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(MARK ONE)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended September 30, 2024

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________ to __________

Commission File Number 001-31921

(913) 344-9200

Securities registered pursuant to Section 12(b) of the Act:

As of March 31, 2024, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was $538,071,743, based on the closing sale price of $15.74 per share, as reported on the New York Stock Exchange.

The number of shares outstanding of the registrant’s $0.01 par value common stock at December 11, 2024 was 41,452,793 shares.

 

Certain statements in this Form 10-K, including without limitation our or management’s beliefs, expectations or opinions; statements regarding future events or future financial performance; our plans, objectives and strategies; our outlook, including expected sales volumes and costs; the useful life of our mine properties; conversion of mineral resources into mineral reserves; existing or potential capital expenditures, capital projects and investments; the industry and our competition; projected sources of cash flow; potential legal liability; proposed or recently enacted legislation and regulatory action; the seasonal distribution of working capital requirements; our reinvestment of foreign earnings outside the United States (“U.S.”); repatriation of foreign earnings to the U.S.; payment of future dividends and ability to reinvest in our business; our ability to optimize cash accessibility and minimize tax expense; our debt service requirements; our liquidity needs; realization of potential savings from our restructuring activities; funding obligations for our United Kingdom (“U.K.”) pension plan; outcomes of matters with taxing authorities; the seasonality of our business; the effects of climate change on us; and our ability to successfully remediate the material weaknesses in our internal control over financial reporting disclosed in this Form 10-K, are forward-looking statements. Forward-looking statements are those that predict or describe future events or trends and that do not relate solely to historical matters. We use words such as “may,” “would,” “could,” “should,” “will,” “likely,” “expect,” “anticipate,” “believe,” “intend,” “plan,” “forecast,” “outlook,” “project,” “estimate” and similar expressions suggesting future outcomes or events to identify forward-looking statements or forward-looking information. These statements are based on our current expectations and involve risks and uncertainties that could cause our actual results to differ materially. In evaluating these statements, you should carefully consider various risks, uncertainties and factors including, but not limited to, those listed under “Risk Factors” and elsewhere in this report. Forward-looking statements are only predictions and are subject to certain risks and uncertainties that may cause our actual results to differ materially from the forward-looking statements expressed or implied in this report as a result of factors, risks, and uncertainties, over many of which we do not have control.

Although we believe that the expectations reflected in the forward-looking statements are reasonable as of the date of this report, we cannot guarantee future results, levels of activity, performance or achievements. We do not undertake, and hereby disclaim any obligation or duty, unless otherwise required to do so by applicable laws, to update any forward-looking statement after the date of this report regardless of any new information, future events or other factors. The inclusion of any statement in this report does not constitute our admission that the events or circumstances described in such statement are material to us.

Factors that could cause actual results, levels of activity, performance, or achievements to differ materially from those expressed or implied by the forward-looking statements include, but are not limited to, the following:

•risks related to our mining and industrial operations;

•geological conditions;

•weather conditions;

•our continued ability to access ambient lake brine in the Great Salt Lake;

•dependency on a limited number of key production and distribution facilities and critical equipment;

•the inability to fund necessary capital expenditures or successfully complete capital projects;

•uncertainties in estimating our economically recoverable reserves and resources;

•the useful life of our mine properties;

•conversion of mineral resources into mineral reserves;

•strikes, other forms of work stoppage or slowdown or other union activities;

•supply constraints or price increases for energy and raw materials used in our production processes;

•our indebtedness and inability to pay our indebtedness;

•restrictions in our debt agreements that may limit our ability to operate our business or require accelerated debt payments;

•tax liabilities;

•the inability of our customers to access credit or a default by our customers of trade credit extended by us;

•financial assurance requirements;

•our payment of any dividends;

•the seasonal demand for our products;

•the impact of anticipated changes in potash product prices and customer application rates;

•the impact of competition on the sales of our products;

•inflation risks;

•increasing costs or a lack of availability of transportation services;

•risks associated with our international operations and sales, including changes in currency exchange rates;

•conditions in the sectors where we sell products and supply and demand imbalances for competing products;

•our rights and governmental authorizations to mine and operate our properties;

•risks related to unanticipated litigation or investigations or pending litigation or investigations or other contingencies;

•compliance with environmental, health and safety laws and regulations;

•environmental liabilities;

•compliance with foreign and U.S. laws and regulations related to import and export requirements and anti-corruption laws;

•changes in laws, industry standards and regulatory requirements;

•product liability claims and product recalls;

•misappropriation or infringement claims relating to intellectual property;

•inability to obtain required product registrations or increased regulatory requirements;

•our ability to successfully implement our strategies;

•risks related to labor shortages and the loss of key personnel;

•a compromise of our computer systems, information technology or operations technology or the inability to protect confidential or proprietary data;

•climate change and related laws and regulations;

•our ability to expand our business through acquisitions and investments, realize anticipated benefits from acquisitions and investments and integrate acquired businesses;

•outbreaks of contagious disease or similar public health threats;

•domestic and international general business and economic conditions;

•our ability to successfully remediate the material weaknesses in internal control over financial reporting disclosed in this Form 10-K; and

•other risk factors included in this report or reported from time to time in our filings with the Securities and Exchange Commission (the “SEC”). See “Where You Can Find More Information.”

This report includes market share and industry data and forecasts that we obtained from publicly available information and industry publications, surveys, market research, internal company surveys and consultant surveys. Industry publications and surveys, consultant surveys and forecasts generally state that the information contained therein has been obtained from sources believed to be reliable, but there can be no assurance as to the accuracy and completeness of such information. We have not independently verified any of the data from third-party sources nor have we ascertained the underlying economic assumptions relied upon therein. Similarly, internal company surveys, industry forecasts and market research, which we believe to be reliable based upon management’s knowledge of the industry, have not been verified by any independent sources. Except where otherwise noted, references to North America include only the continental U.S. and Canada, references to the U.K., include only England, Scotland and Wales, and statements as to our position relative to our competitors or as to market share refer to the most recent available data. Statements concerning (a) North American consumer and industrial salt and highway deicing salt markets are generally based on historical sales volumes, (b) U.K. highway deicing salt sales are generally based on historical sales volumes, and (c) sulfate of potash are generally based on historical sales volumes. Except where otherwise noted, all references to tons refer to “short tons” and all amounts are in U.S. dollars. One short ton equals 2,000 pounds and one metric ton equals 2,204.6 pounds.

We file annual, quarterly and current reports and other information with the SEC and our SEC filings are available at the SEC’s website at www.sec.gov. Copies of these documents are also available on our website, www.compassminerals.com. We also use our website as a tool to disclose important information about the company and comply with our disclosure obligations under Regulation Fair Disclosure. The information on our website (or any webpages referenced in this Form 10-K) is not part of this or any other report we file with, or furnish to, the SEC. Further, our references to website URLs are intended to be inactive textual references only.

You may also request a copy of any of our filings, at no cost, by writing or telephoning:

Investor Relations

Compass Minerals International, Inc.

Overland Park, Kansas 66210

 

For general inquiries concerning us, please call (913) 344-9200.

Unless the context requires otherwise, references in this report to the “Company,” “Compass Minerals,” “CMP,” “we,” “us” and “our” refer to Compass Minerals International, Inc. (“CMI,” the parent holding company) and its consolidated subsidiaries collectively.

Compass Minerals is a leading provider of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. Our salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial, chemical and agricultural applications. Our plant nutrition products help improve the quality and yield of crops, while supporting sustainable agriculture. We are also working to develop long-term fire-retardant solutions to help combat wildfires. As of September 30, 2024, we operate 12 production and packaging facilities with nearly 1,900 employees throughout the U.S., Canada and the U.K., including:

•The largest underground rock salt mine in the world in Goderich, Ontario, Canada;

•The largest dedicated rock salt mine in the U.K. in Winsford, Cheshire;

•A solar evaporation facility located near Ogden, Utah, which is both the largest sulfate of potash specialty fertilizer (“SOP”) production site and the largest solar salt production site in the Western Hemisphere; and

•Several mechanical evaporation facilities producing consumer and industrial salt.

See Item 2, “Properties,” for a discussion of our mining properties, including processing methods, facilities, production and summaries of our mineral resources and reserves, both in the aggregate and for our individual material mining properties.

Our Salt segment provides highway deicing salt to customers in North America and the U.K. as well as consumer deicing and water conditioning products, ingredients used in consumer and commercial food preparation and other salt-based products for consumer, industrial, chemical and agricultural applications in North America. In the U.K., we operate a records management business utilizing excavated areas of our Winsford salt mine with one other location in London, England.

Our Plant Nutrition segment produces and markets SOP products in various grades domestically and internationally to distributors and retailers of crop inputs, as well as growers and for industrial uses. We market our SOP under the trade name Protassium+®. 

In May 2023, we completed the purchase of Fortress North America, LLC (“Fortress”), a fire retardant company working to develop long-term fire retardant solutions to help combat wildfires (see Part II, Item 8, Note 3 of our Consolidated Financial Statements).

We sell our salt, plant nutrition and fire retardant products primarily in the U.S., Canada and the U.K. See Part II, Item 8, Note 14 to our Consolidated Financial Statements for financial information relating to our operations by geographic areas.

On February 16, 2021, we announced our plan to restructure our former Plant Nutrition South America segment to enable targeted and separate sales processes for each portion of the former segment, including our chemicals and specialty plant nutrition businesses along with our equity method investment in Fermavi Eletroquímica Ltda. (“Fermavi”). On March 16, 2021, our Board of Directors approved a plan to sell our South America chemicals and specialty plant nutrition businesses, our investment in Fermavi and our North America micronutrient product business (collectively, the “Specialty Businesses”) as described further in Part II, Item 8, Note 1 and Note 4 to our Consolidated Financial Statements. Consequently, the Specialty Businesses qualified for presentation as discontinued operations in accordance with U.S. generally accepted accounting principles (“GAAP”). Accordingly, the Specialty Businesses’ results of operations are presented as discontinued operations in the Consolidated Statements of Operations for the fiscal year ended September 30, 2022. As a result, we are presenting two reportable segments in continuing operations, Salt and Plant Nutrition in this Form 10-K. See Part II, Item 8, Note 14 to our Consolidated Financial Statements for more information.

Salt is indispensable and enormously versatile with thousands of reported uses. In addition, there are no known cost-effective alternatives for most high-volume uses. Through the use of effective mining techniques and efficient production processes, we leverage our high-grade salt deposits, which are among the most extensive in the world. Further, many of our Salt segment assets are in locations that are logistically favorable to our core markets. Our strategy for this segment is to focus on driving profitability from every ton we produce through cost efficiency as well as commercial and operational execution.

Through our Salt segment, we produce, market and sell salt (sodium chloride) and magnesium chloride in North America and sodium chloride in the U.K. Our Salt products include rock salt, mechanically-evaporated salt, solar-evaporated salt, brine magnesium chloride and flake magnesium chloride. We also purchase potassium chloride (“KCl”) and calcium chloride to sell as finished products or to blend with sodium chloride to produce specialty products. Sodium chloride represents the vast

majority of the products we produce, market and sell. In fiscal 2024, the Salt segment accounted for approximately 81% of our sales (see Part II, Item 8, Note 14 to our Consolidated Financial Statements for segment financial information).

Salt segment sales as a percentage of total sales from continuing operations for the fiscal years ended September 30, 2024, 2023 and 2022, are as follows:

Our Salt segment products are used in a wide variety of applications, including as a deicer for roadways, consumer and professional use, as an ingredient in chemical production, for water treatment, human and animal nutrition and for a variety of other consumer and industrial uses.

Historical demand for salt has remained relatively stable during periods of rising prices and through a variety of economic cycles due to its relatively low cost and diverse number of end uses. As a result, our cash flows from our Salt segment are not materially impacted by economic cycles. However, demand for deicing salt products is primarily affected by the number and intensity of snow events and temperatures in our service territories.

In our primary markets, we estimate that the consumption of highway deicing rock salt in North America, including rock salt used in chemical manufacturing processes, is approximately 39 million tons per year, assuming average winter weather conditions, while the consumer and industrial market is approximately 10 million tons per year. In the U.K., we estimate that the consumption of highway deicing salt is approximately 2 million tons per year, assuming average winter weather conditions. We also estimate that salt consumption in the U.S. has increased at a long-term historical average rate of flat to approximately 1% per year, although there have been recent fluctuations above and below this average driven primarily by winter weather variability.

Salt prices vary according to purity, end use and variations in refining and packaging processes. Management estimates that salt prices in the U.S. have increased at a long-term historical average rate of approximately 3% to 4% per year, although there have been recent fluctuations above and below this average. Due to salt’s relatively low production cost, transportation and handling costs tend to be a significant component of the total delivered cost, which makes logistics management and customer service key competitive factors in the industry. The high relative cost associated with transportation of salt tends to favor producers located nearest to customers.

