AMEREN CORP
For the period ended Dec 31, 2025. Filed Feb 18, 2026.
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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.
FY2025 · Filed Feb 18, 2026
AEE$114.02+1.0%Stored close · as of Nov 9, 2026
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EXHIBIT INDEX
The documents listed below are being filed or have previously been filed on behalf of the Ameren Companies and are incorporated herein by reference from the documents indicated and made a part hereof. Exhibits not identified as previously filed are filed herewith:
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| Articles of Incorporation/ By-Laws | |||
|---|---|---|---|
| 3.1(i) | Ameren | Restated Articles of Incorporation of Ameren | Annex F to Part I of the Registration Statement on Form S-4, File No. 33-64165 |
| 3.2(i) | Ameren | Certificate of Amendment to Ameren’s Restated Articles of Incorporation filed December 14, 1998 | 1998 Form 10-K, Exhibit 3(i), File No. 1-14756 |
| 3.3(i) | Ameren | Certificate of Amendment to Ameren’s Restated Articles of Incorporation filed April 21, 2011 | April 21, 2011 Form 8-K, Exhibit 3(i),File No. 1-14756 |
| 3.4(i) | Ameren | Certificate of Amendment to Ameren’s Restated Articles of Incorporation filed December 18, 2012 | December 18, 2012 Form 8-K, Exhibit 3.1(i),File No. 1-14756 |
| 3.5(i) | Ameren Missouri | Restated Articles of Incorporation of Ameren Missouri | 1993 Form 10-K, Exhibit 3(i),File No. 1-2967 |
| 3.6(i) | Ameren Illinois | Restated Articles of Incorporation of Ameren Illinois | 2010 Form 10-K, Exhibit 3.4(i),File No. 1-3672 |
| 3.7(ii) | Ameren | Bylaws of Ameren, as amended August 9, 2024 | August 9, 2024 Form 8-K, Exhibit 3.1,File No. 1-14756 |
| 3.8(ii) | Ameren Missouri | Bylaws of Ameren Missouri, as amended February 19, 2021 | 2020 Form 10-K, Exhibit 3.8(ii), File No. 1-2967 |
| 3.9(ii) | Ameren Illinois | Bylaws of Ameren Illinois, as amended February 19, 2021 | 2020 Form 10-K, Exhibit 3.9(ii), File No. 1-3672 |
| Instruments Defining Rights of Security Holders, Including Indentures | |||
| 4.1 | Ameren | Indenture, dated as of December 1, 2001 from Ameren to The Bank of New York Mellon Trust Company, N.A., as successor trustee, relating to senior debt securities (Ameren Indenture) | Exhibit 4.5, File No. 333-81774 |
| 4.2 | Ameren | First Supplemental Indenture to Ameren Senior Indenture dated as of May 19, 2008 | June 30, 2008 Form 10-Q, Exhibit 4.1,File No. 1-14756 |
| 4.3 | Ameren | Ameren Indenture Company Order, dated November 24, 2015, establishing the 3.65% Senior Notes due 2026 (including the global note) | November 24, 2015 Form 8-K, Exhibits 4.3 and 4.5, File No. 1-14756 |
| 4.4 | Ameren | Ameren Indenture Company Order, dated April 3, 2020, establishing the 3.50% Senior Notes due 2031 (including the global note) | April 3, 2020 Form 8-K, Exhibits 4.3 and 4.4, File No. 1-14756 |
| 4.5 | Ameren | Ameren Indenture Company Order, dated March 5, 2021, establishing the 1.75% Senior Notes due 2028 (including the global note) | March 5, 2021 Form 8-K, Exhibits 4.3 and 4.4, File No. 1-14756 |
| 4.6 | Ameren | Ameren Indenture Company Order, dated November 18, 2021, establishing the 1.95% Senior Notes due 2027 (including the global note) | November 18, 2021 Form 8-K, Exhibits 4.3 and 4.4, File No. 1-14756 |
| 4.7 | Ameren | Ameren Indenture Company Order, dated November 20, 2023, establishing the 5.70% Senior Notes due 2026 (including the global note) | November 20, 2023 Form 8-K, Exhibits 4.3 and 4.4, File No. 1-14756 |
| 4.8 | Ameren | Ameren Indenture Company Order, dated December 21, 2023, establishing the 5.00% Senior Notes due 2029 (including the global note) | December 21, 2023 Form 8-K, Exhibits 4.3 and 4.4, File No. 1-14756 |
| 4.9 | Ameren | Ameren Indenture Company Order, dated March 7, 2025, establishing the 5.375% Senior Notes due 2035 (including the global note) | March 7, 2025 Form 8-K, Exhibits 4.3 and 4.4, File No. 1-14756 |
| 4.10 | Ameren | Note Purchase Agreement, dated June 22, 2017, between Ameren Transmission Company of Illinois and the several purchasers named therein. | June 26, 2017 Form 8-K, Exhibit 4.1, File No. 1-14756 |
| 4.11 | Ameren | Note Purchase Agreement, dated as of November 16, 2021, between Ameren Transmission Company of Illinois and the several purchasers named therein. | 2021 Form 10-K, Exhibit 4.9, File No. 1-14756 |
| 4.12 | Ameren | Note Purchase Agreement, dated as of August 30, 2024, between Ameren Transmission Company of Illinois and the several purchasers named therein. | September 30, 2024 Form 10-Q, Exhibit 4.1, File No. 1-14756 |
| 4.13 | AmerenAmeren Missouri | Indenture of Mortgage and Deed of Trust, dated June 15, 1937 (Ameren Missouri Mortgage), from Ameren Missouri to The Bank of New York Mellon, as successor trustee, as amended May 1, 1941, and Second Supplemental Indenture dated May 1, 1941 | Exhibit B-1, File No. 2-4940 |
| 4.14 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated as of July 1, 1956 | Exhibit 4.22, File No. 333-222108 |
| 4.15 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated as of April 1, 1971 | Exhibit 4.23, File No. 333-222108 |
| 4.16 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated as of February 1, 1974 | Exhibit 4.24, File No. 333-222108 |
| 4.17 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated as of July 7, 1980 | Exhibit 4.25, File No. 333-222108 |
| 4.18 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated as of October 1, 1993 | 1993 Form 10-K, Exhibit 4.8,File No. 1-2967 |
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| 4.19 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated as of February 1, 2000 | 2000 Form 10-K, Exhibit 99,File No. 1-2967 |
| 4.20 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated August 15, 2002 | August 23, 2002 Form 8-K, Exhibit 4.3,File No. 1-2967 |
| 4.21 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 5, 2003 relative to Series BB | March 11, 2003 Form 8-K, Exhibit 4.4,File No. 1-2967 |
| 4.22 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated February 1, 2004 relative to Series 2004A (1998A) | March 31, 2004 Form 10-Q, Exhibit 4.1,File No. 1-2967 |
| 4.23 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated February 1, 2004 relative to Series 2004B (1998B) | March 31, 2004 Form 10-Q, Exhibit 4.2,File No. 1-2967 |
| 4.24 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated February 1, 2004 relative to Series 2004C (1998C) | March 31, 2004 Form 10-Q, Exhibit 4.3,File No. 1-2967 |
| 4.25 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated February 1, 2004 relative to Series 2004H (1992) | March 31, 2004 Form 10-Q, Exhibit 4.8,File No. 1-2967 |
| 4.26 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated July 1, 2005 relative to Series II | July 21, 2005 Form 8-K, Exhibit 4.4,File No. 1-2967 |
| 4.27 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 1, 2009 relative to Series NN | March 23, 2009 Form 8-K, Exhibit 4.5,File No. 1-2967 |
| 4.28 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated May 15, 2012 | Exhibit 4.45, File No. 333-182258 |
| 4.29 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated September 1, 2012 relative to Series OO | September 11, 2012 Form 8-K, Exhibit 4.4, File No. 1-2967 |
| 4.30 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated April 1, 2014 relative to Series PP | April 4, 2014 Form 8-K, Exhibit 4.5, File No. 1-2967 |
| 4.31 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 15, 2015 relative to Series QQ | April 6, 2015 Form 8-K, Exhibit 4.5, File No. 1-2967 |
| 4.32 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated June 1, 2017 relative to Series RR | June 15, 2017 Form 8-K, Exhibit 4.5, File No. 1-2967 |
| 4.33 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated April 1, 2018 for 4.00% First Mortgage Bonds due 2048 | April 6, 2018 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.34 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 1, 2019, for 3.50% First Mortgage Bonds due 2029 | March 6, 2019 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.35 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated September 15, 2019, for 3.25% First Mortgage Bonds due 2049 | October 1, 2019 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.36 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 1, 2020, for 2.95% First Mortgage Bonds due 2030 | March 20, 2020 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.37 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated October 1, 2020, for 2.625% First Mortgage Bonds due 2051 | October 9, 2020 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.38 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated June 1, 2021, for 2.15% First Mortgage Bonds due 2032 | June 22, 2021 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.39 | AmerenAmeren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 1, 2022, for 3.90% First Mortgage Bonds due 2052 | April 1, 2022 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.40 | Ameren Ameren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated February 1, 2023, for 5.45% First Mortgage Bonds due 2053 | March 13, 2023 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.41 | Ameren Ameren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated January 1, 2024, for 5.25% First Mortgage Bonds due 2054 | January 9, 2024 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.42 | Ameren Ameren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March1, 2024, for 5.20% First Mortgage Bonds due 2034 | April 4, 2024 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.43 | Ameren Ameren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated September 1, 2024, for 5.125% First Mortgage Bonds due 2055 | October 7, 2024 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.44 | Ameren Ameren Missouri | Supplemental Indenture to the Ameren Missouri Mortgage dated March 1, 2025, for 5.25% First Mortgage Bonds due 2035 | April 4, 2025 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.45 | AmerenAmeren Missouri | Loan Agreement, dated as of December 1, 1992, between the Missouri Environmental Authority and Ameren Missouri, together with Indenture of Trust dated as of December 1, 1992, between the Missouri Environmental Authority and UMB Bank, N.A. as successor trustee to Mercantile Bank of St. Louis, N.A. | 1992 Form 10-K, Exhibit 4.38,File No. 1-2967 |
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| 4.46 | AmerenAmeren Missouri | First Amendment, dated as of February 1, 2004, to Loan Agreement dated as of December 1, 1992, between the Missouri Environmental Authority and Ameren Missouri | March 31, 2004 Form 10-Q, Exhibit 4.10,File No. 1-2967 |
| 4.47 | AmerenAmeren Missouri | Series 1998A Loan Agreement, dated as of September 1, 1998, between the Missouri Environmental Authority and Ameren Missouri | September 30, 1998 Form 10-Q,Exhibit 4.28, File No. 1-2967 |
| 4.48 | AmerenAmeren Missouri | First Amendment, dated as of February 1, 2004, to Series 1998A Loan Agreement dated as of September 1, 1998, between the Missouri Environmental Authority and Ameren Missouri | March 31, 2004 Form 10-Q, Exhibit 4.11,File No. 1-2967 |
| 4.49 | AmerenAmeren Missouri | Series 1998B Loan Agreement, dated as of September 1, 1998, between the Missouri Environmental Authority and Ameren Missouri | September 30, 1998 Form 10-Q,Exhibit 4.29, File No. 1-2967 |
| 4.50 | AmerenAmeren Missouri | First Amendment, dated as of February 1, 2004, to Series 1998B Loan Agreement dated as of September 1, 1998, between the Missouri Environmental Authority and Ameren Missouri | March 31, 2004 Form 10-Q, Exhibit 4.12,File No. 1-2967 |
| 4.51 | AmerenAmeren Missouri | Series 1998C Loan Agreement, dated as of September 1, 1998, between the Missouri Environmental Authority and Ameren Missouri | September 30, 1998 Form 10-Q,Exhibit 4.30, File No. 1-2967 |
| 4.52 | AmerenAmeren Missouri | First Amendment, dated as of February 1, 2004, to Series 1998C Loan Agreement dated as of September 1, 1998, between the Missouri Environmental Authority and Ameren Missouri | March 31, 2004 Form 10-Q, Exhibit 4.13,File No. 1-2967 |
| 4.53 | AmerenAmeren Missouri | Indenture, dated as of August 15, 2002, from Ameren Missouri to The Bank of New York Mellon, as successor trustee (relating to senior secured debt securities) (Ameren Missouri Indenture) | August 23, 2002 Form 8-K, Exhibit 4.1,File No. 1-2967 |
| 4.54 | AmerenAmeren Missouri | First Supplemental Indenture to the Ameren Missouri Indenture, dated as of May 15, 2012 | Exhibit 4.48, File No. 333-182258 |
| 4.55 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated March 10, 2003, establishing the 5.50% Senior Secured Notes due 2034 (including the global note) | March 11, 2003 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-2967 |
| 4.56 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated July 21, 2005, establishing the 5.30% Senior Secured Notes due 2037 (including the global note) | July 21, 2005 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-2967 |
| 4.57 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated March 20, 2009, establishing the 8.45% Senior Secured Notes due 2039 (including the global note) | March 23, 2009 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-2967 |
| 4.58 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated September 11, 2012, establishing the 3.90% Senior Secured Notes due 2042 (including the global note) | September 30, 2012 Form 10-Q, Exhibit 4.1 and September 11, 2012 Form 8-K, Exhibit 4.2, File No. 1-2967 |
| 4.59 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated April 6, 2015, establishing the 3.65% Senior Secured Notes due 2045 (including the global note) | April 6, 2015 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-2967 |
| 4.60 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated June 23, 2016, requesting authentication of an additional $150,000,000 aggregate principal amount of 3.65% Senior Secured Notes due 2045 (including the global note) | June 23, 2016 Form 8-K, Exhibits 4.3, and 4.4, File No. 1-2967 |
| 4.61 | AmerenAmeren Missouri | Ameren Missouri Indenture Company Order, dated June 15, 2017, establishing the 2.950% Senior Secured Notes due 2027 (including the global note) | June 15, 2017 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-2967 |
| 4.62 | AmerenAmeren Illinois | Indenture, dated as of December 1, 1998, from Ameren Illinois (formerly Central Illinois Public Service Company) to The Bank of New York Mellon Trust Company, N.A., as successor trustee (CIPS Indenture) | Exhibit 4.4, File No. 333-59438 |
| 4.63 | AmerenAmeren Illinois | First Supplemental Indenture to the CIPS Indenture, dated as of June 14, 2006 | June 19, 2006 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.64 | AmerenAmeren Illinois | Second Supplemental Indenture to the CIPS Indenture, dated as of March 1, 2010 | Exhibit 4.17, File No. 333-166095 |
| 4.65 | AmerenAmeren Illinois | Third Supplemental Indenture to the CIPS Indenture, dated as of October 1, 2010 | 2010 Form 10-K, Exhibit 4.59, File No. 1-3672 |
| 4.66 | AmerenAmeren Illinois | Ameren Illinois Global Note, dated October 1, 2010, representing CIPS Indenture Senior Notes, 6.125% due 2028 | 2010 Form 10-K, Exhibit 4.60, File No. 1-3672 |
| 4.67 | AmerenAmeren Illinois | Ameren Illinois Global Note, dated October 1, 2010, representing CIPS Indenture Senior Notes, 6.70% Series Secured Notes due 2036 | 2010 Form 10-K, Exhibit 4.62, File No. 1-3672 |
| 4.68 | AmerenAmeren Illinois | Indenture, dated as of June 1, 2006, from Ameren Illinois (successor in interest to Central Illinois Light Company) to The Bank of New York Mellon Trust Company, N.A., as successor trustee (CILCO Indenture) | June 19, 2006 Form 8-K, Exhibit 4.3, File No. 1-14756 |
| 4.69 | AmerenAmeren Illinois | First Supplemental Indenture to the CILCO Indenture, dated October 1, 2010 | October 7, 2010 Form 8-K, Exhibit 4.1, File No. 1-3672 |
| 4.70 | AmerenAmeren Illinois | Second Supplemental Indenture to the CILCO Indenture dated as of July 21, 2011 | September 30, 2011 Form 10-Q, Exhibit 4.1, File No. 1-3672 |
| 4.71 | AmerenAmeren Illinois | Third Supplemental Indenture to the CILCO Indenture, dated as of October 15, 2019 | September 30, 2019 Form 10-Q, Exhibit 4.2, File No. 1-3672 |
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| 4.72 | AmerenAmeren Illinois | CILCO Indenture Company Order, dated June 14, 2006, establishing the 6.70% Senior Secured Notes due 2036 (including the global note) | June 19, 2006 Form 8-K, Exhibit 4.6, File No. 1-14756 |
| 4.73 | AmerenAmeren Illinois | General Mortgage Indenture and Deed of Trust, dated as of November 1, 1992 between Ameren Illinois (successor in interest to Illinois Power Company) and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Ameren Illinois Mortgage) | 1992 Form 10-K, Exhibit 4(cc), File No. 1-3004 |
| 4.74 | AmerenAmeren Illinois | Supplemental Indenture amending the Ameren Illinois Mortgage dated as of December 15, 2002 | December 23, 2002 Form 8-K, Exhibit 4.1, File No. 1-3004 |
| 4.75 | AmerenAmeren Illinois | Supplemental Indenture, dated as of October 1, 2010, to Ameren Illinois Mortgage for Series CIPS-AA and CIPS-CC | October 7, 2010 Form 8-K, Exhibit 4.9, File No. 1-3672 |
| 4.76 | AmerenAmeren Illinois | Supplemental Indenture, dated as of January 15, 2011, to Ameren Illinois Mortgage | Exhibit 4.78, File No. 333-182258 |
| 4.77 | Ameren Ameren Illinois | Supplemental Indenture, dated as of August 1, 2012, to Ameren Illinois Mortgage for Series EE | August 20, 2012 Form 8-K, Exhibit 4.5, File No. 1-3672 |
| 4.78 | AmerenAmeren Illinois | Supplemental Indenture, dated as of December 1, 2013, to Ameren Illinois Mortgage for Series FF | December 10, 2013 Form 8-K, Exhibit 4.5, File No. 1-3672 |
| 4.79 | AmerenAmeren Illinois | Supplemental Indenture, dated as of June 1, 2014, to Ameren Illinois Mortgage for Series GG | June 30, 2014 Form 8-K, Exhibit 4.5, File No. 1-3672 |
| 4.80 | AmerenAmeren Illinois | Supplemental Indenture, dated as of December 1, 2014, to Ameren Illinois Mortgage for Series HH | December 10, 2014 Form 8-K, Exhibit 4.5, File No. 1-3672 |
| 4.81 | AmerenAmeren Illinois | Supplemental Indenture, dated as of December 1, 2015, to Ameren Illinois Mortgage for Series II | December 14, 2015 Form 8-K, Exhibit 4.5, File No. 1-3672 |
