Defined Benefit (Pension) · DOL Form 5500 · 2023

Century Aluminum Company Pension Plan

Data updated 2026-08-25

$162M
Total assets Near avg plan size
477
Participants Below avg headcount
94th
Percentile by assets National rank
$339,226
Avg per participant High balance/head
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Official DOL plan name: Century Aluminum Consolidated Retirement Plan · Sponsored by Century Aluminum Company · Illinois · Manufacturing

$162M in assets, 477 participants

Century Aluminum Company's Century Aluminum Consolidated Retirement Plan reported $162M in total assets and 477 participants in its 2023 DOL Form 5500 filing, ranking in the 94th 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.

  • #16,971 in Manufacturing (18,722 peers)

Where Century Aluminum Consolidated Retirement Plan sits by assets

Century Aluminum Consolidated Retirement Plan sits in the top 10% of all filed plans by assets, $162M for 477 participants (~$339,226/participant), up 2.2% in 2023.

#16,971
in Manufacturing (18,722 peers)
+2.2%
assets growth YoY
1.6×
vs typical plan assets (national mean)

Century Aluminum Consolidated Retirement Plan's outsized position by total assets

Century Aluminum Consolidated Retirement Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$161,810,955 Top 6% higher than 94% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Century Aluminum Consolidated Retirement Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Century Aluminum Consolidated Retirement Plan sits mid-pack in the medium band (477 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Century Aluminum Consolidated Retirement Plan reported net income rose from -$76M in the plan year 2022 filing to $3M in the plan year 2023 filing.
  • Century Aluminum Consolidated Retirement Plan reported participants fell from 516 in the plan year 2022 filing to 477 in the plan year 2023 filing.
  • Century Aluminum Consolidated Retirement Plan end-of-year assets rose from $158M in the plan year 2022 filing to $162M in the plan year 2023 filing.

See the national 2022→2023 release diff →

EBSA filing schedule strip

Filing strip 133070826 · Century Aluminum Company PY 2023 · Defined Benefit (Pension)

Century Aluminum Consolidated Retirement Plan · $162M · 477 · 94th

  • NET $162M
  • BOOK 477
  • VS-ST 94th
  • BOY Defined Benefit (Pension)
  • SCH near Magna U.S. Consolidated Pension Plan
  • EBSA ind #16971

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 Manufacturing retirement plans → · Plans in Illinois →

Century Aluminum Consolidated Retirement Plan in the asset neighbourhood

Cement Masons Local 780 Pension FundCement Masons Local 780 Pens…$162MBanco Santander USA Offices Retirement PlanBanco Santander USA Offices …$162MMagna U.S. Consolidated Pension PlanMagna U.S. Consolidated Pens…$162MCentury Aluminum Consolidated Retirement PlanCentury Aluminum Consolidate…$162MCnh Industrial U.S. Pension PlanCnh Industrial U.S. Pension …$161M
End-of-year total assets ($M) among Century Aluminum Consolidated Retirement Plan and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$158M
Net Assets (End of Year)$162M
Net Income$3M
Employer EIN133070826
Plan Effective Date1989-02-07
Filing StatusFILING RECEIVED

Sponsor Plan History (Century Aluminum Company)

Sponsor-wide plan assets over time

All Century Aluminum Company plans reported in each filing year

Latest sponsor-wide plan assets
$305M 11.384756334413273% vs 2022
2024 filing year
$270M$280M$290M$300M$310M 202220232024 $274M $305M ▲ +11.4%
Year Plans Participants Total Assets
2022 2 2,495 $274M
2023 2 1,900 $295M
2024 2 1,883 $305M

Nearby Defined Benefit (Pension) Plans in Illinois

Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.

Century Aluminum Consolidated Retirement Plan vs. nearby Defined Benefit (Pension) plans in Illinois, assets vs. participants Scatter plot of 6 data points. -200000200004000060000 -200204060 Total assets ($B) Participants Century Aluminum Consolidated Retirement Plan, Total assets ($B): 0.161810955 · Participants: 477Century Aluminum Consolidated Retirement PlanCentral States, Southeast & Southwest Areas Pension Plan, Total assets ($B): 49.680270595 · Participants: 48538Central States, Southeast & Southwest Areas Pension PlanState Farm Insurance Companies Retirement Plan for United States Employees, Total assets ($B): 35.242945747 · Participants: 45001State Farm Insurance Companies Retirement Plan for United States EmployeesUnited Food & Commercial Workers Intl Union - Industry Pension Fund, Total assets ($B): 7.965094339 · Participants: 20680United Food & Commercial Workers Intl Union - Industry Pension FundJohn Deere Pension Plan for Salaried Employees, Total assets ($B): 7.960744597 · Participants: 16346John Deere Pension Plan for Salaried EmployeesAbbott Laboratories Annuity Retirement Plan, Total assets ($B): 7.819798504 · Participants: 17382Abbott Laboratories Annuity Retirement Plan
Century Aluminum Consolidated Retirement Plan vs. nearby Defined Benefit (Pension) plans in Illinois, assets vs. participants
Compare Century Aluminum Consolidated Retirement Plan side-by-side with 3 peers →

Century Aluminum Consolidated Retirement Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount

Outside Illinois, the nearest Defined Benefit (Pension) by assets is Magna U.S. Consolidated Pension Plan in ($162M); by covered participants it is Plumbers & Pipefitters Local 123 Pension Fund in FL (477 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($162M here).

Similar participant headcount

Nearest other-state filings by covered participants (477 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Century Aluminum Consolidated Retirement Plan assets move in 2023? ▼
Century Aluminum Consolidated Retirement Plan edged up modestly - up 2.2% during 2023, from $158M to $162M. Reported net income was $3M.
How have Century Aluminum Company plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Century Aluminum Company's sponsor-wide assets grew 11.4%, from $274M to $305M.
Where does Century Aluminum Consolidated Retirement Plan rank by assets among Form 5500 filers? ▼
Century Aluminum Consolidated Retirement Plan ranks in the 94th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 10% of all filed plans by assets).
Which Defined Benefit (Pension) plans are similar in size to Century Aluminum Consolidated Retirement Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by assets is Magna U.S. Consolidated Pension Plan in ($162M, 472 participants).
Which Defined Benefit (Pension) plans cover a similar participant headcount to Century Aluminum Consolidated Retirement Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by covered participants is Plumbers & Pipefitters Local 123 Pension Fund in FL (477 participants, $60M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 133070826.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.