Compass Minerals Comments on Salt Exclusion from Section 338 Tariffs

The White House announced that, effective Sept. 15, 2026, salt and pure sodium chloride produced in Canada are excluded from the 50% ad valorem Section 338 tariffs, and Compass Minerals (NYSE: CMP) publicly confirmed the exemption. Compass operates the world's largest underground salt mine in Goderich, Ontario, supplying deicing salt to communities throughout the U.S. Northeast and Midwest, so the exclusion shields the company's core winter product from a potentially massive tariff cost.

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