Company: DVAX
Filing Date: 2025-04-21
Form Type: DEFC14A
Source: 0001193125-25-087127
Chunk: 28

Company: DYNAVAX TECHNOLOGIES CORP
Filing Date: 2025-04-21
Form: DEFC14A
Chunk 28
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 use the Company’s gold proxy card or voting instruction form, regardless of how you wish to vote.

The Company has a classified Board, which is currently divided into three classes. The terms of four Class I directors expire at the 2025
Annual Meeting. Through the attached Proxy Statement and enclosed WHITEproxy card, we are soliciting proxies to elect the four Deep Track Nominees.

Stockholders are permitted to vote for less than four nominees or for any combination (up to four total) of the Deep Track Nominees and the
Company’s nominees on the WHITEproxy card. The Deep Track Parties urge Stockholders to use our WHITEproxy card to vote “FOR”all four of the Deep Track Nominees.

IMPORTANTLY, IF YOU MARK MORE THAN FOUR “FOR” BOXES WITH RESPECT TO THE ELECTION OF DIRECTORS, ALL OF YOUR VOTES FOR THE ELECTION OF DIRECTORS WILL BE DEEMED INVALID.

Quorum; Abstentions and Broker Non-Votes;No Discretionary Voting

A quorum of Stockholders is necessary to hold a valid meeting. According to the Company’s proxy statement, a quorum will be
present if Stockholders holding at least a majority of the outstanding shares of Common Stock entitled to vote are present virtually at the 2025 Annual Meeting or represented by proxy. According to the Company’s proxy statement, at the close of
business on the Record Date, there were 122,411,685 shares of Common Stock outstanding. Thus, a total of 122,411,685 shares are entitled to vote at the 2025 Annual Meeting and holders of Common Stock representing at least 61,205,843 votes
must be represented at the 2025 Annual Meeting or by proxy to have a quorum.

Your shares will be counted towards the quorum only if you
submit a valid proxy (or if one is submitted on your behalf by your broker, bank or other agent) or if you vote at the 2025 Annual Meeting. According to the Company’s proxy statement, if there is no quorum, the chairman of the meeting or the
Stockholders holding a majority of the shares present virtually at the 2025 Annual Meeting or represented by proxy may adjourn the 2025 Annual Meeting to another date.

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If you are a beneficial owner, your broker will vote your shares pursuant to your
instructions. Based on information contained in the Company’s proxy statement, brokers will not have discretionary authority to vote on any of the proposals at the