DYNAVAX TECHNOLOGIES CORP false 0001029142 0001029142 2025-08-21 2025-08-21

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 21, 2025

Dynavax Technologies Corporation

(Exact name of Registrant as Specified in Its Charter)

Delaware |  | 001-34207 |  | 33-0728374
(State or Other Jurisdiction of Incorporation) |  | (Commission File Number) |  | (IRS Employer Identification No.)

2100 Powell Street, Suite 720 |  |
Emeryville, California |  | 94608
(Address of Principal Executive Offices) |  | (Zip Code)

Registrant’s Telephone Number, Including Area Code: (510) 848-5100

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common Stock, $0.001 par value |  | DVAX |  | Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01 | Regulation FD Disclosure.

On August 21, 2025, Dynavax Technologies Corporation (“Dynavax” or the “Company”) issued a press release announcing topline results from Part 1 of its randomized, observer-blinded, and active-controlled Phase 1/2 clinical trial of Z-1018, the Company’s novel shingles vaccine candidate, head-to-head versus Shingrix in participants aged 50 to 69 years. The Company has also updated its corporate presentation to include information regarding the Phase 1/2 clinical trial. Copies of the press release and the presentation are attached as Exhibit 99.1 and Exhibit 99.2 to this Current Report on Form 8-K, respectively.

All of the information furnished in this Current Report on Form 8-K, including the accompanying Exhibits, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained in this Current Report on Form 8-K and in the accompanying exhibits shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by Dynavax, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01. | Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number |  | Description
99.1 |  | Press release dated August 21, 2025
99.2 |  | Corporate Presentation
104 |  | Cover Page Interactive Data (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

|  |  |  |  |  | Dynavax Technologies Corporation
Date: August 21, 2025 |  |  |  | By: |  | /s/ RYAN SPENCER
|  |  |  |  |  | RYAN SPENCER Chief Executive Officer