COMPASS MINERALS 2025 SUSTAINABILITY REPORT

Compass Minerals is a leading global provider of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for our customers and communities. Through the responsible transformation of Earth’s natural resources, we deliver products that help keep people safe, feed the world and enrich lives. That is our Core Purpose, and we take great pride in fulfilling it.

Fiscal 2025 Sustainability Report

Our latest report highlights our commitment to addressing and managing the sustainability issues of greatest importance to our company and stakeholders. The Fiscal 2025 Sustainability Report details our progress toward our previously announced fiscal 2025 ESG goals and targets. These environmental, social and governance (ESG) goals, and the targets that served as milestones toward achieving them, span the key focus areas of Workforce, Products, Communities and Environment. At the end of fiscal 2025, we achieved nine targets and did not achieve four targets. Regardless, and more importantly, we continue to take steps forward — learning, improving and adapting.

Fiscal 2025 Sustainability Highlights

Learn more about our company’s programs, initiatives and successes from our efforts this past year by viewing the full report. Fiscal 2025 highlights include:

Strengthening fatal risk management safety standards: In our commitment to zero harm, we updated and enhanced our fatal risk management program. Across multiple sites, we invited employees ranging from frontline operators to mine leadership to determine the critical controls and actions required to effectively eliminate fatal risks. The objective is to increase awareness and understanding regarding fatal risks, and provide the tools and support for employees to be proactive and vigilant to mitigate fatal risks each time, every time. Additionally, 40,000 hours of environmental, health, safety and sustainability training was completed by our employees.

Focusing on employee inclusion and belonging: We strive to create a safe and inclusive work environment that emphasizes employee well-being, empowerment and career growth. We’re proud of our 90% voluntary retention rate for employees and that our companywide female-to-male pay ratio is 101%.

Ensuring customer transparency: We want customers to have critical information on our company’s products — and 100% of Compass Minerals-branded consumer packaged products now have ingredient labeling and packaging end-of-use instructions. We have continued our partnership with How2Recycle^® to implement a consistent and transparent labeling program that provides clear end-of-use instructions on Compass Minerals-branded consumer packaged products.

Engaging suppliers: Over the past three years, we have cumulatively engaged approximately 350 suppliers totaling over 80% of addressable spend on an ESG supplier scorecard. The scorecard includes questions regarding topics such as greenhouse gas emissions, waste and freshwater management, human rights, diversity and inclusion, community engagement and ethics.

Driving positive change in our communities: We donated more than $350,000 through Compass Minerals Cares and continue to align our philanthropic contributions with the United Nations Sustainable Development Goals. Making a positive impact in the communities where we operate is important to our company and 100% of our operating sites were actively engaged through charitable giving, company‑sponsored volunteer activities and supporting organizations focused on local economic development, workforce training and/or educational opportunities.

Continuing our commitment to environmental stewardship: Our combined Scopes 1 and 2 GHG emissions declined 12% and freshwater withdrawal declined 30%, respectively, compared to our fiscal 2021 baseline.

Our Sustainability Strategy

We approach our sustainability work through a fundamental commitment to four key pillars: safety, growth, transparency and stewardship. Together, these pillars form our sustainability compass, guiding our decisions and business practices across all aspects of our company.

Safety: Striving toward zero harm, our highest priority is ensuring the health and safety of our employees and the communities in which we operate.

Growth: We work to enable sustainable, profitable growth by maximizing the value and efficiency of our production assets, investing in our people, driving innovation and exceeding customer expectations.

Transparency: Firmly committed to a culture of trust, transparency and accountability, we seek open and honest communication with our stakeholders, while showing respect for diversity in all its forms.

Stewardship: We honor our responsibility to serve as good stewards of the natural resources we rely on to produce, manufacture and market essential mineral products, minimize the impact we have on our environment, and recognize the markets we serve may be impacted by a changing climate.

Questions and feedback on our sustainability strategy and reporting are welcome. Contact us at sustainability@compassminerals.com.