Company: HURA
Filing Date: 2025-05-23
Form Type: 424B3
Source: 0001193125-25-125499
Chunk: 64

Company: TuHURA Biosciences, Inc./NV
Filing Date: 2025-05-23
Form: 424B3
Chunk 64
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 the Company shall, and shall cause its Representatives to,                                                                                                                                           
 negotiate with TuHURA in good faith (to the extent TuHURA desires to negotiate) to make such adjustments in the terms and conditions of the Merger Agreement so that such Acquisition Proposal shall cease to constitute a Superior Proposal; |

| • |     | the Kineta Board of Directors makes the determination that such Acquisition Proposal (after taking into account                                          
 any adjustment to the terms and conditions of the Merger Agreement proposed by TuHURA in response to such proposal) constitutes a Superior Proposal; and |

37

| • |     | the Kineta Board of Directors concludes in good faith, after consultation with outside legal counsel, based on                                                                
 the information then available, that failing to make an Adverse Recommendation Change would violate its fiduciary duties to the Company’s stockholders under applicable laws. |

Upon any amendment to the financial terms or any other material amendment of an Acquisition Proposal, the Company shall as promptly as practicable provide a new notice to TuHURA describing such amendment and the obligations set forth in the third and fourth bullets immediately above shall continue for at least two (2) Business Days after delivery to TuHURA of such notice (and, if necessary, the Kineta Board of Directors meeting shall be postponed to accommodate such additional negotiation period). Termination of the Merger Agreement (see page 250) The Merger Agreement may be terminated and the Mergers and other transactions contemplated thereby may be abandoned by action taken or authorized by the board of directors of the terminating party at any time prior to the Effective Time or the Second Effective Time (with any termination by TuHURA also being an effective termination by Merger Subs):

| • |     | by the mutual written consent of TuHURA and Kineta; |

| • |     | by either TuHURA and Kineta if the Mergers have not been consummated by June 30, 2025 (subject to possible                                                                                                                                                
 extensions), the End Date; provided that any breach of the Merger Agreement by the terminating party has not been the primary cause of the failure of the Mergers to have occurred on or before the End Date and such action or failure to act            
 constitutes a breach of the Merger Agreement. TuHURA may, on or prior to June 30, 2025, upon written notice to Kineta, extend the End Date to no later than July 31, 2025, provided that as a condition to making such