How many acquisitions has Biogen made so far?

Biogen has completed 13 acquisitions so far, with an average acquisition amount of $2.33B.

Which countries does Biogen usually acquire in?

Biogen has made acquisitions in 4 countries with the most activity in United States and United Kingdom.

Which is Biogen's latest acquisition?

Biogen's most recent acquisition is RayThera, a Developer of small molecule therapies for unmet needs in immunology, acquired in June 2026.

Which sectors does Biogen target for acquisitions?

Most of Biogen's acquisitions are in Immunology (5) and Rare Diseases (3).

List of 13 Acquisitions by Biogen (Sep 2026)

Most viewed in 2019

Biogen has made a total of 13 acquisitions. These span 11 sectors, including Immunology, Rare Diseases, and Neurology, across 4 countries: United States, United Kingdom, China, and one additional country. Peak activity occurred in 2026 and 2006 with 2 acquisitions each, and in 2025 with 1 acquisition. The average number of acquisitions per year from 2020 to 2025 is 0.6, and 2 acquisitions have been completed in the current calendar year. In June 2026, it acquired RayThera, a San Diego-based firm founded in 2023 that develops small molecule therapies for unmet needs in immunology.

Here's the year on year acquisition history of Biogen:

Number of Total Acquisitions

Year	# Acquisitions
2026	2
2025	1
2024	1
2023	1
2019	1
2015	1
2014	1
2013	1
2007	1
2006	2
2003	1

View all Acquisitions by Biogen

Recent acquisitions by Biogen

Biogen's most recent acquisition - RayThera is a Developer of small molecule therapies for unmet needs in immunology, founded in 2023 and located in San Diego. Biogen acquired it in June 2026 for a price of $*****.

Here is the list of all acquisitions by Biogen sorted by the latest acquisition date:

Acquired on	Acquired Company	Acquisition Price	Facilitators	Stake Acquired	Acquisition Multiple
Jun 17, 2026	RayThera	zhew	vgdd	34	383
Mar 31, 2026	Apellis Pharmaceuticals	x{vf	btti	40	138
Sep 18, 2025	Alcyone	ooaz	rdfx	74	562
May 22, 2024	HIBio	cj{x	dsbw	93	757
Jul 28, 2023	Reata Pharma	eaml	veea	62	116