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 |
|---|---|---|---|
| 8-K |
Current report
Other events
|
Aug 24, 2026 | Aug 24, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 18, 2026 | May 14, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 10, 2025 | Dec 10, 2025 |
| 8-K |
Current report
Other events
|
Sep 26, 2025 | Sep 26, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 12, 2025 | May 8, 2025 |
| 8-K |
Current report
Other events
|
Mar 3, 2025 | Mar 3, 2025 |
| 8-K |
Current report
Other events
|
Dec 20, 2024 | Dec 19, 2024 |
| 8-K |
Current report
Other events
|
Jun 27, 2024 | Jun 27, 2024 |
| 8-K |
Current report
Other events
|
Jun 21, 2024 | Jun 20, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 13, 2024 | May 9, 2024 |
| 8-K |
Current report
Other events
|
Dec 18, 2023 | Dec 14, 2023 |
| 8-K |
Current report
Other events
|
Nov 21, 2023 | Nov 16, 2023 |
| 8-K |
Current report
Other events
|
May 31, 2023 | May 31, 2023 |
| 8-K |
Current report
Shareholder vote results
|
May 12, 2023 | May 11, 2023 |
| 8-K |
Current report
Other events
|
Jan 23, 2023 | Jan 20, 2023 |
| 8-K |
Current report
Other events
|
Jan 9, 2023 | Jan 6, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 6, 2022 | Dec 6, 2022 |
| 8-K |
Current report
Other events
|
Nov 22, 2022 | Nov 22, 2022 |
| 8-K |
Current report
Other events
|
Aug 29, 2022 | Aug 29, 2022 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 13, 2022 | May 12, 2022 |
| 8-K |
Current report
Other events
|
Sep 13, 2021 | Sep 13, 2021 |
| 8-K |
Current report
Other events
|
Jun 29, 2021 | Jun 29, 2021 |
| 8-K |
Current report
Shareholder vote results
|
May 10, 2021 | May 6, 2021 |
| 8-K |
Current report
Other events
|
Nov 23, 2020 | Nov 23, 2020 |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2020 | May 7, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 11, 2019 | Dec 9, 2019 |
| 8-K |
Current report
Other events
|
Nov 26, 2019 | Nov 26, 2019 |
| 8-K |
Current report
Shareholder vote results
|
May 6, 2019 | May 2, 2019 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 4, 2018 | Dec 3, 2018 |
| 8-K |
Current report
Other events
|
Nov 15, 2018 | Nov 15, 2018 |
| 8-K |
Current report
Other events
|
May 22, 2018 | May 22, 2018 |
| 8-K |
Current report
Other events
|
Nov 28, 2017 | Nov 28, 2017 |
| 8-K |
Current report
Shareholder vote results
|
May 1, 2017 | Apr 27, 2017 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 8, 2016 | Dec 7, 2016 |
| 8-K |
Current report
Other events
|
Dec 6, 2016 | Dec 6, 2016 |
| 8-K |
Current report
Shareholder vote results
|
Apr 29, 2016 | Apr 28, 2016 |
| 8-K |
Current report
Other events
|
Dec 14, 2015 | Dec 14, 2015 |
| 8-K |
Current report
Shareholder vote results
|
Apr 24, 2015 | Apr 23, 2015 |
| 8-K |
Current report
Other events
|
Jan 23, 2015 | Jan 23, 2015 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Dec 18, 2014 | Dec 12, 2014 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 11, 2014 | Dec 11, 2014 |
| 8-K |
Current report
Other events
|
Dec 10, 2014 | Dec 10, 2014 |
| 8-K |
Current report
Other events
|
Jun 30, 2014 | Jun 30, 2014 |
| 8-K |
Current report
Shareholder vote results
|
Apr 25, 2014 | Apr 24, 2014 |
| 8-K |
Current report
Other events
|
Dec 10, 2013 | Dec 10, 2013 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 23, 2013 | Apr 22, 2013 |
| 8-K |
Current report
Other events
|
Jan 25, 2013 | Jan 25, 2013 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Nov 15, 2012 | Nov 14, 2012 |
| 8-K |
Current report
Other events
|
Aug 20, 2012 | Aug 20, 2012 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 13, 2012 | Jun 13, 2012 |
| 8-K |
Current report
Shareholder vote results
|
Apr 25, 2012 | Apr 24, 2012 |
| 8-K |
Current report
Other events
|
Jan 13, 2012 | Jan 10, 2012 |
| 8-K |
Current report
Other events
|
Jan 3, 2012 | Jan 3, 2012 |
| 8-K |
Current report
Shareholder vote results
|
Apr 21, 2011 | Apr 21, 2011 |
| 8-K |
Current report
Other events
|
Feb 18, 2011 | Feb 18, 2011 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Dec 15, 2010 | Dec 9, 2010 |
| 8-K |
Current report
Acquisition or sale of assets, New debt
|
Oct 7, 2010 | Oct 1, 2010 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Sep 13, 2010 | Sep 10, 2010 |
| 8-K |
Current report
Shareholder vote results
|
Sep 1, 2010 | Sep 1, 2010 |
| 8-K |
Current report
Other events
|
Aug 2, 2010 | Aug 2, 2010 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Apr 30, 2010 | Apr 27, 2010 |
| 8-K |
Current report
Other events
|
Apr 30, 2010 | Apr 29, 2010 |
| 8-K |
Current report
Material agreement
|
Apr 16, 2010 | Apr 13, 2010 |
| 8-K |
Current report
Other events
|
Mar 15, 2010 | Mar 15, 2010 |
| 8-K |
Current report
Other events
|
Sep 4, 2009 | Sep 4, 2009 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Jun 30, 2009 | Jun 30, 2009 |
| 8-K |
Current report
Other events
|
Jun 5, 2009 | Jun 5, 2009 |
| 8-K |
Current report
Other events
|
Sep 26, 2008 | Aug 28, 2008 |
| 8-K |
Current report
Other events
|
Sep 19, 2008 | Sep 15, 2008 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jul 29, 2008 | Jul 28, 2008 |
| 8-K |
Current report
Other events
|
Apr 1, 2008 | Mar 14, 2008 |
| 8-K |
Current report
Material agreement, Other events
|
Mar 28, 2008 | Mar 26, 2008 |
| 8-K |
Current report
Other events
|
Nov 2, 2007 | Nov 2, 2007 |
| 8-K |
Current report
Other events
|
Sep 19, 2007 | Sep 19, 2007 |
| 8-K |
Current report
Other events
|
Jul 23, 2007 | Jul 23, 2007 |
| 8-K |
Current report
Other events
|
Apr 25, 2007 | Apr 23, 2007 |
| 8-K |
Current report
Other events
|
Apr 20, 2007 | Apr 20, 2007 |
| 8-K |
Current report
Other events
|
Mar 15, 2007 | Mar 9, 2007 |
| 8-K |
Current report
Material agreement, New debt
|
Mar 14, 2007 | Mar 9, 2007 |
| 8-K |
Current report
Material agreement, New debt
|
Feb 13, 2007 | Feb 9, 2007 |
| 8-K |
Current report
Other events
|
Nov 22, 2006 | Nov 21, 2006 |
| 8-K |
Current report
Agreement ended, Results of operations, Other events
|
Nov 3, 2006 | Oct 31, 2006 |
| 8-K |
Current report
Other events
|
Oct 10, 2006 | Oct 9, 2006 |
| 8-K |
Current report
Other events
|
Oct 4, 2006 | Oct 2, 2006 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 18, 2006 | Sep 15, 2006 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Sep 8, 2006 | Sep 8, 2006 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Jul 18, 2006 | Jul 13, 2006 |
| 8-K |
Current report
Agreement ended, Other events
|
Jul 7, 2006 | Jul 7, 2006 |
| 8-K |
Current report
Agreement ended, Other events
|
Jul 7, 2006 | Jul 7, 2006 |
| 8-K |
Current report
New debt, Other events
|
Jun 19, 2006 | Jun 14, 2006 |
| 8-K |
Current report
