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Uchicago Argonne, LLC Argonne National Laboratory

Lemont, IL, 60439

EIN 68-0628477
Plans
5
Total participants
74,885
Filing years
2024, 2023, 2022, 2021, 2020
NAICS
541700
Plan sponsors in IllinoisProfessional, Scientific & Technical Services

Benefit plans on file

YearFormPlan #Plan nameParticipants
2024Form 5500005Argonne National Laboratory 403(B) Employee Retirement Plan4,072
2024Form 5500009Argonne National Laboratory 401(A) Retirement Plan3,299
2024Form 5500501Argonne National Laboratory Master Welfare Plan3,896
2024Form 5500521Argonne National Laboratory Severance Plan 5213,299
2024Form 5500533Argonne Retiree Health Reimbursement Account1,997
2023Form 5500005Argonne National Laboratory 403(B) Employee Retirement Plan3,981
2023Form 5500009Argonne National Laboratory 401(A) Retirement Plan3,262
2023Form 5500501Argonne National Laboratory Master Welfare Plan3,556
2023Form 5500521Argonne National Laboratory Severance Plan 5213,242
2023Form 5500533Argonne Retiree Health Reimbursement Account2,008
2022Form 5500005Argonne National Laboratory 403(B) Employee Retirement Plan3,798
2022Form 5500009Argonne National Laboratory 401(A) Retirement Plan3,096
2022Form 5500501Argonne National Laboratory Master Welfare Plan3,702
2022Form 5500521Argonne National Laboratory Severance Plan 5213,112
2022Form 5500533Argonne Retiree Health Reimbursement Account2,048
2021Form 5500005Argonne National Laboratory 403(B) Employee Retirement Plan3,664
2021Form 5500009Argonne National Laboratory 401(A) Retirement Plan3,058
2021Form 5500501Argonne National Laboratory Master Welfare Plan3,574
2021Form 5500521Argonne National Laboratory Severance Plan 5213,019
2021Form 5500533Argonne Retiree Health Reimbursement Account0
2020Form 5500005Argonne National Laboratory 403(B) Employee Retirement Plan3,615
2020Form 5500009Argonne National Laboratory 401(A) Retirement Plan3,043
2020Form 5500501Argonne National Laboratory Master Welfare Plan3,535
2020Form 5500521Argonne National Laboratory Severance Plan 5213,009
2020Form 5500533Argonne Retiree Health Reimbursement Account—

Data shown as filed with the U.S. Department of Labor (EBSA), filing years 2020–2025; not validated by OpenERISA. View official filings for this EIN on the DOL EFAST2 search.

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