Other · DOL Form 5500 · 2023
Uchicago Argonne, LLC Argonne National Laboratory Retirement Plan
Data updated 2026-08-25
- $942M
- Total assets Above avg plan size
- 3,096
- Participants Above avg headcount
- 99th
- Percentile by assets National rank
- $304,395
- Avg per participant High balance/head
Official DOL plan name: Argonne National Laboratory 401(a) Retirement Plan · Sponsored by Uchicago Argonne, LLC Argonne National Laboratory · Illinois · Professional & Technical Services
$942M in assets, 3,096 participants
Uchicago Argonne, LLC Argonne National Laboratory's Argonne National Laboratory 401(a) Retirement Plan reported $942M in total assets and 3,096 participants in its 2023 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.
- #20,126 in Professional & Technical Services (20,321 peers)
Coverage in Illinois
Argonne National Laboratory 401(a) Retirement Plan covers 3,096 participants in Illinois, 4.0x the typical Illinois plan (state average ~779 per filing). Assets: $942M.
- #20,126
- in Professional & Technical Services (20,321 peers)
- +14.4%
- assets growth YoY
- 9.5×
- vs typical plan assets (national mean)
Argonne National Laboratory 401(a) Retirement Plan's outsized position by total assets
Argonne National Laboratory 401(a) Retirement Plan vs every filed plan by assets
End-of-year total assets · plan year 2023 · DOL Form 5500
$942,407,862 Top 1% higher than 99% of 127,068 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023
Argonne National Laboratory 401(a) Retirement Plan's large-plan peer group by participant headcount
Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Argonne National Laboratory 401(a) Retirement Plan lands in the large band (3,096 participants).
What changed between DOL Form 5500 filings
plan year 2022 → plan year 2023
- Argonne National Laboratory 401(a) Retirement Plan reported net income rose from -$146M in the plan year 2022 filing to $119M in the plan year 2023 filing.
- Argonne National Laboratory 401(a) Retirement Plan end-of-year assets rose from $824M in the plan year 2022 filing to $942M in the plan year 2023 filing.
- Argonne National Laboratory 401(a) Retirement Plan reported participants rose from 3,058 in the plan year 2022 filing to 3,096 in the plan year 2023 filing.
Plan-year Form 5500 strip
Filing strip 680628477 · Uchicago Argonne, LLC Argonne National Laboratory PY 2023 · Other
Argonne National Laboratory 401(a) Retirement Plan · $942M · 3,096 · 99th
- BOY $942M
- BOY 3,096
- BOY 99th
- BOY Other
- BOY near Geisinger System Services Tax Sheltered Annuity Program
- BOY ind #20126
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 Illinois →
Argonne National Laboratory 401(a) Retirement Plan in the asset neighbourhood
Illinois filing particulars
| Total Assets (Beginning of Year) | $824M |
|---|---|
| Net Assets (End of Year) | $942M |
| Net Income | $119M |
| Employer EIN | 680628477 |
| Plan Effective Date | 1994-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Uchicago Argonne, LLC Argonne National Laboratory)
Sponsor-wide plan assets over time
All Uchicago Argonne, LLC Argonne National Laboratory plans reported in each filing year
- Latest sponsor-wide plan assets
- $2.7B 19.697212020907916% vs 2022
- 2024 filing year
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 2 | 6,722 | $2.3B |
| 2023 | 2 | 6,894 | $2.5B |
| 2024 | 2 | 7,243 | $2.7B |
Nearby Other Plans in Illinois
Peer Other plans, same state, same plan type, ranked by total assets.
- Northwestern University Retirement Plan $4.0B · 9,440
- The University of Chicago Contributory Retirement Plan $3.5B · 4,796
- Endeavor Health Legacy 403(b) Tax Deferred Annuity Plan for Northshore University Healthsystem Employees $2.0B · 13,705
- The University of Chicago Supplemental Retirement Plan $1.7B · 8,254
- Argonne National Laboratory 403(b) Employee Retirement Plan $1.6B · 3,798
Argonne National Laboratory 401(a) Retirement Plan's out-of-state Other peers by assets and headcount
Outside Illinois, the nearest Other by assets is Geisinger System Services Tax Sheltered Annuity Program in PA ($937M); by covered participants it is Wake Forest University Retirement Plan in NC (3,092 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($942M here).
- Geisinger System Services Tax Sheltered Annuity Program (PA) $937M · 24,191
- Educational Testing Service 403(b) Retirement Savings Plan (NJ) $929M · 3,243
- 403(b) Retirement Savings Plan for Integris Health, Inc. (OK) $957M · 10,744
- The Research Foundation for Suny Optional Retirement Plan (NY) $960M · 4,423
Similar participant headcount
Nearest other-state filings by covered participants (3,096 participants); asset peers above are excluded.
- Wake Forest University Retirement Plan (NC) 3,092 · 4 off
- Goodwill of North Georgia, Inc Tax Deferred Annuity Plan (GA) 3,083 · 13 off
- San Diego Zoo Wildlife Alliance 403(b) Plan (CA) 3,079 · 17 off
- Iatse Local 127 Pension Plan (TX) 3,065 · 31 off
DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.