401(k) · DOL Form 5500 · 2024
Amentum Services, Inc. 401(k) Plan
Data updated 2026-08-11
- $2.5B
- Total assets
- 31,017
- Participants
- 99th
- Percentile by assets
- $80,325
- Avg per participant
Official DOL plan name: Amentum 401(k) Retirement Plan · Sponsored by Amentum Services, Inc. · Virginia · Professional & Technical Services
$2.5B in assets, 31,017 participants
Amentum Services, Inc.'s Amentum 401(k) Retirement Plan reported $2.5B in total assets and 31,017 participants in its 2024 DOL Form 5500 filing, ranking in the 99th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.
- 99th percentile by assets (of 123,622 plans)
- #20,102 in Professional & Technical Services (20,173 peers)
Coverage in Virginia
Amentum 401(k) Retirement Plan covers 31,017 participants in Virginia, 40x the typical Virginia plan (state average ~782 per filing). Assets: $2.5B.
- $2.5B
- total plan assets (2024 EOY)
- 31,017
- covered participants
- 99th
- percentile by assets (of 123,622 plans)
- $80,325
- avg assets per participant
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Amentum 401(k) Retirement Plan reported participants rose from 22,820 in the plan year 2023 filing to 31,017 in the plan year 2024 filing.
- Amentum 401(k) Retirement Plan end-of-year assets rose from $2.2B in the plan year 2023 filing to $2.5B in the plan year 2024 filing.
- Amentum 401(k) Retirement Plan reported net income fell from $343M in the plan year 2023 filing to $297M in the plan year 2024 filing.
Participants vs Virginia filers
In Virginia, the average filing covers about 782 participants across 3,655 plans. Amentum 401(k) Retirement Plan reports 31,017 participants - 40x that state average ($2.5B EOY assets).
Virginia filing particulars
| Total Assets (Beginning of Year) | $2.2B |
|---|---|
| Net Assets (End of Year) | $2.5B |
| Net Income | $297M |
| Employer EIN | 271628265 |
| Plan Effective Date | 2011-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Amentum Services, Inc.)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 15,670 | $1.8B |
| 2023 | 1 | 22,820 | $2.2B |
| 2024 | 1 | 31,017 | $2.5B |
Nearby 401(k) Plans in Virginia
Peer 401(k) plans, same state, same plan type, ranked by total assets.
Amentum 401(k) Retirement Plan vs. nearby 401(k) plans in Virginia, assets vs. participants
- Northrop Grumman Savings Plan $39.5B · 104,719
- 401(k) Pension Plan $16.8B · 62,869
- General Dynamics Corporation 401(k) Plan 6.0 $12.4B · 49,414
- Capital One Financial Corporation Associate Savings Plan $12.0B · 44,933
- Leidos, Inc. Retirement Plan $11.8B · 29,734
Scale composition for Amentum 401(k) Retirement Plan
Amentum 401(k) Retirement Plan reports $2.5B in end-of-year assets across 31,017 participants (0.020% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.033% of 93,925,755 covered participants) - about $80,325 per participant (58% of the national average assets-per-participant) . Net income for plan year 2024 was $297M.
This plan identity (EIN 271628265, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $1.8B to $2.5B (+34.7%) while covered participants moved from 15,670 to 31,017 . Single-year sparse filers cannot show that trail.
| Plan year | Participants | EOY assets | Filing |
|---|---|---|---|
| 2022 | 15,670 | $1.8B | Open filing |
| 2023 | 22,820 | $2.2B | Open filing |
| 2024 · index core | 31,017 | $2.5B | This page |
Similar-Sized 401(k) Plans Nationally
401(k) plans in other states closest to Amentum 401(k) Retirement Plan by total assets, not by location.
- Pipe Fitters Association L.U. 597, U.a. 401(k) Pla (IL) $2.5B · 9,298
- Triad 401(k) Retirement Plan (NM) $2.5B · 11,744
- Hyatt Corporation Retirement Savings Plan (IL) $2.5B · 35,391
- Finra Savings Plus Plan (DC) $2.5B · 4,201
Frequently Asked Questions
How did Amentum 401(k) Retirement Plan assets move in 2024? ▼
How have Amentum Services, Inc. plan assets changed over time? ▼
Where does Amentum 401(k) Retirement Plan rank by assets among Form 5500 filers? ▼
Which 401(k) plans are similar in size to Amentum 401(k) Retirement Plan? ▼
Next read for Amentum 401(k) Retirement Plan
Filing takeaways
Ways to act on Amentum 401(k) Retirement Plan's numbers.
- By total assets, Amentum 401(k) Retirement Plan ranks among the largest 1% of all filed plans. See the largest plans
- Compare it side-by-side against 3 similar 401(k) plans in Virginia. Compare plans
- Amentum Services, Inc.'s sponsor-wide assets have grown 34.7% since 2022 across 3 plan years on file. More Professional & Technical Services plans