$AMLX

$27.09 -$0.11 (0.4%) Close

$AMLX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 111.4M shares outstanding

Who owns AMLX?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 60.2%

FMR LLC 15.0% · BlackRock, Inc. 7.9%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

204

+33 vs last qtr

Net shares bought

+816.2K

by institutions in Q2 2026

New / sold out

50 / 17

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jupiter Topco LLC NEW +5.2M
Jpmorgan Chase & Co +1.7M

Biggest sellers in Q2 2026

Janus Henderson Group PLC SOLD OUT −5.0M
Adage Capital Partners GP, L.L.C. −1.7M

Who is planning to sell?

Notices of proposed sale, last 12 months

$12.2M

25 notices from 9 people

Shares covered

644.2K

0.58% of the company

Arranged in advance

27%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

George Milne Director 10b5-1 $2.78M
Justin Klee Director $1.94M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

+1335.8%

+94.66% a year

Each share's claim on the business

−93.0%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $123M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years43% 1–3 years31% Under 1 year26%

Quarterly turnover

14.1%

of institutional shares changed hands

Top 10 managers, median time held

1.8 years

Super Investors

Investment managers reporting AMLX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
F FMR LLC	16.7M	15.01%	+97.4K (+0.6%)	2022	0.0%
Shares held by quarter Peak holding16.7M (Q2'26) Change over 8 quarters+16.5M Share of the company15.010% FMR LLC's full portfolio →
B BlackRock, Inc.	8.8M	7.92%	−1.8K (−0.0%)	2022	0.0%
Shares held by quarter Peak holding9.1M (Q4'25) Change over 8 quarters+6.3M Share of the company7.920% BlackRock, Inc.'s full portfolio →

FMR LLC

16.7M

% of company

15.01%

Change vs last qtr

+97.4K (+0.6%)

Held since

2022

BlackRock, Inc.

8.8M

% of company

7.92%

Change vs last qtr

−1.8K (−0.0%)

Held since

2022

28 more super investors behind a free account

See every manager holding Amylyx Pharmaceuticals, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting AMLX on Form N-PORT; together they hold 35.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$56.7M	3.2M	2.83%	0.00%	June 30, 2026
SH Select Health Care Portfolio Fidelity Select Portfolios	$54M	1.6M	1.44%	0.80%	August 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$56.7M

% of company

2.83%

% of the fund

0.00%

As of

June 30, 2026

Select Health Care Portfolio

Fidelity Select Portfolios

Position value

$54M

% of company

1.44%

% of the fund

0.80%

As of

August 31, 2026

23 more funds behind a free account

See every fund holding Amylyx Pharmaceuticals, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
CJ Cohen Joshua B Insider	3.6M	3.24%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company3.240% Cohen Joshua B's insider activity →
KJ Klee Justin B. Insider	3.6M	3.24%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company3.240% Klee Justin B.'s insider activity →

Cohen Joshua B

Insider

3.6M

% of company

3.24%

Change vs last qtr

—

Held since

—

Klee Justin B.

Insider

3.6M

% of company

3.24%

Change vs last qtr

—

Held since

—

6 more holders behind a free account

See every insider and 5%+ holder of Amylyx Pharmaceuticals, Inc..

Comments