UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 10-Q

[X]      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
         OF THE SECURITIES EXCHANGE ACT OF 1934

         For Quarterly Period Ended March 31, 1998

[  ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
         OF THE SECURITIES EXCHANGE ACT OF 1934

         For The Transition Period From                    to

                         Commission file number 1-14756.

                               AMEREN CORPORATION
             (Exact name of registrant as specified in its charter)

         Missouri                                                43-1723446
(State or other jurisdiction of                               (I.R.S. Employer
incorporation or organization)                               Identification No.)


                 1901 Chouteau Avenue, St. Louis, Missouri 63103
              (Address of principal executive offices and Zip Code)


                         Registrant's telephone number,
                       including area code: (314) 621-3222


         Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.


                          Yes    X   .         No       .


Shares  outstanding of each of registrant's  classes of common stock as of April
30, 1998:
    Common Stock, $ .01 par value - 137,215,462










                               Ameren Corporation

                                      Index

                                                                        Page No.

Part I            Consolidated Financial Information (Unaudited)

                  Management's Discussion and Analysis                         2

                  Consolidated Balance Sheet
                  - March 31, 1998 and December 31, 1997                       6

                  Consolidated Statement of Income
                  - Three months and 12 months ended
                    March 31, 1998 and 1997                                    7

                  Consolidated Statement of Cash Flows
                  - Three months ended March 31, 1998 and 1997                 8

                  Notes to Consolidated Financial Statements                   9



Part II           Other Information




             PART I. CONSOLIDATED FINANCIAL INFORMATION (UNAUDITED)

MANAGEMENT'S DISCUSSION  AND  ANALYSIS OF  FINANCIAL  CONDITION AND  RESULTS  OF
OPERATIONS

OVERVIEW

Ameren  Corporation  (Ameren)  is a  newly  created  holding  company  which  is
registered  under the Public  Utility  Holding  Company Act of 1935 (PUHCA).  In
December  1997,  Union  Electric  Company  (AmerenUE)  and  CIPSCO  Incorporated
(CIPSCO)  combined to form Ameren,  with  AmerenUE  and  CIPSCO's  subsidiaries,
Central  Illinois  Public Service  Company  (AmerenCIPS)  and CIPSCO  Investment
Company (CIC) becoming  wholly-owned  subsidiaries of Ameren (the Merger).  As a
result of the Merger,  Ameren has a 60% ownership  interest in Electric  Energy,
Inc. (EEI), which is consolidated for financial reporting purposes. In addition,
the Registrant formed a new energy marketing  subsidiary,  Ameren Energy,  which
will focus on power marketing  transactions,  serving as a power marketing agent
for the operating  companies and providing a range of energy and risk management
services to targeted customers.

The  Merger  was  accounted  for  as  a   pooling-of-interests;   therefore  the
consolidated   financial   statements  are  presented  as  if  the  Merger  were
consummated as of the beginning of the earliest period presented.  However,  the
consolidated  financial statements are not necessarily indicative of the results
of operations, financial position or cash flows that would have occurred had the
Merger been consummated for the periods for which it is given effect,  nor is it
necessarily  indicative of the future results of operations,  financial position
or cash flows.

The following  discussion and analysis  should be read in  conjunction  with the
Notes  to  Consolidated  Financial  Statements  beginning  on  page  9,  and the
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations (MD&A), the Audited  Consolidated  Financial Statements and the Notes
to Consolidated  Financial  Statements appearing in the Registrant's 1997 Annual
Report to stockholders.

References to the Registrant are to Ameren on a consolidated basis;  however, in
certain  circumstances,  the subsidiaries are separately referred to in order to
distinguish between their different business activities.

RESULTS OF OPERATIONS

Earnings

First quarter 1998 earnings of $40 million,  or 29 cents per share,  declined $5
million, or 4 cents per share, from 1997's first quarter earnings.  Earnings for
the 12 months  ended  March 31,  1998,  were $330  million,  or $2.40 per share,
compared to $359 million, or $2.62 per share, for the preceding 12-month period.
Excluding the  extraordinary  charge  recorded in the fourth  quarter of 1997 to
write  off the  generation-related  regulatory  assets  and  liabilities  of the
Registrant's Illinois retail electric business, earnings for the 12-month period
ended March 31, 1998, were $381 million, or $2.78 per share.

Earnings and earnings per share fluctuated due to many  conditions,  the primary
ones being:  weather variations,  credits to electric  customers,  sales growth,
fluctuating  operating  costs,  the  write-off  of  certain   generation-related
regulatory  assets and liabilities,  and  merger-related  costs. The significant
items affecting revenues, costs and earnings during the three-month and 12-month
periods ended March 31, 1998, and 1997 are detailed below.

