SEI Investments’s Amylyx Pharmaceuticals AMLX Stock Holding History

SEI Investments’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 Q3	$863K	Buy	29,641 +9,891	+50%	+$262K	﹤0.01%	2378
2026 Q2	$355K	Sell	19,750 -65,529	-77%	-$1.01M	﹤0.01%	2787
2026 Q1	$1.19M	Buy	85,279 +32,423	+61%	+$456K	﹤0.01%	2273
2025 Q4	$638K	Buy	+52,856	New	+$718K	﹤0.01%	2398
2023 Q2	–	Sell	-69,665	Closed	-$2.04M	–	2671
2023 Q1	$2.04M	Buy	69,665 +55,888	+406%	+$1.94M	﹤0.01%	1609
2022 Q4	$509K	Sell	13,777 -49,897	-78%	-$1.77M	﹤0.01%	1994
2022 Q3	$1.79M	Sell	63,674 -30,180	-32%	-$753K	﹤0.01%	1591
2022 Q2	$1.81M	Buy	+93,854	New	+$1.11M	﹤0.01%	1604

Other funds holding AMLX

Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return

BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM

Franklin Resources San Mateo, California $474B AUM 32.39% 1-Year Est. Return

JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return

Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return

State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Siren LLC Greenwich, Connecticut $4.23B AUM 121.47% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM

SEI Investments's AMLX Position: Q3 2026 in Review

SEI Investments increased its Amylyx Pharmaceuticals (AMLX) stake by 50% in Q3 2026, buying an estimated $262K and bringing the position to 29,641 shares worth $863K. The position accounts for ﹤0.01% of the portfolio, ranked #2378.

SEI Investments first reported a position in AMLX in Q2 2022 and has held it in 8 quarters since. The position peaked at $2.04M in Q1 2023. 147 funds tracked by Wall St. Rank hold AMLX as of Q3 2026.

SEI Investments held 29,641 shares of Amylyx Pharmaceuticals worth $863K as of Q3 2026.
SEI Investments bought 9,891 Amylyx Pharmaceuticals shares in Q3 2026, an estimated $262K.
Amylyx Pharmaceuticals made up ﹤0.01% of SEI Investments's portfolio in Q3 2026, its #2378 holding.
SEI Investments first reported a position in Amylyx Pharmaceuticals in Q2 2022 and has held it in 8 quarters since.
SEI Investments's Amylyx Pharmaceuticals position peaked at $2.04M in Q1 2023.
147 funds tracked by Wall St. Rank held Amylyx Pharmaceuticals as of Q3 2026.

Based on SEI Investments's 13F filing for Q3 2026, filed 10 Nov 2026.