401(k) · DOL Form 5500 · 2022
Century Aluminum Company 401(k) Plan
Data updated 2026-08-11
- $116M
- Total assets
- 1,979
- Participants
- 93rd
- Percentile by assets
- $58,508
- Avg per participant
Official DOL plan name: Century Aluminum 401(k) Plan · Sponsored by Century Aluminum Company · Illinois · Manufacturing
$116M in assets, 1,979 participants
Century Aluminum Company's Century Aluminum 401(k) Plan reported $116M in total assets and 1,979 participants in its 2022 DOL Form 5500 filing, ranking in the 93rd 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.
- 93rd percentile by assets (of 139,126 plans)
- #18,537 in Manufacturing (20,602 peers)
Coverage in Illinois
Century Aluminum 401(k) Plan covers 1,979 participants in Illinois, 2.5x the typical Illinois plan (state average ~779 per filing). Assets: $116M.
- $116M
- total plan assets (2022 EOY)
- 1,979
- covered participants
- 93rd
- percentile by assets (of 139,126 plans)
- $58,508
- avg assets per participant
The plan reported a net loss of $28M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Participants vs Illinois filers
In Illinois, the average filing covers about 779 participants across 5,745 plans. Century Aluminum 401(k) Plan reports 1,979 participants - 2.5x that state average ($116M EOY assets).
Illinois filing particulars
| Total Assets (Beginning of Year) | $144M |
|---|---|
| Net Assets (End of Year) | $116M |
| Net Income | -$28M |
| Employer EIN | 133070826 |
| Plan Effective Date | 1989-06-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Century Aluminum Company)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 2 | 2,495 | $274M |
| 2023 | 2 | 1,900 | $295M |
| 2024 | 2 | 1,883 | $305M |
Nearby 401(k) Plans in Illinois
Peer 401(k) plans, same state, same plan type, ranked by total assets.
Century Aluminum 401(k) Plan vs. nearby 401(k) plans in Illinois, assets vs. participants
- State Farm 401(k) Savings Plan $14.7B · 53,616
- Accenture United States 401(k) Match and Savings Plan $14.3B · 66,653
- Abbott Laboratories Stock Retirement Plan $13.3B · 36,136
- United Airlines Pilot Retirement Account Plan $11.8B · 13,437
- Walgreens Retirement Savings Plan $11.7B · 238,072
Similar-Sized 401(k) Plans Nationally
401(k) plans in other states closest to Century Aluminum 401(k) Plan by total assets, not by location.
- Amesbury Group, Inc. Retirement Savings Plan (SD) $116M · 1,284
- Ajinomoto Foods North America, Inc. 401(k) Savings Plan (CA) $116M · 2,625
- Johnson Controls Federal Systems, Inc. Retirement Savings Plan (WI) $116M · 777
- Foulston Siefkin Savings Plan (KS) $116M · 175
Frequently Asked Questions
How did Century Aluminum 401(k) Plan assets move in 2022? ▼
How have Century Aluminum Company plan assets changed over time? ▼
Where does Century Aluminum 401(k) Plan rank by assets among Form 5500 filers? ▼
Which 401(k) plans are similar in size to Century Aluminum 401(k) Plan? ▼
Next read for Century Aluminum 401(k) Plan
Filing takeaways
Ways to act on Century Aluminum 401(k) Plan's numbers.
- By total assets, Century Aluminum 401(k) Plan ranks in the top 10% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar 401(k) plans in Illinois. Compare plans
- Century Aluminum Company's sponsor-wide assets have grown 11.4% since 2022 across 3 plan years on file. More Manufacturing plans