In March 1998,  the  Registrant  reported that it expects that 1998 earnings per
share will reach the higher end of the range of $2.50 to $2.75 per share.


Electric Operations



Electric Operating Revenues                          Variations for periods ended March 31, 1998
                                                           from comparable prior-year periods
- -----------------------------------------------------------------------------------------------
(Millions of Dollars)                                        Three Months       Twelve Months
- ----------------------------------------------------------------------------------------------
                                                                                 
Credit to customers                                                $  2                 $ 28
Effect of abnormal weather                                          (14)                   2
Growth and other                                                     21                   31
Interchange sales                                                   (33)                 (71)
EEI                                                                 (19)                 (13)
- ----------------------------------------------------------------------------------------------
                                                                   $(43)                $(23)
- ----------------------------------------------------------------------------------------------

 
                                      2


The $43  million  decline in first  quarter  electric  revenues  compared to the
year-ago quarter is primarily due to milder weather, decreased interchange sales
and  lower  sales  to  the  Department  of  Energy  by  EEI.   Weather-sensitive
residential  sales declined 2 percent while  commercial sales were flat compared
to 1997  quarterly  sales,  and  industrial  sales rose 2 percent,  reflecting a
strong regional  economy.  Interchange  sales decreased 47 percent due to market
conditions.

The $23 million decrease in electric  revenues for the 12 months ended March 31,
1998  compared to the prior  12-month  period is due to a 24 percent  decline in
interchange  sales,  partially  offset by lower  credits  to  Missouri  electric
customers.  Residential  sales  remained flat,  while  commercial and industrial
sales  increased  1 percent  and 2 percent,  respectively,  reflecting  a strong
regional economy.



Fuel and Purchased Power                                  Variations for periods ended March 31, 1998
                                                              from comparable prior-year periods
- -------------------------------------------------------------------------------------------------
(Millions of Dollars)                                          Three Months        Twelve Months
- -------------------------------------------------------------------------------------------------
                                                                                 
Fuel:
    Variation in generation                                        $(16)                $   4
    Price                                                             2                   (14)
    Generation efficiencies and other                                 4                     -
Purchased power variation                                           (12)                  (41)
EEI                                                                 (16)                  (15)
- -------------------------------------------------------------------------------------------------
                                                                   $(38)                 $(66)
- -------------------------------------------------------------------------------------------------


Fuel and purchased  power costs for the three months ended March 31, 1998 versus
the comparable  prior-year quarter declined $38 million resulting primarily from
lower interchange sales, as well as lower sales at EEI. The decrease in fuel and
purchased power costs for the 12 months ended March 31, 1998 versus the year-ago
period  was  driven  mainly by lower  purchased  power  costs  due to  decreased
interchange  kilowatthour  sales, as well as lower fuel prices, and a decline in
fuel and purchased power costs at EEI.

Gas Operations

Gas  revenues  for the  three  months  ended  March  31,  1998  compared  to the
comparable  prior-year  period decreased $15 million primarily due to the effect
of milder weather on dekatherm  sales to ultimate  customers and lower gas costs
reflected in the purchased gas adjustment  clause. Gas revenues for the 12-month
period ended March 31, 1998 decreased $18 million  compared to the same year-ago
period  primarily due to a decline in dekatherm sales to ultimate  customers and
lower gas costs reflected in the purchased gas adjustment clauses.

Gas costs for the three months and 12 months  ended March 31, 1998  declined $16
million and $18 million,  respectively,  compared to the year-ago  periods.  The
decreases in gas costs for these periods were due to lower  dekatherm  sales and
lower gas prices.

Other Operating Expenses

Other operating expense variations  reflected  recurring factors such as growth,
inflation, labor and benefit increases.

Other  operations  expenses  increased $7 million for the first  quarter of 1998
compared  to  the  same  year-ago   period  due  to  increases  in   information
system-related   costs,   injuries  and  damages,   automated  meter  costs  and
advertising expenses.  The $37 million increase in other operations expenses for
the 12 months  ended March 31, 1998  compared to the prior  12-month  period was
primarily  due to  increases  in  information  system-related  costs,  labor and
injuries and damages expenses.

