Ameren Illinois Co SEC filings AILIM

Ameren Illinois Co has 473 filings in SEC EDGAR's recent list, going back to Feb 28, 1994. Its latest annual report, Form 10-K, was filed on Feb 18, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 3, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 24, 2026 (other events). The company's fiscal year ends on December 31.

Form Description Filed Period
10-K Annual report Feb 18, 2026 Dec 31, 2025
10-K Annual report Feb 18, 2025 Dec 31, 2024
10-K Annual report Feb 29, 2024 Dec 31, 2023
10-K Annual report Feb 22, 2023 Dec 31, 2022
10-K Annual report Feb 23, 2022 Dec 31, 2021
10-K Annual report Feb 22, 2021 Dec 31, 2020
10-K Annual report Feb 28, 2020 Dec 31, 2019
10-K Annual report Feb 26, 2019 Dec 31, 2018
10-K Annual report Feb 28, 2018 Dec 31, 2017
10-K Annual report Feb 28, 2017 Dec 31, 2016
10-K Annual report Feb 26, 2016 Dec 31, 2015
10-K Annual report Mar 2, 2015 Dec 31, 2014
ARS Annual report to shareholders Mar 14, 2014 Dec 31, 2013
10-K Annual report Mar 3, 2014 Dec 31, 2013
ARS Annual report to shareholders Mar 14, 2013 Dec 31, 2012
10-K Annual report Mar 1, 2013 Dec 31, 2012
10-K Annual report Feb 28, 2012 Nov 23, 2011
10-K Annual report Feb 24, 2011 Dec 31, 2010
10-K Annual report Feb 26, 2010 Dec 31, 2009
10-K Annual report Mar 2, 2009 Dec 31, 2008
10-K Annual report Feb 29, 2008 Dec 31, 2007
10-K Annual report Mar 1, 2007 Dec 31, 2006
10-K Annual report Mar 7, 2006 Dec 31, 2005
10-K Annual report Mar 9, 2005 Dec 31, 2004
10-K Annual report Mar 9, 2004 Dec 31, 2003
10-K/A Amended annual report Apr 1, 2003 Dec 31, 2002
10-K Annual report Mar 24, 2003 Dec 31, 2002
10-K Annual report Mar 30, 1999 Dec 31, 1998
10-K Annual report Mar 30, 1998 Dec 31, 1997
10-K Annual report Mar 11, 1997 Dec 31, 1996
10-K Annual report Mar 12, 1996 Dec 31, 1995
10-K Annual report Mar 9, 1995 Dec 31, 1994
10-K Annual report Mar 16, 1994 Dec 31, 1993

Showing 33 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.

New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.

Company profile

Industry
Electric & Other Services Combined (SIC 4931)
Listed as
AILIH (OTC), AILLI (OTC), AILLM (OTC), AILLN (OTC), AILIM (OTC), AILLO (OTC), AILIN (OTC), AILLP (OTC), AILIO (OTC), AILIP (OTC)
Fiscal year ends
December 31
Incorporated in
IL
Headquarters
Collinsville, IL
SEC CIK
18654
Former names
CENTRAL ILLINOIS PUBLIC SERVICE CO (until Sep 13, 2010)

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Source: SEC EDGAR filings. This is company-reported data, not investment advice.