ImmunoGen, Inc. SEC EDGAR Filings (CIK 0000855654)

SEC EDGAR filings, ownership reports, and insider transactions for ImmunoGen, Inc..

Industry
Pharmaceutical Preparations (Office Of Life Sciences)
Business address
830 Winter St, Waltham, MA, 02451
State of incorporation
MA
Fiscal year end
31 December
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ImmunoGen, Inc. has filed 1,766 SEC EDGAR filings since 14 Feb 1994

Latest Filings

Recent SEC filings for ImmunoGen, Inc. including 15-12G, SC 13G/A, 4 and more.

Form type Document Filing Description Filing date Reporting date File number(s)
15-12G Open 15-12G document View SEC filing for 15-12G 15-12G 22 Feb 2024 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2024 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2024 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 13 Feb 2024 005-40774
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 12 Feb 2024 12 Feb 2024
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-271524
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-271523
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-266452
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-266451
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-258631
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-258629
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-253753
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-251548
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-235633
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-235632
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-225860
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-225281
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-215196
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-185086
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-170788
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-155540
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-147738
S-8 POS Open S-8 POS document View SEC filing for S-8 POS S-8 POS 12 Feb 2024 333-138713
25-NSE Open 25-NSE document View SEC filing for 25-NSE 12 Feb 2024 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 12 Feb 2024 12 Feb 2024 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 08 Feb 2024 07 Feb 2024 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A IMMUNOGEN, INC. 07 Feb 2024 005-40774
4 Open 4 document View SEC filing for 4 06 Feb 2024 02 Feb 2024
4 Open 4 document View SEC filing for 4 06 Feb 2024 02 Feb 2024
4 Open 4 document View SEC filing for 4 06 Feb 2024 02 Feb 2024
4 Open 4 document View SEC filing for 4 06 Feb 2024 02 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 05 Feb 2024 01 Feb 2024
144 Open 144 document View SEC filing for 144 05 Feb 2024 000-17999
144 Open 144 document View SEC filing for 144 05 Feb 2024 000-17999
144 Open 144 document View SEC filing for 144 05 Feb 2024 000-17999
144 Open 144 document View SEC filing for 144 05 Feb 2024 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 31 Jan 2024 31 Jan 2024 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 29 Jan 2024 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 29 Jan 2024 29 Jan 2024 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 25 Jan 2024 005-40774
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 24 Jan 2024 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 24 Jan 2024 24 Jan 2024 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 22 Jan 2024 005-40774
4 Open 4 document View SEC filing for 4 18 Jan 2024 16 Jan 2024
144 Open 144 document View SEC filing for 144 16 Jan 2024 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 08 Jan 2024 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 08 Jan 2024 08 Jan 2024 000-17999
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
4 Open 4 document View SEC filing for 4 03 Jan 2024 29 Dec 2023
DEFM14A Open DEFM14A document View SEC filing for DEFM14A DEFM14A 02 Jan 2024 000-17999
4 Open 4 document View SEC filing for 4 27 Dec 2023 22 Dec 2023
144 Open 144 document View SEC filing for 144 26 Dec 2023 000-17999
PREM14A Open PREM14A document View SEC filing for PREM14A PREM14A 21 Dec 2023 31 Jan 2024 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 21 Dec 2023 000-17999
4/A Open 4/A document View SEC filing for 4/A 19 Dec 2023 22 Sep 2023
4 Open 4 document View SEC filing for 4 19 Dec 2023 15 Dec 2023
144 Open 144 document View SEC filing for 144 15 Dec 2023 000-17999
4 Open 4 document View SEC filing for 4 05 Dec 2023 30 Nov 2023
4 Open 4 document View SEC filing for 4 05 Dec 2023 30 Nov 2023
4 Open 4 document View SEC filing for 4 01 Dec 2023 29 Nov 2023
144 Open 144 document View SEC filing for 144 01 Dec 2023 000-17999
144 Open 144 document View SEC filing for 144 30 Nov 2023 000-17999
144 Open 144 document View SEC filing for 144 30 Nov 2023 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 30 Nov 2023 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 30 Nov 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 30 Nov 2023 30 Nov 2023 000-17999
