[Form 4] COMPASS MINERALS INTERNATIONAL INC Insider Trading Activity

Rhea-AI Filing Summary

Joyce Gareth T, a director of Compass Minerals International, Inc. (CMP), reported a grant of 1,433 common stock units on 09/30/2025 issued as director compensation. The units were granted at a $0 purchase price and increased her beneficial ownership to 29,812 shares. The Form 4 was filed with a power of attorney signature on 10/02/2025. The filing expressly states the units represent common stock units granted for her service as a director and includes an Exhibit 24 power of attorney.

Positive

• Director equity alignment: Joyce Gareth T received 1,433 common stock units, aligning her interests with shareholders
• Transparent disclosure: Transaction reported on Form 4 with an Exhibit 24 power of attorney and signature date

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine director compensation grant; standard equity award that modestly increases director ownership, not a material corporate change.

The report documents a customary equity grant to a board member for director services. The amount, 1,433 units, is disclosed as granted at no cash cost to the reporting person and raises beneficial ownership to 29,812 shares. This is consistent with routine compensation practices and does not indicate a change in control, related-party transaction beyond typical director remuneration, or any extraordinary corporate action. The presence of a power of attorney signature is a standard administrative detail.

Securities Analyst

TL;DR: Insider transaction shows non-cash director award; immaterial for valuation but relevant for ownership disclosure.

The Form 4 records a non-derivative acquisition coded as an award (code A) of 1,433 common stock units granted on 09/30/2025 at a reported price of $0. The post-transaction beneficial ownership is disclosed as 29,812 shares. For investors, this is a transparency item affecting share count at the individual level; it is unlikely to have material impact on company valuation or liquidity given the size relative to typical public-company float.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Joyce Gareth T

(Last) (First) (Middle)

C/O COMPASS MINERALS INTERNATIONAL, INC.

9900 WEST 109TH STREET, SUITE 100

(Street)

OVERLAND PARK KS 66210

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
COMPASS MINERALS INTERNATIONAL INC [ CMP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/30/2025		A		1,433(1)	A	$0	29,812	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents common stock units granted by the Issuer in connection with the Reporting Person's service as a director.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Deanne Larison, by power of attorney	10/02/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Joyce Gareth T report on the CMP Form 4?

She reported a grant of 1,433 common stock units on 09/30/2025 issued as director compensation.

Did the Form 4 show any purchase price for the awarded units?

The units were granted at a reported price of $0.

How many shares does Joyce Gareth T beneficially own after the transaction?

The Form 4 shows 29,812 shares beneficially owned following the reported transaction.

When was the Form 4 filed and who signed it?

The filing includes a power of attorney signature dated 10/02/2025 signed by Deanne Larison on behalf of the reporting person.

What is the nature of the award reported on the Form 4?

The filing states the units represent common stock units granted in connection with the reporting person’s service as a director.