definition of "remuneration" under the federal Anti-Kickback Statute has been interpreted to include anything of value. Further, courts have found that if "one purpose" of remuneration is to induce referrals, the federal Anti-Kickback Statute is violated.

Additionally, recent healthcare reform legislation has strengthened federal and state healthcare fraud and abuse laws. For example, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively the ACA, amends the intent requirement of the federal Anti-Kickback Statute and criminal healthcare fraud statutes to clarify that liability under these statutes does not require a person or entity to have actual knowledge of the statutes or a specific intent to violate them in order to have committed a violation. Moreover, the ACA provides that the government may assert that a claim that includes items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act. Because of the breadth of these laws and the narrowness of the statutory exceptions and regulatory safe harbors available, it is possible that some of a biopharmaceutical company’s business activities could be subject to challenge under one or more of such laws.

In the United States, there have been a number of legislative and regulatory changes at the federal and state levels which seek to reduce healthcare costs and improve the quality of healthcare. For example, in March 2010, the ACA became law. The ACA is a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, enhance remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes and fees on the health industry and impose additional health policy reforms.

The ACA, among other things, increased the minimum level of Medicaid rebates payable by manufacturers of brand name drugs; required collection of rebates for drugs paid by Medicaid managed care organizations; required manufacturers to participate in a coverage gap discount program, under which they must agree to offer point-of-sale discounts (increased to 70 percent, effective as of January 1, 2019) off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D; imposed a non-deductible annual fee on pharmaceutical manufacturers or importers who sell certain “branded prescription drugs” to specified federal government programs, implemented a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted, or injected expanded the types of entities eligible for the 340B drug discount program; expanded eligibility criteria for Medicaid programs; created a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research; and established a Center for Medicare Innovation at CMS to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending.

There have been executive, judicial and Congressional challenges to certain aspects of the ACA. While Congress has not passed comprehensive repeal legislation, several bills affecting the implementation of certain taxes under the ACA have been signed into law. The Tax Cuts and Jobs Act of 2017, or the Tax Act, included a provision, which repealed, effective January 1, 2019, the tax-based shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year that is commonly referred to as the “individual mandate.” In addition, the 2020 federal spending package permanently eliminated, effective January 1, 2020, the ACA-mandated “Cadillac” tax on high-cost employer-sponsored health coverage and medical device tax and, effective January 1, 2021, also eliminated the health insurer tax. On June 17, 2021, the U.S. Supreme Court dismissed a challenge on procedural grounds that argue the Affordable Care Act is unconstitutional in its entirety because the “individual mandate” was repealed by Congress. Further, on August 16, 2022, President Biden signed the Inflation Reduction Act of 2022, or IRA, into law, which among other things, extends enhanced subsidies for individuals purchasing health insurance coverage in ACA marketplaces through plan year 2025. The IRA also eliminates the “donut hole” under the Medicare Part D program beginning in 2025 by significantly lowering the beneficiary maximum out-of-pocket cost and creating a new manufacturer discount program. It is possible that the ACA will be subject to judicial or Congressional challenges in the future. It is unclear how any such challenges and the healthcare reform measures of the Biden administration will impact the ACA.

In addition, other legislative changes have been proposed and adopted since the ACA was enacted. For example, on August 2, 2011, the Budget Control Act of 2011, among other things, includes aggregate reductions of Medicare payments to providers of 2% per fiscal year. These reductions went into effect on April 1, 2013 and, due to subsequent legislative amendments to the statute will remain in effect through 2032 unless additional Congressional action is taken. On January 2, 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among other things, further reduced Medicare payments to several types of providers, including hospitals, imaging centers and cancer treatment centers, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. Additionally, on March 11, 2021, President Biden signed the American Rescue Plan Act of 2021 into law, which eliminates the statutory Medicaid drug rebate cap, currently set at 100% of a drug’s average manufacturer price, for single source and innovator multiple source drugs, beginning on January 1, 2024.

Further, there has also been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products. Specifically, there have been several recent Congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs and reform government program reimbursement methodologies for drugs. At the federal level in July 2021, the Biden administration released an executive order, “Promoting Competition in the American Economy,” with multiple provisions aimed at prescription drugs. In response to Biden’s executive order, on September 9, 2021, the U.S. Department of Health and Human Services, or HHS, released a Comprehensive Plan for Addressing High Drug Prices that outlines principles for drug pricing reform and sets out a variety of potential legislative policies that Congress could pursue as well as potential administrative actions HHS can take to advance these principles. In addition, the IRA, among other things (i) directs HHS to negotiate the price of certain high-expenditure, single-source drugs and biologics covered under Medicare and (ii) imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation. These provisions take effect progressively starting in fiscal year 2023. On August 29, 2023, HHS announced the list of the first ten drugs that will be subject to price negotiations, although the Medicare drug price negotiation program is currently subject to legal challenges. In response to the Biden administration’s October 2022 executive order, on February 14, 2023, HHS released a report outlining three new models for testing by the CMS Innovation Center which will be evaluated on their ability to lower the cost of drugs, promote accessibility, and improve quality of care.

It is unclear whether the models will be utilized in any health reform measures in the future. Further, on December 7, 2023, the Biden administration announced an initiative to control the price of prescription drugs through the use of march-in rights under the Bayh-Dole Act. On December 8, 2023, the National Institute of Standards and Technology published for comment a Draft Interagency Guidance Framework for Considering the Exercise of March-In Rights which for the first time includes the price of a product as one factor an agency can use when deciding to exercise march-in rights. While march-in rights have not previously been exercised, it is uncertain if that will continue under the new framework.

At the state level, legislatures are increasingly passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs.

Clinical trials of medicinal products in the European Union must be conducted in accordance with European Union and national regulations and the international council for harmonization, or ICH, guidelines on GCP. Additional GCP guidelines from the EC, focusing in particular on traceability, apply to clinical trials of advanced therapy medicinal products. The sponsor must take out a clinical trial insurance policy, and in most European Union countries, the sponsor is liable to provide “no fault” compensation to any study subject injured in the clinical trial.

Prior to commencing a clinical trial, the sponsor must obtain a clinical trial authorization from the competent authority, and a positive opinion from an independent ethics committee. The application for a clinical trial authorization must include, among other things, a copy of the trial protocol and an investigational medicinal product dossier containing information about the manufacture and quality of the medicinal product under investigation. Previously, in the European Union, pursuant to the EU Clinical Trials Directive 2001/20/EC, a CTA had to be submitted to each country’s national regulatory authority in which the clinical trial was to take place, together with an independent ethics committee, much like the FDA and IRB, respectively. Although the Directive had sought to harmonize the EU clinical trials regulatory framework, EU Member States transposed and applied the provisions of the Directive differently, leading to significant variation in the regulatory regimes of the member states. In 2014, a new Clinical Trials Regulation 536/2014, replacing the current Directive, was adopted. The new Regulation is directly applicable in all EU Member States (without national implementation) and entered into application on 31 January 2022. The new Regulation seeks to simplify and streamline the approval of clinical trials in the European Union. Pursuant to the Regulation, the sponsor shall submit a single CTA via the EMA's Clinical Trials Information System, or CTIS, which will cover all regulatory and ethics assessments from the member states concerned.

Any submissions made from January 31, 2023 onwards must be made through CTIS and all trials authorized pursuant to the Directive that are still ongoing on January 31, 2025 must be made through CTIS. Once the CTA is approved in accordance with a member state's requirements, clinical trial development may proceed. Approval and monitoring of clinical trials in the European Union is, as it was under the Directive, the responsibility of individual member states, but compared to the position prior to the applicability of the Clinical Trials Regulation there is likely to be more collaboration, information-sharing, and decision-making between member states.

The new Regulation also aims to streamline and simplify the rules on safety reporting and introduces enhanced transparency requirements, such as mandatory submission of a summary of the clinical trial results to a new E.U. Database. The requirements and process governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to country. In all cases, the clinical trials are conducted in accordance with GCP and the applicable regulatory requirements and the ethical principles that have their origin in the Declaration of Helsinki. Medicines used in clinical trials must be manufactured in accordance with cGMP.

During the development of a medicinal product the EMA and national medicines regulators within the European Union provide the opportunity for dialogue and guidance on the development program. At the EMA level, this is usually done in the form of scientific advice, which is given by the Scientific Advice Working Party of the Committee for Medicinal Products for Human Use. A fee is incurred with each scientific advice procedure. Advice from the EMA is typically provided based on questions concerning, for example, quality (chemistry, manufacturing and controls testing), nonclinical testing and clinical studies, and pharmacovigilance plans and risk-management programs.

In order to market a new medicinal product in the European Union, a company must submit a marketing authorization application, or MAA, to either the EMA using the centralized procedure, or competent authorities in European Union Member States using the other procedures (decentralized procedure, national procedure, or mutual recognition procedure). A marketing authorization, or MA may only be granted to an applicant established in the European Union, or Norway, Iceland, and Liechtenstein, who are members of the European Economic Area, or European Economic Area. Medicinal products can only be commercialized after obtaining an MA pursuant to one of the three processes outlined below:

•the Centralized MA, which is issued by the European Commission through the Centralized Procedure, based on the scientific opinion of the Committee for Medicinal Products for Human Use of the EMA, and which is valid throughout the entire territory of the European Union/European Economic Area. The Centralized Procedure is mandatory for certain types of products, such as (i) biotechnology medicinal products such as genetic engineering, (ii) orphan medicinal products, (iii) medicinal products containing a new active substance indicated for the treatment of AIDS, cancer, neurodegenerative disorders, diabetes, autoimmune and viral diseases and (iv) advanced-therapy medicines, such as gene therapy, somatic cell therapy or tissue-engineered medicines. The Centralized Procedure is optional for products containing a new active substance not yet authorized in the European Union/European Economic Area, or for products that constitute a significant therapeutic, scientific or technical innovation or which are in the interest of public health in the European Union.

•Decentralized Procedure MAs are available for products not falling within the mandatory scope of the Centralized Procedure. An identical dossier is submitted to the competent authorities of each of the Member States in which the MA is sought, one of which is selected by the applicant as the Reference Member State, or RMS, to lead the evaluation of the regulatory submission. The competent authority of the RMS prepares a draft assessment report, a draft summary of the product characteristics, or SmPC, and a draft of the labeling and package leaflet as distilled from the preliminary evaluation, which are sent to the other Member States (referred to as the Concerned Member States) for their approval. If the Concerned Member States raise no objections, based on a potential serious risk to public health, to the assessment, SmPC, labeling, or packaging proposed by the RMS, the RMS records the agreement, closes the procedure and informs the applicant accordingly. Each Member State concerned by the procedure is required to adopt a national decision to grant a national MA in conformity with the approved assessment report, SmPC and the labeling and package leaflet as approved. Where a product has already been authorized for marketing in a Member State of the European Economic Area, the granted national MA can be used for mutual recognition in other Member States through the Mutual Recognition Procedure, or MRP, resulting in progressive national approval of the product in the European Union/European Economic Area.

