[AMEREN LOGO]



NOTICE OF ANNUAL MEETING OF
STOCKHOLDERS AND PROXY STATEMENT OF
AMEREN CORPORATION



      Time:     9:00 A.M.
                Tuesday
                April 25, 200024, 2001


      Place:    Powell Symphony Hall
                718 North Grand Boulevard
                St. Louis, Missouri




IMPORTANT

      Admission to the meeting  will be by ticket  only.  If you plan to attend,
please  checkadvise the Company in your proxy vote (by  telephone  or by checking the
appropriate box on the proxy.proxy card).  Persons without tickets will be admitted to
the meeting upon verification of their stockholdings in the Company.





      Please vote date, sign, and returnby proxy (via  telephone or the  enclosed  proxy in the accompanying
reply envelopecard) 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 STOCKHOLDERS

To the Stockholders of

        AMEREN CORPORATION


      We will hold the Annual Meeting of Stockholders  of Ameren  Corporation at
Powell  Symphony  Hall,  718 North Grand  Boulevard,  St.  Louis,  Missouri,  on
Tuesday, April 25, 2000,24, 2001, at 9:00 A.M., for the purposes of

      (1)electing directorsDirectors of the Company for terms ending in April 2001;2002;

      (2)considering a stockholder proposal relating to releases from the
         Callaway Plant; (3)considering a stockholder proposal relating to cumulative voting; and

      (4)(3)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, 2000,8, 2001, you are entitled to vote at the meeting and at any adjournment
thereof. To assureAll shareowners are requested to be present at the meeting in person or
by proxy so that your shares are  represented  at this meeting,  pleasea quorum may be assured.

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

By order of the Chairman and the Board of Directors.


                                    STEVEN R. SULLIVAN
                                    Secretary

St. Louis, Missouri
March 16, 200015, 2001




PROXY STATEMENT OF AMEREN CORPORATION
(First sent or given to stockholders March 16, 2000)15, 2001)

Principal Executive Offices:
One Ameren Plaza
1901 Chouteau Avenue, St. Louis, MO 63103

      The  enclosed  proxyThis  solicitation  of proxies is solicitedmade by the Board of Directors of Ameren
Corporation  (the "Company" or "Ameren") for use at the Annual Meeting of  Stockholders
of the Company to be held on Tuesday,  April 25, 2000,24,  2001,  and at any  adjournment
thereof.

      As a result of a merger  effective  December 31, 1997 (the "Merger"),  the
Company is a holding company, the principal first tier subsidiaries of which are
Union Electric  Company,  d/b/a AmerenUE  ("Union  Electric"),  Central Illinois
Public Service  Company,  d/b/a  AmerenCIPS  ("CIPS"),  and Ameren Services  Company.Company
("Ameren Services"),  AmerenEnergy  Resources Company ("AER"), and AmerenEnergy,
Inc.


                                     VOTING

Who Can Vote

      The  accompanying  proxy  card  represents  all shares  registered  in the
name(s)  shown  thereon,   including   shares  in  the  Company's  DRPlus  Plan.
Participants in the Ameren  Corporation  Savings  Investment  Plans will receive
separate proxies for shares in such plans.

      Only  stockholders  of record at the close of business on the Record Date,
March 6, 2000,8, 2001, are entitled to vote at the meeting. The voting securities of the
Company on such date consisted of 137,215,462  shares of Common Stock.  In order
to conduct the meeting,  a majorityholders of more than one-half of the outstanding shares
entitled to vote
must be represented.

     A proxy can be revoked by delivering either a written revocation or a
signed proxy  bearing a later date to the  Secretary of the Company or by votingpresent in person at the meeting.

     Returned  proxies  which are  properly  marked and signed  will be voted as
directed.  Ifor represented by proxy so that there is a quorum.  It
is important  that you sign the proxy but do not make specific  choices,vote promptly so that your shares will be  voted  as  recommended  byare counted  toward the
Board - FOR the  Board's  nominees  for
Director;  AGAINST Item 2; and AGAINST Item 3. On any other  matters,  the named
proxies will use their discretion.quorum.

      In  determining  whether  a  quorum  is  present  at the  meeting,  shares
registered  in the name of a broker  or other  nominee,  which  are voted on any
matter,  will be  included.  In  tabulating  the number of votes cast,  -1-

withheld
votes, abstentions, and non-votes by banks and brokers are not included.

      The Board of  Directors  has  adopted a  confidential  voting  policy  for
proxies.
                                      -1-


How You Can Vote

      By Proxy.  Before the  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; or

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

      The telephone voting procedure is designed to confirm your identity and to
allow you to give your voting  instructions.  If you wish to vote by  telephone,
please follow the enclosed instructions.

      If you mail us your  properly  completed and signed proxy card, or vote by
telephone,  your shares of the Company's 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 and AGAINST Item 2. On any other matters,  the
named proxies will use their discretion.

      In Person.  You may come to the  meeting  and cast your vote  there.  Only
stockholders  of record at the close of  business on the Record  Date,  March 8,
2001, are entitled to vote at the 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  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
meeting.


                             ITEMS TO BE CONSIDERED

Item (1):  Election of Directors

      Fourteen  directors  are to be elected at the meeting,  to serve until the
next annual meeting of stockholders  and until their  successors are elected and
qualified.  The nominees  designated  by the Board of Directors are listed below
with information about their principal occupations and backgrounds.

                                      -2-




WILLIAM E. CORNELIUS

Retired Chairman of the Board of Directors and Chief Executive Officer of Union
Electric.  Mr. Cornelius joined Union Electric in 1962, held several management
positions, and became President in 1980. In 1988 he was elected Chairman of the
Board and served in that capacity until his retirement in 1994. He is a member
of the Executive and Contributions Committees of the Board of Directors.
Director of the Company since 1997. Other directorships:
GenAmerica Financial Corporation.  Age: 68.69.

CLIFFORD L. GREENWALT

Retired Vice Chairman of the Company and retired  President and Chief  Executive
Officer of CIPSCO  Incorporated and CIPS. Mr. Greenwalt joined CIPS in 1963, was
elected a senior vice  president  in 1980,  and was named  President  and CEO in
1989. Mr. Greenwalt is a member of the Executive and Contributions Committees of
the Board. Director of the Company since 1997. Other  directorships:  National
City  Corporation and its subsidiary,  National City Bank of  Michigan/Illinois.
Age: 67.68.

