Compass Minerals CEO converts 45,466 stock units

Q: How many CMP shares did Edward C. Dowling have withheld?

Edward C. Dowling had 20,097 shares withheld on October 15, 2026, to satisfy tax withholding obligations, reported at $22.59 per share.

Q: How do Edward C. Dowling's restricted stock units vest?

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

The transaction included tax withholding, while the reported restricted-stock-unit balance afterward was 45,467.

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Rhea-AI Filing Summary

Compass Minerals International Inc. (CMP) President and CEO Edward C. Dowling converted 45,466 restricted stock units into 45,466 common shares on October 15, 2026. The transaction table reports 45,467 restricted stock units following the transaction. Dowling had 20,097 shares withheld to satisfy tax withholding obligations, reported at $22.59 per share. Each restricted stock unit represents a contingent right to receive one common share. No Rule 10b5-1 plan is reported.

Insider Trade Summary

45,466 shares exercised/converted

Exercise 4 txns

Insider DOWLING EDWARD C

Role President and CEO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit ^{F3, F4}	45,466	$0.00	$0.00
Exercise	Common Stock	45,466	$0.00	$0.00
Tax Withholding	Common Stock ^F1	20,097	$22.59	$454K
holding	Common Stock ^F2	--	--	--

Holdings After Transaction: Restricted Stock Unit — 45,467 contracts (Direct); Common Stock — 96,512 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. Represents deferred stock units granted by the Issuer in connection with the Reporting Person's service as a director.
F3. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
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

Restricted stock units converted: 45,466 restricted stock units Common shares acquired: 45,466 shares Shares withheld for tax obligations: 20,097 shares +2 more

5 metrics

Restricted stock units converted 45,466 restricted stock units Converted on October 15, 2026

Common shares acquired 45,466 shares Acquired on October 15, 2026

Shares withheld for tax obligations 20,097 shares Withheld on October 15, 2026

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

Restricted stock units following transaction 45,467 restricted stock units Reported following the October 15, 2026 transaction

Key Terms

restricted stock unit, deferred stock units, tax withholding obligations, three equal annual installments

4 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.

deferred stock units financial

"deferred stock units granted by the Issuer in connection with the Reporting Person's service as a director"

Deferred stock units are promises from a company to give an employee shares of stock at a future date, often after certain conditions are met or after leaving the company. They function like a form of delayed compensation, allowing employees to earn shares over time. For investors, they represent potential future ownership in the company, but do not provide immediate voting rights or dividends until the shares are actually received.

tax withholding obligations financial

"shares withheld to satisfy tax withholding obligations"

three equal annual installments financial

"Restricted stock units vest in three equal annual installments"

FAQ

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

How many CMP shares did Edward C. Dowling have withheld?

Edward C. Dowling had 20,097 shares withheld on October 15, 2026, to satisfy tax withholding obligations, reported at $22.59 per share.

How do Edward C. Dowling's restricted stock units vest?

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

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 - 04:40 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^*

DOWLING EDWARD C

(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)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President and CEO

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		45,466	A	$0	111,727	D
Common Stock	10/15/2026		F		20,097⁽¹⁾	D	$22.59	91,630	D
Common Stock⁽²⁾								4,882	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	⁽³⁾	10/15/2026		M			45,466	⁽⁴⁾	10/15/2027	Common Stock	45,467	$0	45,467	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. Represents deferred stock units granted by the Issuer in connection with the Reporting Person's service as a director.

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

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