ImmunoGen, Inc.

FIRST MANHATTAN CO. LLC.

Report date

12/31/2023

Quarter

2023 Q4

Filed

2/13/2024

Shares

7,500

Value ($000)

222

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	2/13/2024	222	0.0%	7,500	12/31/2023
2023 Q3	11/14/2023	4,498	0.0%	283,400	9/30/2023
2023 Q2	8/14/2023	32,221	0.1%	1,707,500	6/30/2023
2023 Q1	5/15/2023	29	0.0%	7,500	3/31/2023
2022 Q4	2/14/2023	37	0.0%	7,500	12/31/2022
2022 Q3	11/14/2022	35	0.0%	7,500	9/30/2022
2022 Q2	8/15/2022	33	0.0%	7,500	6/30/2022
2022 Q1	5/16/2022	35	0.0%	7,500	3/31/2022
2021 Q4	2/14/2022	7,118	0.0%	959,432	12/31/2021
2021 Q3	11/15/2021	42	0.0%	7,546	9/30/2021
2021 Q2	8/16/2021	49	0.0%	7,546	6/30/2021
2021 Q1	5/14/2021	61	0.0%	7,546	3/31/2021
2020 Q4	2/16/2021	48	0.0%	7,546	12/31/2020
2020 Q3	11/12/2020	27	0.0%	7,590	9/30/2020
2020 Q2	8/14/2020	34	0.0%	7,546	6/30/2020
2020 Q1	5/6/2020	25	0.0%	7,546	3/31/2020
2019 Q4	2/13/2020	38	0.0%	7,546	12/31/2019
2014 Q1	5/16/2014	52	0.0%	3,546	3/31/2014
2013 Q4	2/4/2014	52	0.0%	3,546	12/31/2013