RSU grant boosts Atmus (NYSE: ATMU) CEO Disher’s equity stake

Rhea-AI Filing Summary

Atmus Filtration Technologies granted Chief Executive Officer Stephanie Disher 31,492 restricted stock units as part of its 2026 annual long-term incentive compensation program. These RSUs vest in three equal tranches beginning on March 1, 2027, and each vested unit will convert into one share of common stock, bringing her direct holdings to 388,676 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Disher Stephanie

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	31,492	$0.00	--

Holdings After Transaction: Common Stock — 388,676 shares (Direct)

Footnotes (1)

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Key Figures

RSUs granted: 31,492 units Shares after transaction: 388,676 shares Vesting tranches: 3 equal tranches +1 more

4 metrics

RSUs granted 31,492 units Restricted stock units awarded to CEO as part of 2026 LTIP

Shares after transaction 388,676 shares CEO direct holdings of Atmus common stock following grant

Vesting tranches 3 equal tranches RSUs vesting schedule beginning March 1, 2027

First vesting date March 1, 2027 Initial vesting date for RSU grant under 2022 Omnibus Plan

Key Terms

restricted stock units, 2022 Omnibus Incentive Plan, long-term incentive compensation program, vest

4 terms

restricted stock units financial

"Represents restricted stock units ("RSUs") granted under the Atmus Filtration Technologies Inc."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2022 Omnibus Incentive Plan financial

"granted under the Atmus Filtration Technologies Inc. ("Atmus") 2022 Omnibus Incentive Plan as part"

long-term incentive compensation program financial

"as part of Atmus' 2026 annual long-term incentive compensation program, which RSUs will vest"

vest financial

"which RSUs will vest in three equal tranches, beginning on March 1, 2027."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

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^*

Disher Stephanie

(Last) (First) (Middle)

26 CENTURY BOULEVARD

(Street)

NASHVILLE TENNESSEE 37214

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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	04/01/2026		A		31,492(1)	A	$0	388,676	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. Represents restricted stock units ("RSUs") granted under the Atmus Filtration Technologies Inc. ("Atmus") 2022 Omnibus Incentive Plan as part of Atmus' 2026 annual long-term incentive compensation program, which RSUs will vest in three equal tranches, beginning on March 1, 2027. Each RSU that vests will be settled with one share of Atmus common stock.

Remarks:

	/s/Tiffany B. Williams, Attorney-in-Fact for Stephanie Disher	04/02/2026
	** 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)

FAQ

What insider transaction did Atmus (ATMU) report for CEO Stephanie Disher?

Atmus reported that CEO Stephanie Disher received 31,492 restricted stock units as a stock-based compensation grant. The award is part of the company’s 2026 annual long-term incentive program and increases her direct holdings to 388,676 shares of Atmus common stock after the transaction.

How many shares did Atmus (ATMU) CEO Stephanie Disher hold after this Form 4?

After the grant, Stephanie Disher directly holds 388,676 shares of Atmus common stock. This figure includes the newly awarded 31,492 restricted stock units, which are scheduled to convert into shares as they vest over time under the company’s long-term incentive plan.

What are the vesting terms of Stephanie Disher’s 31,492 RSUs at Atmus (ATMU)?

The 31,492 restricted stock units vest in three equal tranches starting on March 1, 2027. Each tranche represents one-third of the grant, and each RSU that vests will be settled in one share of Atmus common stock under the 2022 Omnibus Incentive Plan.

Is Stephanie Disher’s Form 4 transaction in Atmus (ATMU) a market purchase or sale?

The Form 4 transaction is a grant of restricted stock units, not a market purchase or sale. The award is labeled as an acquisition under a grant or award, with a price per share of 0.0000, reflecting compensation rather than an open-market trade.

Under which plan were the 31,492 RSUs granted to Atmus (ATMU) CEO Stephanie Disher?

The 31,492 restricted stock units were granted under the Atmus Filtration Technologies Inc. 2022 Omnibus Incentive Plan. This grant forms part of Atmus’ 2026 annual long-term incentive compensation program designed to align executive compensation with shareholder interests over time.