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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
Q2 		$4.54M Buy
+21,000
New +$4.02M 0.02% 615
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

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

Caption Management's BIIB Position: Q2 2026 in Review

Caption Management opened a new position in Biogen (BIIB) in Q2 2026: 21,000 shares worth $4.54M. The stake represents 0.02% of the portfolio and ranks #615 among its holdings. This is a return to the name: Caption Management previously reported a position in BIIB as recently as Q4 2025.

Caption Management first reported a position in BIIB in Q4 2019 and has held it in 16 quarters since. The position peaked at $63.2M in Q3 2021. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Caption Management held 21,000 shares of Biogen worth $4.54M as of Q2 2026.
  • Biogen was a new Caption Management position in Q2 2026.
  • Biogen made up 0.02% of Caption Management's portfolio in Q2 2026, its #615 holding.
  • Caption Management first reported a position in Biogen in Q4 2019 and has held it in 16 quarters since.
  • Caption Management's Biogen position peaked at $63.2M in Q3 2021.
  • 1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Caption Management's 13F filing for Q2 2026, filed 14 Aug 2026.