Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 157

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 157
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isable by all shareholders except those held by the acquiring shareholder. Each right will entitle a shareholder, other than the acquiring shareholder, to purchase additional common shares at a significant discount to market, thus exposing the person acquiring 20 per cent or more of the shares to substantial dilution of their holdings. D. Earnings per Share

| Year ended                                                       
 Dec. 31                                                          |     | 2024 |     | 2023 |     | 2022 |
|:-----------------------------------------------------------------|:----|-----:|:----|-----:|:----|-----:|
| Net earnings attributable to common shareholders                 |     |  177 |     |  644 |     |    4 |
| Basic and diluted weighted average number of common shares       
 outstanding (millions)                                           |     |  302 |     |  276 |     |  271 |
| Net earnings                                                     
 per share attributable to common shareholders, basic and diluted |     | 0.59 |     | 2.33 |     | 0.01 |

E. Dividends On Dec. 9, 2024, the Company declared a quarterly dividend of $0.06 per common share, payable on April 1, 2025. On Feb. 19, 2025, the Company declared a quarterly dividend of $0.065 per common share, payable on July 1, 2025. There have been no transactions involving common shares between the reporting date and the date of completion of these Consolidated Financial Statements.

| F83 |     | TransAlta Corporation |     | 2024 Integrated Report |

Notes to the Consolidated Financial Statements 29. Preferred Shares A. Issued and Outstanding All preferred shares issued and outstanding are non-votingcumulative redeemable fixed or floating rate first preferred shares.

| As at Dec.                 
 31                         |     |            | 2024 |     |        |     |     |            | 2023 |     |        |     |
|:---------------------------|:----|:-----------|-----:|:----|:-------|----:|:----|:-----------|-----:|:----|:-------|----:|
| Series(1)                  |     | Number     
 of shares  
 (millions) |      |     | Amount |     |     | Number     
 of shares  
 (millions) |      |     | Amount |     |
| Series A                   |     |            |