Company: DVAX
Filing Date: 2025-06-09
Form Type: DEFA14A
Source: 0001193125-25-137437
Chunk: 0

Company: DYNAVAX TECHNOLOGIES CORP
Filing Date: 2025-06-09
Form: DEFA14A
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material Pursuant to §240.14a-12 |

Dynavax Technologies Corporation (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement if other than the Registrant) Payment of Filing Fee (Check the appropriate box):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rule 
 14a-6(i)(1) and 0-11.                                                         |

This Schedule 14A filing consists of the following press release distributed by Dynavax Technologies Corporation (the “Company”) to its stockholders in connection with the Company’s 2025 Annual Meeting of Stockholders. The press release was first used or made available on June 9, 2025. Dynavax Urges Stockholders to Support Its Director Nominees at June 11 Annual Meeting Dynavax’s Strategy is Delivering Significant Long-Term Stockholder Value Dynavax’s Nominees Are Vastly Superior to Deep Track’s Candidates Across Every Critical Area Follow Recommendations of Proxy Advisory Firms ISS and Egan-Jones and Vote “FOR” All Four of Dynavax’s Director Nominees on the GOLD Proxy Card Today EMERYVILLE, Calif., June 9, 2025 — Dynavax Technologies Corporation (Nasdaq: DVAX) (“Dynavax” or the “Company”), a commercial-stage biopharmaceutical company developing and commercializing innovative vaccines, today issued the following statement reiterating to stockholders its recommendation to vote “FOR” all four of Dynavax’s highly qualified directors standing for election – Brent MacGregor, Scott Myers, Lauren Silvernail and Elaine Sun – at the Company’s upcoming Annual Meeting of Stockholders on June 11,