Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 14

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 14
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| (3) | The large majority of the Corporation’s contracted operating facilities benefit from inflation adjustment 
 provisions that apply to all or a portion of our revenues under such contracts.                           |

| (4) | Where no contract expiry date is indicated, the facility operates as merchant. |

| (5) | These facilities form part of the hydro assets that are subject to the Investment Agreement (as defined herein).               
 See the “Capital and Loan Structure – Exchangeable Securities – Investment Agreement” section of this AIF for further details. |

| (6) | These facilities are EcoLogo® certified. EcoLogo certification is granted to products with an environmental 
 performance that meets or exceeds all government, industrial safety and performance standards.              |

S-7

Wind and Solar Segment As at September 30, 2025, the Wind and Solar segment held interests in approximately 2,559 MW of net wind and solar generating capacity. This capacity consists of twelve wind facilities in Western Canada, four in Ontario, two in Québec, three in New Brunswick and eight in the United States, more specifically in the states of Washington, Wyoming, Minnesota, Oklahoma, Pennsylvania and New Hampshire. The Corporation also holds a 10 MW utility-scale battery energy storage system in Alberta, 143 MW of solar facilities in the states of Massachusetts and North Carolina, and a 38 MW solar facility and a 10 MW battery energy storage system in Western Australia. In addition to contracting for the sale of the power generation, we also enter into long-term and short-term contracts to sell the environmental attributes from the merchant wind and solar facilities. Generally, for facilities under a long-term power purchase agreement, the purchaser under such long-term contracts also benefits from any environmental attributes associated with the facility. The following table summarizes our Wind and Solar generation facilities as at September 30, 2025:

| Facility Name                   |     | Province/ 
 State     |     | Nameplate 
  Capacity 
   (MW)(1) |     | Consolidated 
 Interest     |     |  Gross Installed 
 Capacity (MW)(1) |     | Ownership |     |       Net Capacity 
 Ownership Interest 
            (MW)(1) |     |        Commercial 
 Operation Date(2) |     | Revenue   
 Source(3) |     | Contract Expiry 
         Date(4) |
| Alberta Wind                    |     |           |     |           |     |              |     |                  |     |           |     |                    |     |                   |     |