Compass Minerals director granted 5,032 RSUs

Roberts Mark Lawrence reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Roberts Mark Lawrence reported acquisition or exercise transactions in this Form 4 filing.

Compass Minerals International director Mark Lawrence Roberts received an annual equity grant in the form of restricted stock units. He was awarded 5,032 restricted stock units on March 5, 2026, at no cash cost. According to the grant terms, these units will vest on the earlier of the day immediately preceding the company’s next annual meeting, if that meeting occurs at least 50 weeks after the grant date, or the first anniversary of the grant date. Following this grant, he directly holds 5,032 restricted stock units and 196 shares of common stock.

Insider Trade Summary

Grant/Award: 5,032 shares

Grant/Award 2 txns

Insider Roberts Mark Lawrence

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	5,032	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Unit — 5,032 contracts (Direct); Common Stock — 196 shares (Direct)

Footnotes (1)

1. F1. 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.

FAQ

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What insider transaction did CMP director Mark Lawrence Roberts report on this Form 4?

Mark Lawrence Roberts reported receiving 5,032 restricted stock units as an annual equity grant for his service as a director. The grant was made on March 5, 2026, and involved no cash payment, reflecting standard stock-based compensation rather than an open-market purchase.

When do Mark Lawrence Roberts’ 5,032 CMP restricted stock units vest?

The 5,032 restricted stock units vest on the earlier of the day immediately before Compass Minerals International’s next annual meeting, if held at least 50 weeks after the grant date, or the first anniversary of the March 5, 2026 grant date, aligning vesting with the company’s director service cycle.

How many CMP restricted stock units does Mark Lawrence Roberts hold after this grant?

After the March 5, 2026 grant, Mark Lawrence Roberts directly holds 5,032 restricted stock units. These units represent stock-based compensation for his role as a director and will convert into common shares upon vesting and settlement, subject to the company’s standard plan terms.

How many CMP common shares does Mark Lawrence Roberts directly own following this Form 4?

Following the reported transactions, Mark Lawrence Roberts directly owns 196 shares of Compass Minerals International common stock. This figure is separate from his 5,032 restricted stock units, which are derivative equity awards scheduled to vest according to the specified future vesting conditions.

Was Mark Lawrence Roberts’ CMP restricted stock grant an open-market stock purchase?

No, the 5,032 restricted stock units were granted as annual director compensation, not bought in the open market. The Form 4 uses transaction code "A" for an award or other acquisition, indicating an equity grant at no cash purchase price per share.

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Accepted by SEC EDGAR 03/09/2026 - 04:56 PM Learn about SEC filing dates

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^*

Roberts Mark Lawrence

(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)
03/05/2026

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								196	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	$0	03/05/2026		A		5,032(1)		03/04/2027	03/04/2027	Common Stock	5,032	$0	5,032	D

Explanation of Responses:

1. 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.

Remarks:

	/s/ Deanne Larison, by power of attorney	03/09/2026
	** 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.