Official announcements (8-K)

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's words(the “Company”) approved an amendment and restatement of Steven J. Demetriou’s, the Executive Chair of the Amentum Holdings Board of Directors, employment agreement with the Company (the “Employment Agreement”). The Employment Agreement, the initial term of which ended on September 27, 2026, will continue until terminated by the Company or Mr. Demetriou. Under the Employment Agreement, effective September 28, 2026, Mr. Demetriou’s base salary is $625,000 while his bonus/short-term incentive is 100% of his base salary. In addition, his long-term incentive (LTI) opportunity is a total intended target value at grant of $1,250,000. The Employment Agreement was amended to …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn August 10, 2026, Amentum Holdings, Inc. (“Amentum”) released its financial results for the third quarter ended July 3, 2026. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on August 11, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn May 11, 2026, Amentum Holdings, Inc. (“Amentum”) released its financial results for the second quarter ended April 3, 2026. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on May 12, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

In the company's wordsAmended Credit Agreement On April 24, 2026, Amentum Holdings, Inc., a Delaware corporation (“Amentum”), entered into the First Amendment (the “First Amendment”), dated as of such date, among Amentum, Amentum Services, Inc., a Delaware corporation (“Amentum Services”), Amentum Technology, Inc., a Tennessee corporation (“Amentum Technology”), the other loan parties party thereto, the lenders party thereto, the issuing banks party thereto and JPMorgan Chase Bank, N.A., as administrative agent (the “Administrative Agent”), which amends the Credit Agreement dated as of September 27, 2024 (the “Existing Credit Agreement” and, as amended by the First Amendment, the “Credit …

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

In the company's words(“Amentum” or the “Company”) was held on February 6, 2026 (the “Annual Meeting”). At the annual meeting, Amentum’s stockholders voted on the following three proposals and cast their votes as described below. 1.The individuals listed below were elected at the Annual Meeting to serve as directors of the Company until the next annual meeting of shareholders and until their respective successors are elected: Nominee Votes For Votes Against Votes Abstained Broker Non-Votes Steven J. Demetriou 216,313,497 4,429,862 82,303 12,216,943 John Heller 220,529,787 203,196 92,679 12,216,943 Benjamin Dickson 219,850,419 878,330 96,913 12,216,943 Vincent K. Brooks 218,581,468 1,603,151 …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn February 9, 2026, Amentum Holdings, Inc. (“Amentum”) released its financial results for the first quarter ended January 2, 2026. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on February 10, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn November 24, 2025, Amentum Holdings, Inc. (“Amentum”) released its financial results for the fourth quarter and full year ended October 3, 2025. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on November 25, 2025 is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn August 5, 2025, Amentum Holdings, Inc. (“Amentum”) released its financial results for the third quarter ended June 27, 2025. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on August 6, 2025 is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn May 6, 2025, Amentum Holdings, Inc. (“Amentum”) released its financial results for the second quarter ended March 28, 2025. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on May 7, 2025 is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

In the company's words(the “Amentum”) is filing this Current Report on Form 8-K (the “Form 8-K”) to reflect changes to the presentation of our financial information as set forth in our Annual Report on Form 10-K for the fiscal year ended September 27, 2024 (the “2024 Form 10-K”), as filed with the Securities and Exchange Commission (the “SEC”) on December 17, 2024, in order to give effect to a change in segment reporting. As previously disclosed in the Quarterly Report on Form 10-Q for the three months ended December 27, 2024 (as filed with the SEC on February 5, 2025), effective during the three months ended December 27, 2024, the Company announced the realignment of our reporting structure, …

Shared documents (Item 9.01)

Attached documents only, such as a press release.

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

In the company's words(“Amentum” or the “Company”) was held on March 5, 2025 (the “Annual Meeting”). At the annual meeting, Amentum’s stockholders voted on the following four proposals and cast their votes as described below. 1.The individuals listed below were elected at the Annual Meeting to serve as directors of the Company until the next annual meeting of shareholders and until their respective successors are elected: Nominee Votes For Votes Against Votes Abstained Broker Non-Votes Steven J. Demetriou 186,791,196 2,819,132 95,121 12,678,253 John Heller 189,332,033 236,411 137,005 12,678,253 Benjamin Dickson 189,464,233 119,135 122,081 12,678,253 Vincent K. Brooks 188,044,770 1,515,482 …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.