Company: WHWK
Filing Date: 2025-01-31
Form Type: DEFM14A
Source: 0001193125-25-018470
Chunk: 504

Company: Whitehawk Therapeutics, Inc.
Filing Date: 2025-01-31
Form: DEFM14A
Chunk 504
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various assumptions, including the expected life, expected dividend yield, price volatility and risk-free interest rate of the underlying stock. The expected volatility used in calculating the estimated fair value for purchases under the 2021 ESPP
is based on the historical volatility of the Company’s common stock.

F-27

The calculation was based on the following assumptions:

|                          |     | Year Ended December 31, 
                    2023 |     |             2022 |
|:-------------------------|:----|------------------------:|:----|-----------------:|
| Strike price (per share) |     |           $4.00 - $5.98 |     |  $11.40 - $11.66 |
| Risk-free interest rate  |     |           5.24% - 5.41% |     |    1.54% - 4.40% |
| Expected volatility      |     |        60.99% - 176.11% |     | 92.59% - 105.68% |
| Expected term (in years) |     |                     0.5 |     |              0.5 |
| Expected dividend yield  |     |                       — |     |                — |

As of December 31, 2023 and 2022, 659,146 and 492,361 shares of common stock were available for issuance under the 2021 ESPP, respectively. The Company had an outstanding liability of $0.1 million and $76,000 at December 31, 2023 and 2022, respectively, which will be recognized over six months. During the years ended December 31, 2023 and 2022, 77,565 and 27,202 shares were issued under the 2021 ESPP, respectively. 12. Income Taxes The Company recorded no income tax expense for the years ended December 31, 2023 and 2022. The Company continues to maintain a full valuation allowance. A reconciliation of the statutory federal income tax with the provision for income taxes are as follows:

|                                          |     | Year Ended December 31, |  2023 |   |     |     |  2022 |   |
|:-----------------------------------------|:----|:------------------------|------:|:--|:----|:----|------:|