THOMAS A. HAYS

Retired  Deputy  Chairman of The May  Department  Stores  Company,  a nationwide
retailing organization.  Mr. Hays joined the May organization in 1969. He served
as Vice  Chairman  from 1982 to 1985 and  President  from 1985 to 1993,  when he
became Deputy  Chairman.  He is a member of the  Executive  and Human  Resources
Committees   of  the  Board.   Director  of  -2-

the  Company   since  1997.   Other
directorships: Leggett & Platt Incorporated; Payless Shoe Source, Inc. Age: 67.68.

THOMAS H. JACOBSEN

Former Chairman of the Board, Firstar  Corporation,  a bank holding company. Mr.
Jacobsen was elected Chief Executive Officer of Mercantile  Bancorporation Inc.,
a bank holding company,  in 1989 and became Chairman of Firstar Corporation upon
Mercantile's  merger with Firstar in 1999. He was elected to  directorship  with
U.S.  Bancorporation  upon its  merger  with  Firstar  in 2001.  Adviser  to the
Company's  Board since 1997. A first-time  nominee as Director of the  Company's
Board. Other  directorships:  U.S.  Bancorporation;  Federal Reserve Bank of St.
Louis; Trans World Airlines. Age: 61.

                                      -3-



RICHARD A. LIDDY

Chairman President,  and Chief  Executive  Officer of GenAmerica  Financial  Corporation,  which  provides  life,  health,
pension,  annuity and related insurance products and services.  Mr. Liddy joined
GenAmerica  Corporation as President and Chief  Operating  Officer in 1988 and was elected to
his present position in 1995. Mr. Liddy is a member of the Auditing Committee of
the Board.  Director of the Company since 1997. Other directorships:  Brown GroupShoe
Company,  Inc.; Ralston Purina Company;  certain subsidiariesEnergizer Holdings,  Inc.;  Reinsurance
Group of GenAmerica Corporation.America. Age: 64.65.

GORDON R. LOHMAN

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. Mr. Lohman
is a member of the  Executive  and Human  Resources  Committees  of the Board of
Directors.  Director of the Company  since 1997.  Other  directorships:  Fortune
Brands, Inc. Age: 65.66.

RICHARD A. LUMPKIN

Chairman,  President  and  Chief  Executive  Officer  of  Illinois  Consolidated
Telephone Company,  Mattoon,  Illinois,  Vice Chairman of McLeodUSA Inc.Incorporated
and Chairman of Illuminet  Holdings,  Inc. Mr. Lumpkin was elected  Treasurer of
Illinois  Consolidated  Telephone  Company in 1968, and  President in 1977,  and was
named to his present  position in 1990. As thea result of a September  1997 merger,
he also serves as Vice  Chairman of  McLeodUSA.  He is a member of the  Auditing
Committee of the Board. Director of the Company since 1997. Other directorships:
McLeodUSA; First Mid-Illinois Bancshares, Inc.; First Mid-Illinois Bank & Trust;
Illuminet Holdings, Inc. Age: 65.66.

JOHN PETERS MacCARTHY

Retired Chairman and Chief Executive  Officer of Boatmen's Trust Company,  which
conducted a general trust  business.  Prior to being elected to such position in
1988, he served as President and Chief Executive  Officer of Centerre Bank, N.A.
He is Chairman of the Human Resources and Nominating Committees of the Board and
is a member of the  Executive  Committee.  Director of the  Company  since 1997.
Other directorships: Brown Shoe Company.Company, Inc. Age: 66.

                                      -3-67.

                                      -4-



HANNE M. MERRIMAN

Principal  in Hanne  Merriman  Associates,  Washington,  D.C.,  retail  business
consultants.  Ms.  Merriman  is a member  of the  Contributions  and  Nominating
Committees   of  the  Board.   Director  of  the  Company   since  1997.   Other
directorships: Ann Taylor Stores Corporation; US Airways Group, Inc.; State Farm
Mutual Automobile  Insurance Co.; The Rouse Company; T. Rowe Price Mutual Funds;
Finlay Enterprises, Inc. Age: 58.59.

PAUL L. MILLER, JR.

President and Chief Executive Officer of P. L. Miller & Associates, a management
consultant  firm which  specializes  in  strategic  and  financial  planning for
privately held companies and distressed businesses and in international business
development.  He is also a principal in a financial  advisory  firm for small to
middle market companies.  Mr. Miller has served as president of an international
subsidiary of an investment banking firm, and for over 20 years was president of
consumer product  manufacturing  and  distribution  firms. He is a member of the
Auditing Committee of the Board. Director of the Company since 1997. Age: 57.58.

CHARLES W. MUELLER

Chairman, President and Chief Executive Officer of the Company and President and
Chief Executive Officer of Union Electric and Ameren Services  Company.Services. Mr. Mueller began
his career with Union Electric in 1961 as an engineer. He was named Treasurer in
1978,  Vice  President-Finance  in 1983,  Senior  Vice  President-Administrative
Services in 1988;  President in 1993 and Chief  Executive  Officer in 1994.  Mr.
Mueller was elected  Chairman of Ameren and Ameren Services Company  upon the Merger.  He
is a member of the Executive and Contributions Committees of the Board. Director
of the Company since 1997. Mr.  Mueller is Deputy Chairman of the Federal  Reserve Bank
of St. Louis.  Other  directorships:  Union Electric  (since 1993);  CIPS (since
1997); Angelica Corporation. Age: 61.

ROBERT H. QUENON

Retired Chairman of Peabody Holding  Company,  Inc., which is engaged in mining,
marketing and transportation of coal. Mr. Quenon was elected President and Chief
Executive  Officer  of  Peabody  Coal in 1978.  From  1983 to 1990 he  served as
President  and Chief  Executive  Officer of Peabody  Holding and was Chairman of
that firm from 1990 until his retirement in August 1991. Mr. Quenon was Chairman
of the Federal  Reserve Bank of St.  Louis from 1993 to 1995.  He is a member of
the Human  Resources and  Nominating  Committees  of the Board.  Director of the

                                      -4-




Company since 1997. Other  directorships:  Newmont Mining  Corporation;  Laclede
Steel Company. Age: 71.62.

HARVEY SALIGMAN

Retired   Managing

Partner of Cynwyd Investments,  a family real estate  partnership.  Mr. Saligman
also served in various  executive  capacities in the consumer  products industry
for more than 25 years.  He is Chairman of the Auditing  Committee of the Board.
Director of the Company since 1997. Age: 61.62.