Maintenance expenses for the first quarter of 1998 decreased $3 million compared
to  the  year-ago   quarter  due  to  a  reduction  in  scheduled  fossil  plant
maintenance.  The $2 million  increase in maintenance  expenses for the 12-month
period  ended March 31, 1998  compared to the prior  12-month  period was due to
increased scheduled fossil plant maintenance, partially offset by the absence of
a Callaway Plant refueling during the period.  In April 1998, the Callaway Plant
commenced its scheduled  refueling outage. The refueling outage was completed in
early May 1998.

Depreciation and amortization expense for the three-month period ended March 31,
1998 remained flat. For 12-month period ended March 31, 1998,  depreciation  and
amortization  expense  increased $4 million,  versus the comparable 1997 period,
primarily  due to increased  depreciable  property and the  amortization  of the
Missouri  portion of  merger-related  costs which were  recorded as a regulatory
asset upon Merger close under conditions of the Merger agreement.

                                       3


In March 1998,  the  Registrant  announced  plans to reduce its other  operating
expenses,  including plans to eliminate  approximately 400 employee positions by
mid-1999 through a hiring freeze and a targeted  voluntary  separation plan. The
Registrant expects that its voluntary separation plan will result in a charge to
earnings in the third  quarter of 1998 once it is known the number of  employees
that will accept the terms of the plan. At this time,  the  Registrant is unable
to  estimate  the  expected  charge to  earnings  resulting  from the  voluntary
separation plan.

Taxes

Income taxes charged to operating  expenses for the three months ended March 31,
1998  decreased $3 million versus the  comparable  1997 period  primarily due to
lower  operating  income.  The $11 million  decrease in income taxes  charged to
operating  expenses  for the 12 months  ended  March 31,  1998  compared  to the
year-ago period is primarily due to a lower effective tax rate.

Other Income and Deductions

Miscellaneous,  net for the three  months  ended  March 31,  1998  increased  $1
million   versus  the   comparable   1997  period,   primarily  due  to  reduced
merger-related costs. Miscellaneous,  net increased $14 million for the 12-month
period ended March 31, 1998 compared to the year-ago period primarily due to the
reversal of the Missouri portion of merger-related  costs which were recorded as
a regulatory asset upon Merger close under conditions of the Merger agreement.

Interest and Preferred Dividends

Interest and preferred  dividends for the three months and 12 months ended March
31,  1998,  increased  $1  million  and $2  million,  respectively,  versus  the
prior-year  period,  primarily due to an increase in long-term debt  outstanding
compared to the prior year.

Balance Sheet

The $54 million decrease in trade accounts receivable and unbilled  revenues was
due primarily to lower  revenues in February and March 1998 compared to November
and December 1997.

Changes in accounts and wages payable, taxes accrued and other accruals resulted
from the timing of various payments to taxing authorities and suppliers.


LIQUIDITY AND CAPITAL RESOURCES

Cash provided by operating  activities totaled $138 million for the three months
ended March 31, 1998, compared to $66 million during the same 1997 period.

Cash flows used in investing  activities totaled $62 million and $95 million for
the three  months  ended  March 31,  1998 and 1997,  respectively.  Construction
expenditures  for the three months ended March 31, 1998 for  constructing new or
improving  existing  facilities  and  complying  with the Clean Air Act were $65
million. In addition,  the Registrant expended $4 million for the acquisition of
nuclear fuel. Capital  requirements for the remainder of 1998 are expected to be
principally for construction expenditures and the acquisition of nuclear fuel.

Cash flows used in  financing  activities  were $41 million for the three months
ended March 31, 1998, compared to cash flows provided by financing activities of
$55 million during the same 1997 period.  The Registrant's  principal  financing
activities  for the three months  ended March 31, 1998  included the issuance of
$65 million of long-term  debt,  the redemption of $35 million of long-term debt
and the payment of dividends.  On February 13, 1998, the  Registrant's  Board of
Directors declared a quarterly dividend of 63.5 cents per common share which was
paid to shareholders  on March 31, 1998.  Common stock dividends paid for the 12
months  ended March 31,  1998,  resulted in a pay out rate of 101 percent of the
Registrant's   earnings  to  common   stockholders  (88  percent  excluding  the
extraordinary  charge).  Dividends paid to the Registrant's  common shareholders
relative to net cash provided by operating  activities  for the same period were
44 percent.

