CytoSorbents Reports Third Quarter 2025 Financial Results and Provides Business Update

PRINCETON, N.J., November 13, 2025 — CytoSorbents Corporation (NASDAQ: CTSO), a leader in the treatment of life-threatening conditions in the intensive care unit and cardiac surgery using blood purification, today reported financial results for the third quarter ended September 30, 2025, and recent business highlights.

Third Quarter 2025 Financial Results

“We are pleased with our third quarter results led by record sales in our distributor territories, strong sales in our other direct markets, and improved operating margins and cash efficiencies across the company,” stated Dr. Phillip Chan, Chief Executive Officer of CytoSorbents. “This strong sales growth was partially offset by a decline in our direct German market where we continue our proactive reorganization of our commercial team and selling approach which we believe will lead to improved performance and execution in 2026.”

Workforce and Cost Reduction Program Expected to Accelerate Q1 2026 Cash Flow Breakeven

Today, the Company announced the implementation of a strategic Workforce and Cost reduction plan to further reduce costs, optimize operations, and accelerate the path to cash-flow profitability. This initiative follows a comprehensive internal review of its cost structure and operating model. As part of the strategic plan, CytoSorbents reduced its workforce by approximately 10%, reduced and realigned production and operating expenses, and now expects to reach operating cash flow break-even in the first quarter of 2026.  The Company expects to record a charge of up to $900,000 that will include severance and other charges related to the restructuring.  The estimated costs that the Company expects to incur, and the timing thereof, are subject to a number of assumptions, and actual amounts may differ materially.

Amended Credit Agreement Strengthens Balance Sheet and Extends Interest-only Period

Today, the Company announced that it has amended its prior credit agreement with Avenue Capital Group effective November 13, 2025.  The amendment provides immediate funding of an additional $2.5 million in term loan capital and an extension of the interest-only period to December 31, 2026 (from July 1, 2026), followed by equal monthly installments of principal plus accrued and unpaid interest until maturity on July 1, 2027.  The Amendment requires that the Company maintain certain operating cash burn targets only until U.S. FDA marketing approval of DrugSorb-ATR is achieved. The Company will have access to an additional $2.5 million in term loan capital with a further six-month extension of the interest-only period to the July 1, 2027 maturity date upon the U.S. FDA approval of DrugSorb-ATR in 2026.  Under the terms of the amendment, the Company issued additional warrants to Avenue Capital Group to purchase 1,428,571 shares of the Company’s common stock for cash at the exercise price of $0.70, which expire on November 13, 2030. The number of warrants and exercise price are fixed.

DrugSorb™-ATR Regulatory Updates

On September 16, 2025, the Company announced plans to submit a new De Novo application for DrugSorb-ATR to the U.S. FDA.  This decision followed an FDA appeal meeting and final determination that upheld the prior denial of the original application.  Notably, the FDA raised no concerns regarding device safety but requested additional information to support the Company’s desired label indication.

The new De Novo submission will include analyses of real-world data demonstrating DrugSorb-ATR’s effectiveness in clinical practice - data that were not available at the time of the original filing and therefore not eligible for inclusion in the prior review.  The Company believes these new data underscore DrugSorb-ATR’s strong clinical performance and reinforce its favorable benefit-to-risk profile, particularly when combined with the comprehensive clinical evidence previously submitted.

To advance this process, the Company submitted a pre-submission meeting request with supporting documentation to the FDA on November 7, 2025.  A formal meeting with the Agency is expected in late Q4 2025 or early 2026 to confirm the requirements for the new application, followed by the formal De Novo submission in Q1 2026.  A regulatory decision is anticipated by mid-2026, following the typical 150-day review period.  Based on discussions with the FDA, the review is expected to focus solely on the remaining open items from the initial submission and may be expedited under the device’s FDA Breakthrough Device Designation, which allows for priority and interactive review.

Dr. Chan continued, “We are pleased with the progress we are making on key strategic initiatives including strong sales in our existing core business, gross margins of over 70%, progress toward DrugSorb-ATR approval and launch in the US, and the expectation to bring the Company to cash flow breakeven in the first quarter.  This progress is further supported by the amendment of our credit agreement which we believe provides sufficient liquidity and flexibility to continue supporting our strategic growth initiatives.  We appreciate the partnership with our lender – Avenue Capital Group – and look forward to continuing to execute our strategy.”

“We are happy to restructure the existing loan facility and provide more capital to CytoSorbents. We have been very impressed with their OUS revenue growth and how they have been impacting patients’ lives and want to be strong capital partners," stated Chad Norman, Sr. Portfolio Manager, Avenue Capital Group.

A Wealth of New Clinical Data

Meanwhile, recent clinical data publications and presentations continue to reinforce the positive clinical impacts our therapies are having around the world.  Select recent examples include:

Dr. Chan concluded, “With a rapidly expanding foundation of clinical evidence that now encompasses hundreds of peer-reviewed publications, real-world data, and compelling success stories, CytoSorbents’ broad-spectrum blood purification technology continues to advance as a powerful tool for removing harmful substances and redefine how some of the most complex and life-threatening conditions are treated. We were especially pleased with the strong response to our World Sepsis Day Global Webinar on September 10th, which underscored the critical and

evolving role of early, intensive use of CytoSorb® alongside traditional antibiotic therapy in managing sepsis and septic shock. Looking ahead, we remain committed to expanding our clinical programs across all applications to further improve outcomes for patients, and to support the healthcare workers around the world who care for them.”

Third Quarter 2025 Earnings Conference Call

CytoSorbents’ management will host a live conference call, presentation webcast, and a question-and-answer session with the following information:

It is recommended that participants join approximately 10 minutes prior to the start of the call.

