Silverarc Capital Management’s Biogen BIIB Stock Holding History

Silverarc Capital Management’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	-10,000	Closed	-$2.8M	–	100
2021 Q1	$2.8M	Sell	10,000 -20,000	-67%	-$5.39M	1.53%	27
2020 Q4	$7.35M	Buy	+30,000	New	+$7.74M	4.27%	2

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 $3.38T AUM 44.17% 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

Silverarc Capital Management's BIIB Position: Q2 2026 in Review

Silverarc Capital Management reduced its Biogen (BIIB) stake by 5.6% in Q2 2026, selling an estimated $548K and leaving 48,101 shares worth $10.4M. The position accounts for 1.08% of the portfolio, ranked #31.

Silverarc Capital Management first reported a position in BIIB in Q4 2020 and has held it in 18 quarters since. The position peaked at $13.3M in Q4 2025. 1,046 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Silverarc Capital Management held 48,101 shares of Biogen worth $10.4M as of Q2 2026.
Silverarc Capital Management sold 2,866 Biogen shares in Q2 2026, an estimated $548K.
Biogen made up 1.08% of Silverarc Capital Management's portfolio in Q2 2026, its #31 holding.
Silverarc Capital Management first reported a position in Biogen in Q4 2020 and has held it in 18 quarters since.
Silverarc Capital Management's Biogen position peaked at $13.3M in Q4 2025.
1,046 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Silverarc Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.