Company: DAWN
Filing Date: 2025-02-25
Form Type: 10-K
Source: 0000950170-25-026654
Chunk: 280

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-02-25
Form: 10-K
Item: Item 1B
Chunk 280
---
 supplementally a copy of the omitted schedules and exhibits to the SEC upon request

**	This certification is deemed not filed for purposes of section 18 of the Exchange Act or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act.

Item 16. Form 10-K Summary

None.

131

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

    DAY ONE BIOPHARMACEUTICALS, INC.

    Date: February 25, 2025
     
    By:
    /s/ Jeremy Bender, Ph.D., M.B.A.

    Jeremy Bender, Ph.D., M.B.A.

    Chief Executive Officer and President (Principal Executive Officer)

    DAY ONE BIOPHARMACEUTICALS, INC.

    Date: February 25, 2025
     
    By:
    /s/ Charles N. York II, M.B.A.

    Charles N. York II, M.B.A.

    Chief Operating Officer and Chief Financial Officer(Principal Financial and Accounting Officer)

132

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Jeremy Bender, Ph. D., M.B.A and Charles N. York II, M.B.A., and each of them, with full power of substitution and resubstitution and full power to act without the other, as his or her true and lawful attorney-in-fact and agent to act in his or her name, place and stead and to execute in the name and on behalf of each person, individually and in each capacity stated below, and to file any and all amendments to this Annual Report on Form 10-K and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing, ratifying and confirming all that said attorneys-in-fact and agents or any of them or their or his substitute or substitutes may lawfully do or cause to be done by virtue thereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as