An anonymous director reports

MEDIA ADVISORY: TRANSALTA ANNUAL MEETING OF SHAREHOLDERS AND FIRST QUARTER 2024 RESULTS AND CONFERENCE CALL

On Thursday, April 25, 2024, TransAlta Corp. will hold its annual meeting of shareholders at 11 a.m. Mountain Time (1 p.m. Eastern Time) in a virtual-only meeting format by live audio webcast. The management proxy circular 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 following the formal business of the meeting.

Q1 2024 earnings release, conference call and webcast

TransAlta will release its first quarter 2024 results before markets open on Friday, May 3, 2024. 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. ET). The media will be invited to ask questions following analysts.

First quarter 2024 conference call

To access the conference call by telephone, please register ahead of time on-line. Once registered, participants will have the option of: (1) dialling into the call from their phones (through a personalized PIN (personal identification number); or (2) clicking the "Call Me" option to receive an automated call directly to their phones.

Related materials will be available on the investor centre section of TransAlta's website. If you are unable to participate in the call, the replay will be accessible on-line. 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 clean, affordable, energy-efficient and reliable power. Today, TransAlta is one of Canada's largest producers of wind power and Alberta's largest producer of hydroelectric power. For over 112 years, TransAlta has been a responsible operator and a proud member of the communities where the company operates and where the company's employees work and live. TransAlta aligns its corporate goals with the United Nations Sustainable Development Goals and the Future-Fit Business Benchmark, which also defines sustainable goals for businesses. The company's reporting on climate change management has been guided by the international financial reporting standards (IFRS) S2 Climate-related Disclosures Standard and the Task Force on Climate-related Financial Disclosures (TCFD) recommendations. TransAlta has achieved a 66-per-cent reduction in GHG (greenhouse gas) emissions or 21.3 million tonnes CO2e (carbon dioxide equivalent) since 2015 and received an upgraded MSCI ESG rating of AA.