[Form 4] COMPASS MINERALS INTERNATIONAL INC Insider Trading Activity

Rhea-AI Filing Summary

Compass Minerals (CMP) director Reece Joseph E received 2,312 deferred stock units on 09/30/2025 at no cash price as compensation for board service, increasing his direct beneficial ownership to 68,067 shares. The filing also shows an indirect holding of 21,000 shares held by a trust. The transaction was reported on Form 4 and signed by an attorney-in-fact on 10/02/2025. The filer notes the units represent deferred stock units granted in connection with director service.

Positive

• Director received 2,312 deferred stock units as compensation, showing continued alignment of director interests with shareholders
• Direct beneficial ownership increased to 68,067 shares, providing transparency on insider holdings
• Filing includes explanatory remark and power of attorney signature, indicating proper procedural disclosure

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine director compensation in deferred stock units, modestly increasing direct holdings; no sale or cash purchase reported.

The Form 4 documents a common governance practice: a board director received 2,312 deferred stock units as compensation, recorded as acquisition (code A) at $0, indicating grant-based compensation rather than a market purchase. Post-transaction direct beneficial ownership is 68,067 shares, with an additional 21,000 shares indirectly held via trust. There are no derivative transactions or dispositions reported. This is a standard disclosure for equity-based director pay and does not show material change to overall ownership or control.

Securities Compliance Analyst

TL;DR: Filing appears complete for the reported grant; signature via power of attorney and clear explanatory remark included.

The Form 4 includes the required elements: reporting person details, issuer symbol (CMP), transaction date (09/30/2025), transaction code (A), quantity (2,312 deferred stock units), and resulting ownership. The explanatory note clarifies the nature of the units as director compensation. The form is signed by an authorized attorney-in-fact on 10/02/2025 and references Exhibit 24 for power of attorney. From a compliance perspective, the disclosure meets Section 16 reporting requirements for this non-derivative grant.

10/02/2025 - 01:50 PM

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

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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^*

Reece Joseph E

(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(1)	09/30/2025		A		2,312	A	$0	68,067	D
Common Stock								21,000	I	By Trust

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 deferred 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 transaction did Reece Joseph E report on Form 4 for CMP?

The Form 4 reports an acquisition on 09/30/2025 of 2,312 deferred stock units granted as director compensation.

How many CMP shares does the reporting person beneficially own after the transaction?

The filing shows 68,067 shares beneficially owned directly after the reported transaction, plus 21,000 indirectly via a trust.

Was any cash price paid for the securities reported on this Form 4?

No cash price was reported; the transaction lists a price of $0, indicating a grant of deferred stock units rather than a purchase.

Does the Form 4 include derivative or option transactions for the reporting person?

No. Table II for derivative securities contains no entries; only non-derivative deferred stock units are reported.

Who signed the Form 4 and when was it filed?

The Form 4 was signed by Deanne Larison by power of attorney on 10/02/2025.