                                      -5-



JANET McAFEE WEAKLEY

PresidentChairman of Janet McAfee  Inc.,  a  residential  real estate  company  which she
founded in 1975.  She is a member of the  Auditing,  Executive,  and  Nominating
Committees and is Chairman of the Contributions Committee of the Board. Director
of the Company since 1997. Other directorships: Barnes-Jewish Hospital. Age: 70.71.

JAMES W. WOGSLAND

Retired Vice Chairman of Caterpillar,  Inc. Mr.  Wogsland was elected  Executive
Vice  President and director of  Caterpillar in 1987. He served as Vice Chairman
and director from 1990 until his retirement in 1995. Mr. Wogsland is a member of
the Auditing  Committee of the Board.  Director of the Company since 1997.  Age:
68.69.
      The  fourteen  nominees  for  directorDirector  who receive the most votes will be
elected.

      The Board of Directors knows of no reason why any nominee will not be able
to serve as a director.Director.  If, at the time of the Annual  Meeting,  any nominee is
unable or declines to serve,  the proxies may be voted for a substitute  nominee
approved by the Board.

      During 1999,2000, the Board of Directors met six times. Except for Mr. Liddy,Jacobsen
who is a first-time nominee,  all nominees attended at least 75%78% of the meetings
of the Board and the Board Committees of which they were members,  and aggregate
attendance of the nominees as a group exceeded 90%93%.

      Age  Policy -  Directors  who attain age 72 prior to the date of an annual
meeting cannot be designated as a nominee for election at such meeting. Director
Robert H. Quenon is completing his Board service at the Annual Meeting  pursuant
to this age policy. In addition, the eligibility of former employees, except for
one who has been elected Chief  Executive  OfficeOfficer of Ameren,  Union Electric or
CIPS, is limited to the date upon which they retire,  resign or otherwise  sever
active employment with the respective company.

                                      -5-



      Board  Committees  -  The  Board  of  Directors  has  standing   Auditing,
Contributions, Executive, Human Resources and Nominating Committees, the members
of which are identified in the biographies above. The Auditing,  Human Resources
and Nominating  Committees are comprised entirely of outside directors.  Each of
the members of the Auditing  Committee is independent as defined by the New York
Stock Exchange listing standards.

                                      -6-


      The general functions of the Auditing  Committee  include:  (1) reviewing,
with management and the independent  accountants,  the adequacy of the Company's
system of internal accounting  controls;  (2) reviewing the scope and results of
the  annual   examination  and  other  services  performed  by  the  independent
accountants; (3) reviewing, with management and the independent accountants, the
Company's annual audited financial  statements and recommending to the Board the
inclusion of such  financial  statements in the  Company's  Annual Report on SEC
Form  10-K;  (4)  recommending  to the  Board  the  appointment  of  independent
accountants and approving fees for the services they perform;  and (4)(5) reviewing
the  scope  of  audits  and  annual  budget  of  the  Company's  internal  audit
department.  The  Board of  Directors  has  adopted a  written  charter  for the
Auditing  Committee,  which is included as an appendix to this proxy  statement.
The Auditing Committee held three meetings in 1999.2000.

      The  Contributions  Committee  makes  policies  and  recommendations  with
respect to charitable and other contributions.  The Contributions Committee held
one
meetingthree meetings in 1999.2000.

      The  Executive  Committee  has such duties as may be  delegated to it from
time to time by the Board. The Executive Committee did not meet in 1999.2000.

      The Human Resources  Committee  considers the  qualifications of executive
personnel  and  recommends  changes  therein,  considers  or  recommends  salary
adjustments  for certain  employees and  considers and acts on important  policy
matters affecting  Company  personnel.  The Human Resources  Committee held fivefour
meetings in 1999.2000.

      The  Nominating  Committee  considers and  recommends  for Board  approval
candidates  for the Board of Directors,  as  recommended  by  management,  other
members of the Board,  stockholders and other interested parties. The Nominating
Committee held one meeting in 1999.2000.

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

      Each  directorDirector  who is not an employee  of the Company  receives an annual
retainer of $20,000, an annual award of 400 shares of the Company's Common Stock
(increased  from 300 shares  effective  January 1, 2000) and a fee of $1,000 for each Board  meeting  and each  Board  Committee  meeting
attended.

      -6-

An optional  deferred  compensation  plan  available to directorsDirectors  permits
non-employee directorsDirectors to defer all or part of their annual

                                      -7-


retainer and meeting fees.  Deferred  amounts,  plus an interest  factor,  are
used to provide payout distributions  following completion of Board service and
certain death benefits. 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.

Item (2):  Stockholder Proposal Relating to Releases from the Callaway Plant

   Proponents  of the  stockholder  proposal  described  below  notified  the
Company of their  intention  to attend the 20002001  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 oral or written request for such information.

WHEREAS:  Nuclear power plants,  including  Callaway,  during routine operation,
release into the air and water radioactive  wastes which 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,  and some
      of that water becomes radioactively contaminated;
Some  wastewater streams  contaminated with concentrations of radioactivity that
      exceed  permissible  federal release standards are placed in storage tanks
      until  some of the  shorter-lived  isotopes  can  decay;  some  wastewater
      streams are  re-filtered  before being recycled  (within the plant) or are
      released to the river;  some  wastewater  streams  are merely  pumped into
      other waste  processing  tanks to be diluted  with  cleaner  water  before
      discharge  to the river.  Instruments  monitoring  the flow of  wastewater
      batches after  discharge are set only to detect  gamma-emitting  isotopes;
      some beta emitters  (including tritium and noble gases) and alpha emitters
      can be  released  without  detection.  Unfiltered,  accidental  leaks  and
      releases can also occur through the established liquid effluent pathways;
One   contaminant - tritium, a radioactive  isotope of hydrogen - accumulates in
      the cooling water as a fission and activation product;
Since no economically  feasible technology exists to filter tritium from cooling
      water effluents, it is released in gaseous emissions to the -7-

atmosphere and
      in liquid  releases into the Missouri  River - 79 miles  upstream from St.
      Louis County's drinking water intake;
                                      -8-



The medical profession typically decontaminates a lab table for spills of even
      90  trillionths  (per  four-inch  square)  of one curie of  radioactivity.
      During  Callaway's  operation  in 1998,1999,  the  Company  reported  releasing
      1,394.11,480.8  curies  of  tritium  in  238267  batches  of  filtered   radioactive
      wastewater  into the Missouri River.  The company also reported  releasing
      tritium to the atmosphere.atmosphere;
Tritium  can be  ingested  or  inhaled,  potentially  causing  reproductive,
      cellular,  and  genetic  damage.  Its
      half-life is 12.3 years;
Because tritium  and the other  radioactive  isotopes  routinely  released  from
      Callaway will continue emitting radiation  particles and rays for at least
      ten  half-lives,  the impacts of the Callaway  liquid wastes on the water,
      algae, fish and other creatures  (including humans) living downwind can be
      persistent.