The Registrant  plans to continue  utilizing  short-term  debt to support normal
operations and other temporary requirements. The Registrant and its subsidiaries
are authorized by the Securities and Exchange  Commission under PUHCA to have up
to  an  aggregate  $1.6  billion  of  short-term   unsecured  debt   instruments
outstanding  at any one  time.  Short-term  borrowings  consist  of  bank  loans
(maturities  generally on an overnight basis) and commercial  paper  (maturities
generally within 10 to 45 days). At March 31, 1998, the Registrant had committed
bank lines of credit aggregating $234 million (of which $176 million were unused
and $127  million  were  available  at such date) which make  available  interim
financing at various rates of interest based on LIBOR,  the bank  certificate of
deposit rate or other  options.  The lines of credit are  renewable  annually at
various dates  throughout  the year. At March 31, 1998,  the Registrant had $112
million  of  short-term  borrowings.  The  Registrant  also  has

                                       4


a  bank credit agreement due 2003 which  permits  the  borrowing of  up  to $200
million on a  short-term  basis.  This credit  agreement is  available  for  the
Registrant's own  use  and  for  the  use  of  its  subsidiaries.  There were no
outstanding  borrowings under this agreement as of March 31, 1998.

Additionally,  AmerenUE has a bank credit  agreement  due 1999 which permits the
borrowing  of up to $300  million  on a  long-term  basis.  At March  31,  1998,
AmerenUE  had  $75  million  of  borrowings   outstanding  against  this  credit
agreement.

AmerenUE also has a lease agreement which provides for the financing  of nuclear
fuel. At March 31, 1998, the  maximum  amount  that  could be financed under the
agreement was $120  million.  Cash provided from financing for the three  months
ended March 31, 1998 included  issuances  under the lease for nuclear fuel of $1
million offset in part by $10 million of  redemptions.  At March 31, 1998,  $109
million was financed under the lease.

RATE MATTERS

As a result of the Electric  Service Customer Choice and Rate Relief Law of 1997
providing  for   electric  utility   restructuring  in  Illinois,  AmerenUE  and
AmerenCIPS  filed  proposals  with the  Illinois  Commerce  Commission  (ICC) to
eliminate the  electric fuel adjustment clause  for  Illinois  retail customers,
thereby including  a historical  level of fuel  costs  in  base  rates.  The ICC
approved AmerenCIPS' and AmerenUE's filings on March 25, 1998 and April 28,1998,
respectively.


ACCOUNTING MATTERS

In February 1998, the Financial  Accounting  Standards Board issued Statement of
Financial  Accounting  Standards (SFAS) No. 132,  "Employers'  Disclosures about
Pensions  and  Other  Postretirement  Benefits."  SFAS  132  revises  employers'
disclosures  about pension and other  postretirement  benefit plans. SFAS 132 is
effective for fiscal years beginning after December 15, 1998,  although  earlier
application is encouraged. SFAS 132 is not expected to have a material impact on
the Registrant's financial position or results of operations upon adoption.

In March 1998,  the  Accounting  Standards  Executive  Committee of the American
Institute of Certified  Public  Accountants  issued  Statement of Position (SOP)
98-1,  "Accounting for the Costs of Computer Software  Developed or Obtained for
Internal  Use."  SOP 98-1  provides  guidance  on  accounting  for the  costs of
computer  software  developed  or obtained  for  internal  use.  Under SOP 98-1,
certain costs which are currently  expensed by the Registrant may be capitalized
and amortized  over some future  period.  SOP 98-1 is effective for fiscal years
beginning after December 15, 1998,  although earlier  application is encouraged.
At this time,  the  Registrant  is unable to determine the impact of SOP 98-1 on
its financial position or results of operations upon adoption.


SAFE HARBOR STATEMENT

Statements made in this Form 10-Q which are not based on historical  facts,  are
forward-looking  and,  accordingly,  involve risks and uncertainties  that could
cause actual results to differ  materially from those  discussed.  Although such
forward-looking  statements  have  been  made in good  faith  and are  based  on
reasonable assumptions,  there is no assurance that the expected results will be
achieved.  These statements include (without limitation) statements as to future
expectations,  beliefs, plans, strategies,  objectives,  events,  conditions and
financial  performance.  In connection with the "Safe Harbor"  provisions of the
Private  Securities  Litigation  Reform Act of 1995, the Registrant is providing
this cautionary  statement to identify important factors that could cause actual
results to differ materially from those  anticipated.  Factors include,  but are
not  limited to, the effects of  regulatory  actions;  changes in laws and other
governmental actions; competition; future market prices for electricity; average
rates for electricity in the Midwest; business and economic conditions;  weather
conditions; fuel prices and availability; generation plant performance; monetary
and fiscal policies; and legal and administrative proceedings.

