Ken Griffin
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Ken Griffin’s Amylyx Pharmaceuticals AMLX Stock Holding History

Ken Griffin’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 		$630K Sell
45,300
-66,600
-60% -$937K ﹤0.01% 8736
2025
Q4 		$1.35M Buy
111,900
+13,800
+14% +$187K ﹤0.01% 6750
2025
Q3 		$1.33M Buy
98,100
+53,500
+120% +$504K ﹤0.01% 6916
2025
Q2 		$286K Buy
44,600
+16,800
+60% +$81.7K ﹤0.01% 9919
2025
Q1 		$98.4K Sell
27,800
-107,200
-79% -$381K ﹤0.01% 11493
2024
Q4 		$510K Buy
135,000
+45,700
+51% +$215K ﹤0.01% 8507
2024
Q3 		$289K Buy
89,300
+20,300
+29% +$45.6K ﹤0.01% 9408
2024
Q2 		$131K Sell
69,000
-384,800
-85% -$746K ﹤0.01% 10539
2024
Q1 		$1.29M Buy
453,800
+226,600
+100% +$2.96M ﹤0.01% 6410
2023
Q4 		$3.34M Buy
227,200
+112,900
+99% +$1.73M ﹤0.01% 4470
2023
Q3 		$2.09M Buy
114,300
+60,200
+111% +$1.27M ﹤0.01% 5126
2023
Q2 		$1.17M Sell
54,100
-44,900
-45% -$1.21M ﹤0.01% 6141
2023
Q1 		$2.9M Buy
99,000
+47,300
+91% +$1.64M ﹤0.01% 4689
2022
Q4 		$1.91M Sell
51,700
-360,000
-87% -$12.8M ﹤0.01% 5571
2022
Q3 		$11.6M Buy
411,700
+161,400
+64% +$4.03M ﹤0.01% 2557
2022
Q2 		$4.82M Buy
+250,300
New +$2.97M ﹤0.01% 3863

Other funds holding AMLX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 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

Ken Griffin's AMLX Position: Q1 2026 in Review

Ken Griffin increased its Amylyx Pharmaceuticals (AMLX) stake by 19% in Q1 2026, buying an estimated $936K and bringing the position to 411,532 shares worth $5.72M. The position accounts for ﹤0.01% of the portfolio, ranked #4124.

Ken Griffin first reported a position in AMLX in Q1 2022 and has held it in 17 quarters since. The position peaked at $33M in Q4 2023. 171 funds tracked by Wall St. Rank hold AMLX as of Q1 2026.

  • Ken Griffin held 411,532 shares of Amylyx Pharmaceuticals worth $5.72M as of Q1 2026.
  • Ken Griffin bought 66,564 Amylyx Pharmaceuticals shares in Q1 2026, an estimated $936K.
  • Amylyx Pharmaceuticals made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #4124 holding.
  • Ken Griffin first reported a position in Amylyx Pharmaceuticals in Q1 2022 and has held it in 17 quarters since.
  • Ken Griffin's Amylyx Pharmaceuticals position peaked at $33M in Q4 2023.
  • 171 funds tracked by Wall St. Rank held Amylyx Pharmaceuticals as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.