OMB APPROVAL

OMB Number:3235-0059
Expires:January 31, 2008
Estimated average burden
hours per response
14

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.     )

(Amendment No.)

Filed by the Registrantx   Filed by a Party other than the Registrant¨

Check the appropriate box:

¨
 Filed by the Registrant   x
Filed by a Party other than the Registrant   o
Check the appropriate box:

oPreliminary Proxy Statement

¨ oConfidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

x   Definitive Proxy Statement

¨ oDefinitive Additional Materials

¨ oSoliciting 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)

      

Payment of Filing Fee (Check the appropriate box):

x   No fee required.

¨ oFee computed on table below per Exchange Act Rules 14a-6(i)(4)(1) and 0-11.

 (1)       1) Title of each class of securities to which transaction applies:

 
(2)       2) Aggregate number of securities to which transaction applies:

 
(3)       3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

 
(4)       4) Proposed maximum aggregate value of transaction:

 
(5)       5) Total fee paid:

 

¨o   Fee paid previously with preliminary materials.

¨
 oCheck 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.

 (1)       1) Amount Previously Paid:

 
(2)       2) Form, Schedule or Registration Statement No.:


(3) Filing Party:


(4) Date Filed:



LOGO

NOTICE OF ANNUAL MEETING OF

SHAREHOLDERS AND PROXY STATEMENT OF

AMEREN CORPORATION

      3) Filing Party:

      4) Date Filed:


SEC 1913 (02-02)Persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.


(AMEREN LOGO)
Notice of Annual Meeting of Shareholders
and Proxy Statement of Ameren Corporation
Time and Date:

 

9:00 A.M.

Tuesday

May 2, 2006

Place:

 

Tuesday

April 24, 2007
Place:The Saint Louis Art Museum

Forest Park

One Fine Arts Drive

St. Louis, Missouri

(Free parking will be available)

IMPORTANT

Important
If you plan to attend the annual meeting of shareholders, please advise the Company in your proxy vote (by telephone or the Internet or by checking the appropriate box on the proxy card) and bring the Admission Ticket on the bottomreverse side of your proxy instruction card. Persons without tickets will be admitted to the meeting upon verification of their shareholdings in the Company. If your shares are held in the name of your broker, bank or other nominee, you must bring an account statement or letter from the nominee indicating that you were the beneficial owner of the shares on March 6, 2006,2007, the record date for voting. Please note that cameras and other recording devices will not be allowed in the meeting.

Please vote by proxy (via telephone or the Internet or the enclosed proxy card) even if you own only a few shares. If you attend the meeting and want to change your proxy vote, you can do so by voting in person at the meeting.


AMEREN CORPORATION

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

To the Shareholders of

AMEREN CORPORATION

We will hold the Annual Meeting of Shareholders of Ameren Corporation at The Saint Louis Art Museum, Forest Park, One Fine Arts Drive, St. Louis, Missouri, on Tuesday, May 2, 2006,April 24, 2007, at 9:00 A.M., for the purposes of

(1)electing 11 Directors of the Company for terms ending at the 2007 annual meeting of shareholders;

(2)approving the adoption of the 2006 Omnibus Incentive Compensation Plan;

(3)ratifying the appointment of independent auditors for the fiscal year ending December 31, 2006;

(4)considering a shareholder proposal requesting an evaluation of a 20-year extension of the Callaway Nuclear Plant operating license, if presented at the meeting; and

(5)acting on other proper business presented to the meeting.

(1) electing 12 Directors of the Company for terms ending at the 2008 annual meeting of shareholders;
(2) ratifying the appointment of independent registered public accountants for the fiscal year ending December 31, 2007;
(3) considering a shareholder proposal relating to releases from the Callaway Plant, if presented at the meeting; and
(4) acting on other proper business presented to the meeting.
The Board of Directors of the Company presently knows of no other business to come before the meeting.

If you owned shares of the Company’s Common Stock at the close of business on March 6, 2006,2007, you are entitled to vote at the meeting and at any adjournment thereof. All shareholders are requested to be present at the meeting in person or by proxy so that a quorum may be assured.

You may vote via telephone or the Internet or, if you prefer, you may sign and return the enclosed proxy card in the enclosed envelope. Your prompt vote by proxy will reduce expenses. Instructions for voting by telephone or the Internet are included with this mailing. If you attend the meeting, you may revoke your proxy by voting in person.

By order of the Board of Directors.

STEVEN R. SULLIVAN

-s- Steve Sullivan
Secretary

St. Louis, Missouri

March 15, 200613, 2007


TABLE OF CONTENTS

ITEM


 PAGE

Section
Page
 1

 1

 1

1
 2

 3

 3

 3

 3

 3

 4

 4

 4

 8

Item (2): Approval of the 2006 Omnibus Incentive Compensation Plan

16

Item (3): Ratification of the Appointment of Independent Auditors for the Fiscal Year Ending December 31, 2006

24

Item (4): Shareholder Proposal Requesting an Evaluation of a 20-Year Extension of the Callaway Nuclear Plant Operating License

24

Item (5): Other Matters

26

Security Ownership

27

Security Ownership of More Than 5 Percent Shareholders

27

Security Ownership of Management

28

Stock Ownership Guideline for Officers

28

Section 16(a) Beneficial Ownership Reporting Compliance

29

Executive Compensation

29

Ameren Corporation Human Resources Committee Report on Executive Compensation

29

 3110

 3213

 3318

 3521

21
23
24
24
25
26
26
27
27
27
 36

36

ChangeNarrative Disclosure to Summary Compensation Table and Grants of Control Severance PlanPlan-Based Awards Table

36

Deferred Compensation Plans

37

Audit Committee Report

 38

 3940

 3942

43
49
50
50
 4050

 4051

 4051

 4051

 Appendix A

2006 Omnibus Incentive Compensation Plan

Appendix B

i


PROXY STATEMENT OF AMEREN CORPORATION

(First sent or given to shareholders on or about March 15, 2006)13, 2007)

Principal Executive Offices:

One Ameren Plaza

1901 Chouteau Avenue, St. Louis, MO 63103

FORWARD-LOOKING INFORMATION
Statements in this proxy statement not based on historical facts are considered “forward-looking” and, accordingly, involve risks and uncertainties that could cause actual results to differ materially from those discussed. Although such forward-looking statements have been made in good faith and are based on reasonable assumptions, there is no assurance that the expected results will be achieved. These statements include (without limitation) statements as to future expectations, beliefs, plans, strategies, objectives, events, conditions, and financial performance. These statements are intended to constitute “forward looking” statements in connection with the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. Ameren Corporation (the “Company,” “Ameren,” “we,” “us” and “our”) is providing this cautionary statement to disclose that there are important factors that could cause actual results to differ materially from those anticipated. Reference is made to our Annual Report onForm 10-K for the year ended December 31, 2006 (the “2006Form 10-K”) filed with the Securities and Exchange Commission (the “SEC”) for a list of such factors.
INFORMATION ABOUT THE ANNUAL SHAREHOLDERS MEETING

This solicitation of proxies is made by theour Board of Directors of Ameren Corporation (the “Company” or “Ameren”) for the Annual Meeting of Shareholders of the Company to be held on Tuesday, May 2, 2006April 24, 2007 (the “Annual Meeting”), and at any adjournment thereof. TheOur Annual Meeting will be held at The Saint Louis Art Museum, Forest Park, One Fine Arts Drive, St. Louis, Missouri, at 9:00 A.M. Central Time.

The Company is

We are a holding company, the principal first tier subsidiaries of which are Union Electric Company, doing business as AmerenUE (“UE”), Central Illinois Public Service Company, doing business as AmerenCIPS (“CIPS”), CILCORP Inc. (“CILCORP”), Illinois Power Company, doing business as AmerenIP (“IP”), Ameren Services Company (“Ameren Services”), Ameren Energy Resources Company (“AER”) and Ameren Energy, Inc. (“AE”). CILCORP is the parent company of Central Illinois Light Company, doing business as AmerenCILCO (“CILCO”). AER is the parent company of Ameren Energy Generating Company (“AEG”).

VOTING

Who Can Vote

The accompanying proxy card represents all shares registered in the name(s) shown thereon, including shares in the Company’sour dividend reinvestment and stock purchase plan (DRPlus Plan). Participants in, the Savings Investment Plans of Ameren and its subsidiaries (401(k) Plans) and, the Ameren Corporation Long-Term Incentive Plan of 1998 will receive separate proxies for shares in such plans.

and the Ameren Corporation 2006 Omnibus Incentive Compensation Plan.

Only shareholders of the Company’sour Common Stock of record at the close of business on the Record Date, March 6, 2006,2007, are entitled to vote at the Annual Meeting. In order to conduct the Annual Meeting, holders of more than one-half of the outstanding shares entitled to vote must be present in person or represented by proxy so that there is a quorum. A quorum consists of a majority of the outstanding shares entitled to vote, present or represented by proxy. The voting securities of the Company on March 6, 2006,2007, consisted of 204,881,293206,684,858 shares of Common Stock. Each share of Common Stock is entitled to one vote. It is important that you vote promptly so that your shares are counted toward the quorum.


In determining whether a quorum is present at the Annual Meeting, shares represented by a proxy which directs that the shares abstain from voting or that a vote be withheld on a matter and broker non-votes (described below), shall be deemed to be represented at the meeting for quorum purposes. Shares as to which voting instructions are given as to at least one of the matters to be voted on shall also be deemed to be so represented. If the proxy states how shares will be voted in the absence of instructions by the shareholder, such shares shall be deemed to be represented at the meeting.

The New York Stock Exchange (“NYSE”) permits brokers to vote their customers’ shares on routine matters when the brokers have not received voting instructions from their customers. The election of directors and the ratification of the appointment of independent registered public accountants are examples of routine matters on which brokers may vote in this way. Brokers may not vote their customers’ shares on non-routine matters such as shareholder proposals unless they have received voting instructions from their customers. Non-voted shares on non-routine matters are called broker non-votes.
In all matters, including the election of directors, every decision of a majority of the shares entitled to vote on the subject matter and represented in person or by proxy at the meeting at which a quorum

is present shall be valid as an act of the shareholders. In tabulating the number of votes on such matters (i) shares represented by a proxy which directs that the shares abstain from voting or that a vote be withheld on a matter shall be deemed to be represented at the meeting as to such matter, (ii) broker non-votes shall not be deemed to be represented at the meeting for the purpose of the vote on such matter or matters, (iii) except as provided in (iii)(iv) below, shares represented by a proxy as to which voting instructions are not given as to one or more matters to be voted on shall not be deemed to be represented at the meeting for the purpose of the vote as to such matter or matters, and (iii)(iv) a proxy which states how shares will be voted in the absence of instructions by the shareholder as to any matter shall be deemed to give voting instructions as to such matter. Shareholder votes are certified by independent inspectors of election.

The Board of Directors has adopted a confidential voting policy for proxies. This policy does not prohibit disclosure where it is required by applicable law.

How You Can Vote

By Proxy.  Before the Annual Meeting, you can give a proxy to vote your shares of the Company’s Common Stock in one of the following ways:

 - by calling the toll-free telephone number;

 -by using the Internet (http:(http://www.ameren.com)www.proxyvote.com); or

 - by completing and signing the enclosed proxy card and mailing it in time to be received before the Annual Meeting.

The telephone and Internet voting procedures are designed to confirm your identity and to allow you to give your voting instructions. If you wish to vote by telephone or the Internet, please follow the instructions on your proxy card. Additional instructions will be provided on the telephone message and website. Please have your proxy card at hand when voting.

If you mail us your properly completed and signed proxy card, or vote by telephone or the Internet, your shares of the Company’sour Common Stock will be voted according to the choices that you specify. If you sign and mail your proxy card without marking any choices, your proxy will be voted as recommended by the Board FOR the Board’s nominees for director Item (1), FOR approving the 2006 Omnibus Incentive Compensation Plan Item (2), FOR ratifying the appointment of the independent auditorsregistered public accountants Item (3)(2), AGAINST the shareholder proposal Item (4)(3), and in the discretion of the named proxies upon such other matters as may properly come before the meeting.

If you hold any shares in the Savings Investment Plans of Ameren and its subsidiaries, your completed proxy card or telephone or Internet proxy vote will serve as voting instructions to the plan trustee. However, your voting instructions must be received at least five days prior to the Annual Meeting in order to count. In accordance with the terms of the plans, the trustee will vote all of the shares held in the plans in the same proportion as the actual proxy votes submitted by plan participants.


2


If you have shares registered in the name of a bank, broker, or other registered owner or nominee, you should receive instructions from that registered owner about how to instruct them to vote those shares.

In Person.  You may come to the Annual Meeting and cast your vote there. Only shareholders of record at the close of business on the Record Date, March 6, 2006,2007, are entitled to vote at the Annual Meeting.

How You Can Revoke Your Proxy

You may revoke your proxy at any time after you give it and before it is voted by entering a new vote by telephone or the Internet or by delivering either a written revocation or a signed proxy bearing a later date to the Secretary of the Company or by voting in person at the Annual Meeting. To revoke a proxy by telephone or the Internet, you must do so by 11:59 P.M. CentralEastern Time on April 30, 200620, 2007 (following the directions on the proxy card). Attendance at the Annual Meeting will not cause your previously granted proxy to be revoked unless you specifically so request.

OTHER ANNUAL MEETING MATTERS

How You Can Obtain Materials Forfor the Annual Meeting

This proxy statement and the accompanying proxy card are first being mailed to shareholders on or about March 15, 2006.13, 2007. In the same package with this proxy material, you should have received a copy of the Company’s 2005 Summary Annual Report to Shareholders and its Annual Report to the Securities and Exchange Commission (the “SEC”) on our 2006Form 10-K, for the year ended December 31, 2005 (the “2005 Form 10-K”), including consolidated financial statements. When you receive this package, if all of these materials are not included, please contact us and a copy of any missing material will be sent at no expense to you.

You may reach us:

-by mail addressed to

- by mail addressed to
Office of the Secretary

Ameren Corporation

P.O. Box 66149, Mail Code 1370

St. Louis, MO63166-6149

-
by calling toll free 1-800-255-2237 (or in the St. Louis area 314-554-3502).

1-800-255-2237 (or in the St. Louis area314-554-3502).

How You Can Review the List of Shareholders

The names of shareholders of record entitled to vote at the Annual Meeting will be available at the Annual Meeting and, for 10 days prior to the Annual Meeting, at the Office of the Secretary of the Company.

Webcast of the Annual Meeting

The Annual Meeting will also be webcast on May 2, 2006.April 24, 2007. You are invited to visithttp://www.ameren.com at 9:00 A.M. CT on May 2, 2006,April 24, 2007, to hear the webcast of the Annual Meeting. On theour home page, you will click on “Live Webcast Annual Meeting May 2, 2006,April 24, 2007, 9:00 A.M. CT,” then the appropriate audio link. The webcast will remain on the Company’sour website for one year. You cannot record your vote on this webcast.


3


ITEMS YOU MAY VOTE ON

Item (1):  Election of Directors

Eleven

Twelve directors are to be elected at the Annual Meeting to serve until the next annual meeting of shareholders and until their respective successors have been duly elected and qualified. In the absence of instructions to the contrary, executed proxies will be voted in favor of the election of the persons listed below. In the event that any nominee for election as director should become unavailable to serve, votes will be cast, pursuant to the enclosed proxy card, for such substitute nominee or nominees as may be nominated by the Nominating and Corporate Governance Committee of the Board of Directors and approved by the Board of Directors. The Company’s Board of Directors is currently comprised of 11 members. A vacancy on the Board was created by the death of Paul L. Miller, Jr. in July 2005. The Board of Directors has decided not to fill the vacancy created by Mr. Miller’s death at this time. The Board of Directors knows of no reason why any nominee will not be able to serve as director. The 1112 nominees for director who receive the vote of at least a majority of the shares entitled to vote in the election of directors and represented in person or by proxy at the meeting at which a quorum is present will be elected. Shareholders may not cumulate votes in the election of directors. In the event any nominee for re-election fails to obtain the required majority vote, such nominee will tender his or her resignation as a director for consideration by the Nominating and Corporate Governance Committee of the Board of Directors. The Nominating and Corporate Governance Committee will evaluate the best interests of the Company and its shareholders and will recommend to the Board the action to be taken with respect to any such tendered resignation.

Our Board of Directors is currently comprised of 13 members. Consistent with our By-Laws, the Board’s membership was increased from 11 with the Board’s election of Mr. Jack D. Woodard effective in August 2006 and of Stephen F. Brauer effective in October 2006. In accordance with the director retirement age provisions of the Company’s Corporate Governance Policy, Gordon R. Lohman and Richard A. Lumpkin, each of whom is currently serving as a director, each offered his resignation from our Board of Directors, effective April 24, 2007, the end of his term as a director. The Board accepted Mr. Lumpkin’s resignation as a director effective April 24, 2007. We thank Mr. Lumpkin for his service, contributions and leadership throughout his tenure as a director. The Board declined Mr. Lohman’s offer to resign and, as described below, nominated him for re-election to the Board. As a result of the foregoing, the size of the Board of Directors will be reduced to 12 members effective as of the Annual Meeting.
Mr. Lumpkin has served as Chairman of the Board of Directors of Consolidated Communications Holdings, Inc., a telecommunications holding company, since a July 2005 reorganization as part of an initial public offering. Prior to the reorganization, Mr. Lumpkin had served as Chairman of Consolidated Communications, Inc., since January 1, 2003, upon the acquisition of the former Illinois Consolidated Telephone Company from McLeodUSA Incorporated. Prior to the acquisition, Mr. Lumpkin had served as President of Illinois Consolidated Telephone Company since 1977 and also Chairman and Chief Executive Officer since 1990. As a result of a September 1997 merger, he also had served as Vice Chairman of McLeodUSA Incorporated until April 2002.
Information Concerning Nominees to the Board of Directors

The nominees for theour Board of Directors of the Company are listed below, along with their age as of December 31, 2005,2006, tenure as director and business background for at least the last five years. Each nominee has consented to being nominated for director and has agreed to serve if elected. No arrangement or understanding exists between any nominee and the Company or, to the Company’s knowledge, any other person or persons pursuant to which any nominee was or is to be selected as a director or nominee. All of the nominees are currently directors of the Company and have been previously elected by the Company’s shareholders at prior annual meetings.meetings, except that Jack D. Woodard was elected a director by the Board on August 25, 2006 and Stephen F. Brauer was elected a director by the Board on October 13, 2006. Mr. Woodard was recommended to the Board by a non-management director and Mr. Brauer was recommended to the Board by a third party search firm. There are no family relationships between any director, executive officer, or person nominated or chosen by the Company to become a director or executive officer except that Charles W. Mueller is the father of Michael G. Mueller, who is an executive officer of certain Company subsidiaries. See “Corporate‘‘Corporate Governance – Certain Relationships — Policy and Procedures With Respect to Related Person Transactions” below for further


4


information on this family relationship and certain other reportable family relationships with employees of the Company who are not executive officers. All of the nominees for election to the Board were unanimously recommended by the Nominating and Corporate Governance Committee of the Board of Directors and were unanimously nominated by the Board of Directors.

  
LOGO
(PHOTO OF STEPHEN F. BRAUER)
 

SUSANStephen F. Brauer
Chairman and Chief Executive Officer of Hunter Engineering Company,
a privately held firm that engages in the design, manufacture and sale of computer-based automotive service equipment worldwide. Mr. Brauer joined Hunter Engineering in 1971, became Chief Operating Officer in 1978 and Chief Executive Officer in 1980. In 2001, Mr. Brauer took a leave of absence from Hunter Engineering to become the United States ambassador to Belgium, serving two and one-half years in that capacity before returning to Hunter Engineering in 2003. Director of the Company since October 2006.
Age: 61.

(PHOTO OF SUSAN S. ELLIOTT)
Susan S. ELLIOTTElliott

Chairman and Co-Chief Executive Officer of Systems Service Enterprises,
Inc.,
a privately held information technology firm. Ms. Elliott founded Systems
Service Enterprises, Inc. in 1966. Director of the Company since 2003.
Ms. Elliott is a past Chairman of the Federal Reserve Bank of St. Louis. Other
directorships: Angelica Corporation.

Age: 68.

69.

  
LOGO
(PHOTO OF GAYLE P. W. JACKSON)
 

GAYLEGayle P. W. JACKSON,Jackson, Ph.D.

President of Energy Global, Inc.,a consulting firm which specializes in corporate development, diversification and government relations strategies for energy companies. From 2002 to 2004, Dr. Jackson served as Managing Director of FE Clean Energy Group, a global private equity management firm that invests in energy companies and projects in Central and Eastern Europe, Latin America and Asia. From 1985 to 2001, Dr. Jackson was President of a consulting firm that advised energy companies on corporate development and diversification strategies and national and international governmental institutions on energy policy. From 1985 to 1995, she was Chief of Staff of the Coal Industry Advisory Board, which was established by the Paris-based International Energy Agency to obtain expert advice from industry executives on strategies for reducing dependence on oil. From 1978 to 1985, she held corporate planning, business development and international sales and marketing positions at Peabody Holding Company, Inc. Dr. Jackson is a past Deputy Chairman of the Federal Reserve Bank of St. Louis. Director of the Company since February 2005. Other directorships: Atlas Pipeline Partners, L.P.


Age: 59.

60.
  
LOGO
(PHOTO OF JAMES C. JOHNSON)
 

JAMESJames C. JOHNSONJohnson

Vice President, Corporate Secretary and Assistant General Counsel of The Boeing Company,an aerospace and defense firm. Mr. Johnson joined The Boeing Company in May 1998 and has served in his current position since December 2003. Prior to joining The Boeing Company, Mr. Johnson served as Vice President, Secretary and Assistant General Counsel of Northrop Grumman Corporation from 1988 to 1998.

Director of the Company since 2005. Other directorships: Hanesbrands Inc.
Age: 53.

54.


5


  
LOGO
(PHOTO OF RICHARD A. LIDDY)
 

RICHARDRichard A. LIDDYLiddy

Retired Chairman of GenAmerica Financial Corporation,which provides life, pension, annuity and related insurance products and services. Mr. Liddy served as Chairman of the Board of GenAmerica Financial and its predecessor companies from September 2000May 1992 to April 2002. He also served as Chairman of the Board of Reinsurance Group of America from May 1993 to April 2002. Mr. Liddy was also President of GenAmerica Financial from May 1988 to September 2000 and Chief Executive Officer of General American Life Insurance Company from May 1992 to September 2000. In January 2000, while Mr. Liddy served as President of GenAmerica Financial Corporation, GenAmerica sold its mutual holding company to Metropolitan Life Insurance Company. At the request of the Missouri State Insurance Department, a receiver was appointed in order to oversee the equitable distribution of proceeds to policyholders. Director of the Company since 1997. Director of CILCORP, an Ameren subsidiary. Other directorships: Brown Shoe Company, Inc.; Ralcorp Holdings Inc.; Energizer Holdings, Inc.


Age: 70.

71.
  
LOGO
(PHOTO OF GORDON R. LOHMAN)
 

GORDONGordon R. LOHMANLohman

Retired Chairman and Chief Executive Officer of AMSTED Industries Incorporated, Chicago, Illinois,a manufacturer of railroad, construction, and general industrial products. Mr. Lohman was elected President of AMSTED Industries in 1988 and became Chief Executive Officer in 1990 and Chairman in 1997. He retired in 1999. Director of the Company since 1997. Other directorships: Acco Brands Corporation; Fortune Brands, Inc.


Age: 71.

72.

  
LOGO

RICHARD A. LUMPKIN

Chairman of Consolidated Communications Holdings, Inc., a telecommunications holding company. Mr. Lumpkin assumed his present position as Chairman of Consolidated Communications Holdings, Inc. upon completion of a corporate reorganization in July 2005 as part of an initial public offering. Prior to the reorganization, Mr. Lumpkin had served as Chairman of Consolidated Communications, Inc., since January 1, 2003 upon the acquisition of the former Illinois Consolidated Telephone Company from McLeodUSA Incorporated. Prior to the acquisition, Mr. Lumpkin had served as President of Illinois Consolidated Telephone Company since 1977 and also Chairman and Chief Executive Officer since 1990. As a result of a September 1997 merger, he also had served as Vice Chairman of McLeodUSA Incorporated until April 2002. In order to complete a recapitalization, McLeodUSA Incorporated filed, in January 2002, a pre-negotiated plan of reorganization through a Chapter 11 bankruptcy petition filed in the United States Bankruptcy Court for the District of Delaware. In April 2002, McLeodUSA Incorporated’s plan of reorganization became effective and it emerged from Chapter 11 protection. Director of the Company since 1997. Other directorships: Consolidated Communications Holdings, Inc.; First Mid-Illinois Bancshares, Inc.; First Mid-Illinois Bank & Trust, N.A.

Age: 70.

 
LOGO
(PHOTO OF CHARLES W. MUELLER)
 

CHARLESCharles W. MUELLERMueller

Retired Chairman and Chief Executive Officer of the Company, UE and Ameren Services and retired Chairman of CILCORP and CILCO. Mr. Mueller began his career with UE in 1961 as an engineer and held various positions with UE and other Ameren subsidiaries during his employment. He was elected President of UE in 1993 and Chief Executive Officer in 1994. Mr. Mueller was elected Chairman, Chief Executive Officer and President of Ameren upon its formation in 1997. He relinquished his position as President of Ameren, UE and Ameren Services in 2001. He was elected Chairman of CILCORP and CILCO in January 2003. Mr. Mueller retired as an officer of Ameren and its subsidiaries on December 31, 2003. Director of the Company since 1997. Mr. Mueller is a past Chairman and former director of the Federal Reserve Bank of St. Louis. Other directorships: Angelica Corporation.


Age: 67.

68.
  
LOGO
(PHOTO OF DOUGLAS R. OBERHELMAN)
 

DOUGLASDouglas R. OBERHELMANOberhelman

Group President of Caterpillar Inc.,a maker of construction and mining
equipment, diesel and natural gas engines and industrial gas turbines.
Mr. Oberhelman joined Caterpillar in 1975. He held a variety of positions,
including senior finance representative based in South America for Caterpillar
Americas Co. and region finance manager and district manager for Caterpillar’s
North American Commercial Division, before his appointment as managing
director and vice general manager of strategic planning at Shin Caterpillar
Mitsubishi Ltd. (Tokyo) in 1991. He was elected a Vice President in 1995 when
he served as Caterpillar’s Chief Financial Officer. In 1998, he accepted
leadership of Caterpillar’s Engine Products Division. Mr. Oberhelman was
elected a Group President in 2001 with responsibility for Caterpillar’s corporate
financial, audit and compliance, and legal divisions. Additionally, his
responsibilities include the world wide operations, sales and marketing for
Caterpillar’s diesel engine and power systems businesses. Director of the
Company since 2003. Other directorships: South Side Bank (in Peoria, Illinois).


Age: 52.

53.

6


  
LOGO
(PHOTO OF GARY L. RAINWATER)
 

GARYGary L. RAINWATERRainwater

Chairman, Chief Executive Officer and President of the Company, UE, CILCORP and Ameren Services and Chairman and Chief Executive Officer of CIPS, CILCOthe Company and IP.CILCORP. Mr. Rainwater began his career with UE in 1979 as an engineer and has held various positions with UE and other Ameren subsidiaries during his employment. He was elected President and Chief Operating Officer of the Company, UE and Ameren Services in 2001. Effective January 1, 2004, Mr. Rainwater was elected to serve as Chairman and Chief Executive Officer of the Company, UE and Ameren Services in addition to his position as President. At that time, he was also elected Chairman of CILCORP and CILCO in addition to his position as Chief Executive Officer and President of those companies which he assumed in 2003. In September 2004, upon Ameren’s acquisition of IP, Mr. Rainwater was elected Chairman, Chief Executive Officer and President of IP. He currently holdsheld the position of Chairman and Chief Executive Officer of CIPS, CILCO and IP after relinquishing his position as President in October 2004. Effective January 2007, Mr. Rainwater relinquished his positions as Chairman, President and Chief Executive Officer of UE and Ameren Services and as Chairman and Chief Executive Officer of CIPS, CILCO and IP. Director of the Company since 2003. Director of the following Ameren subsidiaries: CILCORP; CILCO; UE; CIPS; AEG; IP.


Age: 59.

60.
  
LOGO
(PHOTO OF HARVEY SALIGMAN)
 

HARVEY SALIGMANHarvey Saligman

Partner of Cynwyd Investments,a family real estate partnership. Mr. Saligman has been a partner of Cynwyd Investments since 1996. He also served in various executive capacities in the consumer products industry for more than 35 years. Director of the Company since 1997.


Age: 67.

68.
  

LOGO

(PHOTO OF PATRICK T. STOKES)
 

PATRICKPatrick T. STOKESStokes

President and Chief Executive OfficerChairman of Anheuser-Busch Companies, Inc., athe holding companyand Chairman and Chief Executive Officer parent of Anheuser-Busch, Incorporated, a producer and distributor of beer. Mr. Stokes has served as Chairman of Anheuser-Busch Companies, Inc. since December 2006 and has been affiliated with Anheuser-Busch since 1969, was elected President of Anheuser-Busch, Incorporated in 1990, and has served in his current positions since 2002. From 2000 to 2002, he1969. He served as Senior Executive Vice President of Anheuser-Busch Companies, Inc. from 2000 to 2002 and as President and Chief Executive Officer from 2002 until December 2006. Director of the Company since December 2004. Other directorships: Anheuser-Busch Companies, Inc.; U.S. Bancorp.
Age: 64.

(PHOTO OF JACK D. WOODARD)
Jack D. Woodard
Retired Executive Vice President and Chief Nuclear Officer of Southern Nuclear Operating Company, Inc.
, a subsidiary of The Southern Company, which is a utility holding company. Mr. Woodard joined The Southern Company system in 1971 and in 1988, he was elected Alabama Power’s Vice President of Nuclear, in 1990 he was elected Vice President of Southern Nuclear Operating Company, Inc. and in 1993, Mr. Woodard was elected Executive Vice President and Chief Nuclear Officer of Southern Nuclear Operating Company, Inc. He retired in 2004. Mr. Woodard served as an independent advisor to Ameren’s Board of Directors and to the Board’s Nuclear Oversight Committee from 2005 until his election as a Director. Director of the Company since August 2006.
Age: 63.

7

YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR THE ELECTION OF THESE DIRECTOR NOMINEES.


Your Board of Directors unanimously recommends that you vote for the election of these director nominees.
Board Structure Director Compensation and Corporate Governance

Board Structure

Board and Committee Meetings and Annual Meeting Attendance

During 2005,2006, the Board of Directors met sevennine times. All directors attended or participated in 75 percent or more of the aggregate number of meetings of the Board and the Board Committees of which they were members.

The Company has adopted a policy to encourageunder which Board members are expected to attend the annual meeting of shareholders.each shareholders’ meeting. At the 20052006 annual meeting, all of the then incumbent directors were in attendance.

Age Policy
Directors who attain age 72 prior to the date of an annual meeting cannot be designated asare required to submit a nomineeletter to the Nominating and Corporate Governance Committee offering his or her resignation, effective with the end of the director’s elected term, for election atconsideration by the Committee. The Nominating and Corporate Governance Committee will review the appropriateness of continued service on the Board of Directors by that annual meeting.director and make a recommendation to the Board of Directors and, if applicable, annually thereafter. In addition, the eligibility of a former employees,employee to serve as a director, except for an employee who has been electedserved as Chief Executive Officer of Ameren, UE or CIPS, is limited toceases on the date upon which they retire, resign or otherwise severcease active employment with the respective company.

Board Committees
The Board of Directors has a standing Audit Committee, Executive Committee, Human Resources Committee, Nominating and Corporate Governance Committee, Nuclear Oversight Committee, and Public Policy Committee, the members of which are identified below. The Audit Committee, Human Resources Committee and Nominating and Corporate Governance Committee are comprised entirely of non-management directors, each of whom the Board of Directors has determined to be “independent” as defined by the relevant provisions of the Sarbanes-Oxley Act of 2002, the New York Stock Exchange (“NYSE”)NYSE listing standards and the Company’s Policy Regarding Nominations of Directors.

Directors (the “Director Nomination Policy”).

Audit Committee

Members:

 

Members:Douglas R. Oberhelman, Chairman

 

Richard A. Liddy

  

Stephen F. Brauer

Richard A. Lumpkin
Susan S. Elliott

 

Richard A. Lumpkin

Charter
The general functions ofAudit Committee’s charter is posted on the Company’s website, at http://www.ameren.com/Investors.
The Audit CommitteeCommittee’s Charter provides that the Committee’s duties include: (1) reviewing with management the design and effectiveness of the Company’s system of financial reporting internal controls; (2) reviewing the scope and results of the annual audit and other services performed by the independent auditors;registered public accountants; (3) reviewing and discussing with management and the independent auditorsregistered public accountants the Company’s annual audited financial statements and the disclosures under “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and recommending to the Board the inclusion of such financial statements in the Company’s Annual Report on SECForm 10-K (see “Audit Committee Report”“AUDIT COMMITTEE REPORT” below); (4) reviewing and discussing with management and the independent auditorsregistered public accountants the Company’s quarterly financial statements and the disclosures under “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and authorizing the inclusion of such financial statements in the Company’s Quarterly Reports on SECForm 10-Q; (5) reviewing with management and the independent auditorsregistered public accountants the


8


Company’s earnings press releases; (6) appointing, compensating, overseeing and evaluating the independent auditorsregistered public accountants and pre-approving fees related to audit and other services they perform; (7) reviewing the scope of audits and the annual budget of the Company’s internal auditors; (8) reviewing the appointment of the Company’s internal audit manager, or approving the retention of any third party provider of internal audit services; (9) reviewing the performance of the Company’s internal audit function and ensuring that the Company maintains an internal audit function; and (10) taking other actions as required by the Sarbanes-Oxley Act of 2002

and the NYSE listing standards. The Audit Committee has established a system to enable employees to communicate directly with the members of the Committee about deficiencies in the Company’s accounting, internal controls and financial reporting practices. The Audit Committee held 12nine meetings in 2005.2006. The Board of Directors has determined that each of the members of the Audit Committee is qualified to serve on the Audit Committee in accordance with the criteria specified in rules issued by the SEC and the NYSE. The Board of Directors has determined that Douglas R. Oberhelman qualifies as an “audit committee financial expert” as that term is defined by SEC rules.

The Audit Committee of Ameren Corporation performs its committee functions for all Ameren Corporation subsidiaries which are registered companies pursuant to the Securities Exchange Act of 1934.
Human Resources Committee

Members:

 

Members:Richard A. Liddy, Chairman

 

Harvey Saligman

  

Gordon R. Lohman

 

Patrick T. Stokes

  

Richard A. Lumpkin

  

Charter
The general functions of the Human Resources CommitteeCommittee’s charter is posted on the Company’s website, athttp://www.ameren.com/Investors.
The Human Resources Committee’s Charter provides that the Committee’s duties include: (1) reviewing and approving corporate goals and objectives relevant to compensation of Chief Executive Officers and Presidents of the Company and its subsidiaries, evaluating performance and compensation of these officers in light of such goals and objectives and establishing compensation levels for these officers; (2) overseeing the evaluation of other executive officers of the Company and its subsidiaries and approving the general compensation program and salary structure of such executive officers; (3) administering and approving awards under the Company’s incentive compensation plan; (4) reviewing and approving any executive employment agreements, severance agreements, change in control agreements and determining policy with respect to Section 162(m) of the Internal Revenue Code Section 162(m)of 1986 (the “IRC”); (5) reviewing and (5)discussing with management the Compensation Discussion and Analysis section of the Company’sForm 10-K and proxy statement; (6) preparing an annual report for the Company’sForm 10-K and proxy statement; and (7) acting on important policy matters affecting Company personnel. The Human Resources Committee held six meetings in 2005.2006. See the “Ameren Corporation “EXECUTIVE COMPENSATION —Human Resources Committee Report” below.
The Human Resources Committee of Ameren Corporation performs its committee functions for all Ameren Corporation subsidiaries which are registered companies pursuant to the Securities Exchange Act of 1934.
Governance
The Human Resources Committee focuses on good governance practices in its operation. In 2006, this included:
• considering compensation for the Executives (as defined below) in the context of all of the components of total compensation;
• requiring several meetings to discuss important decisions;
• reviewing tally sheets for the Executives including all components of total compensation packages;


9


• receiving meeting materials several days in advance of meetings;
• conducting executive sessions with Committee members only; and
• obtaining professional advice from an outside compensation consultant engaged directly by the Committee that enabled the Committee to make decisions in the best interests of the Company, and having direct access to the outside compensation consultant.
Delegation of Authority
In 2006, the Human Resources Committee delegated authority to the Human Resources Administrative Committee comprised of designated members of management to approve employee separation packages for certain employees, not including the Executives, under certain circumstances.
Role of Executive Compensation” below.

