Compass Minerals (NYSE: CMP) CCO records RSU vesting and tax withholding

Rhea-AI Filing Summary

Compass Minerals International chief commercial officer Benjamin S. Nichols reported routine equity compensation activity involving restricted stock units and related tax withholding. On May 13, 2026, 737 restricted stock units were converted into 737 shares of common stock at a conversion price of $0.0000 per share. Of these, 247 shares were withheld at $30.2100 per share to satisfy tax withholding obligations tied to the RSU vesting. After these transactions, Nichols held 13,703 shares of common stock directly, plus 249 shares indirectly through a 401(k) plan based on a statement dated as of October 31, 2025. He also reported 1,473 restricted stock units outstanding, which vest in three equal installments ending on May 13, 2028.

Insights

Equity compensation analyst

Routine RSU vesting with shares withheld for taxes, no open-market trading.

Chief commercial officer Benjamin S. Nichols had 737 restricted stock units convert into common stock, a standard step as equity awards vest. The Form 4 shows this as a derivative exercise (code M) paired with a tax-related share disposition (code F).

To cover tax obligations from the vesting, 247 shares were withheld at $30.2100 per share rather than sold in the open market. Following the transactions, Nichols directly owns 13,703 common shares, plus 249 shares indirectly via a 401(k) plan, and holds 1,473 remaining restricted stock units scheduled to vest in three equal installments through May 13, 2028.

Insider Trade Summary

737 shares exercised/converted

Mixed 4 txns

Insider Nichols Benjamin S.

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	737	$0.00	--
Exercise	Common Stock	737	$0.00	--
Tax Withholding	Common Stock	247	$30.21	$7K
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Unit — 1,473 shares (Direct, null); Common Stock — 13,950 shares (Direct, null); Common Stock — 249 shares (Indirect, 401(k) Plan)

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. The reported number is based on a 401(k) plan statement dated as of October 31, 2025. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. The restricted stock units vest in three equal installments, beginning on the first anniversary of the grant date and ending on May 13, 2028.

Key Figures

RSUs converted: 737 shares Shares withheld for taxes: 247 shares Tax withholding price: $30.2100 per share +4 more

7 metrics

RSUs converted 737 shares Restricted stock units converted to common stock on May 13, 2026

Shares withheld for taxes 247 shares Withheld to satisfy tax obligations at $30.2100 per share

Tax withholding price $30.2100 per share Value used for shares withheld to cover tax liability

Direct common shares after transaction 13,703 shares Direct CMP common stock holdings following Form 4 transactions

Indirect 401(k) holdings 249 shares CMP common stock via 401(k) plan as of October 31, 2025

Remaining RSU balance 1,473 units Restricted stock units outstanding after conversion and vesting activity

RSU expiration date May 13, 2028 End date for RSU vesting schedule reported in Form 4

Key Terms

Restricted Stock Unit, tax withholding obligations, 401(k) plan, derivative security

4 terms

Restricted Stock Unit financial

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

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

"Represents the number of shares withheld to satisfy tax withholding obligations in connection with the vesting and release of the restricted stock units"

401(k) plan financial

"The reported number is based on a 401(k) plan statement dated as of October 31, 2025."

A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.

derivative security financial

"Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

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^*

Nichols Benjamin S.

(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 Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/13/2026		M		737	A	$0	13,950	D
Common Stock	05/13/2026		F		247(1)	D	$30.21	13,703	D
Common Stock								249(2)	I	401(k) Plan

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	(3)	05/13/2026		M			737	(4)	05/13/2028	Common Stock	737	$0	1,473	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. The reported number is based on a 401(k) plan statement dated as of October 31, 2025.

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

4. The restricted stock units vest in three equal installments, beginning on the first anniversary of the grant date and ending on May 13, 2028.

Remarks:

	/s/ Jared Campbell, by power of attorney	05/14/2026
	** 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)