RESOLVED:  shareholders request that Ameren describe, in its next annual report,
its efforts to reduce the release of radioactive  materials to the air and water
during Callaway's routine operation.

SUPPORTING STATEMENT

Radioactive releases occur during Callaway's routine operation.  We believe that
the  impact of these  planned  radiation  releases,  no  matter  how  small,  is
cumulative,  irreversible, and potentially dangerous. In addition, the threat of
disastrous accidental releases remains.  Ameren should take responsibility for a
more complete accounting of all radiation releases,  so that the Company and its
shareholders can more accurately assess the plant's impact on the biosphere.


YOUR BOARD OF DIRECTORS RECOMMENDS A VOTE AGAINST ITEM (2).

      On-going  measurements at Callaway  consistently  show that plant effluent
releases are less than oneten percent of the levels allowed by current regulations.
This  low  level  of  effluent  releases  clearly   demonstrates  the  Company's
successful  commitment to reduce the level of radioactive material released from
the Callaway Plant.  Because  effluent  releases at Callaway are already a small
fraction of allowable  standards,  additional  reporting or  expenditures by the
Company would have minimal  impact,  and the Board  therefore  recommends a vote
AGAINST ITEM (2).

      Passage of the proposal requires the affirmative vote of a majority of the
votes cast.

                                      -8--9-



Item (3):  Stockholder Proposal Relating to Cumulative Voting

     The proponent of the  stockholder  proposal  described  below  notified the
Company of its  intention  to attend  the 2000  Annual  Meeting  to present  the
proposal for consideration and action. The name and address of the proponent and
the number of shares it holds will be furnished by the  Secretary of the Company
upon receipt of any oral or written request for such information.

     BE  IT  RESOLVED:  That  the  stockholders  of  Ameren  Corp.  ("Company"),
assembled  in annual  meeting in person and by proxy,  hereby  request  that the
Board of Directors take the steps necessary to provide for Cumulative  Voting in
the election of directors,  which means each stockholder shall be entitled to as
many votes as shall equal the number of shares he or she owns, multiplied by the
number of directors to be elected,  and he or she may cast all of such votes for
a single candidate, or any two or more candidates as he or she may see fit.

SUPPORTING STATEMENT

     Cumulative  voting is one of the few ways stockholders can attempt to elect
members who they believe represent their views.

     Cumulative voting maximizes a stockholder's voting power by allowing him or
her to concentrate  votes for a single  nominee or combination of nominees.  For
example,  Ameren Corp. has a De-classified  Board, which means that all fourteen
directors are stand for election at the same time.  Without  Cumulative  Voting,
the owners of 14.3% of the  company's  stock do not have a  realistic  chance of
electing  a  director.  They  would  only be able to cast  their  14.3% for each
nominee.  However,  with  Cumulative  Voting,  those  same  owners  would have a
realistic  chance  to elect a nominee  by  lumping  all of their  votes for that
nominee.

     Even if dissident  stockholders do not have enough votes to elect nominees,
cumulative  voting  ensures that  management  and the Board will consider  their
views.

We urge you to vote FOR this proposal.


YOUR BOARD OF DIRECTORS RECOMMENDS A VOTE AGAINST ITEM (3).

                                      -9-




     The Board believes that the adoption of cumulative  voting would reduce the
effectiveness  of Ameren's  Board of Directors and would be  detrimental  to the
best interest of the Company and its shareholders.  The Company's directors have
always been chosen for their accomplishment, commitment, integrity and diversity
of background  and  experience  and share the common  objective of advancing the
best  interests  of all  shareholders,  not a special  interest or a  particular
constituency.

     Cumulative  voting has the  appearance  of fairness,  but in reality  would
benefit special interest groups. Cumulative voting could permit a shareholder or
group of shareholders  owning  substantially less than a majority of a company's
stock to elect a director  to  advance a group's  narrow  interests.  This could
alter the  proper  balance,  diversity  and  independence  of the  Board,  would
introduce the likelihood of factionalism  and discord within the Board,  and may
undermine its ability to work  effectively  on behalf of the interests of all of
the shareholders.

     Factionalism and discord within the Board would inhibit its discussions and
decision-making,   shifting  the  Board's  attention  away  from  the  Company's
strategic  plans to the director's  single  interest  agenda.  The proponent has
given no  reason,  and the Board of  Directors  knows of none,  why the  present
method of voting should not continue to work as successfully in the future as it
has in the past. Accordingly, the Board recommends a vote AGAINST ITEM (3).

     Passage of the proposal  requires the affirmative vote of a majority of the
votes cast.

Item (4):  Other Matters

      The  Board  of  Directors  does  not know of any  matter,  other  than the
election of directorsDirectors  and the proposalsproposal set forth above,  which may be presented
to the meeting.


                               SECURITY OWNERSHIP

      Based on an  Amendment  to  Schedule  13G filed  with the  Securities  and
Exchange  Commission  on February 10,  2000,12,  2001,  Capital  Research  and  Management
Company,  333  South  Hope  Street,  Los  Angeles,  California  90071,  had sole
dispositive  power over  11,382,8007,137,800  shares of the Company's  Common Stock and no
voting  power with  respect to any such  shares.  Pursuant to Rule  13d-4,  such
Company  disclaimed  beneficial  ownership of the reported shares.  The reported
shares  represent  approximately  8.3%5.2% of the  outstanding  Common  Stock of the
Company.

