Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 351

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 351
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 consolidated statements of financial position. III. Contingent Features in Derivative Instruments Collateral is posted in the normal course of business based on the Company’s senior unsecured credit rating as determined by certain major credit rating agencies. Certain of the Company’s derivative instruments contain financial assurance provisions that require collateral to be posted only if a material adverse credit-related event occurs. At Sept. 30, 2025, the Company had posted collateral of $338 million (Dec. 31, 2024 — $424 million) in the form of letters of credit on physical and financial derivative transactions in a net liability position. Certain derivative agreements contain credit-risk-contingent features, which if triggered could result in the Company having to post an additional $108 million (Dec. 31, 2024 — $128 million) of collateral to its counterparties. 13. Property, Plant and Equipment During the three and nine months ended Sept. 30, 2025, the Company had additions to property, plant, and equipment (PP&E) of $53 million and $158 million, respectively, mainly related to major maintenance for our Canadian facilities in the Gas segment due to timing of spend, the addition of maintenance for the gas facilities acquired from Heartland and spend to support dam safety at Hydro facilities in Alberta. Additions also included a network upgrade project in Australia and major maintenance in the Wind and Solar segment. During the three and nine months ended Sept. 30, 2024, the Company had additions to PP&E of $74 million and $200 million, respectively, mainly related to assets under construction for the White Rock and the Horizon Hill wind projects, which were commissioned in the first and second quarters of 2024, and planned major maintenance. During the three and nine months ended Sept. 30, 2025, the Company did not capitalize any interest to PP&E. During the three and nine months ended Sept. 30, 2024, the Company capitalized interest of nil and $16 million, respectively, to PP&E at a weighted average rate of 6.5 per cent.

| F26 |     | TransAlta Corporation |

14. Assets and Liabilities Held for Sale On Aug. 1, 2025, the Company completed the sale of its 100 per cent interest in the 48 MW Poplar Hill facility and the assets and liabilities were removed from Assets and Liabilities Held for Sale. Subsequent to quarter end, on Oct. 2, 2025, the Company