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Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0001104659-10-019081
Filing Date
2010-04-09
Accepted
2010-04-09 13:49:49
Documents
1

Document Format Files

Seq Description Document Type Size
1 SC 13G a10-7880_1sc13g.htm SC 13G 72041
  Complete submission text file 0001104659-10-019081.txt   73815
Mailing Address 225 SOUTH LAKE AVE SUITE 400 PASADENA CA 91101
Business Address 225 SOUTH LAKE AVE STE 400 PASADENA CA 91101-3005 8183049222
PRIMECAP MANAGEMENT CO/CA/ (Filed by) CIK: 0000763212 (see all company filings)

IRS No.: 953868081
Type: SC 13G

Mailing Address 830 WINTER ST WALTHAM MA 02451
Business Address 830 WINTER ST WALTHAM MA 02451 (781)895-0600
IMMUNOGEN INC (Subject) CIK: 0000855654 (see all company filings)

IRS No.: 042726691 | State of Incorp.: MA | Fiscal Year End: 0630
Type: SC 13G | Act: 34 | File No.: 005-40774 | Film No.: 10742070
SIC: 2834 Pharmaceutical Preparations