We sell our Salt segment products through our highway deicing product line (which includes brine magnesium chloride as well as rock salt treated with this mineral) and our consumer and industrial product line (which includes salt as well as products containing magnesium chloride and calcium chloride in both pure form and blended with salt).

Highway deicing, including salt sold to chemical customers, constituted 60% of our fiscal 2024 Salt segment sales. Our principal customers are states, provinces, counties, municipalities and road maintenance contractors that purchase bulk deicing salt, both treated and untreated, for ice control on public roadways. Highway deicing salt in North America is sold primarily through an annual tendered bid contract process with governmental entities, as well as through multi-year contracts, with price, product quality and delivery capabilities as the primary competitive market factors. Some sales also occur through negotiated sales contracts with customers, particularly in the U.K. Since transportation costs are a relatively large portion of the delivered cost of our products to customers, locations of salt sources and distribution networks also play a significant role in the ability of suppliers to cost-effectively serve customers. We have an extensive network of approximately 80 depots for storage and distribution of highway deicing salt in North America. The majority of these depots are located on the Great Lakes and the Mississippi River and Ohio River systems. Deicing salt product from our Ogden facility supplies customers in the Western and

upper Midwest regions of the U.S. Treated rock salt, which is typically rock salt with magnesium chloride brine and organic materials that enhance the salt’s performance, is sold throughout our markets.

We believe our production capability at our Winsford mine and favorable logistics position enhance our ability to meet the U.K.’s winter demands. Due to our strong position, we are viewed as a key supplier by the U.K.’s Highways Agency. In the U.K., approximately 75% of our highway deicing customers have multi-year contracts.

Winter weather variability is the most significant factor affecting salt sales for deicing applications because mild winters reduce the need for salt used in ice and snow control. On average, over the last three years, approximately two-thirds of our deicing product sales occurred during the North American and European winter months of November through March. The vast majority of our North American deicing sales are made in Canada and the Midwestern U.S. where inclement weather during the winter months causes dangerous road conditions. In keeping with industry practice, we stockpile salt to meet estimated requirements for the next winter season. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Seasonality” for more information on the seasonality of our Salt segment results.

Our principal chemical customers are producers of intermediate chemical products used in the production of vinyls and other chemicals, pulp and paper, as well as water treatment and a variety of other industrial uses. We typically have multi-year supply agreements with these customers. Price, service, product quality and security of supply are the major competitive market factors.

Sales of our consumer and industrial products accounted for 40% of our fiscal 2024 Salt segment sales. We are the third largest producer of consumer and industrial salt products in North America. These products include commercial and consumer applications, such as water conditioning, consumer and professional ice control, food processing, agricultural applications, table salt and a variety of industrial applications. We estimate we are among the largest private-label producers of water conditioning salt in North America and of table salt in Canada. Our Sifto brand encompasses a full line of salt products, which are well recognized in Canada.

Our consumer and industrial business has broad product lines with both private-label and Company brands. Our consumer and industrial product line is distributed through many channels, including retail, agricultural, industrial, janitorial and sanitation, and resellers. These consumer and industrial products are channeled from our plants and third-party warehouses to our customers using a combination of direct sales personnel, contract personnel and a network of brokers or manufacturers’ representatives.

The chart below shows our annual sales volumes of Salt segment products for the fiscal years ended September 30, 2024, 2023 and 2022:

We face strong competition in each of the markets in which we operate. In North America, other large, nationally and internationally recognized companies compete with our Salt segment products. In addition, there are also several smaller regional producers of salt. There are several importers of salt into North America, which mostly impact the East Coast and West Coast of the U.S. where we have minimal market presence. Two competitors serve the highway deicing salt market in the U.K., one in Northern England and one in Northern Ireland. Typically, there are not significant imports of highway deicing salt into the U.K. 

Salt is a commodity, which limits the potential for product differentiation and increases competition. Additionally, low barriers to entry in the consumer and industrial markets increase competition. Our advantageous geographical locations, superior assets and distribution network strengthen our competitive position.

Fertilizers are critical for efficient crop production using the limited arable land resources available around the world. The nutrients needed to ensure plant health can be divided into three categories:

•macro nutrients - the traditional NPK fertilizers (nitrogen (N), phosphorus (P) and potassium (K));

•secondary nutrients - calcium, magnesium and sulfur; and

•specialty plant nutrients - trace elements of iron, manganese, copper, boron, zinc, molybdenum, chlorine and nickel.

Factors influencing the plant nutrition market include world grain and food supply, currency fluctuations, weather and climate change, grower incomes, changes in consumer diets, general levels of economic activity, government food programs, governmental agriculture and energy policies in the U.S. and around the world, and the amount or type of crop grown in certain locations, or the type or amount of fertilizer product used. In addition, our Plant Nutrition segment results can be impacted by seasonality (see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Seasonality” for more information).

Our Plant Nutrition segment currently generates nearly all of its sales and earnings through the production and sale of SOP. There are two major forms of potassium-based fertilizer, SOP, a specialty form of potassium which also provides plant-ready sulfur, and muriate of potash (“MOP” or “KCl”). Based on data from Green Markets® A Bloomberg Company, management estimates the average annual worldwide consumption of all potash fertilizers is approximately 81 million tons, with MOP accounting for approximately 87% of all potash used in fertilizer production. SOP represents approximately 10% of all potash production. The remainder of potash is supplied in forms containing varying concentrations of potassium (expressed as potassium oxide) along with different combinations of co-nutrients. SOP, which contains the equivalent of approximately 50% potassium oxide, maintains a price premium over MOP due to the fact that it contains the secondary nutrient, sulfur, does not contain chlorides and is more expensive to produce than MOP. Additionally, many high-value or chloride-sensitive crops experience improved yields and quality when SOP is applied instead of MOP. SOP is also a more cost-effective alternative to other forms of specialty potash.

Our SOP sales are primarily concentrated in the Western and Southeastern U.S. where the crops and soil conditions favor the use of low-chloride potassium nutrients. Consequently, weather patterns and field conditions in these locations can impact Plant Nutrition sales volumes.

While long-term global consumption of potash has increased in response to growing populations and the need for additional food supplies, the market for commodity potash has been challenged in recent years due to downturns in the broader crop market which pressure grower incomes. Additionally, demand for our SOP products has been resilient despite the challenges facing the global potash market.

We expect the long-term demand for potassium nutrients to continue to grow as arable land per capita decreases, thereby encouraging improved crop yield efficiencies. We expect our future growth to stem from the conversion of certain commodity potassium applications into higher yield SOP applications.

Approximately 92% of our Plant Nutrition segment sales in fiscal 2024 were made to U.S. customers, who include retail fertilizer dealers and distributors of agricultural products as well as professional turf care customers. In some cases, these dealers and distributors combine or blend our Plant Nutrition segment products with other fertilizers and minerals to produce fertilizer blends tailored to individual requirements.

We currently generate nearly all of our sales and earnings in our Plant Nutrition segment through the production and sale of SOP. Our SOP is sold in various grades under our Protassium+ brand. Our Protassium+ product line consists of different grades sized for use in broadcast spreaders, direct application and liquid fertilizer solutions. Our turf product line consists of grades sized for use by the turf and ornamental markets and for blends used on golf course greens. We also provide a product line suitable for organic cropping systems with grades sized for a wide range of applications.

Our Protassium+ product line is generally sold to crop input distributors and dealers who may blend our products with other fertilizer products to sell to farmers and growers, or it may be sold as the final product. Our commercial efforts focus on educating and selling the agronomic benefits of SOP as a source of potassium nutrients.

SOP is marketed globally; based on our latest information, approximately 55% of the world’s 10.7 million tons of estimated capacity located in China. Management estimates global SOP capacity to be as follows:

Source: Green Markets ® A Bloomberg Company

We are the leading SOP producer and marketer in North America and we also market SOP products internationally, depending on market conditions. Our major competition for SOP sales in North America includes imports from the European Union. Fluctuations in the values of foreign currencies in relation to the U.S. dollar coupled with Baltic freight rates impact the level of international competition we face. As the only SOP producer with production facilities in North America, and as a result of our logistically favorable production site near Ogden, Utah, we estimate that our share of the North American market is sizable. In addition to imported SOP, there is functional competition between SOP and other forms of potassium crop nutrients, such as MOP. The specialty plant nutrient market is highly fragmented. Commodity and specialty crops require specialty plant nutrients in varying degrees depending on the crop and soil conditions.

Fortress is our fire retardant company working to develop long-term aerial and ground-applied fire retardant products to help prevent and combat wildfires.

Fortress had one primary customer, the USFS, for the 2023 fire season. Fortress did not secure a contract for the 2024 fire season. As of the date of this report, we have generated all of our fire retardant revenue in the U.S. and it is not material in comparison to our Salt and Plant Nutrition segments.

DeepStore is our records management business in the U.K. that utilizes portions of previously excavated space in our salt mine in Winsford, Cheshire, for secure underground document and archive storage and one warehouse location in London, England. Currently, DeepStore does not have a significant share of the document storage market in the U.K., and it is not material in comparison to our Salt and Plant Nutrition segments.

To protect our intellectual property, we rely on a combination of approaches, including but not limited to, patents, trademarks, copyrights, trade secret protection, employee and third-party non-disclosure agreements, license arrangements and domain name registrations. These protections are important to our business and we believe that our success is at least partly dependent on the acquisition and maintenance of these rights. However, we rely primarily on the innovative skills, technical competence, operational knowledge and marketing abilities required by our business in order to succeed.

We sell many of our products under a number of registered trademarks that we believe are widely recognized in the industry. Our trademarks registered pursuant to applicable intellectual property laws include, but are not limited to, COMPASS MINERALS, AMERICAN STOCKMAN, CANADIAN STOCKMAN, DUSTGARD, FREEZGARD, ICEAWAY, PROSOFT, SAFE STEP, SAFE STEP PRO, SIFTO, SURESOFT, SURE PAWS and PROTASSIUM+ and FORTRESS FIRE RETARDANT SYSTEMS.

Any issued patents, trademarks or copyrights on our proprietary technology may not provide us with substantial protection or be commercially beneficial to us. The issuance of a patent is not conclusive as to its validity or its enforceability.

Competitors may challenge our patent rights or assert alleged claims regarding infringement. If our patents are held invalid or unenforceable, our competitors could commercialize our patented technology. If it is determined by a court of competent jurisdiction that we have infringed another party’s patent, we may not be able to use or sell that technology.

With respect to proprietary know-how, we rely on trade secret protection and confidentiality agreements. Monitoring the unauthorized use of our technology is difficult, and we may not be able to prevent unauthorized use of our technology. The disclosure or misappropriation of our intellectual property could harm our ability to protect our rights and our competitive position (see “Risk Factors—Our intellectual property may be misappropriated or subject to claims of infringement” for more information).

As of September 30, 2024, we employed 1,894 employees, of which 986 were located in the U.S., 721 were located in Canada and 187 were located in the U.K. Nearly 50% of our workforce is represented by collective bargaining agreements. Of our 12 collective bargaining agreements in effect on September 30, 2024, six will expire in fiscal 2025 (including our Cote Blanche mine), four will expire in fiscal 2026 (including our Goderich mine), and two will expire in fiscal 2027.

We believe that our workforce drives the success of our Company and is paramount to creating long-term value. We strive to put our employees first and foster an environment in which their safety, well-being, career progression and sense of belonging are prioritized. By investing in our workforce and culture, we are helping to ensure a strong, sustainable future for our Company.

To help maintain a focus on our workforce and culture, as well as measure our progress in these areas, we announced in fiscal 2022 a set of fiscal 2025 environmental, social and governance goals and targets, including in the categories of safety, employee development, and diversity and inclusion.

At Compass Minerals, we prioritize a safe and healthy work environment for all our employees. We are focused on the ultimate goal of zero harm, which includes zero injuries to our employees and contractors, and zero environmental incidents. This goal requires the collaboration and participation of all employees, at every site. We measure zero harm by how we are decreasing our total recordable injury rate (“TRIR”) and improving our environmental compliance-based metrics. For the fiscal year ended September 30, 2024, our TRIR is 1.28. Our reporting standard, TRIR, is a stringent incident reporting standard based upon the U.S. Department of Labor’s Mine Safety and Health Administration regulations. The standard includes all medical treatment, lost time and restricted-duty injuries based upon 200,000 exposure hours to enable increased reporting consistency across our organization and provides greater clarity of operational safety performance and capabilities.