Officers

The Chief Executive Officer, with input from the Senior Vice President and Chief Human Resources Officer of Ameren Services, recommends to the Committee base salary, target short-term incentive levels, actual short-term incentive payouts and long-term incentive grants for the other Executives. The Human Resources Committee considers, discusses, modifies as appropriate, and takes action on such proposals.
Role of Compensation Consultants
In 2006, the Human Resources Committee directly retained Hewitt Associates (“Hewitt”) as its outside compensation consultant. The Committee informed Hewitt in writing that it expected Hewitt to be frank and upfront with the Committee at all times and to advise the Committee if and when there were elements of management proposals to the Committee that Hewitt believed the Committee should not support.
During 2006, Hewitt assisted the Committee with a comprehensive analysis of market data and its implications for pay at the Company, as well as various other executive compensation issues. Hewitt representatives attended four of the six Committee meetings during 2006.
Human Resources Committee Interlocks and Insider Participation
The current members of the Human Resources Committee of the Board of Directors, Messrs. Liddy, Lohman, Lumpkin, Saligman and Stokes, were not at any time during 2006 or at any other time an officer or employee of the Company, and no member had any relationship with the Company requiring disclosure under applicable SEC rules.
No executive officer of the Company has served on the board of directors or compensation committee of any other entity that has or has had one or more executive officers who served as a member of the Company’s Board of Directors or the Human Resources Committee during 2006.
Nominating and Corporate Governance Committee

Members:

 

Members:Gordon R. Lohman, Chairman

 

Harvey Saligman

  

James C. Johnson

 

Patrick T. Stokes

Charter
The Nominating and Corporate Governance Committee’s charter is posted on the Company’s website, athttp://www.ameren.com/Investors.
The Nominating and Corporate Governance Committee is responsible for the nomination of directors and the Company’s corporate governance practices. More specifically, the Committee is responsible for:Charter provides that the Committee’s duties include: (1) adopting policies and procedures for identifying and evaluating director nominees, including nominees recommended by shareholders; (2) identifying and evaluating individuals qualified to become Board members, considering director candidates recommended by shareholders and recommending that the Board select the director nominees for the next annual meeting of shareholders; (3) reviewing the


10


Board’s policy for director compensation and benefits; (4) establishing a process by which shareholders and other interested persons will be able to communicate with members of the Board; and (5) developing and recommending to the Board corporate governance guidelines applicable to the Company. The Nominating and Corporate Governance Committee also has oversight responsibilities with respect to the Company’s code of business conduct (referred to as its Corporate Compliance Policy) and, its Code of Ethics for Principal Executive and Senior Financial Officers.Officers and its Policy and Procedures With Respect to Related Person Transactions. See “Corporate Governance”“— Corporate Governance below. The Nominating and Corporate Governance Committee held five meetings in 2005.

2006.

The Nominating and Corporate Governance Committee of Ameren Corporation performs its committee functions for all Ameren Corporation subsidiaries which are registered companies pursuant to the Securities Exchange Act of 1934.
Consideration of Director Nominees
The Nominating and Corporate Governance Committee will consider director nominations from shareholders in accordance with the Company’s Director Nomination Policy, Regarding Nominations of Directors, a copy of which is attached hereto as Appendix A. Briefly, the Committee will consider as a candidate any director of the Company who has indicated to the Committee that he or she is willing to stand for re-election as well as any other person who is recommended by any shareholders of the Company

who provide the required information and certifications within the time requirements, as set forth in the Policy Regarding Nominations of Directors.Director Nomination Policy. The Committee may also undertake its own search process for candidates and may retain the services of professional search firms or other third parties to assist in identifying and evaluating potential nominees. The Company paid a third-party search firm a fee to identify or evaluate or assist in identifying or evaluating potential director nominees.

In considering a potential nominee for the Board, shareholders should note that in selecting candidates, the Nominating and Corporate Governance Committee endeavors to find individuals of high integrity who have a solid record of accomplishment in their chosen fields and who display the independence to effectively represent the best interests of all shareholders. Candidates are selected for their ability to exercise good judgment, and to provide practical insights and diverse perspectives. Although the Committee may seek candidates that have different qualities and experiences at different times in order to maximize the aggregate experience, qualities and strengths of the Board members, nominees for each election or appointment of directors will be evaluated using a substantially similar process and under no circumstances will the Committee evaluate nominees recommended by a shareholder of the Company pursuant to a process substantially different than that used for other nominees for the same election or appointment of directors.

The Nominating and Corporate Governance Committee considers the following qualifications at a minimum in recommending to the Board potential new Board members, or the continued service of existing members:
• the highest professional and personal ethics;
• broad experience in business, government, education or technology;
• ability to provide insights and practical wisdom based on their experience and expertise;
• commitment to enhancing shareholder value;
• sufficient time to effectively carry out their duties; their service on other boards of public companies should be limited to a reasonable number;
• compliance with legal and regulatory requirements;
• ability to develop a good working relationship with other Board members and contribute to the Board’s working relationship with senior management of the Company; and


11

the highest professional and personal ethics;

broad experience in business, government, education or technology;

ability to provide insights and practical wisdom based on their experience and expertise;

commitment to enhancing shareholder value;

sufficient time to effectively carry out their duties; their service on other boards of public companies should be limited to a reasonable number;

compliance with legal and regulatory requirements;

ability to develop a good working relationship with other Board members and contribute to the Board’s working relationship with senior management of the Company; and

independence; a majority of the Board shall consist of independent directors, as defined by the Company’s Policy Regarding Nominations of Directors. See “Corporate Governance – Director Independence” below.


• independence; a majority of the Board shall consist of independent directors, as defined by the Company’s Director Nomination Policy. See “— Corporate Governance —Director Independence” below.
Other than the foregoing, there are no stated minimum criteria for director nominees, although the Nominating and Corporate Governance Committee may also consider such other factors as it may deem are in the best interests of the Company and its shareholders. The Nominating and Corporate Governance Committee does, however, believe it appropriate for at least one member of the Board to meet the criteria for an “audit committee financial expert” as defined by SEC rules.

The Board adopted changesCompany’s Corporate Governance Guidelines provide that if a director has a significant change in professional responsibilities, occupation or business association, he or she is required to notify the Nominating and Corporate Governance Committee and offer his or her resignation from the Board. The Nominating and Corporate Governance Committee will evaluate the facts and circumstances and make a recommendation to the Board whether to accept the resignation or request the director to continue to serve on the Board.
The Company’s Director Nomination Policy Regarding Nominations of Directors in August 2005 to requirerequires all directors standing for re-election to agree that in the event any director fails to obtain the required majority vote at an annual meeting of shareholders, such director shallwill tender his or her resignation as a director for consideration by the Nominating and Corporate Governance Committee and recommendation to the Company’s Board.

Public Policy Committee

Members:

 

Members:Charles W. Mueller, Chairman

 

James C. Johnson

  

Stephen F. Brauer

Douglas R. Oberhelman
Gayle P.W. Jackson

 

Douglas R. Oberhelman

Jack D. Woodard

Charter
The Public Policy Committee, formerlyCommittee’s charter is posted on the Contributions Committee, held four meetings in 2005. Company’s website, athttp://www.ameren.com/Investors.
The Public Policy Committee is responsible forCommittee’s Charter provides that the Committee’s duties include reviewing and overseeing the Company’s policies, practices and performance with respect to corporate citizenship and public affairs considerations affecting the Company’s relationship and reputation with its key constituents. It also makes policies and recommendations with respect to charitable and other contributions.

The Public Policy Committee held five meetings in 2006.

Executive Committee

Members:

Richard A. Liddy

Douglas R. Oberhelman

  

Gordon R. Lohman

 

Members:Gary L. Rainwater,

Chairman Charles W. Mueller
Richard A. LiddyDouglas R. Oberhelman
Gordon R. Lohman Harvey Saligman

The Executive Committee has such duties as may be delegated to it from time to time by the Board and has authority to act on most matters concerning management of the Company’s business during intervals between Board meetings. The Executive Committee held threetwo meetings in 2005.

2006.

Nuclear Oversight Committee

Members:

 Charles W. Mueller,
Members:Jack D. Woodard, Chairman Gayle P.W. Jackson
  Susan S. Elliott Charles W. Mueller

Charter
The Nuclear Oversight CommitteeCommittee’s charter is posted on the Company’s website, athttp://www.ameren.com/Investors.


12


The Nuclear Oversight Committee’s Charter provides that the Committee’s duties include providing Board-level oversight of the Company’s nuclear power facility as well as long-term plans and strategies of Ameren’s nuclear power program and makesmaking appropriate reports to the Board. The Nuclear Oversight Committee held fourseven meetings in 2005.

2006.

Executive Sessions of Non-management Directors
The non-management directors meet privately in executive sessions to consider such matters as they deem appropriate, without management being present, as a routinely scheduled agenda item for every Board meeting. An executive session including only independent directors as defined by the NYSE listing standards is held at least once a year. During 2005,2006, all non-management directors were independent, except Charles W. Mueller.Mueller and Jack D. Woodard. Gordon R. Lohman served as Lead Director presiding at such executive sessions during 2005 from the time of his appointment on April 26, 2005.2006. The Lead Director’s duties include convening and chairing meetings of the non-management directors in executive session; convening and chairing meetings of the independent directors in executive session; presiding at all meetings of the Board at which the Chairman is not present, including executive sessions of the non-management directors and independent directors; regularly polling the non-management directors for advice on agenda items for meetings of the Board; serving as a liaison between the Chairman and Chief Executive Officer and the non-management directors; collaborating with the Chairman and Chief Executive Officer in developing the agenda for meetings of the Board and approving such agendas; approving information that is sent to the Board; collaborating with the Chairman and Chief Executive Officer and the chairpersons of the standing committees in developing and managing the schedule of meetings of the Board and approving such schedules; collaborating with the Chairman and Chief Executive Officer in developing the budget of the Board; and if requested by major shareholders, ensuring that he is available for consultation and direct communicationcommunication.
.

Director Compensation

Fees and Stock Awards – In 2005, the compensation for each director who is not an employee of the Company consisted of the following:

A base cash annual retainer of $20,000 payable in 12 equal installments.

An award of 1,000 shares of the Company’s Common Stock provided annually to all directors on or about January 1. An award of 1,000 shares of the Company’s Common Stock is also provided to new directors upon initial election to the Company’s Board.

A fee of $1,500 for each Board meeting attended.

A fee of $1,000 for each Board Committee meeting attended.

An additional annual cash retainer of $10,000 for the Lead Director and for the chairpersons of the Human Resources Committee, the Nominating and Corporate Governance Committee, the Nuclear Oversight Committee, and the Public Policy Committee.

An additional annual cash retainer of $15,000 for the chairperson of the Audit Committee and an additional $5,000 annual cash retainer for each Audit Committee member.

Reimbursement of customary and usual travel expenses.

Directors who are employees of the Company do not receive compensation for their services as a director.

The following table sets forth the compensation paid to non-management directors for fiscal year 2005, other than reimbursement for travel expenses.

            Director             


  Annual
Board/
Committee
Retainer ($)


  Board
Meeting
Fees ($)


  Committee
Meeting
Fees ($)


  All Other
Compensation
($)(1)


  Total ($)

  Stock Awards
(in shares)(2)


S. S. Elliott

  23,340  10,500  16,000  -    49,840  1,000

G. P.W. Jackson

  16,670  9,000  5,000  -    30,670  1,000

J. C. Johnson

  13,336  9,000  7,000  -    29,336  1,000

R. A. Liddy

  31,680  10,500  19,000  22,927  84,107  1,000

G. R. Lohman

  36,672  10,500  13,000  100,747  160,919  1,000

R. A. Lumpkin

  25,000  9,000  15,000  37,962  86,962  1,000

C. W. Mueller

  35,006  10,500  11,000  12,850(3) 69,356  1,000

D. R. Oberhelman

  31,680  10,500  16,000  4,663  62,843  1,000

H. Saligman

  25,000  10,500  14,000  71,758  121,258  1,000

P. T. Stokes

  20,000  9,000  5,000  1,150  35,150  1,000

(1)Consists of earnings on deferred compensation (see “Deferred Compensation Plan Participation” below) and for Mr. Mueller, the provision of office space and secretarial services at the Company’s headquarters. (See footnote 3 below.) A dash (-) indicates that the individual did not participate in the deferred compensation plan in 2005.
(2)The shares of the Company’s Common Stock were granted to Directors Elliott, Liddy, Lohman, Lumpkin, Mueller, Oberhelman, Saligman and Stokes on January 6, 2005, to Director Jackson on March 1, 2005 and to Director Johnson on May 16, 2005. The prices at which such shares were acquired for the directors was $49.70 per share on January 6, 2005, $51.03 per share on March 1, 2005 and $52.69 per share on May 16, 2005.
(3)Amount represents the estimated value of office space ($7,850) and secretarial services ($5,000) at the Company’s headquarters provided to Director Mueller during 2005.

Deferred Compensation Plan Participation – An optional deferred compensation plan available to directors permits non-management directors to defer all or part of their annual cash retainers and meeting fees. The minimum amount that can be deferred in any calendar year is $3,500. Deferred amounts, plus an interest factor, are used to provide payout distributions following completion of Board service and certain death benefits. Deferred amounts earn interest at 150 percent of the average Mergent’s Seasoned AAA Corporate Bond Yield Index (“Mergent’s Index,” formerly called Moody’s Index) until the participant director retires or dies. After the participant director retires or dies, the deferred amounts earn interest at the average Mergent’s Index rate. For 2005, the average Mergent’s Index rate was 5.63 percent, 150 percent of which was 8.46 percent. A participant director may choose to receive the deferred amounts at retirement in a lump sum payment or in installments over five, ten or fifteen years. Costs of the deferred compensation plan are expected to be recovered through the purchase of life insurance on the participants, with the Company being the owner and beneficiary of the insurance policies.Directors Liddy, Lohman, Lumpkin, Oberhelman, Saligman and Stokes deferred

amounts under the plan in 2005. In the event a participating director resigns from the Board of Directors prior to becoming eligible for retirement and after the occurrence of a change in control (as defined in such plan), the balance in such director’s deferral account, including interest payable at 150 percent of the average Mergent’s Index, shall be distributed in a lump sum to the director within 30 days after the date the director resigns.

Stock Ownership Guideline – In August 2004, the Company’s Board of Directors adopted a stock ownership guideline applicable to all of its directors. Under this guideline, for directors within five years of its adoption or within five years after initial election to the Board, all directors are highly encouraged to own Company Common Stock equal in value to at least three times their base cash annual retainer and to hold such amount of stock throughout their directorships.

Corporate Governance

Corporate Governance Guidelines and Policies, Committee Charters and Codes of Conduct

The Board of Directors has adopted Corporate Governance Guidelines, a Director Nomination Policy, a Policy Regarding NominationsCommunications to the Board of Directors, a Shareholder Communications Policy and Procedures With Respect to Related Person Transactions and written charters for its Audit Committee, Human Resources Committee, Nominating and Corporate Governance Committee, Nuclear Oversight Committee, and Public Policy Committee. The Board of Directors also has adopted the Company’s code of business conduct (referred to as its Corporate Compliance Policy) applicable to all of the Company’s directors, officers and employees and the Company’s Code of Ethics for Principal Executive and Senior Financial Officers. These documents and other items relating to the governance of the Company, including the Company’s corporate strategic planning process and the Board’s involvement in such process, can be found on the Company’sour website athttp://www.ameren.com.www.ameren.com. These documents are also available in print free of charge to any shareholder who requests them from the Office of the Company’s Secretary.
Director Independence
Pursuant to NYSE listing standards, the Company’s Board of Directors has adopted a formal set of categorical independent standards with respect to the determination of director independence. These standards are set forth in the Company’s Director Nomination Policy. The Director Nomination Policy is attached to this proxy statement as Appendix A. The provisions of the Director Nomination Policy regarding director independence meet and in some areas exceed the listing standards of the NYSE. In accordance with the Director Nomination Policy, in order to be considered independent a director must be determined to have no material relationship with the Company other than as a director. The Director Nomination Policy specifies the criteria by which the independence of our directors will be determined.
Under the Director Nomination Policy, an “independent director” is one who:
• has no material relationship with the Company, either directly or as a partner, shareholder or officer of an organization that has a relationship with the Company;


13


• is not an employee of the Company and no member of his or her immediate family is an executive officer of the Company;
• has not been employed by the Company and no member of his or her immediate family has been an executive officer of the Company during the past three years;
• has not received and no member of his or her immediate family has received more than $100,000 per year in direct compensation from the Company in any capacity other than as a director or as a pension for prior service during the past three years;
• is not and no member of his or her immediate family is currently a partner of a firm that is the Company’s internal or external auditor; is not a current employee of the Company’s internal or external auditor; does not have an immediate family member who is a current employee of the Company’s internal or external auditor and who participates in that firm’s audit, assurance or tax compliance (but not tax planning) practices; and for the past three years has not, and no member of his or her immediate family has been (and no longer is) a partner or employee of the Company’s internal or external auditor and personally worked on the Company’s audit within that time;
• is not and no member of his or her immediate family is currently, and for the past three years has not been, and no member of his or her immediate family has, been part of an interlocking directorate in which an executive officer of the Company serves on the compensation committee of another company that employs the director or an immediate family member of the director;
• is not an executive officer or an employee, and no member of his or her immediate family is an executive officer, of another company that makes payments to, or receives payments from, the Company for property or services in an amount which, in any single year, exceeds the greater of $1 million, or two percent of such other company’s consolidated revenues during any of the past three years;
• is free of any relationships with the Company that may impair, or appear to impair his or her ability to make independent judgments; and
• is not and no member of his or her immediate family is employed as an executive officer of a charitable organization that receives contributions from the Company or a Company charitable trust, in an amount which exceeds the greater of $1 million or two percent of such charitable organization’s total annual receipts.
For purposes of determining a “material relationship,” the following standards are utilized:
• any payments by the Company to a director’s primary business affiliation or the primary business affiliation of an immediate family member of a director for goods or services, or other contractual arrangements, must be made in the ordinary course of business and on substantially the same terms as those prevailing at the time for comparable transactions with non-affiliated persons; and
• the aggregate amount of such payments must not exceed two percent of the Company’s consolidated gross revenues; provided, however, there may be excluded from this two percent standard payments arising from (a) competitive bids which determined the rates or charges for the services and (b) transactions involving services at rates or charges fixed by law or governmental authority.
For purposes of these independence standards, (i) immediate family members of a director include the director’s spouse, parents, stepparents, children, stepchildren, siblings, mother- andfather-in-law, sons- anddaughters-in-law, and brothers- andsisters-in-law and anyone (other than domestic employees) who shares the director’s home and (ii) the term “primary business affiliation” means an entity of which the director or the director’s immediate family member is a principal/executive officer or in which the director or the director’s immediate family member holds at least a five percent equity interest.
In accordance with the Director Nomination Policy, the Board undertook its annual review of director independence. During this review, the Board considered transactions and relationships between each director or any member of his or her immediate family and the Company and its subsidiaries and affiliates. The Board


14


also considered whether there were any transactions or relationships between directors or any member of their immediate family (or any entity of which a director or an immediate family member is an executive officer, general partner or significant equity holder). As provided in the Director Nomination Policy, the purpose of this review was to determine whether any such relationships or transactions existed that were inconsistent with a determination that the director is independent.
As a result of this review, the Board affirmatively determined that the following directors are independent under the standards set forth in the Director Nomination Policy: Stephen F. Brauer, Susan S. Elliott, Gayle P.W. Jackson, James C. Johnson, Richard A. Liddy, Gordon R. Lohman, Richard A. Lumpkin, Douglas R. Oberhelman, Harvey Saligman and Patrick T. Stokes; and that Gary L. Rainwater, Charles W. Mueller and Jack D. Woodard are not independent under the Director Nomination Policy.
All members of the Audit Committee, the Human Resources Committee and the Nominating and Corporate Governance Committee of the Board of Directors are independent under the standards set forth in the Director Nomination Policy.
Policy and Procedures With Respect to Related Person Transactions
In February 2007, the Board of Directors adopted the Ameren Corporation Policy and Procedures with respect to Related Person Transactions. This written policy provides that the Nominating and Corporate Governance Committee will review and approve Related Person Transactions (as defined below); provided that the Human Resources Committee will review and approve the compensation of each Company employee who is an Immediate Family Member (as defined above under “— Director Independence”) of a Company director or executive officer and whose compensation exceeds $120,000. The Chair of the Nominating and Corporate Governance Committee has delegated authority to act between Committee meetings.
The policy defines a “Related Person Transaction” as a transaction, arrangement or relationship (or any series of similar transactions, arrangements or relationships) in which the Company (including any of its subsidiaries) was, is or will be a participant and the amount involved exceeds $120,000 and in which any Related Person had, has or will have a direct or indirect material interest, other than (1) competitively bid or regulated public utility services transactions, (2) transactions involving trustee type services, (3) transactions in which the Related Person’s interest arises solely from ownership of Company equity securities and all equity security holders received the same benefit on a pro rata basis, (4) an employment relationship or transaction involving an executive officer and any related compensation solely resulting from that employment relationship or transaction if (i) the compensation arising from the relationship or transaction is or will be reported pursuant to the SEC’s executive and director compensation proxy statement disclosure rules; or (ii) the executive officer is not an Immediate Family Member of another executive officer or director and such compensation would have been reported under the SEC’s executive and director compensation proxy statement disclosure rules as compensation earned for services to the Company if the executive officer was a named executive officer as that term is defined in the SEC’s executive and director compensation proxy statement disclosure rules, and such compensation has been or will be approved, or recommended to our Board of Directors has determined, after careful review, that all director nominees, except Charles W. Mueller and Gary L. Rainwater, are independent as definedfor approval, by the relevant provisionsHuman Resources Committee of the Sarbanes-Oxley Act of 2002, the NYSE listing standards and the Company’s Policy Regarding Nominations of Directors.

Under the Company’s Policy Regarding Nominationsour Board of Directors, an “independent director”or (5) if the compensation of or transaction with a director is one who:

has no material relationship withor will be reported pursuant to the Company, either directly orSEC’s executive and director compensation proxy statement disclosure rules.
“Related Person” is defined as a partner, shareholder or officer of an organization that has a relationship with the Company;

is not an employee of the Company(1) each director, director nominee and no member of his or her immediate family is an executive officer of the Company;

has not been employed by the Company and no member of his or her immediate family has been an executive officer of the Company, during(2) 5% or greater beneficial owners, (3) Immediate Family Members of the past three years;

foregoing persons and (4) any entity in which any of the foregoing persons is a general partner or principal or in a similar position or in which such person and all other related persons to such person has not received and no membera 10% or greater beneficial interest.
The Office of his or her immediate family has received more than $100,000 per year in direct compensation fromthe Corporate Secretary of the Company will assess whether a proposed transaction is a Related Person Transaction for purposes of the policy.
The policy recognizes that certain Related Person Transactions are in any capacity other than asthe best interests of the Company and its shareholders.


15


The approval procedures in the policy identify the factors the Nominating and Corporate Governance Committee will consider in evaluating whether to approve or ratify Related Person Transactions or material amendments to pre-approved Related Person Transactions. The Nominating and Corporate Governance Committee will consider all of the relevant facts and circumstances available to the Nominating and Corporate Governance Committee, including (if applicable) but not limited to: the benefits to the Company; the impact on a director’s independence in the event the Related Person is a director, an Immediate Family Member of a director or asan entity in which a pensiondirector is a general partner, 10% or greater shareholder or executive officer; the availability and costs of other sources for prior service duringcomparable products or services; the past three years;

is notterms of the transaction; the terms available to or from unrelated third parties or to employees generally; and no memberan analysis of his or her immediate family is currently a partnerthe significance of a firmthe transaction to both the Company and the Related Party. The Nominating and Corporate Governance Committee will approve only those Related Person Transactions (a) that isare in compliance with applicable SEC rules and regulations, NYSE listing requirements and the Company’s internalpolicies, including but not limited to the Corporate Compliance Policy and (b) that are in, or external auditor; isare not a current employee ofinconsistent with, the Company’s internal or external auditor; does not have an immediate family member who is a current employee of the Company’s internal or external auditor and who participates in that firm’s audit, assurance or tax compliance (but not tax planning) practices; and for the past three years has not, and no member of his or her immediate family has been (and no longer is) a partner or employee of the Company’s internal or external auditor and personally worked on the Company’s audit within that time;

is not and no member of his or her immediate family is currently, and for the past three years has not been, and no member of his or her immediate family has, been part of an interlocking directorate in which an executive officerbest interests of the Company serves onand its shareholders, as the Nominating and Corporate Governance Committee determines in good faith.
The policy provides for the annual pre-approval by the Nominating and Corporate Governance Committee of certain Related Person Transactions that are identified in the policy, as the policy may be supplemented and amended. For 2007, the Nominating and Corporate Governance Committee (and the Human Resources Committee, in the case of employment relationships involving compensation committee of another company that employs the director or an immediate family member of the director;

is not an executive officer or an employee, and no member of his or her immediate family is an executive officer, of another company that makes payments to, or receives payments from, the Company for property or servicesexceeding $120,000) pre-approved, in an amount which, in any single year, exceeds the greater of $1 million, or 2 percent of such other company’s consolidated revenues during any of the past three years;

is free of any relationshipsaccordance with the Company that may impair, or appear to impair his or her ability to make independent judgments; and

is not and no member of his or her immediate family is employed by or serves as a director, officer or trustee of a charitable organization that receives contributions from the Company or a Company charitable trust, in an amount which exceeds the greater of $1 million or 2 percent of such charitable organization’s total annual receipts.

For purposes of determining a “material relationship,”policy, the following standards are utilized:

Related Person Transactions:
• purchases by the Companyand/or its subsidiaries of equipment, equipment leases and maintenance and training services from Caterpillar Inc. (employer of Director Oberhelman) or its subsidiaries and affiliates; provided that the aggregate amount of all such transactions may not exceed 2% of the Company’s or Caterpillar Inc.’s consolidated gross revenues during any of the past three years;
• sales of non-regulated energy services and leases of office space by the Companyand/or its subsidiaries to Caterpillar Inc. or its subsidiaries and affiliates; provided that the aggregate amount of all such transactions may not exceed 2% of Caterpillar Inc.’s consolidated gross revenues during any of the past three years;
• employment of Patricia A. Fuller, Health and Welfare Consultant, Ameren Services, sister of Gary L. Rainwater, Chairman, President and Chief Executive Officer of Ameren;
• employment of Charles R. Mueller, Supervising Engineer, AmerenIP, son of Charles W. Mueller, a director of Ameren; and
• employment of Michael G. Mueller, President of Ameren Energy Fuels and Services Company and Vice President of Ameren Services, son of Charles W. Mueller, a director of Ameren.
In 2006, the Company’s unwritten policy with respect to Related Person Transactions was to evaluate and monitor Related Person Transactions. Any such transaction was required to comply with the Company’s policies, including the Corporate Compliance Policy, and any payments by the Company to a director’s primary business affiliation or the primary business affiliation of an immediate family member of a director for goods or services, or other contractual arrangements mustwere required to be made in the ordinary course of business and on substantially the same terms as those prevailing at the time for comparable transactions with non-affiliated persons.

The aggregate amount
Other than the employment relationships of such payments must not exceed 2 percent ofCharles R. Mueller and Michael G. Mueller described above, the Company’s consolidated gross revenues; provided, however, there may be excluded from this 2 percent standard payments arising from (a) competitive bids which determined the rates or charges for the services and (b) transactions involving services at rates or charges fixed by law or governmental authority.

For purposes of these independence standards, (i) immediate family members of a director include the director’s spouse, parents, children, siblings, mother- and father-in-law, sons- and daughters-in-law, and brothers- and sisters-in-law and anyone (other than domestic employees) who shares the director’s home and (ii) the term “primaryonly directors that had business affiliation” means an entity of which the director is a principal/executive officer or in which the director holds at least a 5 percent equity interest.

Certain Relationships and Related Transactions – During 2005, subsidiaries of Ameren were parties to certain business transactions with institutions related to directors and nominees. These transactions, which were principally related to the supply of regulated public utility energy services and non-regulated energy services, were done in the ordinary course of business, with terms and conditions the same or substantially the same as those prevailing for comparable transactions with non-affiliated persons. The Board of Directors has determined that these business transactions do not cause a material relationship to exist between the Company and a director or nominee as defined by the NYSE listing standards and the Company’s Policy Regarding Nominations of Directors.

Only Douglas R. Oberhelman had a business relationshiprelationships with the Company in 20052006 that isare required to be reported.reported are Mr. Woodard and Mr. Oberhelman. In 2006, prior to his election to the Board, Mr. Woodard received $125,200, plus reimbursement of his expenses, from the Company for acting as an independent advisor to the Board and the Nuclear Oversight Committee. Mr. Oberhelman is an executive officer of Caterpillar Inc. which purchases regulated public utility energy services and non-regulated energy services from certain of the Company’s subsidiaries (primarily CILCO, Ameren Energy Marketing Company, IP and UE) and sells and leases equipment to and provides maintenance and training services for some of the Amerenour subsidiaries. During 2005, 2006,


16


revenues from energy sales by Ameren subsidiaries to Caterpillar

aggregated approximately $46.8$52.2 million excluding revenues from the supply of regulated public utility services and revenues based on competitive bid transactions. Payments made during 20052006 by Amerenour subsidiaries to Caterpillar for the purchase or lease of equipment aggregated approximately $146,000,$131,000, for the repurchase of energy aggregated approximately $80,000$29,000 and for maintenance and training services aggregated approximately $1.3$1.6 million. Mr. Oberhelman’s wife is the Chief Executive Officer of Cullinan Properties, Ltd. (“Cullinan Properties”), a real estate development firm. During 2006, Cullinan Properties made lease payments to CILCO for office space aggregating approximately $11,000. These transactions, many of which are for multiple year terms, were entered into in the ordinary course of business on an arms length basis. The total of all payments made by the Company’sour subsidiaries to Caterpillar and payments received by the Company’sour subsidiaries from Caterpillar and Cullinan Properties during 20052006 (including payments related to the supply of regulated public utility services and payments related to competitive bid transactions) did not exceed 2two percent of Caterpillar’s 20052006 consolidated revenues of approximately $36.339 billion.$41.52 billion or two percent of Cullinan Properties consolidated revenues, respectively. In addition, the total of all payments made by Amerenour subsidiaries to Caterpillar during 20052006 was less than 2two percent of Ameren’s 2005our 2006 consolidated revenues of approximately $6.78$6.9 billion. Caterpillar, Cullinan Properties and Ameren transactions also did not exceed these 2two percent thresholds during 20032004 and 2004.

2005.

In addition to the above business relationships, certain of the Company’s directors and executive officers had reportable family relationships in 2005.2006. Charles W. Mueller is the father of Michael G. Mueller, President of the Company’s wholly-owned indirect subsidiary, Ameren Energy Fuels and Services Company and a Vice President of Ameren Services, for which he received in 2005 aggregate salary, bonus and other2006 total compensation (consisting of $345,818 and a restricted stockall items included in total compensation in the Summary Compensation Table in this proxy statement) of $360,604 (including $56,017, the dollar amount recognized for financial statement reporting purposes pursuant to Financial Accounting Standards (“FAS”) 123R for the fiscal year ended December 31, 2006 of the target award of 1,640 shares2,997 performance share units under the Company’s Long-Term Incentive Plan of 1998, based on the closing price of $50.69 of Ameren Common Stock valued at $83,984 based on the closing market price of $51.21 per share on February 11, 2005, the date the restricted stock was awarded.10, 2006 grant date). See Footnotes 4 and 5 to the “Summary Compensation Table” under “Executive Compensation” below for more information regarding restricted stockperformance share unit awards and other compensation, respectively. Another son of Mr. Mueller, Charles R. Mueller, is employed by IP as a supervising engineer, for which he received aggregate salary, bonus and othertotal compensation (consisting of $137,825all items included in total compensation in the Summary Compensation Table in this proxy statement) of $157,015 for 2005. A sister of Gary L. Rainwater, Patricia A. Fuller, is employed by Ameren Services as a health and welfare consultant in its Human Resources Function, for which she received aggregate salary, bonus and other compensation of $104,436 for 2005. Wendy C. Brumitt, a daughter of Thomas R. Voss, Executive Vice President and Chief Operating Officer of the Company and an executive officer of various Company subsidiaries, is employed by UE as an engineer at its Callaway nuclear plant, for which she received aggregate salary, bonus and other compensation of $85,469 for 2005.2006. Gary L. Weisenborn, a brother of Dennis W. Weisenborn, a Vice President of various Company subsidiaries, is employed by UE as a superintendent for which he received aggregate salary, bonus and othertotal compensation (consisting of $132,870all items included in total compensation in the Summary Compensation Table in this proxy statement) of $131,473 for 2005. Diana L. Weisenborn, the wife of Gary L. Weisenborn and sister-in-law of Dennis W. Weisenborn, is employed by Ameren Services as an executive secretary, for which she received aggregate salary, bonus and other compensation of $68,095 for 2005. Jennifer Curtis, a daughter of Craig D. Nelson, a Vice President of various Company subsidiaries, is employed by CILCO as a supervisor for customer accounts, for which she received aggregate salary, bonus and other compensation of $75,866 for 2005. Susan M. Prebil, wife of William J. Prebil, a Vice President of various Company subsidiaries, was employed by CILCO as a settlement specialist during a portion of 2005 for which she received salary and other compensation of $4,056. In 2005, Mrs. Prebil terminated her 28 year employment with CILCO pursuant to a voluntary separation program and in that connection received aggregate compensation of $103,644.2006. David E. Boll, abrother-in-law of Robert F. Neff, a Vice President of Ameren Energy Fuels and Services Company, is employed by Ameren Services as a managing supervisor of mechanical engineering for which he received aggregate salary, bonustotal compensation (consisting of all items included in total compensation in the Summary Compensation Table in this proxy statement) of $123,788 for 2006.
Legal and other compensationRegulatory Matters
Anheuser-Busch, Incorporated, an affiliate of $111,401 for 2005. Ricky W. Rogers, a brother-in-lawAnheuser-Busch Companies, Inc., and The Boeing Company are members of Timothy E. Herrmann, a Vice President of UE as of Januarythe Missouri Industrial Energy Consumers group (“MIEC”) which, on September 1, 2006, intervened in the Missouri Public Service Commission proceedings relating to UE’s request for an increase in base rates for electric service. MIEC’s position in the case is employedthat UE overstated its needed revenue requirement and that a disproportionate amount of the increase has been assigned to industrial customers. MIEC also opposes UE’s requested fuel and purchased power cost recovery mechanism. Patrick T. Stokes is the Chairman of the Board of Directors of Anheuser-Busch Companies, Inc. and James C. Johnson is an officer of The Boeing Company. Neither Mr. Stokes nor Mr. Johnson participated in Ameren’s Board and Committee deliberations relating to these matters.
In April 2005, Caterpillar Inc. intervened in the Illinois Commerce Commission (“ICC”) proceedings relating to the power procurement auction and related tariffs of CILCO, CIPS and IP (the “Ameren Illinois Utilities”). In the Ameren Illinois Utilities’ 2005 auction process proceedings, Caterpillar Inc., in conjunction with other industrial customers as a coalition, opposed the Ameren Illinois Utilities’ filing on issues regarding auction design and auction process, among others. In February 2006, Caterpillar Inc. intervened in the 2006


17


rate cases filed by UEthe Ameren Illinois Utilities with the ICC to modify their electric delivery service rates. In the 2006 rate cases, Caterpillar Inc., in conjunction with other industrial customers as substation traveling operator for which he received aggregate salary, bonusa coalition, opposed the Ameren Illinois Utilities’ filings on issues regarding rate design and other compensationrevenue requirements, among others. Douglas R. Oberhelman is an executive officer of $80,715 for 2005.

