Shareholder Vote

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 21, 2011 Commission File Number Exact Name of Registrant as Specified in Charter; State of Incorporation; Address and Telephone Number IRS Employer Identification Number 1-14756 Ameren Corporation (Missouri Corporation) 1901 Chouteau Avenue St. Louis, Missouri 63103 (314) 621-3222 43-1723446 1-2967 Union Electric Company (Missouri Corporation) 1901 Chouteau Avenue St. Louis, Missouri 63103 (314) 621-3222 43-0559760 1-3672 Ameren Illinois Company (Illinois Corporation) 300 Liberty Street Peoria, Illinois 61602 (309) 677-5271 37-0211380 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 5.07 Submission of Matters to a Vote of Security Holders. At the annual meeting of shareholders of each of Ameren Corporation (“Ameren” or the “Company”), Union Electric Company d/b/a Ameren Missouri (“Ameren Missouri”) and Ameren Illinois Company d/b/a Ameren Illinois (“Ameren Illinois”) held on April 21, 2011 (each, its respective “Annual Meeting”), the matters listed below were submitted to a vote of its respective shareholders. Item (1): Election of Directors Ameren Ameren shareholders elected the ten nominees named in the definitive proxy statement relating to the Annual Meeting to serve as directors until Ameren’s next annual meeting of shareholders in 2012 and until their respective successors have been duly elected and qualified. Information as to the vote on each director standing for election is provided below: Name Votes For Votes Withheld Abstentions Broker Non-Votes Stephen F. Brauer 158,415,674 2,632,091 — 37,879,875 Ellen M. Fitzsimmons 158,475,695 2,572,070 — 37,879,875 Walter J. Galvin 151,460,089 9,587,676 — 37,879,875 Gayle P. W. Jackson 158,430,924 2,616,841 — 37,879,875 James C. Johnson 155,886,996 5,160,769 — 37,879,875 Steven H. Lipstein 155,842,454 5,205,311 — 37,879,875 Patrick T. Stokes 155,701,986 5,345,779 — 37,879,875 Thomas R. Voss 155,844,160 5,203,605 — 37,879,875 Stephen R. Wilson 158,428,587 2,619,178 — 37,879,875 Jack D. Woodard 155,919,423 5,128,342 — 37,879,875 Ameren Missouri At Ameren Missouri’s annual meeting of shareholders held on April 21, 2011, the following individuals (comprising Ameren Missouri’s full Board of Directors) were elected to serve until the next annual meeting of shareholders in 2012: Warner L. Baxter, Daniel F. Cole, Adam C. Heflin, Martin J. Lyons, Jr., Richard J. Mark, Charles D. Naslund and Gregory L. Nelson. Each individual received 102,123,834 votes for election and no withheld votes, abstentions or broker non-votes. Ameren Illinois At Ameren Illinois’ annual meeting of shareholders held on April 21, 2011, the following individuals (comprising Ameren Illinois’ full Board of Directors) were elected to serve until the next annual meeting of shareholders in 2012: Scott A. Cisel, Daniel F. Cole, Martin J. Lyons, Jr. and Gregory L. Nelson. Each individual received 26,068,696 votes for election and no withheld votes, abstentions or broker non-votes. Item (2): Amendment to Restated Articles of Incorporation Regarding Liability of Directors Ameren shareholders approved amending Ameren’s Restated Articles of Incorporation to limit, in certain circumstances, the personal liability of Ameren directors, as set forth below: Votes For Votes Against Abstentions Broker Non-Votes 161,071,325 35,910,379 1,945,936 — Item (3): Re-Approval of the Material Terms of the Performance Goals under Ameren’s 2006 Omnibus Incentive Compensation Plan Ameren shareholders re-approved the material terms of the performance goals under Ameren’s 2006 Omnibus Incentive Compensation Plan, as set forth below: Votes For Votes Against Abstentions Broker Non-Votes 144,340,330 15,002,023 1,705,412 37,879,875 Item (4): Advisory Approval of Executive Compensation Ameren shareholders approved, on an advisory basis, the compensation of certain executives as disclosed in the Compensation Discussion and Analysis, the compensation tables and other narrative executive compensation disclosures in the definitive proxy statement relating to the Annual Meeting, as set forth below: Votes For Votes Against Abstentions Broker Non-Votes 147,480,743 11,436,407 2,130,615 37,879,875 Item (5): Advisory Approval on Frequency of Executive Compensation Shareholder Advisory Vote Ameren shareholders approved, on an advisory basis, the holding of a shareholder advisory vote on executive compensation every year, as set forth below: Every Year Every Two Years Every Three Years Abstentions Broker Non-Votes 135,167,078 2,508,072 21,291,780 2,080,835 37,879,875 Based on these voting results, and consistent with the recommendation of Ameren’s Board of Directors, the Board has determined that Ameren will hold a shareholder advisory vote on the compensation of the Company’s named executive officers, as set forth in the Company’s proxy statement, every year until the Board decides to hold the next shareholder advisory vote on the frequency of such executive compensation advisory votes. Item (6): Ratification of the Appointment of Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2011 Ameren shareholders ratified the appointment of PricewaterhouseCoopers LLP as Ameren’s independent registered public accounting firm for the fiscal year ending December 31, 2011, as set forth below: Votes For Votes Against Abstentions Broker Non-Votes 194,050,196 3,701,289 1,176,155 — Item (7): Shareholder Proposal Relating to Report on Coal Combustion Waste Ameren shareholders did not approve a shareholder proposal requesting that Ameren’s Board of Directors prepare a report on coal combustion waste as described in the definitive proxy statement relating to the Annual Meeting, as set forth below: Votes For Votes Against Abstentions Broker Non-Votes 74,950,082 67,241,677 18,856,006 37,879,875 Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit Number: Title: 3(i) Certificate of Amendment to the Restated Articles of Incorporation filed with the Secretary of State of the State of Missouri on April 21, 2011. S IGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. The signature for each undersigned company shall be deemed to relate only to matters having reference to such company or its subsidiaries. A MEREN C ORPORATION (Registrant) /s/ Martin J. Lyons, Jr. Martin J. Lyons, Jr. Senior Vice President and Chief Financial Officer U NION E LECTRIC C OMPANY (Registrant) /s/ Martin J. Lyons, Jr. Martin J. Lyons, Jr. Senior Vice President and Chief Financial Officer A MEREN I LLINOIS C OMPANY (Registrant) /s/ Martin J. Lyons, Jr. Martin J. Lyons, Jr. Senior Vice President and Chief Financial Officer Date: April 21, 2011 E XHIBIT I NDEX Exhibit Number: Title: 3(i) Certificate of Amendment to the Restated Articles of Incorporation filed with the Secretary of State of the State of Missouri on April 21, 2011.