Question 1

Who is acquiring IGM Biosciences?

Accepted Answer

Concentra Biosciences is acquiring IGM Biosciences (IGMS) for $83M. The deal was announced Jul 1, 2025 and closed Aug 14, 2025.

Question 2

Which hedge funds held IGMS before the acquisition?

Accepted Answer

2 specialist biotech hedge funds held IGMS before the deal: Baker Bros. Advisors, Redmile Group. This data comes from SEC 13F filings.

Fund	Shares	Value	Entry	At Announcement
Baker Bros. Advisors	4.1M	$4.6M	Mar 2025	Yes
Redmile Group	3.0M	$3.3M	Mar 2025	Yes

IGM Biosciences + Concentra Biosciences

Deal Summary