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Caption Management’s Biogen BIIB Stock Holding History

Caption 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
2026
Q1 		– Sell
-53,000
Closed -$9.77M – 1576
2025
Q4 		$9.33M Buy
53,000
+48,000
+960% +$7.84M 0.06% 349
2025
Q3 		$700K Sell
5,000
-6,000
-55% -$811K 0.01% 1217
2025
Q2 		$1.38M Buy
+11,000
New +$1.37M 0.02% 843
2025
Q1 		– Sell
-13,875
Closed -$2.12M – 1533
2024
Q4 		$2.12M Buy
13,875
+12,095
+679% +$2.04M 0.02% 669
2024
Q3 		$345K Sell
1,780
-2,000
-53% -$418K 0.01% 991
2024
Q2 		$876K Buy
+3,780
New +$821K 0.01% 702
2023
Q1 		– Sell
-12,000
Closed -$3.32M – 1109
2022
Q4 		$3.32M Buy
+12,000
New +$3.39M 0.05% 421
2022
Q3 		– Sell
-75,346
Closed -$16M – 1499
2022
Q2 		$15.4M Buy
75,346
+3,646
+5% +$745K 0.21% 105
2022
Q1 		$15.1M Sell
71,700
-163,300
-69% -$35.5M 0.18% 127
2021
Q4 		$56.4M Buy
235,000
+11,700
+5% +$3.01M 0.63% 17
2021
Q3 		$63.2M Buy
223,300
+53,996
+32% +$17.7M 0.72% 9
2021
Q2 		$58.6M Buy
169,304
+93,830
+124% +$28.4M 0.77% 17
2021
Q1 		$21.1M Buy
+75,474
New +$20.4M 0.45% 35
2020
Q4 		– Sell
-12,800
Closed -$3.3M – 975
2020
Q3 		$3.63M Buy
+12,800
New +$3.57M 0.08% 278
2020
Q1 		– Sell
-5,540
Closed -$1.64M – 863
2019
Q4 		$1.64M Buy
+5,540
New +$1.54M 0.06% 392

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

Caption Management's BIIB Position: Q1 2026 in Review

Caption Management sold out of Biogen (BIIB) in Q1 2026, closing a stake of 53,000 shares — an estimated $9.77M sold.

Caption Management first reported a position in BIIB in Q4 2019 and held it in 15 quarters. The position peaked at $63.2M in Q3 2021. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Caption Management reported no remaining Biogen position as of Q1 2026 after selling out during the quarter.
  • Caption Management sold 53,000 Biogen shares in Q1 2026, an estimated $9.77M.
  • Caption Management first reported a position in Biogen in Q4 2019 and held it in 15 quarters.
  • Caption Management's Biogen position peaked at $63.2M in Q3 2021.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Caption Management's 13F filing for Q1 2026, filed 15 May 2026.