Company: DAWN
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0001140361-25-013462
Chunk: 7

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 7
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 filling out and returning the proxy card. Beneficial Owner: Shares Registered in the Name of a Broker or Nominee. If, on the Record Date, your shares were held in an account with a brokerage firm, bank or other nominee, then you are the beneficial owner of the shares held in street name. As a beneficial owner, you have the right to direct your nominee on how to vote the shares held in your account, and your nominee has enclosed or provided voting instructions for you to use in directing it on how to vote your shares. However, the organization that holds your shares is considered the stockholder of record for purposes of voting at the Annual Meeting. Because you are not the stockholder of record, you may not vote your shares at the Annual Meeting unless you request and obtain a valid proxy from the organization that holds your shares giving you the right to vote the shares at the Annual Meeting. Each director will be elected by a plurality of the votes cast, which means that the two individuals nominated for election to our board of directors at the Annual Meeting (“Proposal No. 1”) receiving the highest number of “FOR” votes will be elected. You may vote “FOR ALL NOMINEES,” “WITHHOLD AUTHORITY FOR ALL NOMINEES” or “FOR ALL EXCEPT” one or any of the nominees you specify. Ratification of the appointment of PwC as our independent registered public accounting firm for the year ending December 31, 2025 (“Proposal No. 2”)

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will be obtained if the number of votes cast “FOR” the proposal at the Annual Meeting exceeds the number of votes “AGAINST” the proposal. Approval, on a non-binding advisory basis, of the compensation of our named executive officers (“Proposal No. 3”) will be obtained if the number of votes cast “FOR” the proposal at the Annual Meeting exceeds the number of votes “AGAINST” the proposal. Under the Delaware General Corporation Law (“DGCL”), abstentions (shares present at the Annual Meeting and marked “ABSTAIN”) and “WITHHOLD AUTHORITY” votes are counted for purposes of determining whether a quorum is present. At the Annual Meeting, abstentions and proxies marked “WITHHOLD AUTHORITY” will have no effect on Proposal No. 1, Proposal No. 2 or Proposal No. 3. Broker non-votes occur when shares held by a broker for a beneficial owner are not voted either because (i) the broker did not receive