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Union Electric Company
Union Electric Company (Ameren Missouri) is a regulated utility serving 1.2 million electric customers in Missouri.
Union Electric Company
Union Electric Company was formed in 1937 when a group of Missouri electric utilities consolidated under a single corporate structure. The company became part of the Ameren system in 1997 through a merger with Central Illinois Public Service Company. As Ameren Missouri, it operates as a regulated subsidiary of Ameren Corporation, a publicly traded holding company listed on the NYSE under the ticker AEE. The utility owns and operates a mix of generation assets including coal-fired plants (Labadie Energy Center, Rush Island Energy Center), natural gas facilities, and a growing renewables portfolio. In 2023, Ameren Missouri committed to adding 4,800 megawatts of solar generation capacity by 2030 as part of its Integrated Resource Plan. The company's customer base spans 64 counties in Missouri, concentrated in the St. Louis metropolitan area. Capital expenditures for 2024 were budgeted at approximately $4.5 billion across the Ameren system, with a focus on grid modernization and reliability. Union Electric employs roughly 4,500 people in Missouri. The company is regulated by the Missouri Public Service Commission for its electric rates and service, and by the U.S. Nuclear Regulatory Commission for its Callaway nuclear plant (although the plant is a separate legal entity within Ameren). The utility has no wealth management or investment advisory operations. Union Electric's structural differentiator is its position as a rate-regulated utility in a holding company structure that also includes Ameren Illinois. This provides steady, predictable cash flows from regulated operations but limits profit growth to allowed returns on capital. The company does not engage in merchant power or unregulated competitive activities to any meaningful degree.
General information
Firm type
Utility
Year founded
1937
AUM
Undisclosed
Location
Region
North America
Country
United States
City
St. Louis
Corporate office
St. Louis, Missouri, United States
Principals
Warner Baxter
Chairman and CEO (Ameren Corporation, predecessor to holding company structure)
Mark Birk
President, Ameren Missouri (utility operating company)
Sector focus
Frequently asked questions
Is Union Electric Company a family office or an investment vehicle?
No. Union Electric Company is a regulated public utility operating as Ameren Missouri. It has no wealth management or investment operations. The company generates revenue through regulated electricity sales, not capital allocation for wealthy families.
Who owns Union Electric Company?
Union Electric Company is a subsidiary of Ameren Corporation, a publicly traded holding company on the NYSE under ticker AEE (per Ameren Corporation SEC filings, 2024). It is not privately owned and has no single-family office structure.
What is the generation mix of Union Electric's power plants?
Ameren Missouri's generation fleet includes coal (Labadie, Rush Island, and Thomas Hill plants), natural gas, and solar. The company has also retired some older coal units in recent years. Per its 2024 Integrated Resource Plan, it plans to add 4,800 MW of solar by 2030 (per Missouri PSC filing, December 2024).
Does Union Electric Company invest in private companies or venture capital?
No. Union Electric does not make private equity or venture capital investments. It is a regulated utility that earns returns on its capital investments for generation, transmission, and distribution infrastructure.
What is the relationship between Union Electric and Ameren?
Union Electric Company operates as Ameren Missouri, a wholly owned subsidiary of Ameren Corporation. The holding company structure was created in 1997 through a merger with Central Illinois Public Service Company, forming Ameren. Union Electric remains the legal name for regulatory purposes but does business as Ameren Missouri.
Where does Union Electric Company operate?
The company serves 64 counties in eastern and central Missouri, primarily the St. Louis metropolitan area. It operates power plants, transmission lines, and distribution infrastructure within Missouri. Its natural gas service is limited to St. Louis area customers.
What regulatory bodies oversee Union Electric Company?
The Missouri Public Service Commission regulates electric rates and service quality within Missouri. The Federal Energy Regulatory Commission oversees interstate wholesale power sales. The IRS and SEC regulate corporate structure and financial reporting.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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