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ABN AMRO Investment Solutions’s Biogen BIIB Stock Holding History

ABN AMRO Investment Solutions’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 		$1.74M Buy
8,037
+2,061
+34% +$394K 0.02% 435
2026
Q1 		$1.1M Buy
5,976
+1,150
+24% +$212K 0.01% 452
2025
Q4 		$849K Buy
+4,826
New +$788K 0.01% 435
2024
Q3 		– Sell
-2,118
Closed -$491K – 491
2024
Q2 		$491K Buy
+2,118
New +$460K 0.01% 400
2024
Q1 		– Sell
-14,586
Closed -$3.77M – 435
2023
Q4 		$3.77M Sell
14,586
-840
-5% -$206K 0.07% 209
2023
Q3 		$3.96M Buy
+15,426
New +$4.13M 0.08% 193
2023
Q2 		– Sell
-1,236
Closed -$344K – 410
2023
Q1 		$344K Buy
+1,236
New +$342K 0.01% 374

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

ABN AMRO Investment Solutions's BIIB Position: Q2 2026 in Review

ABN AMRO Investment Solutions increased its Biogen (BIIB) stake by 34% in Q2 2026, buying an estimated $394K and bringing the position to 8,037 shares worth $1.74M. The position accounts for 0.02% of the portfolio, ranked #435.

ABN AMRO Investment Solutions first reported a position in BIIB in Q1 2023 and has held it in 7 quarters since. The position peaked at $3.96M in Q3 2023. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • ABN AMRO Investment Solutions held 8,037 shares of Biogen worth $1.74M as of Q2 2026.
  • ABN AMRO Investment Solutions bought 2,061 Biogen shares in Q2 2026, an estimated $394K.
  • Biogen made up 0.02% of ABN AMRO Investment Solutions's portfolio in Q2 2026, its #435 holding.
  • ABN AMRO Investment Solutions first reported a position in Biogen in Q1 2023 and has held it in 7 quarters since.
  • ABN AMRO Investment Solutions's Biogen position peaked at $3.96M in Q3 2023.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on ABN AMRO Investment Solutions's 13F filing for Q2 2026, filed 23 Jul 2026.