Atmus (ATMU) CEO Disher reports tax-withholding share dispositions on vested awards

Rhea-AI Filing Summary

Atmus Filtration Technologies director and Chief Executive Officer Stephanie Disher reported tax-related share dispositions in company common stock. On February 27, 2026, shares were withheld in two transactions, covering 66,639 and 15,854 shares at $64.53 per share to satisfy tax withholding obligations on vested performance and restricted share units from the 2023-2025 grant cycle. After these withholdings, Disher directly held 357,184 common shares, indicating the transactions were administrative tax settlements rather than open-market sales.

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

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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^*

Disher Stephanie

(Last) (First) (Middle)

26 CENTURY BOULEVARD

(Street)

NASHVILLE TN 37214

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Atmus Filtration Technologies Inc. [ ATMU ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026

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(1)	02/27/2026		F		66,639	D	$64.53	373,038	D
Common Stock(2)	02/27/2026		F		15,854	D	$64.53	357,184	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

Explanation of Responses:

1. Reflects shares withheld upon vesting of Performance Share Units earned during the 2023-2025 grant cycle to pay reporting person's tax withholding obligation.

2. Reflects shares withheld upon vesting of the Restricted Share Units granted during the 2023-2025 grant cycle to pay reporting person's tax withholding obligation.

Remarks:

	/s/Tiffany B. Williams, Attorney-in-Fact for Stephanie Disher	03/03/2026
	** 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).
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FAQ

What insider transactions did Atmus Filtration (ATMU) report for Stephanie Disher?

Atmus Filtration reported that CEO Stephanie Disher had shares withheld to cover tax obligations. Two transactions on February 27, 2026 involved company common stock tied to vested performance and restricted share units from the 2023-2025 grant cycle.

Were Stephanie Disher’s Atmus (ATMU) transactions open-market sales?

No, the transactions were not open-market sales. The Form 4 shows code F tax-withholding dispositions, meaning shares were withheld by the company to pay Disher’s tax obligations upon vesting of equity awards granted for the 2023-2025 period.

How many Atmus (ATMU) shares were withheld for Stephanie Disher’s taxes?

Two tax-withholding dispositions occurred: 66,639 shares and 15,854 shares of common stock. Both were valued at $64.53 per share and related to vested performance share units and restricted share units from the 2023-2025 grant cycle.

How many Atmus (ATMU) shares does Stephanie Disher own after these transactions?

After the reported tax-withholding transactions, Stephanie Disher directly owned 357,184 shares of Atmus common stock. This figure reflects her holdings following the share withholdings associated with vesting of long-term incentive awards from the 2023-2025 grant cycle.

What do the footnotes in the Atmus (ATMU) Form 4 disclose about these transactions?

The footnotes explain that the shares were withheld upon vesting of performance share units and restricted share units from the 2023-2025 grant cycle. The withholdings were specifically used to satisfy the reporting person’s tax withholding obligations on these equity awards.