Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001104659-24-007789
Filing Date
2024-01-29
Accepted
2024-01-29 17:01:21
Documents
1

Document Format Files

Seq Description Document Type Size
1 DEFA14A tm244388d2_defa14a.htm DEFA14A 35153
  Complete submission text file 0001104659-24-007789.txt   36212
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)

EIN.: 042726691 | State of Incorp.: MA | Fiscal Year End: 1231
Type: DEFA14A | Act: 34 | File No.: 000-17999 | Film No.: 24574493
SIC: 2834 Pharmaceutical Preparations
(CF Office: 03 Life Sciences)