Company: TSLTF
Filing Date: 2025-12-09
Form Type: F-10EF
Source: 0001193125-25-312047
Chunk: 36

Company: TRANSALTA CORP
Filing Date: 2025-12-09
Form: F-10EF
Chunk 36
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 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Calgary, Province of Alberta, Canada, on this 9 thday of December, 2025.

| TRANSALTA CORPORATION 
 (Registrant)          |     |                   |     |                                                      |
| By:                   |     | /s/ Nancy Brennan |     |                                                      |
|                       |     | Name:             |     | Nancy Brennan                                        |
|                       |     | Title:            |     | Executive Vice President, Legal and External Affairs |

III-2

POWER OF ATTORNEY Each person whose signature appears below constitutes and appoints each of John Kousinioris and Nancy Brennan, his/her true and lawful attorney-in-factand agent, each acting alone, with full power of substitution and resubstitution, for him/her, in his/her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) and supplements to this registration statement, and to file the same, with all exhibits hereto, and other documents in connection therewith, with the Commission, granting unto said attorneys-in-factand agents, each acting alone, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as full to all intents and purposes as they might or could do themselves, hereby ratifying and confirming all that said attorneys-in-factand agents or any of them acting alone, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof. This Power of Attorney may be executed in multiple counterparts, each of which shall be deemed an original, but which taken together shall constitute one instrument. Pursuant to the requirements of the Securities Act, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

| Signature                
 /s/ John Kousinioris     
 John Kousinioris         
 /s/ Joel Hunter          
 Joel Hunter              |     | Title                                                                                                                        
 President, Chief Executive Officer and Director (Principal Executive Officer)                                                
 Executive Vice President, Finance and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) |     | Date             
 December 9, 2025 
 December 9, 2025 |
|:-------------------------|:----|:-----------------------------------------------------------------------------------------------------------------------------|:----|:-----------------|
| /s/ John P. Dielwart     
 John P. Dielwart         |     |