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 		$6.48M Buy
35,339
+33,764
+2,144% +$6.22M 0.03% 635
2025
Q4 		$277K Sell
1,575
-62
-4% -$10.1K ﹤0.01% 3365
2025
Q3 		$229K Sell
1,637
-2,318
-59% -$313K ﹤0.01% 3229
2025
Q2 		$497K Sell
3,955
-65,950
-94% -$8.22M ﹤0.01% 2641
2025
Q1 		$9.57M Buy
69,905
+59,865
+596% +$8.56M 0.04% 462
2024
Q4 		$1.54M Buy
10,040
+5,387
+116% +$909K ﹤0.01% 2022
2024
Q3 		$902K Sell
4,653
-42,642
-90% -$8.92M ﹤0.01% 2759
2024
Q2 		$11M Buy
47,295
+37,711
+393% +$8.2M 0.02% 695
2024
Q1 		$2.07M Buy
+9,584
New +$2.24M ﹤0.01% 1974
2023
Q4 		– Sell
-1,438
Closed -$353K – 4947
2023
Q3 		$370K Sell
1,438
-13,250
-90% -$3.54M ﹤0.01% 3054
2023
Q2 		$4.18M Buy
14,688
+994
+7% +$296K 0.02% 845
2023
Q1 		$3.81M Sell
13,694
-20,803
-60% -$5.76M 0.06% 414
2022
Q4 		$9.55M Buy
+34,497
New +$9.74M 0.17% 128
2022
Q2 		– Sell
-1,685
Closed -$355K – 2367
2022
Q1 		$355K Buy
+1,685
New +$366K 0.01% 1204
2020
Q2 		– Sell
-180
Closed -$57K – 626
2020
Q1 		$57K Sell
180
-30
-14% -$9.1K 0.01% 674
2019
Q4 		$62K Sell
210
-3,342
-94% -$927K ﹤0.01% 1476
2019
Q3 		$827K Buy
3,552
+3,392
+2,120% +$790K 0.05% 522
2019
Q2 		$37K Buy
+160
New +$36.9K ﹤0.01% 1435
2018
Q3 		$562K Buy
+1,591
New +$548K 0.26% 113

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.