Exhibit 99.1 [GRAPHIC OMITTED][GRAPHIC OMITTED] One Ameren Plaza 1901 Chouteau Avenue St. Louis, MO 63103 Contact: Media Analysts Investors Tim Fox Bruce Steinke Investor Services (314) 554-3120 (314) 554-2574 invest@ameren.com tfox2@ameren.com bsteinke@ameren.com FOR IMMEDIATE RELEASE - --------------------- AMEREN REPORTS THIRD QUARTER 2003 EARNINGS St. Louis, Mo., Oct. 24, 2003---Ameren Corporation (NYSE: AEE) today announced 2003 third quarter net income of $275 million, or $1.70 per share, compared to net income of $240 million, or $1.64 per share ($1.63 diluted), in the third quarter of 2002. Net income in the third quarter of 2003 included an after-tax gain of $31 million, or 19 cents per share, related to the settlement of a dispute over certain mine reclamation issues with a coal supplier. Excluding this item, third quarter net income was $244 million, or $1.51 per share. Net income for the first nine months of 2003 was $486 million, or $3.02 per share, compared to $414 million, or $2.88 per share ($2.87 diluted), in the first nine months of 2002. The company recorded an after-tax gain of $18 million, or 11 cents per share, in the first quarter of 2003, due to the adoption of a new accounting standard related to the recognition of asset retirement obligations. Excluding the gains on the adoption of the new accounting standard and the coal mine reclamation settlement, net income for the first nine months of 2003 was $437 million, or $2.72 per share. "Once again, we delivered solid earnings in the third quarter of 2003 despite milder summer weather conditions," said Charles W. Mueller, chairman and chief executive officer of Ameren Corporation. "Our focus on asset optimization and cost control continues to reap benefits for all of our stakeholders." Gary L. Rainwater, president and chief operating officer of Ameren, added, "During the quarter, weather conditions were considerably cooler than in 2002, which reduced our earnings by 25 to 30 cents per share compared to last year. In addition, the second phase of electric rate reductions in our Missouri service territory reduced third quarter 2003 earnings by 5 cents per - more - Add One share compared to the prior year. However, the good performance of the company's generating plants, higher power prices, lower expenses incurred in our pre-CILCORP acquisition operations and organic growth significantly offset the impact of weather and rate reductions." Electric revenues in the third quarter of 2003 increased $131 million, as compared to 2002. The acquisition of CILCORP Inc. (including its utility subsidiary that is now operating as AmerenCILCO), which increased electric revenues by $168 million, and higher interchange power revenues, which increased by $15 million, were the key factors behind the quarter's increased revenues. These increases were partially offset by lower revenues from native load customers due to cooler summer weather in 2003 compared to 2002, as well as an incremental annual electric rate decrease in our Missouri service territory of $30 million that went into effect in April 2003. In the company's pre-CILCORP acquisition service area, weather-sensitive residential and commercial electric kilowatthour sales declined 7 percent in the third quarter of 2003, as compared to the third quarter of 2002. However, industrial electric kilowatthour sales increased 1 percent in the company's pre-acquisition service territory. Earnings from interchange power sales by AmerenEnergy, Inc. on behalf of AmerenUE and AmerenEnergy Generating Company were 10 cents per share in the third quarter of 2003, up approximately 4 cents per share over the same period in 2002. This increase in earnings was due to higher power prices, greater availability of the company's low-cost generating plants and reduced demand from weather-sensitive native load customers. Other operations and maintenance expenses increased $24 million in the third quarter of 2003, compared to 2002. Increased expenses due to the addition of CILCORP and rising employee benefit costs were partially offset by lower labor costs resulting from the voluntary retirement program implemented at Ameren in early 2003 and lower generating plant maintenance costs. Third quarter 2003 earnings per share were also unfavorably impacted compared to 2002 by higher depreciation expenses and financing costs, as well as a greater number of common shares outstanding. Commenting on the CILCORP acquisition, Rainwater added, "Our company remains very focused on the timely integration of AmerenCILCO, which continues to proceed on plan. In August, we completed the integration of Ameren and AmerenCILCO financial systems, and we expect the integration of operational systems to be completed by year-end." - more - Add Two During the third quarter of 2003, the CILCORP acquisition was accretive to earnings by approximately 2 cents per share, consistent with the