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Cubist Systematic Strategies’s Biogen BIIB Stock Holding History

Cubist Systematic Strategies’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
2025
Q3 		$1.6M Sell
11,400
-10,100
-47% -$1.37M 0.01% 1703
2025
Q2 		$2.7M Buy
21,500
+4,700
+28% +$586K 0.01% 1393
2025
Q1 		$2.3M Buy
16,800
+4,700
+39% +$672K 0.01% 1341
2024
Q4 		$1.85M Buy
12,100
+10,800
+831% +$1.82M 0.01% 1409
2024
Q3 		$252K Sell
1,300
-5,800
-82% -$1.21M ﹤0.01% 2493
2024
Q2 		$1.65M Sell
7,100
-3,100
-30% -$674K 0.01% 1453
2024
Q1 		$2.2M Buy
10,200
+800
+9% +$187K 0.01% 1577
2023
Q4 		$2.43M Buy
9,400
+4,000
+74% +$982K 0.02% 1374
2023
Q3 		$1.39M Buy
+5,400
New +$1.44M 0.01% 1639

Other funds holding BIIB

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

Cubist Systematic Strategies's BIIB Position: Q3 2025 in Review

Cubist Systematic Strategies reduced its Biogen (BIIB) stake by 98% in Q3 2025, selling an estimated $7.38M and leaving 1,300 shares worth $182K. The position accounts for ﹤0.01% of the portfolio, ranked #2678.

Cubist Systematic Strategies first reported a position in BIIB in Q2 2014 and has held it in 44 quarters since. The position peaked at $29.4M in Q3 2022. 905 funds tracked by Wall St. Rank hold BIIB as of Q3 2025.

  • Cubist Systematic Strategies held 1,300 shares of Biogen worth $182K as of Q3 2025.
  • Cubist Systematic Strategies sold 54,619 Biogen shares in Q3 2025, an estimated $7.38M.
  • Biogen made up ﹤0.01% of Cubist Systematic Strategies's portfolio in Q3 2025, its #2678 holding.
  • Cubist Systematic Strategies first reported a position in Biogen in Q2 2014 and has held it in 44 quarters since.
  • Cubist Systematic Strategies's Biogen position peaked at $29.4M in Q3 2022.
  • 905 funds tracked by Wall St. Rank held Biogen as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.