OpenERISA

Immunogen, INC.

Waltham, MA, 02451

EIN 04-2726691
Plans
3
Total participants
2,640
Filing years
2024, 2025, 2023, 2022, 2021, 2020
NAICS
541700
Plan sponsors in MassachusettsProfessional, Scientific & Technical Services

Benefit plans on file

YearFormPlan #Plan nameParticipants
2025Form 5500001Immunogen, INC. 401(K) Plan And Trust0
2024Form 5500001Immunogen, INC. 401(K) Plan And Trust225
2024Form 5500501Immunogen, INC. Welfare Benefit Plan233
2024Form 5500503Immunogen, INC. Severance Pay Plan For All Employees233
2023Form 5500001Immunogen, INC. 401(K) Plan And Trust295
2023Form 5500501Immunogen, INC. Welfare Benefit Plan282
2023Form 5500503Immunogen, INC. Severance Pay Plan For All Employees295
2022Form 5500001Immunogen, INC. 401(K) Plan And Trust276
2022Form 5500501Immunogen, INC. Welfare Benefit Plan259
2022Form 5500503Immunogen, INC. Severance Pay Plan For All Employees277
2021Form 5500001Immunogen, INC. 401(K) Plan And Trust106
2020Form 5500001Immunogen, INC. 401(K) Plan And Trust79
2020Form 5500501Immunogen, INC. Welfare Benefit Plan80

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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