Company: DAWN
Filing Date: 2025-08-05
Form Type: 10-Q
Source: 0000950170-25-103012
Chunk: 4

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-08-05
Form: 10-Q
Item: Item 6
Chunk 4
---
The exhibits filed or furnished as part of this Quarterly Report on Form 10-Q are set forth on the Exhibit Index below. 

     Incorporated by Reference  

     ExhibitNumber 
     Description 
     Form  
     File No.  
     FilingDate  
     Exhibit  
     Filed/FurnishedHerewith  

       31.1
     Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 

     X

       31.2
     Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

     X

       32.1*
     Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 

     X

       32.2*
     Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

     X

     101.INS
     Inline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document).

     X

     101.SCH
     Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents.

     X

     104
     Cover Page Interactive Data File (embedded within the Inline XBRL document)

     X

* 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.