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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
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 Sell
1,727
-1,421
-45% -$333K 0.04% 315
2023
Q4 		$815K Buy
3,148
+1,482
+89% +$364K 0.03% 299
2023
Q3 		$428K Buy
+1,666
New +$446K 0.05% 209

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

Syon Capital's BIIB Position: Q1 2026 in Review

Syon Capital reduced its Biogen (BIIB) stake by 0.51% in Q1 2026, selling an estimated $2.95K and leaving 3,130 shares worth $574K. The position accounts for 0.03% of the portfolio, ranked #499.

Syon Capital first reported a position in BIIB in Q3 2023 and has held it in 11 quarters since. The position peaked at $815K in Q4 2023. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Syon Capital held 3,130 shares of Biogen worth $574K as of Q1 2026.
  • Syon Capital sold 16 Biogen shares in Q1 2026, an estimated $2.95K.
  • Biogen made up 0.03% of Syon Capital's portfolio in Q1 2026, its #499 holding.
  • Syon Capital first reported a position in Biogen in Q3 2023 and has held it in 11 quarters since.
  • Syon Capital's Biogen position peaked at $815K in Q4 2023.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Syon Capital's 13F filing for Q1 2026, filed 13 May 2026.