A key driver of this trajectory has been the implementation of the SafeStart® methodology across our organization. Tools introduced through SafeStart training addressed unintentional human error and critical safety habits, which reduce risk and the probability of injury. Additionally, we approach health and safety through the lens of continuous improvement and utilize an environmental, health and safety framework that includes policies, procedures, training and Company standards that go beyond compliance. Each of our operational sites has a safety committee, which includes employees and management, and when applicable, union representation. In addition, our sites form focus groups to engage team members and establish best practices for specific health and safety issues. To keep health and safety top of mind, we encourage our employees to begin internal meetings with a “safety share,” a safety reminder or a lesson learned.

In fiscal 2024, our journey to improve organizational health continued to involve ensuring that our workforce is engaged, supported and equipped to support the needs of our customers and communities. One area of focus in fiscal 2024 included an enterprise-wide, CEO-led discussion about the importance of living our Core Values and demonstrating Integrity, Respect, Collaboration, Value Creation and High Performance in every interaction.

At Compass Minerals, we believe that everyone has a voice and every voice matters. We hire, promote and retain people with different backgrounds and experiences, which strengthens our culture and brings a wider range of perspectives to help solve critical issues. Our diversity, belonging, inclusion and equity (“DBIE”) approach focuses on raising awareness and educating employees, engaging employees in initiatives to create a sense of belonging, and finally, having a positive impact on our organization and in our communities by partnering with external groups working to improve DBIE.

In fiscal 2024, we maintained and continued to grow our six employee resource groups (“ERGs”): Black Employees and Allies, Emerging Leaders, Compass Pride for LGBTQ+ employees and allies, Women and Allies, Advanced Career for seasoned employees and allies and Asian Employees and Allies. To further support the importance of inclusion and belonging, we celebrated International Allyship Day at all locations in fiscal 2024. On this day, we came together to recognize the

importance of standing up for one another and building bridges of support and understanding. In addition, we continue to focus on strategies to diversify our talent pipeline and to ensure our internal processes are inclusive.

In fiscal 2024, we continued utilizing Compass Minerals University (“CMU”), an online platform for employee training and development. CMU provides our employees with on‑demand access to more than 500 learning modules on topics ranging from project management to strategic thinking to emotional intelligence. Content is presented in a variety of formats from videos and readings to downloadable templates and work aids for managers to use in team meetings or with direct reports. In addition, there are live virtual trainings our employees can attend.

We have other forms of development opportunities for employees, such as training on performance mindset, team effectiveness and communication styles, and programs available through our ERGs. Several options are available to employees who are looking to increase their knowledge and grow professionally.

Additionally, employees have opportunities for professional development through strategic partnerships with several outside organizations such as Central Exchange, Society of Women Engineers, and American Royal, as well as through membership in trade groups including The Fertilizer Institute, Essential Minerals Association, U.K. Salt Association and Ontario Mining Association.

Full-time employees can also take advantage of our tuition reimbursement program to further their education in subjects and degree programs that are relevant to our business.

Beyond the success of our Company and our people, we are committed to supporting and creating value for communities where our employees live and work. We recognize that in many areas, we play an integral role in providing jobs and fostering local economic growth. On a larger scale, through our products, we support safety, sustainability and addressing food insecurity in communities around the world.

Focused on Company giving and employee volunteerism to positively impact our communities, Compass Minerals Cares, our community engagement program, looks to the United Nations Sustainable Development Goals to guide community engagement initiatives. We also align charitable giving and volunteer engagement with our Core Purpose to help keep people safe, feed the world and enrich lives, every day.

Our operations subject us to an evolving set of federal, state, local and foreign environmental, health and safety (“EHS”) laws and regulations. These EHS laws and regulations regulate, or propose to regulate, the conduct of our mining and production operations, including safety procedures and process safety management; management and handling of raw and in-process materials and finished products; air and water quality impacts from our facilities; emissions of greenhouse gases (including carbon or emissions taxes); management of hazardous and solid wastes; remediation of contamination at our facilities; and post-mining land reclamation. Additional legislative and regulatory measures to address climate change and greenhouse gas emissions (including carbon or emissions taxes) are in various phases of consideration and enactment. For further discussion of how EHS laws and regulations may impact our business, see Item 1A, “Risk Factors.”

While a number of our capital projects indirectly result in environmental improvements, we estimate that our fiscal 2024 environmental-specific capital expenditures were $3.8 million. We expect to have approximately $3.6 million of environmental capital expenditures in fiscal 2025 on a variety of projects. However, future capital expenditures are subject to a number of uncertainties, including changes to environmental laws and regulations, changes to our operations or unforeseen remediation requirements, and these expenditures could exceed our expectations.

As of September 30, 2024, we had recorded $1.8 million of accruals for environmental liabilities. We accrue for environmental liabilities when we believe it is probable that we will be responsible, in whole or in part, for environmental investigation or remediation activities and the expenditures for these activities are reasonably estimable. However, the extent and costs of any environmental investigation or remediation activities are uncertain and difficult to estimate and could exceed our expectations, which could materially affect our financial condition and operating results.

Our operations require permits for extraction of salts and brine, air emissions, surface water discharges of process material and wastes, waste generation, injection of brine and wastewater into subsurface wells and other activities. As a result, we hold numerous environmental and mineral extraction permits, water rights and other permits, licenses and approvals from governmental authorities authorizing operations at each of our facilities. These permits, licenses and approvals are typically subject to renewals and reissuances. Expansion of our operations or production capacity, or preservation of existing rights in some cases, is also predicated upon securing any necessary permits, licenses and approvals. The terms and conditions of future

EHS laws and regulations, permits, licenses and approvals may be more stringent and may require increased expenditures on our part. In addition, although we do not engage in hydraulic fracturing (commonly known as “fracking”), laws and regulations targeting fracking could lead to increased permit requirements and compliance costs for non-fracking operations, including our Salt operations, which require permitted wastewater disposal wells that sometimes receive fluid waste from fracking operations as well.

Our Cote Blanche mine, an underground salt mine located in St. Mary Parish, Louisiana, is subject to regulation by the Mine Safety and Health Administration (“MSHA”) under the Federal Mine Safety and Health Act of 1977, as amended (the “Mine Act”). MSHA is required to regularly inspect the Cote Blanche mine and issue a citation, or take other enforcement action, if an inspector or authorized representative believes that a violation of the Mine Act or MSHA’s standards or regulations has occurred. As required by MSHA, these operations are regularly inspected by MSHA personnel. See “Mine Safety Disclosures” and Exhibit 95 to this report for information concerning mine safety violations and other regulatory matters required by SEC rules. The cost of compliance and penalties for violations of the Mine Act have been and could potentially be significant. Our underground salt mines located in Goderich, Ontario, Canada and Winsford, Cheshire, U.K. are subject to similar regulations regarding health and safety, and the cost of compliance with these regulations also have been and are expected to be significant.

We have post-closure reclamation obligations, primarily arising under our mining permits or by agreement. Many of these obligations include requirements to maintain financial surety bonds to fund reclamation and site cleanup following the ultimate closure of our mines or certain other facilities. As a result, we maintain financial surety bonds to satisfy these obligations.

We are also impacted by the U.S. Clean Air Act (the “Clean Air Act”) and other EHS laws and regulations that regulate air emissions. These regulatory programs may require us to make capital expenditures (for example, by installing expensive emissions abatement equipment), modify our operational practices, obtain additional permits or make other expenditures, which could be significant.

We endeavor to conduct our operations in compliance with all applicable EHS laws, regulations, permits or approvals. However, because of extensive and comprehensive regulatory requirements, violations occur from time to time in our industry, and from time to time we have received notices from governmental agencies that we are not in compliance with certain EHS laws, regulations, permits or approvals and have incurred fines or penalties for these violations. Upon receipt of these notices, we evaluate the matter and take appropriate corrective actions.

In fiscal 2024, we announced a binding Voluntary Agreement (“Voluntary Agreement”) with the Utah Division of Forestry, Fire and State Lands (“FFSL”) outlining water and land conservation commitments we are making toward the long-term health of the Great Salt Lake. Among other things, the Voluntary Agreement outlines a progressive set of brine withdrawal caps for certain of our consumptive water rights, based on annual lake elevation and informed by the Great Salt Lake Strategic Plan.

Many of our past and present facilities have been in operation for decades. Operations at these facilities have historically involved the use and handling of regulated chemical substances, salt, salt byproducts and waste by us and our predecessors.

At many of these facilities, releases and disposal of regulated substances have occurred and could occur in the future, which could require us to investigate, undertake or pay for remediation activities under the U.S. Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”) and other similar EHS laws and regulations. These laws and regulations may impose “no fault” liability on past and present owners and operators of facilities associated with the release or disposal of hazardous substances, regardless of fault or the legality of the original actions. Additionally, one past or present owner or operator may be required to bear more than its proportional share of liability if payments cannot be obtained from other responsible parties.

In addition, third parties have alleged in the past and could allege in the future that our operations have resulted in contamination to neighboring off-site areas or third-party facilities, including third-party disposal facilities for regulated substances generated by our operations, which could result in liability for us under CERCLA or other EHS laws and regulations.

We have incurred and expect to continue to incur costs and liabilities as a result of our current and former operations and our predecessor’s operations. In the past, we have agreed to undertake or pay for investigations to determine whether remediation will be required under CERCLA or otherwise to address any contamination. In other instances, we have agreed to perform remediation activities or have undertaken voluntary remediation to address identified contamination.

As a global company, we are subject to complex and evolving laws and regulations. The most significant government regulations that impact our business, in addition to EHS laws and regulations, operating requirements and remedial activities, are discussed below. For further discussion of how government regulations may impact our business, see Item 1A, “Risk Factors.”

Taxes and Tariffs - We are subject to complex requirements of federal, state, local and foreign laws and regulations related to taxation, tariffs and import duties. See Part II, Item 8, Note 10 of our Consolidated Financial Statements for more information on taxes.

Import and Export Requirements, Anti-Corruption Laws and Related Matters - We manufacture, market and sell our products both inside and outside the U.S. and ship our products across international borders. As a result, we are required to comply with a number of U.S. and international regulations, which include fair competition (antitrust) laws, import and export requirements, customs laws and anti-corruption laws, such as the U.S. Foreign Corrupt Practices Act (the “FCPA”), the U.K. Bribery Act and the Canadian Corruption of Foreign Public Officials Act, which generally prohibit the making or offering of improper payments to foreign government officials and political figures for the purpose of obtaining or retaining business or to gain an unfair business advantage.

Employment and Labor Relations - We are also subject to numerous federal, state, local and foreign laws and regulations governing our relationships with our employees, including those relating to wages, overtime, labor matters, working conditions, hiring and firing, non-discrimination, immigration, work permits and employee benefits.

Management identified material weaknesses in internal control over financial reporting in conjunction with the restatement described in the Explanatory Note of our Form 10-K/A, filed with the SEC on October 29, 2024. The description of the material weaknesses that were determined to exist as of September 30, 2023 and 2024 is included under Part II Item 9A of this Form 10-K.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected in a timely basis.

While we are taking steps to address the identified material weaknesses and prevent additional material weaknesses from occurring, it cannot be assured that the measures the Company has taken to date, and is continuing to implement, will be sufficient to remediate the material weaknesses or to avoid potential future material weaknesses. Accordingly, there could continue to be a reasonable possibility that the material weaknesses identified, or other material weaknesses or deficiencies identified in the future, could result in a misstatement of accounts or disclosures that would result in a material misstatement of the Company’s financial statements that would not be prevented or detected on a timely basis or cause us to fail to meet our obligations under securities laws, stock exchange listing rules, or debt instrument covenants to file periodic financial reports on a timely basis. Any of these failures could result in adverse consequences that could materially and adversely affect the Company’s business, including an adverse impact on the market price of its common stock, potential action by the SEC, shareholder lawsuits, delisting of the Company’s stock, potential covenant defaults, and general damage to its reputation. The Company has incurred and expects to incur additional costs to rectify the material weaknesses or new issues that may emerge, and the existence of these issues could adversely affect its reputation or investor perceptions. The Company maintains director and officer liability insurance, for which it must pay substantial premiums. The additional reporting and other obligations resulting from the material weaknesses, including any litigation or regulatory inquires that may result therefrom, increase legal and financial compliance costs and the costs of related legal, accounting and administrative activities.

Our operations can involve or be subject to significant risks and hazards, including environmental hazards, industrial accidents and natural disasters. Our underground salt mining operations and related processing activities have in the past, and may in the future be subject to hazards such as industrial and mining accidents, fire, natural disasters, explosions, unusual or unexpected geological formations or movements, water intrusion and flooding. For example, MSHA considers our Cote Blanche mine to be a “gaseous mine” and, as a result, is subject to a heightened risk of explosion and fire. These potential risks include damage or impacts from pipeline and storage tank leaks and ruptures; explosions and fires; mechanical failures; earthquakes, tornadoes, hurricanes, flooding and other natural disasters; and chemical spills and other discharges or releases of toxic or hazardous substances or gases at our sites or during transportation.

These hazardous activities pose significant management challenges and could result in loss of life, a mine shutdown, damage to or destruction of our properties and surrounding properties, production facilities or equipment, production delays or business interruption. Our insurance coverage may be insufficient to cover all losses or claims associated with our operations, including these operational risks.

Our salt mining operations involve complex processes, which are affected by the mineralogy of the mineral deposits and structural geologic conditions and are subject to related risks. For example, unexpected geological conditions could lead to

significant water inflows and flooding at any of our underground mines, which could result in a mine shutdown, serious injuries, loss of life, increased operational costs, production delays, damage to our mineral deposits and equipment damage. We have minor water inflows at our Cote Blanche and Goderich salt mines that we actively monitor and manage. Underground mining also poses the potential risk of mine collapse or ceiling collapse because of the mine geology and the rate and volume of minerals extracted, among other potential causes. We could also have a ceiling collapse in the brine wells used to extract salt for mechanical evaporation, which could increase costs and cause production delays.

Variations in the mineralogy and geology of our mineral deposits have limited, and could continue to limit, our ability to extract these deposits, increase our extraction costs and impact the purity and suitability of extracted minerals to create products for sale and to meet customer specifications. This could adversely impact our ability to fulfill our contracts, resulting in significant contractual penalties and loss of customers.

Weather conditions, including amounts, timing and duration of wintry precipitation and snow events, excessive hot or cold temperatures, rainfall and drought, can significantly impact our sales, production, costs and operational results and impact our customers. From year to year, sales of our deicing products and profitability of the Salt segment are affected by weather conditions in our markets. Any prolonged change in weather patterns in our markets, as a result of climate change or otherwise, could have a material impact on the results of our operations.

In addition, our ability to produce SOP, sodium chloride and magnesium chloride, from our solar evaporation ponds located near Ogden, Utah, is dependent upon sufficient lake brine levels in the Great Salt Lake and hot, arid summer weather conditions. Prolonged periods of precipitation, lack of sunshine, cooler weather or increased mountain water run-off during the evaporation season could reduce mineral concentrations and evaporation rates, leading to decreases in our production levels. Similarly, in recent years drought or decreased mountain snowfall and associated fresh water run-off have reduced brine levels, which could also impact mineral composition and our mineral harvesting process, amount and timing. Lake level fluctuations and other factors could alter brine levels or mineral concentration levels, which may disrupt our typical two- to three-year evaporation production cycle. Similar factors could negatively impact the lake level and concentration of sulfates at the Big Quill Lake, impacting the operations at our Wynyard, Saskatchewan, Canada, facility. The occurrence of these events at the Great Salt Lake or Big Quill Lake (as a result of climate change or otherwise) could lead to decreased production levels, increased operating costs and significant additional capital expenditures.

Weather conditions have historically caused volatility in the agricultural industry (and indirectly in our results of operations) by causing crop failures or significantly reduced harvests, which can adversely affect application rates, demand for our SOP products and our customers’ creditworthiness. Weather conditions can also lead to a reduction in farmable acres, flooding, drought or wildfires, which could also adversely impact the number of acres planted, growers’ crop yields and the uptake of plant nutrients, reducing the need for application of plant nutrition products for the next planting season, which could result in lower demand for our SOP products and impact sale prices. Weather conditions also impact our fire retardant business, since hotter and drier summer weather is generally correlated with a higher prevalence of wildfires.

Our Ogden facility produces three mineral salts - specifically, SOP, sodium chloride and magnesium chloride products - from the high mineral concentrations within the ambient lake brine in the Great Salt Lake. Our ability to produce SOP, sodium chloride and magnesium chloride at our Ogden facility is dependent upon, among other matters, sufficient lake elevations in the Great Salt Lake and our continued ability to maintain, renew or acquire the permits, licenses and approvals required to access ambient lake brine in the Great Salt Lake.

Sustained drought (as a result of climate change or otherwise), lower lake levels or increased mineral concentrations in the Great Salt Lake could impact mineral composition and our mineral harvesting process, amount and timing. Lake level fluctuations and other factors, including state or federal actions to manage the salinity of the Great Salt Lake, could alter north arm lake levels and may disrupt our evaporation production cycle, impact our access to ambient lake brine in the Great Salt Lake or increase our related capital expenditures and production costs.

We conduct our operations through a limited number of key production and distribution facilities. These facilities include our underground salt mines, our evaporation plants, our solar evaporation ponds and facilities and the distribution facilities, depots and ports owned by us and third parties. Many of our products are produced at one or two of these facilities. Any disruption of operations at one of these facilities could significantly affect production of our products, distribution of our products or our ability to fulfill our contractual obligations, which could damage our customer relationships.

For example, our two North American salt mines together constituted approximately 70% of our salt production capacity as of September 30, 2024, and supply most of the salt sold by our North American highway deicing business and significant portions of the salt sold by our consumer and industrial business. A production interruption at one of our salt mines could adversely affect our ability to fulfill our salt contracts and our ability to secure future contracts in affected markets or other markets or could lead to increased costs to service customers from alternative supply sources. Our salt mines also have limited access ways and shafts and any inability to use these access ways and shafts could impede our ability to operate or cause a production interruption. In addition, we only have a limited number of distribution facilities in the markets in which we sell our salt products. Failure to have our salt products at a specific distribution facility when needed (for example during a snow event) could adversely impact our ability to fulfill our highway deicing sales contracts, resulting in significant contractual penalties and loss of customers.

Similarly, our plant nutrition product, SOP, is only produced at two locations: our solar evaporation ponds and facilities located adjacent to the Great Salt Lake near Ogden, Utah, and our facility near Big Quill Lake in Saskatchewan, Canada. SOP production from these facilities could be disrupted or negatively impacted by structural damage, as a result of dike failure or other factors, which could result in reduced sales. A production interruption or disruption at one or more of our facilities could result in a loss of customers, a loss in revenue or subject us to fines or penalties.

Our operations depend upon critical equipment, such as continuous mining machines, hoists, conveyor belts, bucket elevators, loading equipment, baghouses, compactors and dryers. This equipment could be damaged or destroyed, suffer breakdowns or failures or deteriorate due to wear and tear sooner than we estimate, and we may be unable to replace or repair the equipment in a timely manner or at a reasonable cost. If these events occur, we may incur additional maintenance and capital expenditures, our operations could be materially disrupted and we may not be able to produce and ship our products.

In recent years, we have made significant expenditures on large capital projects, including a shaft relining project at our Goderich mine and upgrading the barge dock at the Cote Blanche mine. In addition, maintaining our existing facilities requires significant capital expenditures, which may fluctuate materially. We also may make significant capital expenditures in the future to expand or modify our existing operations, including projects to expand or improve our facilities (including new mine level development and mine expansion to access additional mineral deposits, or to augment our Ogden facility’s pond storage capacity) or equipment and projects to improve our computer systems, information technology and operations technology. These activities or other capital improvement projects may require the temporary suspension of production at our facilities, which could have a material adverse effect on the results of our operations.

Any capital project we undertake involves risks, including cost overruns, delays and performance uncertainties, and could interrupt our ongoing operations. The expected benefits from any of our capital projects may not be realized in accordance with our projections. Our capital projects may also result in other unanticipated adverse consequences, such as the diversion of management’s attention from other operational matters or significant disruptions to our ongoing operations.

Although we currently finance most of our capital expenditures through cash provided by operations, we also may depend on increased borrowing or other financing arrangements to fund future capital expenditures. If we are unable to obtain suitable financing on favorable terms or at all, we may not be able to complete future capital projects and our ability to maintain or expand our operations may be limited. The occurrence of these events could have a material adverse effect on our business, financial condition and results of operations.

We face numerous uncertainties in estimating our economically recoverable reserves and resources, and inaccuracies in our estimates could result in lower than expected revenues, higher than expected costs and decreased profitability.

A mineral is economically recoverable when the price at which it can be sold exceeds the costs and expenses of mining, processing and selling the mineral. Forecasts of our future performance are based on, among other things, estimates of our mineral reserves and resources. Our mineral reserve and resource estimates of the remaining tons of minerals in our mines and other mining properties are based on many factors, including engineering, economic and geological data assembled and analyzed by our staff and third parties, which include various engineers and geologists, the area and volume covered by our mining rights, assumptions regarding our extraction rates and duration of mining operations, and the quality of in-place reserves and resources. The reserve and resource estimates as to both quantity and quality are updated on a routine basis to reflect, among other matters, production of minerals from our mining properties and new mining or other data received.

There are numerous uncertainties inherent in estimating quantities and qualities of minerals and costs to mine recoverable reserves and resources, including many factors beyond our control. Estimates of mineral reserves and resources necessarily depend upon a number of variable factors and assumptions, any one of which may, if incorrect, result in an estimate that varies considerably from actual results. These factors and assumptions include:

•geologic and mining conditions, including our ability to access certain mineral deposits as a result of the nature of the geologic formations of our salt mines or other factors, which may not be fully identified by available exploration data and may differ from our experience in areas we currently mine;

•demand for our minerals;

•current and future market prices for our minerals, contractual arrangements, operating costs and capital expenditures;

•taxes and development and reclamation costs;

•mining technology and processing improvements;

•the effects of legislation or interpretations thereof, or regulation by governmental agencies;

•the ability to obtain, maintain and renew all required permits;

•employee health and safety;

•historical production from the area compared with production from other producing areas; and

•our ability to convert all or any part of our resources to economically extractable mineral reserves.

As a result, actual tonnage recovered from identified mining properties and revenues and expenditures with respect to our reserves and resources may vary materially from estimates. Thus, these estimates may not accurately reflect our actual reserves and resources. Any material inaccuracy in our estimates related to our reserves or resources could result in lower than expected revenues, higher than expected costs or decreased profitability, which could materially and adversely affect our business, results of operations, financial position and cash flows. Additionally, our reserve and resource estimates may be adversely affected in the future by interpretations of, or changes to, the SEC’s property disclosure requirements for mining companies.

Nearly 50% of our workforce in the U.S., Canada and the U.K. is represented by collective bargaining agreements. Of our 12 collective bargaining agreements in effect on September 30, 2024, six will expire in fiscal 2025 (including our Cote Blanche mine), four will expire in fiscal 2026 (including our Goderich mine), and two will expire in fiscal 2027.

Unsuccessful contract negotiations, adverse labor relations at any of our locations or other factors have in the past, and could in the future, result in strikes, work stoppages, work slowdowns, dissatisfied employees or other actions, which could disrupt our business and operations. These disruptions could negatively impact our business, our operations, our ability to produce or sell our products, our ability to service our customers and our ability to recruit and retain personnel and could result in significant additional costs as well as adversely affect our reputation, financial condition and operating results.

Energy costs, primarily natural gas and electricity, represent a substantial part of our total production costs. Our profitability is impacted by the price and availability of natural gas and electricity we purchase from third parties. Natural gas is a primary energy source used in the mechanically evaporated salt production process. Our contractual arrangements for the supply of natural gas have terms of up to three years, do not specify quantities and are automatically renewed unless either party elects not to do so. We do not have arrangements in place with back-up suppliers. We use natural gas derivatives to hedge some of our financial exposure to the price volatility of natural gas. A significant increase in the price of energy that is not recovered through an increase in the price of our products or covered through our hedging arrangements, or an extended interruption in the supply of natural gas or electricity to our production facilities, could have a material adverse effect on our business, financial condition and results of operations.

We use KCl in our salt and plant nutrition operations. Large price fluctuations in KCl can occur without a corresponding change in the sales price of our products sold to our customers. This could change the profitability of our products that require KCl, which could materially affect the results of our operations. In certain cases, we also source raw materials from a sole supplier and cannot guarantee that any supplier will be able to meet our requirements and any changes in their operations, including prolonged outages, could have a material adverse effect on our business.

We have a significant amount of indebtedness and may incur additional debt in the future. As of September 30, 2024, we had $922.8 million of outstanding indebtedness, including $383.9 million of borrowings under our senior secured credit facilities, which are further described in Part II, Item 8, Note 12 of our Consolidated Financial Statements. We pay significant interest on our indebtedness, with variable interest on our borrowing under our senior secured credit facilities based on prevailing interest rates. Significant increases in interest rates will increase the interest we pay on our debt. Our indebtedness could:

•require us to agree to less favorable terms, including higher interest rates, in order to incur additional debt, and otherwise limit our ability to borrow additional money or sell our stock to fund our working capital, capital expenditures and debt service requirements;

•impact our ability to implement our business strategy and limit our flexibility in planning for, or reacting to, changes in our business as well as changes to economic, regulatory or other competitive conditions;

•place us at a competitive disadvantage compared to our competitors with greater financial resources;

•make us more vulnerable to a downturn in our business or the economy;

•require us to dedicate a substantial portion of our cash flow from operations to the repayment of our indebtedness, thereby reducing the availability of our cash flow for other purposes;

•restrict us from making strategic acquisitions or cause us to make non-strategic divestitures; and

•materially and adversely affect our business and financial condition if we are unable to meet our debt service requirements or obtain additional financing.

