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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
2026
Q2 		$10.4M Sell
48,101
-2,866
-6% -$548K 1.08% 31
2026
Q1 		$9.34M Sell
50,967
-24,445
-32% -$4.5M 0.95% 28
2025
Q4 		$13.3M Sell
75,412
-5,007
-6% -$818K 1.84% 18
2025
Q3 		$11.3M Buy
+80,419
New +$10.9M 1.52% 22
2024
Q4 		– Sell
-19,940
Closed -$3.87M – 68
2024
Q3 		$3.87M Buy
19,940
+575
+3% +$120K 0.87% 36
2024
Q2 		$4.49M Hold
19,365
– – 1.06% 32
2024
Q1 		$4.18M Sell
19,365
-635
-3% -$149K 1.16% 29
2023
Q4 		$5.18M Sell
20,000
-8,069
-29% -$1.98M 1.54% 27
2023
Q3 		$7.21M Buy
28,069
+1,215
+5% +$325K 2.19% 12
2023
Q2 		$7.65M Buy
26,854
+15,543
+137% +$4.63M 2.37% 11
2023
Q1 		$3.14M Sell
11,311
-10,664
-49% -$2.95M 1.3% 29
2022
Q4 		$6.09M Buy
+21,975
New +$6.21M 1.74% 20
2022
Q3 		– Sell
-20,825
Closed -$4.25M – 83
2022
Q2 		$4.25M Buy
20,825
+10,577
+103% +$2.16M 1.31% 24
2022
Q1 		$230K Buy
10,248
+4,504
+78% +$979K 0.1% 62
2021
Q4 		$1.38M Buy
5,744
+1,355
+31% +$348K 0.56% 48
2021
Q3 		$1.24M Buy
+4,389
New +$1.44M 0.7% 48
2021
Q2 		– Sell
-5,000
Closed -$1.4M – 101
2021
Q1 		$1.4M Buy
5,000
+2,000
+67% +$539K 0.76% 48
2020
Q4 		$735K Buy
+3,000
New +$774K 0.43% 59

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Morgan Stanley
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. 1,043 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.
  • 1,043 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.