Union Electric Co

Union Electric Company, doing business as Ameren Missouri, is a Missouri-based rate-regulated public utility and a principal subsidiary of Ameren Corporation, one of the largest electric and gas utility holding companies in the United States. The company is engaged in the generation, transmission, distribution, and sale of electric energy across Missouri and Illinois, operating a diversified generation fleet that utilizes coal, nuclear fuel, and natural gas as primary fuel sources, supplemented by hydroelectric and renewable energy generation resources. In addition to its electric operations, Union Electric conducts regulated natural gas transmission and distribution activities, providing gas service to customers through an extensive pipeline distribution system in its service territory in Missouri.<br><br>The company has a long operational history as a foundational utility serving the St. Louis metropolitan area and broader Missouri region, providing the reliable electric and gas service that supports residential customers, commercial enterprises, and industrial operations in one of the Midwest's most economically significant metropolitan markets. As a regulated utility, Union Electric's rates, return on equity, capital investments, and service standards are subject to regulation by the Missouri Public Service Commission, which oversees the rates and service quality of investor-owned electric and gas utilities operating in the state. The regulatory compact — under which utilities accept rate of return regulation in exchange for an exclusive service territory franchise obligation to serve all customers within their territory — provides Union Electric with revenue stability while imposing obligations of universal service, infrastructure investment, and regulatory compliance that define the operations of investor-owned public utilities.<br><br>Union Electric Company's preferred stock outstanding trades on the OTC market, with the company having issued multiple series of perpetual preferred stock including its 4.56% preferred series, providing institutional holders of these fixed-income equity instruments with a vehicle for trading their holdings through the OTC market platform. The company files periodic reports and Schedule 13G beneficial ownership filings with the Securities and Exchange Commission in connection with its registered preferred stock classes, maintaining the public disclosure obligations applicable to a company with registered equity securities under the Securities Exchange Act of 1934. As Ameren Missouri, Union Electric participates in the ongoing transformation of the electric utility industry — investing in grid modernization, renewable energy capacity additions, and clean energy transition infrastructure to serve customers and meet evolving state and federal energy policy requirements.