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Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001558370-23-006883
Filing Date
2023-04-26
Accepted
2023-04-26 17:01:45
Documents
3

Document Format Files

Seq Description Document Type Size
1 DEFA14A tmb-20230426xdefa14a.htm DEFA14A 16940
2 GRAPHIC tmb-20230426xdefa14a_bg001.jpg GRAPHIC 159848
3 GRAPHIC tmb-20230426xdefa14a_bg002.jpg GRAPHIC 129071
  Complete submission text file 0001558370-23-006883.txt   416103
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.: 23850635
SIC: 2834 Pharmaceutical Preparations
Office of Life Sciences