Company: HURA
Filing Date: 2025-05-23
Form Type: 424B3
Source: 0001193125-25-125499
Chunk: 698

Company: TuHURA Biosciences, Inc./NV
Filing Date: 2025-05-23
Form: 424B3
Chunk 698
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 pursuant to the Mergers plus the amount of gain recognized (as described above, but excluding any gain attributable to cash 
 received in lieu of fractional shares), minus the sum of the cash received by such U.S. holder; and                                                                                                                                                    |

| • |     | the holding period of the shares of TuHURA Common Stock that a U.S. holder receives pursuant to the Mergers will          
 generally include the holding period of the Kineta Common Stock surrendered in exchange therefor pursuant to the Mergers. |

On the other hand, if the receipt of the Contingent Payment Rights in the Mergers is instead treated as part of a “closed transaction” (discussed below), then, subject to the discussions below regarding the receipt of cash in lieu of fractional shares, and assuming that the Mergers qualify as a “reorganization” for U.S. federal income tax purposes, the following consequences will generally result for U.S. Holders of Kineta Common Stock in connection with the Mergers:

| • |     | generally, capital gain will be recognized by a U.S. holder of Kineta Common Stock equal to the lesser of                                                                                                                                  
 (i) the sum of the cash (if any) received by such U.S. holder at the closing of the Mergers and the fair market value (as of the closing of the Mergers) of such U.S. holder’s portion of Contingent Payment Right, as determined for U.S. 
 federal income tax purposes and (ii) the difference, if any, between (x) the sum of the fair market values (as of the closing of the Mergers of the aggregate Merger Consideration received by such U.S. holder, including the Contingent  
 Payment Right, and (y) such holder’s adjusted tax basis in the Kineta Common Stock surrendered. Such gain would be long-term                                                                                                               |

466

| capital gain if such U.S. holder’s holding period for such shares of Kineta Common Stock is more than one year as of the closing date of the Mergers; unless the cash or property other than                                                      
 TuHURA stock received in the Mergers has the effect of a dividend under the provisions of Section 302 and 356 of the Code, in which case the gain will be treated as dividend income to the extent of the holder’s ratable share of any           
 earnings and profits, as calculated for U.S. federal income tax purposes. If a U.S. holder acquired