As Of | Filing | | Doc. | | Page | | Title | Docs. |
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| | | |
10/13/23 | | S-3ASR | | | | 1 | | About this Prospectus | 3 |
5/24/23 | | 424B2 | | | | 1 | | About This Prospectus Supplement | 2 |
2/29/24 | | 10-K | | | | 1 | | Accounting Matters | 1 |
| | | | | | 1 | | Ameren Corporation | 5 |
| | | | | | 1 | | Ameren Illinois | 1 |
11/9/23 | | 10-Q | | | | 1 | | Ameren Illinois Company | 6 |
4/5/24 | | DEF 14C | | | | 1 | | Audit and Risk Committee Report | 1 |
2/29/24 | | 10-K | | | | 1 | | Available Information | 1 |
11/9/23 | | 10-Q | | | | 1 | | Balance Sheet | 3 |
4/5/24 | | DEF 14C | | | | 1 | | Board Committees | 1 |
10/13/23 | | S-3ASR | | | | 1 | | Book-Entry System | 3 |
2/29/24 | | 10-K | | | | 1 | | Business | 1 |
| | | | | | 1 | | Business Segments | 1 |
| | | | | | 1 | | Callaway Energy Center | 4 |
5/24/23 | | 424B2 | | | | 1 | | Capitalization | 2 |
2/29/24 | | 10-K | | | | 1 | | Certain Relationships and Related Transactions and Director Independence | 1 |
5/24/23 | | 424B2 | | | | 1 | | Certain United States Federal Income Tax Consequences | 2 |
2/29/24 | | 10-K | | | | 1 | | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure | 1 |
| | | | | | 1 | | Commitments and Contingencies | 4 |
4/5/24 | | DEF 14C | | | | 1 | | Compensation Discussion and Analysis | 1 |
| | | | | | 1 | | Compensation Tables and Narrative Disclosures | 1 |
11/9/23 | | 10-Q | | | | 1 | | Consolidated Balance Sheet | 3 |
| | | | | | 1 | | Consolidated Statement of Cash Flows | 3 |
| | | | | | 1 | | Consolidated Statement of Income and Comprehensive Income | 3 |
| | | | | | 1 | | Consolidated Statement of Shareholders' Equity | 3 |
2/29/24 | | 10-K | | | | 1 | | Controls and Procedures | 4 |
4/5/24 | | DEF 14C | | | | 1 | | Corporate Governance | 1 |
| | | | | | 1 | | Corporate Governance Policies and Processes | 1 |
2/29/24 | | 10-K | | | | 1 | | Customer Energy-Efficiency Programs | 1 |
| | | | | | 1 | | Cybersecurity | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Delinquent Section 16(a) Reports | 1 |
5/24/23 | | 424B2 | | | | 1 | | Description of Bonds | 2 |
10/13/23 | | S-3ASR | | | | 1 | | Description of Common Stock | 1 |
| | | | | | 1 | | Description of Debt Securities | 1 |
| | | | | | 1 | | Description of First Mortgage Bonds and Mortgage Indenture | 3 |
| | | | | | 1 | | Description of Preferred Stock | 3 |
| | | | | | 1 | | Description of Senior Secured Debt Securities | 3 |
| | | | | | 1 | | Description of Senior Unsecured Debt Securities | 3 |
| | | | | | 1 | | Description of Stock Purchase Contracts and Stock Purchase Units | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Director Compensation | 1 |
2/29/24 | | 10-K | | | | 1 | | Directors, Executive Officers, and Corporate Governance | 1 |
| | | | | | 1 | | Disclosure Regarding Foreign Jurisdictions that Prevent Inspections | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Election of Directors | 1 |
2/29/24 | | 10-K | | | | 1 | | Executive Compensation | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Executive Compensation Matters | 1 |
2/29/24 | | 10-K | | | | 1 | | Exhibit Index | 1 |
11/9/23 | | 10-Q | | | | 1 | | Exhibits | 3 |
2/29/24 | | 10-K | | | | 1 | | Exhibits and Financial Statement Schedules | 1 |
10/13/23 | | S-3ASR | | | | 1 | | Experts | 3 |
4/5/24 | | DEF 14C | | | | 1 | | Fees for Fiscal Years 2023 and 2022 | 1 |
11/9/23 | | 10-Q | | | | 1 | | Financial Statements (Unaudited) | 3 |
2/29/24 | | 10-K | | | | 1 | | Financial Statements and Supplementary Data | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Fiscal Year 2023 | 1 |
| | | | | | 1 | | Fiscal Year 2024 | 1 |
| | | | | | 1 | | Form 10-K | 1 |
2/29/24 | | 10-K | | | | 1 | | Form 10-K Summary | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Forward-Looking Information | 1 |
