0001415889-24-014705.txt : 20240528 0001415889-24-014705.hdr.sgml : 20240528 20240528181359 ACCESSION NUMBER: 0001415889-24-014705 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240523 FILED AS OF DATE: 20240528 DATE AS OF CHANGE: 20240528 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Dable Habib J CENTRAL INDEX KEY: 0001690773 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-40431 FILM NUMBER: 24993438 MAIL ADDRESS: STREET 1: C/O ACCELERON PHARMA INC. STREET 2: 128 SIDNEY STREET CITY: CAMBRIDGE STATE: MA ZIP: 02139 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Day One Biopharmaceuticals, Inc. CENTRAL INDEX KEY: 0001845337 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 832415215 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 2000 SIERRA POINT PARKWAY, SUITE 501 CITY: BRISBANE STATE: CA ZIP: 94005 BUSINESS PHONE: 650 484-0899 MAIL ADDRESS: STREET 1: 2000 SIERRA POINT PARKWAY, SUITE 501 CITY: BRISBANE STATE: CA ZIP: 94005 FORMER COMPANY: FORMER CONFORMED NAME: Day One Biopharmaceuticals Holding Co LLC DATE OF NAME CHANGE: 20210209 4 1 form4-05282024_100554.xml X0508 4 2024-05-23 0001845337 Day One Biopharmaceuticals, Inc. DAWN 0001690773 Dable Habib J 2000 SIERRA POINT PARKWAY, SUITE 501 BRISBANE CA 94005 true false false false 0 Stock Option (right to buy Common Stock) 13.87 2024-05-23 4 A 0 32335 0 A 2034-05-22 Common Stock 32335 32335 D The option vests as to 1/12th of the total grant on each monthly anniversary, beginning on June 23, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date. /s/ Charles N. York II, as Attorney-in-Fact 2024-05-28