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Syon Capital’s Biogen BIIB Stock Holding History

Syon 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 		$754K Buy
3,492
+362
+12% +$69.2K 0.03% 458
2026
Q1 		$574K Sell
3,130
-16
-0.5% -$2.95K 0.03% 499
2025
Q4 		$554K Buy
3,146
+376
+14% +$61.4K 0.03% 525
2025
Q3 		$388K Buy
2,770
+518
+23% +$70K 0.02% 577
2025
Q2 		$283K Sell
2,252
-794
-26% -$98.9K 0.02% 570
2025
Q1 		$417K Sell
3,046
-891
-23% -$127K 0.03% 343
2024
Q4 		$602K Buy
3,937
+2,580
+190% +$435K 0.05% 247
2024
Q3 		$263K Sell
1,357
-410
-23% -$85.8K 0.02% 388
2024
Q2 		$410K Buy
1,767
+40
+2% +$8.69K 0.04% 297
2024
Q1 		$372K Buy
1,727
+153
+10% +$35.8K 0.04% 315
2023
Q4 		$407K Sell
1,574
-92
-6% -$22.6K 0.04% 288
2023
Q3 		$428K Buy
+1,666
New +$446K 0.05% 209

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

Syon Capital's BIIB Position: Q2 2026 in Review

Syon Capital increased its Biogen (BIIB) stake by 12% in Q2 2026, buying an estimated $69.2K and bringing the position to 3,492 shares worth $754K. The position accounts for 0.03% of the portfolio, ranked #458.

Syon Capital first reported a position in BIIB in Q3 2023 and has held it in 12 quarters since. 1,045 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Syon Capital held 3,492 shares of Biogen worth $754K as of Q2 2026.
  • Syon Capital bought 362 Biogen shares in Q2 2026, an estimated $69.2K.
  • Biogen made up 0.03% of Syon Capital's portfolio in Q2 2026, its #458 holding.
  • Syon Capital first reported a position in Biogen in Q3 2023 and has held it in 12 quarters since.
  • 1,045 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Syon Capital's 13F filing for Q2 2026, filed 14 Aug 2026.