Uchicago Argonne, LLC Argonne National Laboratory Retirement Plan

Other · DOL Form 5500 · 2023

What the Filing Says About Argonne National Laboratory 401(a) Retirement Plan

Argonne National Laboratory 401(a) Retirement Plan is an Other retirement plan sponsored by Uchicago Argonne, LLC Argonne National Laboratory, headquartered in Illinois. According to the U.S. Department of Labor's 2023 Form 5500 filing, the plan reports $942M in total end-of-year assets and covers 3,096 participants across the Professional & Technical Services industry. The sponsor's EIN on file with the U.S. Department of Labor is 680628477, and the plan has been effective since 1994-01-01. Its filing status is currently FILING RECEIVED.

Year over year, total assets grew at a solid clip from $824M at the beginning of 2023 to $942M at year-end - up 14.4%. Net assets (after liabilities) closed the year at $942M, with reported net income of $119M driven by investment returns, contributions received, and benefit payments during the period. These figures reflect what the plan administrator certified on Schedule H or Schedule I of the Form 5500 annual return and can be compared against 2 prior plan-year filings from the same sponsor shown below.

Across the 3 plan years Uchicago Argonne, LLC Argonne National Laboratory has on file with PlainRetire (2022-2024), sponsor-wide plan assets have moved from $2.3B to $2.7B, a gain of 19.7%, while reported participants moved from 6,722 to 7,243 (+7.8%). The strongest year on file by total sponsor assets was 2024 at $2.7B; the softest was 2022 at $2.3B. Year-by-year, sponsor-wide filings show: 2022 - $2.3B in assets across 2 plans covering 6,722 participants; 2023 - $2.5B in assets across 2 plans covering 6,894 participants; 2024 - $2.7B in assets across 2 plans covering 7,243 participants.

By assets, Argonne National Laboratory 401(a) Retirement Plan outranks 99% of the 126,618 plans that filed a Form 5500 for the 2023 plan year, and holds roughly 9.4x the national average plan size of $100M and 730 average participants.

Asset totals and participant counts reflect a single plan year snapshot and can change materially with market conditions, plan mergers, or workforce changes. Fields such as "net income" include both realized investment performance and contribution/distribution flows, a single-year figure does not by itself indicate plan health or participant outcomes. This page summarizes public DOL disclosures for research and educational purposes only and is not retirement, tax, legal, or financial advice. Before making decisions about your own retirement benefits or evaluating an employer's plan, verify the underlying filing directly via the DOL EFAST2 system and consult a qualified professional.

How the percentile is calculated: we count every plan that filed a 2023 Form 5500 with a reported end-of-year asset figure (126,618 plans), rank Argonne National Laboratory 401(a) Retirement Plan against all of them by total assets, and report the share of those plans it outranks. A plan reporting no asset figure for the year is excluded from the ranking rather than assumed to be zero.