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Press release July 27, 2026

Ameren Missouri plans new energy center to deliver long-term value and around-the-clock power

Ameren Corp (AEE)

Ameren Missouri, a subsidiary of Ameren Corporation (NYSE: AEE), announced plans to build the West Alton Energy Center, a new combined-cycle natural gas facility. It is designed to provide reliable, around-the-clock baseload power for customers while keeping costs as low as possible, supporting economic development in the region and strengthening the company's balanced mix of energy. In an application filed with the Missouri Public Service Commission (MoPSC), Ameren Missouri laid out details of the proposed energy center, which will ensure grid reliability as the economy grows and other energy generation facilities reach the end of their useful lives. The plans for West Alton include generating approximately 2,100 megawatts (MW) of electricity, with an anticipated completion date of 2031, pending regulatory approval. It is expected to provide more than 1,000 construction jobs over several years. Additional details about the project are available at Ameren.com/WestAlton . "Customers
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