Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 285

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 285
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 operate. We delivered open houses, hosted community barbecues, conducted ongoing engagement with environmental, recreation and civil society groups and made numerous visits and interacted with non-profitorganizations. Community Investments In 2024, TransAlta contributed approximately $2.9 million in donations and sponsorships (2023 – $3.2 million), with a continued focus in three priority areas: youth and education, environmental leadership and community health and wellness. One of our significant community investments each year is to United Way campaigns. This year, TransAlta employees, retirees, contractors and the Company raised over $1.3 million for the United Way of Calgary and Area. In 2024, TransAlta made a number of other significant investments, including the following highlights:

| • |     | Community Health and Wellness – In 2024, TransAlta donated to the Goldfields Women’s                                                                                                          
 Refuge Finlayson House in Australia, which offers a safe haven for women and children escaping domestic violence, providing them with shelter, support, and the tools to rebuild their lives. |

| • |     | Environmental Leadership – In 2024, TransAlta donated to the Day on the Creek event as part                                
 of our commitment to supporting youth education and environmental stewardship in the Waterton Biosphere Region in Alberta. |

Our contribution helps provide valuable educational opportunities for students and the community, fostering a deeper understanding of watershed stewardship and the importance of preserving our natural environment.

| • |     | Youth and Education – In 2012, students from a kindergarten class were awarded a $2,500                                                                                                                    
 college scholarship by TransAlta after winning a regional eco-challenge competition. In 2024, 19 students of the kindergarten class reached their high school graduation. As of their graduation date, the 
 initial principal of the scholarship more than doubled. A celebration for the students and their families was held at the Centralia facility.                                                              |

Case Study: TransAlta’s Donation to the Alberta Conservation Association In 2024, TransAlta and the Alberta Conservation Association (ACA) celebrated a significant milestone at the Whitewood Mine location. Through our partnership, TransAlta completed a donation of 1,274 acres to the ACA. This donation will ensure that the land remains preserved in its natural state, contributing to biodiversity and conservation efforts. The Whitewood Mine, formerly a coal mine in Parkland County, Alberta required reclamation and conservation efforts to transform it into a sustainable natural habitat. The challenge was to preserve the