AMEREN CORP
Ameren Corporation is an American power company created December 31, 1997, by the merger of Union Electric Company (formerly NYSE: UEP) of St. Louis, Missouri and the neighboring Central Illinois Public Service Company (CIPSCO Inc. holding, formerly NYSE: CIP) of Springfield, Illinois. It is now a holding company for several power companies and energy companies. The company is based in St. Louis, with 2.4 million electric, and 900,000 natural gas customers across 64,000 square miles in central and eastern Missouri and the southern four-fifths of Illinois by area.
Basic company information
Each field links to its source. Financial figures retain their reporting periods; background references are identified in the source list.
- Ticker / security symbols
- AEE [1]
- Listing exchanges
- NYSE [1]
- SEC industry
- Electric & Other Services Combined [1]
- Business sectors
- public utility; energy industry; electric power industry [2]
- Company / filing name
- AMEREN CORP [1]
- Headquarters location
- St. Louis [2]
- Business address
- 1901 CHOUTEAU AVE, MC 1310, ST LOUIS, MO, 63166-6149 [1]
- Founded
- 1997 [2]
- Incorporation jurisdiction
- Missouri, United States [1]
- Official website
- https://www.ameren.com/; https://www.amereninvestors.com/ [2]
- Fiscal year end
- December 31 (SEC record) [1]
- ISIN (reported securities)
- US0236081024 [2]
- CIK
- 0001002910 [1]
- SIC code
- 4931 [1]
- Country in background record
- United States [2]
Company positioning and business
Ameren Corporation is an American power company created December 31, 1997, by the merger of Union Electric Company (formerly NYSE: UEP) of St. Louis, Missouri and the neighboring Central Illinois Public Service Company (CIPSCO Inc. holding, formerly NYSE: CIP) of Springfield, Illinois. It is now a holding company for several power companies and energy companies. The company is based in St. Louis, with 2.4 million electric, and 900,000 natural gas customers across 64,000 square miles in central and eastern Missouri and the southern four-fifths of Illinois by area. [3]
Ameren is the holding company for the following: [3]
The Ameren Missouri subsidiary owns Bagnell Dam on the Osage River, which forms the Lake of the Ozarks. Ameren Missouri is responsible for managing water levels on the lake according to federal regulations. [3]
Background text: Wikipedia contributors, Ameren. Selected introductory paragraphs, licensed under CC BY-SA 4.0. Official filing data is cited separately.
Financial year, securities and disclosures
The SEC submissions record gives AMEREN CORP a fiscal year end of 1231 (MMDD). Individual filings below identify their own reporting period; the filing date is the publication event, not the financial year end. [1]
Listed securities: AEE (NYSE). Multiple symbols may represent different share classes or securities of the same registrant. [4]
History and key events
Financial results and regulatory disclosures
Annual, quarterly and current reports from the collected SEC record. Insider Forms 4 and 144 are excluded. This is a selected list, not a live filing feed.
Source-verified relationships
Companies in the same industry
Comparison candidates share the SEC SIC classification 4931. This does not imply ownership, partnership or trading relationships.
Related entities and concepts
Frequently asked questions
When was AMEREN CORP founded?
Founded: 1997. The linked source provides the background record. [2]
Where is the headquarters of AMEREN CORP?
Headquarters location: St. Louis. The linked source provides the background record. [2]
Which business sectors are recorded for AMEREN CORP?
Business sectors: public utility; energy industry; electric power industry. The linked source provides the background record. [2]
AMEREN CORP relationship map
Select a node to inspect its relationship and source.
2 verified direct relationships. Industry peers are not relationship edges.
Sources and review dates
- SEC — AMEREN CORP filing identity and securities ↗
- Wikidata — company background record (CC0) ↗
- Wikipedia contributors — Ameren (CC BY-SA 4.0) ↗
- SEC securities directory ↗
- Company chronology / filing ↗
Reviewed 23 October 2026. Financial periods and historical event dates are shown separately. Figures reflect their stated source dates; this page is not a live quote or investment recommendation.