Compass Minerals shareholders elect directors and approve executive compensation, incentive plan, and auditor

Proposal 4 — The Company’s stockholders ratified the appointment of KPMG LLP as the Company’s independent registered public accounting firm for fiscal 2024. For Against Abstain Broker Non-Votes 37,299,573 137,119 57,122 —

Proposal 2 — The Company’s stockholders approved, on a non-binding, advisory basis, the compensation of the Company’s named executive officers, as set forth in the Company’s Proxy Statement filed with the Securities Exchange Commission on January 29, 2024 (the “Proxy Statement”). For Against Abstain Broker Non-Votes 31,959,799 2,018,276 87,695 3,428,044

Proposal 3 — The Company’s stockholders approved an amendment to the Compass Minerals International, Inc. 2020 Incentive Award Plan, as set forth in the Proxy Statement. For Against Abstain Broker Non-Votes 31,763,035 2,083,483 219,252 3,428,044

Proposal 1 — The individuals listed below were elected by the Company’s stockholders to serve as directors of the Company until the next annual meeting of stockholders, or until a successor is duly elected and qualified or his or her earlier death, resignation or removal. Director For Against Abstain Broker Non-Votes Richard P. Dealy 32,286,633 1,660,450 118,687 3,428,044 Edward C. Dowling, Jr. 32,084,995 1,862,273 118,502 3,428,044 Vance O. Holtzman 30,520,783 3,416,004 128,983 3,428,044 Gareth T. Joyce 32,093,894 1,852,927 118,949 3,428,044 Melissa M. Miller 30,432,388 3,516,651 116,731 3,428,044 Joseph E. Reece 32,883,928 1,063,195 118,647 3,428,044 Shane T. Wagnon 31,798,714 2,147,391 119,665 3,428,044 Lori A. Walker 32,855,044 1,092,955 117,771 3,428,044