Perceptive Advisors’s Biogen BIIB Stock Holding History

Perceptive Advisors’s Portfolio BIIB Stock Details BIIB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2021 Q2	–	Sell	-748,000	Closed	-$209M	–	153
2021 Q1	$209M	Buy	+748,000	New	+$202M	2.65%	7
2020 Q4	–	Sell	-100,000	Closed	-$28.4M	–	143
2020 Q3	$28.4M	Buy	+100,000	New	+$27.9M	0.41%	56
2019 Q3	–	Sell	-200,000	Closed	-$65K	–	112
2019 Q2	$65K	Sell	200,000 -200,000	-50%	-$46.2M	﹤0.01%	102
2019 Q1	$620K	Buy	+400,000	New	+$126M	0.02%	90
2018 Q2	–	Sell	-50,000	Closed	-$11K	–	131
2018 Q1	$11K	Buy	+50,000	New	+$15.5M	﹤0.01%	136

Other funds holding BIIB

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Perceptive Advisors's BIIB Position: Q2 2026 in Review

Perceptive Advisors opened a new position in Biogen (BIIB) in Q2 2026: 276,173 shares worth $59.7M. The stake represents 0.9% of the portfolio and ranks #28 among its holdings. This is a return to the name: Perceptive Advisors previously reported a position in BIIB as recently as Q4 2025.

Perceptive Advisors first reported a position in BIIB in Q2 2013 and has held it in 11 quarters since. 1,044 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Perceptive Advisors held 276,173 shares of Biogen worth $59.7M as of Q2 2026.
Biogen was a new Perceptive Advisors position in Q2 2026.
Biogen made up 0.9% of Perceptive Advisors's portfolio in Q2 2026, its #28 holding.
Perceptive Advisors first reported a position in Biogen in Q2 2013 and has held it in 11 quarters since.
1,044 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Perceptive Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.