Compass Minerals COO acquires 5,245 common shares

Q: How many CMP shares did Brandon Risner acquire?

Brandon Risner acquired 5,245 common shares on October 15, 2026. The report also lists restricted stock unit conversion/disposition entries covering 803 and 4,442 underlying common shares.

Q: How many CMP shares were withheld for taxes, and at what price?

1,465 common shares were withheld to satisfy tax withholding obligations connected with restricted stock unit vesting and release, at a reported $22.59 per share.

The entries include 5,245 common shares acquired and 1,465 shares withheld for tax obligations at $22.59 per share.

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Rhea-AI Filing Summary

Compass Minerals International Inc. Chief Operating Officer Brandon Risner reported common stock acquisition and restricted stock unit conversions on October 15, 2026. The report lists 5,245 common shares acquired and restricted stock unit conversion/disposition entries covering 803 and 4,442 underlying common shares. Each unit represents a contingent right to receive one common share. The associated vesting schedules provide for three equal installments, beginning on the first anniversary of grant and ending on October 15, 2026 and October 15, 2027, respectively.

Risner also had 1,465 shares withheld to satisfy tax withholding obligations connected with RSU vesting and release, at a reported $22.59 per share. No Rule 10b5-1 plan is reported.

Insider Trade Summary

5,245 shares exercised/converted

Exercise 4 txns

Insider Risner Brandon

Role Chief Operating Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit ^{F2, F3}	803	$0.00	$0.00
Exercise	Restricted Stock Unit ^{F2, F4}	4,442	$0.00	$0.00
Exercise	Common Stock	5,245	$0.00	$0.00
Tax Withholding	Common Stock ^F1	1,465	$22.59	$33K

Holdings After Transaction: Restricted Stock Unit — 4,443 contracts (Direct); Common Stock — 3,780 shares (Direct)

Footnotes (4)

F1. 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.
F2. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
F3. Restricted stock unit vests in three equal installments, beginning on the first anniversary of the grant date and ending on October 15, 2026.
F4. Restricted stock units vest in three equal annual installments, beginning on the first anniversary of the grant date and ending on October 15, 2027

Key Figures

Common shares acquired: 5,245 shares Restricted stock units: 803 units Restricted stock units: 4,442 units +2 more

5 metrics

Common shares acquired 5,245 shares October 15, 2026

Restricted stock units 803 units Conversion/disposition entry dated October 15, 2026; vesting schedule ends October 15, 2026

Restricted stock units 4,442 units Conversion/disposition entry dated October 15, 2026; vesting schedule ends October 15, 2027

Shares withheld for tax withholding obligations 1,465 shares October 15, 2026

Reported price for shares withheld $22.59 per share October 15, 2026

Key Terms

restricted stock unit, tax withholding obligations, contingent right

3 terms

restricted stock unit financial

"Each restricted stock unit represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

tax withholding obligations financial

"withheld to satisfy tax withholding obligations"

contingent right financial

"a contingent right to receive one share of Issuer common stock"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many CMP shares did Brandon Risner acquire?

Brandon Risner acquired 5,245 common shares on October 15, 2026. The report also lists restricted stock unit conversion/disposition entries covering 803 and 4,442 underlying common shares.

How many CMP shares were withheld for taxes, and at what price?

1,465 common shares were withheld to satisfy tax withholding obligations connected with restricted stock unit vesting and release, at a reported $22.59 per share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/19/2026 - 04:40 PM EDT Accepted by SEC EDGAR 10/19/2026 - 04:39 PM EDT

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^*

Risner Brandon

(Last)

(First)

(Middle)

C/O COMPASS MINERALS INTERNATIONAL, INC.

9900 WEST 109TH STREET, SUITE 100

(Street)

OVERLAND PARK

KANSAS

66210

(City)

(State)

(Zip)

UNITED STATES

(Country)

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 Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/15/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	10/15/2026		M		5,245	A	$0	5,245	D
Common Stock	10/15/2026		F		1,465⁽¹⁾	D	$22.59	3,780	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Unit	⁽²⁾	10/15/2026		M			803	⁽³⁾	10/15/2026	Common Stock	803	$0	0	D
Restricted Stock Unit	⁽²⁾	10/15/2026		M			4,442	⁽⁴⁾	10/15/2027	Common Stock	4,442	$0	4,443	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 unit vests in three equal installments, beginning on the first anniversary of the grant date and ending on October 15, 2026.

4. Restricted stock units vest in three equal annual installments, beginning on the first anniversary of the grant date and ending on October 15, 2027

Remarks:

	/s/ Jared Campbell, by power of attorney	10/19/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR