Company: DVAX
Filing Date: 2025-04-03
Form Type: PREC14A
Source: 0000930413-25-001153
Chunk: 114

Company: DYNAVAX TECHNOLOGIES CORP
Filing Date: 2025-04-03
Form: PREC14A
Chunk 114
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 previously submitted.

If you have already voted using Deep Track’s white proxy
card or white voting instruction form, you have the right to change your vote and revoke your prior proxy by signing and dating
the enclosed GOLDproxy card or GOLDvoting instruction form and returning it in the postage-paid envelope provided
or by voting via the internet by following the instructions provided on the enclosed GOLDproxy card or GOLD voting
instruction form. Even if you would like to vote in favor of some or all of the Deep Track Nominees, we strongly recommend that
you use the Company’s GOLDproxy card or GOLDvoting instruction form to do so. Only the latest dated proxy
you submit will be counted. If you have any questions or need assistance voting, please call MacKenzie Partners, the Company’s
proxy solicitor, at 1-800-322-2885 (toll-free from the U.S. and Canada) or +1-212-929-5500 from other countries.

Can I change my vote after submitting my proxy?

Yes. You can revoke your proxy at any time before the final vote at
the Annual Meeting.

Stockholder of Record: Shares Registered in Your Name

If you are the record holder of your shares, you may revoke your proxy
in any one of the following ways:

| • | By Mail: You may complete, sign and date another proxy card with a later date and return it by mail before the Annual                       
 Meeting to Dynavax Technologies Corporation, Attention: Corporate Secretary, 2100 Powell Street, Suite 720, Emeryville, California          
 94608. If you return your signed later dated proxy card to us before the Annual Meeting, we will vote your shares as you direct on          
 that later-dated proxy card.                                                                                                                |
| • | By Internet: You may submit a later-dated vote by internet by following the instructions on your GOLD proxy card                            
 or GOLD voting instruction form and following the on-screen instructions to complete an electronic proxy card. You will be                  
 asked to provide the control number from your GOLD proxy card. Your internet vote must be received by 8:59 p.m. Pacific Time                
 on           , 2025 to be counted.                                                                                                          |
| • | By Telephone: You may submit a later-dated vote by telephone by calling the toll-free phone number on your GOLD proxy                       
 card or GOLD voting instruction form and following the recorded instructions. You will be asked to provide the control number               
 from your GOLD proxy card. Your telephone