Joseph Anthony Metzinger - 23 Dec 2025 Form 4 Insider Report for DYNAVAX TECHNOLOGIES CORP (DVAX)

Role
VP, Chief Accounting Officer
Signature
Joseph A. Metzinger, by /s/ Trevor Dutcher, Attorney-in-Fact
Issuer symbol
DVAX
Transactions as of
23 Dec 2025
Net transactions value
-$86,097
Form type
4
Filing time
29 Dec 2025, 16:12:10 UTC
Previous filing
13 May 2025
Next filing
10 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Metzinger Joseph Anthony VP, Chief Accounting Officer C/O DYNAVAX TECHNOLOGIES, 2100 POWELL STREET, SUITE 720, EMERYVILLE Joseph A. Metzinger, by /s/ Trevor Dutcher, Attorney-in-Fact 29 Dec 2025 0002067729

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DVAX Common Stock Options Exercise +12,727 12,727 23 Dec 2025 Direct F1, F2
transaction DVAX Common Stock Tax liability $86,097 -5,598 -44% $15.38 7,129 24 Dec 2025 Direct F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction DVAX Restricted Stock Unit Options Exercise -12,727 -33% 25,455 23 Dec 2025 Common Stock 12,727 Direct F1, F2, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 On December 23, 2025 (the "Effective Date"), in connection with the execution of an Agreement and Plan of Merger dated as of the Effective Date (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, the Board of Directors of the Issuer approved acceleration of vesting of certain restricted stock units ("RSUs") previously granted to the Reporting Person, effective as of the Effective Date.
F2 Each RSU represents a contingent right to receive one share of the Issuer's common stock.
F3 Shares withheld by the Issuer to satisfy tax withholding requirements on vesting of restricted stock units.
F4 The RSUs were granted on May 12, 2025, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of May 12, 2025.