                                       5



                               AMEREN CORPORATION
                           CONSOLIDATED BALANCE SHEET
                                    UNAUDITED
                      (Thousands of Dollars, Except Shares)


                                                                    March 31,   December 31,
ASSETS                                                                1998          1997
- ------                                                            ------------  ------------
                                                                          
Property and plant, at original cost:
   Electric                                                        $11,539,426   $11,522,730
   Gas                                                                 452,917       447,458
   Other                                                                80,745        36,023
                                                                   -----------   -----------
                                                                    12,073,088    12,006,211
   Less accumulated depreciation and amortization                    5,361,923     5,285,434
                                                                   -----------   -----------
                                                                     6,711,165     6,720,777
Construction work in progress:
   Nuclear fuel in process                                             139,306       134,804
   Other                                                               110,799       131,504
                                                                   -----------   -----------
         Total property and plant, net                               6,961,270     6,987,085
                                                                   -----------   -----------
Investments and other assets:
   Investments                                                          92,778        97,188
   Nuclear decommissioning trust fund                                  147,304       122,438
   Other                                                                73,331        64,915
                                                                   -----------   -----------
         Total investments and other assets                            313,413       284,541
                                                                   -----------   -----------
Current assets:
   Cash and cash equivalents                                            45,824         9,696
   Accounts receivable - trade (less allowance for doubtful
         accounts of $5,301 and $4,845, respectively)                  250,902       266,306
   Unbilled revenue                                                     64,409       102,864
   Other accounts and notes receivable                                  51,293        49,765
   Materials and supplies, at average cost -
      Fossil fuel                                                       96,852        93,431
      Other                                                            136,013       134,152
   Other                                                                39,211        55,002
                                                                   -----------   -----------
         Total current assets                                          684,504       711,216
                                                                   -----------   -----------
Regulatory assets:
   Deferred income taxes                                               639,324       639,792
   Other                                                               198,791       204,913
                                                                   -----------   -----------
         Total regulatory assets                                       838,115       844,705
                                                                   -----------   -----------
Total Assets                                                       $ 8,797,302   $ 8,827,547
                                                                   ===========   ===========

CAPITAL AND LIABILITIES
Capitalization:
   Common stock, $.01 par value, authorized 400,000,000 shares -
   outstanding 137,215,462 shares                                  $     1,372   $     1,372
   Other paid-in capital, principally premium on
     common stock                                                    1,582,836     1,582,938
   Retained earnings                                                 1,387,312     1,434,658
                                                                   -----------   -----------
         Total common stockholders' equity                           2,971,520     3,018,968
   Preferred stock not subject to mandatory redemption                 235,197       235,197
Long-term debt                                                       2,534,136     2,506,068
                                                                   -----------   -----------
         Total capitalization                                        5,740,853     5,760,233
                                                                   -----------   -----------
Minority interest in consolidated subsidiary                             3,534         3,534
Current liabilities:
   Current maturity of long-term debt                                   45,131        52,241
   Short-term debt                                                     112,129        86,266
   Accounts and wages payable                                          148,610       293,391
   Accumulated deferred income taxes                                    42,700        35,809
   Taxes accrued                                                       169,267       110,566
   Other                                                               202,770       168,727
                                                                   -----------   -----------
         Total current liabilities                                     720,607       747,000
                                                                   -----------   -----------
Accumulated deferred income taxes                                    1,548,297     1,556,981
Accumulated deferred investment tax credits                            188,051       190,260
Regulatory liability                                                   218,094       224,225
Other deferred credits and liabilities                                 377,866       345,314
                                                                   -----------   -----------
Total Capital and Liabilities                                      $ 8,797,302   $ 8,827,547
                                                                   ===========   ===========

                                       6




                               AMEREN CORPORATION
                        CONSOLIDATED STATEMENT OF INCOME
                                    UNAUDITED
           (Thousands of Dollars, Except Shares and Per Share Amounts)




                                                                     Three Months Ended              Twelve Months Ended
                                                                          March 31,                        March 31,
                                                               ----------------------------         ------------------------
                                                                    1998             1997            1998            1997
                                                                    ----             ----            ----            ----

                                                                                                  
 OPERATING REVENUES:
    Electric                                                $     606,100    $     648,783    $   3,021,494    $   3,044,706
    Gas                                                            92,338          107,248          234,905          252,694
    Other                                                           2,372            3,632           11,291           13,351
                                                            -------------    -------------    -------------    -------------
       Total operating revenues                                   700,810          759,663        3,267,690        3,310,751

