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Maven Securities’s Biogen BIIB Stock Holding History

Maven Securities’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
-13,069
Closed -$2.3M – 411
2025
Q4 		$2.3M Buy
+13,069
New +$2.14M 0.05% 287
2025
Q3 		– Sell
-2,404
Closed -$302K – 488
2025
Q2 		$302K Buy
+2,404
New +$300K 0.01% 696
2024
Q1 		– Sell
-1,709
Closed -$442K – 429
2023
Q4 		$442K Buy
+1,709
New +$420K 0.01% 694
2022
Q1 		– Sell
-8,350
Closed -$1.82M – 975
2021
Q4 		$2M Buy
+8,350
New +$2.15M 0.06% 195
2021
Q2 		– Sell
-3,495
Closed -$968K – 1063
2021
Q1 		$968K Buy
3,495
+2,597
+289% +$700K 0.04% 432
2020
Q4 		$220K Buy
+898
New +$232K 0.02% 491

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

Maven Securities's BIIB Position: Q1 2026 in Review

Maven Securities sold out of Biogen (BIIB) in Q1 2026, closing a stake of 13,069 shares — an estimated $2.3M sold.

Maven Securities first reported a position in BIIB in Q4 2020 and held it in 6 quarters. The position peaked at $2.3M in Q4 2025. 1,011 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Maven Securities reported no remaining Biogen position as of Q1 2026 after selling out during the quarter.
  • Maven Securities sold 13,069 Biogen shares in Q1 2026, an estimated $2.3M.
  • Maven Securities first reported a position in Biogen in Q4 2020 and held it in 6 quarters.
  • Maven Securities's Biogen position peaked at $2.3M in Q4 2025.
  • 1,011 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Maven Securities's 13F filing for Q1 2026, filed 15 May 2026.