Historical shareholding details of SEI Investments Co holdings in Immunogen, Inc. (IMGN)

Monthly changes of SEI Investments Co shareholding in Immunogen, Inc. over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Sep 30, 2023	Sei Investments Co	193,702	0.07%

Jun 30, 2023	Sei Investments Co	192,439	0.08%

Mar 31, 2023	Sei Investments Co	45,121	0.02%