Company · Ownership research

Amylyx Pharmaceuticals, Inc. AMLX

CIK 0001658551

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 32 rows; the complete set is available through the API.

Insider filings on file run through Oct 7, 2026.

Insider purchases & sales

Purchased: $686.26K
Sold: $12.95M

Nov 1, 2023 – Oct 7, 2026
Available records · partial months are marked ·

202610 of 26 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 5, 2026	MILNE GEORGE M JR Director	Sale10b5-1 footnote	$830.90K 30,000 shares sold	3.69% sold Direct holding	▾
Sep 10, 2026	Bedrosian Camille L Chief Medical Officer	Sale	$324.87K 10,028 shares sold	3.48% sold Direct holding	▾
Sep 10, 2026	FRATES JAMES M Chief Financial Officer	Sale	$349.82K 10,810 shares sold	4.42% sold Direct holding	▾
Sep 10, 2026	Mazzariello Gina Chief Legal Officer	Sale	$309.51K 9,536 shares sold	4.76% sold Direct holding	▾
Sep 10, 2026	Cohen Joshua B Co-Chief Executive Officer · Director	Sale	$980.50K 30,464 shares sold	0.84% sold Direct holding	▾
Sep 10, 2026	Klee Justin B. Co-Chief Executive Officer · Director	Sale	$980.26K 30,464 shares sold	0.84% sold Direct holding	▾
Jul 10, 2026	Mazzariello Gina Chief Legal Officer	Sale10b5-1 footnote	$264.12K 15,000 shares sold	7.73% sold Direct holding	▾
Jul 9, 2026	Mazzariello Gina Chief Legal Officer	Sale10b5-1 footnote	$274.75K 15,000 shares sold	7.17% sold Direct holding	▾
May 21, 2026	Firestone Karen Director	Purchase	$51.34K 3,800 shares bought	6.02% added Direct holding	▾
Mar 2, 2026	Klee Justin B. Co-Chief Executive Officer · Director	Sale	$423.76K 29,282 shares sold	0.87% sold Direct holding	▾

Showing 26 / 26 record groups in 2026. The complete set is available through the API.

Amylyx Pharmaceuticals, Inc. · AMLX

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 26 of 26 purchase / sale groups and 30 of 32 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"AMLX","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.