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GF Fund Management’s Biogen BIIB Stock Holding History

GF Fund 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
2026
Q2 		$1.5M Sell
6,957
-336
-5% -$64.3K 0.02% 167
2026
Q1 		$1.34M Buy
7,293
+413
+6% +$76.1K 0.02% 180
2025
Q4 		$1.21M Sell
6,880
-29,529
-81% -$4.82M 0.02% 191
2025
Q3 		$5.1M Sell
36,409
-44
-0.1% -$5.95K 0.09% 141
2025
Q2 		$4.58M Buy
36,453
+1,018
+3% +$127K 0.09% 148
2025
Q1 		$4.85M Buy
35,435
+1,193
+3% +$171K 0.11% 140
2024
Q4 		$5.24M Buy
+34,242
New +$5.78M 0.11% 139

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 $3.38T AUM 44.17% 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

GF Fund Management's BIIB Position: Q2 2026 in Review

GF Fund Management reduced its Biogen (BIIB) stake by 4.6% in Q2 2026, selling an estimated $64.3K and leaving 6,957 shares worth $1.5M. The position accounts for 0.02% of the portfolio, ranked #167.

GF Fund Management first reported a position in BIIB in Q4 2024 and has held it in 7 quarters since. The position peaked at $5.24M in Q4 2024. 1,046 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • GF Fund Management held 6,957 shares of Biogen worth $1.5M as of Q2 2026.
  • GF Fund Management sold 336 Biogen shares in Q2 2026, an estimated $64.3K.
  • Biogen made up 0.02% of GF Fund Management's portfolio in Q2 2026, its #167 holding.
  • GF Fund Management first reported a position in Biogen in Q4 2024 and has held it in 7 quarters since.
  • GF Fund Management's Biogen position peaked at $5.24M in Q4 2024.
  • 1,046 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on GF Fund Management's 13F filing for Q2 2026, filed 7 Aug 2026.