Retirement Plans (Tables)

12 Months Ended

Oct. 03, 2025

Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan

The following tables provide reconciliations of the changes in the Defined Benefit Pension Plans benefit obligations, reconciliations of the changes in the fair value of assets for the years ended October 3, 2025, September 27, 2024 and September 29, 2023 and reconciliations of the funded status as of October 3, 2025 and September 27, 2024.



	For the years ended
(Amounts in millions)	October 3, 2025		September 27, 2024		September 29, 2023
Change in benefit obligation
Benefit obligation at beginning of period	$	313	$	292	$	310


Interest cost	14		17		16

Benefits paid from the plans	(21)		(22)		(21)


Actuarial (gain) loss	(10)		26		(13)
Benefit obligation at end of period	$	296	$	313	$	292



	For the years ended
(Amounts in millions)	October 3, 2025		September 27, 2024		September 29, 2023
Change in plan assets
Fair value of plan assets at beginning of period	$	315	$	281	$	271

Actual return on plan assets	11		55		30
Employer contributions to plans	—		1		—

Benefits paid from the plans	(21)		(22)		(20)


Fair value of plan assets at end of period	$	305	$	315	$	281

Schedule of Defined Benefit Plan, Plan Assets, Category

As of October 3, 2025 and September 27, 2024, the fair values of the Defined Benefit Pension Plan by major asset categories were as follows:


	October 3, 2025						September 27, 2024
	Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Carrying Value		Quoted Prices in Active Markets (Level 1)
(Amounts in millions)
Investments measured at fair value
Cash and cash equivalents	$	9	$	9	$	—	$	6	$	6
Investment funds

Fixed income funds	233		50		183		128		128
Total investments measured at fair value	$	242	$	59	$	183	$	134	$	134
Investments measured at NAV
Investment funds
Common collective funds - debt	$	—					$	87
Diversified and equity funds	63						94
Total investments measured at NAV	63						181
Total	$	305					$	315

Amentum Holdings, Inc. 10-K