CMP CAO nets 1,835 shares after 2,598 RSUs vest and tax withholding

Rhea-AI Filing Summary

Compass Minerals International (CMP) reported an insider equity transaction by its Chief Accounting Officer on 10/15/2025. The officer’s restricted stock units converted to 2,598 shares of common stock at $0 per share (Code M). To cover taxes upon vesting, 763 shares were withheld at $19.53 (Code F), leaving 1,835 shares directly owned after the transactions.

Each RSU equals one share of common stock, and the award vests in three equal annual installments from October 15, 2025 through October 15, 2027. Following these transactions, the reporting person holds 5,196 restricted stock units as derivative securities.

Insider Trade Summary

2,598 shares exercised/converted

Mixed 3 txns

Insider Ward Ashley

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	2,598	$0.00	--
Exercise	Common Stock	2,598	$0.00	--
Tax Withholding	Common Stock	763	$19.53	$15K

Holdings After Transaction: Restricted Stock Unit — 5,196 shares (Direct); Common Stock — 2,598 shares (Direct)

Footnotes (1)

1. 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. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. Restricted stock units vest in three equal annual installments, beginning on October 15, 2025 and ending on October 15, 2027.

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Ward Ashley

(Last) (First) (Middle)

C/O COMPASS MINERALS

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)

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

3. Date of Earliest Transaction (Month/Day/Year)
10/15/2025

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	10/15/2025		M		2,598	A	$0	2,598	D
Common Stock	10/15/2025		F		763(1)	D	$19.53	1,835	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
Restricted Stock Unit	(2)	10/15/2025		M			2,598	(3)	10/15/2027	Common Stock	2,598	$0	5,196	D

Explanation of Responses:

1. 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.

2. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

3. Restricted stock units vest in three equal annual installments, beginning on October 15, 2025 and ending on October 15, 2027.

Remarks:

	/s/ Jared Campbell, by power of attorney	10/16/2025
	** 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 CMP’s officer report on Form 4?

Vesting of 2,598 restricted stock units into common shares (Code M) and withholding of 763 shares for taxes at $19.53 (Code F).

How many CMP shares does the officer own after the transactions?

The officer directly owns 1,835 shares after the reported transactions.

What price was used for the tax withholding on CMP shares?

Shares were withheld at $19.53 to satisfy tax obligations related to vesting.

How do the CMP RSUs vest for this award?

They vest in three equal annual installments from October 15, 2025 to October 15, 2027.

How many CMP RSUs remain held by the officer?

Following the transactions, the officer holds 5,196 restricted stock units.

What do the Form 4 transaction codes mean?

M indicates an RSU conversion to shares; F indicates shares withheld to cover taxes upon vesting.