•National MAs, which are issued by a single competent authority of the Member States of the European Economic Area and only covers their respective territory, are also available for products not falling within the mandatory scope of the Centralized Procedure. Once a product has been authorized for marketing in a Member State of the European Economic Area through the National Procedure, this National MA can also be recognized in other Member States through the Mutual Recognition Procedure.

Under the procedures described above, before granting the MA, the EMA or the competent authority(ies) of the member state(s) of the European Economic Area prepare an assessment of the risk-benefit balance of the product against the scientific criteria concerning its quality, safety and efficacy.

Under Regulation (EC) No 726/2004/EC and Directive 2001/83/EC (each as amended), the European Union has adopted a harmonized approach to data and market protection or exclusivity (known as the 8 + 2 + 1 formula). The data exclusivity period begins to run on the date when the first MA is granted in the European Union. It confers on the MA holder of the reference medicinal product eight years of data exclusivity and ten years of market exclusivity. A reference medicinal product is defined to mean a medicinal product authorized based on a full dossier consisting of pharmaceutical and preclinical testing results and clinical trial data, such as a medicinal product containing a new active substance. The ten-year market protection can be extended cumulatively to a maximum period of eleven years if during the first eight years of those ten years of protection period, the MA holder obtains an authorization for one or more new therapeutic indications that are deemed to bring a significant clinical benefit compared to existing therapies.

The exclusivity period means that an applicant for a generic medicinal product is not permitted to rely on preclinical pharmacological, toxicological, and clinical data contained in the file of the reference medicinal product of the originator until the first eight years of data exclusivity have expired. Thereafter, a generic product application may be submitted and generic companies may rely on the preclinical and clinical data relating to the reference medicinal product to support approval of the generic product. However, a generic product cannot market until ten years have elapsed from the initial authorization of the reference medicinal product or eleven years if the protection period is extended, based on the formula of 8+2+1.

In addition to the above, where an application is made for a new indication for a well-established substance, a non-cumulative period of one year of data exclusivity may be granted, provided that significant preclinical or clinical studies were carried out in relation to the new indication. Finally, where a change of classification of a medicinal product has been authorized on the basis of significant preclinical tests or clinical trials, the competent authority shall not refer to the results of those tests or trials when examining an application by another applicant for or holder of marketing authorization for a change of classification of the same substance for one year after the initial change was authorized.

The 8 + 2 + 1 exclusivity scheme applies to products that have been authorized in the European Union by the European Commission through the Centralized Procedure or the competent authorities of the Member States of the European Economic Area nationally, including through the Decentralized and Mutual Recognition procedures.

For a medicinal product which has received orphan designation under Regulation 141/2000, it will, benefit from a period of ten years of orphan market exclusivity which essentially constitutes a period of market monopoly. During this period of orphan market exclusivity, no European Union regulatory authority is permitted to accept or approve an application for marketing authorization for a similar medicinal product or an extension application for the same therapeutic indication. This period can be extended cumulatively to a total of twelve years if the marketing authorization holder or applicant complies with the requirements for an agreed pediatric investigation plan pursuant to Regulation 1901/2006.

The holder of a Centralized MA or National MA is subject to various obligations under the applicable European Union laws, such as pharmacovigilance obligations, requiring it to, among other things, report and maintain detailed records of adverse reactions, and to submit periodic safety update reports, or PSURs, to the competent authorities. All new marketing authorization applications must include a risk management plan, or RMP, describing the risk management system that the company will put in place and documenting measures to prevent or minimize the risks associated with the product. The regulatory authorities may also impose specific obligations as a condition of the marketing authorization. Such risk-minimization measures or post-authorization obligations may include additional safety monitoring, more frequent submission of PSURs, or the conduct of additional clinical trials or post-authorization safety studies. RMPs and PSURs are routinely available to third parties requesting access, subject to limited redactions. All advertising and promotional activities for the product must be consistent with the approved summary of product characteristics, and therefore all off-label promotion is prohibited. Direct-to-consumer advertising of prescription medicines is also prohibited in the European Union. The holder must also ensure that the manufacturing and batch release of its product is in compliance with the applicable requirements. The MA holder is further obligated to ensure that the advertising and promotion of its products complies with applicable European Union laws and industry code of practice as implemented in the domestic laws of the Member States of the European Union/European Economic Area. The advertising and promotional rules are enforced nationally by the European Union/European Economic Area Member States.

In the European Union, companies developing a new medicinal product must agree to a Pediatric Investigation Plan, or PIP, with the EMA and must conduct pediatric clinical trials in accordance with that PIP, unless a deferral or waiver applies, (e.g., because the relevant disease or condition occurs only in adults). The marketing authorization application for the product must include the results of pediatric clinical trials conducted in accordance with the PIP, unless a waiver applies, or a deferral has been granted, in which case the pediatric clinical trials must be completed at a later date. Products that are granted a marketing authorization on the basis of the pediatric clinical trials conducted in accordance with the PIP are eligible for a six month extension of the protection under a supplementary protection certificate (if any is in effect at the time of approval) or, in the case of orphan medicinal products, a two year extension of the orphan market exclusivity. This pediatric reward is subject to specific conditions and is not automatically available when data in compliance with the PIP are developed and submitted.

Governments influence the price of medicinal products in the European Union through their pricing and reimbursement rules and control of national healthcare systems that fund a large part of the cost of those products to consumers. Some jurisdictions operate positive and negative list systems under which products may only be marketed once a reimbursement price has been agreed. To obtain reimbursement or pricing approval, some of these countries may require the completion of clinical trials that compare the cost-effectiveness of a particular product candidate to currently available therapies.

Other European Union Member States allow companies to fix their own prices for medicines, but monitor and control company profits. The downward pressure on healthcare costs in general, particularly prescription medicines, has become very intense. As a result, increasingly high barriers are being erected to the entry of new products.

Following the result of a referendum in 2016, the United Kingdom officially withdrew from the European Union on January 31, 2020, commonly referred to as Brexit. Pursuant to the formal withdrawal arrangements agreed between the United Kingdom and the European Union, the United Kingdom was subject to a transition period until December 31, 2020, during which European Union rules continued to apply. A trade and cooperation agreement, or the Trade and Cooperation Agreement, which outlines the future trading relationship between the United Kingdom and the European Union was agreed in December 2020 and formally entered into force on May 1, 2021.

Great Britain is no longer covered by the European Union’s procedures for the grant of marketing authorizations (Northern Ireland is covered by the centralized authorization procedure and can be covered under the decentralized or mutual recognition procedures). Various national procedures are now available to place a drug on the market in the United Kingdom, Great Britain, or Northern Ireland, with the main national procedure having a maximum timeframe of 150 days (excluding time taken to provide any further information or data required). The data exclusivity periods in the United Kingdom are currently in line with those in the European Union, but the Trade and Cooperation Agreement provides that the periods for both data and market exclusivity are to be determined by domestic law, and so there could be divergence in the future.

Orphan designation in Great Britain following Brexit is, unlike in the European Union, not available pre-marketing authorization. Applications for orphan designation are made at the same time as an application for a marketing authorization. The criteria to be granted an orphan drug designation are essentially identical to those in the European Union, but based on the prevalence of the condition in Great Britain. It is therefore possible that conditions that were or would have been designated as orphan conditions in Great Britain prior to the end of the Transition Period are or would no longer be and that conditions that were not or would not have been designated as orphan conditions in the European Union will be designated as such in Great Britain.

The European Union’s regulatory environment for clinical trials has been harmonized as part of the Clinical Trials Regulation, which entered into application on January 31, 2022. The MHRA has opened a consultation on proposed revisions to United Kingdom clinical trials legislation, but it is currently unclear as to what extent the United Kingdom will seek to align its regulations with the European Union.

The availability of coverage and adequate reimbursement by third-party payors, including governmental healthcare programs such as Medicare and Medicaid, private health insurers and managed care organizations, is essential for most patients to be able to afford drug products. Achieving acceptable levels of coverage and reimbursement for drug products by third-party payors affects a biopharmaceutical company’s ability to successfully commercialize, and attract collaboration partners to invest in, the development its drug products. Even if coverage is obtained from a third-party payor for a given drug product, the resulting reimbursement rates may not be adequate or may require co-payments that patients find unacceptably high. There is no guarantee that coverage and reimbursement will be provided for a given drug product, and any reimbursement that may become available can be decreased or eliminated in the future.

Third-party payors are increasingly challenging prices charged for drug products and services, and many third-party payors may refuse to provide coverage and reimbursement for particular drug products when an equivalent generic drug product or a less expensive therapy is available. It is possible that a third-party payor may consider a drug product and other therapies as substitutable and only offer to reimburse patients for the less expensive drug product or therapy. Even if a drug product shows improved efficacy or improved convenience of administration, pricing of existing drug products may limit the amount that can be charged for a new drug product. Third-party payors may deny or revoke the reimbursement status of a given drug product or establish prices for new or existing marketed drug products at levels that are too low to enable a biopharmaceutical company to realize an appropriate return on its investment in drug product development.

There is significant uncertainty related to third-party payor coverage and reimbursement of newly approved drug products. In the United States, third-party payors play an important role in determining the extent to which new drugs products will be covered. The Medicare and Medicaid programs increasingly are used as models for how private payors and other governmental payors develop their coverage and reimbursement policies for drug products. Some third-party payors may require pre-approval of coverage for new or innovative devices or drug products before they will reimburse health care providers who use such therapies.

Obtaining and maintaining reimbursement status is time-consuming and costly. No uniform policy for coverage and reimbursement for drug products exists among third-party payors in the United States. Therefore, coverage and reimbursement for drug products can differ significantly from payor to payor. As a result, the coverage determination process is often a time-consuming and costly process that requires the provision of scientific and clinical support for the use of a drug product to each payor separately. Furthermore, rules and regulations regarding reimbursement change frequently and, in some cases, upon short notice.

Outside the United States, international operations are generally subject to extensive governmental price controls and other market regulations. Increasing emphasis on cost-containment initiatives in Europe, Canada and other countries puts pressure on the pricing and usage of drug products. In many countries, the prices of drug products are subject to varying price control mechanisms as part of national health systems. Other countries allow companies to fix their own prices for drug products, but monitor and control company profits.

The delivery of healthcare in the European Union, including the establishment and operation of health services and the pricing and reimbursement of drug products, is almost exclusively a matter for national, rather than European Union, law and policy. National governments and health service providers have different priorities and approaches to the delivery of healthcare and the pricing and reimbursement of drug products in that context. In general, however, the healthcare budgetary constraints in most European Union member states have resulted in restrictions on the pricing and reimbursement of drug products by relevant health service providers.

Increasing efforts by governmental and third-party payors in the European Union, the United States and abroad to cap or reduce healthcare costs can cause such organizations to limit coverage and reimbursement for drug products. Additionally, a trend toward managed healthcare, and the influence of health maintenance organizations, have increased pricing pressure on the sale of drug products. The downward pressure on healthcare costs in general, particularly prescription drugs and surgical procedures and other treatments, has become very intense.

