An anonymous director reports

TRANSALTA TO HOST ANNUAL MEETING OF SHAREHOLDERS AND FIRST QUARTER 2025 RESULTS CONFERENCE CALL

On Thursday, April 24, 2025, TransAlta Corp. will hold its annual meeting of shareholders at 11:30 a.m. Mountain Time (1:30 p.m. Eastern Time) in a virtual-only meeting format by live audio webcast. The management proxy circular (available at the TransAlta website) provides detailed information about the business of the meeting and the voting process. TransAlta will only conduct the formal business of the meeting, and there will not be a management presentation.

First quarter 2025 conference call

TransAlta will release its first quarter 2025 results before markets open on Wednesday, May 7, 2025. A conference call and webcast to discuss the results will be held for investors, analysts, members of the media and other interested parties the same day beginning at 9 a.m. Mountain Time (11 a.m. Eastern Time).

First quarter 2025 conference call

A webcast will be available.

To listen to the conference call by telephone, please register ahead of time. Once registered, participants will have the option of: (1) dialling into the call from their phone (through a personalized PIN); or (2) clicking the call me option to receive an automated call directly to their phone.

Related materials will be available in the investor section of TransAlta's website. If you are unable to participate in the call, a replay will be accessible. A transcript of the broadcast will be posted on TransAlta's website once it becomes available.

About TransAlta Corp.

TransAlta owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the United States and Australia with a focus on long-term shareholder value. TransAlta provides municipalities, medium and large industries, businesses, and utility customers with affordable, energy-efficient and reliable power. Today, TransAlta is one of Canada's largest producers of wind power and Alberta's largest producer of thermal generation and hydroelectric power. For over 113 years, TransAlta has been a responsible operator and a proud member of the communities where it operates and where its employees work and live. TransAlta aligns its corporate goals with the UN Sustainable Development Goals and the Future-Fit Business Benchmark, which also defines sustainable goals for businesses. Its reporting on climate change management has been guided by the recommendations of the international financial reporting standards, S2 Climate-related Disclosures Standard and the Task Force on Climate-related Financial Disclosures. TransAlta has achieved a 70-per-cent reduction in greenhouse emissions or 22.7 million tonnes carbon dioxide equivalent since 2015, and received an upgraded MSCI environmental, social and goveranance rating of AA.