An archived recording of the conference call will be available under the Investor Relations section of the Company’s website at https://ir.cytosorbents.com/

About Non-GAAP Financial Measures

To supplement our condensed consolidated financial statements, we use the non-GAAP financial measures of EBITDA, which measures earnings before interest, income taxes, depreciation and amortization, and Adjusted EBITDA which further excludes non-cash stock compensation expense, and gain or loss of foreign exchange translation. We also use the non-GAAP financial measures of Adjusted Net Income or Loss and Adjusted Net Income or Loss Per Share which excludes non-cash stock compensation expense and gain or loss of foreign exchange translation from Net Loss and Net Loss Per Share, respectively. These non-GAAP measures are not based on any comprehensive set of accounting rules or principles and should not be considered a substitute for, or superior to, financial measures calculated in accordance with GAAP and may be different from non-GAAP measures used by other companies. In addition, these non-GAAP measures should be read in conjunction with our financial statements prepared in accordance with GAAP. The reconciliations of the non-GAAP measures to the most directly comparable financial measures calculated and presented in accordance with GAAP should be carefully evaluated. We use these non-GAAP financial measures for financial and operational decision-making and as a means to evaluate period-to-period comparisons. We believe that these non-GAAP financial measures provide meaningful supplemental information regarding our performance and that both management and investors benefit from referring to these non-GAAP financial measures in assessing our performance and when planning, forecasting, and analyzing future periods. We believe these non-GAAP financial measures are useful to investors because

(1) they allow for greater transparency with respect to key metrics used by management in its financial and operational decision-making and (2) they are used by investors and the analyst community to help them analyze the performance of our business, the Company’s cash available for operations, and the Company’s ability to meet future capital expenditure and working capital requirements.  For a reconciliation of non-GAAP financial measures to the most comparable GAAP measure, see the reconciliation included in the financial tables.  All non-GAAP adjustments are presented pre-tax.

About CytoSorbents Corporation (NASDAQ: CTSO)

CytoSorbents’ lead product, CytoSorb®, is approved in the European Union and distributed in over 70 countries worldwide, with nearly 300,000 devices used cumulatively to date.  CytoSorb was originally launched in the European Union under CE mark as the first cytokine adsorber.  Additional CE mark extensions were granted for bilirubin and myoglobin removal in clinical conditions such as liver disease and trauma, respectively, and for ticagrelor and rivaroxaban removal in cardiothoracic surgery procedures. CytoSorb has also received FDA Emergency Use Authorization in the United States for use in adult critically ill COVID-19 patients with impending or confirmed respiratory failure.  CytoSorb is not yet approved or cleared in the United States.

In the U.S. and Canada, CytoSorbents is developing the DrugSorb™-ATR antithrombotic removal system, an investigational device based on an equivalent polymer technology to CytoSorb, to reduce the severity of perioperative bleeding in high-risk surgery due to blood thinning drugs.  It has received two FDA Breakthrough Device Designations:  one for the removal of ticagrelor and another for the removal of the direct oral anticoagulants (DOAC) apixaban and rivaroxaban in a cardiopulmonary bypass circuit during urgent cardiothoracic surgery.  The Company is actively pursuing regulatory approval of DrugSorb-ATR with the U.S. FDA and will pursue regulatory approval with Health Canada with better visibility from the FDA.  DrugSorb-ATR is not yet granted or approved in either the U.S. or Canada.

The Company has numerous marketed products and products under development based upon this unique blood purification technology protected by many issued U.S. and international patents and registered trademarks, and multiple patent applications pending, including ECOS-300CY®, CytoSorb-XL™, HemoDefend-RBC™, HemoDefend-BGA™, VetResQ®, K+ontrol™, DrugSorb™, ContrastSorb, and others. For more information, please visit the Company’s website at https://ir.cytosorbents.com/  and follow us on Facebook and X and LinkedIn.

Forward-Looking Statements

This press release includes forward-looking statements intended to qualify for the safe harbor from liability established by the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, but are not limited to, statements about our plans, objectives, future targets and outlooks for our business, representations and contentions, and the outcome of our regulatory submissions, and are not historical facts and typically are identified by use of terms such as “may,” “should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “continue” and similar words, although some forward-looking statements are expressed differently. You should be aware that the forward-looking statements in this press release represent management’s current judgment and expectations, but our actual results, events and performance could differ materially from those in the forward-looking statements. Factors which could cause or contribute to such differences include, but are not limited to, our restructuring of our direct sales team and strategy in Germany, ability to successfully obtain U.S. FDA and Health Canada marketing authorization or approval, our ability to complete our strategic workforce and cost reduction plan to reduce costs, optimize operations, and achieve cash-flow break-even in the first quarter of 2026, our ability to appropriately finance the Company, and the risks discussed in our Annual Report on Form 10-K, filed with the SEC on March 31, 2025, as updated by the risks reported in our Quarterly Reports on Form 10-Q, and in the press releases and other communications to shareholders issued by us from time to time which attempt to advise interested parties of the risks and factors which may affect our business. We caution you not to place undue reliance upon any such forward-looking statements. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of

new information, future events, or otherwise, other than as required under the Federal securities laws.

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305 College Road East

Princeton, NJ 08540

Investor Relations Contact:

Aman Patel, CFA & Adanna G. Alexander, PhD

ICR Healthcare

PART I — FINANCIAL INFORMATION

See accompanying notes to condensed consolidated financial statements

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED)

(in thousands, except share and per share data)

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (UNAUDITED)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(in thousands)

Reconciliation of GAAP Financial Measures to Non-GAAP Financial Measures