[AMEREN LOGO]


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



      Time:     9:00 A.M.
                Tuesday
                April 27, 199925, 2000


      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 check the appropriate  box on the proxy.  Persons without tickets will be
admitted to the meeting upon verification of their stockholdings in the Company.





     Please vote,  date, sign, and return the enclosed proxy in the accompanying
reply envelope 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 27, 1999,25, 2000, at 9:00 A.M., for the purposes of

      (1)electing directors of the Company for terms ending in April 2000;2001;

      (2)considering  a  stockholder proposal;proposal  relating  to  releases  from  the
         Callaway Plant;

      (3)considering a stockholder proposal relating to cumulative voting; and

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

     If you owned shares of the Company's  Common Stock at the close of business
on March 5, 1999,6, 2000, you are entitled to vote at the meeting and at any adjournment
thereof.

     To assure that your shares are  represented  at this meeting,  please vote,
date, sign, and return the enclosed proxy in the enclosed  envelope.  The prompt
return of your proxy will reduce expenses.

By order of the Chairman and the Board of Directors.



                                    STEVEN R. SULLIVAN
                                    Secretary



St. Louis, Missouri
March 18, 199916, 2000




PROXY STATEMENT OF AMEREN CORPORATION
(First sent or given to stockholders March 18, 1999)16, 2000)

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

     The  enclosed  proxy is  solicited  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 27, 1999,25, 2000,  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  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.


                                     VOTING

     The  accompanying  proxy  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 5, 1999,6, 2000, 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 majority 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 voting
in person at the meeting.

     Returned  proxies  which are  properly  marked and signed  will be voted as
directed.  If you sign the proxy but do not make specific  choices,  your shares
will be  voted  as  recommended  by the  Board --- FOR the  Board's  nominees  for
Director;  AGAINST Item 2; and AGAINST Item 2.3. On any other  matters,  the named
proxies will use their discretion.

     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,

                                      1-1-



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.


                             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.

Pursuant to the Company's  By-Laws,  the Board of Directors has reduced the
number of Directors from 15 to 14,  effective with the 1999 Annual Meeting.

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.Board  of  Directors.
Director of the Company since 1997. Other directorships: GenAmerica Corporation.
Age: 67.68.

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: 66.67.

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  2

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: 66.67.

RICHARD A. LIDDY

Chairman,  President,  and Chief  Executive  Officer of GenAmerica  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 Group  Inc.;  Ralston  Purina
Company; certain subsidiaries of GenAmerica Corporation. Age: 63.64.

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.Board of
Directors.  Director of the Company  since 1997.  Other  directorships:  Fortune
Brands, Inc. Age: 64.65.

RICHARD A. LUMPKIN

Chairman,  President  and  Chief  Executive  Officer  of  Illinois  Consolidated
Telephone  Company,  Mattoon,  Illinois,  and Vice  Chairman of  McLeod USAMcLeodUSA  Inc. and
Chairman of  Illuminet  Holdings,  Inc.  Mr.  Lumpkin was elected  Treasurer  of
Illinois Consolidated  Telephone in 1968 and President in 1977, and was named to
his present position in 1990. As the result of a September 1997 merger,  he also
serves as Vice Chairman of McLeod USA.McLeodUSA.  He is a member of the Auditing  Committee
of  the  Board.  Director  of  the  Company  since  1997.  Other  directorships:
McLeod USA;McLeodUSA; First Mid-Illinois Bancshares, Inc.; First Mid-
IllinoisMid-Illinois Bank & Trust.Trust;
Illuminet Holdings, Inc. Age: 64.65.

JOHN PETERS MACCARTHYMacCARTHY

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  3



Committee of the Board.Committee.  Director of the  Company  since 1997.
Other directorships: Brown Group Inc.Shoe Company. Age: 65.66.

                                      -3-




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 AirAirways Group, Inc.; State Farm
Mutual Automobile  Insurance Co.; The Rouse Company; T. Rowe Price Mutual Funds;
Finlay Enterprises, Inc. Age: 57.58.

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: 56.57.

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.  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-
AdministrativePresident-Administrative Services in 1988,1988; President in 1993 and Chief Executive
Officer in 1994. Mr. Mueller was elected  Chairman  of Ameren and President and Chief
Executive Officer 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: 60.61.