                                      -10-



                        SECURITY OWNERSHIP OF MANAGEMENT
Shares of Common Stock of the Company Beneficially Owned Name as of February 1, 2000 ---- ------------------------2001 Paul A. Agathen 15,04332,980 Donald E. Brandt 14,58033,222 William E. Cornelius 11,68812,236 Clifford L. Greenwalt 15,90617,083 Thomas A. Hays 9,73810,355 Thomas H. Jacobsen 7,282 Richard A. Liddy 3,1363,852 Gordon R. Lohman 1,2691,742 Richard A. Lumpkin 3,2703,955 John Peters MacCarthy 9,63810,255 Hanne M. Merriman 3,1653,784 Paul L. Miller, Jr. 2,7753,367 Charles W. Mueller 45,05495,541 Robert H. Quenon 3,682 4,337 Gary L. Rainwater 4,41619,451 Garry L. Randolph 7,34614,659 Harvey Saligman 3,6384,255 Janet McAfee Weakley 4,2824,875 James W. Wogsland 2,0932,566 All Directors, nominees for Director and executive officers as a group 264,453 489,884 -10- Includes shares held jointly. Also includes shares issuable within 60 days upon the exercise of stock options as follows: Mr. Agathen, 10,575;28,175; Mr. Brandt, 13,200;31,675; Mr. Mueller, 36,175;84,950; Mr. Rainwater, 13,425; and Mr. Randolph, 5,150.12,250. Reported shares include those for which a director,Director, nominee for directorDirector 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 nominee or executive officer does not claim beneficial ownership. Shares beneficially owned by all directors,Directors, nominees for directorDirector and executive officers in the aggregate do not exceed one percent of any class of equity securities outstanding. Director Quenon is completing his Board service at the Annual Meeting. 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 a Vice President of certain Company subsidiaries.
EXECUTIVE COMPENSATION Ameren Corporation Human Resources Committee Report on Executive Compensation Ameren Corporation and its subsidiaries' (collectively referred to as "Ameren") goal for executive compensation is to approximate the median of the range of compensation paid by similar companies. Accordingly, the Human Resources Committee of the Board of Directors of Ameren -11- Corporation, which is comprised entirely of non-employee directors,Directors, makes annual reviews of the compensation paid to the executive officers of Ameren. The Committee's compensation decisions with respect to the five highest paid officers of Ameren Corporation and its principal subsidiaries are subject to approval by such company's Board of Directors. Following the annual reviews, the Committee authorizes appropriate changes as determined by the three basic components of the executive compensation program, which are: o Base salary, o A performance-based short-term incentive plan, and o Long-term stock-based awards. First, in evaluating and setting base salaries for executive officers, including the Chief Executive Officers of Ameren Corporation and its subsidiaries, the Committee considers: individual responsibilities, including changes which may have occurred since the prior review; -11- individual performance in fulfilling responsibilities, including the degree of competence and initiative exhibited; relative contribution to the results of operations; the impact of operating conditions; the effect of economic changes on salary structure; and comparisons with compensation paid by similar companies. Such considerations are subjective, and specific measures are not used in the review process. The second component of the executive compensation program is a performance-based Executive Incentive Compensation Plan established by the Ameren Corporation Board, which provides specific, direct relationships between corporate results and Plan compensation. For 1999,2000, Ameren consolidated year-end earnings per share (EPS) target levels were set by the Human Resources Committee. If EPS reaches at least the minimum target level, the Committee authorizes incentive payments within prescribed ranges based on individual performance and degree of responsibility. If EPS fails to reach the minimum target level, no payments are made. Under the Plan, it is expected that payments to the Chief Executive Officers of Ameren Corporation and its subsidiaries will range from 0-37% of base salary. For 1999,2000, actual payments ranged from 28.5%28.8% to 35.5%35.6% of base salary. The third component of the 19992000 executive compensation program is the Long-Term Incentive Plan of 1998, which also ties compensation to performance. The 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 -12- in the 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 Plan. Awards under the 1998 Plan have been at levels that approximate the median of the range of awards granted by similar companies. In determining the reported 19992000 compensation of the Chief Executive Officers, as well as compensation for the other executive officers, the Human Resources Committee considered and applied the factors discussed above. Further, the reported compensation reflects an above-average level of achievement in attaining 19992000 EPS. Authorized compensation for the Company's executive officers fell within the ranges of those paid by similar companies. /s/ John Peters MacCarthy, Chairman /s/ Thomas A. Hays /s/ Gordon R. Lohman /s/ Robert H. Quenon -12- Compensation Tables The following tables contain compensation information, for the periods indicated, for (a) the Chairman, President and Chief Executive Officer of the Company and (b) the four other most highly compensated executive officers of the Company who were serving as executive officers at the end of 1999. -13- 2000. SUMMARY COMPENSATION TABLE
Long-Term Compensation Annual CompensationSecurities All Other Name and Compensation Securities All Other ------------ Underlying Compen- ------------ Principal Position Year Salary($) Bonus($) Options(#) sation($) - --------------------- ---- --------- -------- ---------- --------- C. W. Mueller 2000 660,000 235,200 108,100 79,421 Chairman of Ameren; 1999 580,000 206,000 75,300 45,850 Chairman of Ameren;President and Chief 1998 550,000 198,000 63,800 53,751 President and 1997 500,000 155,000 23,000 45,723 Chief Executive Officer, Ameren, Union Electric and Ameren Services Company G. L. Rainwater 2000 400,000 115,200 32,600 9,450 President and Chief 1999 342,000 97,500 27,900 4,825 President and ChiefExecutive Officer,CIPS; 1998 325,000 93,000 25,800 66 Executive Officer, CIPS 1997 246,000 - - 134President, AER D. E. Brandt 2000 342,000 82,100 32,600 47,117 Senior Vice President, 1999 292,000 78,800 27,900 35,781 Senior Vice President,Ameren, Union Electric 1998 274,000 79,000 25,800 31,947 Ameren, Union Electric 1997 254,000 64,000 7,800 27,580 and Ameren Services CompanyG. L. Randolph 2000 276,000 78,700 14,100 11,729 Senior Vice President, 1999 236,000 47,800 10,700 6,833 Union Electric 1998 220,000 47,000 9,700 6,294 P. A. Agathen 2000 272,000 71,800 32,600 27,408 Senior Vice 1999 242,000 65,300 27,900 22,435 Senior VicePresident, Ameren 1998 230,000 63,000 25,800 19,644 President, Ameren 1997 215,000 51,000 7,800 18,045 Services Company G. L. Randolph 1999 236,000 47,800 10,700 6,833 Vice President, 1998 220,000 47,000 9,700 6,294 Union Electric 1997 192,000 38,000 3,400 5,953 Includes compensation received as an officer of Ameren and its subsidiaries. Amounts includeAmount includes (a) matching contributions to the 401(k) plan and (b) above-market earnings on deferred compensation, as follows: (a) (b) C. W. Mueller $4,800 $41,050$7,740 $71,681 G. L. Rainwater 3,952 8735,100 4,350 D. E. Brandt 5,313 30,4687,703 39,414 G. L. Randolph 7,654 4,075 P. A. Agathen 4,605 17,830 G. L. Randolph 5,706 1,1275,950 21,458
