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Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0000902219-22-000001
Filing Date
2022-01-10
Accepted
2022-01-10 08:37:00
Documents
1

Document Format Files

Seq Description Document Type Size
1 SEC SCHEDULE 13G SEC13G_Filing.htm SC 13G/A 35792
  Complete submission text file 0000902219-22-000001.txt   37661
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: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-40774 | Film No.: 22519854
SIC: 2834 Pharmaceutical Preparations

Mailing Address C/O WELLINGTON MANAGEMENT COMPANY LLP 280 CONGRESS STREET BOSTON MA 02210
Business Address C/O WELLINGTON MANAGEMENT COMPANY LLP 280 CONGRESS STREET BOSTON MA 02210 6179515000
WELLINGTON MANAGEMENT GROUP LLP (Filed by) CIK: 0000902219 (see all company filings)

IRS No.: 042683227 | State of Incorp.: MA | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 0000