Form 4 Filing for Brandon Risner at Compass Minerals International Inc.

This filing details stock transactions by Brandon Risner, Chief Operating Officer of Compass Minerals International Inc. On October 15, 2026, Risner acquired 5,245 shares of common stock with a transaction price of $0.00. In a separate transaction on the same date, 1,465 shares were disposed of at a price of $22.59 per share, leaving a post-transaction balance of 3,780 shares. The filing also reports the disposition of 803 Restricted Stock Units (RSUs) with a transaction value of $0.00, leaving 0 shares. Additionally, 4,442 RSUs were disposed of, also with a transaction value of $0.00, resulting in 4,443 shares remaining. Footnote F1 clarifies that shares were withheld to cover tax obligations related to the vesting and release of RSUs. Footnote F2 states that each RSU represents a contingent right to one share of common stock. Footnote F3 indicates that certain RSUs vest in three equal installments, with the final vesting on October 15, 2026. Footnote F4 notes that other RSUs vest over three years, concluding on October 15, 2027.