SEC Form 4 reporting owner

Klee Justin B.

Klee Justin B. has filed 12 Form 4 transactions reported between January 6, 2026 and September 10, 2026, as Co-Chief Executive Officer of Amylyx Pharmaceuticals, Inc..

Name as filed: Klee Justin B.

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$3.6M

7 lines

Companies

with Form 4 filings

Latest transaction

Sep 10, 2026

transaction date

Roles and reported holdings

AMLXAmylyx Pharmaceuticals, Inc.
Jan 6, 2026 – Sep 10, 2026
Co-Chief Executive Officer
Held directly3,613,056 sh as of Sep 10, 2026 · Form 4
24 months: $3.6M sold

Transaction history

All 12 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 10, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	1,439	$33.16	$48K@ $33.16	3,613,056	Form 4
Sep 10, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	29,025	$32.13	$933K@ $32.13	3,614,495	Form 4
Aug 18, 2026	AMLXCo-Chief Executive Officer	Grant or awardCode A · direct	60,039	—	—	3,643,520	Form 4
Mar 5, 2026	AMLXCo-Chief Executive Officer	Grant or awardCode A · direct	373,295	—	—	373,295	Form 4
Mar 5, 2026	AMLXCo-Chief Executive Officer	Grant or awardCode A · direct	248,865	—	—	3,583,481	Form 4
Mar 2, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	29,282	$14.47	$424K@ $14.47	3,334,616	Form 4
Feb 2, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	15,500	$14.69	$228K@ $14.69	3,363,898	Form 4
Jan 16, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	1,995	$13.89	$28K@ $13.89	3,379,398	Form 4
Jan 16, 2026	AMLXCo-Chief Executive Officer	Option exerciseCode M · direct	2,847	$7.57	$22K@ $7.57	3,381,393	Form 4
Jan 15, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	136,193	$13.58	$1.8M@ $13.58	3,378,546	Form 4
Jan 15, 2026	AMLXCo-Chief Executive Officer	Option exerciseCode M · direct	197,153	$7.57	$1.5M@ $7.57	3,514,739	Form 4
Jan 6, 2026	AMLXCo-Chief Executive Officer	Open-market saleCode S · direct	7,715	$11.09	$86K@ $11.09	3,317,586	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.