Form 4 Filing for Nichols Benjamin S.

This filing details transactions made by Nichols Benjamin S., Chief Commercial Officer of COMPASS MINERALS INTERNATIONAL INC. On June 24, 2026, 2,542 units of Restricted Stock were acquired, with a post-transaction share count of 2,542. This was followed by the disposal of 747 shares of Common Stock, acquired via the vesting of Restricted Stock Units, with a price per share of $28.66. The shares were withheld to cover tax obligations. Additionally, Nichols Benjamin S. holds 249 shares of Common Stock through a 401(k) Plan. The total post-transaction shares of Common Stock held directly amount to 15,988.