Peter Fjellman - 28 Jan 2026 Form 4 Insider Report for COMPASS MINERALS INTERNATIONAL INC (CMP)

Role: Chief Financial Officer
Signature: /s/ Jared Campbell, by power of attorney
Issuer symbol: CMP
Transactions as of: 28 Jan 2026
Net transactions value: -$70,448
Form type: 4
Filing time: 29 Jan 2026, 17:44:45 UTC
Previous filing: 26 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Fjellman Peter	Chief Financial Officer	C/O COMPASS MINERALS INTERNATIONAL, INC., 9900 WEST 109TH STREET, SUITE 100, OVERLAND PARK	/s/ Jared Campbell, by power of attorney	29 Jan 2026	0002054940

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CMP	Common Stock	Options Exercise	$0	+8,321		$0.000000	8,321	28 Jan 2026	Direct
transaction	CMP	Common Stock	Tax liability	$70,448	-2,720	-33%	$25.90	5,601	28 Jan 2026	Direct	F1

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	-8,321	-33%	$0.000000	16,641	28 Jan 2026	Common Stock	8,321		Direct	F2, F3

* 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	Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
F3	Restricted stock units vest in three equal annual installments, beginning on the first anniversary of the grant date and ending on January 28, 2028.