144 Open 144 document View SEC filing for 144 29 Nov 2023 000-17999
4 Open 4 document View SEC filing for 4 17 Nov 2023 15 Nov 2023
4 Open 4 document View SEC filing for 4 17 Nov 2023 15 Nov 2023
144 Open 144 document View SEC filing for 144 17 Nov 2023 000-17999
144 Open 144 document View SEC filing for 144 16 Nov 2023 000-17999
144 Open 144 document View SEC filing for 144 15 Nov 2023 000-17999
144 Open 144 document View SEC filing for 144 15 Nov 2023 000-17999
4 Open 4 document View SEC filing for 4 08 Nov 2023 07 Nov 2023
4 Open 4 document View SEC filing for 4 08 Nov 2023 06 Nov 2023
4 Open 4 document View SEC filing for 4 08 Nov 2023 07 Nov 2023
144 Open 144 document View SEC filing for 144 07 Nov 2023 000-17999
144 Open 144 document View SEC filing for 144 06 Nov 2023 000-17999
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 02 Nov 2023 30 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 02 Nov 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Nov 2023 02 Nov 2023 000-17999
4 Open 4 document View SEC filing for 4 01 Nov 2023 30 Oct 2023
144 Open 144 document View SEC filing for 144 30 Oct 2023 000-17999
4 Open 4 document View SEC filing for 4 18 Oct 2023 16 Oct 2023
144 Open 144 document View SEC filing for 144 16 Oct 2023 000-17999
4 Open 4 document View SEC filing for 4 02 Oct 2023 29 Sep 2023
4 Open 4 document View SEC filing for 4 02 Oct 2023 29 Sep 2023
4 Open 4 document View SEC filing for 4 02 Oct 2023 29 Sep 2023
4 Open 4 document View SEC filing for 4 26 Sep 2023 22 Sep 2023
4 Open 4 document View SEC filing for 4 19 Sep 2023 18 Sep 2023
3 Open 3 document View SEC filing for 3 19 Sep 2023 18 Sep 2023
4 Open 4 document View SEC filing for 4 19 Sep 2023 15 Sep 2023
144 Open 144 document View SEC filing for 144 19 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 18 Sep 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Sep 2023 18 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 15 Sep 2023 000-17999
4 Open 4 document View SEC filing for 4 14 Sep 2023 13 Sep 2023
4 Open 4 document View SEC filing for 4 14 Sep 2023 13 Sep 2023
4 Open 4 document View SEC filing for 4 14 Sep 2023 12 Sep 2023
144 Open 144 document View SEC filing for 144 13 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 13 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 13 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 11 Sep 2023 000-17999
4 Open 4 document View SEC filing for 4 11 Sep 2023 08 Sep 2023
144 Open 144 document View SEC filing for 144 06 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 01 Sep 2023 000-17999
144 Open 144 document View SEC filing for 144 31 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 30 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 29 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 28 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 25 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 24 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 23 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 22 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 21 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 18 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 17 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 16 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 15 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 14 Aug 2023 000-17999
4 Open 4 document View SEC filing for 4 11 Aug 2023 09 Aug 2023
144 Open 144 document View SEC filing for 144 09 Aug 2023 000-17999
4 Open 4 document View SEC filing for 4 04 Aug 2023 02 Aug 2023
4 Open 4 document View SEC filing for 4 04 Aug 2023 02 Aug 2023
4 Open 4 document View SEC filing for 4 04 Aug 2023 02 Aug 2023
144 Open 144 document View SEC filing for 144 04 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 04 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 03 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 02 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 02 Aug 2023 000-17999
144 Open 144 document View SEC filing for 144 02 Aug 2023 000-17999
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 31 Jul 2023 30 Jun 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Jul 2023 31 Jul 2023 000-17999
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 05 Jul 2023 30 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
4 Open 4 document View SEC filing for 4 16 Jun 2023 14 Jun 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 16 Jun 2023 14 Jun 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 May 2023 04 May 2023 000-17999
424B5 Open 424B5 document View SEC filing for 424B5 424B5 05 May 2023 333-251502
144 Open 144 document View SEC filing for 144 05 May 2023 000-17999
424B5 Open 424B5 document View SEC filing for 424B5 424B5 03 May 2023 333-251502
