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

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Perceptive Advisors's BIIB Position: Q1 2026 in Review

Perceptive Advisors sold out of Biogen (BIIB) in Q1 2026, closing a stake of 124,000 shares — an estimated $21.8M sold.

Perceptive Advisors first reported a position in BIIB in Q2 2013 and held it in 10 quarters. The position peaked at $49.8M in Q2 2013. 1,004 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

Perceptive Advisors reported no remaining Biogen position as of Q1 2026 after selling out during the quarter.
Perceptive Advisors sold 124,000 Biogen shares in Q1 2026, an estimated $21.8M.
Perceptive Advisors first reported a position in Biogen in Q2 2013 and held it in 10 quarters.
Perceptive Advisors's Biogen position peaked at $49.8M in Q2 2013.
1,004 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Perceptive Advisors's 13F filing for Q1 2026, filed 15 May 2026.