ROBERT H. QUENON

Retired Chairman of Peabody Holding  Company,  Inc., which is engaged in mining,
marketing and transportation of coal. Mr. Quenon was

                                       4

 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: 70.71.

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.  Mr.  SaligmanHe is  Chairman  of the
Auditing Committee of the Board. Director of the Company since 1997. Other
directorships: Mercantile Bancorporation Inc. Age: 60.61.

JANET McAFEE WEAKLEY

President  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: 69.70.

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:
67.68.

     The  fourteen  nominees  for  director  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.  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 1998,1999,  the Board of Directors  met six times.  AllExcept for Mr. Liddy,
all  nominees  attended at least 78%75% 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 94%90%.


                                       5


     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.  In
addition,  the  eligibility  of former  employees,  except  for one who has been
elected Chief Executive Office 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.

     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)  recommending  to the Board  the  appointment  of  independent
accountants and approving fees for the services they perform;  and (4) reviewing
the  scope  of  audits  and  annual  budget  of  the  Company's  internal  audit
department. The Auditing Committee held fourthree meetings in 1998.1999.

     The Contributions Committee makes policies and recommendations with respect
to charitable  and other  contributions.  The  Contributions  Committee held two
meetingsone
meeting in 1998.1999.

     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 1998.1999.

     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 fourfive
meetings in 1998.1999.

     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 did not meetheld one meeting in 1998.1999.

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

     Each  director  who is not an employee  of the  Company  receives an annual
retainer of $20,000, an annual award of 300400 shares of the 6

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  directors  permits
non-employee directors to defer all or part of their annual 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 19992000 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;
7

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;
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 1997,1998, the Company reported releasing 684.81,394.1 curies
     of  tritium in 231238  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 downstreamdownwind 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 one 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  8

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-

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 matters,matter, other than the election
of directors and the  proposalproposals  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 11,  1999,10,  2000,  Capital  Research  and  Management
Company,  333  South  Hope  Street,  Los  Angeles,  California  90071,  had sole
dispositive  power over 10,385,40011,382,800  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  7.6%8.3% of the  outstanding  Common  Stock of the
Company.