Caterpillar Inc. Mr. Oberhelman did not participate in Ameren’s Board and Committee deliberations relating to these matters.

ShareholderPolicy Regarding Communications withto the Board of Directors
The non-management directors of the Board of Directors have adopted a policy for shareholders and other interested persons to send communications to the Board. Shareholders and other interested persons who desire to communicate with the Company’s directors or a particular director may write to: Ameren

Corporation Board of Directors, c/o Manager of Investor Relations, Mail Code 202, 1901 Chouteau Avenue, Mail Code 202, St. Louis, Missouri 63103.E-mail communications to directors should be sent to directorcommunication@ameren.com. All communications must be accompanied by the following information: if the person submitting the communication is a shareholder, a statement of the number of shares of the Company’s Common Stock that the person holds; if the person submitting the communication is not a shareholder and is submitting the communication to the Lead Director or the non-management directors as an interested party, the nature of the person’s interest in the Company; any special interest, meaning an interest not in the capacity of a shareholder of the Company, of the person in the subject matter of the communication; and the address, telephone number ande-mail address, if any, of the person submitting the communication. Communications received from shareholders and other interested persons to the Board of Directors will be reviewed by the Manager of Investor Relations and if they are relevant to, and consistent with, the Company’s operations and policies that are approved by all non-management members of the Board and if they conform to the procedural requirements of the Policy, they will be forwarded to the Lead Director or applicable Board member or members as expeditiously as reasonably practicable.

Annual Assessment of Board, Board Committee and Individual Director Performance
The Board reviews its own performance, structure and processes in order to assess how effectively it is functioning. This assessment is implemented and administered by the Nominating and Corporate Governance Committee through an annual Board self-evaluation survey. Individual directors are also asked annually to assess each other’s performance through a director peer assessment. The views of individual directors are collected by the Secretary of the Company and the Chairman of the Nominating and Corporate Governance Committee and summarized for consideration by the full Board. In addition, each of the Audit Committee, Human Resources Committee, Nominating and Corporate Governance Committee, Nuclear Oversight Committee, and Public Policy Committee of the Board conduct an annual self evaluation of its performance. Individual directors are also asked annually to assess each other’s performance through a director peer assessment.

Item (2):     Approval
Director Compensation
Fees and Stock Awards
In June 2006, the Nominating and Corporate Governance Committee of the 2006 Omnibus Incentive Compensation Plan

The Board is requesting that shareholders vote in favor of adopting the Ameren Corporation 2006 Omnibus Incentive Compensation Plan (the “Plan”), which was approved by the Board of Directors on February 10, 2006, subject to shareholder approval. The Plan has been established to replace, on a prospective basis,of Ameren approved the Ameren Corporation Long-Term Incentive Planfollowing compensation program for each director who is not an employee of 1998 (the “Prior Plan”) which was previously approved by shareholders and expires on April 1, 2008. If the Plan is approved by shareholders, no new grants will be made from the Prior Plan. Any awards previously granted under the Prior Plan shall continue to vest and/or be exercisable in accordance with their original terms and conditions.Company:

• an annual cash retainer of $50,000 payable in 12 equal installments (increased from $20,000, effective June 9, 2006);
• an award of 1,000 immediately vested shares of the Company’s Common Stock provided annually to all directors on or about January 1. An award of 1,000 shares of the Company’s Common Stock is also provided to new directors upon initial election to the Board;
• a fee of $1,500 for each Board meeting attended;
• a fee of $1,500 for each Board Committee meeting attended (increased from $1,000, effective June 9, 2006);


18


The proposed Plan is intended to develop employees’ sense of proprietorship and personal involvement in the development and financial success

• an additional annual cash retainer of $10,000 for the Lead Director and for the chairpersons of the Human Resources Committee, the Nominating and Corporate Governance Committee, the Nuclear Oversight Committee, and the Public Policy Committee;
• an additional annual cash retainer of $15,000 for the chairperson of the Audit Committee and an additional $5,000 annual cash retainer for each Audit Committee member;
• reimbursement of customary and usual travel expenses; and
• eligible to participate in a nonqualified deferred compensation program earning interest at 150% of the average Mergent’s Index rate (described below).
Directors who are employees of the Company do not receive compensation for their services as a director.
The following table sets forth the compensation paid to non-management directors for fiscal year 2006, other than reimbursement for travel expenses.
Director Compensation Table
                      
               Change in Pension
      
               Value and
      
               Nonqualified
      
   Fees Earned
        Non-Equity
  Deferred
      
   or Paid
  Stock
  Option
  Incentive Plan
  Compensation
  All Other
   
   in Cash(1)
  Awards(2)
  Awards(3)
  Compensation(3)
  Earnings(4)
  Compensation(5)
  Total
Name
  ($)
  ($)
  ($)
  ($)
  ($)
  ($)
  ($)
(a)  (b)  (c)  (d)  (e)  (f)  (g)  (h)
S.F. Brauer  16,668  54,912           71,580
S.S. Elliott  75,508  51,612          127,120
G. P.W. Jackson  65,504  51,612          117,116
J.C. Johnson  63,004  51,612          114,616
R.A. Liddy  84,016  51,612       7,772    143,400
G.R. Lohman  84,508  51,612      29,321    165,441
R.A. Lumpkin(6)  73,508  51,612      11,318    136,438
C.W. Mueller  85,509  51,612         14,799  151,920
D.R. Oberhelman  84,004  51,612       1,981    137,597
H. Saligman  64,004  51,612      20,411    136,027
P.T. Stokes  57,504  51,612       1,180    110,296
J.D. Woodard  31,170  54,097        125,200  210,467
                      
(1)Represents the cash retainer and fees for service on the Board of Directors and its committees and meeting attendance as discussed above.
(2)As discussed above, the annual grants of 1,000 shares of the Company’s Common Stock were awarded to Directors Elliott, Jackson, Johnson, Liddy, Lohman, Lumpkin, Mueller, Oberhelman, Saligman and Stokes on January 6, 2006, and to Director Woodard on October 31, 2006 and to Director Brauer on November 6, 2006, in connection with their respective elections to the Board of Directors. The price at which such shares were granted (i) to the non-management directors (other than Directors Brauer and Woodard) pursuant to the Long-Term Incentive Plan of 1998 was $51.61 per share on January 6, 2006, (ii) to Director Brauer, pursuant to the 2006 Omnibus Incentive Compensation Plan, was $54.92 per share on November 6, 2006 and (iii) to Director Woodard, pursuant to the 2006 Omnibus Incentive Compensation


19


Plan, was $54.10 per share on October 31, 2006. As of December 31, 2006, the aggregate number of stock awards outstanding was: Mr. Brauer 1,000 shares; Ms. Elliott 3,000 shares; Ms. Jackson 2,000 shares; Mr. Johnson 2,000 shares; Mr. Liddy 5,500 shares; Mr. Lohman 5,500 shares; Mr. Lumpkin 5,500 shares; Mr. Mueller 3,000 shares; Mr. Oberhelman 3,300 shares; Mr. Saligman 5,500 shares; Mr. Stokes 3,000 shares; and Mr. Woodard 1,000 shares.
(3)No stock option awards or payouts under non-equity incentive plans were received by any non-management director in 2006.
(4)Includes above market earnings on deferred compensation (see “— Directors Deferred Compensation Plan Participation” below). Ameren does not have a pension plan for non-management directors.
(5)In the case of Director Mueller, the amount represents the estimated value of office space ($8,350) and secretarial services ($5,500) at the Company’s headquarters and phone charges ($445) provided to Director Mueller during 2006. In the case of Director Woodard, the amount represents fees for his services during 2006 as an independent advisor to the Board and the Nuclear Oversight Committee prior to his election as a director.
(6)Mr. Lumpkin, in accordance with our director retirement age provisions of our Corporate Governance Policy, offered and the Board accepted his resignation effective April 24, 2007, the end of his term as a director.
Directors Deferred Compensation Plan Participation
An optional deferred compensation plan available to directors permitted non-management directors to defer all or part of their annual cash retainers and meeting fees. The minimum amount that was permitted to encourage membersbe deferred prior to calendar year 2007 was $3,500. Directors Liddy, Lohman, Lumpkin, Oberhelman, Saligman and Stokes deferred amounts under the plan in 2006.
Deferred amounts, plus an interest factor, are used to provide payout distributions following completion of Board service and certain death benefits. Deferred amounts earn interest at 150% of the average Mergent’s Seasoned AAA Corporate Bond Yield Index (“Mergent’s Index,” formerly called Moody’s Index) rate until the participant director retires or dies. After the participant director retires or dies, the deferred amounts earn interest at the average Mergent’s Index rate.
For 2006, the average Mergent’s Index rate was 5.24 percent, 150 percent of which was 7.86 percent. A participant director may choose to receive the deferred amounts at retirement in a lump sum payment or in installments over five, ten or fifteen years.
In the event a participating director resigns from the Board of Directors prior to becoming eligible for retirement and after the occurrence of a change in control (as defined in such plan), the balance in such director’s deferral account, including interest payable at 150 percent of the average Mergent’s Index, shall be distributed in a lump sum to the director within 30 days after the date the director resigns.
In November 2006, the Company adopted the Ameren Deferred Compensation Plan for Members of the Board of Directors (the “New Directors Deferred Compensation Plan”), which amends and restates the portion of the deferred compensation plan described above which is subject to Section 409A of the IRC. The New Directors Deferred Compensation Plan permits non-management directors of the Company to annually choose to defer up to 100% (in increments of 1%) of cash retainers and meeting fees. There are no minimum dollar thresholds for deferrals. The New Directors Deferred Compensation Plan became effective as of January 1, 2007 and applies to cash retainers and meeting fees paid to non-management directors on and after such date. The New Directors Deferred Compensation Plan was filed with the SEC as Exhibit 10.2 to the Company’s Current Report onForm 8-K dated December 5, 2006.
Deferred amounts earn interest at 150% of the average Mergent’s Index rate while the participant is a member of the Company’s Board of Directors. After the participant ceases to be a member of the Company’s


20


Board of Directors for any reason after attainment of at least age 55 or dies, the deferred amounts earn interest at the average Mergent’s Index rate.
A participant may choose to receive the deferred amounts upon ceasing to be a member of the Company’s Board of Directors in a lump sum payment or in installments over a set period of up to devote their best efforts15 years. However, in the event a participant ceases being a member of the Company’s Board of Directors prior to age 55, the balance in such participant’s deferral account shall be distributed in a lump sum to the businessparticipant within 30 days of the Company, thereby advancingdate the interestsparticipant ceases being a member of the Company and its shareholders.Company’s Board of Directors. In order to buildthe event a stable and experienced management team, the Company seeks to maintain and strengthen these individuals’ desire to remain with the Company as well as to attract able individuals to become employees or serve as directors. As with the Prior Plan, the ultimate goalparticipant ceases being a member of the Plan isCompany’s Board of Directors prior to encourage those individuals who areattainment of at least 55 years of age and will be responsible forafter the Company’s future growth and continued success to haveoccurrence of a greater personal financial investmentChange of Control (as hereinafter defined under “EXECUTIVE COMPENSATION —Other Potential Post-Employment Payments —Change of Control Protection —Change of Control Severance Plan”), the balance in the Company through ownership of its Common Stock.

This Plan retains manysuch director’s deferral account, including interest payable at 150% of the features of the Prior Plan plus provides new features that will allow greater flexibility, such as performance units denominatedaverage Mergent’s Index rate, shall be distributed in dollars, restricted stock units, cash-based awards and other stock-based awards. As with the Prior Plan, all awards for employees can only be made pursuanta lump sum to the authority ofdirector within 30 days after the Human Resources Committee (the “Committee”)date the director ceases being a member of the Board and with respect to non-management directors, all awards can only be made pursuant toof Directors.

Director Stock Ownership Requirement
In October 2006, the authority of the Board.

Key features of the Plan are described below, but are qualified in their entirety by reference to the full text of the Plan attached as Appendix B to this proxy statement:

The maximum number of shares that may be granted under the Plan totals 4,000,000 shares (which includes shares not granted or subject to awards under the Prior Plan as of May 2, 2006 and any shares subject to outstanding awards under the Prior Plan as of May 2, 2006

that on or after such date cease for any reason to be subject to such awards, but subject to adjustment upon the occurrence of various corporate events as described in the Plan), all of which may be issued pursuant to incentive stock options (ISOs);

Any shares related to awards which terminate by expiration, forfeiture, cancellation, or otherwise without the issuance of such shares, are settled in cash in lieu of shares, or are exchanged with the Committee’s permission, prior to the issuance of shares, for awards not involving shares, shall be available again for grant under the Plan;

Awards may include stock options (including ISOs and nonqualified stock options (NQSOs), stock appreciation rights, restricted stock, restricted stock units, performance units, performance shares, cash-based awards and other stock-based awards;

Shares issued pursuant to “Full Value Awards” (awards other than stock options or stock appreciation rights which are settled by the issuance of shares, e.g. restricted stock, restricted stock units, performance shares, performance units if settled with stock, or other stock-based awards) shall reduce the Plan’s share authorization at a rate of 1 to 1, while shares pursuant to stock option or stock appreciation rights shall reduce the Plan’s share authorization at a rate of .47 to 1;

The exercise price of options and the grant price of stock appreciation rights must be at least equal to 100 percent of the fair market value of the shares as determined on the date of the grant;

The maximum term of options and stock appreciation rights is 10 years;

The Plan does not allow reloads, repricing, stock options issued at a discount to fair market value, or nonqualified stock options or stock appreciation rights to be transferred by a participant for consideration;

TheCompany’s Board of Directors believes that the shares available under the Plan representadopted a reasonable amountstock ownership requirement applicable to all of equity dilution, as the shares available to be granted under the Plan would represent approximately 2 percent of diluted common shares outstanding as of February 1, 2006;

Unless and until the Committee determines that an award to a “covered employee” is not designed to qualify as “Performance-Based Compensation,” annual award limits set forth in the Plan are as follows:

Award(s)Annual Limit

Stock Options

2,000,000 shares

Stock Appreciation Rights

2,000,000 shares

Restricted Stock or Restricted Stock Units

300,000 shares

Performance Units or Performance Shares

Value of 300,000 shares or 300,000 shares

Cash-Based Awards

$5 million

Other Stock-Based Awards

300,000 shares

The performance goals upon which the payment or vesting of an award that is intended to qualify as Performance-Based Compensation is limited to certain Performance Measures as described below and in the Plan:

-Net earnings or net income (before or after taxes);

-Earnings per share;

-Net sales or revenue growth;

-Net operating profit;

-Return measures (including, but not limited to, return on assets, capital, invested capital, equity, sales or revenue);

-Cash flow (including, but not limited to, operating cash flow, free cash flow, cash flow return on equity, and cash flow return on investment);

-Earnings before or after taxes, interest, depreciation, and/or amortization;

-Gross or operating margins;

-Gross revenue;

-Productivity ratios;

-Share price (including, but not limited to, growth measures);

-Expense targets;

-Margins;

-Operating efficiency;

-Capacity utilization;

-Increase in customer base;

-Environmental health and safety;

-Diversity;

-Quality;

-Customer satisfaction;

-Working capital targets;

-Economic value added or EVA (net operating profit after tax minus the sum of capital multiplied by the cost of capital);

-Net debt;

-Corporate governance;

-Total shareholder return;

-Dividend; and

-Bond rating.

The Committee will determine whether the performance targets or goals that have been chosen for a particular performance award have been met and may provide in an award that any evaluation of performance may include or exclude anyits directors. Under this requirement, within five years of the following that are objectively determinable and that occur during the performance period to which the award is subject: asset write-downs, litigation, claim judgments,January 1, 2007 effective date or settlements; the effect of changes in tax laws, accounting principles, or other laws or provisions affecting reporting results; any reorganization and restructuring programs; extraordinary nonrecurring items as described in Accounting Principles Board Opinion No. 30 and/or in management’s discussion of financial condition and results of operations appearing in the Company’s annual report to shareholders or Annual Report on Form 10-K for the applicable year; acquisitions or divestitures; and foreign exchange gains and losses.

Awards that are designed to qualify as performance-based compensation may not be adjusted upward. However, the Committee has the discretion to adjust these awards downward. In addition, the

Committee has the discretion to make awards that do not qualify as performance-based compensation. Generally, awards may be paid in the form of cash, shares of common stock, or in any combination, as determined by the Committee.

Performance awards granted by the Committee under the Plan are intended to qualify for the “performance based compensation” exception from the $1 million cap on deductibility of executive compensation imposed by Section 162(m) of the Internal Revenue Code of 1986, as amended (the “Code”). Because the Company has retained the discretion to change specific performance targets, shareholder re-approval of the Plan will be required in the future under regulations issued pursuant to Section 162(m) of the Code, currently everywithin five years. Thus, absent additional shareholder approval, no performance award may be granted under the Plan subsequent to the Company’s annual meeting of shareholders in 2011.

Administration

The Plan will be administered by the Committee. The Committee shall have full and exclusive discretionary authority, subject to the provisions of the Plan, to establish rules and regulations necessary for the proper administration of the Plan. All actions taken and all interpretations and determinations made by the Committee shall be final and binding.

Eligibility

Employees and non-management directors of the Company or any of its subsidiaries or affiliates are eligible to receive awards under the Plan. From time to time, the Committee (or as to non-management directors, the Board) will determine who will be granted awards, the number of shares subject to such grants and all other terms of awards.

While all employees are eligible to receive awards under the Plan, the Committee currently expects that approximately 180 employees will initially participate in the Plan. The Board currently expects that all non-management directors, of which there will be 10 if all such nominees are elected, will also initially participate in the Plan.

As described above under “Board Structure, Director Compensation and Corporate Governance – Director Compensation –Fees and Stock Awards,” each non-management director is currently awarded on an annual basis 1,000 shares of the Company’s Common Stock and, upon a non-management director’syears after initial election to the Board, 1,000all non-management directors are required to own Company Common Stock equal in value to at least three times their base annual cash retainer and hold such amount of stock throughout their directorship.

At any time, if a non-management director has not satisfied the requirement, such director must retain at least 50% of all shares of the Company’s Common Stock. The Board expects that these awards will be continued under the Plan, and any change would be determined by the Board of Directors in the future. In addition, as described below under “Initial Awards under Plangranted to Named Executive Officers,” the Board has awarded, subject to shareholder approval, certain long-term incentive compensation awards under the Plan to the Named Executive Officers described below, in lieu of awards under the Prior Plan for the period commencinghim or her after January 1, 2006.

Change of Control

Awards2012 under the Plan are expected to be generally subject to special provisions upon the occurrence of a “change of control” as defined in the Change of Control Plan (as defined below “Arrangements With Named Executive Officers – Change of Control Severance Plan”) (in certain cases whether or not the employee has a qualifying termination of employment). The Committee, depending upon market practice, may provide in awards made under the Plan that if a “change of control” occurs (1) all outstanding stock options, and other awards under which the participant may have rights, the exercise of which is restricted or limited, may become fully exercisable, (2) all restrictions or limitations,

including risks of forfeiture and deferrals, on restricted stock or other awards subject to restrictions or limitations under the Plan may lapse and (3) all performance goals applicable to performance awards, and any other conditions to payment of any awards under which payment is subject to conditions may be deemed to be achieved or fulfilled and may be waived by the Company.

Upon a “change of control” which occurs on or before December 31, 2008 in which the Company ceases to exist or is no longer publicly trading on the NYSE or the NASDAQ Stock Market, all of the initial performance share unit awards granted under the Plan, subject to shareholder approval, as described below under “Initial Awards Under Plan to Named Executive Officers” (the “target number”), together with dividends accrued thereon, shall be converted to nonqualified deferredAmeren’s equity compensation in an initial amount equal to the value of one share of the Company’s Common Stock multiplied by the sum of the target number plus dividends accrued thereon, computed as provided in the award agreement. Interest on the nonqualified deferred compensation shall accrue based on the prime rate, computed as provided in the award agreement. If the participant remains employed with the Company or its successor until December 31, 2008, the nonqualified deferred compensation, plus interest will be paid to the participant as a lump sum on such date. If the participant remains employed with the Company or its successor until his death or disability which occurs before December 31, 2008, the participant or his designee will immediately receive the nonqualified deferred compensation, plus interest, upon such death or disability. If the participant is involuntarily terminated (which includes a voluntary termination for Good Reason (as defined in the Change of Control Plan) (collectively, a “qualifying termination”)) before December 31, 2008, the participant will immediately receive the nonqualified deferred compensation, plus interest upon such termination. If the participant terminates employment before December 31, 2008 other than as described in the two immediately preceding sentences, the nonqualified deferred compensation, plus interest is forfeited. Upon such a “change of control” that occurs after December 31, 2008, the participant will receive an immediate distribution of cash equal to the value of one share of the Company’s Common Stock multiplied by the number of earned performance share units, computed as provided in the award agreement.

With respect to the initial performance share unit awards, if there is a “change of control” but the Company continues in existence and remains a publicly traded company on the NYSE or the NASDAQ Stock Market, the performance share units will pay out upon the earliest to occur of the following: (i) January 1, 2011, (ii) the participant’s death, (iii) if the participant becomes disabled or retires during the performance period, January 1, 2009, (iv) if the participant becomes disabled or retires after the performance period, upon the participant’s disability or retirement, respectively, (v) if the participant experiences a qualifying termination during the two-year period following the “change of control” and the termination occurs prior to January 1, 2009, all of the performance share units the participant would have earned if such participant remained employed until December 31, 2008 will vest on such date and such vested performance share units will be paid in shares of the Company’s Common Stock as soon as practicable thereafter, and (vi) if the participant experiences a qualifying termination during the two-year period following the “change of control” but the termination occurs after December 31, 2008, the participant will receive an immediate distribution of the earned shares of the Company’s Common Stock.

Federal Income Tax Consequences

The following discussion summarizes certain material federal income tax consequences of the issuance and receipt of awards under the Plan under the law as in effect on the date of this proxy statement. The summary does not purport to cover all federal employment tax or other federal tax consequences that may be associated with the Plan, nor does it cover state, local, or non-U.S. taxes.

Incentive Stock Options (ISO)

An employee generally realizes no taxable income upon the grant or exercise of an ISO. However, the exercise of an ISO may result in an alternative minimum tax liability to the employee. With some

exceptions, a disposition of shares purchased under an ISO within two years from the date of grant or within one year after exercise produces ordinary income to the optionee equal to the value of the shares at the time of exercise less the exercise price. The same amount is deductible by the Company as compensation, provided that the Company reports the income to the employee. Any additional gain recognized in the disposition is treated as a capital gain for which the Company is not entitled to a deduction. If the employee exercises an ISO and satisfies the holding period requirements, the Company may not deduct any amount in connection with the ISO. If a sale or disposition of shares acquired with the ISO occurs after the holding period, the employee will recognize long-term capital gain or loss at the time of sale equal to the difference between proceeds realized and the exercise price paid.

In general, an ISO that is exercised by the optionee more than three months after termination of employment is treated as an NQSO. ISOs are also treated as NQSOs to the extent they first become exercisable by an individual in any calendar year for shares having a fair market value (determined as of the date of grant) in excess of $100,000.

Non-Qualified Stock Options (NQSO)

An optionee generally has no taxable income at the time of grant of an NQSO but realizes income in connection with exercise of the option in an amount equal to the excess (at the time of exercise) of the fair market value of shares acquired upon exercise over the exercise price. The same amount is deductible by the Company as compensation, provided that, in the case of an employee option, the Company reports the income to the employee. Upon a subsequent sale or exchange of the shares, any recognized gain or loss after the date of exercise is treated as capital gain or loss for which the Company is not entitled to a deduction.

Stock Appreciation Rights (SARS)

Generally, the recipient of a stand-alone SAR will not recognize taxable income at the time the stand-alone SAR is granted. If a participant receives the appreciation inherent in the SARs in cash, the cash will be taxed as ordinary income to the participant at the time it is received. If a participant receives the appreciation inherent in the SARs in shares, the spread between the then current market value and the base price will be taxed as ordinary income to the participant at the time it is received. In general, there will be no federal income tax deduction allowed to the Company upon the grant or termination of SARs. However, upon the settlement of an SAR, the Company will be entitled to a deduction equal to the amount of ordinary income the recipient is required to recognize as a result of the settlement.

Restricted Stock

The recipient of restricted stock will not recognize any taxable income for federal income tax purposes in the year of the award, provided the shares are subject to restrictions (that is, they are nontransferable and subject to a substantial risk of forfeiture). However, the recipient may elect under Section 83(b) of the Code to recognize compensation income in the year of the award in an amount equal to the fair market value of the shares on the date of the award (less the purchase price, if any, paid for such shares), determined without regard to the restrictions. If a Section 83(b) election is made, the capital gains/loss holding period for such shares commences on the date of the award. Any further change in the value of the shares will be taxed as a capital gain or loss only if and when the shares are disposed of by the recipient. If the recipient does not make a Section 83(b) election, the fair market value of the shares on the date the restrictions lapse will be treated as compensation income to the recipient and will be taxable in the year the restrictions lapse, and the capital gains/loss holding period for such shares will also commence on such date. Except as described under“Other Tax Matters”

below, the Company or one of its subsidiaries generally will be entitled to a deduction for compensation paid in the same amount treated as compensation income to the recipient.

Restricted Stock Units

No income generally will be recognized upon the award of restricted stock units. The recipient of a restricted stock unit award generally will be subject to tax at ordinary income rates on the market price of unrestricted shares on the date that such shares are transferred to the participant under the award (reduced by any amount paid, if any, by the participant for such restricted stock units), and the capital gains/loss holding period for such shares will also commence on such date.

Cash Awards

Cash awards are taxable income to the recipient for federal income tax purposes at the time of payment. The recipient will have compensation income equal to the amount of cash paid, and except as described under“Other Tax Matters” below, the Company will have a corresponding deduction for federal income tax purposes.

Performance Awards

A participant who receives a performance award will not recognize any taxable income for federal income tax purposes upon receipt of the award. Any shares received pursuant to the settlement of the award will be treated as compensation income received by the employee generally in the year in which the employee receives such shares. Upon selling the shares, the recipient will recognize a capital gain or loss in an amount equal to the difference between the sale price of the shares and the recipient’s tax basis of the shares. The Company generally will be entitled to a deduction for compensation paid in the same amount that is treated as compensation income to the recipient.

Other Tax Matters

The exercise by a participant of a stock option, the lapse of restrictions on restricted stock, or the deemed achievement or fulfillment of performance awards following the occurrence of a change of control, in certain circumstances, may result in (i) a 20 percent federal excise tax (in addition to federal income tax) to the participant on certain payments of shares resulting from such exercise or deemed achievement or fulfillment of performance awards or, in the case of restricted stock, on all or a portion of the fair market value of the shares on the date the restrictions lapse and (ii) the unavailability of a compensation deduction which would otherwise be allowable to the Company as explained above. Except for stock options and performance awards that meet the requirements of the Plan and are based on the performance measures described therein, the Company may not be eligible for a compensation deduction which would otherwise be allowable for compensation paid to any employee if, as of the close of the tax year, the employee is the chief executive officer of the Company or is among the four other highest compensated officers for that tax year for whom compensation is required to be reported to shareholders under the Securities Exchange Act of 1934, as amended, to the extent the total compensation paid to such employee exceeds $1,000,000.

Initial Awards Under Plan to Named Executive Officers

On February 10, 2006, the Committee recommended and the Company’s Board of Directors approved the issuance pursuant to the Plan of performance share units to the Named Executive Officers as defined below (see “Security Ownership – Security Ownership of Management”) as follows, subject to shareholder approval of the Plan: W. L. Baxter, 17,755; C. D. Naslund, 7,600; G. L. Rainwater, 55,928; S. R. Sullivan, 13,494; and T. R. Voss, 15,624. Each performance share unit

represents the right to receive a share of the Company’s Common Stock assuming certain performance criteria are achieved. The actual number of performance share units earned will vary from 0 percent to 200 percent of the target number of performance share units granted to each Named Executive Officer identified above, based on the Company’s three-year total shareholder return (“TSR”) relative to a utility peer group and continued employment during the three-year period. Once earned, performance share units continue to rise and fall in value with the Company’s Common Stock price for two years, at which time the performance share units are paid in the Company’s Common Stock. Dividends on performance share units will accrue and be reinvested into additional performance share units throughout the three-year performance share period. Dividends will be paid on a current basis during the two-year holdback period. Because these performance share units will be earned only if performance goals over performance periods are attained, the amounts, if any, that will be payable to the Named Executive Officers pursuant to the performance share unit awards described above are not determinable at this time.

Additional Information

Upon approval by the Company’s shareholders, the Plan will be effective on May 2, 2006 and will terminate on May 2, 2016, unless terminated earlier by the Board of Directors. The Board may amend the Plan as it deems advisable, except that it may not amend the Plan without shareholder approval where the absence of such approval would cause the Plan to fail to comply with any requirement of applicable law or regulation. Employees who will participate in the Plan in the future and the amounts of their allotments are to be determined by the Committee subject to any restrictions outlined in the Plan.

The Company expects that stock options and performance awards under the Plan will qualify as performance-based compensation that is exempt from the $1,000,000 annual deduction limit (for federal income tax purposes) of compensation paid by public corporations to each of the corporation’s chief executive officer and four other most highly compensated executive officers in each fiscal year, which limit is imposed by Section 162(m). Because of ambiguities and uncertainties as to the application and interpretation of Section 162(m) and the regulations issued thereunder, no assurance can be given, notwithstanding the Company’s efforts, that compensation intended by the Company to satisfy the requirements for deductibility under Section 162(m) will in fact do so.

The closing price per share on the NYSE of the Company’s Common Stock on February 1, 2006 was $51.21. The Company intends to register the shares issuable under the Plan under the Securities Act of 1933, as amended, after it receives shareholder approval.

The Board believes it is in the best long-term interests of both shareholders and employees of the Company to maintain a progressive stock-based incentive program in order to attract and retain the services of outstanding directors and personnel and to encourage such directors and personnel to have a greater financial investment in the Company. Although the success of the Company over the past eight years cannot be attributed solely to the adoption of the Prior Plan, the Board firmly believes it contributed to the Company’s success.

Passage of the proposal requires the affirmative vote of a majority of the shares entitled to vote on the proposal and represented in person or by proxy at the meeting at which a quorum is present.

YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR THE APPROVAL OF THE AMEREN CORPORATION 2006 OMNIBUS INCENTIVE COMPENSATION PLAN.

programs.

Item (3):    Ratification of the Appointment of Independent Auditors for the Fiscal Year Ending December 31, 2006

Item (2):  Ratification of the Appointment of Independent Registered Public Accountants for the Fiscal Year Ending December 31, 2007
The Company is asking its shareholders to ratify the appointment of PricewaterhouseCoopers LLP (“PwC”) as the Company’s independent auditorsregistered public accountants for the fiscal year ending December 31, 2006.2007. PwC was appointed by the Audit Committee.

Although ratification by the shareholders is not required by law, the Board of Directors has determined that it is desirable to request approval of this selection by the shareholders. In the event the shareholders fail to ratify the appointment, the Audit Committee will consider this factor when making any determination regarding PwC. Even if the selection is ratified, the Audit Committee in its discretion may direct the appointment of a different independent accounting firm at any time during the year if it determines that such a change would be in the best interests of the Company and its shareholders.

Passage of the proposal requires the affirmative vote of a majority of the shares entitled to vote on the proposal and represented in person or by proxy at the meeting at which a quorum is present.

YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR THE RATIFICATION OF THE APPOINTMENT OF PWC AS INDEPENDENT AUDITORS FOR FISCAL YEAR ENDING DECEMBER 31, 2006.

Item (4):    Shareholder Proposal Requesting an EvaluationYour Board of a 20-Year ExtensionDirectors unanimously recommends that you vote for the ratification of the Callaway Nuclear Plant Operating Licenseappointment of PwC as Independent Registered Public Accountants for fiscal year ending December 31, 2007.

Item (3):  Shareholder Proposal Relating to Releases From the Callaway Plant
Proponents of the shareholder proposal described below notified the Company of their intention to attend the Annual Meeting to present the proposal for consideration and action. The names and addresses of the proponents and the number of shares they hold will be furnished by the Secretary of the Company upon receipt of any telephonic or written request for such information.


21


WHEREAS:

Whereas: Nuclear power plants, including Callaway, during routine operation, release radioactive wastes into the air and water that we believe increase the risk of life-shortening illnesses, genetic mutations, and environmental damage.
Though the federal government’s “permissible” concentration levels govern these releases, we believe “permissible” does not mean safe, but merely expedient.
AmerenUE extracts Missouri River water for Callaway’s cooling systems; some of that water becomes radioactively contaminated and is intentionally released after filtering and monitoring. Radioactive gases are also generated during the plant’s operation; some are released to the atmosphere.
However, no economically feasible technology exists to remove all radioactive materials from the cooling water and gaseous emissions — such as, particles too small to filter, and certain gases and liquids. Monitoring technologies also cannot accurately detect some of these materials. In addition, accidental releases and leaks can occur from pipes, pumps, valves and other components and systems.
Tritium, for example, a radioactive isotope of hydrogen, accumulates in cooling water as a fission and activation product.
Since no economically feasible technology exists to filter tritium from a reactor’s effluents, it is normally released in gaseous emissions to the atmosphere and in liquid releases into the Missouri River — 79 miles upstream from St. Louis County’s major drinking water intake.
The medical profession typically decontaminates a lab tabletop that measures even 100 trillionths of one curie of radioactivity per four-inch square. During Callaway’s operation in 2005, the Company reported releasing 1,292 curies of tritium in 128 batches of radioactive wastewater into the Missouri River. The company also reported releasing tritium to the atmosphere.
Tritium can be ingested or inhaled, potentially causing cellular, genetic, and reproductive damage. Its half life is 12.3 years; it continues releasing radioactivity for at least ten half-lives.
Since late 2005, nuclear power plant owners, including AmerenUE, have been reporting to the Nuclear Regulatory Commission (NRC) issues 40-year operating licenses for commercial nuclear power plants,the occurrence of unfiltered, accidental leaks of tritium and allows these licenses toother radioactive materials within their plant sites and beyond. AmerenUE announced tritium leaks from groundwater pipes in summer 2006. Six tritium leaks had also occurred between 1987 and 2005.
The impacts of Callaway’s liquid releases on algae, fish and other creatures (including humans) living downstream can be renewed for an additional 20 years.

A nuclear power plant licensee seeking to renew its original license must submit an application topersistent. Gaseous releases can also persist in the NRC that:

environment.
Identifies any reactor system, structure and component that could be affected by the adverse consequences of additional aging during the proposed 20-year extended period of operation;

Analyzes the environmental, health and safety effects of extended reactor operation.

