Company: HURA
Filing Date: 2025-05-23
Form Type: 424B3
Source: 0001193125-25-125499
Chunk: 1001

Company: TuHURA Biosciences, Inc./NV
Filing Date: 2025-05-23
Form: 424B3
Chunk 1001
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 Plan will be interpreted in such manner as to be
effective and valid under applicable law, but if any provision of this Plan is held to be prohibited by or invalid under applicable law, such provision will be ineffective only to the extent of such prohibition or invalidity, without invalidating
the remainder of this Plan.

15. . For United States federal and applicable state and local income tax purposes, it is
intended by the parties hereto that the Conversion qualify as a “reorganization” within the meaning of Section 368(a)(1)(F) of the U.S. Internal Revenue Code of 1986, as amended (the “Code”), and that this Plan
constitute a “plan of reorganization” for purposes of Sections 354, 361 and 368 of the Code within the meaning of Treasury Regulations Sections 1.368-2(g) and
1.368-3.

[Remainder of Page Intentionally Blank; Signature Page Follows]

D-4

IN WITNESS WHEREOF, TuHURA Nevada has caused this Plan to be executed as of the day and year first above written.

|     |     | TuHURA Biosciences, Inc. |
| By: |     |                          |
|     |     | Name:                    |
|     |     | Title:                   |

D-5

Exhibit A

Certificate of Incorporation

(See attached)

D-6

Exhibit B

Bylaws

(See attached)

D-7

ANNEX E: NEVADA ARTICLES OF CONVERSION

| FRANCISCO V. AGUILAR Secretary of                 
 State 401 North Carson Street Carson City, Nevada 
 89701-4201 (775) 684-5708                         
 Website: www.nvsos.gov                            
 www.nvsilverflume.gov                             |     | ABOVE SPACE IS FOR OFFICE USE ONLY |

Articles of Conversion/Exchange/Merger NRS 92A.200 and 92A.205 This filing completes the following: ☒ Conversion ☐ Exchange ☐ Merger TYPE OR PRINT - USE DARK INK ONLY - DO NOT HIGHLIGHT

| 1. Entity Information:                                                                      
 (Constituent, Acquired or Merging)                                                          |     |                                                                                                                                                                                                                                               | Entity Name:                                                                                                                                                                                                       |     |          |     |               |     |             |
|                                                                                             |     | TuHURA Biosciences, Inc.                                                                                                                                                                                                                      |                                                                                                                                                                                                                    |     |