 OPERATING EXPENSES:
    Operations
       Fuel and purchased power                                   164,905          202,640          798,710          864,435
       Gas                                                         52,204           67,838          145,045          163,092
       Other                                                      146,755          139,732          592,237          554,860
                                                            -------------    -------------    -------------    -------------
                                                                  363,864          410,210        1,535,992        1,582,387
    Maintenance                                                    65,003           67,539          307,705          305,857
    Depreciation and amortization                                  86,854           86,512          346,342          342,709
    Income taxes                                                   29,911           32,844          231,246          242,222
    Other taxes                                                    64,746           67,097          269,360          272,583
                                                            -------------    -------------    -------------    -------------
       Total operating expenses                                   610,378          664,202        2,690,645        2,745,758

 OPERATING INCOME                                                  90,432           95,461          577,045          564,993

 OTHER INCOME AND DEDUCTIONS:
    Allowance for equity funds used during
       construction                                                 1,063            1,094            5,213            6,251
    Miscellaneous, net                                             (3,146)          (4,092)          (9,398)         (22,970)
                                                            -------------    -------------    -------------    -------------
       Total other income and deductions                           (2,083)          (2,998)          (4,185)         (16,719)

 INCOME BEFORE INTEREST CHARGES
 AND PREFERRED DIVIDENDS                                           88,349           92,463          572,860          548,274

 INTEREST CHARGES AND PREFERRED DIVIDENDS:
    Interest                                                       47,495           46,071          186,792          181,253
    Allowance for borrowed funds used during construction          (2,261)          (1,702)          (8,021)          (7,530)
    Preferred dividends of subsidiaries                             3,188            3,117           12,603           15,836
                                                            -------------    -------------    -------------    -------------
       Net interest charges and preferred dividends                48,422           47,486          191,374          189,559

 INCOME BEFORE EXTRAORDINARY CHARGE                                39,927           44,977          381,486          358,715
                                                            -------------    -------------    -------------    -------------

 EXTRAORDINARY CHARGE (NET OF
 INCOME TAXES)                                                       --               --            (51,820)            --
                                                            -------------    -------------    -------------    -------------

 NET INCOME                                                 $      39,927    $      44,977    $     329,666    $     358,715
                                                            =============    =============    =============    =============

 EARNINGS PER COMMON SHARE - BASIC
 AND DILUTED (Based on average shares outstanding)
     Income before extraordinary charge                     $        0.29    $        0.33    $        2.78    $        2.62
     Extraordinary charge                                            --               --              (0.38)            --
                                                            -------------    -------------    -------------    -------------
     Net income                                             $        0.29    $        0.33    $        2.40    $        2.62
                                                            =============    =============    =============    =============

AVERAGE COMMON SHARES OUTSTANDING                             137,215,462      137,215,462      137,215,462      137,215,462
                                                            =============    =============    =============    =============


                                       7






                               AMEREN CORPORATION
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                                    UNAUDITED
                             (Thousands of Dollars)




                                                          Three Months Ended
                                                              March 31,
                                                       ---------------------
                                                           1998         1997
                                                       ---------    --------
                                                                
Cash Flows From Operating:
   Net income                                          $  39,927    $  44,977
   Adjustments to reconcile net income to net cash
      provided by operating activities:
        Depreciation and amortization                     84,463       85,100
        Amortization of nuclear fuel                       9,617        9,834
        Allowance for funds used during construction      (3,324)      (2,796)
        Deferred income taxes, net                        (6,830)         249
        Deferred investment tax credits, net              (2,209)      (2,376)
        Changes in assets and liabilities:
           Receivables, net                               52,331       57,287
           Materials and supplies                         (5,282)      10,550
           Accounts and wages payable                   (144,781)    (113,699)
           Taxes accrued                                  58,701       55,777
           Other, net                                     55,664      (79,250)
                                                       ---------    ---------
Net cash provided by operating activities                138,277       65,653

Cash Flows From Investing:
   Construction expenditures                             (64,946)     (91,986)
   Allowance for funds used during construction            3,324        2,796
   Nuclear fuel expenditures                              (4,422)      (3,722)
   Other                                                   4,410       (2,520)
                                                       ---------    ---------
Net cash used in investing activities                    (61,634)     (95,432)

Cash Flows From Financing:
   Dividends on common stock                             (87,132)     (83,813)
   Redemptions -
      Nuclear fuel lease                                 (10,407)      (4,615)
      Short-term debt                                       --        (16,743)
      Long-term debt                                     (35,000)     (40,000)
      Preferred stock                                       --        (63,924)
   Issuances -
      Nuclear fuel lease                                   1,161       11,910
      Short-term debt                                     25,863       22,600
      Long-term debt                                      65,000      230,000
                                                       ---------    ---------
Net cash provided by (used in) financing activities      (40,515)      55,415