Some licensees have already received 20-year extensions of their original 40-year licenses. A licensee is allowed to apply to renew its license within the 20 years prior to the license expiration. Because Ameren’s Callaway Plant in Missouri began operating in December 1984, its operating license is due to expire in 2024. Ameren is therefore allowed to apply to renew its license within the current twenty years.

RESOLVED:Resolved

: Shareholders request that Ameren prepare adescribe, in its next annual report, at reasonable cost, omitting confidential information,its efforts to reduce the release of radioactive material to the air and available within six monthswater during Callaway’s routine operation and to improve the quality of the 2006 annual meeting, that disclosesmonitoring of these releases.

Supporting Statement
Radioactive releases occur during Callaway’s routine operation and as the company’s evaluation (pros and cons)result of applying for a twenty-year extension of Callaway’s current 40-year operating license.

SUPPORTING STATEMENT

leakages. We believe there are concerns about extendingthat the operating lifeimpact of these radioactive releases, no matter how small, is cumulative, irreversible, and potentially dangerous. There is also the Callaway nuclear power plant beyond the 40-year duration for which the plant was originally designed, including:

– A 2005 National Academythreat of Sciences report presents new information that even low doses of ionizing radiation may cause adverse genetic and other health effects. (“Health Risks from Exposure to Low Levels of Ionizing Radiation,” BEIR VII – Phase 2);

– Due to the retirement of experienced employees and the industry-wide shortage of trained replacement employees, working conditions at nuclear power plants may become increasingly dangerous. Recruitment may continue to be difficult because of more widespread recognition of radiation hazards;

– Geologic, economic, transportation and security concerns about the proposed Yucca Mountain, Nevada, high-level radioactive waste disposal facility have made the ultimate disposal of Callaway’s irradiated fuel rods uncertain. Political and capacity concerns at the Barnwell, South Carolina, low-level radioactive waste facility also make the disposition of Callaway’s low-level waste uncertain;

– Planned andmajor accidental releases of radioactive waste from Callaway to the Missouri River and the atmosphere during an additional 20 years may impact upon the health of downstream and downwind residents;

– In addition to the costs of operating and maintaining nuclear power plants, utilities are faced with the expense of replacing many components and retrofitting others as the plants age. For example, after only 20 years, Ameren had to replace massive, expensive steam generators that were supposed to have lasted for the plant’s entire 40-year licensed operation. Such expenditures could add substantially to the cost of generating electricity.

releases. Ameren remains morally responsible and financially liable for Callaway into the indefinite future. We believe this report is essentialfuture, and should take responsibility for Ameren’s realistica more complete accounting of all radioactive releases, so that the Company and responsible, economic and ethical planning and for its accountability to its shareholders.

shareholders can more accurately assess the plant’s impact on the biosphere.

YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE AGAINST ITEM (4)Your Board of Directors unanimously recommends a vote against Item (3).

The Board is of the opinion that it is unwarranted to include, in Ameren’s annual report, any description of the concerns about extendingCompany’s efforts to reduce the operating license forrelease of radioactive materials to the air and water during the Callaway Plant are premature, unnecessaryPlant’s routine operation and would increase expenses without commensurate increase in relevant information.

At this time, Ameren has not decided whether it will pursue renewalimprove the monitoring of the operating license for the Callaway Plant. The U.S. Nuclear Regulatory Commission (“NRC”) rules consider a license renewal application to be timely if submitted five years before the expiration of the plant license. Because the operating license for the Callaway Plant does not expire until 2024, an application in 2019 would be considered timely. Therefore, any evaluation at this juncture would simply be premature. At this time, Ameren is monitoring the developmentsthese releases. Providing such information in the nuclear industry in license renewalannual report is unnecessary because information concerning effluent releases and will benefit from the evaluations and assessments performed by other utilities and the NRC.treatment system modifications is readily available.

The NRC has prepared a comprehensive Generic Environmental Impact Statement (“GEIS”) evaluating the impact of environmental effects that would be associated with license renewal at any nuclear power plant site. The GEIS evaluates whether extended operation of a nuclear power plant would have any impact on human health, and bases this evaluation on a linear no-threshold model that assumes risk at any level of exposure to radiation, consistent with the
22


 

recommendations• 

The amount of activity released at the Callaway Plant in effluents is reported periodically to the U.S. Nuclear Regulatory Commission (“NRC”). This information is available to the public. The most recent report of Callaway radioactive releases, entitled 2005 Callaway Plant Effluent Release Report, is available online at the NRC website, http://www.nrc.gov/reading-rm/adams.html with accession number ML061290525.
• The Callaway Plant includes systems designed to keep, to the greatest extent practicable, radioactive materials from being discharged with the water and air releases from the plant. For example, Callaway’s levels of radioactivity from the plant’s gaseous and liquid releases from January 2005 through December 2006 were significantly less than 1% of the 2005 National Academy of Sciences Report. The GEIS also evaluatesannual radioactive dose allowed by federal government regulations designed to protect the disposal of highhealth and low level radioactive waste, the release of plant effluents, and accident risk. Consequently, a generic evaluationsafety of the proponent’s concerns already exists.

public. Significant effort is made to maximize the efficiency of those plant systems in removing radioactive materials from the plant’s releases.
• The NRC requires the Callaway Plant to monitor and record all effluent releases through vents and other plant discharge points to assure that no radioactive releases are made in excess of regulatory limits. There are plant procedures that control the Callaway effluent monitoring program. The NRC periodically reviews and inspects this program to ensure that Callaway meets all applicable requirements for radioactive effluent control and monitoring.
• The Callaway Plant monitors the surrounding environment pursuant to its Radiological Environmental Monitoring Program. This program is designed to identify any radiological effects from Callaway Plant operations on the surrounding environment. The results of this monitoring are reported to the NRC and are available to the public. The 2005 environmental monitoring report, entitled Callaway Unit 1 2005 Environmental Operating Report, is available online at the NRC website, with accession number ML061280626.

Numerous older plants have already applied for license renewal. The operators of those plants have not identified the need for any major plant refurbishment. Rather, aging of important systems, structures and components is addressed by ongoing maintenance and surveillance programs, and routine replacements of certain components over the life of the plant.

If Ameren were to apply for renewal of the operating license of the Callaway Plant, it would be required under the NRC’s rules to prepare an Integrated Plant Assessment demonstrating that the effects of aging will be adequately managed. Ameren would also be required to prepare a site-specific supplement to the GEIS which would include an evaluation of the potential impact on the environment if the Callaway Plant operates for another 20 years. The NRC would provide public notice of the application and provide an opportunity for hearing upon the request of any person whose interest might be affected. Therefore, if Ameren were to decide to pursue renewal of the Callaway Plant operating license in the future, the appropriateness of a renewal would be addressed in full and open regulatory proceedings.

Ameren’s Health and Safety Policy and Environmental Policy evidence the Company’s commitment to protecting its employees, the public and the environment. Ameren fulfills its commitment to safety and environmental compliance by maintaining a corporate culture that recognizes safety and environmental compliance and stewardship as measurable goals. Operating the Callaway Plant in a safe and environmentally sound manner is an important part of these policies. The Board of Directors establishedbelieves that, considering the Nuclear Oversight Committee to assistvery low radioactive releases from Callaway, the Boardcontinuous effluent control and monitoring programs that are in providingplace under the oversight of the Callaway Plant’s operations (including safetyNRC, and environmental concerns) and advisethe availability to the public of detailed information on the radioactive discharges from the plant, there is no reason to provide a description in Ameren’s annual report of the efforts at the facility to reduce the release of radioactive materials or improve monitoring of those releases. Therefore, the Board in developing and implementing long-term strategies and plans relating to the Callaway Plant. Ameren’s Safety and Health Policy and Environmental Policy, together with Board oversight and regulation by the NRC, will appropriately and adequately address the potential issues raised by this proposal. Accordingly, the Board of Directors unanimously recommends voting AGAINST ITEM 4.

Against Item (3).

Passage of the proposal requires the affirmative vote of a majority of the shares entitled to vote on the proposal and represented in person or by proxy at the meeting at which a quorum is present.

Item (5):     
Other Matters

The Board of Directors does not know of any matter, other than the election of Directors, approval of the Ameren Corporation 2006 Omnibus Incentive Compensation Plan, ratification of the appointment of independent auditors,registered public accountants and the shareholder proposal set forth above, which may be presented toat the meeting. However, if any other matters should properly come before the meeting, it is the intention of the persons named in the enclosed proxy to vote thereon in accordance with their best judgment.


23


SECURITY OWNERSHIP

Security Ownership of More Than 5Five Percent Shareholders
The following table contains information with respect to the ownership of Ameren Common Stock by each person known to the Company who is the beneficial owner of more than five percent of the outstanding Common Stock.

         
  Shares of Common Stock
  
  Owned Beneficially at
 Percent of
Name and Address of Beneficial Owner
 December 31, 2006 Common Stock (%)
 
Franklin Resources, Inc.   14,673,839(1)  7.1 
Charles B. Johnson
Rupert H. Johnson, Jr.
Franklin Advisers, Inc.
One Franklin Parkway
San Mateo, California94403-1906
        
Capital Research and Management Company  12,222,800(2)  5.9 
333 South Hope Street
Los Angeles, California 90071
        
Lord, Abbett & Co. LLC  11,251,645(3)  5.4 
90 Hudson Street
Jersey City, New Jersey 07302
        

Name and Address of Beneficial Owner


Shares of Common Stock
owned Beneficially at
December 31, 2005


Percent of
Common Stock (%)


Franklin Resources, Inc.

Charles B. Johnson

Rupert H. Johnson, Jr.

Franklin Advisers, Inc.

One Franklin Parkway

San Mateo, California 94403-1906

10,993,575(1)5.4

Capital Research and

Management Company

333 South Hope Street

Los Angeles, California 90071

(1)
10,504,700(2)5.1

(1)The number of shares owned as of December 31, 20052006 according to Amendment No. 12 to Schedule 13G filed with the SEC on February 7, 2006.5, 2007. Franklin Resources, Inc. is a parent holding company, Charles B. Johnson and Rupert H. Johnson, Jr. are each a control person, and Franklin Advisers, Inc. is an investment adviser, all in accordance with SECRule 13d-1(b)(1)(ii). The shares are beneficially owned by one or more open or closed-end investment companies or other managed accounts which are advised by direct and indirect advisory subsidiaries, including subsidiaries of Franklin Resources, Inc. These adviser subsidiaries have been granted all investmentand/or voting power over the shares. Charles B. Johnson and Rupert H. Johnson, Jr. each own in excess of 10 percent of the outstanding common stock of Franklin Resources, Inc. and are the principal shareholders of Franklin Resources, Inc. According to the Schedule 13G filing, Franklin Resources, Inc., its principal shareholders and each of the adviser subsidiaries disclaim any economic interest or beneficial ownership in any of the shares. The amendment to the Schedule 13G reports that Franklin Advisers, Inc. and Fiduciary Trust Company International have sole power to vote or to direct the vote of 10,864,44114,559,141 shares and 119,62184,698 shares, respectively, and sole power to dispose or to direct the disposition of 10,864,44114,589,141 shares and 129,13484,698 shares, respectively.
 
(2)The number of shares owned as of December 30, 200529, 2006 according to Amendment No. 78 to Schedule 13G filed with the SEC on February 10, 2006.12, 2007. Capital Research and Management Company is an investment advisor registered under Section 203 of the Investment Advisers Act of 1940. It is deemed to be the beneficial owner of the shares as a result of acting as investment adviser to various investment companies registered under Section 8 of the Investment Company Act of 1940.
(3)The number of shares owned as of December 29, 2006 according to Schedule 13G filed with the SEC on February 14, 2007. The Schedule 13G reports that Lord, Abbett & Co. LLC is an investment advisor registered under Section 203 of the Investment Advisers Act of 1940 with sole power to vote or to direct the vote of 10,794,038 shares and sole power to dispose or to direct the disposition of 11,237,145 shares.


24


Security Ownership of Directors and Management
The following table sets forth certain information known to the Company with respect to beneficial ownership of Ameren Common Stock as of February 1, 20062007 for (i) each director and nominee for director of the Company, (ii) the Company’s Chairman, President and Chief Executive Officer, and President,the Company’s Chief Financial Officer, and the four otherthree most highly compensated executive officers of the Company (and/or its subsidiaries) (other than the Chairman, President and Chief Executive Officer and the Chief Financial Officer) who were serving as executive officers at the end of 2005,2006, named in the Summary Compensation Table below (collectively, the “Named Executive Officers”“Executives”), and (iii) all executive officers, directors and nominees for director as a group.

              Name               


 
Number of Shares of
Common Stock
Beneficially Owned(1)

 Percent
Owned(2)


Common Stock Beneficially
Percent
NameOwned(1)Owned(2)
Warner L. Baxter

 33,52228,398 *

Susan S. Elliott

Stephen F. Brauer
 3,1582,012 *

Susan S. Elliott

4,316*
Gayle P. W. Jackson

 2,0503,152 *

James C. Johnson

 2,0363,138 *

Richard A. Liddy

 13,76715,320 *

Gordon R. Lohman

 6,7168,040 *

Richard A. Lumpkin

 9,72212,243 *

Charles W. Mueller

 62,69959,993 *

Charles D. Naslund

 16,73215,691 *

Douglas R. Oberhelman

 3,5004,675 *

Gary L. Rainwater

 79,53570,533 *

Harvey Saligman

 9,95711,428 *

Patrick T. Stokes

 3,0994,254 *

Steven R. Sullivan

 17,89414,405 *

Thomas R. Voss

 33,69435,431 *

Jack D. Woodard

2,012*
All directors, nominees for director and executive

officers as a group (26 persons)

 447,806420,751 *

  *
Less than one percent.

 
(1)This column lists voting securities, including restricted stock held by current and former executive officers over which the individuals have voting power but no investment power. None of the named individuals held shares issuable within 60 days upon the exercise of stock options. Reported shares include those for which a director, nominee for director or executive officer has voting or investment power because of joint or fiduciary ownership of the shares or a relationship with the record owner, most commonly a spouse, even if such director, nominee for director or executive officer does not claim beneficial ownership.

 
(2)For each individual and group included in the table, percentage ownership is calculated by dividing the number of shares beneficially owned by such person or group as described above by the sum of the 204,746,388206,599,810 shares of Common Stock outstanding on February 1, 20062007 and the number of shares of Common Stock that such person or group had the right to acquire on or within 60 days of February 1, 2006,2007, including, but not limited to, upon the exercise of options.

Since 2003, the Company has had a policy which prohibits directors and executive officers from engaging in pledges of Company securities or margin accounts with respect to Company securities.
The address of all persons listed above is c/o Ameren Corporation, 1901 Chouteau Avenue, St. Louis, Missouri 63103.


25


Stock Ownership GuidelineRequirements
Stock Ownership Requirement for Directors
The stock ownership requirement applicable to directors is described above under ��ITEMS YOU MAY VOTE ON —Director Compensation —Director Stock Ownership Requirement.”
Stock Ownership Requirement for Officers
In October 2005,2006, the Company’s Board of Directors adopted, effective January 1, 2006,2007, a stock ownership guidelinerequirement applicable to all of thecertain officers of the Company and its subsidiaries. Under this guideline,requirement, within five years of its January 1, 20062007 effective date or within five years after initial election as an officer,to such office, each such officer is encouragedrequired to own shares of the Company’s Common Stock valued as a percentage of base salary as follows: President and Chief Executive Officer (500of Ameren (300 percent), President and Chief Executive Officer of CILCO, CILCORP, CIPS, IP, UE, AER and Ameren Services (200 percent), Executive Vice President (400(200 percent), President and Chief Executive Officer of Ameren subsidiaries other than the foregoing (100 percent), Senior Vice President (300 percent) and Vice President (200(100 percent). See “Director Compensation” under “Item 1: Election, provided that officers holding multiple positions with Ameren and its subsidiaries shall be subject to the higher applicable share ownership requirement. When an officer subject to the Officer Stock Ownership Requirement reaches the age of Directors” above for a description of62, the applicable Officer Stock Ownership Requirement is reduced by one-half. At any time an officer subject to the stock ownership guidelinerequirement has not satisfied the applicable requirement, such officer must retain at least 50% of the net shares delivered to the Company’s non-management directors.

him or her pursuant to awards granted after January 1, 2012 under Ameren’s equity compensation programs.

Section 16(a)16(a) Beneficial Ownership Reporting Compliance
Section 16(a) of the Securities Exchange Act of 1934, as amended, requires the Company’s directors and executive officers and persons who own more than 10 percent of the Company’s Common Stock to file reports of their ownership in the equity securities of the Company and its subsidiaries and of changes in that ownership with the SEC and the NYSE. SEC regulations also require the Company to identify in this proxy statement any person subject to this requirement who failed to file any such report on a timely basis. Based solely on a review of the filed reports and written representations that no other reports are required, each of the Company’s directors and executive officers complied with all such filing requirements during 2005.2006. The Company does not have any greater than 10 percent shareholders.


26


EXECUTIVE COMPENSATION

Notwithstanding anything to the contrary set forth in any of the Company’s filings under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, that might incorporate other filings with the SEC, including this proxy statement, in whole or in part, the following Ameren Corporation Human Resources Committee Report on Executive Compensation and the Performance Graph on page 32 shall not be deemed to be incorporated by reference into any such filings.

Ameren Corporation
Human Resources Committee Report
The Human Resources Committee (the “Committee”) discharges the Board’s responsibilities relating to compensation of the Company’s executive officers and for all Company subsidiaries which are registered companies pursuant to the Securities Exchange Act of 1934. The Committee approves and evaluates all compensation of executive officers, including salaries, bonuses, and compensation plans, policies and programs of the Company.
The Committee also fulfills its duties with respect to the Compensation Discussion and Analysis and Human Resources Committee Report portions of the proxy statement, as described in the Committee’s Charter.
The Compensation Discussion and Analysis has been prepared by management of the Company. The Company is responsible for the Compensation Discussion and Analysis and for the disclosure controls relating to executive compensation. The Compensation Discussion and Analysis is not a report or disclosure of the Human Resources Committee.
The Human Resources Committee met with management of the Company and the Committee’s outside consultant to review and discuss the Compensation Discussion and Analysis. Based on Executivethe foregoing review and discussions, the Human Resources Committee recommended to the Board of Directors that the Compensation Discussion and Analysis be included in this proxy statement and the Company’s 2006Form 10-K, and the Board approved that recommendation.
Human Resources Committee:
Richard A. Liddy, Chairman
Gordon R. Lohman
Richard A. Lumpkin
Harvey Saligman
Patrick T. Stokes
Compensation Discussion and Analysis

The philosophy of

In this Compensation Discussion and Analysis (or “CD&A”), references to “the Committee” are to the Human Resources Committee of Ameren Corporation’sthe Board of DirectorsDirectors. We use the term “Executives” to refer to the employees listed in the Summary Compensation Table.
Guiding Principles and Policies
Our philosophy for compensation of the executive officers of Ameren Corporation and its subsidiaries (collectively referred to in this Report as “Ameren”)Executives is to provide a competitive total compensation program that is based on the size-adjusted median of the range of compensation paid by similar utility industry companies, adjusted for Ameren’sour short- and long-term performance and the individual’s performance. The adjustment for Ameren’sour performance aligns the interestlong-term interests of management with that of our shareholders to maximize shareholder value. Accordingly,The programs in place for 2006 support the Human Resources Committee,pay-for-performance philosophy that we utilize.
Overview of Executive Compensation Program Components
In 2006, our compensation program for the Executives consisted of several compensation elements, each of which is comprised entirely of independent Directors, makes annual reviews ofdiscussed in more detail below. At the compensation paid to the executive officers of Ameren in order to (i) support Ameren’s overall business strategy and objectives; (ii) attract and retain key executives; (iii) link compensation with business objectives and Ameren’s performance; and (iv) provide competitive compensation opportunities. The Human Resources Committee retains an executive compensation consultant who provides market information on executive compensation. The executive compensation consultant was engaged by and reports to the Human Resources Committee. In reviewing and approving compensation actions for Chief Executive Officer Rainwater and the other executive officers, the Human Resources Committee evaluated Ameren’s performance in 2005 versus financial and non-financial goals, as described in this Report. The Human Resources Committee’s compensationCompany, decisions with respect to one element of pay


27


tend not to impact other elements of pay. The following are the five highest paid officersmaterial elements of Amerenour compensation program for the Executives:
• base salary;
• short-term incentives;
• long-term incentives, specifically our Performance Share Units Program;
• retirement benefits; and
• change of control protection.
Our Common Stock ownership requirements applicable to the Executives are discussed in this CD&A as well as under “SECURITY OWNERSHIP —Stock Ownership Requirements —Stock Ownership Requirement for Officers” above.
We also provide various welfare benefits to the Executives on the same basis as we provide to all salaried employees. We provide modest perquisites and other personal benefits to the Executives. We do not have a corporate aircraft and do not provide cars for the Executives for travel to and from the office nor do we provide or reimburse for country club memberships for any Executive. None of the Executives received perquisites or other personal benefits in an amount of $10,000 or more in 2006.
Market Data and Peer Group
The Committee’s consultant, Hewitt, collects and analyzes comprehensive market data annually, including base salary, target short-term incentives (non-equity incentive plan compensation) and long-term incentives opportunities, and benefits and perquisites periodically.
The elements of pay are benchmarked both individually and in total to the same comparator group.
To develop market figures, compensation opportunities for the Executives are compared to the compensation opportunities for comparable positions at companies similar to us, defined as regulated utility industry companies in a revenue size range approximately one-half to double our size. Hewitt uses various statistical techniques to adjust the market data to be appropriate for our revenue size.
We provide compensation opportunities at the size-adjusted median of the Hewitt data, and design our incentive plans to pay significantly more or less than the target amount when performance is above or below target performance levels, respectively. Thus, our plans are designed to result in payouts that are market-appropriate given our performance for that year or period.
The companies identified as the peer group used to develop 2006 compensation opportunities are listed below. The list is subject to change each year depending on the availability of the companies’ data through Hewitt’s database, and the continued appropriateness of the companies.
AGL ResourcesEdison InternationalPublic Service Enterprise Group, Inc.
CenterPoint EnergyFPL GroupSCANA Corporation
Cinergy Corp. NiSource Inc.Sempra Energy
CMS EnergyPepco Holdings, Inc.Southern Company
Dominion Resources, Inc. PG&E CorporationTXU Corp.
DTE Energy CompanyPPL CorporationWGL Holdings
Mix of Pay
We believe that both cash compensation and non-cash compensation are appropriate elements of a total rewards program. Cash compensation is current compensation (i.e., base salary and annual incentive awards), while non-cash compensation is generally long-term compensation (i.e., equity based incentive compensation).


28


A significant percentage of total compensation is allocated to short-term and long-term incentives as a result of the philosophy mentioned above. There is no pre-established policy or target for the allocation between either cash and non-cash or short-term and long-term compensation. Rather, the Committee reviews market data provided by Hewitt to determine the appropriate level and mix of incentive compensation. The allocation between current and long-term compensation is based primarily on competitive market practices relative to base salaries, annual incentive awards and long-term incentive award values.
Base Salary
Base salary compensates for competence and sustained performance in the executive role, and is a standard pay element. Our base salary program is designed to provide the Executives with market competitive salaries based upon role, experience, competence and performance.
The market data referenced above assists in defining the pay parameters for each Executive. Based on this data, the scope of each Executive’s role, and internal pay equity, a base salary range is established for each position. The base salary range is +/−20% of the established market rate for the position. The base salary of each Executive is managed within this pay range.
Mr. G.L. Rainwater (our Chairman, President and Chief Executive Officer) recommended a 2006 base salary increase for each of the other Executives considering their then-current salary in relation to the market median, experience and sustained individual performance and results. These recommendations were presented to the Committee for discussion and approval at the December 2005 Committee meeting. Increases were approved based on the market data and base salary range, as well as internal pay equity, experience, individual performance and the need to retain an experienced team. Performance takes into account competence, initiative, contribution to achievement of our goals and leadership.
The Committee consulted with Hewitt in executive session at its December 2005 meeting to determine and approve Mr. Rainwater’s base salary increase. The Committee’s decision was influenced by the above-mentioned market data and Mr. Rainwater’s relatively short time in his position, as well as his performance.
Base salary increases were effective January 1, 2006.
Short-Term Incentive Compensation: Executive Incentive Plan
Our short-term incentive compensation program element is entitled the Executive Incentive Plan (“EIP”). The EIP rewards our annual achievement of earnings per share (“EPS”) goals and the Executive’s business unit and individual performance. The EIP focuses attention on achievement of financial goals and on business unit and individual performance that are expected to increase shareholder value.
The amounts listed in columns (d), (e) and (f) of the Grants of Plan-Based Awards Table represent the potential range of cash awards for the EIP for 2006 and are based on a percentage of each Executive’s base salary at the end of 2006.
In order to ensure that amounts are fully deductible for tax purposes, the Committee set a limitation on 2006 short-term incentive payouts for each Executive of 0.5% of our 2006 net income. The Committee then used negative discretion as provided under Section 162(m) of the IRC to arrive at actual, lower 2006 payouts based on our performance for the year. By setting the limitation on payouts, the Committee ensured that such payouts met the definition of performance-based pay for tax purposes and thus, were fully deductible.
The payment of all of the short-term incentive award opportunities was dependent on our 2006 EPS achievement. However, 50% of the award funded by EPS achievement was subject to adjustment downward based on the performance of the individual Executives and the business unit they were responsible for leading in 2006. The Committee also reserves the right to modify EPS achievement levels under exceptional circumstances.


29


The range of EPS goals for 2006 is shown below. Goals are set each year with reference to many factors, including the history of financial results, the expected business environment, fuel prices affecting our business operations, operating costs and board expectations.
       
    Payout as a
Level of Performance EPS Percent of Target
Maximum $3.35  150%
Target $3.15  100%
Threshold $2.95  50%
Below threshold Less than $2.95  0%
       
The actual amounts of short-term incentive awards relating to the 2006 EIP are being paid in March 2007 and are set forth under column (g) entitled Non-Equity Incentive Plan Compensation in the Summary Compensation Table. Prior to the February 2007 Committee meeting, the forecasted EIP EPS achievement and recommended short-term incentive awards for the Executives other than Mr. Rainwater were forwarded by Mr. Rainwater to the Committee for review. In accordance with the terms of the EIP, the Committee, at the February meeting, adjusted the 2006 EPS achievement level under the EIP to a level that resulted in funding of 60% of the target EIP compensation to reflect the exceptional effects of extraordinary weather events and regulatory rulings. As noted above, 50% of the award for each Executive was dependent on business unit and individual performance as determined by the Committee, and some individual Executive awards were lower than 60% of target.
The adjustment to EPS was made in recognition of several other factors, including the larger number of and extreme relative severity of the storms in Ameren’s service areas compared to prior years, the receipt by Ameren Corporation’sof the Edison Electric Institute “Emergency Recovery Award” for outstanding efforts to restore electric power in the wake ofback-to-back storms in July 2006, and improved generation plant performance. The actions of the Committee and the Board of Directors. Followingreflected the annual reviews,view that the Human Resources Committee authorizes appropriate changes toExecutives demonstrated the three basic variable components of theleadership qualities that our executive compensation program which are:

was designed to foster and reward.
Base salary,

Long-Term Incentives: Performance Share Unit Program (“PSUP”)
We began granting performance share units in 2006.  In the five years prior to 2006, we granted performance-based restricted stock. Both are discussed below.
In General
A performance-based short-term incentive plan,performance share unit (“PSU” or “share unit”) is the right to receive a share of our Common Stock if certain long-term performance criteria are achieved and the Executive remains an Ameren employee.
Role of the PSUP
The PSUP, which is governed by the shareholder-approved 2006 Omnibus Incentive Compensation Plan, plays the following role in the compensation program:
• provides compensation dependent on our three-year Total Shareholder Return (“TSR”) calculated as described below under “— 2006 Grants”) versus utility industry peers, as identified below;
• provides some payout (below target) if three-year TSR is below the 30th percentile but EPS in each year of the three-year performance period is at least equal to the dividend paid of $2.54 per Ameren common share in 2005;
• accrues dividends during the performance period, as declared and paid, in order to further align executives’ interests with those of shareholders;
• promotes retention of executives during a three-year performance and vesting period; and
• shares our Common Stock price increases and decreases over a five-year period.


30

A performance-based long-term incentive plan.

First,


PSUP Design
We designed the PSUP to accomplish the following:
• align executives’ interests with shareholder interests:  awards are denominated in our Common Stock units and paid out in Common Stock. Payouts are dependent on our Common Stock’s performance, and are limited to target if TSR is negative;
• competitive with market practice:  the majority of regulated utility companies use plans similar to this program, and with this performance measure;
• promote Common Stock ownership:  payout of earned awards is made 100% in Common Stock, with dividends on Common Stock, as declared and paid, reinvested into additional share units throughout the performance period. Share units are restricted from sale for two years once earned;
• allow executives to share in the returns created for shareholders:  returns for shareholders include dividends as declared and paid and this is reflected in the plan performance measure and rewards; and
• retentive:  annual competitive grants with a three-year vesting and performance period provide incentive for executives to stay with the Company and manage the Company in the long-term interests of the Company and its shareholders.
Accounting treatment was taken into account in evaluating and setting base salariesdesigning the PSUP. PSUs are intended to qualify for the “performance-based compensation” exception from the $1 million cap on deductibility of executive officers, includingcompensation imposed by Section 162(m) of the ChiefIRC.
2006 Grants
For 2006, a target number of PSUs was granted to each Executive Officer of Ameren, the Human Resources Committee considers: individual responsibilities, including changes which may have occurred since the prior review; individual performance in fulfilling responsibilities, including the degree of competence and initiative exhibited; relative contributionpursuant to the results2006 Omnibus Incentive Compensation Plan as reflected in column (h) of operations; the effectGrants of economic changesPlan-Based Awards Table. The proposed 2006 grant sizes were included in our proxy statement relating to the 2006 annual meeting.
Grant sizes were calculated primarily considering the market data mentioned above, and secondarily considering internal pay equity.
The actual number of PSUs earned will vary from 0% to 200% of the target number of PSUs granted to each Executive, based primarily on salary structure; and comparisons with

compensation paid by similarour2006-2008 TSR relative to a utility industry companies.peer group and contingent on continued employment during2006-2008. The Human Resources Committeethreshold and maximum amounts of PSU awards are reflected in columns (g) and (i) of the Grants of Plan-Based Awards Table.

Once PSUs are earned, they will continue to rise and fall in value with our Common Stock price during 2009 and 2010, after which they will be paid out in our Common Stock. The Executives cannot vote share units or transfer them until they are paid out. Final payment of earned and vested share units will be made even if the Executive has left our employ, unless there has been a termination for cause.


31


The following graphic illustrates how the PSUP works.
(GRAPH)
The PSUP performance measure is Total Shareholder Return, calculated generally as follows.
(GRAPH)
PSUP Peer Group
The criteria used to develop the PSUP peer group for2006-2008 is shown below. In order to be counted in the final calculations, a company must still be in existence and have a ticker symbol at the end of the performance period.
• Classified as a transmission and distribution, integrated electric and gas, or diversified energy company as determined by Standard & Poor’s Ratings Service (“S&P”) in its company classifications.
• Market capitalization greater than $2 billion (as of August 5, 2005).
• Minimum S&P credit rating of BBB- (investment grade).
• Dividends flat or growing over the2003-2004 period.
• Beta (a measure of a stock’s volatility in comparison to the market as a whole) within .25 of our Beta over the last five years.
• Not an announced acquisition target.


32


For the2006-2008 period, the 25 companies listed below satisfied the above criteria as of December 2005, and comprised the PSUP peer group. These peer group companies are not found it practicableentirely the same as the peer companies used for market pay comparisons because inclusion in this group was not dependent on a company’s size relative to us or their participation in an executive pay database. For example, several of the PSUP peer group companies are considerably larger than us and haswould not attemptedbe appropriate for inclusion in a peer group used to assign relative weightsdetermine the market for compensation.
Consolidated Edison, Inc. FPL Group, Inc.PPL Corporation
Dominion Resources, Inc. Great Plains Energy Inc.Progress Energy, Inc.
DTE Energy CompanyKeyspanPuget Energy
Duke EnergyNortheast UtilitiesSCANA Corporation
Energy EastNSTARSouthern Company
Entergy CorporationOGE EnergyVectren Corporation
Exelon CorporationPepco Holdings, Inc.Wisconsin Energy
FirstEnergy CorporationPinnacle West Capital CorporationWPS Resources Corporation
Xcel Energy, Inc.
PSUP Performance/Payout Relationship
Once our2006-2008 Total Shareholder Return is calculated and compared to peers, the specific factors considered in determiningscale below determines the Chief Executive Officer’s and other executive officers’ compensation. During 2005, Mr. Gary L. Rainwater served as Chief Executive Officerpercent of Ameren Corporation and its principal subsidiaries, Union Electric Company, Central Illinois Public Service Company, CILCORP Inc., Central Illinois Light Company and Illinois Power Company. a target PSU award that is paid. Payout for performance between points is interpolated on a straight-line basis.
Payout (% of Share
Performance
Units Granted)
90th percentile +200%)  If TSR is negative over the three-year
70th percentile150%)  ßperiod, the plan is capped at 100% of
50th percentile100%)  target regardless of performance vs. peers
30th percentile50%
Less than 30th percentile (EPS each year = $2.54 or greater)30%
Less than 30th percentile (EPS each year¹ $2.54 or greater)
0% (No payout)
The annual base salaries of allfirst PSUP performance period will not end until December 31, 2008. Thus, there is no earned amount to report for the officers listedExecutives in the Summary Compensation Table of this proxy statement were fixed forstatement.
Performance-Based Restricted Stock
Performance-based restricted stock was awarded from 2001 through 2005 as disclosed in that Table.

The second component ofunder the executive compensation program is a performance-based Executive Incentive Compensation Plan (the “Short-Term Incentive Plan”) established by the Ameren Corporation Board of Directors, which provides specific, direct relationships between corporate results and Short-Term Incentive Plan compensation. For 2005, Ameren consolidated year-end earnings per share (EPS) target levels were set by the Human Resources Committee. There were three EPS performance levels established for 2005. “Threshold” is the minimum EPS performance level that incentives or bonuses will be funded; “Target” is the goal or desired level of EPS performance; and “Maximum” is the highest level of incentive funding based on exceptional EPS performance. If EPS reaches at least the Threshold target level, the Human Resources Committee authorizes cash incentive payments with respect to the EPS performance level within prescribed ranges based on individual performance and degree of responsibility. If EPS fails to reach the Threshold target level, no payments are made. Under the Short-Term Incentive Plan for 2005, the incentive payment to the Chief Executive Officer of Ameren could have ranged from 0 to 127.5 percent of base salary. For 2005, the actual cash incentive payment to Chief Executive Officer Rainwater was 123.25 percent of base salary. This reflects a level of achievement exceeding the Target but short of the Maximum level in 2005 EPS. The Summary Compensation Table lists the Short-Term Incentive Plan cash bonus awards for 2005 (which were paid in 2006) for each executive listed.

