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STF Management’s Biogen BIIB Stock Holding History

STF 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
2025
Q4 		$141K Sell
804
-721
-47% -$118K 0.13% 95
2025
Q3 		$214K Buy
1,525
+7
+0.5% +$946 0.08% 99
2025
Q2 		$191K Buy
1,518
+76
+5% +$9.47K 0.08% 101
2025
Q1 		$197K Buy
1,442
+108
+8% +$15.4K 0.09% 97
2024
Q4 		$204K Sell
1,334
-758
-36% -$128K 0.09% 99
2024
Q3 		$406K Sell
2,092
-215
-9% -$45K 0.18% 88
2024
Q2 		$535K Sell
2,307
-95
-4% -$20.6K 0.23% 85
2024
Q1 		$518K Sell
2,402
-58
-2% -$13.6K 0.22% 89
2023
Q4 		$637K Buy
2,460
+91
+4% +$22.4K 0.3% 74
2023
Q3 		$609K Buy
2,369
+1,468
+163% +$393K 0.32% 72
2023
Q2 		$257K Sell
901
-752
-45% -$224K 0.28% 70
2023
Q1 		$460K Buy
1,653
+693
+72% +$192K 0.31% 68
2022
Q4 		$266K Buy
+960
New +$271K 0.38% 62

Other funds holding BIIB

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
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
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
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
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $935B AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

STF Management's BIIB Position: Q4 2025 in Review

STF Management reduced its Biogen (BIIB) stake by 47% in Q4 2025, selling an estimated $118K and leaving 804 shares worth $141K. The position accounts for 0.13% of the portfolio, ranked #95.

STF Management first reported a position in BIIB in Q4 2022 and has held it in 13 quarters since. The position peaked at $637K in Q4 2023. 997 funds tracked by Wall St. Rank hold BIIB as of Q4 2025.

  • STF Management held 804 shares of Biogen worth $141K as of Q4 2025.
  • STF Management sold 721 Biogen shares in Q4 2025, an estimated $118K.
  • Biogen made up 0.13% of STF Management's portfolio in Q4 2025, its #95 holding.
  • STF Management first reported a position in Biogen in Q4 2022 and has held it in 13 quarters since.
  • STF Management's Biogen position peaked at $637K in Q4 2023.
  • 997 funds tracked by Wall St. Rank held Biogen as of Q4 2025.

Based on STF Management's 13F filing for Q4 2025, filed 5 Feb 2026.