-14--13- OPTION GRANTS IN 19992000
Number of % of Total Grant Shares Options Date Underlying Granted to Exercise Present Options Employees Price Expiration Value Name Granted in 19992000 ($/Sh) Date ($) ---- ---------- ------- ------ ---- --- C. W. Mueller 75,300 9.8 36.625108,100 11.29 31.00 2/12/09 354,66311/10 448,615 G. L. Rainwater 27,900 3.63 36.62532,600 3.41 31.00 2/12/09 131,40911/10 135,290 D. E. Brandt 27,900 3.63 36.62532,600 3.41 31.00 2/12/09 131,40911/10 135,290 G. L. Randolph 14,100 1.47 31.00 2/11/10 58,515 P. A. Agathen 27,900 3.63 36.62532,600 3.41 31.00 2/12/09 131,409 G. L. Randolph 10,700 1.39 36.625 2/12/09 50,39711/10 135,290 Options relate to Ameren Common Stock and vest 25% annually beginning February 12, 2001.11, 2002. Options are not transferable. The Grant Date Present Values were determined using the binomial option pricing model, a derivative of the Black-Scholes option pricing model. Assumptions used for the model are as follows: an option term of ten years, stock volatility of 18.80%17.39%, a dividend yield of 6.51%6.61%, risk-free interest rate of 5.44%6.81%, and a vesting restrictions discount rate of 3% per year over the five-year vesting period. The Grant Date Present Value calculation is presented in accordance with SEC proxy requirements, and the Company has no way to determine whether the pricing model can properly determine the value of an option. There is no assurance that the value, if any, that may be realized will be at or near the value estimated by the model. No value will be realized by the optionee unless the stock price increases from the exercise price, in which case shareholders would benefit commensurately.
AGGREGATED OPTION EXERCISES IN 19992000 AND YEAR-END VALUES
Value of Shares Unexercised In-the-Money Acquired Value Options Options on Realized at Year End(#) at Year End($) Name Exercise $ Exercisable Unexercisable Exercisable Unexercisable ---- -------- --------------------- ----------- ------------- ----------- ------------- C. W. Mueller - - 25,925 169,715 - -55,875 247,325 404,198 2,828,364 G. L. Rainwater - - - 53,700 - -6,450 79,850 45,553 906,128 D. E. Brandt - - 9,550 64,35021,050 85,450 151,366 942,228 G. L. Randolph - - 8,100 34,400 58,538 386,294 P. A. Agathen - - 6,925 63,475 - - G. L. Randolph - - 3,675 24,725 - -17,550 85,450 114,834 942,228 These columns represent the excess of the closing price of the Company's Common Stock of $46.3125 per share, as of December 29, 2000, above the exercise price of the options. The amounts under the Exercisable column report the "value" of options that are vested and therefore could be exercised. The Unexercisable column reports the "value" of options that are not vested and therefore could not be exercised as of December 31, 2000.
-15--14- Ameren Retirement Plan Most salaried employees of Ameren and its subsidiaries earn benefits under the Ameren 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 equals base pay, overtime and annual bonuses, which are equivalent to amounts shown as "Annual Compensation" 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, 1998.1998).
Participant's Age Regular Credit for Transition Credit on December 31 Pensionable Earnings 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% 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 BondsBills for the previous October, plus 1%. 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. When a participant terminates employment, 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. Benefits are not subject to any deduction for Social Security or other offset amounts. -16--15- 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 Plan is maintained by Ameren to provide for a supplemental benefit equal to the difference between the benefit that would have been paid if such Code limitations were not in effect and the reduced benefit payable as a result of such Code limitations. The plan 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, which would be payable to each executive officer listed if he were to retire at age 65 at his 19992000 base salary and annual bonus, and payments were made in the form of a single life annuity.
Name Year of 65th Birthday Estimated Annual Benefit ---- --------------------- ------------------------ C. W. Mueller 2003 $430,000$383,000 G. L. Rainwater 2011 203,000192,000 D. E. Brandt 2019 273,000264,000 G. L. Randolph 2013 180,000 P. A. Agathen 2012 99,000 G. L. Randolph 2013 192,00094,000
Change of Control Severance Plan Under the Ameren Corporation Change of Control Severance Plan, designated officers of Ameren and its subsidiaries, including current officers of the Company named in the Summary Compensation Table, are entitled to receive severance benefits if their employment is terminated under certain circumstances within three years after a "change of control". A "change of control" occurs, in general, if (i) any individual, entity or group acquires 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, as of the effective date of the Plan, constitute the Board of Directors of Ameren, or who have been approved by a majority of the Board, cease for any reason to constitute a majority of the Board; or (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. -17--16- Severance benefits are based upon a severance period of two or three years, depending on the officer's position. An officer entitled to severance will receive the following: (a) salary and unpaid vacation pay through the date of termination; (b) a pro rata bonus for the year of termination, and base salary 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) up to $30,000 for the cost of outplacement services; and (f) reimbursement for any excise tax imposed on such benefits as excess payments under the Internal Revenue Code. AUDITING COMMITTEE REPORT The Auditing Committee reviews Ameren Corporation'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 2000 Annual Report on SEC Form 10-K with Ameren's management and the independent accountants. Management is responsible for the financial statements and the reporting process, including the system of internal controls. The independent accountants are responsible for expressing an opinion on the conformity of those audited financial statements with accounting principles generally accepted in the United States. The Auditing Committee has discussed with the independent accountants, the matters required to be discussed by Statement on Auditing Standards No. 61, Communication with Audit Committees, as amended. In addition, the Committee has discussed with the independent accountants, the accountants' independence from 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 accountants. The Auditing Committee has considered whether the independent accountants' provision of the services covered under the captions "Independent Accountants" - "Financial Information Systems Design and Implementation Fees" and "All Other Fees" in the proxy statement is compatible with maintaining the accountants' independence. In reliance on the reviews and discussions referred to above, the Auditing Committee recommended to the Board of Directors that the -17- audited financial statements be included in Ameren's Annual Report on SEC Form 10-K for the year ended December 31, 2000, for filing with the Securities and Exchange Commission. /s/ Harvey Saligman, Chairman /s/ Richard A. Liddy /s/ Richard A. Lumpkin /s/ Paul L. Miller, Jr. /s/ Janet McAfee Weakley /s/ James W. Wogsland -18- PERFORMANCE GRAPH
