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Sphera Funds Management’s Biogen BIIB Stock Holding History

Sphera Funds Management’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
2019
Q2 		– Sell
-60,000
Closed -$14.2M – 92
2019
Q1 		$14.2M Buy
+60,000
New +$18.9M 1.29% 15
2016
Q3 		– Sell
-250
Closed -$6.05M – 111
2016
Q2 		$6.05M Buy
+250
New +$65.9K 1.57% 13

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

Sphera Funds Management's BIIB Position: Q2 2026 in Review

Sphera Funds Management increased its Biogen (BIIB) stake by 4.4% in Q2 2026, buying an estimated $784K and bringing the position to 96,626 shares worth $20.9M. The position accounts for 2.72% of the portfolio, ranked #7.

Sphera Funds Management first reported a position in BIIB in Q4 2013 and has held it in 37 quarters since. The position peaked at $37.9M in Q4 2015. 1,045 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Sphera Funds Management held 96,626 shares of Biogen worth $20.9M as of Q2 2026.
  • Sphera Funds Management bought 4,100 Biogen shares in Q2 2026, an estimated $784K.
  • Biogen made up 2.72% of Sphera Funds Management's portfolio in Q2 2026, its #7 holding.
  • Sphera Funds Management first reported a position in Biogen in Q4 2013 and has held it in 37 quarters since.
  • Sphera Funds Management's Biogen position peaked at $37.9M in Q4 2015.
  • 1,045 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Sphera Funds Management's 13F filing for Q2 2026, filed 14 Aug 2026.