Compass Minerals Comments on Salt Exclusion from Section 338 Tariffs

Compass Minerals (CMP) states that, effective September 15, 2026, salt and pure sodium chloride produced in Canada are excluded from the 50% ad valorem Section 338 tariffs announced by The White House.

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OVERLAND PARK, Kan.--(BUSINESS WIRE)-- Compass Minerals International, Inc. (NYSE: CMP) (“Compass Minerals” or the “company”) today provided the following comment on the recent announcement by The White House that, effective Sept. 15, 2026, salt and pure sodium chloride produced in Canada are excluded from the 50% ad valorem Section 338 tariffs. The company operates the world’s largest underground salt mine in Goderich, Ontario, serving communities throughout the Northeast and Midwest by helping keep roads, bridges and other transportation infrastructure safe and operational during snow and ice events.

“We are grateful the Trump Administration recognized the critical role our salt products play in public safety and interstate commerce. We would also like to thank U.S. Senator Jerry Moran and others who worked alongside him for their advocacy on behalf of Compass Minerals and our industry.”

About Compass Minerals

Compass Minerals (NYSE: CMP) is a leading global provider of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. The company’s salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial, chemical and agricultural applications. Its plant nutrition products help improve the quality and yield of crops while supporting sustainable agriculture. Compass Minerals operates 11 production and packaging facilities with more than 1,800 employees throughout the U.S., Canada and the U.K. Visit compassminerals.com for more information about the company and its products.

Forward-Looking Statements and Other Disclaimers

This press release may contain forward-looking statements. These statements are based on the Company’s current expectations, estimates and projections and involve risks and uncertainties that could cause the Company’s actual results to differ materially. The differences could be caused by several factors including those factors identified in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of the Company’s Annual and Quarterly Reports on Forms 10-K and 10-Q, including any amendments, as well as the Company’s other SEC filings. Opinions expressed are current opinions as of the date hereof. Investors are cautioned not to place undue reliance on such forward-looking statements and should rely on their own assessment of an investment. The Company undertakes no obligation to update any forward-looking statements made in this press release to reflect future events or developments, except as required by law.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260910722665/en/

Investor Contact
SCR Partners, LLC
Tripp Sullivan
+1.615.942.7077
John Wilfong
+1.312.533.0234
InvestorRelations@compassminerals.com

Media Contact
Kevin Gabriel
Senior Director, Corporate Affairs
+1.913.344.9265
MediaRelations@compassminerals.com

Source: Compass Minerals

Key Terms

ad valorem regulatory

A tax or charge that is calculated as a percentage of the assessed value of an item or transaction, so higher-priced goods or assets pay more than cheaper ones. Think of it like a sales tax that rises with the price of what you buy. Investors care because ad valorem levies change costs, margins and returns on assets, influence pricing decisions and can affect revenue and valuation across industries and trade.

sodium chloride technical

Sodium chloride is a chemical compound made of sodium and chloride ions, commonly known as table salt, used in food seasoning and preservation, industrial processes, chemical manufacturing, and as the key ingredient in medical saline solutions. It matters to investors because its price, supply and purity can affect costs, production and regulatory compliance across food, chemical, pharmaceutical and healthcare companies—like a basic utility input whose availability and cost can influence corporate margins and operations.