Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001558370-21-005061
Filing Date
2021-04-28
Accepted
2021-04-28 16:06:59
Documents
3

Document Format Files

Seq Description Document Type Size
1 DEFA14A tmb-20210427xdefa14a.htm DEFA14A 28692
2 GRAPHIC tmb-20210427xdefa14a001.jpg GRAPHIC 128095
3 GRAPHIC tmb-20210427xdefa14a002.jpg GRAPHIC 101702
  Complete submission text file 0001558370-21-005061.txt   346431
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.: 21864251
SIC: 2834 Pharmaceutical Preparations