We compete in a highly innovative industry characterized by a rapidly growing understanding of disease biology, evolving technologies and strong intellectual property barriers to entry. While we believe that our DARPin platform and product candidates, strategic collaborations and scientific expertise may provide us with competitive advantages, our business may be impacted competitively from many different sources. We compete with a wide range of pharmaceutical companies, biotechnology companies, academic institutions and other research organizations for novel therapeutic biological targets, new technologies for optimizing antibodies, new scaffolds such as antibody fragments and other small protein-based therapeutics, talent, financial resources, intellectual property rights and collaboration opportunities. Many of our competitors have substantially greater scientific, research and product development capabilities, and greater financial, manufacturing, marketing and sales, and human resources than we do. In addition, there is intense competition for securing clinical trial sites as well as recruiting and registering patients for clinical trials. Many specialized biotechnology companies have formed collaborations with large, established companies to support the research, development and commercialization of products that may be competing with ours. Accordingly, our competitors may be more successful than we may be in developing, commercializing and achieving widespread market acceptance. Any product candidates that we successfully develop and commercialize from our platforms may compete with existing products and new products that may become available in the future.Finally, we also face competition on the DARPin technology, with other companies filing intellectual property on DARPins and striking collaborations with partners to develop DARPin therapeutics; however only we have gathered 20 years of experience with DARPin therapeutics in clinical development.

Competition in the oncology space is intense: common methods of treatment for cancer patients with cancer include surgery, radiation and drug therapy, and approved drugs and methods are widely accepted by physicians, patients and third-party payors. Yet, and in spite of recent progress, and intense competition, unmet medical needs remain high in oncology and call for new treatment options for patients. Competition is especially fierce in hematologic cancers, where several novel approaches including immune engagers, antibody-drug conjugates and cell therapies are becoming part of clinical practice, with next generation molecules and novel targeted approaches under development. AML is a particularly aggressive hematologic cancer and despite recent advancements in the field, most patients relapse after initial treatment. Less than a third of patients are still alive after five years, likely due to the inability of current approaches to effectively eliminate all AML cells (blasts and leukemic stem cells). MP0533, if approved, will enter a competitive market populated by other biologics and small molecules. However, we believe that MP0533 by virtue of its unique multi-targeting molecular design, has the potential to become a more effective and tolerable treatment option for AML and MDS patients, where significant unmet need remains.

Our multispecific cKIT x CD16a x CD47 Switch-DARPin is designed as a next-generation conditioning regimen for hematopoietic stem cell transplantation (HSCT) in AML and beyond. HSCT is an effective treatment against hematological conditions, and it is often performed after administration of intensive chemotherapy regimens and immunosuppressants to maximize its efficacy. However, many older and frailer patients are often ineligible for such conditioning regimens, and instead undergo more tolerable treatments that are associated with relatively shorter durability and poorer outcomes.

Additionally, novel therapies recently approved for non-malignant hematologic conditions such as sickle cell disease also require a conditioning step. Many patients affected by such non-lethal conditions need a safer option to avoid treatment-related toxicities and other complications such as infertility. The field of HSCT conditioning continues to see multiple treatment modalities and new approaches emerging from different competitors that our Switch-DARPin program will likely face. By acting only on hematopoietic stem cells, our Switch-DARPin candidate has the potential to offer a more tolerable, highly effective option to prepare patients with malignant and non-malignant hematologic conditions for HSCT and maximize their chances to increase long-term disease control or even be cured in some cases.

Radioligand therapy (RLT) is a rapidly emerging field in oncology, with over 100 companies developing therapeutic candidates across indications. In addition to a few already approved drugs, several alpha and beta emitting isotopes are being tested, as well as a variety of vectors, including monoclonal antibodies, small molecules and other low molecular weight protein-based scaffolds. Our DARPin radioconjugates, beginning with our frontrunner DLL3 program, will face competition from several other RLT developers. However, we believe DARPin features make them especially well suited as vectors due to their tunability and manufacturing properties.

If approved for solid tumors, MP0317 would compete with agents that are currently in development such as monoclonal antibodies, or mAbs, including bispecifics and fusion proteins, and small molecule approaches.

Our commercial opportunity could be reduced or eliminated if our competitors’ products prove to be safer and more tolerable, more effective, more convenient to dose, less expensive, faster to approve, or more effectively marketed and reimbursed than any of our product candidates that may gain regulatory approval. In addition, the level of generic competition and the availability of reimbursement from government and other third-party payors will impact the commercial viability of our programs.

We do not currently own or operate manufacturing facilities for the production of clinical or commercial quantities of our DARPin product candidates. We utilize third-party contract manufacturers for the manufacture of drug substances and product candidates for human use. Since we rely on third-party contract manufacturers to produce our proprietary product candidates, we have recruited personnel with experience to manage the third-party contract manufacturers that will produce our proprietary product candidates in clinical or commercial quantities.

We design and develop the manufacturing process for the mono-DARPin proteins and multi-DARPin product candidates that are included in our DARPin product candidates, whether or not they are partnered. For purposes of our and our partner’s DARPin preclinical studies, we supply high quality gram scale DARPin material that we produce in our own facilities. We have fermenter volumes up to ten liters, which provides us with sufficient capacity to produce the quantities needed for DARPin preclinical studies.

As of December 31, 2023, we had 167.5 full-time equivalent employees (December 31, 2022: 175.3 full-time equivalents). None of our employees are represented by collective bargaining agreements. We believe that we maintain good relations with our employees. At each date shown, we had the following number of full-time equivalent employees, broken out by department.

The majority of our employees are based in Zurich, Switzerland. Three of our employees are based in the United States of America (two as of December 31, 2022)

The following diagram illustrates our corporate structure:

We lease our principal executive office and laboratory space, animal facility and other facilities, consisting of an aggregate of 3,200 square meters, in Zurich-Schlieren, Switzerland. The leases for our principal executive office and laboratory space expire on December 31, 2026. We also have an office in Massachusetts for our U.S. subsidiary, Molecular Partners Inc. consisting of 19 square meters.

We believe our current facilities are sufficient to meet our short-term needs. If we need to add new facilities or expand existing facilities as we add employees, we believe that suitable additional space will be available to accommodate any such expansion of our operations.

We are a clinical-stage biotechnology company pioneering the design and development of DARPin therapeutics for medical challenges that other drug modalities cannot readily address. We have programs in various stages of preclinical and clinical development, currently with main focus on oncology.

DARPin therapeutics are a new class of custom-built protein drug candidates based on natural binding proteins that have the potential to unlock new dimensions of multi-functionality and multi-target specificity in drug design. Our DARPin candidates have been extensively tested in preclinical studies and clinical trials, including in more than 2,500 patients, and have been observed to be highly active and generally well-tolerated. By harnessing DARPins’ intrinsic advantages and leveraging our two decades of experience and leadership with DARPins, we believe our DARPin platform can close the gap between small molecule and antibody medicines as a new therapeutic modality poised to offer clinical breakthroughs.

We were founded in 2004 by the inventors of DARPins. Our senior management, which includes two of our group’s co-founders, has significant prior experience in oncology, research, drug development and finance. Members of our leadership team have served as senior executives at other well-established companies including Amgen, Bavarian Nordic, Genentech, GSK, J&J, Novartis, Roche, and Tesaro. Additionally, our board of directors includes current and former senior executives of AbbVie, Biogen, Novartis, Roche and Takeda (Millennium Pharmaceuticals, Shire). We have collaboration agreements with Novartis and Orano Med, as well as other third party collaborators.

Our operations to date have focused upon organizing and staffing our company, business planning, raising capital, developing our DARPin platform and conducting research, preclinical studies and clinical trials with DARPin therapeutics. We do not have any products approved for sale.

For the year ended December 31, 2023, we incurred a negative net result, attributable to shareholders of CHF 62.0 million; for the year ended December 31, 2022, we incurred a positive net result, attributable to shareholders of CHF 117.9 million; and for the year ended December 31, 2021, we incurred a negative net result of CHF 63.8 million. As of December 31, 2023, we had cumulative losses of CHF 191.8 million.

From inception through December 31, 2023, we have received a total of CHF 446.2 million in funding from our major partnership agreements and we have obtained a total of CHF 322.5 million in eight equity financing rounds, net of cost of capital increases. Since November 2014, we have been listed on the SIX Swiss Exchange, or SIX, under the symbol “MOLN.” Since June 16, 2021, we have also been listed on the Nasdaq Global Select Market, under the symbol “MOLN.” As of December 31, 2023, we had cash and cash equivalents plus short-term time deposits of CHF 186.9 million.

Unfavorable conditions in the economy both in the United States and abroad may negatively affect the growth of our business and our results of operations. For example, macroeconomic events, including a health pandemic, rising inflation, the U.S. Federal Reserve and other financial regulatory agencies raising interest rates, the Russia-Ukraine war and the Israel-Hamas war, have led to economic uncertainty globally. The effect of macroeconomic conditions may not be fully reflected in our results of operations until future periods. If, however, economic uncertainty increases or the global economy worsens, our business, financial condition and results of operations may be harmed. For further discussion of the potential impacts of macroeconomic events on our business, financial condition, and operating results, see the section titled “Risk Factors.”

On January 5, 2024 we announced we entered into a co-development agreement with Orano Med to co-develop 212Pb-based Radio Darpin Therapies (RDT). Under the terms of the co-development agreement, our previously disclosed RDT target DLL3 (delta-like ligand 3) will be included in the collaboration with Orano Med.

Both companies are developing additional radioligand therapy candidates in partnership with other companies, with us having announced our first collaboration with Novartis in December 2021. DLL3 will be exclusively developed by Molecular Partners and Orano Med as a RDT target.

On December 14, 2021, we entered into the Novartis Radioligand Agreement with Novartis to develop DARPin-conjugated radioligand therapeutic candidates for oncology.

In January 2022, we received a non-refundable upfront payment of $20 million (CHF 18.6 million) from Novartis. In addition, we are eligible to receive milestone payments of up to $560 million relating to development, regulatory and commercialization activities plus tiered royalties based on commercial sale levels from mid-single digit to low double-digit percentages of net sales of licensed products for a specified period beginning with the first commercial sale of a licensed product in a given country of sale and expiring on the latest of (a) the expiration of the last valid claim covering such product, (b) ten years after such sale, and (c) expiration of regulatory exclusivity.

In October 2020, we entered into an agreement with Novartis, granting Novartis the exclusive option to in-license global rights in relation to MP0420 (ensovibep). Under the terms of the Option and Equity Rights Agreement, in 2020 we received an upfront, non-refundable fee of CHF 20 million for the technology transfer and manufacturing of MP0420.

In January 2023, Novartis informed us that it has submitted a request to withdraw, with an effective date of January 25, 2023, the Emergency Use Authorization (EUA) application from the FDA for ensovibep.

On January 5 2024, the Ensovibep License Agreement for the treatment of COVID-19 was terminated and Novartis has returned the rights to the ensovibep program to us. Clinical work on the ensovibep program ended in 2022 and the program remains terminated.

