401(k) · DOL Form 5500 · 2022
Amentum Services, Inc. 401(k) Plan
Data updated 2026-08-25
- $1.8B
- Total assets Very large vs avg
- 15,670
- Participants Very large workforce
- 99th
- Percentile by assets National rank
- $118,059
- Avg per participant Below avg balance/head
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.
- #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.
- #21,486
- in Professional & Technical Services (21,562 peers)
- +13.1%
- assets growth YoY
- 19×
- vs typical plan assets (national mean)
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.
Amentum 401(k) Retirement Plan's outsized position by total assets
Amentum 401(k) Retirement Plan vs every filed plan by assets
End-of-year total assets · plan year 2022 · DOL Form 5500
$1,849,976,784 Top 1% higher than 99% of 139,123 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2022
Amentum 401(k) Retirement Plan's mega-plan peer group by participant headcount
Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Amentum 401(k) Retirement Plan is a mega filing (15,670 participants), the rightmost band on the breakdown.
Form 5500 schedule snapshot
Filing strip 271628265 · Amentum Services, Inc. PY 2022 · 401(k)
Amentum 401(k) Retirement Plan · $1.8B · 15,670 · 99th
- 5500 $1.8B
- ASSETS 15,670
- PCT 99th
- EIN 401(k)
- RANK near Ricoh USA, Inc. Retirement Savings Plan
- PHOTO ind #21486
Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Professional & Technical Services retirement plans → · Plans in Virginia →
Amentum 401(k) Retirement Plan in the asset neighbourhood
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.)
Sponsor-wide plan assets over time
All Amentum Services, Inc. plans reported in each filing year
- Latest sponsor-wide plan assets
- $2.5B 34.67348079974608% vs 2022
- 2024 filing year
| 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.
- 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)
Amentum 401(k) Retirement Plan's out-of-state 401(k) peers by assets and headcount
Outside Virginia, the nearest 401(k) by assets is Ricoh USA, Inc. Retirement Savings Plan in PA ($1.9B); by covered participants it is Michaels Stores, Inc. Employees 401(k) Plan in TX (15,648 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($1.8B here).
- 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
Similar participant headcount
Nearest other-state filings by covered participants (15,670 participants); asset peers above are excluded.
- Michaels Stores, Inc. Employees 401(k) Plan (TX) 15,648 · 22 off
- Worldwide Flight Services, Inc. 401(k) Plan (TX) 15,643 · 27 off
- Asurion, LLC 401(k) Plan (TN) 15,634 · 36 off
- The Lilly Employee 401(k) Plan (IN) 15,607 · 63 off
DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.