company's expectations. The company believes the CILCORP acquisition will be accretive to earnings in its first full year of operations, assuming normal weather conditions. Ameren also announced today that it was narrowing its 2003 earnings guidance range to between $2.90 and $3.00 per share, within its original 2003 range of $2.80 to $3.05 per share. This estimate excludes the gains, discussed above, of 11 cents per share related to the adoption of the new accounting standard and 19 cents per share for the coal mine reclamation settlement. The company's guidance is subject to, among other things, plant operations, timely integration of AmerenCILCO, weather conditions, energy market and economic conditions and other risks and uncertainties outlined in the company's Forward-Looking Statements. Ameren will conduct a conference call for financial analysts at 9:00 a.m. (Central Time) on Friday, Oct. 24, to discuss third quarter 2003 earnings. Investors, the news media and the public may listen to a live Internet broadcast of the Ameren analyst call at www.ameren.com by clicking on "Third Quarter Earnings Conference Call," then the appropriate audio link. The analyst call will also be available for replay on the Internet for one year. Telephone playback of the conference call will also be available beginning at 12:00 p.m. (Central Time), Oct. 24, until Oct. 31 by dialing, U.S. (800) 428-6051; international (973) 709-2089, and entering the number: 308455. Ameren will also conduct a live Internet broadcast at 8:45 a.m. (Central Time) on Tuesday, Oct. 28 of a management presentation at the Edison Electric Institute Financial Conference. The webcast can be accessed at www.ameren.com by clicking on "Ameren Corporation at 38th EEI Financial Conference," then the appropriate audio link. With assets of $13.5 billion, Ameren owns a diverse mix of electric generating plants strategically located in its Midwest market with a capacity of more than 14,500 megawatts. Ameren serves 1.7 million electric customers and 500,000 natural gas customers in a 49,000 square-mile area of Missouri and Illinois. Forward-Looking Statements - -------------------------- Statements made in this release, 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 company is providing this cautionary statement to identify important factors that could cause actual results to differ materially from those anticipated. The following factors, in addition to those discussed elsewhere in this release and in past and subsequent securities filings, could cause actual results to differ materially from management expectations as suggested by such "forward-looking" statements: o the effects of the stipulation and agreement relating to the AmerenUE Missouri electric excess earnings complaint case and other regulatory actions, including changes in regulatory policy; o changes in laws and other governmental actions, including monetary and fiscal policy; o the impact on the company of current regulations related to the opportunity for customers to choose alternative energy suppliers in Illinois; o the effects of increased competition in the future due to, among other things, deregulation of certain aspects of the company's business at both the state and federal levels; o the effects of participation in a Federal Energy Regulatory Commission-approved regional transmission organization, including activities associated with the Midwest Independent System Operator; o the availability of fuel for the production of electricity, such as coal and natural gas, and purchased power and natural gas for distribution, and the level and volatility of future market prices for such commodities, including the ability to recover any increased costs; o the use of financial and derivative instruments; o average rates for electricity in the Midwest; o business and economic conditions; o the impact of the adoption of new accounting standards and the application of appropriate technical accounting rules and guidance; o interest rates and the availability of capital; o actions of ratings agencies and the effects of such actions; o weather conditions; o generation plant construction, installation and performance; o operation of nuclear power facilities and decommissioning costs; o the effects of strategic initiatives, including acquisitions and divestitures; o the impact of current environmental regulations on utilities and generating companies and the expectation that more stringent requirements will be introduced over time, which could potentially have a negative financial effect; o future wages and employee benefits costs, including changes in returns on benefit plan assets; o disruptions of the capital markets or other events making the company's access to necessary capital more difficult or costly; o competition from other generating facilities, including new facilities that may be developed; o difficulties in integrating AmerenCILCO