Joseph E. Reece - 05 Mar 2026 Form 4 Insider Report for COMPASS MINERALS INTERNATIONAL INC (CMP)

Role: Director
Signature: /s/ Deanne Larison, by power of attorney
Issuer symbol: CMP
Transactions as of: 05 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 09 Mar 2026, 18:14:59 UTC
Previous filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Reece Joseph E	Director	C/O COMPASS MINERALS INTERNATIONAL, INC., 9900 WEST 109TH STREET, SUITE 100, OVERLAND PARK	/s/ Deanne Larison, by power of attorney	09 Mar 2026	0001659413

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CMP	Common Stock	Options Exercise		+22,322	+32%	$0.000000^*	92,649	05 Mar 2026	Direct	F1
holding	CMP	Common Stock						21,000	05 Mar 2026	By Trust

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	Deferred Stock Units	Options Exercise		-22,322	-100%	$0.000000^*	0	05 Mar 2026	Common Stock	22,322	$0.000000	Direct
transaction	CMP	Deferred Stock Units	Award		+9,434		$0.000000^*	9,434	05 Mar 2026	Common Stock	9,434	$0.000000	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents deferred stock units granted by the Issuer in connection with the Reporting Person's service as a director.
F2	Represents annual grant of restricted stock units in connection with the Reporting Person's service as a director, which will vest on the earlier of (a) the day immediately preceding the Issuer's next annual meeting (as long as the meeting is held at least 50 weeks from the grant date) and (b) the first anniversary of the grant date.