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 May 2023 03 May 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 02 May 2023 01 May 2023 000-17999
4 Open 4 document View SEC filing for 4 02 May 2023 28 Apr 2023
3 Open 3 document View SEC filing for 3 02 May 2023 24 Apr 2023
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 28 Apr 2023 333-271524
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 28 Apr 2023 333-271523
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 28 Apr 2023 31 Mar 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Apr 2023 28 Apr 2023 000-17999
ARS Open ARS document View SEC filing for ARS ARS 26 Apr 2023 31 Dec 2022 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 26 Apr 2023 000-17999
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 26 Apr 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Apr 2023 06 Apr 2023 000-17999
4 Open 4 document View SEC filing for 4 04 Apr 2023 31 Mar 2023
4 Open 4 document View SEC filing for 4 04 Apr 2023 31 Mar 2023
4 Open 4 document View SEC filing for 4 04 Apr 2023 31 Mar 2023
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 01 Mar 2023 31 Dec 2022 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Mar 2023 01 Mar 2023 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Mar 2023 28 Feb 2023 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2023 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2023 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Feb 2023 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 09 Feb 2023 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 09 Feb 2023 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 08 Feb 2023 005-40774
4 Open 4 document View SEC filing for 4 07 Feb 2023 03 Feb 2023
4 Open 4 document View SEC filing for 4 07 Feb 2023 03 Feb 2023
4 Open 4 document View SEC filing for 4 07 Feb 2023 03 Feb 2023
4 Open 4 document View SEC filing for 4 07 Feb 2023 03 Feb 2023
4 Open 4 document View SEC filing for 4 07 Feb 2023 03 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SEC SCHEDULE 13G 06 Feb 2023 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Feb 2023 005-40774
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 Jan 2023 09 Jan 2023 000-17999
4 Open 4 document View SEC filing for 4 04 Jan 2023 30 Dec 2022
4 Open 4 document View SEC filing for 4 04 Jan 2023 30 Dec 2022
4 Open 4 document View SEC filing for 4 04 Jan 2023 30 Dec 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Jan 2023 04 Jan 2023 000-17999
4 Open 4 document View SEC filing for 4 03 Jan 2023 30 Dec 2022
4 Open 4 document View SEC filing for 4 03 Jan 2023 30 Dec 2022
4 Open 4 document View SEC filing for 4 03 Jan 2023 30 Dec 2022
4 Open 4 document View SEC filing for 4 03 Jan 2023 29 Dec 2022
3 Open 3 document View SEC filing for 3 03 Jan 2023 29 Dec 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Dec 2022 23 Dec 2022 000-17999
4 Open 4 document View SEC filing for 4 27 Dec 2022 22 Dec 2022
4 Open 4 document View SEC filing for 4 27 Dec 2022 20 May 2022
4 Open 4 document View SEC filing for 4 27 Dec 2022 20 May 2022
4 Open 4 document View SEC filing for 4 27 Dec 2022 20 May 2022
4 Open 4 document View SEC filing for 4 27 Dec 2022 20 May 2022
4 Open 4 document View SEC filing for 4 27 Dec 2022 20 May 2022
SC 13G Open SC 13G document View SEC filing for SC 13G IMMUNOGEN, INC. 27 Dec 2022 005-40774
4 Open 4 document View SEC filing for 4 30 Nov 2022 30 Nov 2022
3 Open 3 document View SEC filing for 3 30 Nov 2022 21 Nov 2022
4 Open 4 document View SEC filing for 4 18 Nov 2022 15 Nov 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Nov 2022 14 Nov 2022 000-17999
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Nov 2022 30 Sep 2022 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Nov 2022 04 Nov 2022 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 01 Nov 2022 26 Oct 2022 000-17999
4 Open 4 document View SEC filing for 4 04 Oct 2022 30 Sep 2022
4 Open 4 document View SEC filing for 4 04 Oct 2022 30 Sep 2022
4 Open 4 document View SEC filing for 4 04 Oct 2022 30 Sep 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 31 Aug 2022 31 Aug 2022 000-17999
S-8 Open S-8 document View SEC filing for S-8 S-8 01 Aug 2022 333-266452
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 01 Aug 2022 333-266451
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 01 Aug 2022 30 Jun 2022 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Jul 2022 29 Jul 2022 000-17999
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
4 Open 4 document View SEC filing for 4 05 Jul 2022 30 Jun 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 17 Jun 2022 15 Jun 2022 000-17999
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
4 Open 4 document View SEC filing for 4 17 Jun 2022 15 Jun 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 23 May 2022 20 May 2022 000-17999
SC 13G Open SC 13G document View SEC filing for SC 13G 19 May 2022 005-40774