Other events
|
Jun 7, 2006 | Jun 7, 2006 |
| 8-K |
Current report
Other events
|
Jun 1, 2006 | May 30, 2006 |
| 8-K |
Current report
Material agreement, Results of operations, Other events
|
May 4, 2006 | May 2, 2006 |
| 8-K |
Current report
Material agreement
|
Feb 16, 2006 | Feb 10, 2006 |
| 8-K |
Current report
Material agreement
|
Jan 13, 2006 | Jan 9, 2006 |
| 8-K |
Current report
Other events
|
Dec 27, 2005 | Dec 27, 2005 |
| 8-K |
Current report
Material agreement
|
Dec 15, 2005 | Dec 9, 2005 |
| 8-K |
Current report
Other events
|
Sep 27, 2005 | Sep 27, 2005 |
| 8-K |
Current report
Other events
|
Sep 15, 2005 | Sep 1, 2005 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Jul 15, 2005 | Jul 14, 2005 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
May 2, 2005 | May 1, 2005 |
| 8-K |
Current report
Agreement ended
|
Apr 7, 2005 | Apr 6, 2005 |
| 8-K |
Current report
Material agreement, Officer or director change
|
Feb 14, 2005 | Feb 11, 2005 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Oct 14, 2004 | Oct 14, 2004 |
| 8-K |
Current report
Material agreement, New debt, Change in control, Officer or director change, Bylaw or fiscal year change, Other events
|
Oct 1, 2004 | Oct 1, 2004 |
| 8-K |
Current report
Material agreement
|
Sep 24, 2004 | Sep 24, 2004 |
| 8-K |
Current report
New debt
|
Sep 21, 2004 | Sep 21, 2004 |
| 8-K |
Current report
Other events
|
Sep 8, 2004 | Sep 8, 2004 |
| 8-K |
Current report
Officer or director change, Other events
|
Sep 1, 2004 | Sep 1, 2004 |
| 8-K | Current report | Jul 14, 2004 | Jul 14, 2004 |
| 8-K | Current report | Mar 24, 2004 | Mar 23, 2004 |
| 8-K | Current report | Feb 3, 2004 | Feb 3, 2004 |
| 8-K | Current report | Dec 5, 2003 | Dec 5, 2003 |
| 8-K | Current report | Oct 10, 2003 | Oct 10, 2003 |
| 8-K | Current report | Jun 2, 2003 | May 30, 2003 |
| 8-K | Current report | Nov 27, 2002 | Nov 27, 2002 |
| 8-K | Current report | May 30, 2002 | May 30, 2002 |
| 8-K | Current report | Jan 12, 2001 | Jan 12, 2001 |
| 8-K | Current report | May 5, 2000 | May 1, 2000 |
| 8-K | Current report | Dec 20, 1999 | Nov 24, 1999 |
| 8-K | Current report | Oct 8, 1998 | Sep 24, 1998 |
| 8-K/A | Amended current report | Jun 23, 1998 | Jun 23, 1998 |
| 8-K | Current report | Jun 12, 1998 | Jun 12, 1998 |
| 8-K | Current report | Jan 20, 1998 | Jan 20, 1998 |
| 8-K | Current report | Jan 2, 1998 | Dec 31, 1997 |
| 8-K | Current report | Dec 23, 1997 | Dec 16, 1997 |
| 8-K | Current report | Dec 5, 1997 | Nov 24, 1997 |
| 8-K | Current report | Dec 5, 1997 | Nov 24, 1997 |
| 8-K | Current report | Jun 6, 1997 | Jun 1, 1997 |
| 8-K | Current report | Mar 26, 1997 | Mar 25, 1997 |
| 8-K | Current report | Mar 20, 1997 | Mar 20, 1997 |
| 8-K | Current report | Feb 3, 1997 | Dec 23, 1996 |
| 8-K | Current report | Jun 21, 1996 | Jun 20, 1996 |
| 8-K | Current report | Jun 7, 1996 | May 20, 1996 |
| 8-K | Current report | Jun 8, 1995 | Jun 5, 1995 |
| 8-K | Current report | Jun 2, 1995 | Jun 1, 1995 |
Showing 136 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
- Duke Energy CORP DUK
- Xcel Energy Inc XEL
- Exelon Corp EXC
- Consolidated Edison Inc ED
- PG&E Corp PCG
- Wec Energy Group, Inc. WEC
- Public Service Enterprise Group Inc PEG
- Ameren Corp AEE
Source: SEC EDGAR filings. This is company-reported data, not investment advice.