Company · CIK 855654 # ImmunoGen, Inc. | CIK | [855654](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000855654) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2834 — Pharmaceutical Preparations | | Incorporated in | MA | | Business address | MA | | Listed | no ticker on SEC record today | | First annual or quarterly report | 1995-05-15 | ## Offerings 8 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-251502 | Shelf Effective | 2020-12-18 | 2023-05-05 | 7 | | 333-223507 | Shelf Effective | 2018-03-07 | 2020-09-25 | 6 | | 333-216438 | Shelf Effective | 2017-03-03 | 2017-10-06 | 5 | | 333-206621 | Shelf Effective | 2015-08-27 | 2015-08-27 | 1 | | 333-174335 | Shelf Effective | 2011-05-19 | 2012-07-12 | 5 | | 333-165981 | Shelf Effective | 2010-04-09 | 2010-05-07 | 4 | | 333-144488 | Shelf Effective | 2007-07-11 | 2009-06-18 | 5 | | 333-152502 | Shelf Effective | 2008-07-24 | 2008-08-06 | 2 | ## Filings 35 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2023-05-05 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465923056608/0001104659-23-056608-index.htm) Shelf takedown | 333-251502 | 0001104659-23-056608 | | 2023-05-03 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465923055486/0001104659-23-055486-index.htm) Shelf takedown | 333-251502 | 0001104659-23-055486 | | 2021-12-03 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465921146340/0001104659-21-146340-index.htm) Shelf takedown | 333-251502 | 0001104659-21-146340 | | 2021-11-30 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465921145026/0001104659-21-145026-index.htm) Shelf takedown | 333-251502 | 0001104659-21-145026 | | 2021-08-12 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465921103845/0001104659-21-103845-index.htm) Shelf takedown | 333-251502 | 0001104659-21-103845 | | 2020-12-18 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465920137497/0001104659-20-137497-index.htm) Shelf takedown | 333-251502 | 0001104659-20-137497 | | 2020-12-18 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/855654/000110465920137461/0001104659-20-137461-index.htm) Shelf registered | 333-251502 | 0001104659-20-137461 | | 2020-09-25 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000110465920108918/0001104659-20-108918-index.htm) Shelf takedown | 333-223507 | 0001104659-20-108918 | | 2020-01-23 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746920000445/0001047469-20-000445-index.htm) Shelf takedown | 333-223507 | 0001047469-20-000445 | | 2020-01-22 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746920000389/0001047469-20-000389-index.htm) Shelf takedown | 333-223507 | 0001047469-20-000389 | | 2018-06-07 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746918004326/0001047469-18-004326-index.htm) Shelf takedown | 333-223507 | 0001047469-18-004326 | | 2018-06-05 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746918004273/0001047469-18-004273-index.htm) Shelf takedown | 333-223507 | 0001047469-18-004273 | | 2018-03-07 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/855654/000104746918001375/0001047469-18-001375-index.htm) Shelf registered | 333-223507 | 0001047469-18-001375 | | 2017-10-06 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746917006261/0001047469-17-006261-index.htm) Shelf takedown | 333-216438 | 0001047469-17-006261 | | 2017-10-04 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746917006213/0001047469-17-006213-index.htm) Shelf takedown | 333-216438 | 0001047469-17-006213 | | 2017-05-11 | [EFFECT](https://www.sec.gov/Archives/edgar/data/855654/999999999517001251/9999999995-17-001251-index.htm) Declared effective | 333-216438 | 9999999995-17-001251 | | 2017-05-11 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746917003364/0001047469-17-003364-index.htm) Shelf takedown | 333-216438 | 0001047469-17-003364 | | 2017-03-03 | [S-3](https://www.sec.gov/Archives/edgar/data/855654/000104746917001245/0001047469-17-001245-index.htm) Shelf registered | 333-216438 | 0001047469-17-001245 | | 2015-08-27 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/855654/000104746915007009/0001047469-15-007009-index.htm) Shelf registered | 333-206621 | 0001047469-15-007009 | | 2012-07-12 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746912007170/0001047469-12-007170-index.htm) Shelf takedown | 333-174335 | 0001047469-12-007170 | | 2012-07-12 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746912007150/0001047469-12-007150-index.htm) Shelf takedown | 333-174335 | 0001047469-12-007150 | | 2011-05-20 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746911005410/0001047469-11-005410-index.htm) Shelf takedown | 333-174335 | 0001047469-11-005410 | | 2011-05-20 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746911005372/0001047469-11-005372-index.htm) Shelf takedown | 333-174335 | 0001047469-11-005372 | | 2011-05-19 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/855654/000104746911005357/0001047469-11-005357-index.htm) Shelf registered | 333-174335 | 0001047469-11-005357 | | 2010-05-07 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746910004936/0001047469-10-004936-index.htm) Shelf takedown | 333-165981 | 0001047469-10-004936 | | 2010-05-06 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746910004845/0001047469-10-004845-index.htm) Shelf takedown | 333-165981 | 0001047469-10-004845 | | 2010-04-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/855654/999999999510001146/9999999995-10-001146-index.htm) Declared effective | 333-165981 | 9999999995-10-001146 | | 2010-04-09 | [S-3](https://www.sec.gov/Archives/edgar/data/855654/000104746910003577/0001047469-10-003577-index.htm) Shelf registered | 333-165981 | 0001047469-10-003577 | | 2009-06-18 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746909006421/0001047469-09-006421-index.htm) Shelf takedown | 333-144488 | 0001047469-09-006421 | | 2009-06-17 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746909006407/0001047469-09-006407-index.htm) Shelf takedown | 333-144488 | 0001047469-09-006407 | | 2008-08-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/855654/999999999508002449/9999999995-08-002449-index.htm) Declared effective | 333-152502 | 9999999995-08-002449 | | 2008-07-24 | [S-3](https://www.sec.gov/Archives/edgar/data/855654/000110465908047441/0001104659-08-047441-index.htm) Shelf registered | 333-152502 | 0001104659-08-047441 | | 2008-06-24 | [424B5](https://www.sec.gov/Archives/edgar/data/855654/000104746908007656/0001047469-08-007656-index.htm) Shelf takedown | 333-144488 | 0001047469-08-007656 | | 2007-08-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/855654/999999999507003290/9999999995-07-003290-index.htm) Declared effective | 333-144488 | 9999999995-07-003290 | | 2007-07-11 | [S-3](https://www.sec.gov/Archives/edgar/data/855654/000110465907053379/0001104659-07-053379-index.htm) Shelf registered | 333-144488 | 0001104659-07-053379 | [All filings of this company](https://equitycapital.markets/filings?cik=855654) · [CSV](https://equitycapital.markets/filings.csv?cik=855654) --- Source page: https://equitycapital.markets/company/855654 · Data: U.S. SEC EDGAR · CC BY 4.0