Amylyx Pharmaceuticals, Inc. AMLX

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27.62 USD -1.78 (-6.05%)

At closeNov 5, 2026, 5:45 PM EST

27.53 -0.09 -0.33%

After hours · Nov 5, 5:45 PM ET

27.48 Day range 30.23

11.38 52-week range 39.66

Held by insiders 7.16%

Held by institutions 94.11%

Float held by institutions 101.36%

Institutions 293

Top institutional holders
Holder	% held	Shares	Value	Reported
FMR, LLC	15.01%	16,727,909	462.02M	Jun 29, 2026
Blackrock Inc.	7.92%	8,827,085	243.80M	Jun 29, 2026
Perceptive Advisors Llc	7.48%	8,334,882	230.21M	Jun 29, 2026
TCG Crossover Management, LLC	5.60%	6,243,812	172.45M	Jun 29, 2026
Commodore Capital Lp	5.07%	5,650,000	156.05M	Jun 29, 2026
Jupiter Topco LLC	4.70%	5,236,102	144.62M	Jun 29, 2026

Top mutual fund holders
Holder	% held	Shares	Value	Reported
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	2.83%	3,154,723	87.13M	Jun 29, 2026
iShares Trust-iShares Russell 2000 ETF	2.42%	2,694,093	74.41M	Sep 29, 2026
Fidelity Advisor Series VII-Fidelity Advisor Biotechnology Fund	2.18%	2,433,200	67.20M	Sep 29, 2026
Fidelity Securities Fund-Fidelity Small Cap Growth Fund	1.90%	2,115,961	58.44M	Jul 30, 2026
Fidelity Select Portfolios-Select Biotechnology Portfolio	1.44%	1,601,402	44.23M	Sep 29, 2026
Fidelity Select Portfolios-Select Health Care Portfolio	1.44%	1,600,000	44.19M	Sep 29, 2026

AMLX insiders
Insider	Relation	Latest transaction	Date	Shares held
BEDROSIAN CAMILLE L	Officer	Sale	Sep 9, 2026	278,064
COHEN JOSHUA BARRY	Chief Executive Officer	Sale	Sep 9, 2026	3,613,120
FIRESTONE KAREN M.	Director	Conversion of Exercise of derivative security	Aug 30, 2026	116,900
FRATES JAMES MATTHEW	Chief Financial Officer	Sale	Sep 9, 2026	400,156
KLEE JUSTIN B	Chief Executive Officer	Sale	Sep 9, 2026	3,613,060
MAZZARIELLO GINA	Officer	Sale	Sep 9, 2026	190,838

Held by funds