Company: WHWK
Filing Date: 2025-03-31
Form Type: S-3
Source: 0001193125-25-068942
Chunk: 33

Company: Whitehawk Therapeutics, Inc.
Filing Date: 2025-03-31
Form: S-3
Chunk 33
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 2025.

| WHITEHAWK THERAPEUTICS, INC. |     |                                       |
| By:                          |     | /s/ David J. Lennon                   |
|                              |     | David J. Lennon, Ph.D.                |
|                              |     | President and Chief Executive Officer |

Power of Attorney KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints David J. Lennon, Ph.D. and Scott Giacobello, and each of them acting individually, as his or her true and lawful attorneys-in-factand agent, with full power of each to act alone, with full powers of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this registration statement (including post-effective amendments and any related registration statements filed pursuant to Rule 462 and otherwise), and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-factand agents, and full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully for all intents and purposes as he or she might or could do in person, hereby ratifying and confirming that all said attorneys-in-factand agents, or any of them or their substitute or resubstitute, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

| Signature               
 /s/ David J. Lennon     
 David J. Lennon, Ph.D.  
 /s/ Scott Giacobello    
 Scott Giacobello        |     | Title                                                                
 President, Chief Executive Officer and Director (Principal Executive 
 Officer)                                                             
 Chief Financial Officer                                              
 (Principal Financial and Accounting Officer)                         |     | Date           
 March 31, 2025 
 March 31, 2025 |
|:------------------------|:----|:---------------------------------------------------------------------|:----|:---------------|
| /s/ Caley Castelein     
 Caley Castelein, M.D.   |     | Chair of the Board of Directors                                      |     | March 31, 2025 |
| /s/ Behzad Aghazadeh    
 Behzad Aghaz