The third component of the 2005 executive compensation program is theCompany’s Long-Term Incentive Plan of 1998 (the “Long-Term Incentive Plan”), which also ties compensation to performance.1998. The Long-Term Incentive Plan was approved by Ameren Corporation shareholders at its 1998 annual meeting and provides for the grant of options, restricted stock, performance awards, stock appreciation rights and other awards. The Human Resources Committee determines who participates in the Long-Term Incentive Plan and the number and types of awards to be made. It also sets the terms, conditions, performance requirements and limitations applicable to each award under the Long-Term Incentive Plan. Since 2001, awards have been exclusively in the form of restricted stock which has the potential to vest over a seven-year period from the date of grant (approximately one-seventhone seventh on each anniversary date) based upon the achievement of. Vesting occurs only if we achieve certain Ameren EPS performance levels (whichwhich correspond to the levels established for the Short-Term Incentive Plan) and prior to February 2006, upon the officer’s achievement of required stock ownership levels based on position and salary.EIP. There will beis no annual vesting if the EPS performance does not reach a minimum level that is established annually over the seven-year vesting period. The vesting period is reduced from seven years to three years if Ameren’s EPS achieves a prescribed growth rate over the three-year period. The Executives cannot receive more than the original restricted stock grants plus dividend appreciation on shares granted under the Long-Term Incentive Plan of 1998.

Dividends paid on restricted shares are reinvested in additional shares of Ameren Common Stock, which vest concurrently with the restricted shares. The Executives are entitled to voting privileges associated with the restricted shares to the extent the restricted shares have not been forfeited.
Prior to February 2006, restricted stock vesting was also conditioned upon the Executive’s achievement of required stock ownership levels based on position and salary. In February 2006, the Human Resources Committee recommended and the Board of Directors approved the elimination of the stock ownership requirement as a condition to


33


vesting in the restricted stock awards granted under the Long-Term Incentive Plan of 1998 to facilitate the transition from that plan to the new 2006 Omnibus Incentive Compensation Plan currently proposed for shareholder approval. Executive officers cannot receive more than the original restricted stock grants plus dividend appreciation on shares granted under the Long-Term Incentive Plan.

In 2005, Chief Executive Officer Rainwater was granted a performance-based restricted stock award of 13,279 shares of Ameren Common Stock valued at $680,018 (85 percent of Chief Executive Officer Rainwater’s 2005 base salary) based on the closing market price of $51.21 per share on

February 11, 2005, the date the restricted stock was awarded. The Summary Compensation Table lists theapproved by shareholders in May 2006. No new restricted stock awards were made during 2005 for each executive listedto the Executives in 2006.

Regarding the vesting of awards due to vest based on 2006 EPS performance, the same adjustments were made to EPS for 2004.

Chief Executive Officer Rainwater’s proposedthat event as were made for 2006 EIP payout. This resulted in vesting of 60% of the awards eligible to vest based on 2006 performance.

Retirement Benefits
Retirement benefits provide post-employment security to our employees. There are three primary retirement benefit programs applicable to the Executives:
• employee benefit plans that are available to all of our employees, including 401(k) savings and tax-qualified retirement plans;
• the Supplemental Retirement Plan (“SRP”) provides the Executives a benefit equal to the difference between the benefit that would have been paid if IRC limitations were not in effect and the reduced benefit payable as a result of such IRC limitations; and
• the deferred compensation plans (“DCP”) provide the opportunity to defer to future years taxability of part of base salary and all non-equity incentive compensation at an identified interest rate. It enhances retirement savings for the Executives.
A more detailed explanation of retirement benefits applicable to the Executives is presented, reviewedprovided in this proxy statement under the caption “— Pension Benefits” below.
Change of Control Protections
“Change of Control” protections provide severance pay and, analyzedin some situations, vesting or payment of long-term incentive awards, upon a Change of Control of the Company. The arrangements provide market-level payments in the contextevent of allan involuntary termination not for “Cause” or a voluntary termination for “Good Reason.” Definitions of the components“Change of his total compensation over the course of at least two meetings, generally beginning with the last Human Resources Committee meeting of the year preceding any base salary adjustmentControl,” “Cause” and award under either the Short-Term Incentive Plan or the Long-Term Incentive Plan and ending with the first meeting of the Human Resources Committee of the year in which any such adjustment or award is made. In the interim, members of the Human Resources Committee have time to ask for additional information and to raise and discuss further questions.

In determining the 2005 compensation of Chief Executive Officer Rainwater,“Good Reason”, as well as compensation formore complete descriptions of Change of Control protections are found below under the other executive officers, including salary, bonus, long-term incentive compensation, perquisitescaption “— Other Potential Post-Employment Payments —Change of Control Protection —Change of Control Severance Plan.” The Amended and other benefits, including potential payoutsRestated Change of Control Severance Plan was filed as Exhibit 10.5 to the Company’s Current Report onForm 8-K dated February 16, 2006.

We believe that providing limited protections to the Executives upon a change of control are in shareholders’ best interests because doing so serves to maintain a stable executive team during the process and is helpful in hiring executives into the Company. The triggers are structured so that payment and vesting occur only upon the occurrence of both a change of control the Human Resources Committee considered and applied the factors discussed above. Based upon its review of Ameren’s executive compensation program and the advice and guidance that the Human Resources Committee has received from its executive compensation consultant, the Human Resources Committee believes that the long-term incentive componentloss of the Company’s executive compensation program was belowExecutive’s position.
Common Stock Ownership Requirement
In 2005, the size-adjusted market median.

The Board of Directors, acting onupon the recommendation of the Human ResourcesNominating and Corporate Governance Committee, unanimously approvedadopted a new incentive compensation plan with both short-term and long-term incentive components, subject to shareholder approval. This new plan, the 2006 Omnibus Incentive Compensation Plan, attached to this proxy statement as Appendix B and described in Item 2 of this proxy statement, will provide a basis for future equity compensation awards designed to be competitive with similar utility industry companies that are competitors for executive talent and to focus on both short- and long-term performance as measured by financial results and value creation for shareholders. Performance measures under the Plan are designed to support the Company’s business strategies. Beginning in 2006, the Human Resources Committee expects to make greater use of performance share units in delivering annual long-term awards. These awards also support the stock ownership guideline applicable to the Company’s officers. Executives. In 2006, the Board replaced the guideline with a requirement, revised the number of shares covered by the requirement and included Common Stock retention provisions in the event an officer is not in compliance.

The requirement fosters long-term Common Stock ownership guidelineand aligns the interests of the Executives and shareholders. The requirement provides that, within five years of either the January 1, 2007 effective date or the Executive’s initial election to such office, each Executive is required to own shares of our Common Stock valued as a percentage of base salary as follows:
• Mr. Rainwater: 3 times base salary;
• Messrs. Baxter and Voss: 2 times base salary; and
• Messrs. Sullivan and Naslund: 1 times base salary.


34


At any time an Executive has not satisfied the applicable requirement, such officer must retain at least 50% of the net shares delivered to him pursuant to awards granted after January 1, 2012 under our equity compensation programs.
Timing of Compensation
The Board and the Committee establish meeting schedules annually, well in advance of each meeting. Equity incentive compensation awards were made at regularly scheduled meetings.
Following is a discussion of the timing of compensation decisions for 2006 at the Company:
• base salary changes for 2006 were determined at the December 2005 Committee meeting;
• Executive Incentive Plan EPS goals for 2006 were set at the December 2005 Committee meeting; and
• PSU grants to the Executives were made at the February 2006 Committee meeting subject to shareholder approval of the 2006 Omnibus Incentive Compensation Plan, which occurred at the annual meeting of shareholders in May 2006. The Committee typically makes long-term incentive grants at its February meeting.
Impact of Prior Compensation
Amounts realizable from prior compensation did not serve to increase or decrease 2006 compensation amounts. The Committee’s primary focus was on achieving market-level compensation opportunities.
Factors Considered in Decisions to Increase or Decrease Compensation Materially
Market data, retention needs and internal pay equity have been the primary factors considered in decisions to increase or decrease compensation opportunities materially. Corporate and individual performance are the primary factors in determining the ultimate value of those compensation opportunities.
Role of Executive Officers
The Chief Executive Officer is five times annual base salary; other officers have stock ownership guidelines ranging from two to four times annual base salary.

(Mr. Rainwater) with the assistance of the Senior Vice President and Chief Human Resources Committee:

Richard A. Liddy, Chairman

Gordon R. Lohman

Richard A. Lumpkin

Harry Saligman

Patrick T. Stokes

Human ResourcesOfficer of Ameren Services (Ms. Donna Martin) recommended to the Committee Interlockscompensation for the other Executives. Mr. Rainwater was not involved in determining his own compensation.

Mr. Rainwater, the Chief Operating Officer (Mr. Voss), the Chief Financial Officer (Mr. Baxter), the General Counsel (Mr. Sullivan) and Insider Participation

The current membersMs. Martin provided staff support to the Committee in the design of the Human ResourcesPSUP. Mr. Rainwater, Ms. Martin, Mr. Baxter and Mr. Sullivan provided staff support to the Committee in the 2006 redesign of the Boardchange of Directors, Messrs. Liddy, Lohman, Lumpkin, Saligman and Stokes, were not at any time during 2005 or at any other time an officer or employeecontrol severance plan.

Company Policy Regarding the Economic Risk of the Company, and no member had any relationship with the Company requiring disclosure under applicable SEC rules. No executive officer of the Company has served on the board of directors or compensation committee of any other entity that has or has had one or moreCommon Stock Ownership
Our Section 16 Trading Reporting Program prohibits executive officers who served as a member of the Company’s Board of Directors or the Human Resources Committee during 2005.

Performance Graph

The following graph shows Ameren’s (NYSE ticker symbol AEE) cumulative total shareholder return during the five fiscal years ended December 31, 2005. The graph also shows the cumulative total returns of the S&P 500 Index and the Edison Electric Institute (“EEI”) Index. The comparison assumes $100 was invested on January 1, 2001directors from engaging in Amerenderivative transactions with respect to our Common Stock and in eachpledges of our Common Stock.

Other Compensation Matters
We do not have any written or unwritten employment agreements with any of our Executives. Each Executive is an employee at the will of the indices shownCompany.


35


Compensation Tables and assumes that all of the dividends were reinvested.

LOGO

(a)Edison Electric Institute Index of 100 investor-owned electric utilities.

Note: Ameren management consistently cautions that the stock price performance shown in the graph above should not be considered indicative of potential future stock price performance.

   1/01/2001

  01/01/2002

  01/01/2003

  01/01/2004

  01/01/2005

  01/01/2006

AMEREN

  $100.00  97.12  101.32  118.91  136.89  146.83

S&P 500 INDEX

  $100.00  88.13  68.65  88.36  97.96  102.79

EEI INDEX

  $100.00  91.21  77.77  96.04  117.97  136.91

Compensation TablesNarrative Disclosures

The following tables settable sets forth compensation information for the Company’s Named Executive Officersour Executives for services rendered in all capacities to the Company and its subsidiaries. No options were grantedsubsidiaries in fiscal year 2005 to any Named Executive Officer.

SUMMARY COMPENSATION TABLE

Name and Principal Position(1)


 Year

 Annual Compensation

 Long-Term
Compensation Awards


  
  

Salary

($)


 

Bonus

($)(2)


 

Other

Annual
Compensation
($)(3)


 Restricted
Stock
Awards
($)(4)


 

Securities
Underlying
Options

(#)


 

All Other
Compensation

($)(5)


G. L. Rainwater

 2005 800,000 986,000 -   680,018 -   70,085

Chairman, Chief

 2004 650,000 507,000 -   552,512 -   52,885

Executive Officer

 2003 500,000 397,500 -   374,987 -   44,861

and President, Ameren,

CILCORP, UE and Ameren

Services; Chairman and Chief

Executive Officer, CIPS, CILCO

and IP

              

W. L. Baxter

 2005 470,000 408,900 -   352,478 -   19,389

Executive Vice

 2004 420,000 273,000 -   315,019 -   19,310

President and

 2003 340,834 287,340 -   191,984 -   18,525

Chief Financial Officer, Ameren,

CIPS, UE, Ameren Services, AEG,

CILCORP, CILCO and IP

              

T. R. Voss

 2005 400,000 348,000 -   299,988 -   34,885

Executive Vice

 2004 310,000 201,500 -   186,009 -   28,849

President and

 2003 270,417 202,900 -   156,019 -   26,883

Chief Operating Officer, Ameren;

Senior Vice President, UE, CIPS,

Ameren Services, CILCORP,

CILCO and IP

              

S. R. Sullivan

 2005 350,000 304,500 -   210,012 -   23,085

Senior Vice

 2004 290,000 150,800 -   174,007 -   18,723

President,

 2003 254,771 155,760 -   98,198 -   18,466

General Counsel and Secretary,

Ameren, CIPS, UE, Ameren

Services, AER, AEG, AE,

CILCORP, CILCO and IP

              

C. D. Naslund

 2005 300,000 292,500 -   180,003 -   24,718

Senior Vice

 2004 231,667 110,500 -   88,000 -   20,615

President and

 2003 209,500 106,420 -   83,812 -   19,319

Chief Nuclear Officer, UE

              

2006.
Summary Compensation Table
                                              
                     
Change in
      
                     Pension
      
                     Value and
      
                     Nonqualified
      
                  Non-Equity
  Def.
      
Name and Principal
           Stock
  Option
  Incentive Plan
  Comp.
  All Other
   
 Position at 
     Salary(2)
  Bonus(2)
  Award(3)
  Awards(4)
  Compensation(2)(5)
  Earnings(6)
  Compensation(7)
  Total
December 31, 2006(1)
  Year
  ($)
  ($)
  ($)
  ($)
  ($)
  ($)
  ($)
  ($)
(a)  (b)  (c)  (d)  (e)  (f)  (g)  (h)  (i)  (j)
G.L. Rainwater   2006    900,000        1,722,938        243,000    352,088    26,366    3,244,392 
Chairman, President and Chief Executive Officer, Ameren                                             
W.L. Baxter   2006    500,000        491,898        180,000    76,060    22,042    1,270,000 
Executive Vice President and Chief Financial Officer, Ameren                                             
T.R. Voss   2006    440,000        468,068        118,800    151,572    18,250    1,196,690 
Executive Vice President and Chief Operating Officer, Ameren                                             
S.R. Sullivan   2006    380,000        348,511        119,700    92,733    9,611    950,555 
Senior Vice President, General Counsel and Secretary, Ameren                                             
C.D. Naslund   2006    335,000        215,882        100,500    94,675    13,750    759,807 
Senior Vice President and Chief Nuclear Officer, UE                                             
                                              
(1)Includes compensation received as an officer of Ameren and its subsidiaries, except that Mr. Naslund serves as an officer of UE only and not of Ameren or its other subsidiaries.
(2)AmountsAll cash compensation received by each Executive for each fiscal year represent bonus compensation earned for2006 is found in either the Salary or Non-Equity Incentive Plan Compensation column of this Table. The amounts that year payable inwould generally be considered “bonus” awards are found under the subsequent year.Non-Equity Incentive Plan Compensation column.
(3)The amounts in column (e) reflect the dollar amount recognized for financial statement reporting purposes for the fiscal year ended December 31, 2006, in accordance with FAS 123R of restricted stock awards under our Long-Term Incentive Plan of 1998 and PSU awards under our 2006 Omnibus Incentive Compensation Plan without regard to estimated forfeitures related to service-based vesting conditions and thus, include amounts from awards granted in and, in the case of restricted stock awards, prior to 2006. Assumptions used in the calculation of these amounts are described in Note 11 to our audited financial statements for the fiscal year ended December 31, 2006 included in our 2006Form 10-K.
(4)None of the Executives received any option awards in 2006.
(5)Represents payouts for 2006 performance under the EIP. See “— Compensation Discussion and Analysis” for a discussion of how amounts were determined.
(6)Amounts shown in column (h) are the sum of (1) the increase in the actuarial present value of each Executive’s accumulated benefit under all defined benefit and actuarial pension plans (including the SRP) from December 31, 2005 to December 31, 2006 and (2) the difference between the interest rate credited in the Company’s deferred compensation plansand 120% of the Internal Revenue Service (“IRS”) long-term Applicable Federal Rate published by the IRS and calculated as of January 1, 2007. The table below shows the allocation of these amounts for each Executive. For 2006, the applicable interest rate was 7.86%. The above-market earnings equal that amount minus 120% of the Applicable Federal Rate of 5.70% published by the IRS, and calculated as of January 2007.


36


           
   Pension Plan
  Deferred Compensation Plans 
   Increase
  Above-Market Interest
 Name  ($)  ($)
Rainwater   297,990    54,098 
Baxter   67,470    8,590 
Voss   133,044    18,528 
Sullivan   78,528    14,205 
Naslund   81,356    13,319 
           
For assumptions and methodology regarding the determination of pension values, please refer to the footnotes under the Pension Benefits Table.
(7)None of the Executives received perquisites and other personal benefits are not disclosed in accordance with SEC rules because they do not exceed the lesseraggregate amount of $50,000$10,000 or 10% of any Named Executive Officer’s total annual salary and bonus.more.
(4)

This column is based

The amounts in column (i) reflect for each Executive matching contributions allocated by the Company to each Executive pursuant to the Company’s 401(k) Plan, which is available to all salaried employees, and the cost of insurance premiums paid by the Company with respect to term life insurance. The cost of the insurance premium for Mr. Rainwater was $16,466. Each Executive is responsible for paying income tax on the amount of the insurance premium.
The following table provides additional information with respect to stock-based awards, the value of which was provided in the Stock Awards column of the closing market price of Ameren Common Stock on the date the restricted stock was awarded (for 2005, $51.21 per share on February 11, 2005; for 2004, $46.34 per share on February 13, 2004; and for 2003, $39.74 per share on February 14, 2003). The aggregate number of restricted shares of Ameren Common Stock held at December 31, 2005 and the value of such holdings, based on the number of restricted shares for which restrictions have not lapsed times the closing market price at December 30, 2005 ($51.24 per share), was 57,314 shares and $2,936,769 for Mr. Rainwater; 28,339 shares and $1,452,090 for Mr. Baxter; 16,646 shares and $852,941 for Mr. Voss; 17,247 shares and $883,736 for Mr. Sullivan; and 10,919 shares and $559,490 for Mr. Naslund. Restricted shares have the potential to vest

Footnotes to Summary Compensation Table, (Cont.)

and the potential range of payouts associated with the EIP.
                                                           
          Grants of Plan-Based Awards Table
                 
                                  All Other
   All Other
       Grant
 
      Shareholder
                           Stock
   Option
       Date
 
      Approval of
   Estimated Possible Payouts Under
   Estimated Future Payouts
   Awards:
   Awards:
   Exercise or
   Fair
 
      2006 Omnibus
   Non-Equity Incentive Plan
   Under Equity
   Number of
   Number of
   Base
   Value
 
      Incentive
   Awards(2)   Incentive Plan Awards(3)   Shares of
   Securities
   Price of
   of Stock
 
      Compensation
           Stock
   Underlying
   Option
   and Option
 
   Grant
  Plan
   Threshold
   Target
   Maximum
   Threshold
   Target
   Maximum
   or Units
   Options(4)
   Awards(4)
   Awards(5)
 
Name
  Date(1)
  Date(1)
   ($)
   ($)
   ($)
   (#)
   (#)
   (#)
   (#)
   (#)
   ($/Sh)
   ($)
 
  (a)  (b)  (c)   (d)   (e)   (f)   (g)   (h)   (i)   (j)   (k)   (l)   (m) 
 Rainwater  EIP:2/10/2006        405,000    810,000    1,215,000                             
   PSUP:2/10/2006   PSUP:5/2/2006                16,779    55,928    111,856                3,136,066 
Baxter  EIP:2/10/2006        150,000    300,000    450,000                             
   PSUP:2/10/2006   PSUP:5/2/2006                5,327    17,755    35,510                995,581 
Voss  EIP:2/10/2006        132,000    264,000    396,000                             
   PSUP:2/10/2006   PSUP:5/2/2006                4,688    15,624    31,248                876,089 
Sullivan  EIP:2/10/2006        114,000    228,000    342,000                             
   PSUP:2/10/2006   PSUP:5/2/2006                4,049    13,494    26,988                756,653 
Naslund  EIP:2/10/2006        83,750    167,500    251,250                             
   PSUP:2/10/2006   PSUP:5/2/2006                2,280    7,600    15,200                426,157 
                                                           
over a seven-year period from date of grant (approximately one-seventh
(1)The PSU awards were granted on each anniversary date) based upon the achievement of certain Company EPS performance levels. The vesting period is reduced from seven yearsFebruary 10, 2006, subject to three years if Ameren’s ongoing EPS achieve a prescribed growth rate over the three-year period. In February 2006, the Board of Directors approved the elimination of stock ownership requirements as a condition to vesting in restricted shares to facilitate the transition from the Long-Term Incentive Plan of 1998, pursuant to which the restricted shares were awarded, to the new 2006 Omnibus Incentive Compensation Plan currently proposed for shareholder approval. See “Items You May Vote On – Item (2): Approvalapproval of the 2006 Omnibus Incentive Compensation Plan” above. UponPlan. The grant date of the occurrence of a “change in control” as defined in the Long-Term Incentive Plan of 1998, all restrictions and vesting requirements with respectPSU awards to the restricted stock terminate. Dividends paidExecutives is therefore May 2, 2006, the date of shareholder approval of the 2006 Omnibus Incentive Compensation Plan. See “— Compensation Discussion and Analysis” for a discussion of the timing of various pay decisions.
(2)The amounts shown in column (d) reflect the threshold payment level under the EIP which is 50% of the target amount shown in column (e). The amount shown in column (f) is 150% of such target amount. These amounts are based on restricted shares are reinvestedthe individual’s 2006 salary and position. See “— Compensation Discussion and Analysis” for information regarding the description of performance-based conditions.
(3)The amounts shown in additional sharescolumn (g) reflect the threshold PSU award which is 30% of Ameren Common Stock, which vest concurrently with the restricted shares.target amount shown in column (h). The Named Executive Officers are entitled to voting privileges associated withamount shown in column (i) is 200% of such target amount. See “— Compensation Discussion and Analysis” for information regarding the restricted shares toterms of the extentawards, the restricted shares have not been forfeited.
(5)Amounts includedescription of performance-based vesting conditions, and the following matching contributions tocriteria for determining the Company’s 401(k) plan, the dollar value of insurance premiums paid by the Company with respect to term life insurance and above-market earnings on deferred compensation. See “Arrangements With Named Executive Officers – Deferred Compensation Plans” below.amounts payable.


37


         Name         


(4)
Year

Matching 401(k) Plan

Contributions($)


Executive Term

Life Insurance

Premiums($)


Above Market

Earnings on Deferred
Compensation($)


None of the Executives received any option awards in 2006.

G. L. Rainwater

2005
2004
2003
9,600
9,851
9,047
14,842
11,122
7,792
45,643
31,912
28,022
(5)Represents the full grant date fair value of the PSU awards in 2006 determined in accordance with FAS 123R, based on the assumptions referenced in footnote (3) to the Summary Compensation Table.
Narrative Disclosure to Summary Compensation Table and Grants of Plan-Based Awards Table
See “—Compensation Discussion and Analysis”for further information regarding the terms of awards reported in the Summary Compensation Table and the Grants of Plan-Based Awards Table and for discussions regarding officer stock ownership requirements, dividends paid on equity awards, and allocations between short-term and long-term compensation.
The following table provides information regarding the outstanding equity awards held by each of the Executives as of December 31, 2006.
Outstanding Equity Awards at Fiscal Year-End Table
                                              
   Option Awards(1)
  Stock Awards
         Equity
              Equity
  Equity
         Incentive
              Incentive
  Incentive Plan
         Plan Awards:
              Plan Awards:
  Awards:
   Number of
  Number of
  Number
           Market
  Number of
  Market or Payout
   Securities
  Securities
  of Securities
        Number of
  Value of
  Unearned
  Value of Unearned
   Underlying
  Underlying
  Underlying
        Shares or
  Shares or
  Shares, Units, or
  Shares, Units, or
   Unexercised
  Unexercised
  Unexercised
  Option
     Units of Stock
  Units of Stock
  Other Rights
  Other Rights
   Options
  Options
  Unearned
  Exercise
  Option
  That Have
  That Have
  That Have
  That Have
   Exercisable
  Unexercisable
  Options
  Price
  Expiration
  Not Vested
  Not Vested
  Not Vested(2)
  Not Vested(3)
Name
  (#)
  (#)
  (#)
  ($)
  Date
  (#)
  ($)
  (#)
  ($)
(a)  (b)  (c)  (d)  (e)  (f)  (g)  (h)  (i)  (j)
Rainwater                               41,956    2,254,296 
Baxter                               18,270    981,647 
Voss                               14,873    799,126 
Sullivan                               11,588    622,623 
Naslund                               7,882    423,500 
                                              

W. L. Baxter

2005
2004
2003
8,422
10,480
9,619
2,109
1,688
1,285
8,858
7,142
7,621

T. R. Voss

2005
2004
2003
9,450
9,358
8,366
6,865
4,832
3,722
18,570
14,659
14,795

S. R. Sullivan

2005
2004
2003
7,379
6,808
7,406
1,796
1,355
1,031
13,910
10,560
10,029

C. D. Naslund

2005
2004
2003
9,506
9,381
8,484
3,209
2,103
1,827
12,003
9,131
9,008

AGGREGATED OPTION EXERCISES IN 2005

AND YEAR-END VALUES(1)

         Name         


  Shares
Acquired on
Exercise(#)


  Value
Realized
($)


  

Unexercised

Options at Year End(#)


  

Value of

In-the-Money

Options at Year End($)(2)


      Exercisable

  Unexercisable

  Exercisable

  Unexercisable

G. L. Rainwater

  8,150  163,448  - 0 -  - 0 -  - 0 -  - 0 -

W. L. Baxter

  3,525  72,897  - 0 -  - 0 -  - 0 -  - 0 -

T. R. Voss

  16,300  337,084  - 0 -  - 0 -  - 0 -  - 0 -

S. R. Sullivan

  3,525  70,606  - 0 -  - 0 -  - 0 -  - 0 -

C. D. Naslund

  9,725  185,677  - 0 -  - 0 -  - 0 -  - 0 -

(1)No options were granted by the Company in 2005.
(2)None of the Named Executive OfficersExecutives hold any options (exercisable or unexercisable) to purchase shares of the Company’s Common Stock.
(2)Represents outstanding grants of PSUs at threshold (due to lack of payout history) and restricted stock awards at target, based on historical payout levels.
The following table provides the outstanding shares of restricted stock and their potential vesting dates (at target performance).
                          
   # of Potential Shares Vesting (at Target) Each Year Including Projected Divdends
Name  3/1/08  3/1/09  3/1/10  3/1/11  3/1/12
Rainwater   8,705    7,078    5,126    4,187    2,597 
Baxter   4,352    3,720    2,776    2,251    1,347 
Voss   3,662    2,824    2,010    1,679    1,147 
Sullivan   2,596    2,079    1,581    1,302    801 
Naslund   1,993    1,536    1,098    939    688 
                          
The 2006 PSU awards under the 2006 Omnibus Incentive Compensation Plan vest, subject to Ameren achieving the required performance threshold and continued employment of the Executive, as of December 31, 2008 for all Executives. See “— Compensation Discussion and Analysis —Long-Term Incentives: Performance Share Unit Program (“PSUP”).
(3)The dollar value of the payout of 2006 PSU awards is based on achieving the threshold (minimum) performance goals for such awards. The dollar value of the payout of outstanding restricted stock awards is based on achieving target performance goals for such awards. Valuations are based on the closing price of $53.73 per share of Ameren’s Common Stock on the NYSE on December 29, 2006, the last business


38


day of 2006. There is no guarantee that, if and when the PSU awards and restricted stock awards vest, they will have this value.
The following table provides the amounts received upon exercise of options or similar instruments or the vesting of stock or similar instruments during the most recent fiscal year.
Option Exercises and Stock Vested Table
                     
    
   
   Option Awards(1)  Stock Awards
   Number of Shares
     Number of Shares
  Value
   Acquired on
  Value Realized
  Acquired on
  Realized on
   Exercise
  on Exercise
  Vesting(2)
  Vesting(3)
Name
  (#)
  ($)
  (#)
  ($)
(a)  (b)  (c)  (d)  (e)
Rainwater           5,156    269,813 
Baxter           2,550    133,442 
Voss           2,201    115,178 
Sullivan           1,554    81,321 
Naslund           1,199    62,744 
                     
(1)None of the Executives hold any options to purchase shares of our Common Stock.
(2)These shares were earned and vested under the restricted stock awards under the Long-Term Incentive Plan of 1998 due to achievement of specified EPS hurdles for restricted shares awarded during2001-2005. The restricted shares were released on March 1, 2007.
(3)The value of the vested restricted shares is based on the closing price of $52.33 per share of our Common Stock on the NYSE on March 1, 2007.
Pension Benefits
The table below provides the actuarial present value of the Executive’s accumulated benefits under the Company’s retirement plans and the number of years of service credited to each Executive under these plans.
Pension Benefits Table
                   
       
         
      Number of
   Present Value of
    Payments During 
 
      Years Credited
   Accumulated
   Last Fiscal
 
      Service
   Benefit(1)(2)
   Year(3)
 
Name
  Plan Name
  (#)
   ($)
   ($)
 
(a)  (b)  (c)   (d)   (e) 
Rainwater  1) Retirement Plan   27    701,437     
   2) Supplemental Retirement Plan   27    955,031     
Baxter  1) Retirement Plan   11    87,582     
   2) Supplemental Retirement Plan   11    181,616     
Voss  1) Retirement Plan   37    802,767     
   2) Supplemental Retirement Plan   37    257,183     
Sullivan  1) Retirement Plan   17    215,801     
   2) Supplemental Retirement Plan   17    158,512     
Naslund  1) Retirement Plan   32    573,401     
   2) Supplemental Retirement Plan   32    127,005     
                   
(1)Represents the actuarial present value of the accumulated benefits relating to the Executives under the Retirement Plan and the SRP as of December 31, 2006. See Note 10 to our audited consolidated financial statements for the year ended December 31, 2006 included in our 2006 Form10-K for an


39


explanation of the valuation method and all material assumptions applied in quantifying the present value of the accumulated benefit. The calculations were based on retirement at the plan normal retirement age of 65, included no pre-retirement decrements in determining the present value, used an 80% lump sum/20% annuity payment form assumption, and used the plan valuation mortality assumptions after age 65 in the 1994 Group Annuity Reserving Table. Cash balance accounts were projected to age 65 using the 2006 plan interest crediting rate of 5.00%.
(2)The following table provides the Cash Balance Account (Lump Sum) Value for accumulated benefits relating to the Executives under the Retirement Plan and the SRP at December 31, 2006 as an alternative to the presentation of the actuarial present value of the accumulated benefits relating to the Executives under the Retirement Plan and the SRP as of December 31, 2006.
Cash Balance
Lump Sum Value
NamePlan Name($)
Rainwater1) Retirement Plan741,728
2) Supplemental Retirement Plan1,009,887
Baxter1) Retirement Plan104,082
2) Supplemental Retirement Plan215,832
Voss1) Retirement Plan854,799
2) Supplemental Retirement Plan273,852
Sullivan1) Retirement Plan251,507
2) Supplemental Retirement Plan184,739
Naslund1) Retirement Plan634,199
2) Supplemental Retirement Plan140,472
(3)All Executives are active and were not eligible for payments prior to December 31, 2006.
Ameren Retirement Plan

Most salaried employees of Ameren and its subsidiaries, including the Executives, earn benefits in the Cash Balancecash balance account under the Ameren Retirement Plan (the “Retirement Plan”) immediately upon employment. Benefits generally become vested after five years of service.
On an annual basis a bookkeeping account in a participant’s name is credited with an amount equal to a percentage of the participant’s pensionable earnings for the year. Pensionable earnings include base pay, overtimesalary and annual bonuses,EIP compensation, which are equivalent to amounts shown as “Annual Compensation”in columns (c), (d) and (g) in the Summary Compensation Table.
The applicable percentage is based on the participant’s age as of December 31 of that year. If the participant was an employee prior to July 1, 1998, an additional transition credit percentage is credited to the participant’s account through 2007 (or an earlier date if the participant had less than 10 years of service on December 31, 1998).


40


Participant’s Age
on December 31


  Regular Credit for
Pensionable Earnings*


 Transition Credit
Pensionable Earnings


 Total Credits

Less than 30

  3% 1% 4%

30 to 34

  4% 1% 5%

35 to 39

  4% 2% 6%

40 to 44

  5% 3% 8%

45 to 49

  6% 4.5% 10.5%

50 to 54

  7% 4% 11%

55 and over

  8% 3% 11%

                
      Transition
   
      Credit for
   
Participant’s Age
  Regular Credit for
  Pensionable
   
on December 31  Pensionable Earnings*  Earnings  Total Credits
Less than 30   3%    1%    4% 
30 to 34   4%    1%    5% 
35 to 39   4%    2%    6% 
40 to 44   5%    3%    8% 
45 to 49   6%    4.5%    10.5% 
50 to 54   7%    4%    11% 
55 and over   8%    3%    11% 
                
*    
* An additional regular credit of 3% is received for pensionable earnings above the Social Security wage base.

These accounts also receive interest credits based on the average yield for one-year U.S. Treasury Bills for the previous October, plus one percent.1%. The minimum interest credit is five percent. 5%.
In addition, certain annuity benefits earned by participants under prior plans as of December 31, 1997 were converted to additional credit balances under the Ameren Retirement Plan as of January 1, 1998.
Effective January 1, 2001, an Enhancement Accountenhancement account was added that provides a $500 additional credit at the end of each year.
The normal retirement age under the Retirement Plan and the SRP is 65. Neither the Retirement Plan nor the SRP contain provisions for crediting extra years of service or for early retirement. When a participant terminates employment (including as a result of retirement), the amount credited to the participant’s account is converted to an annuity or paid to the participant in a lump sum. The participant can also choose to defer distribution, in which case the account balance is credited with interest at the applicable rate until the future date of distribution.

Ameren Supplemental Retirement Plan
In certain cases, pension benefits under the Retirement Plan are reduced to comply with maximum limitations imposed by the Internal Revenue Code. A Supplemental Retirement PlanIRC. The SRP is maintained by Ameren to provide for a supplemental benefit equal to the difference between the benefit that would have been paid if such CodeIRC limitations were not in effect and the reduced benefit payable as a result of such CodeIRC limitations. The SupplementalAny Executive whose pension benefits under the Retirement Plan would exceed IRC limitations or who participates in the deferred compensation plans described below is eligible to participate in the SRP. The SRP is unfunded and is not a qualified plan under the Internal Revenue Code.

The following table shows the estimated annual retirement benefits, including supplemental benefits described in the preceding paragraph, which would be payable to each Named Executive Officer listed as a single life annuity if he were to retire at age 65. These estimates were derived on the basis of the following assumptions: base salary will increase by 6 percent per year and each Named Executive Officer will receive an annual bonus equal to his average bonus over the last five years. IRC.

There is no offset under either the Retirement Plan or the Supplemental Retirement PlanSRP for Social Security benefits or other offset amounts.


41

            Name            


  Year of 65th Birthday

     Estimated Annual Benefit

G. L. Rainwater

  2011     $236,000

W. L. Baxter

  2026      342,000

T. R. Voss

  2012      161,000

S. R. Sullivan

  2025      261,000

C. D. Naslund

  2017      175,000


Equity
Nonqualified Deferred Compensation Plan

The following table summarizes information,discloses contributions, earnings and balances under nonqualified deferred compensation plans for each Executive.
Nonqualified Deferred Compensation Table
                          
   Executive
  Company
     Aggregate
   
   Contributions
  Contributions
  Aggregate Earning
  Withdrawals/
  Aggregate Balance 
   in 2006(1)
  in 2006
  in 2006(2)
  Distributions
  at12/31/06(3) 
Name
  ($)
  ($)
  ($)
  ($)
  ($) 
  (a)  (b)  (c)  (d)  (e)  (f) 
Rainwater   763,000        197,096        2,937,417 
Baxter   50,016        31,277        456,614 
Voss   132,000        67,467        998,164 
Sullivan   114,000        51,731        772,362 
Naslund   159,006        48,516        712,023 
                          
(1)A portion of these amounts are also included in amounts reported as “Salary” in column (c) of the Summary Compensation Table. These amounts also include a portion of amounts reported as “Bonus” in our 2006 proxy statement, representing bonuses paid in 2006 for performance during 2005.
(2)The dollar amount of aggregate interest earnings accrued during 2006. The above-market interest component of these amounts is included in amounts reported in column (h) of the Summary Compensation Table. See footnote (6) to the Summary Compensation Table for the amounts of above-market interest.
(3)The dollar amount of the total balance of the Executive’s account as of December 31, 2006 consists of the following elements.
                     