5 Year Cumulative Total Return Ameren Corporaion Corporation, S&P 500, EEI Index Value of $100 invested 12/31/94,95, including reinvestment of dividends YEAR AEE S&P EEI ---- --- --- ---1995 1996 1997 1998 1999 2000 ------ ----- ------ ------ ------ ------ ------ 1994 100.00 100.00 100.00 1995 AEE 100 132.87 130.33 159.54 166.30 136.80 S&P 500 100 137.50 169.47 226.04 291.05 352.57 EEI Index 100 131.02 1996 130.33 169.47 132.59 1997 159.54 226.04 168.88 1998 166.30 291.05 192.34 1999 136.80 352.57 156.56 (1) Information shown for Ameren Corporation prior to 1/1/98 is based on an assumed aggrigateaggregate investment of $100 on 12/31/9495 in the Common Stock of the companies whose Common Stock was exchanged for Ameren Common Stock in the Merger, consisting of $74 invested in Union Electric Common Stock and $26 invested in CIPSCO Incorporated Common Stock. Such amounts were determined based upon the percentages, of the total number of shares of Ameren Common Stock issued in the Merger, that were issued in exchange for Common Stock of Union Electric and CIPSCO Incorporated. Edison Electric Institute Index of 100 investor-owned electric utilities.
-19- INDEPENDENT ACCOUNTANTS The Company has not selected its independent accountants for 2000. This selection is expected to be made by the Board of Directors after the Auditing Committee of the Board of Directors, the members of which are identified under "Item (1): Election of Directors", has reviewed the prior year's audit report with representatives of the independent accountants for such year. After such review, the Auditing Committee will recommend to the Board of Directors for its approval the selection of independent accountants for the Company forFiscal Year 2000 and the fees to be paid for the regular annual audit. PricewaterhouseCoopers LLP served as the Company's independent accountants in 1999.2000. Representatives of thatthe 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. PricewaterhouseCoopers LLP also served as independent accountants for the Company's subsidiaries, including Union Electric and CIPS, in 1999.2000. Audit Fees: The aggregate fees billed or expected to be billed by PricewaterhouseCoopers LLP for professional services rendered for the audit of the Company's annual financial statements for fiscal year 2000 and the reviews of the financial statements included in the Company's Forms 10-Q for such fiscal year were $446,500. All but $35,500 of the fees have been billed through December 31, 2000. Financial Information Systems Design and Implementation Fees: The Company did not engage PricewaterhouseCoopers LLP to provide advice to the Company regarding financial information systems design and implementation during the fiscal year ended December 31, 2000. All Other Fees: Fees and out-of-pocket expenses billed to the Company by PricewaterhouseCoopers LLP during the Company's 2000 fiscal year for all other non-audit services rendered to the Company totaled $1,006,432. Fiscal Year 2001 The Company has not selected its independent accountants for 2001. This selection is expected to be made by the Board of Directors by the second quarter of fiscal 2001 after consideration of the recommendation of the Auditing Committee of the Board of Directors, the present members of which are identified under "Item (1): Election of Directors" and in the Auditing Committee Report. -20- STOCKHOLDER PROPOSALS Any stockholder proposal intended for inclusion in the proxy material for the Company's 20012002 Annual Meeting of Stockholders must be received by November 16, 2000.2001. In addition, under the Company's By-Laws, stockholders who intend to submit a proposal in person at an Annual Meeting, or who intend to nominate a directorDirector at a Meeting,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 Meeting.meeting. A copy of the By-Laws can be obtained by written request to the Secretary of the Company. SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE A Form 4, Statement of Changes of Beneficial Ownership of Securities, filed by Paul A. Agathen, Senior Vice President of Ameren Services Company, pursuant to Section 16(a) of the Securities Exchange Act of 1934 relating to a single transaction, was not filed on a timely -20- basis. The Company is not aware of any other reports on Form 3, Form 4 or Form 5 under such Act that were not filed on a timely basis. MISCELLANEOUS 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 reasonable out-of-pocket expenses in forwarding soliciting material to their principals, the beneficial owners of stock of the Company. Proxies may be solicited by Directors, officers directors and key employees of the Company on a voluntary basis without compensation. The Company will bear the cost of soliciting proxies on its behalf. _____________ A COPY OF THE COMPANY'S MOST RECENT ANNUAL REPORT TO THE SECURITIES AND EXCHANGE COMMISSION ON FORM 10-K WILL BE FURNISHED, WITHOUT CHARGE, TO STOCKHOLDERS OF THE COMPANY UPON WRITTEN REQUEST TO STEVEN R. SULLIVAN, SECRETARY, P.O. BOX 66149, ST. LOUIS, MISSOURI 63166-6149. FOR UP-TO-DATE INFORMATION ABOUT THE COMPANY, PLEASE VISIT THE COMPANY'S HOME PAGE ON THE INTERNET - http://www.ameren.com -21- A - 3 AMEREN CORPORATION APPENDIX A AUDITING COMMITTEE CHARTER The Auditing Committee shall consist of three or more non-employee directors of the Company designated by the Board of Directors who have no relationship to the Company that may interfere with the exercise of their independence from management and the Company. The Auditing Committee shall be approved by a majority of the whole Board of Directors by resolution or resolutions. The members of the Auditing Committee shall meet the independence and experience requirements of the New York Stock Exchange. The Auditing Committee shall have the authority to retain special legal, accounting or other consultants to advise the Committee. It is the Committee's responsibility to: 1. Recommend to the Board of Directors a firm of independent accountants, which firm is ultimately accountable to the Auditing Committee and the Board of Directors. 2. Evaluate the Company's independent accountants (and approve the compensation paid to the independent accountants) and, where appropriate, recommend to the Board of Directors the replacement of the independent accountants. 3. Ensure that the independent accountants submit on a periodic basis to the Auditing Committee a formal written statement delineating all relationships between the independent accountants and the Company and actively engage in a dialogue with the independent accountants with respect to any disclosed relationships or services that may impact the accountants' objectivity and independence; and, if deemed appropriate by the Auditing Committee, recommend that the Board of Directors take appropriate action to ensure the independence of the accountants. 