UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14C INFORMATION

Information Statement Pursuant to Section 14(c) of the

Securities Exchange Act of 1934

(Amendment No.          )

Check the appropriate box:
☐	Preliminary Information Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14c-5(d)(2))
☐	Definitive Information Statement
☒	Definitive Additional Materials

Ameren Illinois Company

(Name of Registrant as Specified in its Charter)

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☐	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
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Important Notice Regarding the Availability of Materials

AMEREN ILLINOIS COMPANY

6 EXECUTIVE DRIVE

COLLINSVILLE, IL 62234

Meeting Information

Meeting Type:          Annual Meeting

For holders as of:     February 27, 2017

Date: April 27, 2017       Time: 10:30 a.m. CDT

Location:   St. Louis Art Museum

    One Fine Arts Drive

    Forest Park

    St. Louis, Missouri 63110

You are receiving this communication because you hold securities in the company listed above. They have released informational materials that are now available for your review. This notice provides instructions on how to access AMEREN ILLINOIS COMPANY materials for informational purposes only. We are not asking you for a proxy and you are requested not to send us a proxy.

You may view the materials online at www.materialnotice.com and easily request a paper or e-mail copy (see reverse side).

  See the reverse side for instructions on how to access materials.

— How to Access the Materials —

Materials Available to VIEW or RECEIVE:

ANNUAL REPORT                     INFORMATION STATEMENT

How to View Online:

Have the information that is printed in the box marked by the arrow (located on the following page) and visit: www.materialnotice.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these materials, 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.materialnotice.com

2) BY TELEPHONE:         1-800-579-1639

3) BY E-MAIL*:                sendmaterial@materialnotice.com

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Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor.

THIS NOTICE WILL ENABLE YOU TO ACCESS

MATERIALS FOR INFORMATIONAL PURPOSES ONLY

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