   Executive
  Interest
  Total Per Table
  Amount Previously Reported as  
   Contributions
  Earnings
  Above
  Compensation in Prior Years(1)  
Name  ($)  ($)  ($)  ($)
Rainwater   2,330,313    607,104    2,937,417    2,048,109 
Baxter   300,602    156,012    456,614    132,886 
Voss   672,237    325,927    998,164    294,125 
Sullivan   582,472    189,890    772,362    192,000 
Naslund   468,904    243,119    712,023    138,750 
                     
(1)Represents amounts previously reported as compensation to the Executive in Ameren’s Summary Compensation Table in previous years.
We made changes to our nonqualified deferred compensation plans in response to changes in tax rules applicable to these type of plans.
Deferred Compensation Plans Prior to January 1, 2007
Under the Ameren Deferred Compensation Plan and the Executive Incentive Compensation Program Elective Deferral Provisions, executive officers and certain key employees, including the Executives, were, prior to January 1, 2007, permitted to annually choose to defer up to 30% of their salary and either 25%, 50%, 75% or 100% of their EIP compensation.
Deferred amounts under both plans earn interest at 150% of the average Mergent’s Index rate while the participant is employed by us. After the participant retires, attains 65 years of age or dies, the deferred


42


amounts under the plans earn the average Mergent’s Index rate. The plans compound interest annually and the rate is determined as of December 31, 2005, relatingthe first day of the plan year.
A participant was permitted to choose to receive the deferred amounts at retirement in a lump sum payment or in installments over a set period, up to 15 years with respect to deferred salary and up to 10 years with respect to deferred EIP compensation.
In the event a participant terminates employment with Ameren prior to attaining retirement age and after the occurrence of a change of control (as defined in such plans), the balance in such participant’s deferral account, including interest payable at 150% of the average Mergent’s Index rate, is distributable in a lump sum to the participant within 30 days of the date the participant terminates employment.
Deferred Compensation Plan Beginning January 1, 2007
In November 2006, the Company adopted the Ameren Deferred Compensation Plan (the “New Deferred Compensation Plan”) which merges the portions of the two plans described above which relate to post-2004 deferrals and amends and restates the foregoing. The New Deferred Compensation Plan became effective as of January 1, 2007 and applies to compensation paid to participants on and after such date. The New Deferred Compensation Plan was filed with the SEC as Exhibit 10.1 to the Company’s equity compensation plan pursuantCurrent Report onForm 8-K dated December 5, 2006.
Under the New Deferred Compensation Plan, executive officers and certain key employees, including the Executives, may annually choose to which grantsdefer up to 50% (in 1% increments) of optionstheir salary and restricted stock have been granted from timeup to time.

EQUITY COMPENSATION PLAN INFORMATION

                          Plan

                      Category                       


  

Number of Securities to be
Issued Upon Exercise of
Outstanding Options,
Warrants and Rights

(a)


  

Weighted-Average

Exercise Price of

Outstanding Options,
Warrants and Rights

(b)


  

Number of Securities Remaining
Available for Future Issuance Under
Equity Compensation Plans
(excluding securities reflected in
column (a))

(c)


Equity compensation plans approved by security holders(1)

  135,992  $33.76  900,089

Equity compensation plans not approved by security holders

  -   -  -
   
  

  

Total

  135,992  $33.76  900,089
   
  

  

(1)Consists of the Ameren Corporation Long-Term Incentive Plan of 1998 which was approved by shareholders in April 1998, and expires on April 1, 2008. Subject to shareholder approval, as recommended under Item (2) of this proxy statement, the Company proposes to replace this plan on a prospective basis with the Ameren Corporation 2006 Omnibus Incentive Compensation Plan.

100% (in 1% increments or amounts in excess of a threshold) for cash incentive awards. There are no minimum dollar thresholds for deferrals. At the request of a participant, the Company may, in its discretion, waive the 50% limitation.

Deferred amounts under the New Deferred Compensation Plan earn interest at 150% of the Mergent’s Index rate while the participant is employed by the Company or one of its subsidiaries. After the participant terminates employment for any reason, the deferred amounts under the New Deferred Compensation Plan earn the average Mergent’s Index rate.
A participant may choose to receive the deferred amounts at retirement in a lump sum payment or in installments over a set period of up to 15 years. In the event a participant terminates employment with the Company and its subsidiaries prior to age 55, the balance in such participant’s deferral account is distributable in a lump sum to the participant within 30 days of the date the participant terminates employment. In the event a participant terminates employment with the Company and its subsidiaries prior to age 55 and after the occurrence of a Change of Control (as defined below under “— ARRANGEMENTS WITH NAMED EXECUTIVE OFFICERSOther Potential Post-Employment Payments

 —Change of Control Protection —Change of Control Severance Plan”) the balance in such participant’s deferral account, including interest payable at 150% of the average Mergent’s Index rate, is distributable in a lump sum to the participant within 30 days of the date the participant terminates employment.

Other Potential Post-Employment Payments
Employment Agreements
The Company has no employment agreements with the Executives.
General Severance Plan
Ameren maintains a Severance Plan for Management Employees which provides for severance based on years of service and weeks of pay for all salaried full-time employees on the active payroll. The Executives are covered under this plan in the event of a qualified termination (defined under the plan) and are eligible for severance on the same basis as other full-time salaried employees.


43


Change of Control Protection
In General
Change of Control Severance Plan.In February 2006, Ameren’s Board of Directors approved an Amended and Restated Change of Control Severance Plan (the “Change of Control Plan”), the entire text of which was filed as Exhibit 10.5 to the Company’s Current Report onForm 8-K dated February 16, 2006. Other Company plans also carry change of control provisions.
Change of Control severance and PSUP provisions were designed or redesigned by the Committee in 2006 and the Committee believes these provisions are more conservative than is typical.
Under the Change of Control Plan, designated officers of Ameren and its subsidiaries, including the Named Executive Officers,Executives, are entitled to receive severance benefits if their employment is terminated without Cause (as defined in the Change of Control Plan)below) or by the executiveExecutive for Good Reason (as defined in the Change of Control Plan) within two years after a “changeChange of control”. Control.
Definitions of Change of Control, Cause and Good Reason
A change of control (“Change of Control”) occurs under the Change of Control Plan, in general, if upon:
(i) any individual, entity or group acquires 20 percentthe acquisition of 20% or more of the outstanding Common Stock of Ameren or of the combined voting power of the outstanding voting securities of Ameren;
(ii) individuals who, asa majority change in composition of the effective dateboard of directors;
(iii) a reorganization, merger or consolidation, sale or other disposition of all or substantially all of the Change of Control Plan, constitute the Board of Directorsassets of Ameren, unless current shareholders continue to own 60% or who have been approved by a majoritymore of the Board who were in office prior tosurviving entity immediately following the change, cease for any reason to constitute a majority of the Board; (iii) Ameren enters into certain business combinations, unless certain requirements are met regarding continuing ownership of the outstanding Common Stock and voting securities of Ameren and the membership of its Board of Directors;transaction; or
(iv) approval by Ameren shareholders of a complete liquidation or dissolution of Ameren.
“Cause” is defined as follows:
(i) the Company.participant’s willful failure to substantially perform his or her duties with Ameren (other than any such failure resulting from the participant’s disability), after notice and opportunity to remedy;
(ii) gross negligence in the performance of the participant’s duties which results in material financial harm to Ameren;
(iii) the participant’s conviction of, or plea of guilty or nolo contendere, to any felony or any other crime involving the personal enrichment of the participant at the expense of Ameren or shareholders of Ameren; or
(iv) the participant’s willful engagement in conduct that is demonstrably and materially injurious to Ameren, monetarily or otherwise.
“Good Reason” is defined as follows:
(i) a reduction of the participant’s authorities, duties, or responsibilities as an executiveand/or officer of Ameren;
(ii) required relocation of more than 50 miles;
(iii) any material reduction of the participant’s base salary or target bonus opportunity;
(iv) reduction in grant-date value of long-term incentive opportunity;
(v) failure to provide the same aggregate value of employee benefit or retirement plans in effect prior to a Change of Control;
(vi) failure of a successor to assume the Change of Control Plan agreements; or
(vii) a material breach of the Change of Control Plan.


44


Severance benefits are based upon a severance period of two

If an Executive’s employment is terminated without Cause or three years, depending onby the officer’s position. An officer entitled to severanceExecutive for Good Reason, the Executive will receive a cash lump sum equal to the following: (a)
(i) salary and unpaid vacation pay through the date of termination; (b) a
(ii) pro rata bonus EIP compensation for the year of termination, andtermination;
(iii) three years worth of each of base salary, target EIP compensation, additional pension credit and bonus for the severance period; (c) continued employee welfare benefits for the severance period; (d) a cash payment equal to the actuarial value of the additional benefits the officer would have received under Ameren’s qualified and supplemental retirement plans if employed for the severance period; (e)benefits;
(iv) up to $30,000 for the cost of outplacement services;services (not available for a Good Reason termination); and (f)
(v) reimbursement andgross-up for any excise tax imposed on such benefits asassuming excess payments are at least 110% above the imposed cap under the Internal Revenue Code.

In addition toIRC.

Following are details of how the foregoing severance benefits, the Long-Term Incentiveabove items are calculated.
• Retirement Plan Benefit Assumptions.  Amount equal to the difference between (a) the account balance under the Retirement Plan and SRP which the participant would receive if his or her employment continued during the three-year period upon which severance is received (assuming the participant’s compensation during such period would have been equal to his or her compensation as in effect immediately prior to termination), and (b) the actual account balance (paid or payable) under such plans as of the date of termination.
• Welfare Benefit Payment Assumptions.  Continued coverage for the Executive’s family with medical, dental, life insurance and executive life insurance benefits as if employment had not been terminated during the three-year period upon which severance is received. Calculation assumes full cost of benefits over the three-year period. In addition, the Executive’s family receives additional retiree medical benefits (if applicable) as if employment had not been terminated during the three-year period upon which severance is received. All retiree medical benefits are payable only in their normal form as monthly premium payments. The actuarial present value of the additional retiree medical benefits is included, calculated based on retirement at the end of the three-year severance period, a discount rate of 5.89% (120% of the long-term annual Federal rate at December 2006), and the plan valuation mortality assumptions (only after age 65) in the 1994 Group Annuity Reserving Table.
Amounts paid upon a Change of 1998, certain Ameren deferred compensation plansControl and awards granted pursuant to the 2006 Omnibus Incentive Compensation Plan include provisions providing certain protections to the Company’s officers upon the occurrencetermination of a change of control, as definedemployment are quantified in the related plantable below assuming termination occurred at December 31, 2006. Excise tax andgross-up payments are estimated using a stock price of $53.73 per share (the closing price of Ameren’s Common Stock on the NYSE on December 29, 2006, the last business day of 2006).
                          
   Three Years’ Base
  Three Years’
         
   Salary and Target
  Additional
  Three Years’
      
   EIP, Plus Pro Rata
  Pension
  Welfare
  Outplacement
  Excise Tax and
   EIP
  Credit
  Benefits(1)
  at Maximum
  Gross-up (to IRS)
Name  ($)  ($)  ($)  ($)  ($)
Rainwater   5,940,000    985,163    55,923    30,000    4,818,315 
Baxter   2,700,000    300,971    49,080    30,000    1,953,342 
Voss   2,376,000    469,893    49,080    30,000    1,700,296 
Sullivan   2,052,000    289,600    49,080    30,000    1,547,379 
Naslund   1,675,000    324,642    90,444    30,000    1,184,616 
                          
(1)Reflects the estimated lump-sum present value of all future premiums which will be paid on behalf of or to the Executives under our welfare benefit plans. These amounts are not paid as a cash lump sum upon a Change of Control and termination of employment.


45


Ability to Amend or in the award issued pursuant to such plan. The protections include immediate vestingTerminate Change of certain awards and benefits and elimination of restrictions of restricted stock awards.

Control Plan

The Board may amend or terminate the Change of Control Plan at any time, including designating any other event as a “changeChange of control,”Control, provided that the Change of Control Plan may not be amended or terminated (i) following a “changeChange of control,”Control, (ii) at the request of a third party who has taken steps reasonably calculated to effect a “changeChange of control”Control or (iii) otherwise in connection with or in anticipation of a “changeChange of control”Control in any manner that could adversely affect the rights of any officer covered by the Change of Control Plan.

DeferredChange of Control Provision in Other Company Compensation Plans

The following is a summary of the treatment of awards granted under the Long-Term Incentive Plan of 1998 and the 2006 Omnibus Incentive Compensation Plan upon a change of control, as defined in the related plan.
Long-Term Incentive Plan of 1998.Under the Ameren DeferredCompany’s Long-Term Incentive Plan of 1998, restrictions on restricted stock awarded under this Plan are eliminated immediately upon a change of control, as defined in such Plan. Given that, the following shares, which are included in column (i) of the Outstanding Equity Awards at Fiscal Year-End Table, would vest upon a change of control.
Number of Restricted Shares That Would
NameVest Upon a Change of Control
Rainwater24,341
Baxter12,678
Voss9,952
Sullivan7,338
Naslund5,488
2006 Omnibus Incentive Compensation Plan.  Following are the details of protections provided with respect to the 2006 PSU awards under the 2006 Omnibus Incentive Compensation Plan upon a Change of Control. Definitions of capitalized terms may be found in the Change of Control Plan. In brief, the goal of these protections is to avoid acceleration of vesting and its Executive Incentive Compensation Program Elective Deferral Provisions, executive officers and certain key employees, includingpayment in situations where a Change of Control occurs but the Named Executive Officers, may annually chooseCompany continues to defer up to 30 percent of their salary and either 25, 50, 75 or 100 percent of their bonus. All of the Named Executive Officers have deferred amounts under one or both of the plans. The minimum amount of salary that can be deferred in any calendar year is $3,500exist and the minimum amount of bonus that can be annually deferred is $2,000. Deferred amounts under both plans earn interest at 150 percent of the average Mergent’s Index rate untilExecutive retains his or her position.
• Change of Control prior to vesting after which there is no traded stock.  Upon a Change of Control which occurs on or before December 31, 2008 in which the Company ceases to exist or is no longer publicly trading on the NYSE or the NASDAQ Stock Market, the target number of PSU awards granted, together with dividends accrued thereon, will be converted to nonqualified deferred compensation. Interest on the nonqualified deferred compensation will accrue based on the prime rate, computed as provided in the award agreement.
(i) Continued employment.  If the participant retiresremains employed with the Company or attains 65 years of age. Afterits successor until December 31, 2008, the nonqualified deferred compensation plus interest will be paid to the participant retires, attains 65 years of age or dies, the deferred amounts under the plans earn the average Mergent’s Index rate. For 2005, the average Mergent’s Index rate was 5.63 percent, 150 percent of which was 8.46 percent. In 2005, the Named Executive Officers earned the following interest on their deferred amounts: G. L. Rainwater, $140,429; W. L. Baxter, $27,235; T. R. Voss, $57,104; S. R. Sullivan, $42,780; and C. D. Naslund, $36,918. A participant may choose to receive the deferred amounts at retirement inas a lump sum paymenton such date.
(ii) Death or in installments overdisability.  If the participant remains employed with the Company or its successor until his or her death or disability which occurs before December 31, 2008, the participant or his or her designee will immediately receive the nonqualified deferred compensation, plus interest, upon such death or disability.
(iii) Qualifying termination.  If the participant is involuntarily terminated or has a set period, up to 15 years with respect tovoluntary termination for Good Reason before December 31, 2008 (collectively, a “qualifying termination”), the participant will immediately receive the nonqualified deferred salary and up to 10 years with respect to deferred bonus. Incompensation, plus interest upon such termination.
(iv) Other terminations.  If the event a participant terminates employment withbefore December 31, 2008 other than as described above, the nonqualified deferred compensation, plus interest is forfeited.


46


The following table sets forth the number of shares that would be paid at December 31, 2006 to each Executive upon the earliest to occur of the events described in (i) through (iii) above following a Change of Control after which Ameren has no traded stock. A portion of these shares are included in column (i) of the Outstanding Equity Awards at Fiscal Year-End Table.
Number of Shares Relating to PSU Awards to be
Paid Out After a Change of Control and on
NameEarliest of Events Described Above
Rainwater58,717
Baxter18,640
Voss16,403
Sullivan14,167
Naslund7,979
• Change of Control after vesting, and after which there is no traded stock.  Upon a Change of Control that occurs after December 31, 2008, the participant will receive an immediate distribution of cash equal to the value of the earned PSUs, computed as provided in the award agreement.
• Change of Control but the Company continues in existence.  If there is a Change of Control but the Company continues in existence and remains a publicly traded company on the NYSE or the NASDAQ Stock Market, the PSUs will pay out upon the earliest to occur of the following:
(i) two years and one day after the vesting date;
(ii) the participant’s death;
(iii) if the participant becomes disabled or retires during the performance period, one day after the vesting date;
(iv) if the participant becomes disabled or retires after the vesting date, upon the participant’s disability or retirement, respectively;
(v) if the participant experiences a qualifying termination during the two-year period following the Change of Control and the termination occurs prior to attaining retirement agethe vesting date, all of the PSUs the participant would have earned if such participant remained employed until the vesting date will vest on such date and such vested PSUs will be paid in shares of the Company’s Common Stock as soon as practicable thereafter; and
(vi) if the participant experiences a qualifying termination during the two-year period following the Change of Control but the termination occurs after the occurrence of a change in control (as defined in such plans), the balance in such participant’s deferral account, including interest payable at 150 percent of the average Mergent’s Index rate, is distributable in a lump sum to the participant within 30 days of thevesting date, the participant terminates employment.will receive an immediate distribution of the earned shares of the Company’s Common Stock.
Treatment of Restricted Stock Upon Terminations Other Than for Change of Control
Restricted stock may vest upon retirement, death, disability, and involuntary termination not for Cause. The number of shares that vest depends on the Executive’s age at the time of the termination as indicated below.
• Age 61 and under:  A prorated award is earned through the termination date at the March 1 following the end of the performance period (based on actual performance) and paid immediately following such March 1. All other unvested restricted shares are forfeited.
• Age 62 or higher:  Restricted shares continue to vest in accordance with the terms of the awards.


47


Treatment of PSUs Upon Termination Other Than for Change of Control
The following summarizes the impact of employment events that may result in payment of PSU awards.
Employment EventPayout (Always in Ameren Common Stock)
DeathAll awards pay out at target (plus accrual of dividends), pro rata for the number of days worked in each performance period.
DisabilityAll outstanding awards are earned at the same time and to the same extent that they are earned by other participants, and are paid out by March 15 after the performance period ends.
RetirementIf retirement occurs during the performance period at:
Age 55-62 with 5 years of service: A prorated award is earned at the end of the3-year performance period (based on actual performance) and paid immediately.
Age 62+ with 5 years of service: A full award is earned at the end of the3-year performance period and paid immediately.
If retirement occurs during the2-year holding period following the performance period, payout of earned and vested awards is made immediately.
Based on the above, the following numbers of PSUs would vest upon the Executive’s termination at December 31, 2006.
           
   Number of PSUs That Would Vest Upon
   Number of PSUs That Would Vest Upon
 
Name  Death of Executive   Retirement of Executive(1) 
Rainwater   19,572     12,231 
Baxter    6,213     
Voss    5,468     3,417 
Sullivan    4,722     
Naslund    2,660     
           
(1)Messrs. Baxter, Sullivan and Naslund are not retirement eligible. Therefore, no PSUs would vest under this scenario.


48


Notwithstanding anything to the contrary set forth in any of the Company’s filings under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, that might incorporate other filings with the SEC, including this proxy statement, in whole or in part, the following Audit Committee Report shall not be deemed to be incorporated by reference into any such filings.

AUDIT COMMITTEE REPORT

The Audit Committee reviews Ameren Corporation’sAmeren’s financial reporting process on behalf of the Board of Directors. In fulfilling its responsibilities, the Committee has reviewed and discussed the audited financial statements to be included in the 2005 Annual Report on SEC 2006Form 10-K with Ameren’s management and the independent auditors.registered public accountants. Management is responsible for the financial statements and the reporting process, as well as maintaining effective internal control over financial reporting and assessing such effectiveness. The independent auditorsregistered public accountants are responsible for expressing an opinion on the conformity of those audited financial statements with accounting principles generally accepted in the United States, as well as expressing an opinion on whether Ameren maintained effective internal control over financial reporting and management’s assessment of such effectiveness.

The Audit Committee has discussed with the independent auditors,registered public accountants, the matters required to be discussed by the rules of the Public Company Accounting Oversight Board (“PCAOB”), including Statement ofU.S. Auditing Standards No. 61.Standard Section 380. In addition, the Audit Committee has discussed with the independent auditors,registered public accountants, the auditors’accountants’ independence with respect to Ameren and its management, including the matters in the written disclosures and the letter required by Independence Standards Board Standard No. 1, Independence Discussions with Audit Committees, received from the independent auditors.registered public accountants. To ensure the independence of the auditors,registered public accountants, Ameren has instituted monitoring processes at both the internal management level and the Audit Committee level. At the management level, a vice president and the corporate controller are required to review and pre-approve all engagements of the independent auditorsregistered public accountants for any category of services, subject to the pre-approval of the Audit Committee described below. In addition, the corporate controller is required to provide to the Audit Committee at each of its meetings (except meetings held exclusively to review earnings press releases and quarterly reports on SECForm 10-Q) a written description of all services to be performed by the independent auditorsregistered public accountants and the corresponding estimated fees. The monitoring process at the Audit Committee level includes a requirement that the Committee pre-approve the use of the independent auditorsregistered public accountants to perform any category of services. At each Audit Committee meeting (except meetings held exclusively to review earnings press releases and quarterly reports on SECForm 10-Q), the Committee receives separate reportsa joint report from the independent auditorsregistered public accountants and the corporate controller concerning audit fees and fees paid to the independent auditorsregistered public accountants for all other services rendered, with a description of the services performed. The Audit Committee has considered whether the independent auditors’registered public accountants’ provision of the services covered under the captions “Independent Auditors – “INDEPENDENT REGISTERED PUBLIC ACCOUNTANTS —Fees for Fiscal Years 2006 and 2005 —Audit-Related Fees”Fees, “– “— Tax Fees”Fees and “– “— All Other Fees”Fees in this proxy statement is compatible with maintaining the auditors’accountants’ independence and has concluded that the auditors’accountants’ independence has not been impaired by their engagement to perform these services.

In reliance on the reviews and discussions referred to above, the Audit Committee recommended to the Board of Directors that the audited financial statements be included in Ameren’s Annual Report on SEC 2006Form 10-K, for the year ended December 31, 2005, for filing with the Securities and Exchange Commission.

SEC.

Audit Committee:

Douglas R. Oberhelman, Chairman


Stephen F. Brauer
Susan S. Elliott


Richard A. Liddy


Richard A. Lumpkin


49


INDEPENDENT AUDITORSREGISTERED PUBLIC ACCOUNTANTS

PwC served as the independent auditorsregistered public accountants for Ameren and its subsidiaries in 2005.2006. PwC is an independent registered public accounting firm with the PCAOB. Representatives of the firm are expected to be present at the Annual Meeting with the opportunity to make a statement if they so desire and are expected to be available to respond to appropriate questions.

Fees Forfor Fiscal Years 20052006 and 20042005

Audit Fees:

Fees

The aggregate fees for professional services rendered by PwC for (i) the audits of the consolidated annual financial statements of Ameren included in Ameren’s 2005 Summary Annual Report to Shareholdersthe combined 2006Form 10-K of Ameren and in Ameren’s 2005 combined Form 10-K andits registered subsidiaries, the annual financial statements of its subsidiaries included in Ameren’s 2005the combined 2006Form 10-K;10-K of Ameren and its registered subsidiaries and the annual financial statements of certain non-registered subsidiaries; (ii) the audit of Ameren’s internal control over financial reporting and management’s assessment of the effectiveness of such controls; (iii) the reviews of the quarterly financial statements included in the combinedForms 10-Q of Ameren and its subsidiaries for the 20052006 fiscal year; and (iv) for services provided in connection with debt and equity offerings,offerings; (v) certain accounting and reporting consultations; and (vi) Illinois required audits for the 2006 fiscal year, were $1,880,195.

$2,130,700.

Fees billed by PwC for audit services rendered to Ameren and its subsidiaries during the 20042005 fiscal year totaled $1,854,200.

$1,880,195.

Audit-Related Fees:

Fees

The aggregate fees for audit-related services rendered by PwC to Ameren and its subsidiaries during the 20052006 fiscal year totaled $900,097.$1,317,642. Such services consisted of: (i) due diligence services — $790,776; (ii) risk and controls assessments – $283,730; (ii) due diligence services – $266,967;assessment — $348,866; (iii) employee benefit plan audits – $185,500; — $163,000;(iv) certain accounting and reporting consultations – $93,050; (v) Illinois required audits – $42,500; (vi) IP acquisition assistance – $13,950; (vii) agreed-upon procedures related to debt agreement compliance – $9,900;— $10,000; and (viii)(v) stock transfer/registrar review – $4,500.

— $5,000.

Fees billed by PwC for audit-related services rendered to Ameren and its subsidiaries during the 20042005 fiscal year totaled $510,350.

$900,097.

Tax Fees:

Fees

PwC rendered no tax services to Ameren and its subsidiaries during the 20052006 and 20042005 fiscal years.

All Other Fees:

Fees

The aggregate fees billed to Ameren by PwC during the 20052006 fiscal year for all other services rendered to Ameren and its subsidiaries totaled $28,000. Such services consisted of: (i) a utilities training course provided to accounting and financial reporting personnel – $14,000; (ii)$8,000 for accounting and reporting reference software and a benchmarking tool – $8,000; and (iii) income tax return preparation for an expatriate employee of Ameren – $6,000.

tool.

Fees billed by PwC for all other services rendered to Ameren and its subsidiaries during the 20042005 fiscal year totaled $94,685.

$28,000.

Policy Regarding the Approval of Independent AuditorsRegistered Public Accountants Provision of Audit
     and Non-Audit Services

The Audit Committee has adopted a policy to pre-approve all audit and permissible non-audit services provided by the independent auditorsregistered public accountants to Ameren and its subsidiaries. This policy and the procedure by which it is implemented is included in the “Audit Committee Report”“AUDIT COMMITTEE REPORT” above. The Audit Committee pre-approved under that policy 100 percent of the fees for services covered under the captions “Audit“— Audit Fees,“Audit-Related Fees”“— Audit-Related Fees and “All“— All Other Fees”Fees for fiscal years 20042006 and 2005.


50


SHAREHOLDER PROPOSALS

Any shareholder proposal intended for inclusion in the proxy material for the Company’s 20072008 annual meeting of shareholders must be received by the Secretary of the Company on or before November 15, 2006.14, 2007. We expect that the 20072008 annual meeting of shareholders will be held on April 24, 2007.

22, 2008.

In addition, under the Company’s By-Laws, shareholders who intend to submit a proposal in person at an annual meeting, or who intend to nominate a director at an annual meeting, must provide advance written notice along with other prescribed information. In general, such notice must be received by the Secretary of the Company at the principal executive offices of the Company not later than 60 or earlier than 90 days prior to the anniversary of the previous year’s annual meeting. The specific procedures to be used by shareholders to recommend nominees for director are set forth in the Company’s Director Nomination Policy, Regarding Nominations of Directors, a copy of which is attached hereto as Appendix A. A copy of the Company’s By-Laws may be obtained by written request to the Secretary of the Company.

PROXY SOLICITATION

In addition to the use of the mails, proxies may be solicited by personal interview, or by telephone or other means, and banks, brokers, nominees and other custodians and fiduciaries will be reimbursed for their reasonableout-of-pocket expenses in forwarding soliciting material to their principals, the beneficial owners of stock of the Company.our Common stock. Proxies may be solicited by our directors, officers and key employees of the Company on a voluntary basis without compensation. The CompanyWe will bear the cost of soliciting proxies on itsour behalf.

SUMMARY ANNUAL REPORT TO SHAREHOLDERS AND
FORM 10-K

Our 2006Ameren’s 2005 Summary Annual Report to Shareholders and 2005 Form 10-K, including consolidated financial statements for the year ended December 31, 2005,2006, accompanies this proxy statement. The Summary Annual Report and 2005 2006Form 10-K is also available on the Company’s website athttp://www.ameren.com.www.ameren.com. If requested, the Companywe will provide you copies of any exhibits to the 2005 2006Form 10-K upon the payment of a fee covering our reasonable expenses in furnishing the exhibits. You can request exhibits to the 2005 2006Form 10-K by writing to the Office of the Secretary, Ameren Corporation, P.O. Box 66149, St. Louis,Missouri 63166-6149.


FOR INFORMATION ABOUT THE COMPANY, INCLUDING THE COMPANY’S ANNUAL, QUARTERLY AND CURRENT REPORTS ON SECFORMS 10-K, 10-Q10-K,10-Q AND8-K, RESPECTIVELY, PLEASE VISIT THE INVESTORS’ SECTION OF AMEREN’S HOME PAGE ON THE INTERNET HTTP://WWW.AMEREN.COM.WWW.AMEREN.COM. INFORMATION CONTAINED ON THE COMPANY’S WEBSITE IS NOT INCORPORATED INTO THIS PROXY STATEMENT OR OTHER SECURITIES FILINGS.


51


Appendix A
APPENDIX A
Policy Regarding Nominations of Directors

POLICY REGARDING NOMINATIONSOF DIRECTORS

The Nominating and Corporate Governance Committee (the“Committee” “Committee”) has adopted the following policy (the“Director “Director Nomination Policy”) to assist it in fulfilling its duties and responsibilities as provided in its charter (the“Charter” “Charter”). This Director Nomination Policy may be amendedand/or restated from time to time by the Committee in accordance with the Charter and as provided herein.
1. Recommended Candidates.  The Committee shall consider any and all candidates recommended as nominees for directors to the Committee by any directors, officers, shareholders of the Company, third party search firms and other sources. Under the terms of the Company’s By-Laws, the Committee will consider director nominations from shareholders of record who provide timely written notice along with prescribed information to the Secretary of the Company. To be timely, the notice must be received by the Secretary at the principal executive offices of the Company not later than 60 or earlier than 90 days prior to the anniversary of the previous year’s annual meeting, except in the case of candidates recommended by shareholders of more than 5% of the Company’s Common Stock who may also submit nominations in accordance with the procedures in Section 2 under “5% Shareholder Recommendations” and except as otherwise provided in the Company’s By-Laws. The shareholder’s notice must set forth (1) all information relating to such director nominee that is required to be disclosed under the federal securities laws in solicitation of proxies for election of directors in an election contest, including the person’s written consent to being named in the proxy statement as a nominee and to serving as a director if elected; (2) the name and address of the shareholder and any beneficial owner giving the notice as they appear on the Company’s books together with the number of shares of the Company’s Common Stock which are owned beneficially and of record by the shareholder and any beneficial owner; and (3) a signed statement by the nominee agreeing that, if elected, such nominee will (a) represent all Company shareholders in accordance with applicable laws and the Company’s By-Laws and (b) comply with the Company’s Corporate Compliance Policy and this Director Nomination Policy.
2. 5% Shareholder Recommendations.  For purposes of facilitating disclosure required in the Proxy Statement, the Committee and the Corporate Secretary shall identify any candidates recommended by shareholders owning more than 5% of the Company’s Common Stock, and identify the shareholder making such recommendation, as provided in and to the extent required by the federal securities laws. In addition to the procedures for shareholders to recommend nominees described in Section 1 above, shareholders or a group of shareholders who have owned more than 5% of the Company’s Common Stock for at least one year as of the date the recommendation was made, may recommend nominees for director to the Committee provided that (1) written notice from the shareholder(s) must be received by the Secretary of the Company at the principal executive offices of the Company not later than 120 days prior to the anniversary of the date the Company’s proxy statement was released to shareholders in connection with the previous year’s annual meeting, except as otherwise provided in the Company’s By-Laws; (2) such notice must contain the name and address of the shareholder(s) and any beneficial owner(s) giving the notice as they appear on the Company’s books, together with evidence regarding the number of shares of the Company’s Common Stock together with the holding period and the written consent of the recommended candidate and the shareholder(s) to being identified in the Company’s proxy statement; (3) such notice must contain all information relating to such director nominee that is required to be disclosed under federal securities laws in solicitation of proxies for election of directors in an election contest; and (4) such notice must contain a signed statement by the nominee agreeing that, if elected, such nominee will (a) represent all Company shareholders in accordance with applicable laws and the Company’s By-Laws and (b) comply with the Company’s Corporate Compliance Policy and this Director Nomination Policy.
3. Desired Qualifications, Qualities and Skills.  The Committee shall endeavor to find individuals of high integrity who have a solid record of accomplishment in their chosen fields and who possess the qualifications, qualities and skills to effectively represent the best interests of all shareholders. Candidates will be selected for their ability to exercise good judgment, and to provide practical insights and diverse perspectives.


A-1

  1.RECOMMENDED CANDIDATES. The Committee shall consider any and all candidates recommended as nominees for directors to the Committee by any directors, officers, shareholders of the Company, third party search firms and other sources. Under the terms of the Company’s By-Laws, the Committee will consider director nominations from shareholders of record who provide timely written notice along with prescribed information to the Secretary of the Company. To be timely, the notice must be received by the Secretary at the principal executive offices of the Company not later than 60 or earlier than 90 days prior to the anniversary of the previous year’s annual meeting, except in the case of candidates recommended by shareholders of more than 5% of the Company’s Common Stock who may also submit nominations in accordance with the procedures in Section 2 under “5% SHAREHOLDER RECOMMENDATIONS” and except as otherwise provided in the Company’s By-Laws. The shareholder’s notice must set forth (1) all information relating to such director nominee that is required to be disclosed under the federal securities laws in solicitation of proxies for election of directors in an election contest, including the person’s written consent to being named in the proxy statement as a nominee and to serving as a director if elected; (2) the name and address of the shareholder and any beneficial owner giving the notice as they appear on the Company’s books together with the number of shares of the Company’s Common Stock which are owned beneficially and of record by the shareholder and any beneficial owner; and (3) a signed statement by the nominee agreeing that, if elected, such nominee will (a) represent all Company shareholders in accordance with applicable laws and the Company’s By-Laws and (b) comply with the Company’s Corporate Compliance Policy and this Director Nomination Policy.

2.

5% SHAREHOLDER RECOMMENDATIONS. For purposes of facilitating disclosure required in the Proxy Statement, the Committee and the Corporate Secretary shall identify any candidates recommended by shareholders owning more than 5% of the Company’s Common Stock, and identify the shareholder making such recommendation, as provided in and to the extent required by the federal securities laws. In addition to the procedures for shareholders to recommend nominees described in Section 1 above, shareholders or a group of shareholders who have owned more than 5% of the Company’s Common Stock for at least one year as of the date the recommendation was made, may recommend nominees for director to the Committee provided that (1) written notice from the shareholder(s) must be received by the Secretary of the Company at the principal executive offices of the Company not later than 120 days prior to the anniversary of the date the Company’s proxy statement was released to shareholders in connection with the previous year’s annual meeting, except as otherwise provided in the Company’s By-Laws; (2) such notice must contain the name and address of the shareholder(s) and any beneficial owner(s) giving the notice as they appear on the Company’s books, together with evidence regarding the number of shares of the Company’s Common Stock together with the holding period and the written consent of the recommended candidate and the shareholder(s) to being identified in the Company’s proxy statement; (3) such notice must contain all information relating to such director nominee that is required to be disclosed under federal securities laws in solicitation of proxies for election of directors in an election contest; and (4) such notice must contain a signed statement by the nominee agreeing that, if elected, such nominee will (a) represent all Company shareholders in


accordance with applicable laws and the Company’s By-Laws and (b) comply with the Company’s Corporate Compliance Policy and this Director Nomination Policy.

