BlackRock takes 14.2% position in ATMUS Filtration (ATMU)

Rhea-AI Filing Summary

ATMUS FILTRATION TECHNOLOGIES INC reported an amended Schedule 13G showing BlackRock, Inc. beneficially owns 11,570,977 shares, representing 14.2% of the outstanding common stock. The filing lists sole voting power of 11,424,832 shares and sole dispositive power of 11,570,977. The amendment clarifies that the stake reflects holdings across certain BlackRock business units and identifies iShares Core S&P Small-Cap ETF as an underlying holder above 5%.

Insights

Institutional Ownership Analyst

BlackRock now reports a 14.2% passive stake in ATMU.

Schedule 13G/A filings typically indicate large, passive institutional holdings rather than activist intent. The filing shows sole dispositive power of 11,570,977 shares and sole voting power of 11,424,832 shares, suggesting centralized trading authority within BlackRock.

Future disclosures may clarify whether this position remains passive or if any business unit-specific actions change voting or disposition patterns.

Corporate Governance Specialist

Disclosure affects governance visibility but not immediate corporate actions.

BlackRock's >5% position requires public disclosure and makes its voting profile visible to investors and the company board. The filing names iShares Core S&P Small-Cap ETF as another holder above 5%, highlighting fund-level ownership within BlackRock's holdings.

Board and management will see the stake; any governance implications depend on whether BlackRock signals active engagement in subsequent filings.

Key Figures

Beneficial ownership: 11,570,977 shares Percent of class: 14.2% Sole voting power: 11,424,832 shares +1 more

4 metrics

Beneficial ownership 11,570,977 shares amount beneficially owned

Percent of class 14.2% percent of outstanding common stock

Sole voting power 11,424,832 shares shares with sole power to vote

Sole dispositive power 11,570,977 shares shares with sole power to dispose

Key Terms

Schedule 13G/A, Beneficially owned, Sole dispositive power, Reporting Business Units

4 terms

Schedule 13G/A regulatory

"Amendment No. 1; reporting beneficial ownership of large passive investors"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficially owned financial

"Amount beneficially owned: 11570977"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 11570977"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Reporting Business Units corporate

"reflects the securities beneficially owned by certain business units"

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

ATMUS FILTRATION TECHNOLOGIES INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

04956D107

(CUSIP Number)

04/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 04956D107

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 11,424,832.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 11,570,977.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

11,570,977.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

14.2 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ATMUS FILTRATION TECHNOLOGIES INC
(b)	Address of issuer's principal executive offices: 26 CENTURY BOULEVARD NASHVILLE TN 37214
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 04956D107
Item 4.	Ownership
(a)	Amount beneficially owned: 11570977
(b)	Percent of class: 14.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 11424832
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 11570977
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The interest of 1 such person, iShares Core S&P Small-Cap ETF, in the common stock of ATMUS FILTRATION TECHNOLOGIES INC is more than five percent of the total outstanding common stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	05/06/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

What does ATMU's Schedule 13G/A from BlackRock mean?

It shows BlackRock beneficially owns 11,570,977 shares of ATMU, equal to 14.2% of the class. This is a regulatory disclosure of a large, typically passive institutional stake across BlackRock business units.

Does BlackRock control ATMU after this filing?

No definitive control change is reported; BlackRock lists sole voting power for 11,424,832 shares and dispositive power for 11,570,977, but the filing indicates aggregated business-unit holdings rather than an explicit change in control.

Who else is identified as holding more than 5% of ATMU?

The filing identifies iShares Core S&P Small-Cap ETF as a person with interest exceeding 5% of ATMU common stock. The amendment does not quantify that ETF's exact share count in this excerpt.

Is this Schedule 13G/A an active or passive disclosure for ATMU?

This is a Schedule 13G/A amendment which generally reflects a passive institutional position rather than an active acquisition or activist intent. The filing aggregates holdings across BlackRock business units as permitted by SEC guidance.