| 4.82 | AmerenAmeren Illinois | Supplemental Indenture, dated as of October 25, 2017, to the Ameren Illinois Mortgage | September 30, 2017 Form 10-Q, Exhibit 4.1, File No. 1-3672 |
| 4.83 | AmerenAmeren Illinois | Supplemental Indenture, dated as of November 1, 2017, to the Ameren Illinois Mortgage for 3.70% First Mortgage Bonds due 2047 | November 28, 2017 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.84 | AmerenAmeren Illinois | Supplemental Indenture, dated as of May 1, 2018, to Ameren Illinois Mortgage for 3.80% First Mortgage Bonds due 2028 | May 22, 2018 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.85 | AmerenAmeren Illinois | Supplemental Indenture, dated as of November 1, 2018, to Ameren Illinois Mortgage for 4.50% First Mortgage Bonds due 2049 | November 15, 2018 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.86 | AmerenAmeren Illinois | Supplemental Indenture, dated as of October 15, 2019, to Ameren Illinois Mortgage for First Mortgage Bonds, Senior Notes Series CILCO-AA | September 30, 2019 Form 10-Q, Exhibit 4.3, File No. 1-3672 |
| 4.87 | AmerenAmeren Illinois | Supplemental Indenture, dated as of November 1, 2019, to the Ameren Illinois Mortgage for 3.25% First Mortgage Bonds due 2050 | November 26, 2019 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.88 | AmerenAmeren Illinois | Supplemental Indenture, dated as of December 15, 2019, to the Ameren Illinois Mortgage | 2019 Form 10-K, Exhibit 4.79, File No. 1-3672 |
| 4.89 | AmerenAmeren Illinois | Supplemental Indenture, dated as of November 1, 2020, to Ameren Illinois Mortgage for 1.55% First Mortgage Bonds due 2030 | November 23, 2020 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.90 | Ameren Ameren Illinois | Supplemental Indenture, dated as of June 1, 2021, to Ameren Illinois Mortgage for 0.375% First Mortgage Bonds due 2023 and 2.90% First Mortgage Bonds due 2051 | June 29, 2021 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.91 | Ameren Ameren Illinois | Supplemental Indenture, dated as of August 1, 2022, to Ameren Illinois Mortgage for 3.85% First Mortgage Bonds due 2032 | August 29, 2022 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.92 | Ameren Ameren Illinois | Supplemental Indenture, dated as of November 1, 2022, to Ameren Illinois Mortgage for 5.90% First Mortgage Bonds due 2052 | November 22, 2022 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.93 | Ameren Ameren Illinois | Supplemental Indenture, dated as of May 1, 2023, to Ameren Illinois Mortgage for 4.95% First Mortgage Bonds due 2033 | May 31, 2023 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.94 | Ameren Ameren Illinois | Supplemental Indenture, dated as of June 1, 2024, to Ameren Illinois Mortgage for 5.55% First Mortgage Bonds due 2054 | June 27, 2024 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.95 | Ameren Ameren Illinois | Supplemental Indenture, dated as of February 1, 2025, to Ameren Illinois Mortgage for 5.625% First Mortgage Bonds due 2055 | March 3, 2025 Form 8-K, Exhibit 4.2, File No. 1-3672 |
| 4.96 | Ameren Ameren Illinois | Indenture, dated as of June 1, 2006, from Ameren Illinois (successor in interest to Illinois Power Company) to The Bank of New York Mellon Trust Company, N.A., as successor trustee (Ameren Illinois Indenture) | June 19, 2006 Form 8-K, Exhibit 4.4, File No. 1-14756 |
| 4.97 | Ameren Ameren Illinois | First Supplemental Indenture, dated as of October 1, 2010, to the Ameren Illinois Indenture for Series CIPS-AA and CIPS-CC | October 7, 2010 Form 8-K, Exhibit 4.5, File No. 1-14756 |
| 4.98 | Ameren Ameren Illinois | Second Supplemental Indenture to the Ameren Illinois Indenture dated as of July 21, 2011 | September 30, 2011 Form 10-Q, Exhibit 4.2, File No. 1-3672 |
| 4.99 | Ameren Ameren Illinois | Third Supplemental Indenture to the Ameren Illinois Indenture dated as of May 15, 2012 | Exhibit 4.83, File No. 333-182258 |
| 4.100 | Ameren Ameren Illinois | Fourth Supplemental Indenture to the Ameren Illinois Indenture, dated as of October 15, 2019 | September 30, 2019 Form 10-Q, Exhibit 4.4, File No. 1-3672 |
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| 4.101 | AmerenAmeren Illinois | Ameren Illinois Indenture Company Order dated December 10, 2013, establishing the 4.80% Senior Secured Notes due 2043 (including the global note) | December 10, 2013 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-3672 |
| 4.102 | AmerenAmeren Illinois | Ameren Illinois Indenture Company Order dated June 30, 2014, establishing the 4.30% Senior Secured Notes due 2044 (including the global note) | June 30, 2014 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-3672 |
