Company: HURA
Filing Date: 2025-05-23
Form Type: 424B3
Source: 0001193125-25-125499
Chunk: 863

Company: TuHURA Biosciences, Inc./NV
Filing Date: 2025-05-23
Form: 424B3
Chunk 863
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 each vesting date. Nonrecourse Promissory Notes for Stock Options Exercised In March 2021, an employee exercised 56,000 vested stock options and entered into a nonrecourse promissory note in the amount of $0.4 million with the Company. The promissory note provides for a fixed interest rate of 2.0% and payment is required upon the earlier of (i) the sale of the Company, (ii) the borrower’s sale of any of the shares, (iii) five years from the date the promissory note agreement was executed, and (iv) material breach by borrower of any written agreements with the Company, including but not limited to the employment agreement and Company policies. Payment may also be triggered in other specified circumstances. The promissory note remains outstanding as of December 31, 2024. Fair Value of Stock Options The fair value of stock options granted for employee and non-employeeawards was estimated at the grant date using the Black-Scholes option pricing model based on the following assumptions:

|                         |     | Years Ended December 31, |     |                |
|                         |     |                     2024 |     |           2023 |
| Expected volatility     |     |           121.8% -124.9% |     | 111.1% -113.1% |
| Expected term (years)   |     |                     1.00 |     |    5.35 - 6.08 |
| Risk-free interest rate |     |            4.19% - 5.07% |     |    3.4% - 4.4% |
| Expected dividend yield |     |                       0% |     |             0% |

Restricted Stock The Company has granted RSUs under its equity incentive plans with both service-based and performance-based vesting conditions. As of December 31, 2024, the Company had zero outstanding RSUs. The following table summarizes the Company’s restricted stock activity consisting of RSUs:

|                                                  |     | Number of    
 Restricted   
 Stock (RSUs) |        |   |     | Weighted-     
 Average Grant 
 Date Fair     
 Value Per     
 Share         |       |
|:-------------------------------------------------|:----|:-------------|-------:|:--|:----|:--------------|------:|
| Outstanding and unvested as of December 31, 2023 |     |              |