                                      9-10-




                        SECURITY OWNERSHIP OF MANAGEMENT

Shares of Common Stock of the Company Beneficially Owned Name as of February 1, 19992000 ---- ---------------------------------------------- Paul A. Agathen 10,82015,043 Donald E. Brandt 9,37014,580 William E. Cornelius 11,17311,688 Clifford L. Greenwalt 14,67115,906 Thomas A. Hays 7,1579,738 Richard A. Liddy 2,6213,136 Gordon R. Lohman 8251,269 Richard A. Lumpkin 1,8153,270 John Peters MacCarthy 6,0579,638 Hanne M. Merriman 2,5823,165 Paul L. Miller, Jr. 2,2182,775 Charles W. Mueller 30,38345,054 Robert H. Quenon 3,0653,682 Gary L. Rainwater 3,0604,416 Garry L. Randolph 7,346 Harvey Saligman 3,057 Charles J. Schukai 10,1963,638 Janet McAfee Weakley 3,7254,282 James W. Wogsland 1,6492,093 All Directors and executive officers as a group 173,969264,453 Includes shares held jointly. Also includes shares issuable within 60 days upon the exercise of stock options as follows: Mr. Agathen, 6,400;10,575; Mr. Brandt, 8,150;13,200; Mr. Mueller, 22,175;36,175; and Mr. Schukai, 5,350.Randolph, 5,150. 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 nominee or executive officer does not claim beneficial ownership. Shares beneficially owned by all directors, nominees for director and executive officers in the aggregate do not exceed one percent of any class of equity securities outstanding.
EXECUTIVE COMPENSATION Ameren Corporation Human Resources Committee Report on Executive Compensation Ameren Corporation and its subsidiaries' (collectively referred to as "Ameren") goal for executive salariescompensation is to approximate the median of the range of salariescompensation paid by similarly-situatedsimilar companies. Accordingly, the Human Resources Committee of the Board of Directors of Ameren -11- Corporation, which is comprised entirely of non-employee directors, makes annual reviews of the compensation paid to the executive officers of Ameren. The Committee's salarycompensation decisions with respect to the five 10 highest paid officers of Ameren Corporation and eachits principal subsidiarysubsidiaries 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; 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 similarly-situatedsimilar 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 1998,1999, 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 1998,1999, actual payments ranged from 29%28.5% to 36%35.5% of base salary. The third component of the 19981999 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, 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 11 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 similarly-situatedsimilar companies. In determining the reported 19981999 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 19981999 EPS. Authorized salariescompensation for the Company's executive officers fell within the ranges of those paid by similarly-situatedsimilar companies. /s/ John Peters MacCarthy, Chairman /s/ Thomas A. Hays /s/ Gordon R. Lohman /s/ Robert H. Quenon Gordon R. Lohman 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 1998. 121999. -13- SUMMARY COMPENSATION TABLE
Long-Term Annual Compensation ------------ AnnualName and Compensation Securities All Other Name and Compensation------------ Underlying Compen- Principal Position Year Salary($) Bonus($) Options(#) sation($) --------------------- ---- --------- -------- ---------- --------- C.W.C. W. Mueller, 1999 580,000 206,000 75,300 45,850 Chairman of Ameren; 1998 550,000 198,000 63,800 53,751 Chairman of Ameren; President and 1997 500,000 155,000 23,000 45,723 President and 1996 441,000 165,000 17,700 39,306 Chief Executive Officer, Ameren, Union Electric and Ameren Services Company G.L.RainwaterG. L. Rainwater 1999 342,000 97,500 27,900 4,825 President and Chief 1998 325,000 93,000 25,800 66 President and Chief Executive Officer, CIPS 1997 246,000 - - 134 Executive Officer, CIPS 1996 146,000 32,000 2,500 4,160 C.J. Schukai 1998 280,000 80,000 25,800 41,921D. E. Brandt 1999 292,000 78,800 27,900 35,781 Senior Vice 1997 269,000 68,000 7,800 36,839 President, Union 1996 258,000 76,000 6,800 33,506 Electric and Ameren Services Company D.E. Brandt 1998 274,000 79,000 25,800 31,947 Senior Vice Ameren, Union Electric 1997 254,000 64,000 7,800 27,580 President, Ameren, 1996 242,000 69,000 6,800 24,278 Union Electric and Ameren Services Company P.A.P. A. Agathen 1999 242,000 65,300 27,900 22,435 Senior Vice 1998 230,000 63,000 25,800 19,644 Senior Vice President, Ameren 1997 215,000 51,000 7,800 18,045 President, Ameren 1996 200,000 55,000 6,800 15,257 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 include (a) matching contributions to the 401(k) plan and (b) above- marketabove-market earnings on deferred compensation, as follows: (a) (b) C.W.C. W. Mueller $4,800 $48,951 G.L.$41,050 G. L. Rainwater - 66 C.J. Schukai 4,306 37,615 D.E.3,952 873 D. E. Brandt 4,800 27,147 P.A.5,313 30,468 P. A. Agathen 4,000 15,6444,605 17,830 G. L. Randolph 5,706 1,127
13-14- OPTION GRANTS IN 19981999
