Invesco Reports 10.1% Stake in Amentum

Amentum Holdings Inc: Invesco Ltd. filed Amendment No. 3 to a Schedule 13G/A reporting beneficial ownership of 24,529,939 shares of Common Stock, equal to 10.1% of the class.

Rhea-AI Filing Summary

Amentum Holdings Inc: Invesco Ltd. filed Amendment No. 3 to a Schedule 13G/A reporting beneficial ownership of 24,529,939 shares of Common Stock, equal to 10.1% of the class. The filing shows sole voting power of 24,481,944 shares and sole dispositive power of 24,529,939. The schedule lists related advisory subsidiaries and is signed by Robert R. Leveille on 05/07/2026.

Insights

Institutional Ownership Analyst

Invesco Ltd. reports a >10% passive stake in Amentum, disclosed via Schedule 13G/A.

Invesco Ltd. is reported as a parent holding company beneficially owning 24,529,939 shares (10.1%). The filing identifies affiliated advisers that hold the securities of record for clients, consistent with institutional aggregation rules.

Disclosure lists voting and dispositive counts and names the related advice entities. The filing is a snapshot of ownership; subsequent trading or filings would update this position.

Key Figures

Beneficial ownership: 24,529,939 shares Percent of class: 10.1% Sole voting power: 24,481,944 shares +2 more

5 metrics

Beneficial ownership 24,529,939 shares Amount beneficially owned reported on Schedule 13G/A

Percent of class 10.1% Percent of common stock reported

Sole voting power 24,481,944 shares Sole power to vote or to direct the vote

Sole dispositive power 24,529,939 shares Sole power to dispose or to direct disposition

Filing signature date 05/07/2026 Signature by Global Head of Compliance

Key Terms

Schedule 13G/A, beneficially own, parent holding company

3 terms

Schedule 13G/A regulatory

"Amendment No. 3 to a Schedule 13G/A reporting beneficial ownership"

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 own financial

"may be deemed to beneficially own 24,529,939 shares"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

parent holding company regulatory

"Invesco Ltd., in its capacity as a parent holding company to its investment advisers"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Invesco Ltd. report in AMTM?

Invesco Ltd. reports beneficial ownership of 24,529,939 shares of Amentum (AMTM), representing 10.1% of the common stock. The filing aggregates shares held of record by clients of Invesco's advisory affiliates.

Who holds voting and dispositive power for the reported AMTM shares?

The filing shows sole voting power of 24,481,944 shares and sole dispositive power of 24,529,939 shares. These powers are reported in Invesco Ltd.'s capacity as a parent holding company to its advisers.

Which Invesco entities are identified on the Schedule 13G/A for AMTM?

The Schedule lists affiliated advisers including Invesco Advisers, Inc., Invesco Asset Management Limited, Invesco Investment Advisers LLC, and Invesco Capital Management LLC as relevant subsidiaries involved in the holdings.

When was the Schedule 13G/A for AMTM signed?

The amendment is signed by Robert R. Leveille, Global Head of Compliance, with an execution date of 05/07/2026. The cover shows an issuer CUSIP of 023939101 and an amendment number of 3.

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

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Accepted by SEC EDGAR 05/07/2026 - 11:41 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Amentum Holdings Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

023939101

(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): 023939101

1

Names of Reporting Persons

Invesco Ltd.

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

BERMUDA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 24,481,944.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 24,529,939.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

24,529,939.00

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)

10.1 %

12

Type of Reporting Person (See Instructions)

HC, IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Amentum Holdings Inc
(b)	Address of issuer's principal executive offices: 4800 Westfields Blvd , Suite 400 , Chantilly , VA 20151
Item 2.
(a)	Name of person filing: Invesco Ltd. ("Invesco Ltd.")
(b)	Address or principal business office or, if none, residence: 1331 Spring Street NW, Suite 2500, Atlanta, GA 30309
(c)	Citizenship: Bermuda
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 023939101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Invesco Ltd., in its capacity as a parent holding company to its investment advisers, may be deemed to beneficially own 24,529,939 shares of the Issuer which are held of record by clients of Invesco Ltd.
(b)	Percent of class: 10.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 24,481,944
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 24,529,939
	(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. However, no one individual has greater than 5% economic ownership. The shareholders of the Fund have the right to receive or the power to direct the receipt of dividends and proceeds from the sale of securities listed above.
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. Invesco Advisers, Inc. Invesco Asset Management Limited Invesco Investment Advisers LLC Invesco Capital Management LLC
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.

Invesco Ltd.

Signature:	Robert R. Leveille
Name/Title:	Global Head of Compliance
Date:	05/07/2026