4. Review with the independent accountants and with management the proposed scope of the annual audit (including planning and staffing), past audit experience, the Company's internal audit program, recently completed internal audits and other matters bearing upon the scope of the audit. 5. Review and discuss with management and the independent accountants the annual audited financial statements to be included in the Company's Form 10-K filing, including matters regarding accounting and auditing principles as well as internal controls that could have a significant effect on the Company's financial A-1 statements and any other matters required to be discussed by the Statement on Auditing Standards No. 61, as modified or supplemented, relating to the conduct of the audit. The Auditing Committee shall also recommend to the Board of Directors that the Company's annual financial statements, together with the report of their independent accountants as to their examination, be included in the Company's Annual Report on Form 10-K. 6. The Chairman of the Auditing Committee, management and the independent accountants will review and discuss the Company's quarterly financial statements contained in its Form 10-Q prior to filing with the Securities and Exchange Commission. 7. Review with management any suggestions and recommendations of the independent accountants and internal auditors concerning the Company's auditing and accounting principles and practices, and management's responses to significant findings and recommendations. 8. Meet on a regular basis with a representative or representatives of the Internal Audit Department of the Company and review the Internal Audit Department's Reports of Operations. 9. Review the independent accountant's assessment of the Company's Internal Audit function. 10. Review the appointment, replacement, reassignment or dismissal of the Manager of Internal Audit. 11. Review whether the Company's Statement of Policy on Business Ethics and Conflicts of Interest have been communicated by the Company to all key employees of the Company with a direction that all such key employees certify that they have read, understand and are not aware of any violation of the Statement of Policy on Business Ethics and Conflicts of Interest. 12. In conjunction with management, the Manager of Internal Audit, and the independent accountants, review significant financial risks to the Company and the steps taken to manage such risks. 13. Review policies and procedures related to officers' expense accounts and perquisites, including use of corporate assets. 14. Review legal and regulatory matters that may have a material effect on financial statements, related Company compliance policies, and reports to regulators. A-2 15. Separately meet with internal auditors, independent accountants and management at least annually to review matters requiring private discussion. 16. Meet at least four times per year, or more frequently if circumstances require. The Committee may ask members of management or others to attend and provide information. 17. Report its significant activities and actions to the Board of Directors on a periodic basis. 18. Prepare a report for inclusion in the Company's annual proxy statement as required by rules of the Securities and Exchange Commission and submit it to the Board of Directors for approval. 19. Review and reassess the adequacy of the Auditing Committee charter on an annual basis and submit any recommended changes to the Board of Directors for approval. 20. Obtain from independent accountants assurance that Section 10A of the Private Securities Litigation Reform Act of 1995 has not been implicated. The Auditing Committee's responsibility is oversight and monitoring of the Company's audit, accounting and financial reporting functions and practices, by monitoring, on behalf of the Board, the Company's accounting and financial reporting practices and the Company's system of internal controls; reviewing the financial information and related disclosures that will be provided to shareowners; and communicating regularly with management and the Company's independent outside accountants regarding such matters. The Board of Directors recognizes, however, that in carrying out its oversight responsibilities, the Auditing Committee is not providing any expert or special assurance as to the Company's financial statements or any professional certification as to the work of the independent outside accountants engaged by the Company. The Board of Directors further recognizes that the Company's management is responsible for preparing the Company's financial statements and that the independent outside accountants are responsible for auditing those financial statements. A-3 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 STOCKHOLDERS TO BE HELD ON APRIL 25, 200024, 2001 The undersigned hereby appoints CHARLES W. MUELLER and STEVENSTEVEM R. SULLIVAN, and either of them, each with the power of substitution, as proxy for the undersigned, to vote all the shares of capital stock of AMEREN CORPORATION represented hereby at the Annual Meeting of Stockholders to be held at Powell Symphony Hall, 718 North Grand Boulevard, St. Louis, Missouri, on April 25, 200024, 2001 at 9:00 A.M., and at any adjournment thereof, upon all matters that may be submitted to a vote of stockholders including the matters described in the proxy statement furnished herewith, subject to any directions indicated on the reverse side of this proxy form and in their discretion on any other matter that may be submitted to a vote of stockholders. NOMINEES FOR DIRECTOR - WILLIAM E. CORNELUS, CLIFFORD L. GREENWALT, THOMAS A. HAYS, THOMAS H. JACOBSEN, RICHARD A LIDDY, GORDON R. LOHMAN, RICHARD A. LUMPKIN, JOHN PETERS MacCARTHY, HANNE M. MERRIMAN, PAUL L. MILLER, JR., CHARLES W. MUELLER, ROBERT H. QUENON, HARVEY SALIGMAN, JANET MCAFEE WEAKLEY AND JAMES W. WOGSLAND PLEASE VOTE, DATE AND SIGN ON THE REVERSE SIDE hereof and return this proxy form 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 - - THANK YOU FOR YOUR PROMPT ATTENTION - - FOLD AND DETACH HERE / x / Please mark votes This proxy will be voted as specified below. If no direction is made, this as in this example. 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 VOTING FOR ITEM 1. THE BOARD OF DIRECTORS RECOMMENDS A VOTE AGAINST ITEMS 2 AND 3. - ---------------------------------------------------- ---------------------------------------------------------------ITEM 2. FOR all nominees WITHHOLD AUTHORITY (except as listed all nominees below) FOR AGAINST ABSTAIN FOR AGAINST ABSTAIN ITEM 1 / / / / ITEM 2 / / / / / / ITEM 3 / / / / / / ELECTION OF REPORT ON CUMULATIVECALLAWAY DIRECTORS CALLAWAY VOTING PLANT RELEASES FOR ALL EXCEPT:__________________________________ ATTENDANCE CARD REQUESTED / / FOR ALL EXCEPT:__________________________________ SEE [AMEREN LOGO] SEE DATED__________________________2000DATED________________2001 REVERSE SIDE ------------------------------------------------------- SIGNATURE - Please sign exactly as name appears hereon. ------------------------------------------------------- CAPACITY (OR SIGNATURE IF HELD JOINTLY) Shares registered in the name of a Custodian or Guardian must be signed by such. Executors, administrators, trustees, etc. should so indicate when signing.