Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 362

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 362
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 installed capacity for consolidated reporting is based on a proportionate interest held in a 
 facility.                                                                                          |

| (2) | Excludes the gross installed capacity attributable to the Required Divestitures. |

| (3) | Includes the Centralia coal facility and the Skookumchuck hydro facility. |

Contracted Capacity The following table provides our contracted capacity by segment in MW and as a percentage of total gross installed capacity of our facilities across the regions in which we operate as of Sept. 30, 2025:

| As at Sept. 30, 2025                             |     | Hydro |    |     | Wind & 
 Solar  |       |     | Gas(1) |     |     Energy 
 Transition |     | Total |
| Alberta                                          |     |       |  — |     |        |   336 |     |    887 |     |          — |     | 1,223 |
| Canada, excluding Alberta                        |     |       | 88 |     |        |   751 |     |    705 |     |          — |     | 1,544 |
| U.S.                                             |     |       |  — |     |        | 1,024 |     |     29 |     |        301 |     | 1,354 |
| Western Australia                                |     |       |  — |     |        |    48 |     |    450 |     |          — |     |   498 |
| Total contracted capacity (MW)                   |     |       | 88 |     |        | 2,159 |     |  2,071 |     |        301 |     | 4,619 |
| Contracted capacity as a % of total capacity (%) |     |       | 10 |     |        |    83 |     |     43 |     |         45 |     |    51 |

| (1) | The figures exclude the contracted capacity related to the Required Divestitures. |

Approximately 51 per cent of our total installed capacity is contracted with creditworthy counterparties. The following table provides the weighted average contract life by segment of our contracted capacity across the regions in which we operate as of Sept. 30, 2025:

| As at Sept. 30, 2025                         |     | Hydro |    |     | Wind & 
 Solar  |    |     | Gas(1) |     |     Energy