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SummitTX Capital’s Biogen BIIB Stock Holding History

SummitTX Capital’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
Q1 		$3.97M Buy
+21,656
New +$3.99M 0.12% 195
2025
Q4 		– Sell
-17,379
Closed -$2.43M – 709
2025
Q3 		$2.43M Sell
17,379
-37,591
-68% -$5.08M 0.1% 217
2025
Q2 		$6.9M Buy
54,970
+43,288
+371% +$5.39M 0.3% 77
2025
Q1 		$1.6M Buy
+11,682
New +$1.67M 0.07% 292

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

SummitTX Capital's BIIB Position: Q1 2026 in Review

SummitTX Capital opened a new position in Biogen (BIIB) in Q1 2026: 21,656 shares worth $3.97M. The stake represents 0.12% of the portfolio and ranks #195 among its holdings. This is a return to the name: SummitTX Capital previously reported a position in BIIB as recently as Q3 2025.

SummitTX Capital first reported a position in BIIB in Q1 2025 and has held it in 4 quarters since. The position peaked at $6.9M in Q2 2025. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • SummitTX Capital held 21,656 shares of Biogen worth $3.97M as of Q1 2026.
  • Biogen was a new SummitTX Capital position in Q1 2026.
  • Biogen made up 0.12% of SummitTX Capital's portfolio in Q1 2026, its #195 holding.
  • SummitTX Capital first reported a position in Biogen in Q1 2025 and has held it in 4 quarters since.
  • SummitTX Capital's Biogen position peaked at $6.9M in Q2 2025.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on SummitTX Capital's 13F filing for Q1 2026, filed 15 May 2026.