| 4.103 | AmerenAmeren Illinois | Ameren Illinois Indenture Company Order dated December 14, 2015, establishing the 4.15% Senior Secured Notes due 2046 (including the global note) | December 14, 2015 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-3672 |
| 4.104 | AmerenAmeren Illinois | Ameren Illinois Indenture Company Order dated December 6, 2016, requesting the authentication of an additional $240,000,000 aggregate principal amount of 4.15% Senior Secured Notes due 2046 (including the global note) | December 6, 2016 Form 8-K, Exhibits 4.2 and 4.3, File No. 1-3672 |
| 4.105 | AmerenAmeren Illinois | Ameren Illinois Indenture Company Order dated October 30, 2019, establishing Senior Notes Series CILCO-AA (including the global note) | September 30, 2019 Form 10-Q, Exhibits 4.5 and 4.6, File No. 1-3672 |
| 4.108 | Ameren Illinois | Description of Ameren Illinois Securities | 2021 Form 10-K, Exhibit 4.100, File No. 1-14756 |
| Material Contracts | |||
|---|---|---|---|
| 10.1 | Ameren Companies | Fourth Amended Ameren Corporation System Utility Money Pool Agreement, as amended January 30, 2014 | June 30, 2015 Form 10-Q, Exhibit 10.1, File No. 1-14756 |
| 10.2 | AmerenAmeren Missouri | Amended and Restated Credit Agreement, dated as of December 10, 2025, by and among Ameren, Ameren Missouri and JP Morgan Chase Bank, N.A., as agent, and the lenders party thereto | December 10, 2025 Form 8-K, Exhibit 10.1, File No. 1-2967 |
| 10.3 | AmerenAmeren Illinois | Amended and Restated Credit Agreement, dated as of December 10, 2025, by and among Ameren, Ameren Illinois and JP Morgan Chase Bank, N.A., as agent, and the lenders party thereto | December 10, 2025 Form 8-K, Exhibit 10.2, File No. 1-3672 |
| 10.4 | Ameren | Forward Sale Agreement, dated May 12, 2025, between Ameren and Goldman Sachs & Co. LLC, as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.1, File No. 1-14756 |
| 10.5 | Ameren | Forward Sale Agreement, dated May 12, 2025, between Ameren and JPMorgan Chase Bank, National Association, as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.2, File No. 1-14756 |
| 10.6 | Ameren | Forward Sale Agreement, dated May 12, 2025, between Ameren and Barclays Bank PLC. as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.3, File No. 1-14756 |
| 10.7 | Ameren | Forward Sale Agreement, dated May 12, 2025, between Ameren and Wells Fargo Bank, National Association, as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.4, File No. 1-14756 |
| 10.8 | Ameren | Additional Forward Sale Agreement, dated May 13, 2025, between Ameren and Goldman Sachs & Co. LLC, as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.5, File No. 1-14756 |
| 10.9 | Ameren | Additional Forward Sale Agreement, dated May 13, 2025, between Ameren and JPMorgan Chase Bank, National Association, as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.6, File No. 1-14756 |
| 10.10 | Ameren | Additional Forward Sale Agreement, dated May 13, 2025, between Ameren and Barclays Bank PLC. as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.7, File No. 1-14756 |
| 10.11 | Ameren | Additional Forward Sale Agreement, dated May 13, 2025, between Ameren and Wells Fargo Bank, National Association, as a Forward Purchaser | May 12, 2025 Form 8-K, Exhibit 10.8, File No. 1-14756 |
| 10.12 | Ameren | *Summary Sheet of Ameren Corporation Non-Management Director Compensation effective as of January 1, 2022 | 2021 Form 10-K, Exhibit 10.6, File No. 1-14756 |
| 10.13 | Ameren | *Ameren’s Deferred Compensation Plan for Members of the Board of Directors amended and restated effective January 1, 2009, dated June 13, 2008 | June 30, 2008 Form 10-Q, Exhibit 10.3, File No. 1-14756 |
| 10.14 | Ameren | *Amendment dated October 12, 2009, to Ameren’s Deferred Compensation Plan for Members of the Board of Directors, effective January 1, 2010 | 2009 Form 10-K, Exhibit 10.15, File No. 1-14756 |
| 10.15 | Ameren | *Amendment dated October 14, 2010, to Ameren’s Deferred Compensation Plan for Members of the Board of Directors | 2010 Form 10-K, Exhibit 10.15, File No. 1-14756 |
| 10.16 | Ameren | *Ameren Deferred Compensation Plan as amended and restated effective January 1, 2023 | 2023 Form 10-K, Exhibit 10.10, File No. 1-14756 |
| 10.20 | Ameren Companies | *2026 Ameren Short-Term Incentive Plan | |
| 10.21 | Ameren Companies | *2025 Base Salary Table for Named Executive Officers | 2024 Form 10-K, Exhibit 10.19, File No. 1-14756 |
| 10.22 | Ameren Companies | *2026 Base Salary Table for Named Executive Officers | |
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| 10.23 | Ameren Companies | *Second Amended and Restated Ameren Corporation Change of Control Severance Plan | 2008 Form 10-K, Exhibit 10.37, File No. 1-14756 |
