0001744507-26-000005.txt : 20260423 0001744507-26-000005.hdr.sgml : 20260423 20260423163815 ACCESSION NUMBER: 0001744507-26-000005 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260423 FILED AS OF DATE: 20260423 DATE AS OF CHANGE: 20260423 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Dubow Adam CENTRAL INDEX KEY: 0001744507 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-40431 FILM NUMBER: 26889216 MAIL ADDRESS: STREET 1: DAY ONE BIOPHARMACEUTICALS, INC. STREET 2: 2000 SIERRA POINT PARKWAY, SUITE 501 CITY: BRISBANE STATE: CA ZIP: 94005 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 EIN: 832415215 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1800 SIERRA POINT PARKWAY, SUITE 200 CITY: BRISBANE STATE: CA ZIP: 94005 BUSINESS PHONE: 650 484-0899 MAIL ADDRESS: STREET 1: 1800 SIERRA POINT PARKWAY, SUITE 200 CITY: BRISBANE STATE: CA ZIP: 94005 FORMER COMPANY: FORMER CONFORMED NAME: Day One Biopharmaceuticals Holding Co LLC DATE OF NAME CHANGE: 20210209 4 1 form4-04232026_080411.xml X0609 4 2026-04-23 1 0001845337 Day One Biopharmaceuticals, Inc. DAWN 0001744507 Dubow Adam false 1800 SIERRA POINT PARKWAY, SUITE 200 BRISBANE CA 94005 false true false false Gen Counsel & Secretary 0 Common Stock 2026-04-23 4 D 0 72694 D 0 D Stock Option (right to buy Common Stock) 8.99 2026-04-23 4 D 0 309000 D 2032-10-30 Common Stock 309000 0 D Stock Option (right to buy Common Stock) 8.99 2026-04-23 4 D 0 90000 D 2033-01-16 Common Stock 90000 0 D Stock Option (right to buy Common Stock) 8.99 2026-04-23 4 D 0 90000 D 2034-01-04 Common Stock 90000 0 D Stock Option (right to buy Common Stock) 8.99 2026-04-23 4 D 0 90000 D 2035-01-14 Common Stock 90000 0 D Stock Option (right to buy Common Stock) 11.16 2026-04-23 4 D 0 105000 D 2036-01-29 Common Stock 105000 0 D Restricted Stock Unit (RSU) 2026-04-23 4 D 0 8889 D Common Stock 8889 0 D Restricted Stock Unit (RSU) 2026-04-23 4 D 0 5250 D Common Stock 5250 0 D Restricted Stock Unit (RSU) 2026-04-23 4 D 0 25816 D Common Stock 25816 0 D Restricted Stock Unit (RSU) 2026-04-23 4 D 0 40565 D Common Stock 40565 0 D Restricted Stock Unit (RSU) 2026-04-23 4 D 0 65625 D Common Stock 65625 0 D On March 6, 2026, Servier Pharmaceuticals LLC, a Delaware limited liability company ("Parent"), Servier Detroit Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), Day One Biopharmaceuticals, Inc., a Delaware corporation (the "Company"), and Servier S.A.S., a French societe par actions simplifiee, solely as a guarantor, entered into an Agreement and Plan of Merger (the "Merger Agreement"). Pursuant to the Merger Agreement, the Merger Sub merged with and into the Company (such merger and the other transactions contemplated by the Merger Agreement, the "Merger") with the Company surviving the Merger as a wholly owned subsidiary of the Parent. Upon the closing of the Merger on April 23, 2026, each issued and outstanding share of the Company's Common Stock, par value $0.0001 per share, was either (x) purchased for $21.50 per share (the "Offer Price"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement, or (y) automatically converted into the right to receive the Offer Price (the "Merger Consideration"), net to the seller in cash, without interest, and subject to applicable withholding taxes, on the terms and conditions set forth in the Merger Agreement. The option vests as to 100% of the total shares on November 6, 2026, subject to the Reporting Person's provision of service to the Issuer on such vesting date. Immediately prior to the effective time of the Merger, all outstanding unvested stock options and unvested restricted stock units became fully vested. At the effective time of the Merger, each stock option and restricted stock unit was canceled and converted into the right to receive an amount in cash equal to the Merger Consideration (or, in the case of stock options, the difference between the Merger Consideration and the applicable per share exercise price), less any applicable withholding taxes. The option vests as to 1/48th of the total shares monthly, commencing February 17, 2023, subject to the Reporting Person's provision of service to the Issuer on each vesting date. The option vests as to 1/48th of the total shares monthly, commencing February 5, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date. The option vests as to 1/48th of the total shares monthly, commencing February 15, 2025, subject to the Reporting Person's provision of service to the Issuer on each vesting date. The option vests as to 1/48th of the total shares monthly, commencing February 28, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The Restricted Stock Units ("RSUs") vest as to 25% of the total award on November 15, 2023, and 1/12th of the remaining amount vests in quarterly installments on February 15, May 15, August 15 and November 15, subject to the Reporting Person's provision of service to the Issuer on each vesting date. RSUs do not expire; they either vest or are canceled prior to the vesting date. The RSUs will vest as to 1/16th of the total award in quarterly installments on February 15, May 15, August 15 and November 15, 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 2026-04-23