An anonymous director reports

DEPARTMENT OF ENERGY MANDATES CENTRALIA UNIT 2 REMAIN AVAILABLE FOR OPERATION FOR 90 DAYS

TransAlta Corp.'s subsidiary, TransAlta Centralia Generation LLC, has received an order from the U.S. Department of Energy. The order mandates that Centralia Unit 2 in Washington State remain available for operation, for a period of 90 days, until March 16, 2026.

TransAlta is currently evaluating the order, and will work with the state and federal governments in relation thereto. Further information regarding the order will be provided as it becomes available in due course.

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 114 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 United Nations 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 international financial reporting standards, S2 Climate-related Disclosures Standard and the Task Force on Climate-related Financial Disclosures recommendations. TransAlta has achieved a 70-per-cent reduction in greenhouse gas emissions or 22.7 million tonnes carbon dioxide equivalent since 2015 and received an upgraded MSCI environmental, social and governance rating of AA.

We seek Safe Harbor.