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Fortitude Family Office’s Biogen BIIB Stock Holding History

Fortitude Family Office’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 		$68.1K Buy
315
+246
+357% +$47.1K 0.01% 232
2026
Q1 		$12.7K Buy
69
+37
+116% +$6.82K ﹤0.01% 570
2025
Q4 		$5.63K Buy
32
+12
+60% +$1.96K ﹤0.01% 766
2025
Q3 		$2.8K Hold
20
– – ﹤0.01% 1059
2025
Q2 		$2.51K Buy
+20
New +$2.49K ﹤0.01% 1080
2024
Q4 		– Sell
-12
Closed -$2.33K – 1298
2024
Q3 		$2.33K Hold
12
– – ﹤0.01% 972
2024
Q2 		$2.78K Buy
+12
New +$2.61K ﹤0.01% 746
2024
Q1 		– Sell
-7
Closed -$1.81K – 977
2023
Q4 		$1.81K Buy
+7
New +$1.72K ﹤0.01% 883

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

Fortitude Family Office's BIIB Position: Q2 2026 in Review

Fortitude Family Office increased its Biogen (BIIB) stake by 357% in Q2 2026, buying an estimated $47.1K and bringing the position to 315 shares worth $68.1K. The position accounts for 0.01% of the portfolio, ranked #232.

Fortitude Family Office first reported a position in BIIB in Q4 2023 and has held it in 8 quarters since. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Fortitude Family Office held 315 shares of Biogen worth $68.1K as of Q2 2026.
  • Fortitude Family Office bought 246 Biogen shares in Q2 2026, an estimated $47.1K.
  • Biogen made up 0.01% of Fortitude Family Office's portfolio in Q2 2026, its #232 holding.
  • Fortitude Family Office first reported a position in Biogen in Q4 2023 and has held it in 8 quarters since.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Fortitude Family Office's 13F filing for Q2 2026, filed 20 Jul 2026.