SCHEDULE 13G/A 0001193125-24-256176 0000052988 XXXXXXXX LIVE 1 Common Stock, $0.01 par value 03/13/2025 0002011286 Amentum Holdings, Inc. 023939101 4800 Westfields Blvd. Suite #400 Chantilly VA 20151 Rule 13d-1(d) Jacobs Solutions Inc. DE 0 0 0 0 0 N 0 CO This Amendment No. 1 (this "Amendment") amends, in its entirety, the statement on Schedule 13G originally filed with the Securities and Exchange Commission on November 12, 2024 by the Reporting Person. On March 13, 2025, a subsidiary of the Reporting Person exchanged 19,464,174 shares of the Issuer's common stock in an equity-for-debt exchange. This Amendment is the final amendment to the Schedule 13G and constitutes an exit filing for the Reporting Person. Jacobs Engineering Group Inc. DE 0 0 0 0 0 N 0 CO This Amendment amends, in its entirety, the statement on Schedule 13G originally filed with the Securities and Exchange Commission on November 12, 2024 by the Reporting Person. On March 13, 2025, the Reporting Person exchanged 19,464,174 shares of the Issuer's common stock in an equity-for-debt exchange. This Amendment is the final amendment to the Schedule 13G and constitutes an exit filing for the Reporting Person. Amentum Holdings, Inc. 4800 Westfields Blvd., Suite #400, Chantilly, Virginia 20151 Jacobs Solutions Inc. Jacobs Engineering Group Inc. 1999 Bryan Street, Suite 3500, Dallas, TX 75201 Jacobs Solutions Inc. is a Delaware corporation. Jacobs Engineering Group Inc. is a Delware corporation. Y 0 0 0 0 0 0 N Y Y N This schedule is filed pursuant to Rule 13d-1(d). See Exhibit A. Y Y Y Jacobs Solutions Inc. /s/ Venk Nathamuni 03/13/2025 Jacobs Engineering Group Inc. /s/ Venk Nathamuni 03/13/2025