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Bayforest Capital’s Biogen BIIB Stock Holding History

Bayforest 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
Q2 		$144K Buy
+667
New +$128K 0.13% 288
2026
Q1 		– Sell
-887
Closed -$156K – 905
2025
Q4 		$156K Buy
887
+458
+107% +$74.8K 0.12% 354
2025
Q3 		$60.1K Buy
+429
New +$58K 0.03% 573

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

Bayforest Capital's BIIB Position: Q2 2026 in Review

Bayforest Capital opened a new position in Biogen (BIIB) in Q2 2026: 667 shares worth $144K. The stake represents 0.13% of the portfolio and ranks #288 among its holdings. This is a return to the name: Bayforest Capital previously reported a position in BIIB as recently as Q4 2025.

Bayforest Capital first reported a position in BIIB in Q3 2025 and has held it in 3 quarters since. The position peaked at $156K in Q4 2025. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Bayforest Capital held 667 shares of Biogen worth $144K as of Q2 2026.
  • Biogen was a new Bayforest Capital position in Q2 2026.
  • Biogen made up 0.13% of Bayforest Capital's portfolio in Q2 2026, its #288 holding.
  • Bayforest Capital first reported a position in Biogen in Q3 2025 and has held it in 3 quarters since.
  • Bayforest Capital's Biogen position peaked at $156K in Q4 2025.
  • 1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Bayforest Capital's 13F filing for Q2 2026, filed 5 Aug 2026.