In the future, we may incur additional indebtedness or refinance our existing indebtedness. If we incur additional indebtedness or refinance, the risks that we face as a result of our leverage could increase. Financing may not be available when needed or, if available, may not be available on commercially reasonable or satisfactory terms. Any downgrades from credit rating agencies such as Moody’s or Standard & Poor’s may adversely impact our ability to obtain financing or the terms of such financing.

Our ability to make payments on our indebtedness, refinance our indebtedness and fund planned capital expenditures will depend on our ability to generate future cash flows from operations. This, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control. There can be no assurance that our business will generate sufficient cash flows from operations or that future borrowings will be available to us under our revolving credit facility in an amount sufficient to enable us to make payments with respect to our indebtedness or to fund our other liquidity needs. If this were the case, we might need to refinance all or a portion of our indebtedness on or before maturity, sell assets, reduce or delay capital expenditures or seek additional equity financing. Our inability to obtain needed financing or generate sufficient cash flows from operations may require us to abandon or curtail capital projects, strategic initiatives or other investments, cause us to divest our business or impair our ability to make acquisitions, enter into joint ventures or engage in other activities, which could materially impact our business.

Our agreements governing our indebtedness contain covenants that limit our ability to:

•incur additional indebtedness or contingent obligations or grant liens;

•pay dividends or make distributions to our stockholders;

•repurchase or redeem our stock;

•make investments or dispose of assets;

•prepay, or amend the terms of, certain junior indebtedness;

•engage in sale and leaseback transactions;

•make changes to our organizational documents or fiscal periods;

•create or permit certain liens on our assets;

•create or permit restrictions on the ability of certain subsidiaries to make certain intercompany dividends, investments or asset transfers;

•enter into new lines of business;

•enter into transactions with our stockholders and affiliates; and

•acquire the assets of, or merge or consolidate with, other companies.

The credit agreement governing our senior secured credit facilities also requires us to maintain financial ratios, including an interest coverage ratio and a total leverage ratio, which we may be unable to maintain. As of September 30, 2024, our total net leverage ratio (as calculated under the terms of our credit agreement) was 4.89x. We would be in default under our credit agreement if our net leverage ratio exceeds 6.5x as of the last day of any quarter through the fiscal quarter ended September 30, 2025, gradually stepping down to 4.5x for the fiscal quarter ended December 31, 2026 and thereafter.

Various risks, uncertainties and events beyond our control could affect our ability to comply with the covenants, financial tests and ratios required by the agreements governing our indebtedness. If we default under our agreements governing our indebtedness, our lenders could cease to make further extensions of credit, accelerate payments under our other debt instruments (including hedging instruments) that contain cross-acceleration or cross-default provisions and foreclose upon any collateral securing that debt as well as restrict our ability to make certain investments and payments, pay dividends, repurchase our stock, enter into transactions with affiliates, make acquisitions, merge and consolidate, or transfer or dispose of assets.

If our lenders were to require immediate repayment, we may need to obtain new financing to be able to repay them immediately, which may not be available or, if available, may not be available on commercially reasonable or satisfactory terms. Under these circumstances, we might not have sufficient funds or other resources to satisfy all of our obligations.

We are subject to income tax primarily in the U.S., Canada and the U.K. Our effective tax rate could be adversely affected by changes in the mix of earnings in countries with differing statutory tax rates, changes in the valuation of deferred tax assets and liabilities and the discovery of new information in the course of our tax return preparation process. Our effective tax rate, tax expense and cash flows could also be adversely affected by changes in tax laws. We are also subject to audits in various jurisdictions and may be assessed additional taxes as a consequence of an audit.

Canadian provincial tax authorities have challenged our tax positions and assessed additional taxes on us, which are described in Part II, Item 8, Note 10 to our Consolidated Financial Statements. These tax assessments and future tax assessments could be material if the disputes are not resolved in our favor.

In the ordinary course of our business, there are many transactions and calculations that could be challenged by taxing authorities. This includes the values charged on the transfer of products between our subsidiaries. Although we believe our tax estimates and calculations are reasonable, they have been challenged by taxing authorities in the past. The final determination of any tax audits and litigation may take several years and be materially different from our historical income tax provisions and accruals in our consolidated financial statements. If additional taxes are assessed as a result of an audit, assessment or litigation, there could be a material adverse effect on our financial condition, income tax provision and net income in the affected periods as well as future profitability, cash flows and our ability to pay dividends and service our debt.

Some of our customers require access to credit in order to purchase our products. A lack of available credit to customers, due to global or local economic conditions or for other reasons, could adversely affect demand for our products and the sales of our products.

We extend trade credit to our customers in the U.S. and throughout the world, in some cases for extended periods of time. If these customers are unable to repay the trade credit from us, the results of our operations could be adversely affected. Our customers may be unable to repay the trade credit from us as a result of supply chain disruptions, market conditions in the agricultural sector, adverse weather conditions and increases in prices for other products and inputs that could increase the working capital requirements, indebtedness and other liabilities of our customers. We may not be able to limit our credit and collectability risk or avoid losses.

In connection with our dispute of tax assessments made by Canadian provincial tax authorities (described in more detail in Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Investments, Liquidity and Capital Resources” and Part II, Item 8, Note 10 of our Consolidated Financial Statements), we are required to post and maintain financial performance bonds. In addition, as part of our business operations, we are required to maintain financial surety or performance bonds with certain of our North American deicing customers and to fund reclamation and site cleanup following the ultimate closure of our mines and certain other facilities. We incur costs to maintain these financial assurance bonds and failure to satisfy these financial assurance requirements could materially affect our business, the results of our operations and our financial condition.

On April 22, 2024, the Board of Directors determined not to declare dividends for the foreseeable future in order to align our capital allocation priorities with our corporate focus on accelerating cash flow generation and debt reduction. The payment of any future dividends will be at the discretion of the Board of Directors and will depend upon our financial condition, results of operations, capital requirements, legal requirements, restrictions in our debt agreements and other factors deemed relevant by our Board of Directors. Although our operations are conducted through our subsidiaries, none of our subsidiaries is obligated to make funds available to pay dividends on our common stock. Accordingly, our ability to pay dividends to our stockholders is dependent on the earnings and the distribution of funds from our subsidiaries. Certain agreements governing our indebtedness contain limitations on our ability to pay dividends (including regular annual dividends), as described under “—The agreements governing our indebtedness impose restrictions that may limit our ability to operate our business or require accelerated debt payments.” We cannot provide assurances that the agreements governing our current and future indebtedness will permit us to pay dividends on our common stock.

The demand for our salt, plant nutrition and fire retardant products is seasonal, and the degree of seasonality can change significantly from year to year due to weather conditions, including the number of snow events, rainfall, drought and other factors.

Our salt deicing business is seasonal. On average, in each of the last three years, approximately two-thirds of our deicing product sales occurred during the North American and European winter months of November through March. Winter weather events are not predictable, yet we must stand ready to deliver deicing products to local communities with little advance notice under the requirements of our highway deicing contracts. As a result, we attempt to stockpile our highway deicing salt throughout the year to meet estimated demand for the winter season. Failure to deliver under our highway deicing contracts may result in significant contractual penalties and loss of customers. Servicing markets typically serviced by one production facility with product from an alternative facility may add logistics and other costs and reduce profitability.

Our plant nutrition business is also seasonal. As a result, we and our customers generally build inventories during the low demand periods of the year (which are typically winter and summer, but can vary due to weather and other factors) to ensure timely product availability during the peak sales seasons (which are typically spring and autumn, but can also vary due to weather and other factors). Demand for fire retardant products is also seasonal, being highest in summer months.

If seasonal demand is greater than we expect, or we experience increased costs and product shortages, and our customers may turn to our competitors for products that they would otherwise have purchased from us. If seasonal demand is less than we expect, we may have excess inventory to be stored (in which case we may incur increased storage costs) or liquidated (in which case the selling price may be below our costs). If prices for our products rapidly decrease, we may be subject to inventory write-downs. Our inventories may also become impaired through obsolescence or the quality may be impaired if our inventories are not stored properly. Low seasonal demand could also lead to increased unit costs.

When customers anticipate increasing potash selling prices, they tend to accumulate inventories in advance of the expected price increase. Similarly, customers tend to delay their purchases when they anticipate future selling prices for potash products will stabilize or decrease. These customer expectations can lead to a lag in our ability to realize price increases for our SOP products and adversely impact our sales volumes and selling prices.

Growers’ decisions to purchase plant nutrition products and the application rate for potash products depend on many factors, including expected grower income, crop prices, plant nutrition product prices, commodity prices, input prices and nutrient levels in the soil. Customers are more likely to decrease purchases and application rates when they expect declining agricultural economics or relatively high plant nutrient costs, other input costs or elevated soil nutrient levels. This variability can materially impact our prices and volumes sold.

We encounter strong competition in many areas of our business and our competitors may have significantly more financial resources than we do. Competition in our product lines is based on a number of factors, including product quality and performance, logistics (especially in Salt distribution), brand reputation, price and quality of customer service and support. Many of our customers attempt to reduce the number of vendors from which they purchase in order to increase their efficiency. To remain competitive, we need to invest in manufacturing, productivity, product innovation, marketing, customer service and support and our distribution networks. We may not have sufficient resources to continue to make such investments or maintain our competitive position. We may have to adjust our prices, strategy, product innovation, distribution or marketing efforts to stay competitive. In addition, our fire retardant business currently has one primary customer, the USFS. If the USFS were to choose not to enter into commercial agreements with us, that business would be adversely affected.

The demand for our products may be adversely affected by technological advances or the development of new or less costly competing products. For example, the development of substitutes for our plant nutrition products that can more efficiently mix with other agricultural inputs or have more efficient application methods may impact the demand for our products. Many of our products, including sodium chloride, magnesium chloride and SOP, have historically been characterized by a slow pace of technological advances. However, new production methods or sources for our products or the development of substitute or competing products could materially and adversely affect the demand and sales of our products. We also need to continue investing resources in our fire retardant product research and development in order to keep our products competitive.

Changes in competitors’ production, geographic or marketing focus could have a material impact on our business. We face global competition from new and existing competitors who have entered or may enter the markets in which we sell, particularly in our plant nutrition business. Some of our competitors may have greater financial and other resources than we do or are more

diversified, making them less vulnerable to industry downturns and better positioned to pursue new expansion and development opportunities. Our competitive position could suffer if we are unable to expand our operations through investments in new or existing operations or through acquisitions, joint ventures or partnerships.

Our business can be affected by inflation, including increases in freight rates, prices for energy and other costs. Sustained inflation could result in higher costs for transportation, energy, materials, supplies and labor. Our efforts to recover inflation-based cost increases from our customers may be hampered as a result of the structure of our contracts and the contract bidding process as well as the competitive industries, economic conditions and countries in which we operate. Accordingly, substantial inflation may result in a material adverse impact on our costs, profitability and financial results.

Transportation and handling costs are a significant component of our total delivered product cost, particularly for our salt products. The high relative cost of transportation favors producers whose mines or facilities are located near the customers they serve. We contract (directly and, from time to time, through third parties) bulk shipping vessels, barges, trucking and rail services to move our products from our production facilities to distribution outlets and customers. A reduction in the dependability or availability of transportation services, a significant increase in transportation service rates, adverse weather and changes to water levels on the waterways used for our products could impair our ability to deliver our products economically to our customers or expand our markets. For example, when the Mississippi river floods significantly or if water levels are significantly reduced by severe drought conditions (as they were in 2023), barges may be unable to traverse the river system and we may be prevented from timely delivering our salt products to our depots and customers, which could increase costs to deliver our products and adversely impact our ability to fulfill our contracts, resulting in significant contractual penalties and loss of customers.

In addition, diesel fuel is a significant component of our transportation costs. Some of our customer contracts allow for full or partial recovery of changes in diesel fuel costs through an adjustment to the selling price. However, a significant increase in the price of diesel fuel that is not passed through to our customers could materially increase our costs and adversely affect our financial results.

Significant transportation costs relative to the cost of certain of our products, including our salt products, limit our ability to increase our market share or serve new markets.

