Company: DAWN
Filing Date: 2025-11-04
Form Type: 10-Q
Source: 0001193125-25-264649
Chunk: 125

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-11-04
Form: 10-Q
Item: Item 3
Chunk 125
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 5. Other Information. Insider Trading Policies and ArrangementsThe Company’s directors and Section 16 officers (as defined in Rule 16a-1(f) under the Exchange Act) are only permitted to trade in the Company’s securities pursuant to a prearranged trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act, or a Rule 10b5-1 Plan. During the three months ended September 30, 2025, none of the Company’s Section 16 officers or directors adopted or terminated any Rule 10b5-1 Plan. 

98

Item 6. Exhibits. 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