UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
___________________________________________
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934
(Amendment No.      )
___________________________________________

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Filed by a party other than the Registrant   

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☐ Preliminary Proxy Statement
☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐ Definitive Proxy Statement
☒ Definitive Additional Materials
☐ Soliciting Material Pursuant to § 240.14a-12

Ameren Corporation
(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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*** Exercise Your Right to Vote ***
Important Notice Regarding the Availability of Proxy Materials for the
Shareholder Meeting to Be Held on May 2, 2019.



AMEREN CORPORATION
1901 CHOUTEAU AVENUE
ST. LOUIS, MO 63103

Meeting Information
Meeting Type:       Annual Meeting
For holders as of: March 4, 2019
Date: May 2, 2019 Time:     10:00 a.m. CDT
Location:    St. Louis Art Museum
                    One Fine Arts Drive
                    St. Louis, Missouri 63110

You are receiving this communication because you hold shares in the company named above.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com, scan the QR Barcode on the reverse side, or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.























Before You Vote
How to Access the Proxy Materials
Proxy Materials Available to VIEW or RECEIVE:
NOTICE AND PROXY STATEMENT             ANNUAL REPORT
How to View Online:
Have the information that is printed in the box marked by the arrow ➔ XXXX XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote.com, or scan the QR Barcode below.
How to Request and Receive a PAPER or E-MAIL Copy:
If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy.
Please choose one of the following methods to make your request:
1) BY INTERNET:        www.proxyvote.com
2) BY TELEPHONE: 1-800-579-1639 
3) BY E-MAIL*: sendmaterial@proxyvote.com
* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow ➔ XXXX XXXX XXXX XXXX (located on the following page) in the subject line.
Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor.
Please make the request as instructed above on or before April 18, 2019 to facilitate timely delivery.

How To Vote
Please Choose One of the Following Voting Methods
      
SCAN TO
VIEW MATERIALS & VOTE

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.
Vote By Internet: Go to www.proxyvote.com or from a smartphone, scan the QR Barcode above. Have the information that is printed in the box marked by the arrow ➔ XXXX XXXX XXXX XXXX (located on the following page) available and follow the instructions.
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.





















Voting Items
The Board of Directors recommends you vote FOR the following:
ITEM 1
ELECTION OF DIRECTORS—NOMINEES FOR DIRECTOR
1a. WARNER L. BAXTER                                                              
1b. CATHERINE S. BRUNE
1c. J. EDWARD COLEMAN
1d. WARD H. DICKSON
1e. NOELLE K. EDER
1f. ELLEN M. FITZSIMMONS
1g. RAFAEL FLORES
1h. RICHARD J. HARSHMAN
1i. CRAIG S. IVEY
1j. JAMES C. JOHNSON
1k. STEVEN H. LIPSTEIN
1l. STEPHEN R. WILSON



The Board of Directors recommends you vote FOR the following proposals:

ITEM 2 –  ADVISORY APPROVAL OF COMPENSATION OF THE NAMED EXECUTIVE OFFICERS DISCLOSED IN THE PROXY STATEMENT.
ITEM 3 – RATIFICATION OF THE APPOINTMENT OF PRICEWATERHOUSECOOPERS LLP AS INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR THE FISCAL YEAR ENDING DECEMBER 31, 2019.

NOTE: In their discretion, the proxies are authorized to vote on such other business as may properly come before the meeting or any adjournment thereof.