401(k) · DOL Form 5500 · 2024
Amentum Services, Inc. 401(k) Plan
Data updated 2026-08-25
- $2.5B
- Total assets Very large vs avg
- 31,017
- Participants Very large workforce
- 99th
- Percentile by assets National rank
- $80,325
- 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
$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.
- #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.
- #20,102
- in Professional & Technical Services (20,173 peers)
- +13.6%
- assets growth YoY
- 25×
- vs typical plan assets (national mean)
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 2024 · DOL Form 5500
$2,491,428,129 Top 1% higher than 99% of 123,620 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024
Amentum 401(k) Retirement Plan's mega-plan peer group by participant headcount
Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Amentum 401(k) Retirement Plan is a mega filing (31,017 participants), the rightmost band on the breakdown.
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.
Published 5500 schedule card
Filing strip 271628265 · Amentum Services, Inc. PY 2024 · 401(k)
Amentum 401(k) Retirement Plan · $2.5B · 31,017 · 99th
- PCT $2.5B
- PCT 31,017
- PCT 99th
- PCT 401(k)
- PCT near Pipe Fitters Association L.U. 597, U.a. 401(k) Pla
- PCT ind #20102
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) | $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.)
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 $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 |
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 Pipe Fitters Association L.U. 597, U.a. 401(k) Pla in IL ($2.5B); by covered participants it is Bj's Wholesale Club, Inc. 401(k) Savings Plan in MA (31,034 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($2.5B here).
- 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
Similar participant headcount
Nearest other-state filings by covered participants (31,017 participants); asset peers above are excluded.
- Bj's Wholesale Club, Inc. 401(k) Savings Plan (MA) 31,034 · 17 off
- Providence Administrative Consulting Services Inc 401(k) Profit Sharing Plan and Trust (UT) 30,857 · 160 off
- Cardinal Health 401(k) Savings Plan (OH) 31,275 · 258 off
- Nestle 401(k) Savings Plan (OH) 30,677 · 340 off
DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.