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Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001558370-20-004450
Filing Date
2020-04-28
Accepted
2020-04-28 11:46:33
Documents
5
Effectiveness Date
2020-04-28

Document Format Files

Seq Description Document Type Size
1 DEFA14A tmb-20200428xdefa14a.htm DEFA14A 42946
2 GRAPHIC tmb-20200428xdefa14ag001.jpg GRAPHIC 41647
3 GRAPHIC tmb-20200428xdefa14ag002.jpg GRAPHIC 76933
4 GRAPHIC tmb-20200428xdefa14ag003.jpg GRAPHIC 19384
5 GRAPHIC tmb-20200428xdefa14ag004.jpg GRAPHIC 8209
  Complete submission text file 0001558370-20-004450.txt   245920
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.: 20823337
SIC: 2834 Pharmaceutical Preparations