2/29/24 | | 10-K | | | | 1 | | Forward-Looking Statements | 4 |
| | | | | | 1 | | General | 1 |
| | | | | | 1 | | Glossary of Terms and Abbreviations | 4 |
| | | | | | 1 | | Human Capital Management | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Human Resources Committee Report | 1 |
2/29/24 | | 10-K | | | | 1 | | Industry Issues | 1 |
| | | | | | 1 | | Information about Our Executive Officers | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Information Concerning Nominees to the Board of Directors | 1 |
10/13/23 | | S-3ASR | | | | 1 | | Legal Matters | 3 |
2/29/24 | | 10-K | | | | 1 | | Legal Proceedings | 4 |
| | | | | | 1 | | Liquidity and Capital Resources | 1 |
| | | | | | 1 | | Management's Discussion and Analysis of Financial Condition and Results of Operations | 4 |
| | | | | | 1 | | Market for Registrants' Common Equity, Related Stockholder Matters, and Issuer Purchase | 1 |
| | | | | | 1 | | Mine Safety Disclosures | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Narrative Disclosure to Summary Compensation Table and Grants of Plan-Based Awards Table | 1 |
2/29/24 | | 10-K | | | | 1 | | Natural Gas Supply for Distribution | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Nonqualified Deferred Compensation | 1 |
2/29/24 | | 10-K | | | | 1 | | Note 1. Summary of Significant Accounting Policies | 4 |
11/9/23 | | 10-Q | | | | 1 | | Note 10. Callaway Energy Center | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 10. Retirement Benefits | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 11. Retirement Benefits | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 11. Stock-based Compensation | 1 |
| | | | | | 1 | | Note 12. Income Taxes | 4 |
| | | | | | 1 | | Note 13. Related-party Transactions | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 13. Supplemental Information | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 14. Commitments and Contingencies | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 14. Segment Information | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 15. Supplemental Information | 1 |
| | | | | | 1 | | Note 16. Segment Information | 1 |
| | | | | | 1 | | Note 2. Rate and Regulatory Matters | 4 |
| | | | | | 1 | | Note 3. Property, Plant, and Equipment, Net | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 3. Short-term Debt and Liquidity | 3 |
| | | | | | 1 | | Note 4. Long-term Debt and Equity Financings | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 4. Short-term Debt and Liquidity | 1 |
| | | | | | 1 | | Note 5. Long-term Debt and Equity Financings | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 5. Other Income, Net | 3 |
| | | | | | 1 | | Note 6. Derivative Financial Instruments | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 6. Other Income, Net | 1 |
| | | | | | 1 | | Note 7. Derivative Financial Instruments | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 7. Fair Value Measurements | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 8. Fair Value Measurements | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 8. Related-party Transactions | 3 |
2/29/24 | | 10-K | | | | 1 | | Note 9. Callaway Energy Center | 1 |
11/9/23 | | 10-Q | | | | 1 | | Note 9. Commitments and Contingencies | 3 |
2/29/24 | | 10-K | | | | 1 | | Of Conten | 1 |
| | | | | | 1 | | Of Equity Securities | 1 |
| | | | | | 1 | | Operating Statistics | 1 |
| | | | | | 1 | | Other Information | 3 |
4/5/24 | | DEF 14C | | | | 1 | | Other Matters | 1 |
2/29/24 | | 10-K | | | | 1 | | Outlook | 1 |
| | | | | | 1 | | Overview | 1 |
| | | | | | 1 | | Part I | 1 |
11/9/23 | | 10-Q | | | | 1 | | Part I. Financial Information | 3 |
2/29/24 | | 10-K | | | | 1 | | Part Ii | 1 |
11/9/23 | | 10-Q | | | | 1 | | Part II. Other Information | 3 |
