SS
BIIB icon

Steve Schonfeld’s Biogen BIIB Stock Holding History

Steve Schonfeld’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
2022
Q3 		– Sell
-62,000
Closed -$12.6M – 2948
2022
Q2 		$12.6M Hold
62,000
– – 0.12% 223
2022
Q1 		$13.1M Buy
+62,000
New +$13.5M 0.12% 209
2021
Q1 		– Sell
-30,000
Closed -$7.35M – 1801
2020
Q4 		$7.35M Buy
30,000
+10,000
+50% +$2.58M 0.1% 294
2020
Q3 		$5.67M Buy
+20,000
New +$5.58M 0.11% 257

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

Steve Schonfeld's BIIB Position: Q2 2026 in Review

Steve Schonfeld sold out of Biogen (BIIB) in Q2 2026, closing a stake of 48,828 shares — an estimated $8.95M sold.

Steve Schonfeld first reported a position in BIIB in Q1 2016 and held it in 36 quarters. The position peaked at $44.8M in Q3 2025. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Steve Schonfeld reported no remaining Biogen position as of Q2 2026 after selling out during the quarter.
  • Steve Schonfeld sold 48,828 Biogen shares in Q2 2026, an estimated $8.95M.
  • Steve Schonfeld first reported a position in Biogen in Q1 2016 and held it in 36 quarters.
  • Steve Schonfeld's Biogen position peaked at $44.8M in Q3 2025.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Schonfeld Strategic Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.