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BIIB icon

AlphaQuest’s Biogen BIIB Stock Holding History

AlphaQuest’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
Q1 		– Sell
-2,799
Closed -$493K – 259
2025
Q4 		$493K Buy
2,799
+2,424
+646% +$396K 0.03% 835
2025
Q3 		$52.5K Sell
375
-10,789
-97% -$1.46M ﹤0.01% 1918
2025
Q2 		$1.4M Buy
11,164
+2,837
+34% +$353K 0.14% 188
2025
Q1 		$1.14M Sell
8,327
-12,504
-60% -$1.79M 0.12% 253
2024
Q4 		$3.19M Buy
+20,831
New +$3.51M 0.42% 10

Other funds holding BIIB

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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 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
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

AlphaQuest's BIIB Position: Q1 2026 in Review

AlphaQuest sold out of Biogen (BIIB) in Q1 2026, closing a stake of 2,799 shares — an estimated $493K sold.

AlphaQuest first reported a position in BIIB in Q4 2024 and held it in 5 quarters. The position peaked at $3.19M in Q4 2024. 1,011 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • AlphaQuest reported no remaining Biogen position as of Q1 2026 after selling out during the quarter.
  • AlphaQuest sold 2,799 Biogen shares in Q1 2026, an estimated $493K.
  • AlphaQuest first reported a position in Biogen in Q4 2024 and held it in 5 quarters.
  • AlphaQuest's Biogen position peaked at $3.19M in Q4 2024.
  • 1,011 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on AlphaQuest's 13F filing for Q1 2026.