Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 260

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 260
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 to rounding of tabulated emissions. Zeros (0.0) indicate truncated values.

| Year ended Dec. 31                                |     | 2024 |     |     | 2023 |     |     | 2022 |     |
|:--------------------------------------------------|:----|:-----|----:|:----|:-----|----:|:----|:-----|----:|
| Category 1: Purchased goods and services(1)       |     |      | 0.0 |     |      | 0.0 |     |      | 0.0 |
| Category 2: Capital goods(2)                      |     |      | 0.0 |     |      | 0.1 |     |      | 0.1 |
| Category 3: Fuel and energy-related activities(3) |     |      | 1.0 |     |      | 1.0 |     |      | 1.0 |
| Category 11: Use of sold products(4)              |     |      | 0.6 |     |      | 0.7 |     |      | 0.6 |
| Category 15: Investments(5)                       |     |      | 1.8 |     |      | 1.7 |     |      | 1.8 |
| Other relevant categories(6)                      |     |      | 0.2 |     |      | 0.3 |     |      | 0.3 |
| Total scope 3 GHG emissions                       |     |      | 3.7 |     |      | 3.7 |     |      | 3.8 |

| (1) | Category 1: Purchased goods and services includes emissions associated with the purchase of goods 
 and services described as operating expenses.                                                     |

| (2) | Category 2: Capital goods includes emissions associated with the purchase of capital goods and 
 services described as capital expenditures.                                                    |

| (3) | Category 3: Fuel and energy-related activities includes emissions associated with the extraction,                                                                                                                                                        
 production of all fuels consumed and midstream transportation of natural gas (pipeline). Excludes the emissions associated with electricity purchased from the grid as they have been accounted for in our scope 2 GHG emissions, but accounting for the 
 transmission and distribution losses.                                                                                                                                                                                                                    |

| (4) | Category 11: Use of sold products includes emissions associated