ImmunoGen, Inc.

Swiss National Bank

Report date

12/31/2023

Quarter

2023 Q4

Filed

2/6/2024

Shares

480,800

Value ($000)

14,256

Weight

0.0%

2013 Q4 - 2023 Q4 (20 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	2/6/2024	14,256	0.0%	480,800	12/31/2023
2023 Q3	11/8/2023	7,630	0.0%	480,800	9/30/2023
2023 Q2	8/9/2023	8,984	0.0%	476,100	6/30/2023
2023 Q1	5/10/2023	1,647	0.0%	428,800	3/31/2023
2022 Q4	2/8/2023	2,379	0.0%	479,600	12/31/2022
2022 Q3	11/9/2022	2,250	0.0%	470,700	9/30/2022
2022 Q2	8/9/2022	2,104	0.0%	467,500	6/30/2022
2022 Q1	5/9/2022	2,281	0.0%	479,100	3/31/2022
2021 Q4	2/8/2022	3,304	0.0%	445,300	12/31/2021
2021 Q3	11/8/2021	2,505	0.0%	441,800	9/30/2021
2021 Q2	8/6/2021	2,823	0.0%	428,400	6/30/2021
2021 Q1	5/7/2021	3,470	0.0%	428,400	3/31/2021
2020 Q4	2/5/2021	2,550	0.0%	395,300	12/31/2020
2020 Q3	11/9/2020	1,423	0.0%	395,300	9/30/2020
2020 Q2	8/5/2020	1,778	0.0%	386,600	6/30/2020
2020 Q1	5/8/2020	1,131	0.0%	331,700	3/31/2020
2019 Q4	2/6/2020	1,465	0.0%	286,900	12/31/2019
2014 Q2	8/6/2014	1,135	0.0%	95,800	6/30/2014
2014 Q1	5/6/2014	1,430	0.0%	95,800	3/31/2014
2013 Q4	1/31/2014	1,081	0.0%	73,700	12/31/2013