EntityWire

EntityWire / EIN 04-2726691

Employer with a benefit plan

IMMUNOGEN, INC.

EIN 04-2726691. What DOL Form 5500 filings (EFAST2) and SEC EDGAR company filings say about this entity, with the source and date on every fact. Latest record 2025-10-14.

Employer with a benefit plan ยท SEC filer

IMMUNOGEN, INC.

830 WINTER STREET, WALTHAM, MA 02451

EIN

04-2726691

Benefit plan 1, 2024 filing

IMMUNOGEN, INC. 401(K) PLAN AND TRUST

DOL · 2025-10-14

Participants (start of year)

541

DOL · 2025-10-14

Plan features

code 2F2G2J2K2S2T2E3D

DOL · 2025-10-14

Plan type

Single-employer plan

DOL · 2025-10-14

Business code (NAICS)

541700

DOL · 2025-10-14

Benefit plan 501, 2024 filing

IMMUNOGEN, INC. WELFARE BENEFIT PLAN

DOL · 2025-09-24

Participants (start of year)

283

DOL · 2025-09-24

Plan features

code 4A4B4D4E4G4H4L4Q

DOL · 2025-09-24

Plan type

Single-employer plan

DOL · 2025-09-24

Business code (NAICS)

541700

DOL · 2025-09-24

Benefit plan 503, 2024 filing

IMMUNOGEN, INC. SEVERANCE PAY PLAN FOR ALL EMPLOYEES

DOL · 2025-09-24

Participants (start of year)

295

DOL · 2025-09-24

Plan features

Severance pay

DOL · 2025-09-24

Plan type

Single-employer plan

DOL · 2025-09-24

From DOL Form 5500 filings (EFAST2) · SEC EDGAR company filings. Latest record 2025-10-14.

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