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Ameren owns rate-regulated generation, transmission, and distribution networks that deliver electricity and natural gas through the company's two main subsidiaries, Ameren Missouri and Ameren Illinois. It serves 2.5 million electricity customers and 900,000 natural gas customers across its two service territories.

Iberdrola SA, operating under the ticker IBE, is a multinational electric utility company primarily engaged in the production, distribution, and trading of electricity. The company operates across various sectors including renewable energy, networks, and liberalized markets, focusing on sustainable energy projects. Founded in 1992 and headquartered in Bilbao, Spain, Iberdrola has grown to be a leader in renewable energy, advocating for cleaner energy solutions worldwide.