Net increase in cash and cash equivalents                 36,128       25,636
Cash and cash equivalents at beginning of year             9,696       11,899
                                                       ---------    ---------
Cash and cash equivalents at end of period             $  45,824    $  37,535
                                                       =========    =========

Cash paid during the periods:
   Interest (net of amount capitalized)                $  29,319    $  28,682
   Income taxes, net                                   $  (1,675)   $   3,101


                                       8








AMEREN CORPORATION
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
MARCH  31, 1998

Note 1 - Effective  December  31,  1997,  following  the receipt of all required
state and federal  regulatory  approvals,  Union Electric Company (AmerenUE) and
CIPSCO  Incorporated  (CIPSCO) combined to form Ameren Corporation  (Ameren)(the
Merger).  The  accompanying  consolidated  financial  statements  (the financial
statements)  reflect the accounting for the Merger as a pooling of interests and
are  presented  as if the  companies  were  combined as of the  earliest  period
presented.  However, the financial information is not necessarily  indicative of
the  results of  operations,  financial  position  or cash flows that would have
occurred had the Merger been  consummated  for the periods for which it is given
effect,  nor is it  necessarily  indicative  of future  results  of  operations,
financial  position or cash flows.  The outstanding  preferred stock of AmerenUE
and Central  Illinois  Public  Service  Company  (AmerenCIPS),  a subsidiary  of
CIPSCO, were not affected by the Merger.

The  accompanying  financial  statements  include the accounts of Ameren and its
consolidated  subsidiaries  (collectively the Registrant).  All subsidiaries for
which the  Registrant  owns directly or  indirectly  more than 50% of the voting
stock are included as  consolidated  subsidiaries.  Ameren's  primary  operating
companies,  AmerenUE and AmerenCIPS,  are engaged principally in the generation,
transmission,  distribution  and  sale of  electric  energy  and  the  purchase,
distribution,  transportation  and sale of natural gas in the states of Missouri
and Illinois.  The Registrant  also has a  non-regulated  investing  subsidiary,
CIPSCO Investment Company (CIC), and a non-utility energy marketing  subsidiary,
Ameren Energy. The Registrant has a 60% interest in Electric Energy, Inc. (EEI).
EEI owns and  operates  an  electric  generating  and  transmission  facility in
Illinois that supplies  electric power primarily to a uranium  enrichment  plant
located in Paducah, Kentucky.

All significant intercompany balances and transactions have been eliminated from
the consolidated financial statements.

Note 2 - Financial statement note disclosures, normally included in consolidated
financial  statements  prepared in conformity with generally accepted accounting
principles,  have  been  omitted  in this Form  10-Q  pursuant  to the Rules and
Regulations of the Securities and Exchange  Commission.  However, in the opinion
of the Registrant,  the disclosures  contained in this Form 10-Q are adequate to
make the  information  presented  not  misleading.  See  Notes  to  Consolidated
Financial  Statements included in the 1997 Form 10-K for information relevant to
the consolidated  financial  statements  contained in this Form 10-Q,  including
information as to the significant accounting policies of the Registrant.

Note 3 - In the  opinion of the  Registrant,  the interim  financial  statements
filed as part of this Form 10-Q  reflect  all  adjustments,  consisting  only of
normal recurring adjustments,  necessary for a fair statement of the results for
the periods presented.  The Registrant's  consolidated financial statements were
prepared to permit the  information  required  in the  Financial  Data  Schedule
(FDS),  Exhibit 27, to be directly extracted from the filed statements.  The FDS
amounts  correspond  to or are  calculable  from  the  amounts  reported  in the
consolidated financial statements or notes thereto.

Note 4 - Due to the  effect of  weather  on sales and  other  factors  which are
characteristic of public utility  operations,  financial results for the periods
ended March 31, 1998 and 1997 are not  necessarily  indicative of trends for any
three-month or twelve-month period.

