0001193125-26-380152.txt : 20260902 0001193125-26-380152.hdr.sgml : 20260902 20260902160027 ACCESSION NUMBER: 0001193125-26-380152 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260831 FILED AS OF DATE: 20260902 DATE AS OF CHANGE: 20260902 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Firestone Karen CENTRAL INDEX KEY: 0001969821 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41199 FILM NUMBER: 261354607 MAIL ADDRESS: STREET 1: C/O AMYLYX PHARMACEUTICALS, INC. STREET 2: 43 THORNDIKE ST. CITY: CAMBRIDGE STATE: MA ZIP: 02141 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Amylyx Pharmaceuticals, Inc. CENTRAL INDEX KEY: 0001658551 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 464600503 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 55 CAMBRIDGE PARKWAY STREET 2: SUITE 6W CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 617-682-0917 MAIL ADDRESS: STREET 1: 55 CAMBRIDGE PARKWAY STREET 2: SUITE 6W CITY: CAMBRIDGE STATE: MA ZIP: 02142 4 1 ownership.xml 4 X0609 4 2026-08-31 0001658551 Amylyx Pharmaceuticals, Inc. AMLX 0001969821 Firestone Karen false C/O AMYLYX PHARMACEUTICALS, INC. 55 CAMBRIDGE PARKWAY, SUITE 6W CAMBRIDGE MA 02142 true false false false false Common Stock 2026-08-31 4 M false 25000 1.76 A 91900 D Common Stock 2026-08-31 4 M false 25000 5.05 A 116900 D Stock Option (right to buy) 1.76 2026-08-31 4 M false 25000 0 D 2034-06-05 Common Stock 25000 0 D Stock Option (right to buy) 5.05 2026-08-31 4 M false 25000 0 D 2035-06-04 Common Stock 25000 0 D This option is fully vested and exercisable. /s/ Joshua B. Cohen, as Attorney in Fact 2026-09-02