On August 11, 2020, we announced the reservation by the FOPH of a defined number of initial doses of our anti-COVID-19 candidate, MP0420. Under the terms of the agreement, we received a reservation fee of CHF 7.0 million which resulted in a contract liability of CHF 7.0 million. With the exercise of the option by Novartis in January 2022 and the subsequent assignment of the agreement to Novartis, we recognized the CHF 7.0 million contract liability as revenue in 2022.

In December 2018, we entered into the Amgen Collaboration Agreement for the clinical development and commercialization of MP0310 / AMG 506.

Under the agreement, we granted to Amgen an exclusive worldwide, royalty-bearing, sublicensable license under our patents and know-how relating to MP0310 / AMG 506 to develop and commercialize MP0310 / AMG 506.

In April 2022, Amgen informed us of its decision to return the global rights of MP0310 to us following a strategic pipeline review.

We currently hold a non-exclusive perpetual license from the University of Zurich on patent applications and patents relating to Phage Display technology. The amount we are required to pay is CHF 10,000 per annum.

As described above, we have entered into licensing and collaboration agreements pursuant to which we generally have been and will be entitled to upfront fees and milestone payments upon the achievement of predetermined development, regulatory and sales events. Our revenue to date has primarily consisted of amounts received under our collaboration agreements, including upfront fees, option exercise fees, milestone payments and sponsored research payments. In addition, under the collaboration agreements, we will generally be entitled to royalty payments on the net sales of products ultimately developed and commercialized under our partnerships. For any of our proprietary product candidates that we have not yet licensed, we may decide to retain all or a portion of the commercialization rights. To date, we have not generated any revenue from commercial product sales.

Our revenue may vary substantially from quarter to quarter and year to year, depending on the structure and timing of milestone events, as well as the development and marketing strategies of commercialization partners from whom we will be entitled to receive royalty and other payments. We believe that period-to-period comparisons of our results of operations are therefore not meaningful and should not be relied on or to be indicative of our future performance.

Our operating expenses consist primarily of costs associated with research, preclinical studies and clinical testing, personnel-related costs and, to a lesser extent, royalty and license fees, facility expenses, professional fees for legal, tax, audit and strategic purposes, administrative expenses and depreciation of property, plant and equipment.

We expect our operating expenses to increase as compared to prior periods in connection with our ongoing activities, particularly as we continue the development of our proprietary product candidates, expand our proprietary product pipeline and invest in our DARPin platform. Our operating expenses may vary substantially from period to period mainly driven by the timing of enrollment of patients in clinical trials and other research and development activities. Following our listing on the Nasdaq Global Select Market in June 2021, we have and expect to continue to incur additional costs associated with operating as a public company in the United States.

Research and development expenses consist primarily of compensation and other expenses related to:

•Research and development personnel;

•Preclinical studies and clinical trials of our product candidates, including the costs of manufacturing the product candidates;

•Research and services under our partnership agreements; and

•Attributable facility expenses, including depreciation and amortization of equipment and any intangible research and development assets.

From inception through December 31, 2023, we cumulatively have spent approximately CHF 480 million on research and development activities which we classify as research and development expense for financial reporting purposes.

At this time, we cannot reasonably estimate the nature, timing and estimated costs of the efforts that will be necessary to complete the development of, or the period, if any, in which material net cash inflows may commence from, any of our product candidates. This is due to numerous risks and uncertainties associated with developing product candidates, including the uncertainty of:

•the scope, rate of progress, results and cost of our clinical trials, preclinical studies and other related activities;

•the cost of manufacturing clinical supplies and establishing commercial supplies of our product candidates and any products that we may develop;

•the number and characteristics of product candidates that we pursue;

•the cost, timing, and outcomes of regulatory approvals;

•the cost and timing of establishing sales, marketing and distribution capabilities; and

•the terms and timing of any collaborative, licensing and other arrangements that we may establish, including any required milestone and royalty payments thereunder.

A change in the outcome of any of these variables with respect to the development of any of our current or future product candidates could mean a significant change in the costs and timing associated with the development of such product candidates.

At this time, due to the inherently unpredictable nature of preclinical and clinical development and given the early stage of many of our programs and/or product candidates, we generally do not track our internal research and development expenses on a program-by-program basis as they primarily relate to personnel, research and consumable costs, which are deployed across multiple projects under development. A portion of our research and development costs are external costs, which we do track on a program-by-program basis following the program's nomination to the development candidate stage. Included in table below are our external research and development expenses as well as external clinical and regulatory costs, presented by our most significant programs:

We charge all research and development expenses, including internal patent filing and patent maintenance costs, to research and development expenses when incurred, as the criteria for capitalization are currently not met.

Our selling, general and administrative costs principally consist of salaries and related benefits, including share-based compensation, for personnel in our executive, finance and other administrative functions. Other selling, general and administrative costs include facility-related costs and professional services fees for auditing, tax and general legal services, as well as expenses associated with the requirements of being a listed public company listed both in Switzerland on the SIX and in the United States on Nasdaq.

Financial income consists primarily of interest earned on our cash and cash equivalents and short-term time deposits as well as realized and unrealized gains of foreign exchange. The financial expenses are driven by realized and unrealized foreign exchange losses and negative interest on certain cash balances.

We have operating entities in two jurisdictions. In Switzerland, due to losses incurred to-date, we have not paid any income taxes since inception. For our U.S. based activities, we have paid the required tax amounts of both federal and state taxes, which are not material to our financial results.

We are entitled under Swiss laws to carry forward any losses incurred for a period of seven years and can offset our losses carried forward against future taxes. As of December 31, 2023, in Switzerland, we had tax loss carry-forwards totaling CHF 144.5 million. No deferred tax assets have been recognized for these tax loss carry-forwards because as of December 31, 2023, it was not probable that such loss carry-forwards can be utilized in the foreseeable future. In addition, no deferred tax assets were recognized on other deductible temporary differences (e.g.

pension liabilities) due to the significant tax losses carried forward.

The following table sets forth summaries of our statements of income for the years ended December 31, 2023, 2022 and 2021 (in thousands CHF):

In the year ended December 31, 2023, we recognized total revenues and other income of CHF 7.0 million, a decrease of CHF 182.6 million compared to the previous year. Revenues in the year ended December 31, 2023, were exclusively driven by the Novartis Radioligand Agreement. The revenue in 2022 largely related to the Novartis Option and Equity Rights Agreement.

The revenue in the year ended December 31, 2021, related largely to the Amgen Collaboration Agreement]. In 2023 and 2022 we also recorded other income related to agency fees that were invoiced to Novartis.

In the year ended December 31, 2023, total operating expenses decreased by CHF 4.9 million to CHF 68.1 million (2022: CHF 73.0 million, 2021: CHF 73.2 million). These costs included CHF 5.7 million in non-cash effective share-based compensation and pension costs as well as CHF 2.4 million in depreciation.

The two major expense categories were consistently personnel expenses of CHF 40.0 million (59% of total operating expenses) and research consumables and project costs totaling CHF 15.9 million (23% of total operating expenses).

Total research and development expenses in the year ended December 31, 2023, were CHF 48.7 million (2022: CHF 50.7 million, 2021: CHF 55.7 million). We charge all research and development expenses, including internal patent filing and patent maintenance costs, to the statement of operations when incurred.

Total selling, general and administrative expenses in the year ended December 31, 2023, decreased by CHF 2.9 million (13%) to CHF 19.4 million (2022: CHF 22.3 million, 2021: CHF 17.5 million), mainly reflecting the first full 12 month period of directors and officers insurance cost and professional services costs associated with our June 2021 listing on the Nasdaq Global Select Market as well as growth in personnel costs for the administrative functions.

In the year ended December 31, 2023, we recorded a net financial gain of CHF 0.9 million, mainly driven by interest income and exchange losses on the cash positions held in foreign currencies, whereas in the year ended December 31, 2022, there was a net financial gain of CHF 1.2 million also mainly driven by interest income and foreign exchange gains (2021: net financial loss of CHF 0.4 million). Financial income / expense in all three years are primarily driven by foreign exchange results on the cash positions held in foreign currencies.

The Swiss legal entity of the Company did not have to pay or accrue any income taxes during the reporting period, as the Company incurred a taxable loss in 2023. Including the net operating loss for the year ended December 31, 2023, the remaining tax losses of CHF 144.5 million may be used as tax loss carryforwards to offset future taxable income over a period of seven years. No deferred tax assets have been recognized for these tax loss carryforwards, because at December 31, 2023, we determined it was unlikely that such loss carryforwards could be utilized in the foreseeable future.

Future taxable income in Switzerland will be subject to federal, cantonal and communal income taxes. The applicable income tax rate in Switzerland for the year ended December 31, 2023 was 19.3%.

From inception through December 31, 2023, we have raised an aggregate of CHF 322.5 million of net proceeds from the sale of our ordinary shares to founders and investors and collected cash under our partnership agreements in an aggregate amount of CHF 446.2 million. Our primary uses of cash is to fund our ongoing research and development activities and other operating expenses. We currently have no ongoing material financing commitments, such as lines of credit or guarantees.

As of December 31, 2023, we had CHF 186.9 million in cash and cash equivalents and short-term time deposits. We are investing our cash in risk-free money market instruments in line with our treasury guidelines to accommodate our financial needs over time.

We expect our expenses to increase in connection with our ongoing activities, particularly as we continue the research and development of, continue or initiate clinical trials of, and seek marketing approval for, our product candidates. In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant commercialization expenses related to program sales, marketing, manufacturing and distribution to the extent that such sales, marketing and distribution are not the responsibility of current or future collaborators. Furthermore, following our June 2021 listing on the Nasdaq Global Select Market, we have and will continue to incur additional costs associated with operating as a public company in the United States. If we are unable to raise capital when needed or on attractive terms, we would be forced to delay, reduce or eliminate our research and development programs or future commercialization efforts.

All short-term time deposits at December 31, 2023 and 2022 were held with Swiss banks. Please refer to note 25 to our consolidated financial statements as of and for the year ended December 31, 2023 included elsewhere in this Annual Report on Form 20-F.

During the year ended December 31, 2023, operating activities used CHF 59.0 million of cash, primarily as a result of the negative net result attributable to shareholders of CHF 62.0 million.

During the year ended December 31, 2022, operating activities generated CHF 118.6 million of cash, primarily as a result of the positive net result attributable to shareholders of CHF 117.8 million driven by the revenue generated by the option exercise by Novartis.

During the year ended December 31, 2021, operating activities used CHF 91.0 million of cash, primarily as a result of the negative net result attributable to shareholders of CHF 63.8 million together with a reduction in contract liability and an increase in trade and other receivables following the Novartis license and collaboration agreement signed in December 2021.

During the years ended December 31, 2023, 2022 and 2021, cash used in, or from investing activities primarily related to movements in investments in short-term time deposits of CHF 41.6 million, and cash used in investing activities of CHF 100.2 million and CHF 21.0 million, respectively.