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 May 2022 31 Mar 2022 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 May 2022 06 May 2022 000-17999
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 26 Apr 2022 000-17999
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 26 Apr 2022 15 Jun 2022 000-17999
4/A Open 4/A document View SEC filing for 4/A FORM 4/A - 20 Apr 2022 31 Mar 2022
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 13 Apr 2022 15 Jun 2022 000-17999
SC 13G Open SC 13G document View SEC filing for SC 13G IMMUNOGEN, INC. 04 Apr 2022 005-40774
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Apr 2022 31 Mar 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Apr 2022 31 Mar 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Apr 2022 31 Mar 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 11 Mar 2022 005-40774
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 28 Feb 2022 31 Dec 2021 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Feb 2022 25 Feb 2022 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 Feb 2022 14 Feb 2022 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2022 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2022 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 10 Feb 2022 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 09 Feb 2022 005-40774
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Feb 2022 04 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Feb 2022 04 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Feb 2022 04 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Feb 2022 04 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Feb 2022 04 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Feb 2022 04 Feb 2022
SC 13G Open SC 13G document View SEC filing for SC 13G 08 Feb 2022 005-40774
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SEC SCHEDULE 13G 10 Jan 2022 005-40774
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Jan 2022 10 Jan 2022 000-17999
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jan 2022 31 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jan 2022 31 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jan 2022 31 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jan 2022 31 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jan 2022 31 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jan 2022 31 Dec 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 03 Dec 2021 01 Dec 2021 000-17999
424B5 Open 424B5 document View SEC filing for 424B5 424B5 03 Dec 2021 333-251502
FWP Open FWP document View SEC filing for FWP FWP 02 Dec 2021 333-251502
424B5 Open 424B5 document View SEC filing for 424B5 424B5 30 Nov 2021 333-251502
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 30 Nov 2021 30 Nov 2021 000-17999
4 Open 4 document View SEC filing for 4 FORM 4 - 17 Nov 2021 15 Nov 2021
3 Open 3 document View SEC filing for 3 FORM 3 - 17 Nov 2021 15 Nov 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 17 Nov 2021 15 Nov 2021
3 Open 3 document View SEC filing for 3 FORM 3 - 17 Nov 2021 15 Nov 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 17 Nov 2021 15 Nov 2021 000-17999
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Oct 2021 30 Sep 2021 000-17999
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Oct 2021 29 Oct 2021 000-17999
4 Open 4 document View SEC filing for 4 FORM 4 - 01 Oct 2021 30 Sep 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 01 Oct 2021 30 Sep 2021
4 Open 4 document View SEC filing for 4 FORM 4 - 23 Sep 2021 22 Sep 2021
3 Open 3 document View SEC filing for 3 FORM 3 - 23 Sep 2021 22 Sep 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 23 Sep 2021 22 Sep 2021 000-17999
4 Open 4 document View SEC filing for 4 FORM 4 - 03 Sep 2021 03 Sep 2021
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SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Oct 2017 005-40774
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Aug 2017 30 Jun 2017 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 16 Jun 2017 13 Jun 2017 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 30 May 2017 26 May 2017 000-17999
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EFFECT Open EFFECT document View SEC filing for EFFECT 11 May 2017 333-216438
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 May 2017 31 Mar 2017 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 23 Jan 2017 17 Jan 2017 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Nov 2016 30 Sep 2016 000-17999
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DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 28 Oct 2016 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 29 Sep 2016 23 Sep 2016 000-17999
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10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 25 Aug 2016 30 Jun 2016 000-17999
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8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 20 Jun 2016 15 Jun 2016 000-17999
