Company: WHWK
Filing Date: 2025-01-21
Form Type: PREM14A
Source: 0001193125-25-009599
Chunk: 506

Company: Whitehawk Therapeutics, Inc.
Filing Date: 2025-01-21
Form: PREM14A
Chunk 506
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 stock units, which is expected to be recognized over a weighted average period of nine months. Compensation Expense Summary The Company recognized the following compensation cost related to employee and non-employeeshare-based compensation activity for the periods presented (in thousands):

|                                     |     | Year Ended December 31, |   2023 |     |   |  2022 |
|:------------------------------------|:----|:------------------------|-------:|:----|:--|------:|
| Selling, general and administrative |     | $                       |  7,450 |     | $ | 6,333 |
| Research and development            |     |                         |  4,504 |     |   | 3,310 |
| Total                               |     | $                       | 11,954 |     | $ | 9,643 |

The Company uses the Black-Scholes option pricing model to determine the estimated fair value for share-based option awards. Option pricing and models require the input of various assumptions, including the option’s expected life, expected dividend yield, price volatility and risk-free interest rate of the underlying stock. Forfeitures are recognized and accounted for as they occur. The calculation was based on the following assumptions:

|                                                    |     | Year Ended December 31, 
                    2023 |     |            2022 |
|:---------------------------------------------------|:----|------------------------:|:----|----------------:|
| Weighted average grant date fair value (per share) |     |                   $6.83 |     |          $12.20 |
| Risk-free interest rate                            |     |           3.42% - 4.67% |     |   1.46% - 4.23% |
| Expected volatility                                |     |        89.94% - 101.49% |     | 85.91% - 89.35% |
| Expected term (in years)                           |     |               5.2 - 6.1 |     |       5.5 - 6.1 |
| Expected dividend yield                            |     |                       — |     |               — |

The Company determines the assumptions used in the option pricing model in the following manner: Risk-Free Interest Rate –For the determination of the risk-free interest rates, the Company utilizes the U.S. Treasury yield curve for instruments in effect at the time of