During the years ended December 31, 2023, 2022 and 2021, we recorded a cash outflow for the acquisition of property, plant and equipment and intangible assets of CHF 0.8 million, CHF 1.4 million and CHF 1.3 million, respectively.

During the years ended December 31, 2023, 2022 and 2021, we recorded a cash inflow on interest received of CHF 3.8 million, CHF 0.5 million and CHF 0.1 million, respectively.

During the year ended December 31, 2023, net cash used in financing activities was CHF 1.2 million, driven primarily by payments of our lease liabilities. During the year ended December 31, 2022, net cash used in financing activities was CHF 1.6 million, driven primarily by payments of our lease liabilities and the investment related to the creation of treasury shares. During the year ended December 31, 2021, net cash from financing activities was CHF 50.6 million, primarily related to the proceeds from issuance of new shares, net of transaction costs, following our initial public offering of ADSs in the U.S. in June 2021.

We believe that our existing cash and cash equivalents and short-term time deposits as of December 31, 2023, will be sufficient to fund our operating expenses and capital expenditure requirements well into 2026. However, our present and future funding requirements may change and will depend on many factors, including, among other things:

•timelines for preclinical and clinical development programs;

•change in product development plans needed to address any set-backs in our research and development activities;

•scope, prioritization and number of clinical trials and research and development activities;

•rate of progress and cost of the clinical trials, and other research and development activities;

•terms and timing of any collaborative, licensing and other arrangements that may be established;

•costs and timing of preparing, filing, prosecuting, maintaining, defending and enforcing patent claims and other intellectual property rights;

•the need or decision to acquire or license complementary compounds, technologies or complementary businesses or companies;

•regulatory approval, manufacturing or commercialization of our product candidates for which we receive marketing approval through partners;

•costs, timing and outcome of regulatory review of our product candidates;

•costs and timing of future commercialization activities, including drug manufacturing, marketing, sales and distribution, for any of our product candidates for which we receive marketing approval;

•changes in regulatory policies or laws that affect our operations; and

•competing medical treatment and market developments.

We expect our operating expenses to increase over the next several years as we expand our research and development activities. Until such time as we can generate significant revenue from product sales or royalties, if ever, we expect to finance our operations through a combination of public or private equity and debt financings or other sources, including payments upon achievement of certain development, regulatory and sales milestone events and royalty payments under our existing partnership agreements, and future collaborations with other third parties. To the extent that we raise additional capital through the sale of equity or convertible debt securities, our shareholders' ownership interest may be diluted, and the terms of any additional securities may include liquidation or other preferences that adversely affect the rights of our shareholders. Debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise funds through additional collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or to grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

For a discussion of our research and development activities, see “Item 4.B-Business Overview” and “Item 5.A-Operating Results.”

For a discussion of trends, see “Item 5.A-Operating Results” and “Item 5.B-Liquidity and Capital Resources.”

A. Directors and Senior Management.

The following table sets forth information regarding our executive officers, also referred to as members of the Management Board, and directors as of December 31, 2023. Unless otherwise stated, the business address for our directors and executive officers is c/o Molecular Partners AG, Wagistrasse 14, 8952 Schlieren, Switzerland.

Dr. Patrick Amstutz, Ph.D., one of our founders, has served as our Chief Executive Officer since November 2016, as an executive director since 2017 and as a member of the Company’s management team since its inception in 2004. Previously, he served as our Chief Operating Officer from 2014 to 2016 and as our Chief Business Officer from 2006 to 2014. Since 2017, Dr. Amstutz has served as Vice-President of the Board of the Swiss Biotech Association. Dr. Amstutz holds a Master of Science from the ETH Zurich and a Ph.D. in molecular biology from the University of Zurich. Our board of directors believes that Dr. Amstutz's leadership of our company since its inception as well as his scientific background provide him with the qualifications and skills to serve as a director.

Renate Gloggner has served as EVP People and Community and a Member of the Management Board of Molecular Partners since July 2022. She joined the Company in October 2021. Prior to joining Molecular Partners, Renate held European and International Human Resource leadership positions at two US companies, Global Blood Therapeutics and Tesaro Bio. In both companies, she built strong teams with an engaging culture in the European headquarter as well as in several European countries, allowing these teams to successfully gain market access and launch products. Renate began her career in biotech at Biogen and Amgen working in a variety of HR roles in the international headquarter as well as in country roles. She holds an MBA from the University of Bern, Switzerland and an executive coaching degree from the University of the West of England, Bristol.

On August 24, 2023, the Company announced the departure of the Chief Medical Officer Dr. Nicolas Leupin, M.D., PhD by end of 2023 for personal reasons.

Dr. Nicolas Leupin, M.D., Ph.D., served as our Chief Medical Officer since September 2019 until December 31, 2023. Dr. Leupin is a medical oncologist with a successful track record in drug development, most recently as Chief Medical Officer of argenx from 2016 to 2019, a clinical-stage biotechnology company developing antibody-based therapies for treatment of severe autoimmune diseases and cancer. In that role he led the company’s global clinical strategy and execution, successfully supporting the company’s transformation into a late-stage clinical company, and was responsible for translating preclinical hypotheses into innovative proof-of concept clinical trials. Prior to argenx, Dr. Leupin held roles of increasing responsibility at Celgene, where he supported the clinical development of several drug candidates in lymphoma and multiple myeloma, resulting in regulatory filings in Europe and the United States.

Dr. Michael Tobias Stumpp, Ph.D., one of our founders, has served as EVP Projects and a Member of the Management Board of Molecular Partners. Michael is a co-founder of Molecular Partners and was part of the team that invented the DARPin technology. Michael previously served as Chief Scientific Officer of Molecular Partners, in which capacity he oversaw development of the DARPin pipeline. He started his scientific career at the ETH Zurich and then progressed to the Imperial College London and the Tokyo Institute of Technology. Michael has published his research in many international, peer-reviewed scientific journals and presented his findings at numerous congresses.

Alexander Zürcher has served as Chief Operating Officer and a Member of the Management Board of Molecular Partners since 2022. Prior to this role, he served as SVP of Development, where he oversaw project and portfolio management, manufacturing, pharmacology, and quality assurance activities. Alexander has also previously been VP Operations and Director of CMC. He has more than 20 years of industry experience, with prior work in drug development as Director of Drug Product Development at Cytos Biotechnology and Head of R&D Operations at Spirig Pharma. Alexander holds a M.Sc. degree in biology from the University of Basel, as well as a Certificate of Advanced Studies in Business Management from the University of Zurich.

William M. Burns has served as Chairman of our board of directors since April 2018 and a director since October 2017. His professional career has been spent in the Life Sciences sector. His career in Roche took him to CEO of the Pharma Division and to the Boards of Genentech and Chugai. From 2010 to 2014 he also served as a Non-Executive Director of F Hoffmann La Roche. He is currently chair of Vestergaard sarl, vice chair of Mesoblast in Australia and is a Trustee of the Institute of Cancer Research in London. He also serves on a Cancer Advisory board to the Universities of Aachen/Bonn/Cologne and Dusseldorf. Mr. Burns holds an honors degree in economics from the University of Strathclyde, Glasgow, Scotland. Our board of directors believes that Mr. Burns' experience with the healthcare and pharmaceutical industries and his broad management experience provide him with the qualifications and skills to serve as a director.

Dr. Agnete Fredriksen has served as a director since April 2021. Dr. Fredriksen has served as a co-founder and chief business officer of Nykode Therapeutics AS (formerly Vaccibody AS) since August 2022, as chief innovation and strategy officer from July 2021 to July 2022 and as president and chief scientific officer from 2017 to June 2021. Nykode Therapeutics is a clinical-stage biopharmaceutical company dedicated to the discovery and development of novel immunotherapies for cancer and infectious diseases. Prior to founding Vaccibody Dr. Fredriksen previously held researcher roles at Affitech AS, a private technology transfer company, and Medinnova AS, a technology transfer company. Dr. Fredriksen is the author of numerous scientific papers in the field of immunology, immunotherapy and vaccines, and has been awarded several patents in the field of immunotherapy. She holds an MSc and a Ph.D. from the Institute of Immunology, Oslo University Hospital, Rikshospitalet in Oslo, Norway. Our board of directors believes that Dr. Fredriksen’s experience in immunotherapy and vaccine development, as well as her medical and scientific background, provide her with the qualifications and skills to serve as a director.

Dr. Dominik Höchli has served as a director since April 2021. He has more than 20 years of experience as a marketing and medical affairs executive. Since spring 2021 he is the CEO of Catapult Therapeutics, a clinical stage biotech company in the Netherlands. Previously he worked at AbbVie as Vice President, Head of Global Medical Affairs and member of the R&D and the Commercial leadership team. He led global product launches for major blockbuster products, including HUMIRA, Maviret, Venetoclax and Skyrizi, and his leadership experience ranges from smaller country organizations to large global functions.

He began his corporate career at McKinsey & Co. Dr. Höchli is a Swiss national and obtained his medical degree (M.D.) from the University of Bern in Switzerland. Our board of directors believes that Dr. Höchli’s over 20 years of experience as a marketing and medical affairs executive, as well as his broad business experience provide him with the qualifications and skills to serve as a director.

Steven H. Holtzman has served as a director since May 2014. He has served as chair of the board of directors of, and strategic business advisor to, CAMP4 Therapeutics Corporation, a private biopharmaceutical company, since October 2019, executive chair of the board of directors of, and a strategic business advisor to, Qihan Biotech, a private biopharmaceutical company, since April 2019, and as a founder, a strategic business advisor, and a member and the lead independent director of the board of directors of Shoreline Bio, a private biopharmaceutical company, since June 2020. From July 2016 to January 2020, Mr. Holtzman was the first President and Chief Executive Officer and a member of the board of directors of Decibel Therapeutics, Inc., a public biopharmaceutical company. From January 2011 to March 2016, he served as the Executive Vice President of Corporate Development at Biogen, Inc., a public biopharmaceutical company. From 2001 to 2010, he served as a founder, chair of the board of directors, and Chief Executive Officer of Infinity Pharmaceuticals, Inc., a public biopharmaceutical company. Additionally, Mr. Holtzman was Chief Business Officer of Millennium Pharmaceuticals, Inc., a public biopharmaceutical company, from May 1994 to June 2001, and a founder, member of the board of directors, and Executive Vice President of DNX Corporation, a public biopharmaceutical company, from August 1986 to March 1994. He is a trustee of The Berklee College of Music and a Senior Fellow at the Belfer Center for Science and International Affairs at the Harvard Kennedy School. He received his B.A. in Philosophy from Michigan State University and his B.Phil. in Philosophy from Corpus Christi College, Oxford University, which he attended as a Rhodes Scholar. Our board of directors believes that Mr. Holtzman's experience in the biotechnology industry and his broad management experience provide him with the qualifications and skills to serve as a director.

