<div><div></div><div>On December 18, 2025, Compass Minerals International, Inc. announced the appointment of Russell Ball, Denise Merle, Mark Roberts, and David Safran to its Board of Directors as part of a board refreshment initiative. The company also announced that Lori Walker, Vance Holtzman, and Shane Wagnon will not stand for reelection at the 2026 Annual Meeting.<div><table><tbody><tr><td>Individual</td><td>Russell Ball</td><td>Denise Merle</td><td>Mark Roberts</td><td>David Safran</td><td>Lori Walker</td><td>Vance Holtzman</td><td>Shane Wagnon</td></tr><tr><td>Role</td><td>Director</td><td>Director</td><td>Director</td><td>Director</td><td>Director</td><td>Director</td><td>Director</td></tr><tr><td>Type of Change</td><td>Appointed</td><td>Appointed</td><td>Appointed</td><td>Appointed</td><td>Not standing for reelection</td><td>Not standing for reelection</td><td>Not standing for reelection</td></tr><tr><td>Effective Date</td><td>Dec 18, 2025</td><td>Dec 18, 2025</td><td>Dec 18, 2025</td><td>Dec 18, 2025</td><td>2026 Annual Meeting</td><td>2026 Annual Meeting</td><td>2026 Annual Meeting</td></tr><tr><td>Reason</td><td>Board refreshment</td><td>Board refreshment</td><td>Board refreshment</td><td>Board refreshment</td><td>No disagreement</td><td>No disagreement</td><td>No disagreement</td></tr><tr><td>Replacement Info</td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td><td>Not disclosed</td><td>Not disclosed</td><td>Not disclosed</td></tr><tr><td>Background Details</td><td>N/A</td><td>N/A</td><td>N/A</td><td>CEO of Innovative Surface Solutions</td><td>N/A</td><td>N/A</td><td>N/A</td></tr><tr><td>Board/Committee Role Changes</td><td>Audit, CAT Committees</td><td>Audit, Compensation, NCG Committees</td><td>EHSS, NCG, CAT Committees</td><td>EHSS, CAT Committees</td><td>Not disclosed</td><td>Not disclosed</td><td>Not disclosed</td></tr></tbody></table></div>Original SEC Filing: COMPASS MINERALS INTERNATIONAL INC [ CMP ] - 8-K - Dec. 18, 2025<section>Disclaimer<div>This is an AI-powered summary. It may contain inaccuracies. Consider verifying important information with the source. Please note this summary is solely based on documents filed with the SEC.</div></section></div></div>

Compass Minerals International announced board appointments of Russell Ball, Denise Merle, Mark Roberts, and David Safran, effective December 18, 2025. Lori Walker, Vance Holtzman, and Shane Wagnon will not stand for reelection at the 2026 Annual Meeting. These changes are part of a board refreshment initiative, with no disagreements reported. The announcement was filed with the SEC on December 18, 2025.

Compass Minerals International Announces Board Appointments and Changes