Ameren is a utility company based in the United States that provides electricity and natural gas services. It primarily operates in the states of Illinois and Missouri, serving millions of customers. The company focuses on delivering reliable energy while investing in infrastructure and renewable energy sources. Founded in 1881, Ameren has grown through various mergers and acquisitions. It is committed to sustainability and reducing carbon emissions, aiming to transition to cleaner energy solutions. The company also engages in community initiatives and programs to support energy efficiency and customer assistance.