Compass Minerals (CMP) director granted common shares and 1,348 RSUs

Rhea-AI Filing Summary

Compass Minerals International director Mark Lawrence Roberts reported stock-based compensation for his board service. On December 31, 2025, he received 196 shares of common stock at $0 per share, leaving him with 196 directly owned common shares. On December 18, 2025, he was granted 1,348 restricted stock units at $0, which are scheduled to vest on December 18, 2026, reflecting his annual equity award as a director.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Roberts Mark Lawrence

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	196	$0.00	--
Grant/Award	Restricted Stock Unit	1,348	$0.00	--

Holdings After Transaction: Common Stock — 196 shares (Direct); Restricted Stock Unit — 1,348 shares (Direct)

Footnotes (1)

1. Represents common stock units granted by the Issuer in connection with the Reporting Person's service as a director. Represents annual grant of restricted stock units in connection with the Reporting Person's service as a director, which will vest on the first anniversary of the grant date.

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^*

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)
12/18/2025

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	12/31/2025		A		196(1)	A	$0	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	12/18/2025		A		1,348(2)		12/18/2026	12/18/2026	Common Stock	1,348	$0	1,348	D

Explanation of Responses:

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

2. Represents annual grant of restricted stock units in connection with the Reporting Person's service as a director, which will vest on the first anniversary of the grant date.

Remarks:

	/s/ Deanne Larison, by power of attorney	01/29/2026
	** 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.

FAQ

What insider transactions did CMP director Mark Lawrence Roberts report?

Mark Lawrence Roberts reported receiving 196 Compass Minerals common shares and 1,348 restricted stock units as compensation. The common stock was credited on December 31, 2025, while the restricted units were granted December 18, 2025 under his annual director equity award.

How many Compass Minerals (CMP) shares does Mark Lawrence Roberts now hold directly?

After the reported transaction, Mark Lawrence Roberts directly holds 196 shares of Compass Minerals common stock. These shares were received as stock units granted for his service as a director and converted at no cash cost to him on December 31, 2025.

What are the terms of Mark Lawrence Roberts’ restricted stock unit grant at CMP?

Roberts was granted 1,348 Compass Minerals restricted stock units on December 18, 2025 as his annual director award. These units vest on the first anniversary of the grant date, December 18, 2026, aligning his compensation with continued board service over that one-year period.

Was there any cash consideration for Mark Lawrence Roberts’ CMP stock and RSU awards?

No cash changed hands for these awards; both the 196 common shares and 1,348 restricted stock units were issued at a stated price of $0. They represent equity compensation for his role as a director rather than open-market purchases funded with personal cash.

Is Mark Lawrence Roberts’ Form 4 transaction at Compass Minerals a purchase or a grant?

The Form 4 reflects equity grants, not market purchases. Roberts received 196 common shares and 1,348 restricted stock units as part of his director compensation program, with the filing footnotes clarifying that these awards relate specifically to his service on the company’s board.

When will Mark Lawrence Roberts’ Compass Minerals restricted stock units vest?

His 1,348 restricted stock units are scheduled to vest on December 18, 2026. This is exactly one year after the grant date of December 18, 2025, consistent with the company’s description of the award as an annual director grant tied to ongoing board service.