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8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 26 Apr 2016 26 Apr 2016 000-17999
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SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 16 Feb 2016 005-40774
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SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 12 Feb 2016 005-40774
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Feb 2016 31 Dec 2015 000-17999
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SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 26 Jan 2016 005-40774
8-K Open 8-K document View SEC filing for 8-K 8-K 26 Jan 2016 22 Jan 2016 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 12 Nov 2015 10 Nov 2015 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 30 Oct 2015 30 Sep 2015 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 27 Oct 2015 27 Oct 2015 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 22 Oct 2015 22 Oct 2015 000-17999
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 02 Oct 2015 30 Jun 2015 000-17999
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DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 30 Sep 2015 000-17999
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CT ORDER Open CT ORDER document View SEC filing for CT ORDER 27 Aug 2015 000-17999
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10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 27 Aug 2015 30 Jun 2015 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 31 Jul 2015 31 Jul 2015 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 May 2015 31 Mar 2015 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 24 Apr 2015 24 Apr 2015 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 30 Mar 2015 24 Mar 2015 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Feb 2015 31 Dec 2014 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 30 Oct 2014 30 Sep 2014 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Feb 2014 31 Dec 2013 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 10 Dec 2013 09 Dec 2013 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 10 Dec 2013 09 Dec 2013 000-17999
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A NONE 09 Dec 2013 005-40774
4 Open 4 document View SEC filing for 4 FORM 4 - 03 Dec 2013 02 Dec 2013
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8-K Open 8-K document View SEC filing for 8-K 8-K 13 Nov 2013 12 Nov 2013 000-17999
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4 Open 4 document View SEC filing for 4 FORM 4 - 13 Nov 2013 12 Nov 2013
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4 Open 4 document View SEC filing for 4 FORM 4 - 13 Nov 2013 12 Nov 2013
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4 Open 4 document View SEC filing for 4 FORM 4 - 13 Nov 2013 12 Nov 2013
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Nov 2013 05 Nov 2013 000-17999
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Nov 2013 01 Nov 2013
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 29 Oct 2013 30 Sep 2013 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Oct 2013 25 Oct 2013 000-17999
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 07 Oct 2013 30 Jun 2013 000-17999
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DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 02 Oct 2013 000-17999
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 02 Oct 2013 12 Nov 2013 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 19 Sep 2013 13 Sep 2013 000-17999
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10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 29 Aug 2013 30 Jun 2013 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Aug 2013 26 Aug 2013 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 02 Aug 2013 02 Aug 2013 000-17999
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CT ORDER Open CT ORDER document View SEC filing for CT ORDER 24 Jun 2013 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 07 Jun 2013 03 Jun 2013 000-17999
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 May 2013 31 Mar 2013 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 26 Apr 2013 26 Apr 2013 000-17999
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8-K Open 8-K document View SEC filing for 8-K 8-K 08 Apr 2013 07 Apr 2013 000-17999
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Apr 2013 29 Mar 2013 000-17999
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About this filer

ImmunoGen, Inc. files with the SEC under CIK 0000855654. This page aggregates EDGAR filings and related ownership activity.

Industry: Pharmaceutical Preparations.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
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Updates follow new EDGAR submissions and periodic data refreshes.

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