2/29/24 | | 10-K | | | | 1 | | Part Iii | 1 |
| | | | | | 1 | | Part Iv | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Pay vs. Performance | 1 |
| | | | | | 1 | | Pension Benefits | 1 |
10/13/23 | | S-3ASR | | | | 1 | | Plan of Distribution | 3 |
4/5/24 | | DEF 14C | | | | 1 | | Policy Regarding the Pre-Approval of Independent Registered Public Accounting Firm Provision of Audit, Audit-Related and Non-Audit Services | 1 |
| | | | | | 1 | | Potential Payments Upon Termination or Change of Control | 1 |
2/29/24 | | 10-K | | | | 1 | | Power Generation | 1 |
| | | | | | 1 | | Principal Accountant Fees and Services | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Principal Executive Officer Pay Ratio | 1 |
2/29/24 | | 10-K | | | | 1 | | Properties | 1 |
| | | | | | 1 | | Quantitative and Qualitative Disclosures About Market Risk | 4 |
4/5/24 | | DEF 14C | | | | 1 | | Question and Answers about the Annual Meeting and Voting | 1 |
2/29/24 | | 10-K | | | | 1 | | Rate and Regulatory Matters | 4 |
| | | | | | 1 | | Rates and Regulation | 1 |
| | | | | | 1 | | Regulatory Matters | 1 |
| | | | | | 1 | | Renewable Energy and Zero Emission Standards | 1 |
| | | | | | 1 | | Reserved | 1 |
| | | | | | 1 | | Results of Operations | 1 |
| | | | | | 1 | | Risk Factors | 7 |
5/24/23 | | 424B2 | | | | 1 | | S-1 | 2 |
| | | | | | 1 | | S-12 | 2 |
| | | | | | 1 | | S-16 | 2 |
| | | | | | 1 | | S-2 | 2 |
5/23/23 | | 424B3 | | | | 1 | | S-20 | 1 |
5/24/23 | | 424B2 | | | | 1 | | S-21 | 2 |
| | | | | | 1 | | S-3 | 2 |
| | | | | | 1 | | S-4 | 2 |
| | | | | | 1 | | S-5 | 2 |
| | | | | | 1 | | S-6 | 2 |
4/5/24 | | DEF 14C | | | | 1 | | Securities of Ameren | 1 |
| | | | | | 1 | | Securities of the Company | 1 |
| | | | | | 1 | | Security Ownership | 1 |
2/29/24 | | 10-K | | | | 1 | | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Selection of Independent Registered Public Accounting Firm | 1 |
10/13/23 | | S-3ASR | | | | 1 | | Selling Securityholders | 3 |
4/5/24 | | DEF 14C | | | | 1 | | Shareholder Proposals | 1 |
2/29/24 | | 10-K | | | | 1 | | Signatures | 4 |
11/9/23 | | 10-Q | | | | 1 | | Statement of Cash Flows | 3 |
| | | | | | 1 | | Statement of Income | 3 |
| | | | | | 1 | | Statement of Shareholders' Equity | 3 |
4/5/24 | | DEF 14C | | | | 1 | | Stock Ownership Requirement for Named Executive Officers and Members of the Senior Leadership Team | 1 |
2/29/24 | | 10-K | | | | 1 | | Supply of Electric Power | 1 |
| | | | | | 1 | | Table | 1 |
4/5/24 | | DEF 14C | | | | 1 | | Table of Contents | 7 |
2/29/24 | | 10-K | | | | 1 | | Transmission | 1 |
5/24/23 | | 424B2 | | | | 1 | | Underwriting | 2 |
2/29/24 | | 10-K | | | | 1 | | Union Electric | 1 |
11/9/23 | | 10-Q | | | | 1 | | Union Electric Company | 4 |
| | | | | | 1 | | Unregistered Sales of Equity Securities | 1 |
8/3/23 | | 10-Q | | | | 1 | | Unregistered Sales of Equity Securities and Use of Proceeds | 2 |
2/29/24 | | 10-K | | | | 1 | | Unresolved Staff Comments | 1 |
11/9/23 | | 10-Q | | | | 1 | | Use of Proceeds | 4 |
10/13/23 | | S-3ASR | | | | 1 | | Where You Can Find More Information | 3 |
2/29/24 | | 10-K | | | | 1 | | 100 | 1 |
| | | | | | 1 | | 105 | 1 |
| | | | | | 1 | | 116 | 1 |
| | | | | | 1 | | 117 | 1 |
| | | | | | 1 | | 120 | 1 |
| | | | | | 1 | | 127 | 1 |
| | | | | | 1 | | 130 | 1 |
| | | | | | 1 | | 133 | 1 |
| | | | | | 1 | | 136 | 1 |
| | | | | | 1 | | 142 | 1 |
| | | | | | 1 | | 144 | 1 |
| | | | | | 1 | | 147 | 1 |
| | | | | | 1 | | 150 | 1 |
| | | | | | 1 | | 153 | 1 |
| | | | | | 1 | | 156 | 1 |
| | | | | | 1 | | 160 | 1 |
| | | | | | 1 | | 161 | 1 |
| | | | | | 1 | | 162 | 1 |
| | | | | | 1 | | 163 | 1 |
| | | | | | 1 | | 164 | 1 |
| | | | | | 1 | | 165 | 1 |
| | | | | | 1 | | 166 | 1 |
| | | | | | 1 | | 167 | 1 |
| | | | | | 1 | | 169 | 1 |
| | | | | | 1 | | 170 | 1 |
| | | | | | 1 | | 177 | 1 |