Sandip Kapadia has served as a director since April 2020. Mr. Kapadia brings over 25 years of science industry experience and has served as the Chief Financial Officer (CFO) for Harmony Biosciences since March 2021. Previously Mr. Kapadia was CFO for Intercept Pharmaceuticals. Before Intercept, Mr. Kapadia served in various leadership capacities within finance for more than 19 years at Novartis International AG and Novartis affiliates in the United Kingdom, Netherlands, Switzerland and the US. Mr. Kapadia received a B.S. in Accounting from Montclair State University and an M.B.A. from Rutgers University, and is also a US Certified Public Accountant. Mr. Kapadia currently serves on the board of directors of Passage Bio, and previously on the board of directors of VectivBio Holding AG and Therachon AG. We believe that Mr. Kapadia is qualified to serve on our board of directors due to his leadership experience in the biopharmaceutical industry and finance expertise. Our board of directors believes that Mr. Kapadia’s over 25 years of experience in the life science industry and his broad finance and management experience provide him with the qualifications and skills to serve as a director.

Dr. Vito J. Palombella, Ph.D., has served as a director since April 2020. Vito J. Palombella, Ph.D., has over 30 years of scientific leadership and experience advancing first-in-class therapeutic programs, as well as a successful track record of building drug discovery and development organizations. Currently, Dr. Palombella is the chief scientific officer of TRIANA Biomedicines. Prior to joining TRIANA, Dr. Palombella was the Chief Scientific Officer of Surface Oncology from January 2016 to August 2023, where he was responsible for drug discovery and preclinical development. Prior to Surface Oncology, Dr. Palombella was executive vice president and chief scientific officer from May 2010 to January 2016, and vice president, biology/research, from 2004 to 2010, at Infinity Pharmaceuticals, Inc., where he was responsible for drug discovery and preclinical development. Prior to that, he was director of molecular biology and protein chemistry at Syntonix Pharmaceuticals, and senior director of cell and molecular biology at Millennium Pharmaceuticals and held a number of positions at LeukoSite and ProScript.

Dr. Palombella was involved in the discovery and development of bortezomib (Velcade®), a proteasome inhibitor, and duvelisib (Copiktra®), a PI3K-d/g inhibitor, both for cancer therapy. Dr. Palombella earned his bachelor’s degree in microbiology from Rutgers University and a master’s degree and doctorate degree in viral oncology and immunology from the New York University Medical Center and completed his post-doctoral training at Harvard University. Our board of directors believes that Dr. Palombella’s over 30 years of scientific leadership and experience, as well as his medical and scientific background, provide him with the qualifications and skills to serve as a director.

Dr. Michael Vasconcelles, M.D., is currently Executive Vice President, Research, Development, and Medical Affairs at Immunogen. He was most recently the chief medical officer and Head of the Medical and Scientific Organization at Flatiron Health, a healthcare technology and services company focused on creating digital solutions to accelerate cancer research and improving patient care. Prior to joining Flatiron Health in 2019, Dr. Vasconcelles served as the Chief Medical Officer of Unum Therapeutics Inc. (Unum) from 2015-2019. A Cambridge, MA-based cell and gene therapy company, Prior to Unum, Dr. Vasconcelles spent several years at Takeda/Millennium, where he was Senior Vice President, Head of the Oncology Therapy Area Unit and member of the R&D Executive Team, accountable for strategic and operational oversight of the oncology research and development portfolio globally. Prior to Takeda/Millennium, Dr. Vasconcelles was Group Vice President and the Global Therapeutic Area Head, Transplant and Oncology, at Genzyme Corporation, where he was responsible for clinical development of the transplant and oncology portfolio and a member of the Transplant and Oncology Business Unit Management Team. Following Sanofi’s acquisition of Genzyme, Dr. Vasconcelles joined Sanofi Oncology as Head, Personalized Medicine and Companion Diagnostics. From 1996 -2021, Dr. Vasconcelles was a faculty member of the Harvard Medical School and an associate physician at Brigham and Women’s Hospital and Dana-Farber Cancer Institute. He received both his B.A. and M.D. from Northwestern University. Our board of directors believes that Dr.Vasconcelles’ extensive experience in the life sciences industry and clinical development programs, as well as his medical and scientific background, provide him with the qualifications and skills to serve as a director.

The table below provides certain highlights of the composition of our board members and nominees. Each of the categories listed in the below table has the meaning as it is used in Nasdaq Rule 5605(f).

There are no family relationships among any of our executive officers or directors.

The aggregate compensation paid by us to our executive officers and directors, including share-based compensation, for the year ended December 31, 2023, was CHF 5,288,000. Out of this amount a total of CHF 417,000 related to pension benefits and social security contributions.

As required by the "Say on Pay" rules, our articles of association set out the principles for the elements of the compensation of the members of our board of directors. The compensation of the members of our board of directors may consist of fixed and variable compensation. The total compensation takes into account the position and level of responsibility of the respective member of the board of directors, including board and committee chairmanship and membership and a travel fee. Members of our board of directors are paid for their service over one year starting with their election at the ordinary shareholders’ meeting and ending with the subsequent ordinary shareholders’ meeting. Our shareholders at the 2022 annual general meeting held on April 13, 2022, set the maximum aggregate amount of compensation for the board of directors for their term of office until the 2023 general meeting at CHF 1,091,400.

Our shareholders at the 2023 annual general meeting held on April 4, 2023, set the maximum aggregate amount of compensation for the board of directors for their term of office until the 2024 general meeting at CHF 1,091,400.

For the year ended December 31, 2023, the compensation of the members of our board of directors consisted of fixed compensation only. Compensation of the members of our board of directors for the year ended December 31, 2023 consisted of a fixed cash fee and restricted share units, or RSUs. The following table sets out information regarding the compensation earned by our directors for service on our board of directors during the year ended December 31, 2023. Dr. Amstutz, our Chief Executive Officer and a member of our board of directors, does not receive any additional compensation for his service as a director.

(1)The total compensation awarded to the members of the board of directors shown in this table does not include the payments of TCHF 17 we made in 2023 to cover the mandatory employer social security contribution on the base fees and the vesting of the RSUs 2020. In addition, upon vesting of the RSUs 2023 in 2026, we will be obliged to make employer contributions to social security pursuant to applicable mandatory law. As an estimate based on currently applicable contribution rates, the employer contributions on the RSUs 2023 expected to vest in 2026 will amount to TCHF 26.

(2)For our Chief Executive Officer’s compensation other than in connection with his service on our board of directors, please refer to “— Executive Compensation.”

As of December 31, 2023, all members of our board of directors were non-executives, except for Dr. Amstutz. None of the members of our board of directors has any significant business connections with the Company or was a member of the Management Board of the Company, except for Dr. Amstutz, who has been a member of the Management Board since the Company's inception in 2004.

Except as described in the section of this Annual Report on Form 20-F entitled “Related Party Transactions—Agreements with Our Directors and Executive Officers”, there are no arrangements or understandings between us and any of our directors providing for benefits upon termination of their service as our directors.

The compensation of the Management Board, also referred to herein as our executive officers, may consist of fixed and variable compensation. Fixed compensation comprises the base salary and the corresponding pension contributions.

Variable compensation comprises short-term and long-term variable compensation elements:

•the short-term variable compensation, paid as a cash bonus, is determined exclusively by the achievement of predefined annual corporate goals; and

•the long-term variable compensation, granted as Performance Share Units, or PSUs, is determined based on (i) the achievement of annual corporate goals, (ii) the achievement of long-term value-driving milestones outside of such corporate goals and (iii) the development of the share price of the Company.

The following table sets out information regarding compensation earned by members of the Management Board during the year ended December 31, 2023.

(1)Represents amounts earned in 2023.

(2)Represents pension and social security contributions during 2023 on base salary, bonus and the vesting of the PSUs 2020.

(3)In addition, upon vesting of the PSUs 2023 in 2026, we will be obliged to make employer contributions to social security pursuant to applicable mandatory law. As an estimate based on currently applicable contribution rates, the employer contributions on the PSUs 2023 expected to vest in 2026 will amount to approximately TCHF 76 (assuming 100% target achievement and full vesting of the PSUs).

(4)The total compensation awarded to members of the Management Board shown in this table does not include the items mentioned in the foregoing note (3).

For a discussion of our employment arrangements with our executive officers, see the section of this Annual Report on Form 20-F entitled “Related Party Transactions—Agreements with Our Directors and Executive Officers—Employment Arrangements.” Except for the arrangements described in the section of this Annual Report on Form 20-F entitled “Related Party Transactions—Agreements with Our Directors and Executive Officers—Employment Arrangements,” there are no arrangements or understanding between us and any of our other executive officers providing for benefits upon termination of their employment, other than as required by applicable law.

On November 14, 2023, in accordance with Rule 10D-1 promulgated under the Exchange Act and Nasdaq Listing Rule 5608, we adopted an incentive compensation recoupment policy which is filed herewith as Exhibit 97.1.

Under Swiss corporate law, an indemnification of a director or member of the executive management in relation to potential personal liability is not effective to the extent the director or member of the executive management intentionally or negligently violated his or her corporate duties towards the company (certain views advocate that at least a grossly negligent violation is required to exclude the indemnification). Most violations of corporate law are regarded as violations of duties towards the company rather than towards the shareholders. In addition, indemnification of controlling persons is not permitted under Swiss corporate law, including shareholders of the company.

Nevertheless, the articles of association of a Swiss corporation may set forth that the company shall indemnify and hold harmless to the extent permitted by the law, the directors and executive managers out of assets of the company against threatened, pending or completed actions. However, our articles of association do not provide for such an indemnification provision.

Within the same limitations, articles of association of a Swiss corporation may also provide that the directors shall be entitled to the reimbursement of all expenses incurred in the interests of the corporation. Our articles of association contain such a provision.

In addition, a corporation may enter into and pay for directors' and officers' liability insurance which typically covers negligent acts as well.

We extended liability insurance for our directors and officers, including insurance coverage for liability under the Securities Act. We believe that this insurance is necessary to attract qualified directors and executive officers.

We believe that our ability to grant incentive awards is a valuable and necessary compensation tool that allows us to attract and retain the best available personnel for positions of substantial responsibility, provides additional incentives to directors, executive officers, and employees and promotes the success of our business. Historically, we have granted several different equity incentive instruments to our directors, employees and other service providers, including:

•Restricted Share Units, or RSUs, granted to our directors;

•Performance Share Units, or PSUs, granted to our executive officers and employees; and

•share options granted to employees, directors and selected advisors.

Our articles of association authorize the board of directors to issue one or more participation plans and/or policies. An amendment or renewal of the relevant provision in our articles of association must be approved by an absolute majority of the votes represented at the general meeting of shareholders. Once our board of directors' authority is approved by our shareholders, the maximum aggregate amounts of the variable compensation elements actually granted to the directors and executive officers must be approved by an absolute majority of the votes represented at the general meeting of shareholders and shall continue for the duration of the current financial year. Compensation may be paid out prior to approval by the general meeting of shareholders subject to subsequent approval. If the general meeting of shareholders does not approve a proposal of the board of directors, the board of directors must newly determine the maximum aggregate amount or maximum partial amounts taking into account all relevant factors and submit such amounts for approval to the same general meeting of shareholders, to an extraordinary general meeting of shareholders or to the next ordinary general meeting of shareholders.

