Atmus Filtration (ATMU) director purchases 2,000 shares in open market trade

Rhea-AI Filing Summary

Atmus Filtration Technologies Inc. director Stephen E. Macadam purchased additional common stock. On 2026-08-12, he bought 2,000 shares of common stock in a purchase categorized as an open market or private transaction at $49.7756 per share. Following this transaction, he directly owns 40,588 shares of Atmus Filtration Technologies Inc. common stock. The transaction was not marked as being conducted under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Buyer: 2,000 shares

Net Buy 1 txn

Insider Macadam Stephen E.

Role Director

Bought 2,000 shs ($100K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	2,000	$49.7756	$100K

Holdings After Transaction: Common Stock — 40,588 shares (Direct)

Key Figures

Shares purchased: 2,000 shares Purchase price: $49.7756 per share Post-transaction holdings: 40,588 shares +1 more

4 metrics

Shares purchased 2,000 shares Common stock purchased on 2026-08-12

Purchase price $49.7756 per share Price for common stock purchase on 2026-08-12

Post-transaction holdings 40,588 shares Direct ownership after 2,000-share purchase

Net buy shares 2,000 shares Net buy direction in transaction summary

Key Terms

open market or private transaction, direct ownership, Rule 10b5-1 trading plan

3 terms

open market or private transaction financial

"Purchase in open market or private transaction"

direct ownership financial

"Following this transaction, he directly owns 40,588 shares"

Rule 10b5-1 trading plan regulatory

"The transaction was not marked as being conducted under a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

FAQ

What insider transaction did Atmus Filtration (ATMU) report for Stephen E. Macadam?

Stephen E. Macadam reported a purchase of 2,000 shares of Atmus Filtration common stock on 2026-08-12, classified as an open market or private transaction at $49.7756 per share.

How many Atmus Filtration (ATMU) shares does Stephen E. Macadam hold after this transaction?

After the reported transaction, Stephen E. Macadam directly holds 40,588 shares of Atmus Filtration Technologies Inc. common stock, reflecting the addition of 2,000 shares purchased on 2026-08-12.

At what price did Stephen E. Macadam buy Atmus Filtration (ATMU) shares?

Stephen E. Macadam purchased 2,000 shares of Atmus Filtration common stock at a price of $49.7756 per share on 2026-08-12 in an open market or private transaction.

Was the latest Atmus Filtration (ATMU) insider trade under a Rule 10b5-1 plan?

The filing indicates the trade was not under a Rule 10b5-1 trading plan. The Rule 10b5-1 checkbox was left unchecked, so the 2,000-share purchase appears discretionary rather than pre-planned.

What type of transaction did the Atmus Filtration (ATMU) director use to buy shares?

The transaction is described as a purchase in open market or private transaction. On 2026-08-12, Stephen E. Macadam acquired 2,000 common shares at $49.7756 per share through this transaction type.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/13/2026 - 02:49 PM Accepted by SEC EDGAR 08/13/2026 - 02:48 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^*

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)
08/12/2026

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	08/12/2026		P		2,000	A	$49.7756	40,588	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:

Remarks:

	/s/Tiffany B. Williams, Attorney-in-Fact for Stephen E. Macadam	08/13/2026
	** 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)