Ameren Corporation (NYSE: AEE) is an integrated energy company headquartered in St. Louis, Missouri, that provides electric and natural gas delivery and related services in portions of Missouri and Illinois. The company operates regulated utility businesses that serve a broad mix of residential, commercial and industrial customers, and it participates in wholesale energy markets and transmission operations that support reliable service across its service territories.
Ameren’s core activities include generation, transmission and distribution of electricity, distribution of natural gas, and the provision of customer energy solutions such as demand-side management and energy efficiency programs. The company’s operations include utility subsidiaries that manage local distribution networks, grid infrastructure investments to enhance reliability and resiliency, and a portfolio of generation assets that includes conventional and low‑carbon resources as part of its overall supply mix.
Formed through the combination of regional utility interests in the late 1990s, Ameren has grown as a regional energy provider focused on serving Midwestern communities. Its regulated utilities operate under state regulatory oversight, which shapes rates, infrastructure investment and service obligations. In recent years the company has emphasized grid modernization, integration of renewable resources, and initiatives intended to reduce emissions and support customer access to cleaner energy options.
Ameren is governed by a board of directors and an executive management team that work with state regulators, customers and community stakeholders to align operational objectives and investment plans. The company’s activities span regulated utility operations, infrastructure development and customer-facing energy programs designed to maintain reliable service while advancing modernization and environmental goals within its Missouri and Illinois service areas.