Company: HURA
Filing Date: 2025-05-23
Form Type: 424B3
Source: 0001193125-25-125499
Chunk: 288

Company: TuHURA Biosciences, Inc./NV
Filing Date: 2025-05-23
Form: 424B3
Chunk 288
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5.3% of the total outstanding shares of TuHURA Common Stock. As described in this joint proxy statement/prospectus, all of the directors and certain officers of TuHURA entered into support agreements with TuHURA and Kineta whereby such stockholders agreed to vote all of their shares of TuHURA Common Stock in favor of approving the Authorized Share Increase Proposal and the TuHURA Adjournment Proposal. Methods of Voting If you are a stockholder of record, you may vote by proxy through the Internet, by telephone or by mail, or by voting at the TuHURA special meeting via the TuHURA special meeting website. For shares held through a bank, broker or other nominee in “street name” instead of as a registered holder, you may vote by submitting your voting instructions to your bank, broker or other nominee. In most instances, you will be able to do this over the Internet, by telephone or by mail as indicated below. Please refer to the information from your bank, broker or other nominee on how to submit voting instructions. If you do not provide voting instructions to your bank, 178

broker or other nominee, your shares of TuHURA Common Stock will not be voted on any proposal as your bank, broker or other nominee does not have discretionary authority to vote on any of the proposals to be voted on at the TuHURA special meeting; see the section entitled “The TuHURA special meeting—Quorum; Abstentions and Broker Non-Votes”.

| • |     | By the Internet: If you are a stockholder of record, you can vote at www.voteproxy.com and follow the                                                                                                   
 instructions, 24 hours a day, seven days a week. You will need the 16-digit control number included on your proxy card or your paper voting instruction form (if you received a paper copy of the proxy 
 materials).                                                                                                                                                                                             |

| • |     | By Telephone: If you are a stockholder of record, you can vote using a touch-tone telephone by calling                                                                                                     
 1-800-PROXIES and follow the recorded instructions, 24 hours a day, seven days a week. You will need the 16-digit control number included on your proxy card or your paper voting instruction form (if you 
 received a paper copy of the proxy materials).                                                                                                                                                             |

| • |     | By Mail: If you have received a paper copy of the proxy materials by mail, you may complete, sign, date                                                              
 and