Amentum Holdings, Inc.

Other than as described below, there have been no material changes to our Risk Factors disclosed in the Company’s Form 10-K for the year end September 27, 2024.

Uncertainty over global tariffs, or the financial impact of tariffs, may negatively impact our results.

Our business could be adversely impacted by changes in the U.S. Government’s approach to tariffs and other trade policies. As a result of major U.S. Government trade policy changes announced by President Trump, there is currently significant uncertainty with respect to tariffs that may impact our supply chain. New or increased tariffs for imports into the United States, as well as new or increased tariffs or trade bans imposed by other countries, could have an adverse effect on both our U.S. and international operations due to increased costs of materials, disruptions or delays in deliveries, and greater difficulty in planning and operating our business. While our business in the U.S. primarily provides labor services to our customers, some of our U.S. work involves providing goods that may be subject to tariffs. Our non-U.S. work could also be impacted by greater costs for goods sourced from the U.S. due to increased tariffs imposed by other countries. To date, the Company has not experienced a material negative impact from the recent changes in tariff policies. Although we plan to continue to monitor trade policy developments closely and to mitigate the adverse impacts of any changes where possible, we may not be able to fully mitigate such impacts in all situations.