Company · Ownership research

Amylyx Pharmaceuticals, Inc. AMLX

CIK 0001658551

Form 4 transactions dated Nov 1, 2023 to Nov 8, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

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 ·

202510 of 24 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 23, 2025	Firestone Karen Director	Purchase	$100.84K 8,100 shares bought	14.73% added Direct holding	▾
Dec 1, 2025	Bedrosian Camille L Chief Medical Officer	Sale	$94.42K 6,580 shares sold	3.61% sold Direct holding	▾
Sep 30, 2025	Klee Justin B. Co-Chief Executive Officer · Director	Sale	$430.95K 29,975 shares sold	0.89% sold Direct holding	▾
Sep 30, 2025	Mazzariello Gina Chief Legal Officer	Sale	$128.67K 8,828 shares sold	5.62% sold Direct holding	▾
Sep 30, 2025	FRATES JAMES M Chief Financial Officer	Sale	$154.65K 10,558 shares sold	3.63% sold Direct holding	▾
Sep 30, 2025	Cohen Joshua B Co-Chief Executive Officer · Director	Sale	$429.47K 29,933 shares sold	0.89% sold Direct holding	▾
Sep 30, 2025	Bedrosian Camille L Chief Medical Officer	Sale	$175.52K 12,039 shares sold	6.19% sold Direct holding	▾
Aug 13, 2025	Mazzariello Gina Chief Legal Officer	Sale10b5-1 footnote	$125.05K 15,000 shares sold	8.72% sold Direct holding	▾
Aug 12, 2025	Mazzariello Gina Chief Legal Officer	Sale10b5-1 footnote	$121.10K 15,000 shares sold	8.02% sold Direct holding	▾
Mar 31, 2025	FRATES JAMES M Chief Financial Officer	Sale	$37.81K 10,896 shares sold	3.61% sold Direct holding	▾

Showing 24 / 24 record groups in 2025. The complete set is available through the API.

Amylyx Pharmaceuticals, Inc. · AMLX

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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.