Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 139

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 139
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             | — |
| Forward starting interest 
 rate swaps                |     |             |   53 |   |     | Interest expense   |     |              |   2 |   |     | Interest expense        |     |             | — |
| OCI impact                |     |             | (694 | ) |     | OCI impact         |     |              | 126 |   |     | Net earnings impact     |     |             | — |

II. Effect of Non-Hedges For the year ended Dec. 31, 2024, the Company recognized a net unrealized loss of $7 million (2023 — loss of $44 million, 2022 — loss of $384 million) related to commodity derivatives. For the year ended Dec. 31, 2024, a loss of $63 million (2023 — gain of $11 million, 2022 — gain of $20 million) related to foreign exchange and other derivatives was recognized, which consists of net unrealized losses of $36 million (2023 — gain of $27 million, 2022 — loss of $11 million) and net realized losses of $27 million (2023 — loss of $16 million, 2022 — gains of $31 million), respectively.

| TransAlta Corporation |     | 2024 Integrated Report |     | F66 |

Notes to the Consolidated Financial Statements F. Collateral I. Financial Assets Provided as Collateral At Dec. 31, 2024, the Company provided $124 million (Dec. 31, 2023 — $145 million) in cash and cash equivalents as collateral to regulated clearing agents as security for commodity trading activities. These funds are held in segregated accounts by the clearing agents. Collateral provided is included within trade and other receivables in the Consolidated Statements of Financial Position. At Dec. 31, 2024, the Company provided $21 million (Dec. 31, 2023 — $19 million) in surety bonds as security for commodity trading activities. II. Financial Assets Held as Collateral At Dec. 31, 2024, the Company held $9 million (Dec. 31, 2023 — $9 million) in cash collateral associated with counterparty obligations. Under the terms of the contracts, the Company may be obligated to pay interest on the outstanding balances and to return the principal when the counterparties have met their contractual obligations or when the amount of the obligation declines as a result of