Company: DVAX
Filing Date: 2025-04-03
Form Type: PREC14A
Source: 0000930413-25-001153
Chunk: 133

Company: DYNAVAX TECHNOLOGIES CORP
Filing Date: 2025-04-03
Form: PREC14A
Chunk 133
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 electronic vote authorizes the named proxies to vote your shares in the same manner as if you marked,
signed, dated and returned the proxy card. Votes submitted electronically over the Internet must be received by 8:59 p.m., Pacific
Time, on [●], 2025.

VOTE BY INTERNET – WWW.CESVOTE.COM

Use the Internet to transmit your voting instructions prior to the closing of the polls
at the Annual Meeting. Have this proxy card in hand when you access the web site and follow the instructions to create an electronic
voting instruction form.

<div align='center'>OR</div>

VOTE BY TELEPHONE – 1-888-693-8683

Use any touch-tone telephone to transmit your voting instructions prior to the closing
of the polls at the Annual Meeting. Have this proxy card in hand when you call and then follow the instructions.

<div align='center'>OR</div>

VOTE BY MAIL

Mark, sign and date your proxy card below and promptly return it in the postage-paid
envelope we have provided to: Dynavax Technologies Corporation, c/o Corporate Election Services, P.O. Box 3230, Pittsburgh, PA
15230.

<div align='center'>If you vote by Internet or by telephone, you do NOT need to mail back your proxy card.

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE ANNUAL MEETING OF STOCKHOLDERS:
THE PROXY STATEMENT AND ANNUAL REPORT ARE AVAILABLE AT WWW.VIEWOURMATERIAL.COM/DVAX</div>

| CONTROL NUMBER è |

| ê | If submitting a proxy by mail, please sign and date the GOLD proxy card below and fold and 
 detach card at perforation before mailing.                                                 | ê |

|                                                                      | DYNAVAX TECHNOLOGIES CORPORATION | GOLD PROXY CARD |
| ANNUAL MEETING OF STOCKHOLDERS                                       
 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS FOR THE  
 ANNUAL MEETING OF STOCKHOLDERS – [●], 2025 AT 7:00 A.M. PACIFIC TIME |                                  |                 |

The undersigned hereby
appoints [●], [●], and [●] and each of them the undersigned’s true and lawful attorneys and
proxies (with full power of substitution in each) to vote all Common Stock of Dynavax Technologies Corporation
(“Dynavax” or the “Company”), standing in the unders