Number of % of Total Grant Shares Options Date Underlying Granted to Exercise Present Options Employees Price Expiration Value Name Granted in 19981999 ($/Sh) Date ($) ---- ---------- ------- ------ ---- --- C.W.C. W. Mueller 63,800 9.11 39.25 4/28/08 316,448 G.L.75,300 9.8 36.625 2/12/09 354,663 G. L. Rainwater 25,800 3.68 39.25 4/28/08 127,968 C.J. Schukai 25,800 3.68 39.25 4/28/08 127,968 D.E.27,900 3.63 36.625 2/12/09 131,409 D. E. Brandt 25,800 3.68 39.25 4/28/08 127,968 P.A.27,900 3.63 36.625 2/12/09 131,409 P. A. Agathen 25,800 3.68 39.25 4/28/08 127,96827,900 3.63 36.625 2/12/09 131,409 G. L. Randolph 10,700 1.39 36.625 2/12/09 50,397 Options vest 25% annually beginning April 28, 2000.February 12, 2001. Options are not transferable. The Grant Date Present Values were determined using the binomial option pricing model, a derivative of the Black-Scholes option pricing model. Assumptions used for the model are as follows: an option term of ten years, stock volatility of 17.63%18.80%, a dividend yield of 6.55%6.51%, risk-free interest rate of 6.01%5.44%, and a vesting restrictions discount rate of 3% per year over the five-year vesting period. The Grant Date Present Value calculation is presented in accordance with SEC proxy requirements, and the Company has no way to determine whether the pricing model can properly determine the value of an option. There is no assurance that the value, if any, that may be realized will be at or near the value estimated by the model. No value will be realized by the optionee unless the stock price increases from the exercise price, in which case shareholders would benefit commensurately.
AGGREGATED OPTION EXERCISES IN 19981999 AND YEAR-END VALUES
Value of Shares Number ofUnexercised In-the-Money Acquired Value Shares Underlying Unexercised Value of In-the-Money OnOptions Options on Realized Options at Year End(#) Options at Year End($) Name Exercise(#) ($)Exercise $ Exercisable Unexercisable Exercisable Unexercisable ---- ----------- ----------- ------------- ----------- ------------- ----------- ------------- C.W.C. W. Mueller - - 11,925 107,875 48,985 341,373 G.L.25,925 169,715 - - G. L. Rainwater - - - 25,80053,700 - 81,433 C.J. Schukai 2,800 21,613 1,700 41,500 - 130,189 D.E.D. E. Brandt - - 4,500 41,500 18,288 130,189 P.A.9,550 64,350 - - P. A. Agathen - - 2,750 39,750 6,858 118,7606,925 63,475 - - G. L. Randolph - - 3,675 24,725 - -
14-15- 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 for 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 Bonds 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. 15-16- In certain cases pension benefits under the Retirement Plan are reduced to comply with maximum limitations imposed by the Internal Revenue Code. A Supplemental plans areRetirement Plan is maintained by Ameren Union Electric and CIPS 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. Such plans areThe plan is unfunded and areis not a qualified plansplan under the Internal Revenue Code. CIPS makes contributions to an irrevocable trust to provide funds to assist in meeting its liabilities under its supplemental plan. 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 19981999 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.C. W. Mueller 2003 $380,000 G.L.$430,000 G. L. Rainwater 2011 156,000 C.J. Schukai 1999 191,000 D.E.203,000 D. E. Brandt 2019 237,000273,000 P. A. Agathen 2012 167,00099,000 G. L. Randolph 2013 192,000
CIPS maintains a Supplemental Executive Retirement Plan solely for the purpose of providing retirement benefit payments to Mr. Rainwater in addition to payments under the Ameren Retirement Plan. This Plan is unfunded and is not a qualified plan under the Internal Revenue Code. Such benefits are included in the above table. 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."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 16 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- 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,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. 17-18- PERFORMANCE GRAPH
5 Year Cumulative Total Return Ameren Corporation,Corporaion 1), S&P 500, EEI Index Value of $100 invested 12/31/93,94, including reinvestment of dividends YEAR AEE S&P EEI ---- --- --- --- 1993 100 100 100 1994 96 101 87100.00 100.00 100.00 1995 128 139 111132.87 137.50 131.02 1996 125 172 110130.33 169.47 132.59 1997 154 229 143159.54 226.04 168.88 1998 160 295 166166.30 291.05 192.34 1999 136.80 352.57 156.56 Information shown for Ameren Corporation prior to 1/1/98 is based on an assumed aggregrateaggrigate investment of $100 on 12/31/9394 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 percetages,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.
18-19- INDEPENDENT ACCOUNTANTS The Company has not selected its independent accountants for 1999.2000. 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,"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 for 19992000 and the fees to be paid for the regular annual audit. PricewaterhouseCoopers LLP served as the Company's independent accountants in 1998.1999. Representatives of that 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 1998. Prior to the 1997 Merger, Arthur Andersen LLP served as CIPS' independent accountants for many years.1999. STOCKHOLDER PROPOSALS Any stockholder proposal intended for inclusion in the proxy material for the Company's 20002001 Annual Meeting of Stockholders must be received by November 19, 1999.16, 2000. 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 director at a 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. 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, 19 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 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 20-21- 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, 2000 The undersigned hereby appoints CHARLES W. MUELLER and STEVEN 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, 2000 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, 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. - ---------------------------------------------------- --------------------------------------------------------------- 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 CUMULATIVE DIRECTORS CALLAWAY VOTING PLANT RELEASES FOR ALL EXCEPT:__________________________________ ATTENDANCE CARD REQUESTED / / [AMEREN LOGO] SEE DATED__________________________2000 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.