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):   November 29, 2018

Dynavax Technologies Corporation

(Exact name of registrant as specified in its charter)

Commission File Number:  001-34207

2929 Seventh Street, Suite 100

Berkeley, CA 94710-2753

(Address of principal executive offices, including zip code)

(510) 848-5100

(Registrant’s telephone number, including area code)

(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))

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 8.01.    Other Events

Dynavax Technologies Corporation (“Dynavax”) has been informed by its collaborator, AstraZeneca, that initial high-level results from a Phase 2a study indicate AZD1419 treatment was not associated with a statistically significant improvement in the time to loss of asthma control and therefore did not meet the primary endpoint of the study. The treatment appeared to be safe and well tolerated and the study confirmed activation of the TLR9 pathway. AZD1419 is an investigational TLR9 agonist developed by Dynavax in collaboration with AstraZeneca. The proposed mechanism of action of AZD1419 is distinct from that of the other TLR9 agonists being developed by Dynavax for immuno-oncology and vaccine applications.  AstraZeneca will now review the full data before deciding on the next steps for the AZD1419 program. The data will be presented at a future medical meeting.

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 hereunto duly authorized.