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): December 1012, 2014

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) 6 Executive Drive Collinsville, Illinois 62234 (618) 343-8150	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~~Item 85.0103 ~~Other~~Amendments ~~Events~~to Articles of Incorporation or Bylaws; Change in Fiscal Year.

On December 1012, 2014, ~~Ameren~~the ~~Illinois~~Bylaws of Union Electric Company, doing business as Ameren Missouri (“Ameren ~~Illinois~~ Missouri”), a subsidiary of Ameren Corporation (“Ameren”), ~~issued~~were ~~and~~amended ~~sold~~by ~~$300,000,000~~action ~~principal~~by ~~amount~~unanimous written consent of ~~its~~Ameren Missouri’s ~~3.25%~~Board ~~Senior~~of ~~Secured~~Directors. ~~Notes~~The ~~due~~amendments ~~2025~~eliminate (the ~~“Notes”),~~separate ~~pursuant~~title toof aChief ~~Registration~~Executive ~~Statement~~Officer onat ~~Form~~Ameren ~~S-3 (File No~~Missouri. ~~333-182258-01),~~ ~~which~~Michael ~~became~~L. ~~effective~~Moehn onwill ~~June 21,~~continue ~~2012, and a Prospectus Supplement dated December 3, 2014~~ to aserve ~~Prospectus~~as ~~dated~~President ~~June 21,~~of ~~2012.~~ Ameren ~~Illinois~~Missouri ~~received~~and ~~net~~will ~~offering~~have ~~proceeds~~the ofsame ~~approximately~~duties and responsibilities ~~$297.9 million,~~as before ~~expenses, upon~~ the ~~closing~~elimination of the ~~transaction.~~title ~~Ameren Illinois intends to use the net offering proceeds to repay a portion~~ of ~~its~~Chief ~~short-term~~Executive ~~debt~~Officer.

~~Ameren~~A ~~Illinois~~complete iscopy ~~filing~~of ~~this~~the ~~Current~~Ameren ~~Report~~Missouri onBylaws, ~~Form~~as ~~8-K~~amended, tois ~~report~~ included as ~~exhibits~~Exhibit ~~certain documents in connection with the offering of the Notes~~3.1.

~~ITEM~~On 9December 12, 2014, the Bylaws of Ameren Illinois Company (“Ameren Illinois”), a subsidiary of Ameren, were amended by action by unanimous written consent of Ameren Illinois’ Board of Directors.01 ~~Financial~~The ~~Statements~~amendments eliminate the separate title of Chief Executive Officer at Ameren Illinois. Richard J. Mark will continue to serve as President of Ameren Illinois and ~~Exhibits~~will have the same duties and responsibilities as before the elimination of the title of Chief Executive Officer.

A complete copy of the Ameren Illinois Bylaws, as amended, is included as Exhibit 3.2.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number		Title
1		Underwriting Agreement, dated December 3, 2014, between Ameren Illinois and the several underwriters named therein, for whom BNP Paribas Securities Corp., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and TD Securities (USA) LLC are acting as representatives.
3.1		Bylaws of Union Electric Company, as amended December 12, 2014
*4.1		Indenture, dated as of June 1, 2006, between Ameren Illinois and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to the Notes (Current Report on Form 8-K filed on June 19, 2006, Exhibit 4.4, File No. 1-3004).
3.2		Bylaws of Ameren Illinois Company, as amended December 12, 2014
4.2		Company Order establishing the Notes.
4.3		Global Note.
*4.4		General Mortgage Indenture and Deed of Trust, dated as of November 1, 1992, from Ameren Illinois to The Bank of New York Mellon Trust Company, N.A., as successor trustee (Annual Report on Form 10-K for the year ended December 31, 1992, Exhibit 4(cc), File No. 1-3004).
4.5		Supplemental Indenture, dated as of December 1, 2014, by and between Ameren Illinois and The Bank of New York Mellon Trust Company, N.A., as successor trustee, relating to the First Mortgage Bonds, Senior Notes Series HH securing the Notes.
5.1		Opinion of Craig W. Stensland, Esq., Senior Corporate Counsel of Ameren Services Company, regarding the legality of the Notes (including consent).
5.2		Opinion of Morgan, Lewis & Bockius LLP regarding the legality of the Notes (including consent).

*This ~~Incorporated~~combined Form 8-K is being filed separately by ~~reference~~Union Electric Company and Ameren Illinois Company. Information contained herein relating to any individual registrant has been filed by such registrant on its own behalf. No registrant makes any representation as ~~indicated~~to information relating to any other registrant.

This combined Form 8-K is being filed separately by Ameren Corporation and Ameren Illinois Company (each a “registrant”). Information contained herein relating to any individual registrant has been filed by such registrant on its own behalf. No registrant makes any representation as to information relating to any other registrant.

SIGNATURES

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.

~~AMEREN~~UNION ~~CORPORATION~~ELECTRIC COMPANY (Registrant) By: /s/ Martin J. Lyons, Jr. Name: Martin J. Lyons, Jr. Title: Executive Vice President and Chief Financial Officer AMEREN ILLINOIS COMPANY (Registrant) By: /s/ Martin J. Lyons, Jr. Name: Martin J. Lyons, Jr. Title: Executive Vice President and Chief Financial Officer

Date: December 1018, 2014

Exhibit Index

Exhibit Number		Title
1		Underwriting Agreement, dated December 3, 2014, between Ameren Illinois and the several underwriters named therein, for whom BNP Paribas Securities Corp., J.P. Morgan Securities LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated and TD Securities (USA) LLC are acting as representatives.
3.1		Bylaws of Union Electric Company, as amended December 12, 2014
4.2		Company Order establishing the Notes.
3.2		Bylaws of Ameren Illinois Company, as amended December 12, 2014
4.3		Global Note.
4.5		Supplemental Indenture, dated as of December 1, 2014, by and between Ameren Illinois and The Bank of New York Mellon Trust Company, N.A., as successor trustee, relating to the First Mortgage Bonds, Senior Notes Series HH securing the Notes.
5.1		Opinion of Craig W. Stensland, Esq., Senior Corporate Counsel of Ameren Services Company, regarding the legality of the Notes (including consent).
5.2		Opinion of Morgan, Lewis & Bockius LLP regarding the legality of the Notes (including consent).

Filing Compare · Ameren Illinois Co