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

Reporting relationship: VP, Chief Accounting Officer
Issuer ticker: DVAX
Reported as of: 23 Dec 2025
Net transaction value: -$86,097
SEC form: 4
Accepted by SEC: 29 Dec 2025, 16:12:10 UTC
Prior SEC filing: 13 May 2025
Next SEC filing: 10 Feb 2026
Source filing: View source filing
Reporting owner signature: Joseph A. Metzinger, by /s/ Trevor Dutcher, Attorney-in-Fact

Key filing fact

Joseph Anthony Metzinger filed Form 4 for DYNAVAX TECHNOLOGIES CORP (DVAX) on 29 Dec 2025.

Key facts

This page summarizes Joseph Anthony Metzinger's Form 4 filing for DYNAVAX TECHNOLOGIES CORP (DVAX).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 29 Dec 2025, 16:12.

Change

Previous filing in this sequence was filed on 13 May 2025.
Current net transaction value: -$86,097.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002067729 Primary reporting owner

Metzinger Joseph Anthony

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

DVAX transaction

Common Stock

Options Exercise

Transaction value
Shares: +12,727
Change %
Price
Shares after: 12,727
Date: 23 Dec 2025
Ownership: Direct
Footnotes: F1, F2

DVAX transaction

Common Stock

Tax liability

Transaction value: $86,097
Shares: -5,598
Change %: -44%
Price: $15.38
Shares after: 7,129
Date: 24 Dec 2025
Ownership: Direct
Footnotes: F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

DVAX transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value
Shares: -12,727
Change %: -33%
Price
Shares after: 25,455
Date: 23 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,727
Exercise price
Footnotes: F1, F2, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote 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.

Footnote F2

Each RSU represents a contingent right to receive one share of the Issuer's common stock.

Footnote F3

Shares withheld by the Issuer to satisfy tax withholding requirements on vesting of restricted stock units.

Footnote 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.