Company: DAWN
Filing Date: 2025-03-06
Form Type: 10-K/A
Source: 0000950170-25-034878
Chunk: 2

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-03-06
Form: 10-K/A
Chunk 2
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 the shares of common stock on June 30, 2024, was approximately $971.5million.

The number of shares of Registrant’s Common Stock outstanding as of February 20, 2025 was101,354,516.

<div align='center'>DOCUMENTS INCORPORATED BY REFERENCE</div>

Portions of the registrant’s Definitive Proxy Statement relating to the 2025 Annual Meeting of Shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein. The Definitive Proxy Statement will be filed within 120 days of the Registrant’s fiscal year ended December 31, 2024. Except with respect to information specifically incorporated by reference in this Form 10-K, the Proxy Statement is not deemed to be filed as part of this Form 10-K.

<div align='center'>EXPLANATORY NOTE</div>

This Amendment No. 1 on Form 10-K/A (“Amendment No. 1”) is being filed to amend our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (“the “Original Filing”), filed with the U.S. Securities and Exchange Commission on February 25, 2025 (the “Original Filing Date”). The sole purpose of this Amendment No. 1 is to (i) amend the Consent filed as Exhibit 23.1 in the Original Filing, which did not conform with the consent provided by the Company's Independent Registered Public Accounting Firm as it inadvertently referenced the incorrect date with respect to the Report of Independent Registered Public Accounting Firm, omitted reference to the Company’s Registration Statement No. 333-284210 on Form S-8 and Registration Statement No. 333-281822 on Form S-3 and referenced the incorrect location of the office of the Independent Registered Public Accounting Firm and (ii) amend the reports that include reference to “Report of Independent Registered Public Accounting Firm” contained in Part II, Item 8 “Financial Statements and Supplementary Data” of the Original Filing (the “Audit Reports”), which inadvertently contained incorrect references between the Audit Reports and the financial statements.

Except as described above, no changes have been made to the Original Filing and this Amendment No. 1 does not restate, amend or update in any way any of the financial or other information contained in the Original Filing. This Amendment No. 1 does not reflect events that may have occurred subsequent to the Original Filing Date. Pursuant