ImmunoGen, Inc.

STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM

Report date

12/31/2023

Quarter

2023 Q4

Filed

2/9/2024

Shares

69,187

Value ($000)

2,051

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	2/9/2024	2,051	0.0%	69,187	12/31/2023
2023 Q3	11/8/2023	1,098	0.0%	69,187	9/30/2023
2023 Q2	8/11/2023	1,300	0.0%	68,897	6/30/2023
2023 Q1	6/14/2023	270	0.0%	70,387	3/31/2023
2022 Q4	6/14/2023	349	0.0%	70,387	12/31/2022
2022 Q3	11/8/2022	370	0.0%	77,487	9/30/2022
2022 Q2	8/5/2022	349	0.0%	77,487	6/30/2022
2022 Q1	5/6/2022	369	0.0%	77,487	3/31/2022
2021 Q4	2/8/2022	575	0.0%	77,487	12/31/2021
2021 Q3	11/8/2021	438	0.0%	77,317	9/30/2021
2021 Q2	8/10/2021	510	0.0%	77,317	6/30/2021
2021 Q1	5/10/2021	626	0.0%	77,227	3/31/2021
2020 Q4	2/8/2021	498	0.0%	77,227	12/31/2020
2020 Q3	11/9/2020	278	0.0%	77,227	9/30/2020
2020 Q2	8/7/2020	355	0.0%	77,227	6/30/2020
2020 Q1	5/5/2020	263	0.0%	77,227	3/31/2020
2019 Q4	2/3/2020	396	0.0%	77,487	12/31/2019
2014 Q2	8/7/2014	1,061	0.0%	89,515	6/30/2014
2014 Q1	4/24/2014	1,289	0.0%	86,311	3/31/2014
2013 Q4	2/5/2014	1,266	0.0%	86,311	12/31/2013