401(k) · DOL Form 5500 · 2024
Century Aluminum Company 401(k) Plan
Data updated 2026-08-11
- $150M
- Total assets
- 1,418
- Participants
- 93rd
- Percentile by assets
- $105,581
- Avg per participant
Official DOL plan name: Century Aluminum 401(k) Plan · Sponsored by Century Aluminum Company · Illinois · Manufacturing
$150M in assets, 1,418 participants
Century Aluminum Company's Century Aluminum 401(k) Plan reported $150M in total assets and 1,418 participants in its 2024 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 123,622 plans)
- #15,886 in Manufacturing (17,777 peers)
Where Century Aluminum 401(k) Plan sits by assets
Century Aluminum 401(k) Plan sits in the top 10% of all filed plans by assets, $150M for 1,418 participants (~$105,581/participant), up 12.2% in 2024.
- $150M
- total plan assets (2024 EOY)
- 1,418
- covered participants
- 93rd
- percentile by assets (of 123,622 plans)
- $105,581
- avg assets per participant
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Century Aluminum 401(k) Plan end-of-year assets rose from $133M in the plan year 2023 filing to $150M in the plan year 2024 filing.
- Century Aluminum 401(k) Plan reported net income fell from $18M in the plan year 2023 filing to $16M in the plan year 2024 filing.
Century Aluminum 401(k) Plan vs the 2024 asset distribution
By assets, Century Aluminum 401(k) Plan outranks 93% of the 123,622 plans that filed a Form 5500 for the 2024 plan year, and holds roughly 1.5x the national average plan size of $100M (721 average participants).
Scale-class filing particulars (2024)
| Total Assets (Beginning of Year) | $133M |
|---|---|
| Net Assets (End of Year) | $150M |
| Net Income | $16M |
| 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
- Accenture United States 401(k) Match and Savings Plan $21.3B · 66,965
- State Farm 401(k) Savings Plan $19.0B · 63,297
- United Airlines Pilot Retirement Account Plan $16.8B · 16,659
- Abbott Laboratories Stock Retirement Plan $15.8B · 38,229
- Walgreens Retirement Savings Plan $14.5B · 233,635
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.
- Countrymark Savings Plan (IN) $150M · 495
- Ewing Irrigation Products, Inc. Profit Sharing Plan (AZ) $150M · 1,407
- Mmm Partner/Staff 401(k) Profit Sharing Plan (GA) $150M · 227
- Schnucks Pay Deferral Plan (MO) $150M · 760
Frequently Asked Questions
How did Century Aluminum 401(k) Plan assets move in 2024? ▼
How have Century Aluminum Company plan assets changed over time? ▼
Where does Century Aluminum 401(k) Plan rank by assets among Form 5500 filers? ▼
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Next read for Century Aluminum 401(k) Plan
Scale reading
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