Prior to our initial public offering on SIX Swiss Exchange on November 5, 2014, which we refer to as our Swiss IPO, our board of directors established three share option plans: (i) the Employee Share Option Plan 2007, or ESOP 2007, (ii) the Employee Share Option Plan 2009, or ESOP 2009, and (iii) the Employee Share Option Plan 2014, or ESOP 2014, with similar features as the ESOP 2009, but no longer providing for accelerated vesting of options in the event of our Swiss IPO. Each option entitles its holder to purchase one of our shares at the pre-defined exercise price. The number of options granted to each participant was determined by the board of directors based on a participant’s position and level of responsibility. As a rule, the options vested quarterly over a four-year period. At the end of the option term, the unexercised options expire without value.

As of December 31, 2023, no options were outstanding under the ESOP 2007, and an aggregate of 282,105 options were outstanding under the ESOP 2009 and ESOP 2014, together. As of December 31, 2023, all of the outstanding options were fully vested.

Following our Swiss IPO in 2014, no further grants were made under any of the ESOP 2007, ESOP 2009 or ESOP 2014, and we do not intend to make any further grants under any of these plans in the future. For additional information, see Note 18 to our consolidated financial statements as of and for the year ended December 31, 2023 included elsewhere in this Annual Report on Form 20-F.

Under the LTI Plans, described in “—Long-Term Incentive Plans” below, members of our board of directors are eligible to be granted RSUs. RSUs are contingent rights to receive a certain number of our shares at the end of a three-year blocking period. RSUs vest over a one-year period from their date of grant, following the lapse of which they are no longer subject to forfeiture if a member of our board resigns. The number of shares to be received is not variable, i.e., the number of shares does not depend on the achievement of certain pre-defined performance metrics. In certain circumstances, including a change of control, a full or partial early vesting of the RSUs may occur.

As of December 31, 2023, 182,678 RSUs were outstanding.

Under the LTI Plans, described in “—Long-Term Incentive Plans” below, executive officers and employees are eligible to be granted PSUs. PSUs are contingent rights to receive a variable number of our shares either in aggregate at the end of a three-year cliff-vesting period or in annual installments over a three-year vesting period. The number of PSUs granted to a plan participant is calculated by dividing the CHF amount approved for the respective individual by the fair value of each PSU at the grant date based on the average share price in the two months preceding the grant date. While the PSUs are designed to allow the beneficiaries to participate in the long-term share price development, the number of shares to be earned in relation to a PSU depends on (i) the achievement of annual corporate goals for the respective year, (ii) the achievement of long-term value-driving milestones outside of such corporate goals during such year and (iii) the development of the share price of the Company. In accordance with these parameters, the number of shares to be issued based on the PSUs can be between zero and 150% of the number of PSUs granted. Even after the determination of goal achievement, participants may lose their entitlements in full or in part depending on certain conditions relating to their employment.

In certain circumstances, including a change of control, a full or partial accelerated vesting of the PSUs may occur.

As of December 31, 2023, 1,347,983 PSUs were outstanding.

Our long-term incentive plans established in March of 2015, March of 2016, March of 2017, March of 2018, March of 2019, March of 2020, March of 2021, March of 2022 and March of 2023, respectively, which we collectively refer to as the LTI Plans, are rolled out annually. This allows our board of directors to review and adjust the terms and targets of the LTI Plans on an annual basis. Employees generally receive the grants on April 1 of each calendar year. With respect to members of the Management Board, the annual grants are usually made on April 1 subject to approval of the ordinary shareholders’ meeting at which the necessary amounts for variable compensation are approved by the shareholders. With respect to members of our board of directors, the annual grants are made following the ordinary shareholders’ meeting, at which the necessary amounts for variable compensation are approved by the shareholders.

We currently have eight directors, four of whom are citizens or residents of the United States.

Our articles of association provide that our board of directors shall consist of a minimum of three members and maximum of eleven members. All directors (including the chairperson of the board of directors) are appointed to and removed from the board of directors exclusively by shareholders’ resolution for a maximum term of office of one year, extending until completion of the next annual shareholders' meeting. Directors may be re-elected at any time. In the event the office of the chairperson is vacant, the board of directors shall appoint a new chairperson from its members for the remaining term of office. The board of directors may elect a vice-chairperson from its members each year immediately following the annual shareholders' meeting for a term ending at the closing of the following annual shareholders' meeting. The board of directors shall further appoint the secretary, who need not be a member of the board of directors. The secretary shall be entitled to participate in the deliberations and discussions of the board of directors, but shall not vote, unless he or she is a member of the board of directors.

The following table sets forth the names of our directors, the year of their initial appointment as directors and the expiration dates of their current term:

(1)At the end of the general meeting of shareholders during the year in which their term office expires, in each case as indicated.

As a foreign private issuer, under Nasdaq rule 560(a)(2), we are not required to have independent directors on our board of directors, except to the extent that our audit committee is required to consist of independent directors, subject to certain phase-in schedules.

Nevertheless, our board of directors has undertaken a review of the independence of the directors and considered whether any director has a material relationship with us that could compromise his or her ability to exercise independent judgment in carrying out his or her responsibilities. Based upon information requested from, and provided by, each director concerning such director’s background, employment and affiliations, including family relationships, our board of directors determined that William M. Burns, Agnete Fredriksen, Dominik Höchli, Steven H. Holtzman, Sandip Kapadia, Vito J. Palombella and Michael Vasconcelles are “independent directors” as defined under applicable Nasdaq rules and the independence requirements contemplated by Rule 10A-3 under the Securities Exchange Act of 1933, as amended, or the Exchange Act. In making these determinations, our board of directors considered the current and prior relationships that each non-employee director has with us and all other facts and circumstances that our board of directors deemed relevant in determining the director’s independence, including the number of ordinary shares beneficially owned by the director and his or her affiliated entities (if any).

Our board of directors is primarily responsible for the oversight of our risk management activities and has delegated to the Audit and Finance Committee the responsibility to assist our board of directors in this task. The Audit and Finance Committee also monitors the issues relating to the preparation and supervision of accounting and financial information. The Audit and Finance Committee, among other things, monitors the effectiveness of the internal control and risk management systems with regard to the procedures relating to the preparation and processing of accounting and financial information, without undermining the independence of the board of directors. While our board of directors oversees our risk management, our management is responsible for day-to-day risk management processes. Our board of directors expects our management to consider risk and risk management in each business decision, to proactively develop and monitor risk management strategies and processes for day-to-day activities and to effectively implement risk management strategies adopted by the board of directors. We believe this division of responsibilities is the most effective approach for addressing the risks we face.

The Sarbanes-Oxley Act of 2002, as well as related rules subsequently implemented by the SEC, requires foreign private issuers, including our company, to comply with various corporate governance practices. In addition, Nasdaq rules provide that foreign private issuers may follow home country practice in lieu of the Nasdaq corporate governance standards, subject to certain exceptions and except to the extent that such exemptions would be contrary to U.S. federal securities laws. However, if the laws of a foreign private issuer’s home country require that any such matter be approved by the board of directors or the shareholders, the audit committee’s responsibilities or powers with respect to such matter may instead be advisory. Under Swiss law, the audit committee may only have an advisory role and appointment of our statutory auditors, in particular, must be decided by the shareholders at our annual meeting.

Because we are a foreign private issuer, our members of our board of directors, executive board members and senior management are not subject to short-swing profit and insider trading reporting obligations under Section 16 of the Exchange Act. They are, however, subject to the obligations to report changes in share ownership under Section 13 of the Exchange Act and related SEC rules.

On January 1, 2023, Swiss ordinance against excessive compensation in listed stock corporations, known as the “Say on Pay” rule, was incorporated in the Swiss Code of Obligations. Pursuant to Swiss corporate law, companies listed on the SIX Swiss Exchange are required to establish a compensation committee. Our board of directors has established an Audit and Finance Committee, a Nomination and Compensation Committee and a Research and Development Committee, which operate pursuant to our articles of association, the charter of the Audit and Finance Committee, the charter of the Nomination and Compensation Committee and the charter of the Research and Development Committee. The composition and functioning of all of our committees is designed to comply with all applicable requirements of Swiss law, the Exchange Act, Nasdaq and SEC rules and regulations.

Our Audit and Finance Committee assists our board of directors in its oversight of our corporate accounting and financial reporting by making an independent assessment of the quality of the external auditors, our financial statements and our internal controls. Sandip Kapadia, Dr. Dominik Höchli and Steven Holtzman currently serve on our Audit and Finance Committee. Mr. Kapadia is chairperson of our Audit and Finance Committee. Our board of directors has determined that each of Mr. Kapadia, Dr. Höchli and Mr. Holtzman is independent within the meaning of the applicable Nasdaq listing rules and the independence requirements contemplated by Rule 10A-3 under the Exchange Act. Our board of directors has further determined that Mr. Kapadia is an “audit committee financial expert” as defined by SEC rules and regulations and that each of the members of the Audit and Finance Committee qualifies as financially sophisticated under the applicable exchange listing rules. The principal duties and responsibilities of our Audit and Finance Committee include (1) analyzing economic and financial information and (2) ensuring the accuracy and honesty of our company’s financial statements, as well as the quality of the information provided.

Our board of directors has specifically assigned the following duties to the Audit and Finance Committee:

•assessing the quality and effectiveness of the external audit;

•assessing the quality of the internal control system, including risk management and the efficiency and state of compliance and monitoring with applicable norms within the Company;

•reviewing the stand-alone Swiss statutory and consolidated financial statements as well as all reporting prepared by the external auditor;

•deciding whether the year-end stand-alone Swiss statutory and consolidated financial statements be recommended to the board of directors for presentation to the general shareholders’ meeting;

•assessing the performance and the fees charged by the external auditors and ascertain their independence;

•annually review written disclosures from the external auditors delineating all relationships between the external auditors and the Company and take appropriate action to oversee the independence of the external auditors;

•reviewing the scope of the prospective external audit, the estimated fees thereof and any other matters pertaining to such audit;

•approve the annual engagement letter of external auditor, including the scope of the audit and the fees and terms for the planned audit

•pre-approve all audit review or attest services and permitted non-audit services by the external auditors

•taking notice of all comments from the external auditors on accounting procedures and systems of control;

•reviewing with the external auditors and/or the SVP Finance as principal financial officer / CEO any questions, comments or suggestions they may have regarding the internal control, risk management, accounting practices and procedures of the Company and its subsidiaries;

•discussing with the management any legal matters that may have a material impact on the Company's financial statements and any material reports or inquiries from regulatory or governmental agencies which could materially impact the Company's contingent liabilities and risks;

•reviewing with management and the external auditors, as appropriate, the Company’s MD&A disclosures;

•annually reviewing and discussing with management the management’s report in relation to internal controls over financial reporting pursuant to the Sarbanes-Oxley Act of 2002;

•reviewing and approving in advance any transaction that could be within the scope of a related party transaction;

•establishing procedures for the receipt, retention and treatment of complaints received by the Company regarding accounting, internal accounting controls or auditing matters and the confidential and anonymous submission by employees of concerns regarding questionable accounting or auditing matters;

•supporting the board of directors with regard to the financial planning as well as the principles of accounting and financial control;

•evaluating management’s principles and proposals for, and formulate recommendations to the board of directors in regard to financial planning (capital structure, management of resources, inter-company financing), dividend policy and capital market relations;

•reviewing proposed concepts of financial objectives such as costs of capital, enhancement of shareholders’ value, Company objectives, project objectives (capital expenditures and M&A); and

•reviewing finance policy and operations in treasury, controlling, insurance, taxes and investment and acquisitions.

