0001415889-24-017877.txt : 20240621 0001415889-24-017877.hdr.sgml : 20240621 20240621191718 ACCESSION NUMBER: 0001415889-24-017877 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240621 FILED AS OF DATE: 20240621 DATE AS OF CHANGE: 20240621 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Ramasastry Saira CENTRAL INDEX KEY: 0001547959 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-40431 FILM NUMBER: 241061745 MAIL ADDRESS: STREET 1: 501 CANAL BLVD. CITY: RICHMOND STATE: CA ZIP: 94804 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 form4-06212024_110615.xml X0508 4 2024-06-21 0001845337 Day One Biopharmaceuticals, Inc. DAWN 0001547959 Ramasastry Saira 2000 SIERRA POINT PARKWAY, SUITE 501 BRISBANE CA 94005 true false false false 0 Common Stock 2024-06-21 4 S 0 10000 13.1877 D 40485 D The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.91 to $13.545 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Charles N. York II, as Attorney-in-Fact 2024-06-21