Compass Minerals officer exercises RSUs, covers taxes

Compass Minerals International Chief Commercial Officer Benjamin S. Nichols reported routine equity compensation activity involving restricted stock units.

Rhea-AI Filing Summary

Compass Minerals International Chief Commercial Officer Benjamin S. Nichols reported routine equity compensation activity involving restricted stock units. On May 18, 2026, 685 restricted stock units converted into 685 shares of common stock, reflecting vesting of prior awards.

Of these, 195 shares were withheld to cover tax withholding obligations at a price of $28.97 per share, with no open-market sale. Following these transactions, Nichols holds 14,193 shares of common stock directly and 249 shares indirectly through a 401(k) plan.

Insider Trade Summary

685 shares exercised/converted

Exercise 4 txns

Insider Nichols Benjamin S.

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	685	$0.00	$0.00
Exercise	Common Stock	685	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	195	$28.97	$6K
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Unit — 0 contracts (Direct); Common Stock — 14,193 shares (Direct); Common Stock — 249 shares (Indirect, 401(k) Plan)

Footnotes (4)

1. 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.
2. F2. The reported number is based on a 401(k) plan statement dated as of October 31, 2025.
3. F3. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.
4. F4. The restricted stock units vest in three equal installments, beginning on the first anniversary of the grant date and ending on May 18, 2026.

Key Figures

RSUs converted: 685 shares Shares withheld for taxes: 195 shares at $28.97 Direct holdings after transaction: 14,193 shares +3 more

6 metrics

RSUs converted 685 shares Restricted stock units converting into common stock on May 18, 2026

Shares withheld for taxes 195 shares at $28.97 Stock retained to satisfy tax withholding obligations

Direct holdings after transaction 14,193 shares CMP common stock held directly by Nichols after Form 4 transactions

Indirect 401(k) holdings 249 shares CMP shares in 401(k) plan based on October 31, 2025 statement

Tax-withholding disposition code Code F Shares delivered to satisfy tax liability on RSU vesting

Derivative exercise code Code M Exercise/conversion of restricted stock units into common shares

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.

FAQ

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

What insider transactions did CMP executive Benjamin S. Nichols report?

Benjamin S. Nichols reported vesting of 685 restricted stock units that converted into common shares. Of these, 195 shares were withheld to satisfy tax obligations, and he now directly holds 14,193 CMP common shares after the transactions.

Were Benjamin S. Nichols’ CMP share movements open-market buys or sells?

Nichols’ reported activity was not open-market trading. It reflects restricted stock units vesting into 685 shares and 195 shares withheld to cover taxes, a standard compensation-related mechanism rather than discretionary purchases or sales in the market.

How many CMP shares does Benjamin S. Nichols own after this Form 4?

After these transactions, Nichols directly owns 14,193 shares of CMP common stock. He also has an indirect position of 249 CMP shares held through a 401(k) plan, based on a plan statement dated October 31, 2025, as disclosed.

What does the 195-share tax withholding in the CMP Form 4 mean?

The 195 CMP shares represent stock withheld to pay taxes on vesting restricted stock units. Instead of Nichols paying cash, the company retained shares at $28.97 per share to satisfy tax obligations, which is not treated as an open-market sale transaction.

What is the role of restricted stock units in CMP executive compensation?

Each restricted stock unit represents a contingent right to receive one CMP common share. The units vest in three equal installments, beginning on the first anniversary of the grant date and ending on May 18, 2026, aligning compensation with long-term share ownership.

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

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Accepted by SEC EDGAR 05/19/2026 - 04:52 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^*

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)
05/18/2026

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	05/18/2026		M		685	A	$0	14,388	D
Common Stock	05/18/2026		F		195(1)	D	$28.97	14,193	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)	05/18/2026		M			685	(4)	05/18/2026	Common Stock	685	$0	0	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 18, 2026.

Remarks:

	/s/ Jared Campbell, by power of attorney	05/19/2026
	** 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)