Private company
Ameren Missouri
Former American electric power utility
The Union Electric Company of Missouri (formerly NYSE: UEP) was an electric power utility that was organized in 1902 and grew to be one of the large U.S. companies listed among the S&P 500. In 1997, its holding company merged with a smaller neighboring utility, Central Illinois Public Service Company through its holding company, CIPSCO Inc.2 It is part of North American Company.1 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
- Industryenergy supply1
- HeadquartersSt. Louis1
- Websitewww.ameren.com/missouri
- Legal formFor-Profit Corporation3
- LEIQMPJLLDULY5C1M8PNY213
- StatusActive3
- LEI statusIssued and current3
- Registered addressC/O C T CORPORATION SYSTEM, 63129-4275 Saint Louis, United States3
- Registered withCorporations Unit, Business Services (Office of the Secretary of State), 000404413
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The Union Electric Company of Missouri (formerly NYSE: UEP) was an electric power utility that was organized in 1902 and grew to be one of the large U.S. companies listed among the S&P 500. In 1997, its holding company merged with a smaller neighboring utility, Central Illinois Public Service Company through its holding company, CIPSCO Inc.2
Corporate structure
Ameren Missouri is part of a group headed by Ameren. 22 entities, 2 countries on record. Switch between the flow chart and the network, and select any entity to see its details.
- Ameren Saint Louis, Missouri, United States
- Ameren Illinois Co Collinsville, Illinois, United States
- Ameren Missouri Saint Louis, Missouri, United States
- Union Electric Power Company Subsidiary · United States
- Ameren Accelerator Investments, LLC Subsidiary · Delaware, United States
- Ameren Development Company Subsidiary · Missouri, United States
- Ameren EIP Investment, LLC Subsidiary · Delaware, United States
- Ameren Illinois Company (d/b/a Ameren Illinois) Subsidiary · Illinois, United States
- Ameren Missouri Securitization Funding I, LLC Subsidiary · Delaware, United States
- Ameren Services Company Subsidiary · Missouri, United States
- Ameren Transmission Company of Illinois Subsidiary · Illinois, United States
- Ameren Transmission Company, LLC Subsidiary · Delaware, United States
- AmerenEnergy Medina Valley Cogen, L.L.C. Subsidiary · Illinois, United States
- ATX East, LLC Subsidiary · Delaware, United States
- ATX Southwest, LLC Subsidiary · Delaware, United States
- ATX-TIP Holdings, Inc. Subsidiary · Ontario, Canada
- Lucky Corridor, LLC Subsidiary · Colorado, United States
- Missouri Central Railroad Company Subsidiary · Delaware, United States
- QST Enterprises Inc. Subsidiary · Illinois, United States
- STARS Alliance, LLC (25% interest) Subsidiary · Delaware, United States
- Transmission Infrastructure Partnerships Ltd (50% interest) Subsidiary · Ontario, Canada
- Union Electric Company (d/b/a Ameren Missouri) Subsidiary · Missouri, United States
Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.
Products and brands
- electricity
- natural gas
- steam
Listed on Wikidata.1
Subsidiaries and ownership
Parent company
Subsidiaries
- Union Electric Power Company since Aug 31, 1955
From Wikidata.1
Acquisitions
- Aug 31, 1955Acquired Union Electric Power Company1
Former names
Timeline
Links
- Websitewww.amerenmissouri.com1
- Websitewww.ameren.com/missouri1
- WikipediaUnion Electric Company
- WikidataQ7885672
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1WikidataAmeren Missouri on Wikidata
- 2WikipediaAmeren Missouri on Wikipedia
- 3