Walleye Capital
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Walleye Capital’s Biogen BIIB Stock Holding History

Walleye Capital’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 		$3.43M Sell
18,700
-31,300
-63% -$5.77M 0.01% 1050
2025
Q4 		$8.8M Buy
50,000
+24,600
+97% +$4.02M 0.03% 746
2025
Q3 		$3.56M Buy
25,400
+3,100
+14% +$419K 0.01% 1152
2025
Q2 		$2.8M Sell
22,300
-24,700
-53% -$3.08M 0.01% 1259
2025
Q1 		$6.43M Buy
47,000
+32,100
+215% +$4.59M 0.03% 648
2024
Q4 		$2.28M Buy
14,900
+500
+3% +$84.3K 0.01% 1666
2024
Q3 		$2.79M Sell
14,400
-34,000
-70% -$7.11M 0.01% 1649
2024
Q2 		$11.2M Sell
48,400
-2,800
-5% -$609K 0.02% 677
2024
Q1 		$11M Buy
51,200
+5,200
+11% +$1.22M 0.02% 772
2023
Q4 		$11.9M Buy
46,000
+10,000
+28% +$2.46M 0.03% 589
2023
Q3 		$9.25M Sell
36,000
-1,900
-5% -$508K 0.02% 616
2023
Q2 		$10.8M Buy
37,900
+36,500
+2,607% +$10.9M 0.04% 369
2023
Q1 		$389K Sell
1,400
-400
-22% -$111K 0.01% 1909
2022
Q4 		$498K Buy
+1,800
New +$508K 0.01% 1456
2020
Q1 		– Sell
-18,100
Closed -$5.37M – 957
2019
Q4 		$5.37M Sell
18,100
-9,100
-33% -$2.52M 0.35% 39
2019
Q3 		$6.33M Buy
27,200
+19,500
+253% +$4.54M 0.38% 36
2019
Q2 		$1.8M Buy
+7,700
New +$1.78M 0.2% 114

Other funds holding BIIB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
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
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Walleye Capital's BIIB Position: Q1 2026 in Review

Walleye Capital increased its Biogen (BIIB) stake by 2,144% in Q1 2026, buying an estimated $6.22M and bringing the position to 35,339 shares worth $6.48M. The position accounts for 0.03% of the portfolio, ranked #635.

Walleye Capital first reported a position in BIIB in Q3 2018 and has held it in 19 quarters since. The position peaked at $11M in Q2 2024. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Walleye Capital held 35,339 shares of Biogen worth $6.48M as of Q1 2026.
  • Walleye Capital bought 33,764 Biogen shares in Q1 2026, an estimated $6.22M.
  • Biogen made up 0.03% of Walleye Capital's portfolio in Q1 2026, its #635 holding.
  • Walleye Capital first reported a position in Biogen in Q3 2018 and has held it in 19 quarters since.
  • Walleye Capital's Biogen position peaked at $11M in Q2 2024.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Walleye Capital's 13F filing for Q1 2026, filed 11 May 2026.