Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 116

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 116
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 on fair value less costs of disposal using a discounted cash flow approach and is categorized as a Level III fair value measurement. Wind and Solar During 2023, the Company recorded net impairment reversals of $4 million. Internal valuations indicated the fair value less costs of disposal for three wind facilities exceeded the carrying value due to changes in power price assumptions, which favourably impacted estimated future cash flows and resulted in impairment reversals of $17 million. The total recoverable amounts of $540 million was estimated based on fair value less costs of disposal using a discounted cash flow approach and is categorized as a Level III fair value measurement. Also in 2023, two wind facilities were impaired, primarily due to unfavourable power price assumptions and changes in estimated future cash flows, resulting in a $13 million impairment charge. The recoverable amounts of $130 million for these two assets were estimated based on fair value less costs of disposal using a discounted cash flow approach and are categorized as a Level III fair value measurement. During 2022, the Company recorded net impairment charges of $43 million on five wind facilities and one solar facility as a result of changes in key assumptions, that included significant increases in discount rates, changes in pricing and changes in estimated future cash flows. The recoverable amounts of $754 million for these six assets were estimated based on fair value less costs of disposal using a discounted cash flow approach and categorized as a Level III fair value measurement.

| F37 |     | TransAlta Corporation |     | 2024 Integrated Report |

Notes to the Consolidated Financial Statements 8. Net Other Operating Income Net other operating income includes the following:

| Year ended Dec. 31             |     | 2024 |   |     | 2023 |   |     | 2022 |   |
|:-------------------------------|:----|:-----|:--|:----|:-----|:--|:----|:-----|:--|
| Alberta                        
 Off-Coal Agreements            |     | (40  | ) |     | (40  | ) |     | (40  | ) |
| Liquidated damages recoverable |     | (10  | ) |     | (6   | ) |     | (12  | ) |
| Other                          |     | (9   | ) |     | (1   | ) |     | (6   | ) |
| Net other                      
 operating income               |     | (59  | ) |     | (47