Our Nomination and Compensation Committee assists our board of directors in establishing and reviewing the compensation strategy and guidelines as well as in preparing the compensation plans and proposals to the general meeting of shareholders regarding the compensation of the board of directors and executive officers. William M. Burns, Steven H. Holtzman and Dr. Michael Vasconcelles currently serve on the Nomination and Compensation Committee. Mr. Burns is the chairperson of our Nomination and Compensation Committee. We are subject to the Swiss Code of Obligations rules against excessive compensation in listed stock corporations, known as the “Say on Pay” rule. As a result of the Say on Pay rule, the members of the Nomination and Compensation Committee must be elected by our shareholders and the aggregate compensation of our board of directors and executive officers must also be approved by our shareholders.

The principal duties and responsibilities of our Nomination and Compensation Committee include:

•reviewing and making recommendations regarding the compensation strategy and guidelines of the Company;

•reviewing and making recommendations regarding the compensation of the members of the board of directors and the executive management;

•reviewing and making recommendations regarding compensation plans (cash and/or equity-based plans), and where appropriate or required, make recommendations to adopt, amend and terminate such plans;

•administering the compensation plans;

•reviewing and making recommendations regarding any employment agreements (including any benefits) for members of the executive management;

•reviewing and making recommendations regarding the proposals of the board of directors for the aggregate amount of the compensation of the board of directors and of the executive management to be submitted to the annual general shareholders' meeting for approval;

•ensuring that any reporting obligation with respect to compensation matters, specifically any necessary disclosures in the annual report and/or compensation report, are met;

•reviewing considerations relating to the composition of the board of directors, including the size and the criteria for membership on the board of directors;

•evaluating candidates to the board of directors and making recommendations to the board of directors in this respect; and

•evaluating candidates to the Management Board and making recommendations to the board of directors in this respect.

The Research and Development Committee (i) provides strategic advice and brings recommendations to the Management Board and the board of directors regarding current and planned research and development programs, (ii) provides strategic advice to the board of directors regarding emerging science and technology issues and trends, and (iii) conducts a review of the effectiveness and competitiveness of our research and development function. Dr. Michael Vasconcelles, Dr. Agnete Fredriksen, Dr. Vito J. Palombella and Dr. Dominik Höchli currently serve on the Research and Development Committee. Dr. Vasconcelles is the chairperson of the Research and Development Committee.

As of December 31, 2023, we had 167.5 full-time equivalent employees (December 31, 2022: 175.3 full-time equivalents). None of our employees are represented by collective bargaining agreements. We believe that we maintain good relations with our employees. At each date shown, we had the following number of full time employees, broken out by department. The majority of our employees are based in Zurich, Switzerland. Three of our employees are based in the United States of America.

The following table shows the number of ordinary shares, options, RSUs and PSUs held by the individual members of the board of directors and the Management Board, as of December 31, 2023. For more information regarding the share ownership of our directors and executive officers, see "Item 6.B - Compensation" and "Item 7.A - Major shareholders."

The following table and accompanying footnotes set forth, as of December 31, 2023, information regarding beneficial ownership of our ordinary shares by:

•each person, or group of affiliated persons, known by us to beneficially own more than 3% of our ordinary shares;

•each of our executive officers;

•each of our directors; and

•all of our executive officers and directors as a group.

Beneficial ownership is determined according to the rules of the SEC and generally means that a person has beneficial ownership of a security if he, she or it possesses sole or shared voting power or investment power with respect to that security, including ordinary shares that vest within 60 days of December 31, 2023 and options and warrants that are currently exercisable or exercisable within 60 days of December 31, 2023. Shares issuable under PSUs or RSUs that vest within 60 days of December 31, 2023 and shares subject to options currently exercisable or exercisable within 60 days of December 31, 2023 are deemed to be outstanding for computing the percentage ownership of the person holding these free shares, options and the percentage ownership of any group of which the holder is a member, but are not deemed outstanding for computing the percentage of any other person.

Except as indicated in the footnotes below, we believe, based on the information furnished or otherwise known to us, that the persons named in the table below have sole voting and investment power with respect to all shares shown that they beneficially own, subject to community property laws where applicable. The information does not necessarily indicate beneficial ownership for any other purpose, including for purposes of Sections 13(d) and 13(g) of the Securities Act or applicable Swiss law.

Our calculation of the percentage of beneficial ownership is based on 36,044,706 of our ordinary shares registered with the commercial register of the canton of Zurich as of December 31, 2023 and includes 3,500,000 treasury shares indirectly held through our wholly-owned subsidiary Molecular Partners Inc.

Except as otherwise indicated in the following table, addresses of the directors, executive officers and named beneficial owners are in care of Molecular Partners AG, Wagistrasse 14, 8952 Schlieren, Switzerland.

(1)Number of voting rights carried by shares as reported by our shareholders in notifications filed with SIX Swiss Exchange.

(2)The information reported is in part derived from reports filed with the SEC pursuant to the Exchange Act.

(3)Based on a Schedule 13D filed with the SEC on November 20, 2023, the shares provided in the table above consist of 443,221 ADSs and 8,696,205 ordinary shares of the Company held by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS, L.P. ("Trading Fund OS") and a managed account for BVF Partners L.P. (the "Partners Managed Account," and collectively, the "BVF Funds"). BVF GP LLC is the general partner of BVF and may be deemed to beneficially own the shares beneficially owned by BVF. BVF II GP LLC is the general partner of BVF2 and may be deemed to beneficially own the shares beneficially owned by BVF2. BVF Partners OS Ltd. is the general partner of Trading Fund OS and may be deemed to beneficially own the shares beneficially owned by Trading Fund OS. BVF GP Holdings LLC, as the sole member of BVF GP LLC and BVF II GP LLC, may be deemed to beneficially own the shares beneficially owned by BVF and BVF2. BVF Partners L.P. ("Partners"), as the investment manager of BVF, BVF2 and Trading Fund OS, and the sole member of BVF Partners OS Ltd, may be deemed to beneficially own the shares held by BVF, BVF2, Trading Fund OS and the Partners Managed Account. BVF Inc., as the general partner of Partners, may be deemed to beneficially own the shares beneficially owned by Partners. Mark Lampert, as a director and officer of BVF Inc., may be deemed to beneficially own the shares beneficially owned by BVF Inc. Each of Partners, BVF Inc. and Mark Lampert disclaims beneficial ownership of the shares beneficially owned by BVF, BVF2, Trading Fund OS, and the Partners Managed Account. The address for the BVF Funds is 44 Montgomery St., 40th Floor, San Francisco, California 94104. According to a Schedule 13D filed with the SEC on November 20, 2023, Mark N. Lampert (Biotechnology Value Funds) held 8,696,205 shares (corresponding to 23.9% of voting rights), consisting of 443,221 ADSs and 8,696,205 ordinary shares.

(4)Includes 400,000 ADSs purchased in the Company's initial public offering of ADSs in the U.S. Shares of the Company are held by Suvretta Master Fund, Ltd., Averill Master Fund, Ltd., Vitruvius US Equity and Suvretta Long Master Fund, Ltd. Suvretta Capital Management, LLC is the beneficial owner and may exercise voting power over the shares. Aaron Cowen may also be deemed to have shared dispositive power and voting power with respect to the shares by virtue of his role at Suvretta Capital Management, LLC. The address for Suvretta Capital Management, LLC is 540 Madison Avenue, 7th Floor, New York, New York 10022.

(5)Shares of the Company are held by Novartis Pharma AG. Novartis Pharma AG is a direct wholly-owned subsidiary of Novartis AG, which is the beneficial owner and may exercise voting power over the shares. The address of Novartis AG is Lichtstrasse 35, 4056 Basel, Switzerland.

(6)Shares of the Company are held by UBS Fund Management (Switzerland) AG. UBS Fund Management (Switzerland) AG is a direct wholly-owned subsidiary of UBS Group AG, which is the beneficial owner and may exercise voting power over the shares.

(7)Consists of 735,095 ordinary shares and 70,080 ordinary shares issuable upon exercise of options that are exercisable within 60 days of December 31, 2023.

(8)Consists of 767,524 ordinary shares and 36,070 ordinary shares issuable upon exercise of options that are exercisable within 60 days of December 31, 2023.

(9)Consists of 26,951 ordinary shares.

(10)Consists of 14,717 ordinary shares and 20,000 ordinary shares issuable upon exercise of options that are exercisable within 60 days of December 31, 2023.

(11)Consists of 23,006 ordinary shares.

(12)Consists of 29,168 ordinary shares.

(13)Consists of 25,706 ordinary shares and 13,040 ordinary shares issuable upon exercise of options that are exercisable within 60 days of December 31, 2023.

(14)Consists of 1,632,686 ordinary shares and 139,190 ordinary shares issuable upon exercise of options that are exercisable within 60 days of December 31, 2023.

In June 2021, we completed our initial public offering in the U.S. and listed our ADSs on the Nasdaq Global Select Market. In the initial public offering, we issued and sold 3,000,000 ADSs representing 3,000,000 ordinary shares.

To our knowledge, other than as provided in the table above, our other filings with the SEC and this Annual Report on Form 20-F, the significant changes in the percentage ownership held by our principal shareholders since January 1, 2019 are as a result of the transactions described in the final prospectus related to our initial public offering dated June 15, 2021, filed with the SEC on June 16, 2021 pursuant to Rule 424(b), under the heading “Related Party Transactions-Agreements with Shareholders” and the dilution resulting from our initial public offering of ADSs in the U.S.

As of December 31, 2023, our issued share capital as recorded in the commercial register of the Canton of Zurich was CHF 3,604,470.60, consisting of 36,044,706 ordinary shares with a nominal value of CHF 0.10 each. All shares rank pari passu with each other and no preferred shares exist.

As of December 31, 2023, to the best of our knowledge and assuming that all of our ordinary shares represented by ADSs are held by residents of the United States, we estimate that 30% of our issued ordinary shares (including ordinary shares underlying ADSs) as identified in publicly available filings were held in the United States by approximately 5 holders of record. The actual number of holders is potentially greater than these numbers of record holders, and includes beneficial owners whose ordinary shares or ADSs are held in street name by brokers and other nominees. This number of holders of record also does not include holders whose shares may be held in trust by other entities.

Since January 1, 2023, we have engaged in the following transactions with our directors, executive officers and holders of more than 3% of our outstanding voting securities and their affiliates, which we refer to as our related parties.