3.DESIRED QUALIFICATIONS, QUALITIESAND SKILLS. The Committee shall endeavor to find individuals of high integrity who have a solid record of accomplishment in their chosen fields and who possess the qualifications, qualities and skills to effectively represent the best interests of all shareholders. Candidates will be selected for their ability to exercise good judgment, and to provide practical insights and diverse perspectives.

The Committee considers the following qualifications at a minimum to be required of any Board members in recommending to the Board of Directors potential new Board members, or the continued service of existing members:

the highest professional and personal ethics;

• the highest professional and personal ethics;
• broad experience in business, government, education or technology;
• ability to provide insights and practical wisdom based on their experience and expertise;
• commitment to enhancing shareholder value;
• sufficient time to effectively carry out their duties; their service on other boards of public companies should be limited to a reasonable number;
• compliance with legal and regulatory requirements;
• ability to develop a good working relationship with other Board members and contribute to the Board’s working relationship with senior management of the Company; and
• independence; a majority of the Board shall consist of independent directors, as defined in this Director Nomination Policy.
broad experience in business, government, education or technology;

ability to provide insights and practical wisdom based on their experience and expertise;

commitment to enhancing shareholder value;

sufficient time to effectively carry out their duties; their service on other boards of public companies should be limited to a reasonable number;

compliance with legal and regulatory requirements;

ability to develop a good working relationship with other Board members and contribute to the Board’s working relationship with senior management of the Company; and

independence; a majority of the Board shall consist of independent directors, as defined in this Director Nomination Policy.

Other than the foregoing, there are no stated minimum criteria for director nominees, although the Committee may also consider such other factors as it may deem are in the best interests of the Company and its shareholders. The Committee does, however, believe it appropriate for at least one member of the Board to meet the criteria for an “audit committee financial expert” as defined by Securities and Exchange Commission rules.

4.INDEPENDENCE. The Committee believes and it is the policy of the Company that a majority of the members of the Board meet the definition of “independent director” set forth in this Director Nomination Policy. The Committee shall annually assess each nominee for director by reviewing any potential conflicts of interest and outside affiliations, based on the criteria for independence set out below.

4. Independence.  The Committee believes and it is the policy of the Company that a majority of the members of the Board meet the definition of “independent director” set forth in this Director Nomination Policy. The Committee shall annually assess each nominee for director by reviewing any potential conflicts of interest and outside affiliations, based on the criteria for independence set out below.
An independent director is one who:
(1) has no material relationship with the Company, either directly or as a partner, shareholder or officer of an organization that has a relationship with the Company;
(2) is not an employee of the Company and no member of his or her immediate family is an executive officer of the Company;
(3) has not been employed by the Company and no member of his or her immediate family has been an executive officer of the Company during the past three years;
(4) has not received and no member of his or her immediate family has received more than $100,000 per year in direct compensation from the Company in any capacity other than as a director or as a pension for prior service during the past three years;
(5) (A) is not and no member of his or her immediate family is a current partner of a firm that is the Company’s internal or external auditor; (B) is not a current employee of the Company’s internal or external auditor; (C) does not have an immediate family member who is a current employee of the Company’s internal or external auditor and who participates in that firm’s audit, assurance or tax compliance (but not tax planning) practice; and (D) within the last three years was not and no member of his or her immediate family was (and no longer is), a partner or employee of the Company’s internal or external auditor and personally worked on the Company’s audit within that time;
(6) is not and no member of his or her immediate family is currently, and for the past three years has not been, and no member of his or her immediate family has been, part of an interlocking directorate in which an executive officer of the Company serves on the compensation committee of another company that employs the director or an immediate family member of the director;


A-2

(1)has no material relationship with the Company, either directly or as a partner, shareholder or officer of an organization that has a relationship with the Company;

(2)is not an employee of the Company and no member of his or her immediate family is an executive officer of the Company;

(3)has not been employed by the Company and no member of his or her immediate family has been an executive officer of the Company during the past three years;

(4)has not received and no member of his or her immediate family has received more than $100,000 per year in direct compensation from the Company in any capacity other than as a director or as a pension for prior service during the past three years;

(5)

(A) is not and no member of his or her immediate family is a current partner of a firm that is the Company’s internal or external auditor; (B) is not a current employee of the


Company’s internal or external auditor; (C) does not have an immediate family member who is a current employee of the Company’s internal or external auditor and who participates in that firm’s audit, assurance or tax compliance (but not tax planning) practice; and (D) within the last three years was not and no member of his or her immediate family was (and no longer is), a partner or employee of the Company’s internal or external auditor and personally worked on the Company’s audit within that time;

(6)is not and no member of his or her immediate family is currently, and for the past three years has not been, and no member of his or her immediate family has been, part of an interlocking directorate in which an executive officer of the Company serves on the compensation committee of another company that employs the director or an immediate family member of the director;

(7)is not an executive officer or an employee, and no member of his or her immediate family is an executive officer, of another company that makes payments to, or receives payments from, the Company for property or services in an amount which, in any single year, exceeds the greater of $1 million, or 2% of such other company’s consolidated revenues during any of the past three years;

(8)is free of any relationships with the Company that may impair, or appear to impair, his or her ability to make independent judgments; and

(9)is not and no member of his or her immediate family is employed by or serves as a director, officer or trustee of a charitable organization that receives contributions from the Company or a Company charitable trust, in an amount which exceeds the greater of $1 million or 2% of such charitable organization’s total annual receipts.

(7) is not an executive officer or an employee, and no member of his or her immediate family is an executive officer, of another company that makes payments to, or receives payments from, the Company for property or services in an amount which, in any single year, exceeds the greater of $1 million, or 2% of such other company’s consolidated revenues during any of the past three years;
(8) is free of any relationships with the Company that may impair, or appear to impair, his or her ability to make independent judgments; and
(9) is not and no member of his or her immediate family is employed as an executive officer of a charitable organization that receives contributions from the Company or a Company charitable trust, in an amount which exceeds the greater of $1 million or 2% of such charitable organization’s total annual receipts.
This policy may be modified temporarily if, due to unforeseen circumstances, strict adherence would be detrimental to the Board’s performance.

For purposes of determining a “material relationship,” the Committee shall utilize the following standards:

1.Any payments by the Company to a director’s primary business affiliation or the primary business affiliation of an immediate family member of a director for goods or services, or other contractual arrangements, must be made in the ordinary course of business and on substantially the same terms as those prevailing at the time for comparable transactions with non-affiliated persons.

2.The aggregate amount of such payments must not exceed 2% of the Company’s consolidated gross revenues;provided, however, there may be excluded from this 2% standard payments arising from (a) competitive bids which determined the rates or charges for the services and (b) transactions involving services at rates or charges fixed by law or governmental authority.

1. Any payments by the Company to a director’s primary business affiliation or the primary business affiliation of an immediate family member of a director for goods or services, or other contractual arrangements, must be made in the ordinary course of business and on substantially the same terms as those prevailing at the time for comparable transactions with non-affiliated persons.
2. The aggregate amount of such payments must not exceed 2% of the Company’s consolidated gross revenues; provided, however, there may be excluded from this 2% standard payments arising from (a) competitive bids which determined the rates or charges for the services and (b) transactions involving services at rates or charges fixed by law or governmental authority.
For purposes of these independence standards, (i) immediate family members of a director include the director’s spouse, parents, stepparents, children, stepchildren, siblings, mother- andfather-in-law, sons- anddaughters-in-law, and brothers- andsisters-in-law and anyone (other than domestic employees) who shares the director’s home and (ii) the term “primary business affiliation” means an entity of which the director is a principal/executive officer or in which the director holds at least a 5% equity interest.
5. Nominee Evaluation Process.  The Committee will consider as a candidate any director of the Company who has indicated to the Committee that he or she is willing to stand for re-election as well as any other person who is recommended by any shareholders of the Company in accordance with the procedures described under “Recommended Candidates” in Section 1 and under “5% Shareholder Recommendations” in Section 2. The Committee may also undertake its own search process for candidates and may retain the services of professional search firms or other third parties to assist in identifying and evaluating potential nominees and, if fees are paid to such persons in any year, such fees shall be disclosed in the next annual Proxy Statement relating to such year. The Committee may use any process it deems appropriate for the purpose of evaluating candidates which is consistent with the policies set forth in the Charter, Corporate Governance Guidelines and this Director Nomination Policy, which process may include, without limitation, personal interviews, background checks, written submissions by the candidates and third party references. Although the Committee may seek candidates that have different qualities and experiences at different times in order to maximize the aggregate experience, qualities and strengths of the Board members, nominees for each election or appointment of directors shall be evaluated using a substantially similar process and under no circumstances shall the Committee evaluate nominees recommended by a shareholder of the Company pursuant to a process substantially different than that used for other nominees for the same election or appointment of directors.
6. Categorize Recommendations.  For purposes of facilitating disclosure required in the Proxy Statement, the Committee and the Corporate Secretary shall identify and organize the recommendations for nominees received by the Committee (other than nominees who are executive officers or who are directors standing for


A-3

5.

NOMINEE EVALUATION PROCESS. The Committee will consider as a candidate any director of the Company who has indicated to the Committee that he or she is willing to stand for re-election as well as any other person who is recommended by any shareholders of the Company in accordance with the procedures described under “RECOMMENDED CANDIDATES” in Section 1 and under “5% SHAREHOLDER RECOMMENDATIONS” in Section 2. The Committee


may also undertake its own search process for candidates and may retain the services of professional search firms or other third parties to assist in identifying and evaluating potential nominees and, if fees are paid to such persons in any year, such fees shall be disclosed in the next annual Proxy Statement relating to such year. The Committee may use any process it deems appropriate for the purpose of evaluating candidates which is consistent with the policies set forth in the Charter, Corporate Governance Guidelines and this Director Nomination Policy, which process may include, without limitation, personal interviews, background checks, written submissions by the candidates and third party references. Although the Committee may seek candidates that have different qualities and experiences at different times in order to maximize the aggregate experience, qualities and strengths of the Board members, nominees for each election or appointment of directors shall be evaluated using a substantially similar process and under no circumstances shall the Committee evaluate nominees recommended by a shareholder of the Company pursuant to a process substantially different than that used for other nominees for the same election or appointment of directors.

6.CATEGORIZE RECOMMENDATIONS.For purposes of facilitating disclosure required in the Proxy Statement, the Committee and the Corporate Secretary shall identify and organize the recommendations for nominees received by the Committee (other than nominees who are executive officers or who are directors standing for re-election) in accordance with one or more of the following categories of persons or entities that recommended that nominee:

(1)a shareholder, a 5% shareholder, independent director, chief executive officer, or other executive officer of the Company;

(2)a third-party search firm used by or on behalf of the Company; and

(3)any other specified source.

7.VOTINGFOR DIRECTORS.
re-election) in accordance with one or more of the following categories of persons or entities that recommended that nominee:
(1) a shareholder, a 5% shareholder, independent director, chief executive officer, or other executive officer of the Company;
(2) a third-party search firm used by or on behalf of the Company; and
(3) any other specified source.
7. Voting for Directors.  Each director and each nominee for election as director shall agree, by serving as a director or by accepting nomination for election as a director, that if while serving as a director such director is a nominee for re-election as a director at an annual meeting of the shareholders and fails to obtain the necessary shareholder vote, as provided in the Company’s By-Laws, to be re-elected as a director at the annual meeting, he or she shall tender his or her resignation as a director for consideration by the Committee. The Committee shall evaluate the best interests of the Company and its shareholders and shall recommend to the Board the action to be taken with respect to such tendered resignation.

8.MATERIAL CHANGESTO NOMINATION PROCEDURES.For proposes of facilitating disclosure required in Form 10-K and Form 10-Q, the Committee and the Corporate Secretary shall identify any material changes to the procedures for shareholder nominations of directors for the reporting period in which such material changes occur.

9.POSTINGOF POLICY.This Director Nomination Policy shall be posted to the Company’s website in accordance with the Company’s Corporate Governance Guidelines.

10.AMENDMENTSTO THIS POLICY. Any amendments to this Director Nomination Policy must be approved by the Committee and ratified by the Board.

11.APPLICABILITYTO REGISTERED COMPANIES. This Director Nomination Policy shall apply to all Company subsidiaries which are registered companies under the Securities Exchange Act of 1934 and that are required to file a proxy statement pursuant thereto,provided that the independence requirements contained herein shall not apply to such registered companies which constitute “controlled companies” within the meaning of NYSE listing requirements pursuant to an election by each controlled company, as permitted under NYSE listing requirements.

August 28, 2005

APPENDIX B

Ameren Corporation

2006 Omnibus Incentive Compensation Plan

Effective May 2, 2006


Contents

Article 1.   Establishment, Purpose, and Duration

B-1

Article 2.   Definitions

B-1

Article 3.   Administration

B-4

Article 4.   Shares Subject to this Plan and Maximum Awards

B-5

Article 5.   Eligibility and Participation

B-7

Article 6.   Stock Options

B-7

Article 7.   Stock Appreciation Rights

B-8

Article 8.   Restricted Stock and Restricted Stock Units

B-9

Article 9.   Performance Units/Performance Shares

B-10

Article 10. Cash-Based Awards and Other Stock-Based Awards

B-11

Article 11. Transferability of Awards

B-12

Article 12. Performance Measures

B-12

Article 13. Director Awards

B-13

Article 14. Dividend Equivalents

B-13

Article 15. Beneficiary Designation

B-13

Article 16. Rights of Participants

B-14

Article 17. Change of Control

B-14

Article 18. Amendment, Modification, Suspension, and Termination

B-14

Article 19. Withholding

B-15

Article 20. Successors

B-15

Article 21. General Provisions

B-15


Ameren Corporation

2006 Omnibus Incentive Compensation Plan

Article 1. Establishment, Purpose, and Duration

1.1    Establishment. Ameren Corporation, a Missouri corporation (hereinafter referred to as the “Company”), establishes an incentive compensation plan to be known as the Ameren Corporation 2006 Omnibus Incentive Compensation Plan (hereinafter referred to as the “Plan”), as set forth in this document.

This Plan permits the grant of Nonqualified Stock Options, Incentive Stock Options, Stock Appreciation Rights, Restricted Stock, Restricted Stock Units, Performance Shares, Performance Units, Cash-Based Awards and Other Stock-Based Awards.

This Plan shall become effective upon shareholder approval (the “Effective Date”) and shall remain in effect as provided in Section 1.3 hereof. The Company may make contingent Awards before the Effective Date, provided that the vesting, exercise, or payment of such Awards is expressly conditioned on shareholder approval and the Awards are forfeited if shareholders do not approve the Plan.

1.2    Purpose of this Plan. The purpose of this Plan is to provide a means whereby Employees and Directors of the Company develop a sense of proprietorship and personal involvement in the development and financial success of the Company, and to encourage them to devote their best efforts to the business of the Company, thereby advancing the interests of the Company and its shareholders. A further purposeshareholders and shall recommend to the Board the action to be taken with respect to such tendered resignation.

8. Material Changes to Nomination Procedures.  For proposes of this Plan isfacilitating disclosure required inForm 10-K andForm 10-Q, the Committee and the Corporate Secretary shall identify any material changes to provide a means throughthe procedures for shareholder nominations of directors for the reporting period in which such material changes occur.
9. Posting of Policy.  This Director Nomination Policy shall be posted to the Company may attract able individuals to become Employees or serve as Directors of the Company.

1.3    Duration of this Plan. Unless sooner terminated as provided herein, this Plan shall terminate ten (10) years from the Effective Date. After this Plan is terminated, no Awards may be granted but Awards previously granted shall remain outstandingCompany’s website in accordance with their applicable terms and conditions andthe Company’s Corporate Governance Guidelines.

10. Amendments to This Policy.  Any amendments to this Plan’s terms and conditions. Notwithstanding the foregoing, no Incentive Stock Options mayDirector Nomination Policy must be granted more than ten (10) years after the earlier of (a) adoption of this Plan by the Board, or (b) the Effective Date.

Article 2. Definitions

Whenever used in this Plan, the following terms shall have the meanings set forth below, and when the meaning is intended, the initial letter of the word shall be capitalized.

2.1“Affiliate” shall mean any corporation or other entity (including, but not limited to, a partnership or a limited liability company) that is affiliated with the Company through stock or equity ownership or otherwise, and is designated as an Affiliate for purposes of this Plan by the Committee.

2.2    “Annual Award Limit”or “Annual Award Limits” have the meaning set forth in Section 4.3.

2.3    “Award” means, individually or collectively, a grant under this Plan of Nonqualified Stock Options, Incentive Stock Options, SARs, Restricted Stock, Restricted Stock Units, Performance Shares, Performance Units, Cash-Based Awards, or Other Stock-Based Awards, in each case subject to the terms of this Plan.

2.4    “Award Agreement” means either (i) an agreement entered into by the Company and a Participant setting forth the terms and provisions applicable to an Award granted under this Plan, or (ii) a written or electronic statement issued by the Company to a Participant describing the terms and provisions of such Award, including any amendment or modification thereof. The Committee may provide for the use of electronic, internet or other non-paper Award Agreements, and the use of electronic, internet or other non-paper means for the acceptance thereof and actions thereunder by a Participant.

2.5    “Board” or“Board of Directors” means the Board of Directors of the Company.

2.6    “Cash-Based Award” means an Award, denominated in cash, granted to a Participant as described in Article 10.

2.7    “Code” means the U.S. Internal Revenue Code of 1986, as amended from time to time. For purposes of this Plan, references to sections of the Code shall be deemed to include references to any applicable regulations or other published guidance thereunder and any successor or similar provision.

2.8“Committee” means the Human Resources Committee of the Board or a subcommittee thereof, or any other committee designated by the Board to administer this Plan. The members of the Committee shall be appointed from time to time by and shall serve at the discretion of the Board. The Committee shall consist of two or more persons, each of whom qualifies as a “non-employee director” within the meaning of Rule 16b-3 of the Exchange Act and as an “outside director” within the meaning of Code Section 162(m). If the Committee does not exist or cannot function for any reason, the Board may take any action under the Plan that would otherwise be the responsibility of the Committee.

2.9    “Company” means Ameren Corporation, a Missouri corporation, and any successor thereto as provided in Article 21 herein.

2.10    “Covered Employee” means any Employee who is or may become a “Covered Employee,” as defined in Code Section 162(m), and who is designated, either as an individual Employee or class of Employees,approved by the Committee withinand ratified by the shorter of (i) ninety (90) days after the beginning of the Performance Period, or (ii) before twenty-five percent (25%) of the Performance Period has elapsed, as a “Covered Employee”Board.

11. Applicability to Registered Companies.  This Director Nomination Policy shall apply to all Company subsidiaries which are registered companies under this Plan for such applicable Performance Period.

2.11    “Director”means any individual who is a member of the Board of Directors of the Company and who is not an employee of the Company.

2.12“Director Award” means any Award granted, whether singly, in combination, or in tandem, to a Participant who is a Director pursuant to such applicable terms, conditions, and limitations as the Board or Committee may establish in accordance with this Plan.

2.13    “Effective Date” has the meaning set forth in Section 1.1.

2.14    “Employee” means any individual designated as an employee of the Company, its Affiliates, and/or its Subsidiaries on the payroll records thereof.

2.15    “Exchange Act” means the Securities Exchange Act of 1934 as amended from time to time, or any successor act thereto.

2.16    “Fair Market Value” or“FMV”means a priceand that is based on the opening, closing, actual, high, low, or average selling prices of a Share reported on the New York Stock Exchange (“NYSE”) or other established stock exchange (or exchanges) on the applicable date, the preceding trading day,

the next succeeding trading day, or an average of trading days, as determined by the Committee in its discretion. Unless the Committee determines otherwise, Fair Market Value shall be the closing price of a Share on the most recent date on which Shares were publicly traded. In the event Shares are not publicly traded at the time a determination of their value is required to be made hereunder,file a proxy or information statement pursuant thereto, provided that the determinationindependence requirements contained herein shall not apply to such registered companies which constitute “controlled companies” within the meaning of their Fair Market Value shall be made by the Committee in such manner as it deems appropriate. If Fair Market Value is a price other than the closing price of a Share on the most recent date on which Shares were publicly traded, the definition of FMV shall be specified in the Award Agreement.

2.17    “Full Value Award”means an Award other than in the form of an ISO, NQSO, or SAR, and which is settled by the issuance of Shares.

2.18    “Grant Price”means the price established at the time of grant of an SAR pursuant to Article 7, used to determine whether there is any payment due upon exercise of the SAR.

2.19    “Incentive Stock Option”or “ISO”means an Option to purchase Shares granted under Article 6 to an Employee and that is designated as an Incentive Stock Option and that is intended to meet theNYSE listing requirements of Code Section 422, or any successor provision.

2.20    “Nonqualified Stock Option” or“NQSO” means an Option that is not intended to meet the requirements of Code Section 422, or that otherwise does not meet such requirements.

2.21    “Option” means an Incentive Stock Option or a Nonqualified Stock Option, as described in Article 6.

2.22    “Option Price” means the price at which a Share may be purchased by a Participant pursuant to an Option.election by each controlled company, as permitted under NYSE listing requirements.

October 13, 2006


A-4


(AMEREN LOGO)
VOTE BY INTERNET —www.proxyvote.com
Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 P.M. Eastern Time on April 20, 2007. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.
ELECTRONIC DELIVERY OF FUTURE SHAREHOLDER COMMUNICATIONS
If you would like to reduce the costs incurred by Ameren Corporation in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access shareholder communications electronically in future years.
VOTE BY PHONE — 1-800-690-6903
Use any touch-tone telephone to transmit your voting instructions up until 11:59 P.M. Eastern Time on April 20, 2007. Have your proxy card in hand when you call and then follow the instructions.
VOTE BY MAIL
Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Ameren Corporation, c/o ADP, 51 Mercedes Way, Edgewood, NY 11717.


TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:AMREN 1KEEP THIS PORTION FOR YOUR RECORDS
DETACH AND RETURN THIS PORTION ONLY
THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED

             
AMEREN CORPORATION
             
  THE BOARD OF DIRECTORS RECOMMENDS VOTING
FOR ITEMS 1 AND 2 AND AGAINST ITEM 3
             
  Vote On Directors
  ITEM 1
ELECTION OF DIRECTORS — NOMINEES FOR DIRECTOR
             
   01) STEPHEN F. BRAUER  07) CHARLES W. MUELLER
   02) SUSAN S. ELLIOTT  08) DOUGLAS R. OBERHELMAN
   03) GAYLE P.W. JACKSON  09) GARY L. RAINWATER
   04) JAMES C. JOHNSON  10) HARVEY SALIGMAN
   05) RICHARD A. LIDDY  11) PATRICK T. STOKES
   06) GORDON R. LOHMAN  12) JACK D. WOODARD
For
All
Withhold
All
For All
Except
To withhold authority to vote for any individual nominee(s), mark “For All Except” and write the number(s) of the nominee(s) on the line below.
ooo


Vote on Proposals
ForAgainstAbstain
ITEM 2 — RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTANTSooo
ITEM 3 — SHAREHOLDER PROPOSAL RELATING TO REPORT ON CALLAWAY PLANT RELEASESooo
Each of the foregoing proposals is more fully described in the accompanying proxy statement.
Shares registered in the name of a Custodian or Guardian must be signed by such. Executors, administrators, trustees, etc. should so indicate when signing.
This proxy will be voted as specified above. If no direction is made, this proxy will be voted FOR all nominees listed above and as recommended by the Board on the other items listed above.
YesNo
Please indicate if you plan to attend this meeting.oo
HOUSEHOLDING ELECTION — Please indicate if you consent to receive certain future investor communications in a single package per household.
oo
Signature (PLEASE SIGN WITHIN BOX)DateSignature (Joint Owners)Date

 

2.23    “Option Term”means the period of time an Option is exercisable as the Committee shall determine at the time of grant; provided, however, no Option shall be exercisable later than the tenth (10th) anniversary date of its grant.


(AMEREN LOGO)
Admission ticket
2.24    “Other Stock-Based Award”(Not Transferable)means an equity-based or equity-related Award not otherwise described by the terms of
AMEREN CORPORATION
ANNUAL MEETING OF SHAREHOLDERS
Tuesday, April 24, 2007
9:00 a.m. CST
The Saint Louis Art Museum in Forest Park
One Fine Arts Drive
St. Louis, MO 63110
Please present this Plan, granted pursuant to Article 10.

2.25    “Participant” means any eligible individual as set forth in Article 5 to whom an Award is granted.

2.26    “Performance-Based Compensation” means compensation under an Award that is intended to satisfy the requirements of Code Section 162(m) for certain performance-based compensation paid to Covered Employees.

2.27    “Performance Measures” means measures as described in Article 12 on which the performance goals are based and which are approved by the Company’s shareholders pursuant to this Planadmission ticket in order to qualify Awards as Performance-Based Compensation.

2.28    “Performance Period” means the period of time during which the performance goals must be met in order to determine the degree of payout and/or vesting with respect to an Award.

2.29    “Performance Share” means an Award under Article 9 herein and subjectgain admittance to the terms of this Plan, denominated in Shares,meeting. This ticket admits
only the value of which at the time it is payable is determined as a function of the extent to which corresponding performance criteria have been achieved.

2.30    “Performance Unit” means an Award under Article 9 herein and subject to the terms of this Plan, denominated in dollars, the value of which at the time it is payable is determined as a function of the extent to which corresponding performance criteria have been achieved.

2.31    “Period of Restriction” means the period when Restricted Stock or Restricted Stock Units are subject to a substantial risk of forfeiture (basedshareholder listed on the performance of services, the achievement of performance goals, or the occurrence of other events as determined by the Committee, in its discretion), as provided in Article 8.

2.32    “Person”shall have the meaning ascribed to such term in Section 3(a)(9) of the Exchange Actreverse side and used in Sections 13(d) and 14(d) thereof, including a “group” as defined in Section 13(d) thereof.

2.33    “Plan” means the Ameren Corporation 2006 Omnibus Incentive Compensation Plan.

2.34    “Plan Year”means the calendar year.

2.35    “Prior Plan”means the Company’s Long-Term Incentive Plan of 1998.

2.36    “Restricted Stock means an Award granted to a Participant pursuant to Article 8.

2.37    “Restricted Stock Unit” means an Award granted to a Participant pursuant to Article 8.

2.38    “Share” means a share of common stock of the Company, $.01 par value per share.

2.39    “Stock Appreciation Right” or“SAR” means an Award, designated as an SAR, pursuant to the terms of Article 7 herein.

2.40    “Subsidiary” means any corporation or other entity, whether domestic or foreign, in which the Company has or obtains, directly or indirectly, a proprietary interest of more than fifty percent (50%) by reason of stock ownership or otherwise.

Article 3. Administration

3.1    General. The Committee shall be responsible for administering this Plan, subject to this Article 3 and the other provisions of this Plan. The Committee may employ attorneys, consultants, accountants, agents, and other individuals, any of whom may be an Employee, and the Committee, the Company, and its officers and Directors shall be entitled to rely upon the advice, opinions, or valuations of any such individuals. All actions taken and all interpretations and determinations made by the Committee shall be final and binding upon the Participants, the Company, and all other interested individuals.

3.2    Authority of the Committee. The Committee shall have full discretionary power to interpret the terms and the intent of this Plan and any Award Agreement or other agreement or document ancillary to or in connection with this Plan, to determine eligibility for Awards and to adopt such rules, regulations, forms, instruments, and guidelines for administering this Plan as the Committee may deem necessary or proper. Such authority shall include, butis not be limited to, selecting Award recipients, establishing all Award terms and conditions, including the terms and conditions set forth in Award Agreements, granting Awards as an alternative to or as the form of payment for grants or rights earned or due under compensation plans or arrangements of the Company, construing any ambiguous provision of the Plan or any Award Agreement, and, subject to Article 18, adopting modifications and amendments to this Plan or any Award Agreement, including without limitation, any that are necessary to comply with the laws of the countries and other jurisdictions in which the Company, its Affiliates, and/or its Subsidiaries operate.

transferable.

3.3    Delegation. The Committee may delegate to one or more of its members or to one or more officers of the Company, and/or its Subsidiaries and Affiliates or to one or more agents or advisors such administrative duties or powers as it may deem advisable, and the Committee or any individuals to whom it has delegated duties or powers as aforesaid may employ one or more individuals to render advice with respect to any responsibility the Committee or such individuals may have under this Plan. The Committee may, by resolution, authorize one or more officers of the Company to do one or both of the following on the same basis as can the Committee: (a) designate Employees to be recipients of Awards; and (b) determine the size of any such Awards; provided, however, (i) the Committee shall not delegate such responsibilities to any such officer for Awards granted to an Employee who is, on the relevant date, a Covered Employee, or an officer, Director, or more than ten percent (10%) beneficial owner of the Company for purposes of Section 16 of the Exchange Act; (ii) the resolution providing such authorization sets forth the total number of Awards such officer(s) may grant; and (iii) the officer(s) shall report periodically to the Committee regarding the nature and scope of the Awards granted pursuant to the authority delegated.

Article 4. Shares Subject to this Plan and Maximum Awards

4.1    Number of Shares Available for Awards.

(a) Subject to adjustment as provided in Section 4.4 herein, the maximum number of Shares available for grant to Participants under this Plan (the “Share Authorization”) shall be 4,000,000 Shares. All Shares not granted or subject to outstanding awards under the Company’s Prior Plan as of the Effective Date and any Shares subject to outstanding awards as of the Effective Date under the Prior Plan that on or after the Effective Date cease for any reason to be subject to such awards shall be encompassed within this Share Authorization. As a result, no awards may be made under the Prior Plan after the Effective Date.

(b) Flexible Share Authorization: To the extent that a Share is issued pursuant to the grant or exercise of a Full Value Award, it shall reduce the Share Authorization by one (1) Share; and, to the extent that a Share is issued pursuant to the grant or exercise of an Award other than a Full Value Award, it shall reduce the Share Authorization by .47 of a Share.

(c) The maximum number of Shares that may be issued pursuant to ISOs under this Plan shall be equal to the Share Authorization.

4.2    Share Usage. Shares covered by an Award shall be counted as used only to the extent they are actually issued; however, the full number of shares covered by Stock Appreciation Rights granted that are to be settled by the issuance of Shares shall be counted against the number of Shares available for award under the Plan, regardless of the number of Shares actually issued upon settlement of such Stock Appreciation Rights. Any Shares related to Awards which terminate by expiration, forfeiture, cancellation, or otherwise without the issuance of such Shares, are settled in cash in lieu of Shares, or are exchanged with the Committee’s permission, prior to the issuance of Shares, for Awards not involving Shares, shall be available again for grant under this Plan. The Shares available for issuance under this Plan may be authorized and unissued Shares or treasury Shares.

4.3    Annual Award Limits. Unless and until the Committee determines that an Award to a Covered Employee shall not be designed to qualify as Performance-Based Compensation, the following limits (each an “Annual Award Limit” and, collectively, “Annual Award Limits”) shall apply to grants of Awards under this Plan:

(a)Options: The maximum aggregate number of Shares subject to Options granted in any one Plan Year to any one Participant shall be two million (2,000,000).

(b)SARs: The maximum aggregate number of Shares subject to Stock Appreciation Rights granted in any one Plan Year to any one Participant shall be two million (2,000,000).

(c)Restricted Stock or Restricted Stock Units: The maximum aggregate grant with respect to Awards of Restricted Stock or Restricted Stock Units in any one Plan Year to any one Participant shall be three hundred thousand (300,000) Shares.

(d)Performance Units or Performance Shares: The maximum aggregate number of Performance Units or Performance Shares that a Participant may be awarded in any one Plan Year shall be three hundred thousand (300,000) Shares. As noted in Section 9.3, up to two and one-half Shares (or the cash value of two and one-half Shares) may be issued with respect to a Performance Unit or Performance Share, depending on the level of performance.

(e)Cash-Based Awards: The maximum aggregate amount awarded with respect to Cash-Based Awards to any one Participant in any one Plan Year may not exceed five million ($5,000,000) dollars determined as of the date of vesting.

(f)Other Stock-Based Awards. The maximum aggregate grant with respect to Other Stock-Based Awards pursuant to Section 10.2 in any one Plan Year to any one Participant shall be three hundred thousand (300,000) Shares.

4.4    Adjustments in Authorized Shares. In the event of any corporate event or transaction (including, but not limited to, a change in the Shares of the Company or the capitalization of the Company) such as a merger, consolidation, reorganization, recapitalization, separation, partial or complete liquidation, stock dividend, stock split, reverse stock split, split up, spin-off, or other distribution of stock or property of the Company, combination of Shares, exchange of Shares, dividend in kind, or other like change in capital structure, number of outstanding Shares or distribution (other than normal cash dividends) to shareholders of the Company, or any similar corporate event or transaction, or in the event of unusual or nonrecurring events affecting the Company or the financial statements of the Company or of changes in applicable laws, regulations, or accounting principles, the Committee, in its sole discretion, in order to prevent dilution or enlargement of Participants’ rights under this Plan, shall substitute or adjust, as applicable, the number and kind of Shares that may be issued under this Plan or under particular forms of Awards, the number and kind of Shares subject to outstanding Awards, the Option Price or Grant Price applicable to outstanding Awards, the Annual Award Limits, and other value determinations applicable to outstanding Awards.

The Committee, in its sole discretion, may also make appropriate adjustments in the terms of any Awards under this Plan to reflect, or related to, such changes or distributions and to modify any other terms of outstanding Awards, including modifications of performance goals and changes in the length of Performance Periods. The Committee shall not make any adjustment pursuant to this Section 4.4 that would prevent Performance-Based Compensation from satisfying the requirements of Code Section 162(m); that would cause an Award that is otherwise exempt from Code Section 409A to become subject to Section 409A, or that would cause an Award that is subject to Code Section 409A to fail to satisfy the requirements of Section 409A. The determination of the Committee as to the foregoing adjustments, if any, shall be conclusive and binding on Participants under this Plan.

Subject to the provisions of Article 18 and notwithstanding anything else herein to the contrary, without affecting the number of Shares reserved or available hereunder, the Committee may authorize the issuance or assumption of benefits under this Plan in connection with any merger, consolidation, acquisition of property or stock, or reorganization upon such terms and conditions as it may deem appropriate (including, but not limited to, a conversion of equity awards into Awards under this Plan in a manner consistent with paragraph 53 of FASB Interpretation No. 44), subject to compliance with the rules under Code Sections 409A, 422, and 424, as and where applicable.

Article 5. Eligibility and Participation

5.1    Eligibility. Individuals eligible to participate in this Plan include all Employees and Directors.

5.2    Actual Participation. Subject to the provisions of this Plan, the Committee may, from time to time, select from all eligible individuals, those individuals to whom Awards shall be granted and shall determine, in its sole discretion, the nature of any and all terms permissible by law, and the amount of each Award.

Article 6. Stock Options

6.1    Grant of Options. Subject to the terms and provisions of this Plan, Options may be granted to Participants in such number, and upon such terms, and at any time and from time to time as shall be determined by the Committee, in its sole discretion;provided that ISOs may be granted only to eligible Employees of the Company or of any parent or subsidiary corporation (as permitted under Code Sections 422 and 424).