We have significant operations in Canada and the U.K. Our fiscal 2024 sales outside the U.S. were 26% of our total fiscal 2024 sales. Our overall success as a global business depends on our ability to operate successfully in differing economic, political and cultural conditions. Our international operations and sales are subject to numerous risks and uncertainties, including:

•economic developments including changes in currency exchange rates, inflation risks, exchange controls, tariffs, economic sanctions, other trade protection measures and import or export licensing requirements;

•difficulties and costs associated with complying with laws, treaties and regulations, including tax, labor and data privacy laws, treaties and regulations, and changes to laws, treaties and regulations;

•restrictions on our ability to own or operate subsidiaries, make investments or acquire new businesses;

•restrictions on our ability to repatriate earnings from our non-U.S. subsidiaries to the U.S. or the imposition of withholding taxes on remittances and other payments by our subsidiaries;

•political developments, government deadlock, political instability, political activism, terrorist activities, civil unrest and international conflicts (including impacts from the current war in Ukraine); and

•uncertain and varying enforcement of laws and regulations and weak protection of intellectual property rights.

A significant portion of our cash flow is generated in Canadian dollars and British pounds sterling and our consolidated financial results are reported in U.S. dollars. Our reported results can significantly increase or decrease based on exchange rate volatility after translation of our results into U.S. dollars. Exchange rate fluctuations could also impact our ability to meet interest and principal payments on our U.S. dollar-denominated debt. In addition, we incur currency transaction risk when we enter into a purchase or a sales transaction using a currency other than the local currency of the transacting entity. We may not be able to effectively manage our currency risks. For more information, see Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Effects of Currency Fluctuations and Inflation,” and Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk.”

In addition, we may face more competition in periods when foreign currency exchange rates are favorable to our competitors. A relatively strong U.S. dollar increases the attractiveness of the U.S. market for some of our international competitors while decreasing the attractiveness of other markets to us.

Conditions in the North American agricultural sectors can significantly impact our plant nutrition business. The agricultural sector can be affected by a number of factors, including weather conditions, field conditions (particularly during periods of traditionally high plant nutrition application), government policies, tariffs and import and export markets.

Demand for our products in the agricultural sector is affected by crop prices, crop selection, planted acreage, application rates, crop yields, product acceptance, population growth, livestock consumption and changes in dietary habits, among other things. Supply is affected by available capacity, operating rates, raw material costs and availability, feasible transportation, government policies, tariffs and global trade. In addition, the demand and price of our SOP products can be affected by factors such as plant disease.

MOP is the least expensive form of potash fertilizer and, consequently, it is the most widely used potassium source for most crops. SOP is utilized by growers for many high-value crops, especially crops for which low-chloride content fertilizers or the presence of sulfur improves quality and yield, such as almonds and other tree nuts, avocados, citrus, lettuce, tobacco, grapes, strawberries and other berries. Lower prices or demand for these crops could adversely affect demand for our products and the results of our operations.

When the demand and price of potash are high, our competitors are more likely to increase their production and invest in increased production capacity. An over-supply of MOP or SOP domestically or worldwide could unfavorably impact the prices we can charge for our SOP, as a large price disparity between potash products could cause growers to choose MOP or other less-expensive alternatives, which could adversely impact our sales volume and the results of our operations.

Similarly, conditions in the Salt sector can significantly impact our Salt segment. These conditions include weather conditions as well as import and export markets. Supply and demand imbalances can be caused by a number of factors, including weather conditions, operating rates, transportation costs and global trade.

We hold numerous environmental and mineral extraction permits, water rights and other permits, licenses and approvals from governmental authorities authorizing operations at each of our facilities. A decision by a governmental agency to revoke, substantially modify, deny or delay renewal of or apply conditions to an existing permit, license or approval could have a material adverse effect on our ability to continue operations at the affected facility and result in significant costs. For example, certain indigenous groups have challenged the Canadian government’s ownership of the land under which our Goderich mine is operated. There can be no assurances that the Canadian government’s ownership will be upheld or that our existing mining and operating permits will not be revoked or otherwise affected. In addition, although we do not engage in fracking, laws and regulations targeting fracking could lead to increased permit requirements and compliance costs for non-fracking operations, including our salt operations, which require permitted wastewater disposal wells. Rulemaking implementing Utah House Bill 513 (now codified as amended Utah Code §65A-6-4) may adversely impact mineral extraction on the Great Salt Lake, including our existing SOP, sodium chloride and magnesium chloride production. We may be impacted by the Voluntary Agreement with the Utah Division of FFSL, which outlines brine withdrawal caps based on annual lake elevation, discussed further in Item 1. “Business—Environmental, Health and Safety Matters and Other Regulatory Matters”.

Furthermore, many of our facilities are located on land leased from governmental authorities or third parties. Our leases generally require us to continue mining in order to retain the lease, the loss of which could have a material adverse effect on our ability to continue operations at the affected facility and result in significant costs. In some instances, we have received access rights or easements from third parties which allow for a more efficient operation than would exist without the access or easement. Loss of these access rights or easements could have a material adverse effect on us. In addition, many of our facilities are located near existing and proposed third-party industrial operations that could affect our ability to fully extract, or the manner in which we extract, the mineral deposits to which we have mining rights. For example, certain neighboring operations or land uses may require setbacks that could prevent us from mining portions of our mineral reserves or resources or using certain mining methods.

Expansion of our existing operations or production capacity, or preservation of existing rights in some cases, is also predicated upon securing any necessary permits, licenses and approvals.

We are currently, and may in the future become, subject to litigation, arbitration or other legal proceedings with other parties. Any claim that is successfully asserted against us in these legal proceedings, or others that could be brought against us in the future, may adversely affect our financial condition, results of operations or prospects. For example, on October 21, 2022 we and certain of our former officers, were named as defendants in a putative securities class action lawsuit filed in the United

States District Court for the District of Kansas, alleging that we and such officers made misleading statements damaging shareholders. We intend to vigorously defend these allegations. At this time, we are unable to assess with any certainty, what, if any, damages could be awarded in this matter. We are also involved periodically in other reviews, inquiries, investigations and other proceedings initiated by or involving government agencies (including litigation brought by Canadian provincial tax authorities as described in Part II, Item 8, Note 10 to our Consolidated Financial Statements), some of which may result in adverse judgments, settlements, fines, penalties, injunctions or other relief. In these types of matters, it is inherently difficult to determine whether any loss is probable or whether it is possible to estimate the amount of any reasonably possible loss. We cannot predict with certainty if, how or when such proceedings will be resolved or what the eventual judgment, settlement, fine, penalty or other relief, conditions or restrictions, if any, may be. Any eventual judgment, settlement, fine, penalty or other relief, conditions or restrictions could have a material impact on us. For further discussion of pending litigation and governmental proceedings and investigations, see Part II, Item 8, Note 10 and Note 13 to our Consolidated Financial Statements.

Our operations are subject to an evolving set of federal, state, local and foreign EHS laws and regulations. New or proposed EHS regulatory programs, as well as future interpretations and enforcement of existing EHS laws and regulations, may require modification to our facilities, require substantial increases in equipment and operating costs, subject us to fines, penalties or lead to interruptions, modifications or a termination of operations, which could involve significant capital costs, increases in operating costs or other significant impacts.

For example, we are impacted by the Clean Air Act and other EHS laws and regulations that regulate air emissions. These regulatory programs may subject us to fines or penalties or require us to install expensive emissions abatement equipment, modify our operational practices, obtain additional permits or make other expenditures. Our Ogden facility is located in an area expected to be of continued scrutiny by the Environmental Protection Agency and Utah Division of Air Quality with respect to certain air emissions and related issues under the Clean Air Act.

In addition, if new Clean Water Act regulations are adopted or increased compliance obligations are imposed on existing regulations, we could be adversely affected. For example, a significant portion of our salt products are distributed through salt depots owned and operated by third parties. If these depots are required to adopt more stringent stormwater management practices or are subject to increased compliance requirements under existing Clean Water Act regulations, these depots may pass on any increased costs to us, exit the depot business (requiring us to find new depot partners or establish Company-owned depots) or otherwise cause an adverse impact to our ability to deliver salt to our customers. Additionally, governmental agencies could restrict or limit the use of road salt for highway deicing purposes or adopt laws and regulations to address climate change and greenhouse gases, which could have a material impact on us. See Item 1, “Business—Environmental, Health and Safety and Other Regulatory Matters” for more information about EHS laws and regulations affecting us and their potential impact on us.

Risks of environmental liabilities is inherent in our current and former operations. At many of our past and present facilities, releases and disposals of regulated substances have occurred and could occur in the future, which could require us to investigate, undertake or pay for remediation activities under CERCLA and other similar EHS laws and regulations. The use, handling, disposal and remediation of hazardous substances currently or formerly used by us, or the liabilities arising from past releases of, or exposure to, hazardous substances may result in future expenditures that could materially and adversely affect our financial results, cash flows or financial condition. Our facilities are also subject to laws and regulations which require us to monitor and detect potential environmental hazards and damages. Our procedures and controls may not be sufficient to timely identify and protect against potential environmental damages and related costs.

We record accruals for contingent environmental liabilities when we believe it is probable that we will be responsible, in whole or in part, for environmental investigation, asset retirement obligation or remediation activities and the expenditures for these activities are reasonably estimable. However, the extent and costs of any environmental investigation, asset retirement obligation or remediation activities are inherently uncertain and difficult to estimate and could exceed our expectations, which could materially affect our financial condition and operating results.

Additionally, we previously sold a portion of our U.K. salt mine to a third party, which operates a waste management business. The third party’s business, under governmental permits, is allowed to securely dispose certain hazardous waste at the property they own and they pay us fees for engaging in this activity.

Our operations and activities inside and outside the U.S., as well as the shipment of our products across international borders, require us to comply with a number of federal, state, local and foreign laws and regulations, which are complex and increase our cost of doing business. These laws and regulations include import and export requirements, economic sanctions

laws, customs laws, tax laws and anti-corruption laws, such as the FCPA, the U.K. Bribery Act and the Canadian Corruption of Foreign Public Officials Act. We cannot predict how these or other laws or their interpretation, administration and enforcement will change over time. There can be no assurance that our employees, contractors, agents, distributors, customers, payment parties or third parties working on our behalf will not take actions in violation of these laws. Any violations of these laws could subject us to civil or criminal penalties, including fines or prohibitions on our ability to offer our products in one or more countries, debarment from government contracts (and termination of existing contracts) and could also materially damage our reputation, brand, international expansion efforts, business and operating results. In addition, changes to trade or anti-corruption laws and regulations could affect our operating practices or impose liability on us in a manner that could materially and adversely affect our business, financial condition and results of operations.

Our global business is subject to complex requirements of federal, state, local and foreign laws, regulations, treaties and regulatory authorities as well as industry standard-setting authorities. These requirements are subject to change. Changes in the standards and requirements imposed by these laws, regulations, treaties and authorities or adoption of any new laws, regulations or treaties could negatively affect our ability to serve our customers or our business. In the event that we are unable to meet any existing, new or modified standards when adopted, our business could be adversely affected. Some of the federal, state, local and foreign laws and regulations that affect us include those relating to EHS matters; taxes; antitrust and anti-competition laws; data protection and privacy; advertisement and marketing; labor and employment; import, export and anti-corruption; product liability; product registrations and labeling requirements; and intellectual property. We could be adversely affected by the adoption of global minimum taxes as countries implement the Organization for Economic Co-operation and Development’s (“OECD”) Pillar II regime.

If significant import duties were imposed on the salt we import into the U.S. from our Goderich mine, or if we were unable to include the transfer price of such salt in the cost of goods sold for U.S. tax purposes, our financial condition and operating results would be materially and adversely affected. We could also be adversely impacted by changes in tariffs imposed by countries or other trade protection measures, which could decrease our sales in markets where we sell our products. Certain U.S. states have either enacted or proposed legislation that would provide a preference for their agencies or municipalities to use salt mined in the U.S., their home state or selected states. If such legislation is adopted, it could adversely impact the amount of salt sales contracts awarded to us for salt supplied from our Goderich or Cote Blanche mines in the applicable state. Proposed rulemaking implementing Utah House Bill 513 (now codified as amended Utah Code §65A-6-4) may adversely impact mineral extraction on the Great Salt Lake, including our existing SOP, sodium chloride and magnesium chloride production. Failure to comply with applicable laws, regulations or treaties or to comply with any of contracts we have with governmental entities could preclude us from conducting business with governmental entities and lead to penalties, injunctions, civil remedies or fines. For example, our fire retardant products are subject to extensive government regulation, including the USFS qualification process and laws and regulations relating to the award, administration and performance of U.S. government contracts.

