Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 303

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 303
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 the event of an unforeseen failure;                                                                |

| • |     | Selecting and applying proven technology in our generating facilities, where practical; |

| • |     | Where technology is newer, ensuring service agreements with equipment suppliers include appropriate 
 availability and performance guarantees;                                                            |

| • |     | Monitoring our fleet against industry performance to identify issues or advancements that may 
 impact performance and adjusting our maintenance and investment programs accordingly;         |

| • |     | Negotiating strategic supply agreements with selected vendors to ensure key components are readily 
 available in the event of a significant outage;                                                    |

| • |     | Monitoring the condition of our assets and performing predictive analytics, and adjusting our 
 maintenance programs to maintain availability;                                                |

| • |     | Entering into long-term arrangements with our strategic supply partners to ensure availability of 
 critical spare parts; and                                                                         |

| • |     | Implementing long-term asset management strategies that optimize the life cycles of our existing 
 facilities and/ or identify replacement requirements for generating assets.                      |

Unexpected changes in the cost of maintenance or in the cost and durability of components for the Company’s facilities may adversely affect the results of our operations. Inflation or other increases in the Company’s cost structure that are beyond the control of the Company could materially adversely impact our financial performance. Examples of such costs include, but are not limited to, unexpected increases in the cost of procuring materials and services required for

| TransAlta Corporation |     | 2024 Integrated Report |     | M137 |

Management’s Discussion and Analysis maintenance activities, and unexpected replacement or repair costs associated with equipment underperformance or lower-than-anticipated durability. Changes in the price of electricity may materially adversely affect our business. A portion of our revenues are tied, either directly or indirectly, to the market price for electricity in the markets in which we operate, and in particular in the Alberta electricity market. Market electricity prices are impacted by a number of factors, including the strength of the economy, the available transmission capacity, the price of fuel that is used to generate electricity (and, accordingly, certain of the factors that affect the price of fuel described below), the management of generation, the amount of excess generating capacity relative to load in a particular market, the cost of controlling emissions and cost of carbon, the structure of the particular market, the availability of transmission (including from other jurisdictions), increased adoption of energy-efficiency and conservation initiatives, and weather conditions that impact electrical load. As a result, we cannot precisely predict future electricity prices and