Ameren Illinois Co SEC filings AILLI

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-Q Quarterly report Aug 3, 2026 Jun 30, 2026
10-Q Quarterly report May 8, 2026 Mar 31, 2026
10-Q Quarterly report Nov 6, 2025 Sep 30, 2025
10-Q Quarterly report Aug 4, 2025 Jun 30, 2025
10-Q Quarterly report May 5, 2025 Mar 31, 2025
10-Q Quarterly report Nov 7, 2024 Sep 30, 2024
10-Q Quarterly report Aug 5, 2024 Jun 30, 2024
10-Q Quarterly report May 6, 2024 Mar 31, 2024
10-Q Quarterly report Nov 9, 2023 Sep 30, 2023
10-Q Quarterly report Aug 3, 2023 Jun 30, 2023
10-Q Quarterly report May 5, 2023 Mar 31, 2023
10-Q Quarterly report Nov 4, 2022 Sep 30, 2022
10-Q Quarterly report Aug 8, 2022 Jun 30, 2022
10-Q Quarterly report May 6, 2022 Mar 31, 2022
10-Q Quarterly report Nov 4, 2021 Sep 30, 2021
10-Q Quarterly report Aug 6, 2021 Jun 30, 2021
10-Q Quarterly report May 10, 2021 Mar 31, 2021
10-Q Quarterly report Nov 5, 2020 Sep 30, 2020
10-Q Quarterly report Aug 7, 2020 Jun 30, 2020
10-Q Quarterly report May 11, 2020 Mar 31, 2020
10-Q Quarterly report Nov 8, 2019 Sep 30, 2019
10-Q Quarterly report Aug 2, 2019 Jun 30, 2019
10-Q Quarterly report May 10, 2019 Mar 31, 2019
10-Q Quarterly report Nov 2, 2018 Sep 30, 2018
10-Q Quarterly report Aug 8, 2018 Jun 30, 2018
10-Q Quarterly report May 9, 2018 Mar 31, 2018
10-Q Quarterly report Nov 3, 2017 Sep 30, 2017
10-Q Quarterly report Aug 4, 2017 Jun 30, 2017
10-Q Quarterly report May 5, 2017 Mar 31, 2017
10-Q Quarterly report Nov 4, 2016 Sep 30, 2016
10-Q Quarterly report Aug 5, 2016 Jun 30, 2016
10-Q Quarterly report May 10, 2016 Mar 31, 2016
10-Q Quarterly report Nov 6, 2015 Sep 30, 2015
10-Q Quarterly report Aug 6, 2015 Jun 30, 2015
10-Q Quarterly report May 11, 2015 Mar 31, 2015
10-Q Quarterly report Nov 10, 2014 Sep 30, 2014
10-Q Quarterly report Aug 11, 2014 Jun 30, 2014
10-Q Quarterly report May 12, 2014 Mar 31, 2014
10-Q Quarterly report Nov 8, 2013 Sep 30, 2013
10-Q Quarterly report Aug 9, 2013 Jun 30, 2013
10-Q Quarterly report May 10, 2013 Mar 31, 2013
10-Q Quarterly report Nov 9, 2012 Sep 30, 2012
10-Q Quarterly report Aug 8, 2012 Jun 30, 2012
10-Q Quarterly report May 10, 2012 Mar 31, 2012
10-Q Quarterly report Nov 8, 2011 Sep 30, 2011
10-Q Quarterly report Aug 9, 2011 Jun 30, 2011
10-Q Quarterly report May 10, 2011 Mar 31, 2011
10-Q Quarterly report Nov 8, 2010 Sep 30, 2010
10-Q Quarterly report Aug 9, 2010 Jun 30, 2010
10-Q Quarterly report May 10, 2010 Mar 31, 2010
10-Q Quarterly report Nov 9, 2009 Sep 30, 2009
10-Q Quarterly report Aug 10, 2009 Jun 30, 2009
10-Q Quarterly report May 8, 2009 Mar 31, 2009
10-Q Quarterly report Nov 10, 2008 Sep 30, 2008
10-Q Quarterly report Aug 8, 2008 Jun 30, 2008
10-Q Quarterly report May 8, 2008 Mar 31, 2008
10-Q Quarterly report Nov 9, 2007 Sep 30, 2007
10-Q Quarterly report Aug 9, 2007 Jun 30, 2007
10-Q Quarterly report May 10, 2007 Mar 31, 2007
10-Q Quarterly report Nov 9, 2006 Sep 30, 2006
10-Q Quarterly report Aug 9, 2006 Jun 30, 2006
10-Q Quarterly report May 10, 2006 Mar 31, 2006
10-Q Quarterly report Nov 9, 2005 Sep 30, 2005
10-Q Quarterly report Aug 9, 2005 Jun 30, 2005
10-Q Quarterly report May 10, 2005 Mar 31, 2005
10-Q Quarterly report Nov 9, 2004 Sep 30, 2004
10-Q Quarterly report Aug 9, 2004 Jun 30, 2004
10-Q Quarterly report May 10, 2004 Mar 31, 2004
10-Q Quarterly report Nov 14, 2003 Sep 30, 2003
10-Q Quarterly report Aug 14, 2003 Jun 30, 2003
10-Q Quarterly report May 14, 2003 Mar 31, 2003
10-Q Quarterly report Nov 14, 2002 Sep 30, 2002
10-Q Quarterly report Aug 14, 2002 Jun 30, 2002
10-Q Quarterly report May 15, 2002 Mar 31, 2002
10-Q Quarterly report Nov 14, 2001 Sep 30, 2001
10-Q Quarterly report Aug 14, 2001 Jun 30, 2001
10-Q Quarterly report May 15, 2001 Mar 31, 2001
10-Q Quarterly report Nov 14, 2000 Sep 30, 2000
10-Q Quarterly report Aug 14, 2000 Jun 30, 2000
10-Q Quarterly report May 15, 2000 Mar 31, 2000
10-Q Quarterly report Nov 15, 1999 Sep 30, 1999
10-Q Quarterly report Aug 13, 1999 Jun 30, 1999
10-Q Quarterly report May 14, 1999 Mar 31, 1999
10-Q/A Amended quarterly report Dec 15, 1998 Sep 30, 1998
10-Q Quarterly report Nov 13, 1998 Sep 30, 1998
10-Q Quarterly report Aug 13, 1998 Jun 30, 1998
10-Q Quarterly report May 14, 1998 Mar 31, 1998
10-Q Quarterly report Nov 14, 1997 Sep 30, 1997
10-Q Quarterly report Aug 14, 1997 Jun 30, 1997
10-Q Quarterly report May 14, 1997 Mar 31, 1997
10-Q Quarterly report Nov 14, 1996 Sep 30, 1996
10-Q Quarterly report Aug 14, 1996 Jun 30, 1996
10-Q Quarterly report May 14, 1996 Mar 31, 1996
10-Q Quarterly report Nov 13, 1995 Sep 30, 1995
10-Q/A Amended quarterly report Aug 15, 1995 Jun 30, 1995
10-Q Quarterly report Aug 14, 1995 Jun 30, 1995
10-Q Quarterly report May 2, 1995 Mar 31, 1995
10-Q/A Amended quarterly report Nov 16, 1994 Sep 30, 1994
10-Q Quarterly report Nov 14, 1994 Sep 30, 1994
10-Q Quarterly report Aug 12, 1994 Jun 30, 1994
10-Q Quarterly report May 16, 1994 Mar 31, 1994

Showing 101 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)

Other Electric & Other Services Combined companies

All 27 Electric & Other Services Combined companies

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