We face exposure to product liability and other claims if our products cause harm, are alleged to have caused harm or have the potential to cause harm to consumers or their property. In addition, our products or products manufactured by our customers using our products could be subject to a product recall as a result of product contamination, our failure to meet product specifications or other causes. For example, our customers use our food-grade salt products in food items they produce, such as cheese and bread, which could be subject to a product recall if our products are contaminated or adulterated. For example, see Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Product Recall”. Similarly, the use and application of our animal feed and plant nutrition products could result in a product recall if it were alleged that they were contaminated. If our fire retardant products fail to provide the intended protection, they could be subject to a product recall or subject us to liability.

A product recall could result in significant losses due to the costs of a recall, the destruction of product inventory and production delays to identify the underlying cause of the recall. We could be held liable for costs related to our customers’ product recall if our products cause the recall or other product liability claims if our products cause harm to our customers or their property. Additionally, a significant product liability case, product recall or failure to meet product specifications could result in adverse publicity, harm to our brand and reputation and significant costs, which could have a material adverse effect on our business and financial performance.

Intellectual property rights, including patents, trademarks, and trade secrets, are a valuable aspect of our business. We attempt to protect our intellectual property rights primarily through a combination of patent, trademark, and trade secret protection. The patent rights that we obtain may not provide meaningful protection to prevent others from selling competitive

products or using similar production processes. Pending patent applications may not result in an issued patent. If we do receive an issued patent, we cannot guarantee that our patent rights will not be challenged, invalidated, circumvented, or rendered unenforceable.

We also rely on trade secret protection to guard confidential unpatented technology, manufacturing expertise, and technological innovation. Although we generally enter into confidentiality agreements with our employees, third-party consultants and advisors to protect our trade secrets, we cannot guarantee that these agreements provide meaningful protection or that adequate remedies will be available in the event of an unauthorized use or disclosure of our trade secrets.

Our brand names and the goodwill associated therewith are an important part of our business. We seek to register our brand names as trademarks where it makes business sense. Our trademark registrations may not prevent our competitors from using similar brand names. Many of our brand names are registered as trademarks in the U.S. and foreign countries. The laws in certain foreign countries in which we do business do not protect trademark rights to the same extent as U.S. law. As a result, these factors could weaken our competitive advantage with respect to our products, services and brands in foreign jurisdictions, which could adversely affect our financial performance.

Our intellectual property rights may not be upheld if challenged. Such claims, if proven, could materially and adversely affect our business and may lead to the impairment of the amounts recorded for goodwill and other intangible assets. If we are unable to maintain the proprietary nature of our technologies, we may lose any competitive advantage provided by our intellectual property. In addition, although any such claims may ultimately prove to be without merit, the necessary management attention to and legal costs associated with defending our intellectual property rights could be significant.

Our success depends, to a significant extent, on successful implementation of our business strategies, including our cost savings initiatives, our continuous improvement initiatives, the successful commercialization of Fortress North America’s fire retardants, and any other strategies described in the “Business” section of this report. We cannot assure that we will be able to successfully implement our strategies or, if successfully implemented, we may not realize the expected benefits of our strategies.

Although we make investments in product innovation, we cannot be certain that we will be able to develop, obtain or successfully implement new products or technologies on a timely basis or that they will be well-received by our customers. Moreover, our investments in new products and technologies involve certain risks and uncertainties and could disrupt our ongoing business. New investments may not generate sufficient revenue, may incur unanticipated liabilities and may divert our limited resources and distract management from our current operations. We cannot be certain that our ongoing investments in new products and technologies will be successful, will meet our expectations and will not adversely affect our reputation, financial condition and operating results.

Our business is dependent on our ability to attract, develop and retain personnel. We may encounter difficulty recruiting sufficient numbers of personnel at acceptable wage and benefit levels due to the competitive labor market. If we are unable to attract, develop and retain the personnel necessary for the efficient operation of our business, this could result in higher costs and decreased productivity and efficiency, which may have a material adverse effect on our performance.

Our business is also dependent on the ability to attract, develop and retain highly skilled personnel. An inability to attract, develop and retain personnel with the necessary skills and experience could result in decreased productivity and efficiency, higher costs, the use of less-qualified personnel and reputational harm, which may have a material adverse effect on our performance.

To help attract, retain and motivate qualified personnel, we use stock-based incentive awards such as restricted stock units and performance stock units. If the value of these stock awards does not appreciate as measured by our common stock price, performance conditions in these awards are not met or if our stock-based compensation otherwise ceases to be viewed as a valuable benefit, our ability to attract, retain and motivate personnel could be weakened, which could harm our business.

The loss of certain key employees could result in the loss of vital institutional knowledge, experience and expertise, damage critical customer relationships and impact our ability to successfully operate our business and execute our business strategy. We may not be able to find qualified replacements for these key positions and the integration of replacements may be disruptive to our business. In addition, the loss of our key employees who have in-depth knowledge of our mining, manufacturing, engineering or research and development processes could lead to increased competition to the extent that those employees are hired by a competitor and are able to recreate our processes or share our confidential information.

We rely on computer systems, information technology and operations technology to conduct our business, including cash management, order entry, invoicing, plant operations, vendor payments, employee salaries and recordkeeping, inventory and asset management, shipping of products, and communication with employees and customers. We also use our systems to analyze and communicate our operating results and other data to internal and external recipients. While we maintain some of our critical computer and information technology systems, we are also dependent on third parties to provide important computer and information technology services. We continue to make updates and improvements to our enterprise resource planning system, network and other core applications, which could impact substantially all of our key processes. Any implementation issues could have adverse effects on our ability to properly capture, process and report financial transactions, distribute our products, invoice and collect from our customers and pay our vendors and could lead to increased expenditures or operational disruptions.

We are susceptible to cyber-attacks, computer viruses and other technological disruptions, which generally continue to increase due to evolving threats and our expanding information technology footprint. We have experienced attempts by unauthorized agents to gain access to our computer systems through the internet, e-mail and other access points. To date, none have resulted in any material adverse impact to our business or operations. While we have programs, policies and procedures in place to identify, prevent and detect any unauthorized access, this does not guarantee that we will be able to detect or prevent unauthorized access to our computer systems. In addition, remote work arrangements for our employees could strain our technology resources and introduce operational risks, including heightened cybersecurity risk. Remote working environments may be less secure and more susceptible to hacking attacks, including phishing and other social engineering attempts. These risks have also impacted, and may in the future impact the third parties on which we rely, and security measures employed by these third parties may also prove to be ineffective at countering threats.

A material failure or interruption of access to our computer systems for an extended period of time or the loss of confidential or proprietary data could adversely affect our operations, reputation and regulatory compliance. While we have mitigation and data recovery plans in place, it is possible that significant expenditures, capital investments and time may be required to correct any of these issues. Additional capital investment and expenditures needed to address, prevent, correct or respond to any of these issues may negatively impact our business, financial condition and results of operations.

The potential impact of climate change on our resources, operations, product demand and the needs of our customers remains uncertain. Scientists have proposed that the impacts of climate change could include changes in rainfall patterns, water shortages, changing sea levels, changes to the water levels of lakes and other bodies of water, changing storm patterns and intensities and changing temperature levels. These changes could be severe and vary by geographic location. These changes could negatively impact customer demand for our products as well as our costs and ability to produce and distribute our products. For example, prolonged period of mild winter weather could reduce the market for deicing products. Drought conditions could similarly impact demand for our plant nutrition products. Climate change could also lead to disruptions in the production or distribution of our products due to major storm events or prolonged adverse conditions, changing temperature levels, lake or river level fluctuations or flooding from sea level changes. See “—The results of our operations are dependent on and vary due to weather conditions. Additionally, adverse weather conditions or significant changes in weather patterns could adversely affect us.” for more information.

In addition, legislative and regulatory measures to address climate change and greenhouse gas emissions (including carbon or emissions taxes) have been enacted and are also in various phases of consideration at both the state and federal level, as well as internationally. These measures could restrict our operations, require us to make capital expenditures to be compliant with these initiatives, increase our costs, impact our ability to compete or negatively impact efforts to obtain permits, licenses and other approvals for existing and new facilities. These measures could also result in increased cost of fuel and other consumables used in our operations or in transporting our products. Our inability to timely respond to the risks posed by climate change and the costs of compliance with climate change laws and regulations could have a material impact on us.

In the future, our business strategy may include supplementing organic growth with acquisitions of and investments in complementary businesses. We may not have acquisition or investment opportunities because we may not identify suitable businesses to acquire or invest in, we compete with other potential buyers and investors, we may not have or be able to obtain suitable financing for an acquisition or investment and we may be hindered by competition and regulatory laws. If we cannot make acquisitions or investments, our business growth may be limited.

Acquisitions of new businesses and investments in businesses (including our acquisition of Fortress) may not perform as expected, may lose value, may not positively impact our financial performance and could increase our debt obligations.

Acquisitions and investments involve significant risks and uncertainties, including diversion of management attention, greater than expected liabilities and expenses, inadequate return on capital and unidentified issues not discovered in our due diligence.

The success of any acquisition will also depend on our ability to successfully combine and integrate the acquired business. We may fail to integrate acquired businesses in a timely and efficient manner. The integration process could result in the loss of key employees, higher than expected costs, ongoing diversion of management attention from other strategic opportunities or operational matters, the disruption of our ongoing businesses or increased risk that our internal controls are found to be ineffective.

Outbreaks of contagious disease, including COVID-19, or other adverse public health developments in the U.S. or worldwide could have a material adverse effect on our business, financial condition and results of operations. For example, the emergence and spread of COVID-19 variants could adversely impact our business and results of operations. Outbreaks of contagious disease, including COVID-19, or other adverse public health developments could affect our business in a number of ways, including but not limited to:

•Disruptions or restrictions on our employees’ ability to work effectively due to illness.

•Temporary closures or disruptions at our facilities or the facilities of our customers or suppliers could reduce demand for our products or affect our ability to timely meet our customer’s orders and negatively impact our supply chain.

•Our mining and manufacturing facilities rely on raw materials and components provided by our suppliers. Outbreaks of contagious disease could cause delays or disruptions in our supply chain and we could experience a mining or manufacturing slow-down or seek to obtain alternate sources of supply, which may not be available or may be more expensive.

•The failure of third parties on which we rely, including our suppliers, customers, contractors, commercial banks, transportation service providers and external business partners, to meet their respective obligations to us, or significant disruptions in their ability to do so, which may be caused by their own financial or operational difficulties, could have an adverse impact on our business, financial condition or results of operations.

The impact of contagious disease or other adverse public health developments could also exacerbate other risks discussed elsewhere in this section of this report, any of which could have a material adverse effect on us.

None.

As digitization and technological advancements continue to accelerate, the landscape of cybersecurity faces new challenges. Compass Minerals remains vigilant in our efforts to minimize risk by safeguarding systems and protecting private business, partner, and customer information. Protection of our digital assets requires strategically focused cybersecurity processes with persistent execution.

We maintain a cybersecurity program employing many components and strategies to mitigate and remediate day-to-day cybersecurity threats and exposures. We approach cybersecurity threats through a cross-functional, multilayered approach, with specific goals of: (i) identifying, preventing and mitigating cybersecurity threats to us; (ii) preserving the confidentiality, security, integrity, and availability of the information that we collect and store to use in our business; (iii) protecting our intellectual property; (iv) maintaining the confidence of our customers, clients and business partners; and (v) providing appropriate public disclosure of cybersecurity risks and incidents when required. Our layered approach to cyber security risk mitigation includes the following:

•Secure architectural solution design of processes and system configuration.

•Assessment and remediation of cybersecurity events with potential impact on business processes.

•Proactive monitoring and mitigation of active exploits through managed services.

•Evolution of the information security governance program.

We take a risk-based approach to cybersecurity, which begins with the identification and evaluation of cybersecurity risks or threats that could affect our operations, finances, legal or regulatory compliance, and/or reputation. We employ continuous monitoring systems and other technologies and security controls to assist us with the identification of cybersecurity risks and threats. These strategies include, among others, the application, adoption or modification of cybersecurity policies and

procedures, implementation of administrative, technical, and/or physical controls and employee training, education, and awareness initiatives.

Our cybersecurity risk management includes continuous monitoring of networks and systems for potential signs of suspicious activity. We have deployed managed detection and response services for all corporate production systems (servers, desktops, and laptops). This managed service includes 24x7x365 monitoring, threat hunting, remediation, and escalation to help maintain a secure environment. We also provide mechanisms and training for employees to report to the IT Department any unusual or potentially malicious activity they observe for proper identification and analysis.

We track key performance indicators and cybersecurity metrics to evaluate the efficacy of our cybersecurity controls and practices. Further, our cybersecurity program is periodically reviewed by senior members of management and adjusted as needed to maintain the program’s agility and responsiveness as circumstances and technologies evolve, new cybersecurity threats emerge, and regulations change.

