ImmunoGen, Inc.

ALLIANCEBERNSTEIN L.P.

Report date

12/31/2023

Quarter

2023 Q4

Filed

2/14/2024

Shares

1,507,809

Value ($000)

44,707

Weight

0.0%

2013 Q4 - 2023 Q4 (19 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2023 Q4	2/14/2024	44,707	0.0%	1,507,809	12/31/2023
2023 Q3	11/14/2023	4,769	0.0%	300,514	9/30/2023
2023 Q2	8/15/2023	5,671	0.0%	300,514	6/30/2023
2023 Q1	5/15/2023	1,108	0.0%	288,664	3/31/2023
2022 Q4	2/15/2023	1,432	0.0%	288,664	12/31/2022
2022 Q3	11/15/2022	1,549	0.0%	324,073	9/30/2022
2022 Q2	8/15/2022	2,161	0.0%	480,321	6/30/2022
2022 Q1	5/13/2022	1,374	0.0%	288,664	3/31/2022
2021 Q4	2/14/2022	2,136	0.0%	287,864	12/31/2021
2021 Q3	11/10/2021	2,350	0.0%	414,471	9/30/2021
2021 Q2	7/30/2021	1,897	0.0%	287,864	6/30/2021
2021 Q1	5/6/2021	2,332	0.0%	287,864	3/31/2021
2020 Q4	2/8/2021	1,857	0.0%	287,864	12/31/2020
2020 Q3	11/12/2020	1,036	0.0%	287,864	9/30/2020
2020 Q2	8/13/2020	1,369	0.0%	297,564	6/30/2020
2020 Q1	5/14/2020	992	0.0%	290,964	3/31/2020
2019 Q4	2/18/2020	1,485	0.0%	290,964	12/31/2019
2014 Q1	5/13/2014	2,500	0.0%	167,451	3/31/2014
2013 Q4	2/13/2014	2,457	0.0%	167,484	12/31/2013