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Siren LLC’s Amylyx Pharmaceuticals AMLX Stock Holding History

Siren LLC’s Portfolio AMLX Stock Details AMLX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$17.1M Buy
+1,230,000
New +$17.3M 0.47% 45

Other funds holding AMLX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
PA
Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return
CC
Commodore Capital New York $1.73B AUM 298.96% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
SVCM
Saturn V Capital Management Austin, Texas $552M AUM 551.78% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
FLAM
First Light Asset Management Edina, Minnesota $1.12B AUM 114.45% 1-Year Est. Return

Siren LLC's AMLX Position: Q1 2026 in Review

Siren LLC opened a new position in Amylyx Pharmaceuticals (AMLX) in Q1 2026: 1,230,000 shares worth $17.1M. The stake represents 0.47% of the portfolio and ranks #45 among its holdings.

171 funds tracked by Wall St. Rank hold AMLX as of Q1 2026.

  • Siren LLC held 1,230,000 shares of Amylyx Pharmaceuticals worth $17.1M as of Q1 2026.
  • Amylyx Pharmaceuticals was a new Siren LLC position in Q1 2026.
  • Amylyx Pharmaceuticals made up 0.47% of Siren LLC's portfolio in Q1 2026, its #45 holding.
  • 171 funds tracked by Wall St. Rank held Amylyx Pharmaceuticals as of Q1 2026.

Based on Siren LLC's 13F filing for Q1 2026, filed 14 May 2026.