| 10.24 | Ameren Companies | *First Amendment dated October 12, 2009, to the Second Amended and Restated Ameren Change of Control Severance Plan | October 14, 2009 Form 8-K, Exhibit 10.2, File No. 1-14756 |
| 10.25 | Ameren Companies | *Revised Schedule I to Second Amended and Restated Ameren Change of Control Severance Plan, as amended | |
| 10.26 | Ameren Companies | *Formula for Determining 2023 Target Performance Share Unit and Restricted Stock Unit Awards to be Issued to Named Executive Officers | 2022 Form 10-K, Exhibit 10.31, File No. 1-14756 |
| 10.27 | Ameren Companies | *Formula for Determining 2024 Target Performance Share Unit and Restricted Stock Unit Awards to be Issued to Named Executive Officers | 2023 Form 10-K, Exhibit 10.29, File No. 1-14756 |
| 10.28 | Ameren Companies | *Formula for Determining 2025 Target Performance Share Unit and Restricted Stock Unit Awards to be Issued to Named Executive Officers | 2024 Form 10-K, Exhibit 10.29, File No. 1-14756 |
| 10.29 | Ameren Companies | *Formula for Determining 2026 Target Performance Share Unit and Restricted Stock Unit Awards to be Issued to Named Executive Officers | |
| 10.30 | Ameren Companies | *Ameren Corporation 2022 Omnibus Incentive Compensation Plan | May 13, 2022 Form 8-K, Exhibit 10.1, File No. 1-14756 |
| 10.31 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Relative Total Shareholder Return metric) for awards issued in 2023 pursuant to 2022 Omnibus Incentive Compensation Plan | 2022 Form 10-K, Exhibit 10.45, File No. 1-14756 |
| 10.32 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Clean Energy Transition metric) for awards issued in 2023 pursuant to 2022 Omnibus Incentive Compensation Plan | 2022 Form 10-K, Exhibit 10.46, File No. 1-14756 |
| 10.33 | Ameren Companies | *Form of Restrictive Stock Unit Award Agreement for awards issued in 2023 pursuant to 2022 Omnibus Incentive Compensation Plan | 2022 Form 10-K, Exhibit 10.47, File No. 1-14756 |
| 10.34 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Relative Total Shareholder Return metric) for awards issued in 2024 pursuant to 2022 Omnibus Incentive Compensation Plan | 2023 Form 10-K, Exhibit 10.45, File No. 1-14756 |
| 10.35 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Clean Energy Transition metric) for awards issued in 2024 pursuant to 2022 Omnibus Incentive Compensation Plan | 2023 Form 10-K, Exhibit 10.46, File No. 1-14756 |
| 10.36 | Ameren Companies | *Form of Restrictive Stock Unit Award Agreement for awards issued in 2024 pursuant to 2022 Omnibus Incentive Compensation Plan | 2023 Form 10-K, Exhibit 10.47, File No. 1-14756 |
| 10.37 | Ameren Companies | *Performance-Based Restricted Share Unit Award Agreement, dated as of November 1, 2023, between Ameren and Michael L. Moehn | 2023 Form 10-K, Exhibit 10.48, File No. 1-14756 |
| 10.38 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Relative Total Shareholder Return metric) for awards issued in 2025 pursuant to 2022 Omnibus Incentive Compensation Plan | 2024 Form 10-K, Exhibit 10.47, File No. 1-14756 |
| 10.39 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Clean Energy Transition metric) for awards issued in 2025 pursuant to 2022 Omnibus Incentive Compensation Plan | 2024 Form 10-K, Exhibit 10.48, File No. 1-14756 |
| 10.40 | Ameren Companies | “Form of Restrictive Stock Unit Award Agreement for awards issued in 2025 pursuant to 2022 Omnibus Incentive Compensation Plan | 2024 Form 10-K, Exhibit 10.49, File No. 1-14756 |
| 10.41 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Relative Total Shareholder Return metric) for awards issued in 2026 pursuant to 2022 Omnibus Incentive Compensation Plan | |
| 10.42 | Ameren Companies | *Form of Performance Share Unit Award Agreement (Energy Resource Development metric) for awards issued in 2026 pursuant to 2022 Omnibus Incentive Compensation Plan | |
| 10.43 | Ameren Companies | *Form of Restrictive Stock Unit Award Agreement for awards issued in 2026 pursuant to 2022 Omnibus Incentive Compensation Plan | |
| 10.44 | Ameren Companies | *Special Restricted Stock Unit Award Agreement, dated as of October 9, 2025, between Ameren and Theresa A. Shaw | |
| 10.45 | Ameren Companies | *Bonus Agreement, dated as of November 13, 2025, between Ameren Services and David M. Feinberg | |
| 10.46 | Ameren Companies | *Restricted Stock Unit Award Agreement, dated as of November 13, 2025, between Ameren and David M. Feinberg | |
| 10.47 | Ameren Companies | *Ameren Corporation Severance Plan for Ameren Officers, effective January 1, 2026 | |
