Other · DOL Form 5500 · 2022

Uchicago Argonne, LLC Argonne National Laboratory Retirement Plan

Data updated 2026-08-25

$824M
Total assets Above avg plan size
3,058
Participants Above avg headcount
99th
Percentile by assets National rank
$269,395
Avg per participant High balance/head
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Official DOL plan name: Argonne National Laboratory 401(a) Retirement Plan · Sponsored by Uchicago Argonne, LLC Argonne National Laboratory · Illinois · Professional & Technical Services

$824M in assets, 3,058 participants

Uchicago Argonne, LLC Argonne National Laboratory's Argonne National Laboratory 401(a) Retirement Plan reported $824M in total assets and 3,058 participants in its 2022 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.

  • #21,375 in Professional & Technical Services (21,562 peers)

Coverage in Illinois

Argonne National Laboratory 401(a) Retirement Plan covers 3,058 participants in Illinois, 3.9x the typical Illinois plan (state average ~779 per filing). Assets: $824M.

#21,375
in Professional & Technical Services (21,562 peers)
-15.0%
assets change YoY
8.3×
vs typical plan assets (national mean)

The plan reported a net loss of $146M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

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 2022 · DOL Form 5500

$823,809,106 Top 1% higher than 99% of 139,123 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 2022

Argonne National Laboratory 401(a) Retirement Plan's large-plan peer group by participant headcount

Plan-year 2022 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 (3,058 participants).

Plan-year Form 5500 strip

Filing strip 680628477 · Uchicago Argonne, LLC Argonne National Laboratory PY 2022 · Other

Argonne National Laboratory 401(a) Retirement Plan · $824M · 3,058 · 99th

  • 5500 $824M
  • 5500 3,058
  • 5500 99th
  • 5500 Other
  • 5500 near Educational Testing Service 403(b) Retirement Savings Plan
  • 5500 ind #21375

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

Argonne National Laboratory 401(a) Retirement PlanArgonne National Laboratory …$824MEducational Testing Service 403(b) Retirement Savings PlanEducational Testing Service …$822MMulticare Health System 403(b) Employee Savings PlanMulticare Health System 403(…$819M403(b) Retirement Savings Plan for Integris Health, Inc.403(b) Retirement Savings Pl…$814MGeisinger System Services Tax Sheltered Annuity ProgramGeisinger System Services Ta…$810M
End-of-year total assets ($M) among Argonne National Laboratory 401(a) Retirement Plan and nearest nationwide Other peers. Source: DOL Form 5500 plan year 2022.

Illinois filing particulars

Total Assets (Beginning of Year)$969M
Net Assets (End of Year)$824M
Net Income-$146M
Employer EIN680628477
Plan Effective Date1994-01-01
Filing StatusFILING 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
$2.2B$2.4B$2.6B$2.8B 202220232024 $2.25B $2.7B ▲ +20.0%
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.

Argonne National Laboratory 401(a) Retirement Plan vs. nearby Other plans in Illinois, assets vs. participants Scatter plot of 6 data points. 05000100001500020000 02468 Total assets ($B) Participants Argonne National Laboratory 401(a) Retirement Plan, Total assets ($B): 0.823809106 · Participants: 3058Argonne National Laboratory 401(a) Retirement PlanWashington University Retirement Savings Plan, Total assets ($B): 5.876925706 · Participants: 15925Washington University Retirement Savings PlanNorthwestern University Retirement Plan, Total assets ($B): 3.513964211 · Participants: 9465Northwestern University Retirement PlanThe University of Chicago Contributory Retirement Plan, Total assets ($B): 3.053434537 · Participants: 4552The University of Chicago Contributory Retirement PlanNorthshore University Healthsystem Tax Deferred Annuity Plan, Total assets ($B): 1.75976664 · Participants: 13159Northshore University Healthsystem Tax Deferred Annuity PlanThe University of Chicago Supplemental Retirement Plan, Total assets ($B): 1.486612106 · Participants: 7855The University of Chicago Supplemental Retirement Plan
Argonne National Laboratory 401(a) Retirement Plan vs. nearby Other plans in Illinois, assets vs. participants
Compare Argonne National Laboratory 401(a) Retirement Plan side-by-side with 3 peers →

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 Educational Testing Service 403(b) Retirement Savings Plan in NJ ($822M); by covered participants it is Independent Support Services, Inc. 403(b) Plan in NY (3,050 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (3,058 participants); asset peers above are excluded.

DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Argonne National Laboratory 401(a) Retirement Plan assets move in 2022? ▼
Argonne National Laboratory 401(a) Retirement Plan declined sharply - down 15.0% during 2022, from $969M to $824M. Reported net income was -$146M.
How have Uchicago Argonne, LLC Argonne National Laboratory plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Uchicago Argonne, LLC Argonne National Laboratory's sponsor-wide assets grew 19.7%, from $2.3B to $2.7B.
Where does Argonne National Laboratory 401(a) Retirement Plan rank by assets among Form 5500 filers? ▼
Argonne National Laboratory 401(a) Retirement Plan ranks in the 99th percentile by end-of-year assets among 139,126 plans that reported assets for plan year 2022 (among the largest 1% of all filed plans).
Which Other plans are similar in size to Argonne National Laboratory 401(a) Retirement Plan? ▼
Among Other plans in other states, the closest by assets is Educational Testing Service 403(b) Retirement Savings Plan in NJ ($822M, 3,797 participants).
Which Other plans cover a similar participant headcount to Argonne National Laboratory 401(a) Retirement Plan? ▼
Among Other plans in other states, the closest by covered participants is Independent Support Services, Inc. 403(b) Plan in NY (3,050 participants, $8M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2022.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 680628477.

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.