TransAlta Provides Notice to Mothball Sheerness Unit 1

Core Viewpoint - TransAlta Corporation's subsidiary, Alberta Power (2000) Ltd., announced the temporary mothballing of Sheerness Unit 1 effective April 1, 2026, for up to two years, while maintaining the option to return it to service based on market conditions [1][2]. Group 1: Company Actions - The decision to mothball Sheerness Unit 1 is described as a prudent financial move to preserve future economic opportunities [2]. - Sheerness Unit 1 will remain operational through the winter season, while Sheerness Unit 2 will continue to operate fully [1]. Group 2: Company Overview - TransAlta operates a diverse range of electrical power generation assets across Canada, the U.S., and Australia, focusing on long-term shareholder value [3]. - The company is a significant producer of wind power in Canada and the largest producer of thermal generation and hydroelectric power in Alberta [3]. - TransAlta has achieved a 70% reduction in greenhouse gas emissions, equating to 22.7 million tonnes of CO2e since 2015, and has received an upgraded MSCI ESG rating of AA [3].