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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

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

Sphera Funds Management's BIIB Position: Q1 2026 in Review

Sphera Funds Management reduced its Biogen (BIIB) stake by 2.3% in Q1 2026, selling an estimated $408K and leaving 92,526 shares worth $17M. The position accounts for 2.69% of the portfolio, ranked #8.

Sphera Funds Management first reported a position in BIIB in Q4 2013 and has held it in 36 quarters since. The position peaked at $37.9M in Q4 2015. 1,004 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Sphera Funds Management held 92,526 shares of Biogen worth $17M as of Q1 2026.
  • Sphera Funds Management sold 2,212 Biogen shares in Q1 2026, an estimated $408K.
  • Biogen made up 2.69% of Sphera Funds Management's portfolio in Q1 2026, its #8 holding.
  • Sphera Funds Management first reported a position in Biogen in Q4 2013 and has held it in 36 quarters since.
  • Sphera Funds Management's Biogen position peaked at $37.9M in Q4 2015.
  • 1,004 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Sphera Funds Management's 13F filing for Q1 2026, filed 15 May 2026.