401(k) · DOL Form 5500 · 2022
Amentum Services, Inc. 401(k) Plan
Data updated 2026-08-11
- $1.8B
- Total assets
- 15,670
- Participants
- 99th
- Percentile by assets
- $118,059
- Avg per participant
Official DOL plan name: Amentum 401(k) Retirement Plan · Sponsored by Amentum Services, Inc. · Virginia · Professional & Technical Services
$1.8B in assets, 15,670 participants
Amentum Services, Inc.'s Amentum 401(k) Retirement Plan reported $1.8B in total assets and 15,670 participants in its 2022 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 139,126 plans)
- #21,486 in Professional & Technical Services (21,562 peers)
Coverage in Virginia
Amentum 401(k) Retirement Plan covers 15,670 participants in Virginia, 20x the typical Virginia plan (state average ~782 per filing). Assets: $1.8B.
- $1.8B
- total plan assets (2022 EOY)
- 15,670
- covered participants
- 99th
- percentile by assets (of 139,126 plans)
- $118,059
- avg assets per participant
The plan reported a net loss of $343M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Participants vs Virginia filers
In Virginia, the average filing covers about 782 participants across 3,655 plans. Amentum 401(k) Retirement Plan reports 15,670 participants - 20x that state average ($1.8B EOY assets).
Virginia filing particulars
| Total Assets (Beginning of Year) | $1.6B |
|---|---|
| Net Assets (End of Year) | $1.8B |
| Net Income | -$343M |
| 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 $32.6B · 92,420
- 401(k) Pension Plan $13.0B · 61,481
- General Dynamics Corporation 401(k) Plan 6.0 $9.6B · 36,822
- Leidos, Inc. Retirement Plan $8.7B · 26,125
- Bae Systems Employees' Savings and Investment Plan $8.2B · 31,556
Scale composition for Amentum 401(k) Retirement Plan
Amentum 401(k) Retirement Plan reports $1.8B in end-of-year assets across 15,670 participants (0.015% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.017% of 93,925,755 covered participants) - about $118,059 per participant (85% of the national average assets-per-participant) . Net income for plan year 2022 was -$343M.
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 | This page |
| 2023 | 22,820 | $2.2B | Open filing |
| 2024 · index core | 31,017 | $2.5B | Open filing |
The same sponsor also keeps 1 other index-core plan on PlainRetire:
- Amentum 401(k) Retirement Plan (401(k), $2.5B, 31,017 participants)
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.
- Ricoh USA, Inc. Retirement Savings Plan (PA) $1.9B · 13,505
- Iso 401(k) Savings and Employee Stock Ownership Plan (NJ) $1.9B · 5,476
- U.S. Anesthesia Partners, Inc. 401(k) Plan (TX) $1.9B · 5,118
- Kellogg Brown & Root, Inc. Retirement and Savings Plan (TX) $1.8B · 3,531
Frequently Asked Questions
How did Amentum 401(k) Retirement Plan assets move in 2022? ▼
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