ImmunoGen, Inc.

PRINCIPAL FINANCIAL GROUP INC

Report date

12/31/2023

Quarter

2023 Q4

Filed

2/7/2024

Shares

1,127,402

Value ($000)

33,427

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	2/7/2024	33,427	0.0%	1,127,402	12/31/2023
2023 Q3	11/2/2023	15,627	0.0%	984,664	9/30/2023
2023 Q2	8/7/2023	18,641	0.0%	987,886	6/30/2023
2023 Q1	5/9/2023	215	0.0%	55,996	3/31/2023
2022 Q4	2/9/2023	267	0.0%	53,783	12/31/2022
2022 Q3	11/9/2022	249	0.0%	52,167	9/30/2022
2022 Q2	8/10/2022	211	0.0%	46,883	6/30/2022
2022 Q1	5/9/2022	781	0.0%	164,004	3/31/2022
2021 Q4	2/9/2022	1,627	0.0%	219,341	12/31/2021
2021 Q3	11/9/2021	1,411	0.0%	248,959	9/30/2021
2021 Q2	8/10/2021	1,670	0.0%	253,289	6/30/2021
2021 Q1	5/10/2021	2,102	0.0%	259,564	3/31/2021
2020 Q4	2/23/2021	1,553	0.0%	240,719	12/31/2020
2020 Q3	11/6/2020	1,013	0.0%	281,497	9/30/2020
2020 Q2	8/5/2020	830	0.0%	180,299	6/30/2020
2020 Q1	5/12/2020	141	0.0%	41,508	3/31/2020
2019 Q4	2/5/2020	193	0.0%	37,790	12/31/2019
2014 Q1	5/13/2014	305	0.0%	20,457	3/31/2014
2013 Q4	2/12/2014	426	0.0%	29,071	12/31/2013