Joseph Anthony Metzinger - 10 Feb 2026 Form 4 Insider Report for DYNAVAX TECHNOLOGIES CORP (DVAX)

Role: VP, Chief Accounting Officer
Signature: Joseph Metzinger, by /s/ Trevor Dutcher, Attorney-in-fact
Issuer symbol: DVAX
Transactions as of: 10 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 10 Feb 2026, 16:15:25 UTC
Previous filing: 29 Dec 2025
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 Metzinger, by /s/ Trevor Dutcher, Attorney-in-fact	10 Feb 2026	0002067729

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DVAX	Common Stock	Disposition pursuant to a tender of shares in a change of control transaction		-7,129	-100%		0	10 Feb 2026	Direct	F1, F2, 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	Stock Option (Right to Buy)	Disposed to Issuer		-31,500	-100%		0	10 Feb 2026	Common Stock	31,500	$9.85	Direct	F1, F2, F4, F5
transaction	DVAX	Restricted Stock Units	Disposed to Issuer		-25,455	-100%		0	10 Feb 2026	Common Stock	25,455		Direct	F1, F2, F6, F7

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Joseph Anthony Metzinger is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id	Content
F1	This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").
F2	Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").
F3	Pursuant to the terms of the Merger Agreement, at the Effective Time, each share of Common Stock held by the Reporting Person was tendered in exchange for the Offer Price.
F4	The stock option was granted to the Reporting Person in 2025.
F5	Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.
F6	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.
F7	Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.