DYNAVAX TECHNOLOGIES CORP — Director's Dealing 2026

Jan 20, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DYNAVAX TECHNOLOGIES CORP (DVAX)
CIK: 0001029142
Period of Report: 2026-01-15

Reporting Person: Novack David F (President & COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-15	Common Stock	M	20000	$6.805	Acquired	83344	Direct
2026-01-15	Common Stock	M	94000	$10.47	Acquired	177344	Direct
2026-01-15	Common Stock	S	114000	$15.64	Disposed	63344	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-15	Stock Option (Right to Buy)	$6.805	M	20000	Disposed	2026-12-15	Common Stock (20000)	Direct
2026-01-15	Stock Option (Right to Buy)	$10.47	M	85655	Disposed	2026-02-21	Common Stock (85655)	Direct
2026-01-15	Stock Option (Right to Buy)	$10.47	M	8345	Disposed	2026-02-21	Common Stock (8345)	Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a 10b5-1 trading plan adopted on December 6, 2024.

F2: This transaction was executed in multiple trades at prices ranging from $15.585 to $15.665; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at
which the transactions were effected upon request to the SEC staff, Dynavax, or a security holder of Dynavax.

F3: Fully vested.

F4: Not applicable.