| 10.48 | Ameren Companies | *Ameren Supplemental Retirement Plan, amended and restated effective January 1, 2008, dated June 13, 2008 | June 30, 2008 Form 10-Q, Exhibit 10.1, File No. 1-14756 |
| 10.49 | Ameren Companies | *First Amendment to amended and restated Ameren Supplemental Retirement Plan, dated October 24, 2008 | 2008 Form 10-K, Exhibit 10.44, File No. 1-14756 |
| 10.50 | Ameren Companies | *Second Amendment to amended and restated Ameren Supplemental Retirement Plan, dated November 27, 2013 | 2023 Form 10-K, Exhibit 10.52, File No. 1-14756 |
| 10.51 | Ameren Companies | *Third Amendment to amended and restated Ameren Supplemental Retirement Plan, dated January 5, 2015 | 2023 Form 10-K, Exhibit 10.53, File No. 1-14756 |
| Exhibit Designation | Registrant(s) | Nature of Exhibit | Previously Filed as Exhibit to: |
| 10.52 | Ameren Companies | *Fourth Amendment to amended and restated Ameren Supplemental Retirement Plan, dated November 3, 2015 | 2023 Form 10-K, Exhibit 10.54, File No. 1-14756 |
| 10.53 | Ameren Companies | *Fifth Amendment to amended and restated Ameren Supplemental Retirement Plan, dated October 13, 2023 | 2023 Form 10-K, Exhibit 10.55, File No. 1-14756 |
| Insider Trading Policies and Procedures | |||
|---|---|---|---|
| Subsidiaries of the Registrant | |||
| 21.1 | Ameren Companies | Subsidiaries of Ameren | |
| Consent of Experts and Counsel | |||
| 23.1 | Ameren | Consent of Independent Registered Public Accounting Firm with respect to Ameren | |
| 23.2 | Ameren Missouri | Consent of Independent Registered Public Accounting Firm with respect to Ameren Missouri | |
| 23.3 | Ameren Illinois | Consent of Independent Registered Public Accounting Firm with respect to Ameren Illinois | |
| Power of Attorney | |||
| 24.1 | Ameren | Powers of Attorney with respect to Ameren | |
| 24.2 | Ameren Missouri | Powers of Attorney with respect to Ameren Missouri | |
| 24.3 | Ameren Illinois | Powers of Attorney with respect to Ameren Illinois | |
| Rule 13a-14(a)/15d-14(a) Certifications | |||
| 31.1 | Ameren | Rule 13a-14(a)/15d-14(a) Certification of Principal Executive Officer of Ameren | |
| 31.2 | Ameren | Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer of Ameren | |
| 31.3 | Ameren Missouri | Rule 13a-14(a)/15d-14(a) Certification of Principal Executive Officer of Ameren Missouri | |
| 31.4 | Ameren Missouri | Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer of Ameren Missouri | |
| 31.5 | Ameren Illinois | Rule 13a-14(a)/15d-14(a) Certification of Principal Executive Officer of Ameren Illinois | |
| 31.6 | Ameren Illinois | Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer of Ameren Illinois | |
| Section 1350 Certifications | |||
| 32.1 | Ameren | Section 1350 Certification of Principal Executive Officer and Principal Financial Officer of Ameren | |
| 32.2 | Ameren Missouri | Section 1350 Certification of Principal Executive Officer and Principal Financial Officer of Ameren Missouri | |
| 32.3 | Ameren Illinois | Section 1350 Certification of Principal Executive Officer and Principal Financial Officer of Ameren Illinois | |
| Policy Relating to Recovery of Erroneously Awarded Compensation | |||
| 97.1 | Ameren Companies | Ameren Corporation Financial Restatement Compensation Recoupment Policy, as adopted August 10, 2023 | 2023 Form 10-K, Exhibit 97.1, File No. 1-14756 |
| Additional Exhibits | |||
| 99.1 | Ameren Companies | Amended and Restated Tax Allocation Agreement, dated as of December 22, 2022 | 2022 Form 10-K, Exhibit 99.1, File No. 1-14756 |
| Interactive Data Files | |||
| 101.INS | Ameren Companies | Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document | |
| 101.SCH | Ameren Companies | XBRL Taxonomy Extension Schema Document | |
| 101.CAL | Ameren Companies | XBRL Taxonomy Extension Calculation Linkbase Document | |
| 101.LAB | Ameren Companies | XBRL Taxonomy Extension Label Linkbase Document | |
| 101.PRE | Ameren Companies | XBRL Taxonomy Extension Presentation Linkbase Document | |
| 101.DEF | Ameren Companies | XBRL Taxonomy Extension Definition Document | |
| 104 | Ameren Companies | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) | |
The file number references for the Ameren Companies’ filings with the SEC are: Ameren, 1-14756; Ameren Missouri, 1-2967; and Ameren Illinois, 1-3672.
*Compensatory plan or arrangement.
Each registrant hereby undertakes to furnish to the SEC upon request a copy of any long-term debt instrument not listed above that such registrant has not filed as an exhibit pursuant to the exemption provided by Item 601(b)(4)(iii)(A) of Regulation S-K.
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.