Edward C. Dowling - Oct 15, 2025 Form 4 Insider Report for COMPASS MINERALS INTERNATIONAL INC (CMP)

Role
President and CEO, Director
Signature
/s/ Deanne Larison, by power of attorney
Stock symbol
CMP
Transactions as of
Oct 15, 2025
Transactions value $
-$296,641
Form type
4
Date filed
10/16/2025, 05:03 PM
Previous filing
Jan 21, 2025
Next filing
Nov 26, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DOWLING EDWARD C President and CEO, Director C/O COMPASS MINERALS INTERNATIONAL, INC., 9900 WEST 109TH STREET, SUITE 100, OVERLAND PARK /s/ Deanne Larison, by power of attorney 2025-10-16 0001210454

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CMP Common Stock Options Exercise $0 +45.5K +221.67% $0.00 66K Oct 15, 2025 Direct
transaction CMP Common Stock Tax liability -$297K -15.2K -23.02% $19.53 50.8K Oct 15, 2025 Direct F1
holding CMP Common Stock 4.88K Oct 15, 2025 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CMP Restricted Stock Unit Options Exercise $0 -45.5K -33.33% $0.00 90.9K Oct 15, 2025 Common Stock 45.5K Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the number of shares withheld to satisfy tax withholding obligations in connection with the vesting and release of the restricted stock units listed in Table II.
F2 Represents deferred stock units granted by the Issuer in connection with the Reporting Person's service as a director.
F3 Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
F4 Restricted stock units vest in three equal annual installments, beginning on October 15, 2025 and ending on October 15, 2027.

Remarks:

Exhibit 24 - Power of Attorney