Note 5 - On July 21,  1995,  the  Missouri  Public  Service  Commission  (MoPSC)
approved  an  agreement  involving   AmerenUE's  Missouri  electric  rates.  The
Agreement included a three-year  experimental  alternative  regulation plan that
provides that earnings in excess of a 12.61 percent  regulatory return on equity
(ROE) will be shared equally  between  customers and  shareholders  and earnings
above 14 percent ROE will be credited to  customers.  The formula for  computing
the credit uses  twelve-month  results ending June 30, rather than calendar year
earnings.  During the three months ended March 31, 1998, the Registrant recorded
an estimated $10 million credit for the third year of the plan compared to a $20
million credit recorded for 1997. This credit,  which the Registrant  expects to
pay to Missouri  customers  later this year,  was  reflected  as a reduction  in
electric  revenues.  The  final  amount of the  credit  will  depend on  several
factors,  including the Registrant's  earnings for the 12 months ending June 30,
1998.

A new three-year  experimental  alternative  regulation plan was included in the
joint  agreement  approved by the MoPSC in its February 1997 order approving the
Merger.  Like the current plan, the new plan requires that earnings over a 12.61
percent ROE up to a 14 percent ROE will be shared equally between  customers and
stockholders.  The new three-year  plan will also return to customers 90 percent
of all earnings above a 14 percent ROE up to a 16 percent ROE.  Earnings above a
16 percent ROE would be credited entirely to customers.

Note 6 - Statement of Financial  Accounting Standards (SFAS) No. 130, "Reporting
Comprehensive  Income"  became  effective on January 1, 1998.  SFAS 130 requires
that all items that are required to be recognized under accounting  standards as

                                       9


components of comprehensive  income be reported in the financial statements with
the same prominence as other financial  statement  components.  Adoption of SFAS
130 did not  have a  material  effect  on the  financial  position,  results  of
operations,   liquidity  or  presentation   of  financial   information  of  the
Registrant.

Note 7 - Certain  reclassifications were made to prior-year financial statements
to conform with current-period presentation.

                                       10





                           PART II. OTHER INFORMATION


ITEM 4.      SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

             At the annual meeting of  stockholders  of the  Registrant  held on
April 28, 1998,  the following  matters were presented to the meeting for a vote
and the results of such voting are as follows:



            Item (1)      Election of Directors.


                                                                                                      Non-Voted
                   Name                                         For                Withheld           Brokers
                                                                                                
        William E. Cornelius....................            116,430,967            3,630,427              0
        Clifford L. Greenwalt...................            116,197,459            3,863,935              0
        Thomas A. Hays..........................            116,464,635            3,596,759              0
        Richard A. Liddy........................            116,526,980            3,534,414              0
        Gordon R. Lohman........................            116,336,620            3,724,774              0
        Richard A. Lumpkin......................            116,530,171            3,531,223              0
        John Peters MacCarthy...................            116,541,375            3,520,019              0
        Hanne M. Merriman.......................            115,912,698            4,148,696              0
        Paul L. Miller, Jr......................            116,553,412            3,507,982              0
        Charles W. Mueller......................            116,517,878            3,543,516              0
        Robert H. Quenon........................            116,396,595            3,664,799              0
        Harvey Saligman.........................            116,435,105            3,626,289              0
        Charles J. Schukai......................            116,563,157            3,498,237              0
        Janet McAfee Weakley....................            116,313,750            3,747,644              0
        James W. Wogsland.......................            116,162,903            3,898,491              0





            Item (2)  Board Proposal re Long-Term Incentive Plan.


                                                                                         Non-Voted
                   For                     Against                 Abstain                Brokers *
                                                                                  
                106,175,592              10,612,259               3,271,412                 900





            Item (3)  Stockholder Proposal re Report on Callaway Plant
            Decommissioning Cost.


                                                                                         Non-Voted
                   For                     Against                 Abstain                Broker *
                                                                              
                7,528,171                85,696,831               6,961,975              19,874,186
<FN>
* Broker shares included in the quorum but not voting on the items.
</FN>



                                       11









ITEM 6.        EXHIBITS AND REPORTS ON FORM 8-K

               (a)    Exhibits.

                      Exhibit 27                -   Financial Data Schedule.

               (b) Reports on Form 8-K. During the quarter, the Registrant filed
a report on Form 8-K dated  January  20,  1998  reporting  the impact of utility
restructuring  legislation in Illinois and the expectation of lower earnings for
1998.  Further  by Form 8-K  dated  March  13,  1998,  the  Registrant  reported
consolidated revenues and net income for January 1998.




                                   SIGNATURES

               Pursuant to the  requirements  of the Securities  Exchange Act of
1934,  the  Registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.


                                                AMEREN CORPORATION
                                                   (Registrant)



May 13, 1998                              By        /s/ Donald E. Brandt
                                             ---------------------------
                                                        Donald E. Brandt
                                                 Senior Vice President, Finance


                                       12