SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR (g) OF

THE SECURITIES EXCHANGE ACT OF 1934

DYNAVAX TECHNOLOGIES

CORPORATION

(Exact Name of Registrant as Specified in its Charter)

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

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), please check the following box. ☒

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), check the following. ☐

If this form relates to the registration of a class of securities concurrently with a Regulation A offering, check the following box. ☐

Securities Act registration statement or Regulation A offering statement file number to which this form

relates (if applicable):

Not applicable.

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

None

On October 28, 2024, the Board of Directors (the “Board”) of Dynavax Technologies Corporation (the “Company”), a Delaware corporation, declared a dividend of one preferred share purchase right (“Right”) for each outstanding share of common stock, par value $0.001 per share, of the Company, and adopted a stockholder rights plan, as set forth in the Rights Agreement, dated as of October 28, 2024 (the “Rights Agreement”), by and between the Company and Computershare Trust Company, N.A., as rights agent. The dividend is payable on November 8, 2024 to stockholders of record of the Company as of the close of business on November 8, 2024.

Each Right will allow its holder to purchase from the Company one one-thousandth of a share of Series A Junior Participating Preferred Stock, par value $0.001 per share, for $52.00, once the Rights become exercisable.

The Rights are in all respects subject to and governed by the provisions of the Rights Agreement, which is incorporated herein by reference. The description of the Rights is incorporated herein by reference to the description set forth under Items 1.01, 3.03 and 5.03 of the Company’s Current Report on Form 8-K filed on October 29, 2024 and is qualified in its entirety by reference to the full text of the Rights Agreement included as Exhibit 4.1 to such Current Report.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrant has caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized.