Form 424B5 - Prospectus [Rule 424(b)(5)]:
SEC Accession No. 0001047469-11-005372
Filing Date
2011-05-20
Accepted
2011-05-19 18:04:42
Documents
3

Document Format Files

Seq Description Document Type Size
1 424B5 a2204256z424b5.htm 424B5 331552
2 G542544.JPG g542544.jpg GRAPHIC 17494
3 G957884.JPG g957884.jpg GRAPHIC 12102
  Complete submission text file 0001047469-11-005372.txt   373525
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: 0630
Type: 424B5 | Act: 33 | File No.: 333-174335 | Film No.: 11859183
SIC: 2834 Pharmaceutical Preparations