6.2    Award Agreement. Each Option grant shall be evidenced by an Award Agreement that shall specify the Option Price, the maximum duration of the Option, the number of Shares to which the Option pertains, the conditions upon which an Option shall become vested and exercisable, and such other provisions as the Committee shall determine which are not inconsistent with the terms of this Plan. The Award Agreement also shall specify whether the Option is intended to be an ISO or a NQSO.

6.3    Option Price. The Option Price for each grant of an Option under this Plan shall be determined by the Committee in its sole discretion and shall be specified in the Award Agreement; provided, however, the Option Price must be at least equal to one hundred percent (100%) of the FMV of the Shares as determined on the date of grant.

6.4    Term of Options. Each Option granted to a Participant shall expire at such time as the Committee shall determine and set forth in the Award Agreement at the time of grant; provided, however, no Option shall be exercisable later than the tenth (10th) anniversary date of its grant. Notwithstanding the foregoing, for Nonqualified Stock Options granted to Participants outside the United States, the Committee has the authority to grant Nonqualified Stock Options that have a term greater than ten (10) years.

6.5    Exercise of Options. Options granted under this Article 6 shall be exercisable at such times and be subject to such restrictions and conditions as the Committee shall in each instance approve, which terms and restrictions need not be the same for each grant or for each Participant.

6.6    Payment. Options granted under this Article 6 shall be exercised by the delivery of a notice of exercise to the Company or an agent designated by the Company in a form specified or accepted by the Committee, or by complying with any alternative procedures which may be authorized by the Committee, setting forth the number of Shares with respect to which the Option is to be exercised, accompanied by full payment for the Shares. The Shares shall become the property of the Participant on the exercise date, subject to any forfeiture conditions specified in the Option.

A condition of the issuance of the Shares as to which an Option shall be exercised shall be the payment of the Option Price at the time of the exercise. The Option Price of any Option shall be payable to the Company in full either: (a) in cash or its equivalent; (b) by tendering (either by actual delivery or attestation) previously acquired Shares having an aggregate Fair Market Value at the time of exercise equal to the Option Price (provided that except as otherwise determined by the Committee,

the Shares that are tendered must have been held by the Participant for at least six (6) months (or such other period, if any, as the Committee may permit) prior to their tender to satisfy the Option Price if acquired under this Plan or any other compensation plan maintained by the Company or have been purchased on the open market); (c) by a cashless (broker-assisted) exercise; (d) by a combination of (a), (b) and/or (c); or (e) any other method approved or accepted by the Committee in its sole discretion.

Subject to any governing rules or regulations, as soon as practicable after receipt of written notification of exercise and full payment (including satisfaction of any applicable tax withholding), the Company shall deliver to the Participant a statement of holdings as evidence of book entry uncertificated Shares, or at the sole discretion of the Committee upon the Participant’s request, Share certificates in an appropriate amount based upon the number of Shares purchased under the Option(s).

Unless otherwise determined by the Committee, all payments under all of the methods indicated above shall be paid in United States dollars.

6.7    Restrictions on Share Transferability. The Committee may impose such restrictions on any Shares acquired pursuant to the exercise of an Option granted under this Article 6 as it may deem advisable, including, without limitation, minimum holding period requirements, restrictions under applicable federal securities laws, under the requirements of any stock exchange or market upon which such Shares are then listed and/or traded, or under any blue sky or state securities laws applicable to such Shares.

6.8    Termination of Employment. Each Participant’s Award Agreement shall set forth the extent to which the Participant shall have the right to exercise the Option following termination of the Participant’s employment or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with each Participant, need not be uniform among all Options issued pursuant to this Article 6, and may reflect distinctions based on the reasons for termination.

Article 7. Stock Appreciation Rights

7.1    Grant of SARs. Subject to the terms and conditions of this Plan, SARs may be granted to Participants at any time and from time to time as shall be determined by the Committee.

Subject to the terms and conditions of this Plan, the Committee shall have complete discretion in determining the number of SARs granted to each Participant and, consistent with the provisions of this Plan, in determining the terms and conditions pertaining to such SARs.

The Grant Price for each grant of an SAR shall be determined by the Committee and shall be specified in the Award Agreement; provided, however, the Grant Price on the date of grant must be at least equal to one hundred percent (100%) of the FMV of the Shares as determined on the date of grant.

7.2    SAR Agreement. Each SAR Award shall be evidenced by an Award Agreement that shall specify the Grant Price, the term of the SAR, and such other provisions as the Committee shall determine.

7.3    Term of SAR. The term of an SAR granted under this Plan shall be determined by the Committee, in its sole discretion, and set forth in the Award Agreement at the time of grant. Except as

determined otherwise by the Committee and specified in the SAR Award Agreement, no SAR shall be exercisable later than the tenth (10th) anniversary date of its grant.

7.4    Exercise of SARs. SARs may be exercised upon whatever terms and conditions the Committee, in its sole discretion, imposes.

7.5    Settlement of SARs. Upon the exercise of an SAR, a Participant shall be entitled to receive payment from the Company on the exercise date in an amount determined by multiplying:

(a) The excess of the Fair Market Value of a Share on the date of exercise over the Grant Price; by

(b) The number of Shares with respect to which the SAR is exercised.

At the discretion of the Committee, the payment upon SAR exercise may be in cash, Shares, or any combination thereof, or in any other manner approved by the Committee in its sole discretion. The Committee’s determination regarding the form of SAR payout shall be set forth in the Award Agreement pertaining to the grant of the SAR.

7.6    Termination of Employment. Each Award Agreement shall set forth the extent to which the Participant shall have the right to exercise the SAR following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with Participants, need not be uniform among all SARs issued pursuant to this Plan, and may reflect distinctions based on the reasons for termination.

7.7    Other Restrictions. The Committee shall impose such other conditions and/or restrictions on any Shares received upon exercise of an SAR granted pursuant to this Plan as it may deem advisable or desirable. These restrictions may include, but shall not be limited to, a requirement that the Participant hold the Shares received upon exercise of an SAR for a specified period of time.

Article 8. Restricted Stock and Restricted Stock Units

8.1    Grant of Restricted Stock or Restricted Stock Units. Subject to the terms and provisions of this Plan, the Committee, at any time and from time to time, may grant Shares of Restricted Stock and/or Restricted Stock Units to Participants in such amounts as the Committee shall determine. Restricted Stock Units shall be similar to Restricted Stock except that no Shares are actually awarded to the Participant on the date of grant.

8.2    Restricted Stock or Restricted Stock Unit Agreement. Each Restricted Stock and/or Restricted Stock Unit grant shall be evidenced by an Award Agreement that shall specify the Period(s) of Restriction, the number of Shares of Restricted Stock or the number of Restricted Stock Units granted, and such other provisions as the Committee shall determine.

8.3    Other Restrictions. The Committee shall impose such other conditions and/or restrictions on any Shares of Restricted Stock or Restricted Stock Units granted pursuant to this Plan as it may deem advisable including, without limitation, a requirement that Participants pay a stipulated purchase price for each Share of Restricted Stock or each Restricted Stock Unit, restrictions based upon the achievement of specific performance goals, time-based restrictions on vesting following the attainment of the performance goals, time-based restrictions, and/or restrictions under applicable laws or under the requirements of any stock exchange or market upon which such Shares are listed or traded, or holding requirements or sale restrictions placed on the Shares by the Company upon vesting of such Restricted Stock or Restricted Stock Units.

To the extent deemed appropriate by the Committee, the Company may retain any certificates or statements of holdings representing Shares of Restricted Stock in the Company’s possession until such time as all conditions and/or restrictions applicable to such Shares have been satisfied or lapse.

Except as otherwise provided in this Article 8, Shares of Restricted Stock covered by each Restricted Stock Award shall become freely transferable by the Participant after all conditions and restrictions applicable to such Shares have been satisfied or lapse (including satisfaction of any applicable tax withholding obligations), and Restricted Stock Units shall be paid in cash, Shares, or a combination of cash and Shares as the Committee, in its sole discretion shall determine.

8.4    Certificate Legend. In addition to any legends placed on certificates or statements of holdings pursuant to Section 8.3, each certificate or statement of holdings representing Shares of Restricted Stock granted pursuant to this Plan may bear a legend such as the following or as otherwise determined by the Committee in its sole discretion:

The sale or transfer of Shares of stock represented by this certificate or statement of holdings, whether voluntary, involuntary, or by operation of law, is subject to certain restrictions on transfer as set forth in the Ameren Corporation 2006 Omnibus Incentive Compensation Plan, and in the associated Award Agreement. A copy of the Plan and such Award Agreement may be obtained from Ameren Corporation.

8.5    Voting Rights. Unless otherwise determined by the Committee and set forth in a Participant’s Award Agreement, to the extent permitted or required by law, as determined by the Committee, Participants holding Shares of Restricted Stock granted hereunder may be granted the right to exercise full voting rights with respect to those Shares during the Period of Restriction. A Participant shall have no voting rights with respect to any Restricted Stock Units granted hereunder.

8.6    Termination of Employment. Each Award Agreement shall set forth the extent to which the Participant shall have the right to retain Restricted Stock and/or Restricted Stock Units following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with each Participant, need not be uniform among all Shares of Restricted Stock or Restricted Stock Units issued pursuant to this Plan, and may reflect distinctions based on the reasons for termination.

8.7    Section 83(b) Election. The Committee may provide in an Award Agreement that the Award of Restricted Stock is conditioned upon the Participant making or refraining from making an election with respect to the Award under Code Section 83(b). If a Participant makes an election pursuant to Code Section 83(b) concerning a Restricted Stock Award, the Participant shall be required to file promptly a copy of such election with the Company.

Article 9. Performance Units/Performance Shares

9.1    Grant of Performance Units/Performance Shares. Subject to the terms and provisions of this Plan, the Committee, at any time and from time to time, may grant Performance Units and/or Performance Shares to Participants in such amounts and upon such terms as the Committee shall determine.

9.2    Value of Performance Units/Performance Shares. Each Performance Unit shall have an initial value that is established by the Committee at the time of grant. Each Performance Share shall have an initial value equal to the Fair Market Value of a Share on the date of grant. The Committee shall set performance goals in its discretion which, depending on the extent to which they are met, will determine the value and/or number of Performance Units/Performance Shares that will be paid out to the Participant.

9.3    Earning of Performance Units/Performance Shares. Subject to the terms of this Plan, after the applicable Performance Period has ended, the holder of Performance Units/Performance Shares shall be entitled to receive payout as provided in Section 9.4 on the value and number of Performance Units/Performance Shares earned by the Participant over the Performance Period, to be determined as a function of the extent to which the corresponding performance goals have been achieved. Regardless of the level of performance achieved, in no event will the number of Shares issued (or the amount of cash paid) with respect to a Performance Unit/Performance Share exceed two and one-half Shares (or the value of two and one-half Shares).

9.4    Form and Timing of Payment of Performance Units/Performance Shares. Payment of earned Performance Units/Performance Shares shall be as determined by the Committee and as evidenced in the Award Agreement. Subject to the terms of this Plan, the Committee, in its sole discretion, may pay earned Performance Units/Performance Shares in the form of cash or in Shares (or in a combination thereof) equal to the value of the earned Performance Units/Performance Shares at the close of the applicable Performance Period, or as soon as practicable after the end of the Performance Period. Any Shares may be granted subject to any restrictions deemed appropriate by the Committee. The determination of the Committee with respect to the form of payout of such Awards shall be set forth in the Award Agreement pertaining to the grant of the Award.

9.5    Termination of Employment. Each Award Agreement shall set forth the extent to which the Participant shall have the right to retain Performance Units and/or Performance Shares following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee, shall be included in the Award Agreement entered into with each Participant, need not be uniform among all Awards of Performance Units or Performance Shares issued pursuant to this Plan, and may reflect distinctions based on the reasons for termination.

Article 10. Cash-Based Awards and Other Stock-Based Awards

10.1    Grant of Cash-Based Awards. Subject to the terms and provisions of the Plan, the Committee, at any time and from time to time, may grant Cash-Based Awards to Participants in such amounts and upon such terms as the Committee may determine.

10.2    Other Stock-Based Awards. The Committee may grant other types of equity-based or equity-related Awards not otherwise described by the terms of this Plan (including the grant or offer for sale of unrestricted Shares) in such amounts and subject to such terms and conditions as the Committee shall determine. Such Awards may involve the transfer of actual Shares to Participants, or payment in cash or otherwise of amounts based on the value of Shares and may include, without limitation, Awards designed to comply with or take advantage of the applicable local laws of jurisdictions other than the United States.

10.3    Value of Cash-Based and Other Stock-Based Awards. Each Cash-Based Award shall specify a payment amount or payment range as determined by the Committee. Each Other Stock-Based Award shall be expressed in terms of Shares or units based on Shares, as determined by the Committee. The Committee may establish performance goals in its discretion. If the Committee exercises its discretion to establish performance goals, the number and/or value of Cash-Based Awards or Other Stock-Based Awards that will be paid out to the Participant will depend on the extent to which the performance goals are met.

10.4    Payment of Cash-Based Awards and Other Stock-Based Awards. Payment, if any, with respect to a Cash-Based Award or an Other Stock-Based Award shall be made in accordance with the terms of the Award, in cash or Shares as the Committee determines.

10.5    Termination of Employment. The Committee shall determine the extent to which the Participant shall have the right to receive Cash-Based Awards or Other Stock-Based Awards following termination of the Participant’s employment with or provision of services to the Company, its Affiliates, and/or its Subsidiaries, as the case may be. Such provisions shall be determined in the sole discretion of the Committee. Such provisions may be included in the Award Agreement, but need not be uniform among all Awards of Cash-Based Awards or Other Stock-Based Awards issued pursuant to the Plan, and may reflect distinctions based on the reasons for termination.

Article 11. Transferability of Awards

11.1    Transferability.Except as provided in Section 11.2 below, during a Participant’s lifetime, his or her Awards shall be exercisable only by the Participant. Awards shall not be transferable other than by will or the laws of descent and distribution; no Awards shall be subject, in whole or in part, to attachment, execution, or levy of any kind; and any purported transfer in violation hereof shall be null and void. The Committee may establish such procedures as it deems appropriate for a Participant to designate a beneficiary to whom any amounts payable or Shares deliverable in the event of, or following, the Participant’s death, may be provided.

11.2    Committee Action. The Committee may, in its discretion, determine that notwithstanding Section 11.1, any or all Awards (other than ISOs) shall be transferable to and exercisable by such transferees, and subject to such terms and conditions, as the Committee may deem appropriate; provided, however, no Award may be transferred for value (as defined in the General Instructions to Form S-8 Registration Statement under the Securities Act of 1933, as amended).

Article 12. Performance Measures

12.1    Performance Goals.If an Award (other than an Option or SAR) is intended to qualify as Performance-Based Compensation, the Award shall vest or be paid solely on account of the attainment of an objective performance goal based on one or more of the Performance Measures listed in Section 12.2. The Committee shall establish the performance goal in writing not later than ninety (90) days after the commencement of the Performance Period (or, if earlier, before twenty-five percent (25%) of the Performance Period has elapsed), and at a time when the outcome of the performance goal is still substantially uncertain. The performance goal shall state, in terms of an objective formula or standard, the method for determining the amount of compensation payable to the Participant if the performance goal is attained.

12.2    Performance Measures.The Performance Measures used to establish performance goals for Performance-Based Compensation shall be limited to (a) net earnings or net income (before or after taxes); (b) earnings per share; (c) net sales or revenue growth; (d) net operating profit; (e) return measures (including, but not limited to, return on assets, capital, invested capital, equity, sales, or revenue); (f) cash flow (including, but not limited to, operating cash flow, free cash flow, cash flow return on equity, and cash flow return on investment); (g) earnings before or after taxes, interest, depreciation, and/or amortization; (h) gross or operating margins; (i) gross revenue; (j) productivity ratios; (k) share price (including, but not limited to, growth measures); (l) expense targets; (m) margins; (n) operating efficiency; (o) capacity utilization; (p) increase in customer base; (q) environmental health and safety; (r) diversity; (s) quality; (t) customer satisfaction; (u) working capital targets; (v) economic value added or EVA (net operating profit after tax minus the sum of capital multiplied by the cost of capital); (w) net debt; (x) corporate governance; (y) total shareholder return; (z) dividend; and (aa) bond rating.

Any Performance Measure(s) may be used to measure the performance of the Company, Subsidiary, and/or Affiliate as a whole or any business unit of the Company, Subsidiary, and/or Affiliate

or any combination thereof, as the Committee may deem appropriate, or any of the above Performance Measures as compared to the performance of a group of comparator companies, or published or special index that the Committee, in its sole discretion, deems appropriate, or the Company may select Performance Measure (k) above as compared to various stock market indices. The Committee also has the authority to provide for accelerated vesting of any Award based on the achievement of performance goals pursuant to the Performance Measures specified in this Article 12.

12.3    Evaluation of Performance.The evaluation of performance may include or exclude the effect of any of the following events that occurs during a Performance Period, and the Committee shall specify in writing when it establishes the performance goal whether the effect of one or more such events shall be so included or excluded: (a) asset write-downs, (b) litigation or claim judgments or settlements, (c) the effect of changes in tax laws, accounting principles, laws, regulatory actions or provisions affecting reported results, (d) any reorganization and restructuring programs, (e) extraordinary nonrecurring items as described in Accounting Principles Board Opinion No. 30 and/or in management’s discussion and analysis of financial condition and results of operations appearing in the Company’s annual report to shareholders or Annual Report on Form 10-K, as the case may be, for the applicable year, (f) acquisitions or divestitures, and (g) foreign exchange gains and losses. To the extent such inclusions or exclusions affect Awards to Covered Employees, they shall be prescribed in a form that meets the requirements of Code Section 162(m) for deductibility.

12.4    Certification of Performance. No vesting or payment shall occur under an Award that is intended to qualify as Performance-Based Compensation until the Committee certifies in writing that the performance goal and any other material terms of the Award have been satisfied.

12.5    Adjustment of Performance-Based Compensation. Awards that are intended to qualify as Performance-Based Compensation may not be adjusted upward. The Committee shall retain the discretion to adjust such Awards downward, either on a formula or discretionary basis or any combination, as the Committee determines.

12.6    Committee Discretion. In the event that the Committee determines that it is advisable to grant Awards that shall not qualify as Performance-Based Compensation, the Committee may make such grants without satisfying the requirements of Code Section 162(m), and may base the vesting or payment of such Awards on Performance Measures other than those set forth in Section 12.2.

Article 13. Director Awards

The Board shall determine all Awards to Directors. The terms and conditions of any grant to any such Director shall be set forth in an Award Agreement.

Article 14. Dividend Equivalents

Any Participant selected by the Committee may be granted dividend equivalents based on the dividends declared on Shares that are subject to any Full Value Award, to be credited as of the dividend payment dates, during the period between the date the Full Value Award is granted and the date the Award vests or expires, as determined by the Committee. Such dividend equivalents shall be converted to cash or additional Shares by such formula and at such time and subject to such limitations as may be determined by the Committee.

Article 15. Beneficiary Designation

Each Participant under this Plan may, from time to time, name any beneficiary or beneficiaries (who may be named contingently or successively) to whom any benefit under this Plan is to be paid in case of his death before he receives any or all of such benefit. Each such designation shall revoke all prior designations by the same Participant, shall be in a form prescribed by the Committee, and will be

effective only when filed by the Participant in writing with the Company during the Participant’s lifetime. In the absence of any such beneficiary designation, benefits remaining unpaid or rights remaining unexercised at the Participant’s death shall be paid to or exercised by the Participant’s executor, administrator, or legal representative on behalf of the Participant’s estate.

Article 16. Rights of Participants

16.1    Employment. Nothing in this Plan or an Award Agreement shall interfere with or limit in any way the right of the Company, its Affiliates, and/or its Subsidiaries, to terminate any Participant’s employment or service on the Board or to the Company at any time or for any reason not prohibited by law, nor confer upon any Participant any right to continue his employment or service as a Director for any specified period of time.

Neither an Award nor any benefits arising under this Plan shall constitute an employment contract with the Company, its Affiliates, and/or its Subsidiaries and, accordingly, subject to Articles 3 and 18, this Plan and the benefits hereunder may be terminated at any time in the sole and exclusive discretion of the Committee without giving rise to any liability on the part of the Company, its Affiliates, and/or its Subsidiaries.

16.2    Participation. No individual shall have the right to be selected to receive an Award under this Plan, or, having been so selected, to be selected to receive a future Award.

16.3    Rights as a Shareholder. Except as otherwise provided herein, a Participant shall have none of the rights of a shareholder with respect to Shares covered by any Award until the Participant becomes the record holder of such Shares.

Article 17. Change of Control

The treatment of Awards upon a change in control of the Company shall be set forth in the Award Agreement.

Article 18. Amendment, Modification, Suspension, and Termination

18.1    Amendment, Modification, Suspension, and Termination. Subject to Section 18.2, the Committee may, at any time and from time to time, alter, amend, modify, suspend, or terminate this Plan and any Award Agreement in whole or in part; provided, however, that, without the prior approval of the Company’s shareholders and except as provided in Section 4.4, Options or SARs issued under this Plan will not be repriced, replaced, or regranted through cancellation, or by lowering the Option Price of a previously granted Option or the Grant Price of a previously granted SAR, and no material amendment of this Plan shall be made without shareholder approval if shareholder approval is required by law, regulation, or stock exchange rule, including, but not limited to, the Exchange Act, the Code, and if applicable, the NYSE Listed Company Manual.

18.2    Awards Previously Granted. Notwithstanding any other provision of this Plan to the contrary (other than Section 18.3), no termination, amendment, suspension, or modification of this Plan or an Award Agreement shall adversely affect in any material way any Award previously granted under this Plan, without the written consent of the Participant holding such Award.

18.3    Amendment to Conform to Law. Notwithstanding any other provision of this Plan to the contrary, the Board of Directors may amend the Plan or an Award Agreement, to take effect retroactively or otherwise, as deemed necessary or advisable for the purpose of conforming the Plan or an Award Agreement to any present or future law relating to plans of this or similar nature (including, but not limited to, Code Section 409A), and to the administrative regulations and rulings promulgated thereunder.

Article 19. Withholding

The Company shall have the power and the right to deduct or withhold, or require a Participant to remit to the Company, the minimum statutory amount to satisfy federal, state, and local taxes, domestic or foreign, required by law or regulation to be withheld with respect to any taxable event arising as a result of this Plan. Participants may elect to satisfy the withholding requirements, in whole or in part, by having the Company withhold shares having a Fair Market Value on the date the tax is to be determined equal to the minimum statutory total tax that could be imposed on the transaction. The Participant shall remain responsible at all times for paying any federal, state, and local income or employment tax due with respect to any Award, and the Company shall not be liable for any interest or penalty that a Participant incurs by failing to make timely payments of tax.

Article 20. Successors

All obligations of the Company under this Plan with respect to Awards granted hereunder shall be binding on any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation, or otherwise, of all or substantially all of the business and/or assets of the Company.

Article 21. General Provisions

21.1    Forfeiture Events.

(a) The Committee may specify in an Award Agreement that the Participant’s rights, payments, and benefits with respect to an Award shall be subject to reduction, cancellation, forfeiture, or recoupment upon the occurrence of certain specified events, in addition to any otherwise applicable vesting or performance conditions of an Award. Such events may include, but shall not be limited to, termination of employment for cause (as defined in the Award Agreement), termination of the Participant’s provision of services to the Company, Affiliate, and/or Subsidiary, violation of material Company, Affiliate, and/or Subsidiary policies, breach of noncompetition, confidentiality, or other restrictive covenants that may apply to the Participant, or other conduct by the Participant that is detrimental to the business or reputation of the Company, its Affiliates, and/or its Subsidiaries.

(b) If the Company is required to prepare an accounting restatement due to the material noncompliance of the Company, as a result of misconduct, with any financial reporting requirement under the securities laws, if the Participant knowingly or grossly negligently engaged in the misconduct, or knowingly or grossly negligently failed to prevent the misconduct, or if the Participant is one of the individuals subject to automatic forfeiture under Section 304 of the Sarbanes-Oxley Act of 2002, the Participant shall reimburse the Company the amount of any payment in settlement of an Award earned or accrued during the twelve- (12-) month period following the first public issuance or filing with the United States Securities and Exchange Commission (whichever just occurred) of the financial document embodying such financial reporting requirement.

21.2    Legend. The certificates or statements of holdings for Shares may include any legend which the Committee deems appropriate to reflect any restrictions on transfer of such Shares.

21.3    Gender and Number. Except where otherwise indicated by the context, any masculine term used herein also shall include the feminine, the plural shall include the singular, and the singular shall include the plural.

21.4    Severability. In the event any provision of this Plan shall be held illegal or invalid for any reason, the illegality or invalidity shall not affect the remaining parts of this Plan, and this Plan shall be construed and enforced as if the illegal or invalid provision had not been included.

21.5    Requirements of Law. The granting of Awards and the issuance of Shares under this Plan shall be subject to all applicable laws, rules, and regulations, and to such approvals by any governmental agencies or national securities exchanges as may be required.

21.6    Delivery of Title. The Company shall have no obligation to issue or deliver evidence of title for Shares issued under this Plan prior to:

(a) Obtaining any approvals from governmental agencies that the Company determines are necessary or advisable; and

(b) Completion of any registration or other qualification of the Shares under any applicable national or foreign law or ruling of any governmental body that the Company determines to be necessary or advisable.

21.7    Inability to Obtain Authority. The inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company’s counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell such Shares as to which such requisite authority shall not have been obtained.

21.8    Investment Representations. The Committee may require any individual receiving Shares pursuant to an Award under this Plan to represent and warrant in writing that the individual is acquiring the Shares for investment and without any present intention to sell or distribute such Shares.

21.9    Uncertificated Shares. To the extent that this Plan provides for issuance of certificates to reflect the transfer or issuance of Shares, the transfer or issuance of such Shares may be effected on a noncertificated basis, to the extent not prohibited by applicable law or the rules of any stock exchange upon which the Shares are listed.

21.10    Unfunded Plan. Participants shall have no right, title, or interest whatsoever in or to any investments that the Company, and/or its Subsidiaries, and/or its Affiliates may make to aid it in meeting its obligations under this Plan. Nothing contained in this Plan, and no action taken pursuant to its provisions, shall create or be construed to create a trust of any kind, or a fiduciary relationship between the Company and any Participant, beneficiary, legal representative, or any other individual. To the extent that any individual acquires a right to receive payments from the Company, its Subsidiaries, and/or its Affiliates under this Plan, such right shall be no greater than the right of an unsecured general creditor of the Company, a Subsidiary, or an Affiliate, as the case may be. All payments to be made hereunder shall be paid from the general funds of the Company, a Subsidiary, or an Affiliate, as the case may be and no special or separate fund shall be established and no segregation of assets shall be made to assure payment of such amounts except as expressly set forth in this Plan.

21.11    No Fractional Shares. No fractional Shares shall be issued or delivered pursuant to this Plan or any Award. The Committee shall determine whether cash, Awards, or other property shall be issued or paid in lieu of fractional Shares or whether such fractional Shares or any rights thereto shall be forfeited or otherwise eliminated.

21.12    Retirement and Welfare Plans. Neither Awards made under this Plan nor Shares or cash paid pursuant to such Awards, except pursuant to a Covered Employee’s annual incentive award, may be included as “compensation” for purposes of computing the benefits payable to any Participant under

the Company’s or any Subsidiary’s or Affiliate’s retirement plans (both qualified and non-qualified) or welfare benefit plans unless such other plan expressly provides that such compensation shall be taken into account in computing a Participant’s benefit.

21.13    Deferred Compensation.If any Award would be considered deferred compensation as defined under Code Section 409A and would fail to meet the requirements of Code Section 409A, then such Award shall be null and void.

21.14    Nonexclusivity of this Plan. The adoption of this Plan shall not be construed as creating any limitations on the power of the Board or Committee to adopt such other compensation arrangements as it may deem desirable for any Participant.

21.15    No Constraint on Corporate Action. Nothing in this Plan shall be construed to: (i) limit, impair, or otherwise affect the Company’s or a Subsidiary’s or an Affiliate’s right or power to make adjustments, reclassifications, reorganizations, or changes of its capital or business structure, or to merge or consolidate, or dissolve, liquidate, sell, or transfer all or any part of its business or assets; or (ii) limit the right or power of the Company or a Subsidiary or an Affiliate to take any action which such entity deems to be necessary or appropriate.

21.16    Governing Law. The Plan and each Award Agreement shall be governed by the laws of the State of Missouri, excluding any conflicts or choice of law rule or principle that might otherwise refer construction or interpretation of this Plan to the substantive law of another jurisdiction. Unless otherwise provided in the Award Agreement, recipients of an Award under this Plan are deemed to submit to the exclusive jurisdiction and venue of the federal or state courts of Missouri, to resolve any and all issues that may arise out of or relate to this Plan or any related Award Agreement.

21.17    Indemnification.Subject to requirements and limitations of applicable law, each individual who is or shall have been a member of the Board, or a Committee appointed by the Board, or an officer of the Company, a Subsidiary, or an Affiliate to whom authority was delegated in accordance with Article 3, shall be indemnified and held harmless by the Company against and from any loss, cost, liability, or expense that may be imposed upon or reasonably incurred by him in connection with or resulting from any claim, action, suit, or proceeding to which he may be a party or in which he may be involved by reason of any action taken or failure to act under this Plan and against and from any and all amounts paid by him in settlement thereof, with the Company’s approval, or paid by him in satisfaction of any judgment in any such action, suit, or proceeding against him, provided he shall give the Company an opportunity, at its own expense, to handle and defend the same before he undertakes to handle and defend it on his own behalf, unless such loss, cost, liability, or expense is a result of his own willful misconduct or except as expressly provided by statute.

The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to which such individuals may be entitled under the Company’s Articles of Incorporation or Bylaws, as a matter of law, or otherwise, or any power that the Company may have to indemnify them or hold them harmless.

21.18    No Guarantee of Favorable Tax Treatment.Although the Company intends to administer the Plan so that Awards will be exempt from, or will comply with, the requirements of Code Section 409A, the Company does not warrant that any Award under the Plan will qualify for favorable tax treatment under Code Section 409A or any other provision of federal, state, local, or foreign law. The Company shall not be liable to any Participant for any tax, interest, or penalties the Participant might owe as a result of the grant, holding, vesting, exercise, or payment of any Award under the Plan.

21.19    Effect of Disposition of Facility or Operating Unit.In the event that the Company or any of its Affiliates and/or Subsidiaries closes or disposes of the facility at which a Participant is located

or the Company or any of its Affiliates and/or Subsidiaries diminish or eliminate ownership interests in any operating unit of the Company or any of its Affiliates and/or Subsidiaries so that such operating unit ceases to be majority owned by the Company or any of its Affiliates and/or Subsidiaries, then, with respect to Awards held by Participants who subsequent to such event will not be Employees, the Committee may, to the extent consistent with Code Section 409A (if applicable), (i) accelerate the exercisability of Awards to the extent not yet otherwise exercisable or remove any restrictions applicable to any Awards and (ii) extend the period during which Awards will be exercisable to a date subsequent to the date when such Awards would otherwise have expired by reason of the termination of such Participant’s employment with the Company or any of its Affiliates and/or Subsidiaries (but in no event to a date later than the expiration date of the Awards or the fifth anniversary of the transaction in which such facility closes or operating unit ceases). If the Committee takes no special action with respect to any disposition of a facility or an operating unit, then the terms and conditions of the Award Agreement and the other terms and conditions of this Plan shall control.

AMEREN CORPORATION  

P.O. BOX 66149, ST. LOUIS, MISSOURI 63166-6149

 PROXY

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
FOR THE

ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON MAY 2, 2006

APRIL 24, 2007

The undersigned hereby appoints GARY L. RAINWATER, WARNER L. BAXTER and STEVEN R. SULLIVAN, and any of them, each with the power of substitution, as proxy for the undersigned, to vote all shares of capital stock of Ameren Corporation represented hereby at the Annual Meeting of Shareholders to be held at The Saint Louis Art Museum in Forest Park, One Fine Arts Drive, St. Louis, Missouri, on May 2, 2006April 24, 2007 at 9:00 A.M.a.m., and at any adjournment thereof, upon all matters that may be submitted to a vote of shareholders including the matters described in the proxy statement furnished herewith, subject to any directions indicated on the reverse side of this proxy formcard and in their discretion on any other matter that may be submitted to a vote of shareholders.

NOMINEES FOR DIRECTOR -

SUSAN S. ELLIOTT, GAYLE P.W. JACKSON, JAMES C. JOHNSON, RICHARD A. LIDDY, GORDON R. LOHMAN, RICHARD A. LUMPKIN, CHARLES W. MUELLER, DOUGLAS R. OBERHELMAN, GARY L. RAINWATER, HARVEY SALIGMAN and PATRICK T. STOKES

This proxy card also provides voting instructions, if applicable, for shares held in the DRPIus Plan and the various employee stock purchase and benefit plans as described in the proxy statement.

Please vote, date and sign on the reverse sidehereof and return this proxy formcard promptly in the enclosed envelope. If you attend the meeting and wish to change your vote, you may do so automatically by casting your ballot at the meeting.

SEE REVERSE SIDE

AMEREN CORPORATION

ANNUAL MEETING OF SHAREHOLDERS

Tuesday, May 2, 2006

9:00 a.m. CST

The Saint Louis Art Museum in Forest Park

One Fine Arts Drive

St. Louis, MO 63110


LOGO

x

Please mark votes as in this example.This proxy will be voted as specified below. If no direction is made, this proxy will be voted FOR all nominees listed on the reverse side and as recommended by the Board on the other items listed below.

THE BOARD OF DIRECTORS RECOMMENDS VOTINGFORITEMS 1, 2 AND 3 ANDAGAINSTITEM 4.

ITEM 1FOR all nomineesWITHHOLDITEM 2FORAGAINSTABSTAINITEM 3FORAGAINSTABSTAIN
ELECTION OF DIRECTORS

(except as listed

below)

x

AUTHORITY

all nominees

x

ADOPTION OF THE 2006 OMNIBUS INCENTIVE COMPENSATION PLANxxxRATIFICATION OF APPOINTMENT OF INDEPENDENT AUDITORSxxx
FOR ALL EXCEPT: ___________________________________ITEM 4FORAGAINSTABSTAIN
SHAREHOLDER PROPOSAL REQUESTING EVALUATION OF 20-YEAR EXTENSION OF CALLAWAY PLANT LICENSExxxI PLAN TO ATTEND THE ANNUAL MEETINGx

SEE

REVERSE

SIDE

DATED ______________________, 2006

SIGNATURE(S) –

Shares registered in the name of a Custodian or Guardian must be signed by such. Executors, administrators, trustees, etc. should so indicate when signing.

 

Ù Detach here from proxy voting cardÙ

PROXY VOTING INSTRUCTIONS

VOTE BY TELEPHONE

Call toll-free using a

touch-tone phone

1-877-326-3736

OR

VOTE BY INTERNET

Log on at:

http://www.ameren.com

Click on the “Vote Your Proxy

On-Line” link

OR

VOTE BY MAIL

Return your proxy in the

postage-paid envelope

provided

Please have your proxy card available when you vote

by telephone or when you vote by Internet

*Please follow the prompts that will be presented to you to cast your vote.

*Cast your vote at anytime, 24 hours a day. However, your telephone or Internet vote must be received by 11:59 p.m. (Central Time) on April 30, 2006 to be counted in the final tabulation.

*If you vote by telephone or by Internet, please do not send your proxy card by mail.

We encourage you to take advantage of voting by telephone or Internet.

These are convenient cost saving ways to vote your shares.

Ú Fold and detach hereÚ

LOGOANNUAL MEETING OF SHAREHOLDERS
ADMISSION TICKET
(SEE REVERSE SIDE)