Atmus (NYSE: ATMU) director receives 2,619 RSUs equity grant

Rhea-AI Filing Summary

Macadam Stephen E. reported acquisition or exercise transactions in this Form 4 filing.

Atmus Filtration Technologies Inc. director Stephen E. Macadam received a grant of 2,619 shares of Common Stock in the form of Restricted Share Units (RSUs) on May 12, 2026, as part of the 2026-2027 Annual Director Compensation program.

The RSUs carry no purchase price and will fully vest on May 12, 2027, or at the next Annual Meeting of Stockholders, whichever occurs first. Following this award, Macadam’s direct holdings total 38,588 shares of the company’s common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Macadam Stephen E.

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,619	$0.00	--

Holdings After Transaction: Common Stock — 38,588 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 2,619 shares Grant price: $0.0000 per share Shares after transaction: 38,588 shares +2 more

5 metrics

RSUs granted 2,619 shares Restricted Share Units granted May 12, 2026

Grant price $0.0000 per share Stated transaction price for RSU award

Shares after transaction 38,588 shares Total direct holdings following RSU grant

Vesting date May 12, 2027 RSUs vest on this date or next Annual Meeting

Transaction date May 12, 2026 Date RSUs were granted

Key Terms

Restricted Share Units ("RSUs"), Annual Director Compensation, fully vest, Annual Meeting of Stockholders

4 terms

Restricted Share Units ("RSUs") financial

"Reflects Restricted Share Units ("RSUs") granted on May 12, 2026, as part of the 2026-2027 Annual Director Compensation."

Annual Director Compensation financial

"granted on May 12, 2026, as part of the 2026-2027 Annual Director Compensation."

fully vest financial

"The RSUs fully vest on May 12, 2027, or the next Annual Meeting of Stockholders, whichever comes first."

Annual Meeting of Stockholders financial

"fully vest on May 12, 2027, or the next Annual Meeting of Stockholders, whichever comes first."

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^*

Macadam Stephen E.

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

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(1)	05/12/2026		A		2,619	A	$0	38,588	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 Restricted Share Units ("RSUs") granted on May 12, 2026, as part of the 2026-2027 Annual Director Compensation. The RSUs fully vest on May 12, 2027, or the next Annual Meeting of Stockholders, whichever comes first.

Remarks:

	/s/Tiffany B. Williams, Attorney-in-Fact for Stephen E. Macadam	05/13/2026
	** 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 did Atmus Filtration Technologies (ATMU) director Stephen Macadam receive in this Form 4?

Stephen E. Macadam received 2,619 Restricted Share Units (RSUs). These RSUs were granted on May 12, 2026 as part of Atmus’s 2026-2027 Annual Director Compensation, increasing his direct common stock holdings to 38,588 shares after the award.

When do Stephen Macadam’s new Atmus (ATMU) RSUs vest?

The RSUs fully vest on May 12, 2027, or the next Annual Meeting. Vesting occurs on whichever event happens first, aligning the director’s compensation schedule with the company’s stockholder meeting cycle over the 2026-2027 period.

Did Stephen Macadam buy Atmus (ATMU) shares on the open market?

No, this was a compensation grant, not an open-market purchase. The 2,619 RSUs were awarded at a stated price of $0.0000 per share as part of annual director compensation, rather than being bought on an exchange.

How many Atmus (ATMU) shares does Stephen Macadam hold after this RSU grant?

After the grant, Macadam directly holds 38,588 common shares. This total includes the 2,619 RSUs awarded on May 12, 2026, reflecting his updated position as reported in the Form 4 filing.

What is the nature of the Atmus (ATMU) RSUs granted to Stephen Macadam?

The RSUs are part of Atmus’s 2026-2027 Annual Director Compensation. They represent a stock-based award that will convert into common shares upon vesting, aligning director compensation with shareholder interests over the vesting period.