Cybersecurity represents a critical component of our overall approach to risk management. Our cybersecurity policies, standards and practices are fully integrated into our enterprise risk management (“ERM”) approach, and cybersecurity risks are among the core enterprise risks that are subject to oversight by our Board of Directors (the “Board”). We separately operate an ERM program to identify, evaluate and manage risks. Cybersecurity risks are evaluated alongside other critical business risks under the ERM program to align cybersecurity efforts with our broader business goals and objectives. We believe that integrating cybersecurity risks into our ERM program fosters a proactive and holistic approach to cybersecurity, which helps safeguard our operations, financial condition, and reputation in an ever-evolving threat landscape. Cybersecurity risks are further considered and evaluated as part of an annual risk assessment performed independently by our internal audit department.

We maintain an incident response policy and program focused upon detecting, managing, documenting, and reporting incidents affecting our systems and data, including those specific to cybersecurity. In the event of a significant cybersecurity incident, we establish an incident response team (“IRT”) that works in conjunction our internal crisis management team, subject matter experts, and business stakeholders to identify, contain, eradicate and, if necessary, recover from a cybersecurity incident. We have built into our incident response program, a review process that gives our disclosure committee real-time access to information to rapidly assess materiality. These efforts may include detecting, identifying, defending against, responding to and, if necessary, recovering from cybersecurity incidents. Incidents that meet certain thresholds are escalated to senior members of management, internal legal advisors, communication specialists and other key stakeholders for additional guidance and action.

Through third parties we are also able to rapidly deploy forensic analysis, legal services, notification, and call center service(s). Our incident response and change management policies and procedures were designed based on guidelines from the National Institute of Standards and Technology (“NIST”) Cybersecurity Framework (“CSF”).

Cybersecurity Service Providers and Third-Party Consultants. Periodically we engage independent cybersecurity consultants, auditors and other third parties to assess and enhance our cybersecurity risk assessment and practices. These third parties conduct independent assessments, penetration testing and vulnerability assessments to identify weaknesses and recommend improvements. When cybersecurity risks are identified, we prioritize mitigation strategies based upon risks’ potential impact, likelihood, velocity, and vulnerability, considering both quantitative and qualitative factors. Additionally, we employ several third-party tools and technologies as part of our efforts to enhance cybersecurity functions and monitoring.

Oversight of Third-Party Service Providers. We use third-party service providers to support our operations and many of our technology initiatives, including third parties that house financial or sensitive information. Our technology acquisition policy and our internal controls framework require us to obtain and review attestation reports regarding these third-party service providers and their sub-service processors or providers and their internal controls, complementary user entity controls and contractual obligations, including those specific to cybersecurity. We evaluate cybersecurity risks associated with our use of third-party service providers, which may include a review of a service provider’s cybersecurity posture or a recommendation of specific mitigation controls. We determine and prioritize service provider risk based on potential threat impact and likelihood and these risk determinations determine the level of due diligence and ongoing compliance monitoring required for each service provider. We have independent validation and assessment capabilities from our cyber insurance provider (Resilience). Each year we select several third-party suppliers for evaluation, analyze resultant reports, and mitigate risks associated with the vendor as needed.

As of the date of this report, we have not identified any cybersecurity threats that have materially affected or are reasonably anticipated to have a material effect on the organization. Although we have not previously experienced cybersecurity incidents that are individually, or in the aggregate, material, we have experienced cyberattacks in the past, which we believe have thus far been deflected or mitigated by our preventative, detective, and responsive measures.

Our board level audit committee retains oversight of our cyber security program, which is led by our vice president of information technology services. Our senior leadership regularly provides updates on cybersecurity risks and cyber security initiatives to both the audit committee and the broader board. The Board is responsible for overseeing management’s assessments of major risks facing the Company and for reviewing options to mitigate these risks. The Board’s oversight of cybersecurity risks occurs at both the Board level and through its Audit Committee.

The Board. The Chief Executive Officer, the Chief Financial Officer, other members of senior management and other personnel and advisors, as requested by the Board, report on our financial, operating, and commercial strategies, as well as major related risks, which may include cybersecurity risks, at regularly scheduled meetings of the Board. The Board may request follow-up data and presentations to address any specific concerns or recommendations.

The Audit Committee. The Audit Committee reviews with our management team, including our vice president of information technology services, our cybersecurity frameworks, policies, technologies, programs, opportunities, strategies, and risks. These presentations highlight any significant cybersecurity incidents, the cyber threat landscape, cybersecurity program enhancements, cybersecurity risks, related remediation and mitigation activities, security user awareness and reporting training program and any other relevant cybersecurity topics. In addition, members of our Legal Department advise the Audit Committee as needed regarding cybersecurity-related legal matters, including disclosure requirements. Management believes that these reports help to provide the Audit Committee with an informed understanding of our cybersecurity program, risks, and strategies. The Audit Committee may request follow-up data and presentations to address any specific concerns or recommendations. In addition to this periodic reporting, significant cybersecurity risks or threats may also be escalated to the Audit Committee as needed based upon our cyber incident reporting process. The Audit Committee reports regularly to the entire Board and reviews with the Board any major issues that arise at the committee level, which may include cybersecurity risks.

Our IT Department addresses current and emerging cybersecurity matters. This function is led by our vice president of information technology services, who reports to our Chief Strategy Officer. The IT Department’s security team, a cross-functional group composed of members with substantial professional and technical information technology experience, oversees the cybersecurity program to help ensure the confidentiality, integrity and availability of the company’s systems and mitigate day-to-day threats and exposures. It is responsible for measuring and managing cybersecurity risk, including the prevention, detection, mitigation, and remediation of cybersecurity incidents and for implementing cybersecurity policies, programs, procedures and strategies. The security team reports significant cybersecurity incidents to senior management, internal legal advisors, communication specialists and other key stakeholders as required.

Information concerning our mining properties in this Form 10-K has been prepared in accordance with the requirements of subpart 1300 of Regulation S-K. Subpart 1300 of Regulation S-K requires us to disclose our mineral resources, in addition to our mineral reserves, as of the end of our most recently completed fiscal year both in the aggregate and for each of our individually material mining properties. When evaluating materiality for purposes of the disclosure, the Company considered several quantitative metrics including production, sales and capital expenditure data, as well as synergistic and other qualitative information that the Company believes investors would find important to their investing decisions.

You are cautioned that, except for that portion of mineral resources classified as mineral reserves, mineral resources do not have demonstrated economic value. Inferred mineral resources are estimates based on limited geological evidence and sampling and have a too high of a degree of uncertainty as to their existence to apply relevant technical and economic factors likely to influence the prospects of economic extraction in a manner useful for evaluation of economic viability. Estimates of inferred mineral resources may not be converted to a mineral reserve. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category. A significant amount of exploration must be completed in order to

The Company has determined that the following properties are individually material mining properties for purposes of subpart 1300 of Regulation S-K: the Ogden facility, the Cote Blanche mine and the Goderich mine. The Company has terminated its lithium project and is no longer disclosing mineral resources of lithium or lithium carbonate equivalent, so it is not filing a technical report summary for lithium in connection with this Form 10-K. There have been no material changes in the mineral reserves or mineral resources from the last technical report summaries filed for each of the other properties, so the Company is not filing a new technical report summary for any of these properties in connection with this Form 10-K.

The following map shows the locations of our mining properties, as of September 30, 2024:

As of September 30, 2024, we had ten mining properties, as summarized in the table below:

We are the sole operator of each of our mining properties and we own all of the ownership interests in our mining operations. With respect to most of our mineral properties, we own the land and surface rights and have entered into lease agreements with respect to the mineral rights. Our mineral leases have varying terms. Some will expire after a set term of years, while others continue indefinitely. Many of these leases provide for a royalty payment to the lessor based on a specific amount per ton of minerals extracted or as a percentage of revenue. In addition, we own a number of properties and are party to non-mining leases that permit us to perform activities that are ancillary to our mining operations, such as surface use leases for storage at depots and warehouse leases. We believe that all of our leases were entered into at market terms.

We hold numerous environmental and mineral extraction permits, water rights and other permits, licenses and approvals from governmental authorities authorizing operations at each of our facilities. With respect to each facility at which we produce salt, brine or SOP, permits, licenses and approvals are obtained as needed in the normal course of business based on our mine plans and federal, state, provincial and local regulatory provisions regarding mine permitting and licensing. Based on our historical permitting experience, we expect to be able to continue to obtain necessary mining permits and approvals to support historical rates of production.

The three processing methods we use to produce salt and SOP at our production-stage properties are as follows:

•Underground Rock Salt Mining - We produce most of the salt we sell through underground mining. In North America, we use a combination of continuous mining and drill and blast techniques. At our Winsford, Cheshire, U.K., mine, we utilize continuous mining techniques. Mining machinery moves salt from the salt face to conveyor belts, which transport the salt to the mill center where it is crushed and screened. It is then hoisted to the surface where the processed salt is loaded onto shipping vessels, railcars or trucks. The primary power sources for each of our rock salt mines are electricity and diesel fuel. Rock salt is sold in our highway deicing product lines and for numerous applications in our consumer and industrial product lines.     

•Mechanical Evaporation - Mechanical evaporation involves creating salt-saturated brine from brine wells in underground salt deposits and subjecting this salt-saturated brine to vacuum pressure and heat to precipitate and crystallize salt. The primary power sources used for this process are natural gas and electricity. The resulting product has a high purity and uniform physical shape. Mechanically-evaporated salt is primarily sold through our consumer and industrial salt product lines.

•Solar Evaporation - For a description of the solar evaporation process, see “—Ogden Facility” below.

Our current estimated production capacity is approximately 16.2 million tons of salt and 360,000 tons of SOP per year. The following table shows the estimated annual production capacity and type of salt or other mineral produced at each of our owned or leased processing locations as of September 30, 2024:

(1)Annual production capacity is our estimate of the tons that could be produced based on design capacity, assuming optimization of our operations, including our facilities, equipment and workforce. Incremental equipment, labor or other costs may be required to achieve these production capacity estimates. As we continue our efforts to optimize and refine our production methods, we will update our estimates if necessary.

(2)Solar salts deposited annually substantially exceed the amount converted into finished products. The amount presented here represents an approximate average amount produced based on recent market demand.

(3)The magnesium chloride amount includes both brine and flake.

(4)The annual SOP production capacity at our Ogden facility during normal weather and pond chemistry conditions, which includes amounts produced from both solar-pond based feedstock and supplemental KCl feedstock when economically feasible.

Actual annual salt, magnesium chloride and SOP production volume levels may vary from the annual production capacity shown in the table above due to a number of factors, including variations in the winter weather conditions which impact demand for highway and consumer deicing products, the quality of the reserves and the nature of the geologic formation that we are mining at a particular time, unplanned downtime due to safety concerns, incidents and mechanical failures, and other operating conditions.

The following table shows production by product at our owned and leased production locations, in tons:

(1)Excludes solar salt harvested at our Ogden facility that is not converted into finished product and salt processed at our packaging facilities.

(2)Fiscal year 2023 and 2022 production tons are less than our reserve reduction due to process timing of extracting tons to producing finished product. See Ogden Facility below for additional information regarding our sodium, sodium chloride, magnesium and magnesium chloride reserve estimates at the Ogden facility.

Our production facilities have access to vast mineral deposits. At all of our production locations, we estimate the recoverable reserves to last at least several more decades at current production rates and capacities, although additional capital resources and developmental spending may be required. Our rights to extract those minerals may be contractually limited by geographic boundaries or time. We believe that we will be able to continue extending these agreements, as we have in the past, at commercially reasonable terms without incurring substantial costs or material modifications to the existing lease terms and conditions, thereby allowing us to fully utilize our existing mineral rights.

Our underground mines in Canada (Goderich, Ontario), the U.S. (Cote Blanche, Louisiana) and the U.K. (Winsford, Cheshire) make up 85% of our salt production capacity as of September 30, 2024. Each of these mines is operated with modern mining equipment and utilizes subsurface improvements, such as vertical shaft lift systems, milling and crushing facilities, maintenance and repair shops and extensive raw materials handling systems.

In 2012, we acquired mining rights to approximately 100 million tons of salt resources in the Chilean Atacama Desert. This resource estimate is based upon an initial assessment. A feasibility study would be completed before we decide whether to proceed with the development of this project to ensure the salt resources can be converted into reserves. The development of this project would require significant infrastructure to establish extraction and logistics capabilities. As of September 30, 2024 our investment in these rights totaled $8.5 million.

Summaries of our mineral resources and reserves at the end of fiscal 2024 are set forth in Tables 1 and 2.