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Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001104659-24-002244
Filing Date
2024-01-08
Accepted
2024-01-08 16:12:49
Documents
1

Document Format Files

Seq Description Document Type Size
1 DEFA14A tm242353d1_defa14a.htm DEFA14A 36312
  Complete submission text file 0001104659-24-002244.txt   37371
Mailing Address 830 WINTER ST WALTHAM MA 02451
Business Address 830 WINTER ST WALTHAM MA 02451 (781)895-0600
ImmunoGen, Inc. (Filer) CIK: 0000855654 (see all company filings)

IRS No.: 042726691 | State of Incorp.: MA | Fiscal Year End: 1231
Type: DEFA14A | Act: 34 | File No.: 000-17999 | Film No.: 24520228
SIC: 2834 Pharmaceutical Preparations
(CF Office: 03 Life Sciences)