with the company's other businesses; o changes in the coal markets, environmental laws or regulations, or other factors adversely impacting synergy assumptions in connection with the CILCORP Inc. acquisition; o cost and availability of transmission capacity for the energy generated by the company's generating facilities or required to satisfy energy sales made by the company; and o legal and administrative proceedings. # # # AMEREN CORPORATION (AEE) CONSOLIDATED OPERATING STATISTICS Three Months Ended Nine Months Ended September 30, September 30, ----------------------------- ---------------------------- 2003 2002 2003 2002 ------------ ------------ ------------ ------------ Electric Sales - KWH (in millions): Residential 5,488 5,229 13,706 12,859 Commercial 5,256 5,024 14,172 13,233 Industrial 4,743 3,262 13,175 9,448 Wholesale 2,418 2,507 6,671 6,657 Other 73 69 225 204 ------------ ------------ ------------- ------------- Native 17,978 16,091 47,949 42,401 Interchange sales 2,145 1,467 6,566 6,555 EEI 1,848 1,765 4,073 5,128 ------------ ------------ ------------- ------------- Total 21,971 19,323 58,588 54,084 Electric Revenues - (in millions): Residential $ 452 $ 437 $ 1,007 $ 974 Commercial 362 345 880 824 Industrial 221 157 558 400 Wholesale 87 86 228 219 Other 6 6 19 18 ------------ ------------ ------------- ------------- Native 1,128 1,031 2,692 2,435 Interchange sales 63 40 221 157 EEI 51 48 111 156 Other 24 16 66 64 ------------ ------------ ------------- ------------- Total 1,266 1,135 3,090 2,812 Power Supply (%): Fossil 77.0 78.9 77.2 74.3 Nuclear 11.0 12.4 11.9 12.4 Hydro 0.6 1.1 0.9 1.7 Purchased 11.4 7.6 10.0 11.6 Fuel Cost per KWH (cents) 1.166 1.104 1.081 1.027 Gas Sales - MMBTU (in thousands) 6,983 3,040 50,745 25,818 September 30, December 31, 2003 2002 -------------- ------------- Common Stock: Shares outstanding (in millions) 162.3 154.1 Book value per share $26.70 $24.26 Capitalization Ratios: Common equity 48.1% 51.6% Preferred stock 2.4% 2.6% Debt, net of cash 49.5% 45.8% AMEREN CORPORATION (AEE) CONSOLIDATED BALANCE SHEET (Unaudited, in millions) September 30, December 31, 2003 2002 - --------------------------------------------------------------------------------------------------------------------- ASSETS - --------------------------------------------------------------------------------------------------------------------- Current Assets: Cash and cash equivalents $ 100 $ 628 Accounts receivable - trade 362 266 Unbilled revenue 184 176 Miscellaneous accounts and notes receivable 131 44 Materials and supplies, at average cost 476 299 Other current assets 57 39 ------------------- --------------- Total current assets 1,310 1,452 ------------------- --------------- Property and Plant, net 10,152 8,840 Investments and Other Non-Current Assets: Investments 166 38 Nuclear decommissioning trust fund 195 172 Goodwill and other intangibles, net 630 - Other assets 317 307 ------------------- --------------- Total investments and other assets 1,308 517 ------------------- --------------- Regulatory Assets 767 690 - -------------------------------------------------------------------------------------------------------------------- TOTAL ASSETS $ 13,537 $ 11,499 ==================================================================================================================== LIABILITIES AND STOCKHOLDERS' EQUITY - -------------------------------------------------------------------------------------------------------------------- Current Liabilities: Current maturities of long-term debt $ 499 $ 339 Short-term debt 3 271 Accounts and wages payable 275 369 Asset retirement obligations 4 - Taxes accrued 231 45 Other current liabilities 237 177 ------------------- --------------- Total current liabilities 1,249 1,201 ------------------- --------------- Long-term Debt, Net 4,046 3,433 Preferred Stock Subject to Mandatory Redemption 21 - Deferred Credits and Other Non-Current Liabilities: Accumulated deferred income taxes, net 1,993 1,707 Accumulated deferred investment tax credits 153 149 Regulatory liabilities 133 136 Asset retirement obligations 408 174 Accrued pension liabilities 527 377 Other deferred credits and liabilities 439 272 ------------------- --------------- Total deferred credits and other liabilities 3,653 2,815 ------------------- --------------- Preferred Stock Not Subject to Mandatory Redemption 213 193 Minority Interest in Consolidated Subsidiaries 21 15 Stockholders' Equity: Common stock 2 2 Other paid-in capital, principally premium on common stock 2,528 2,203 Retained earnings 1,917 1,739 Accumulated other comprehensive income (loss) (103) (93) Other (10) (9) ------------------- --------------- Total stockholders' equity 4,334 3,842 - --------------------------------------------------------------------------------------------------- --------------- TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 13,537 $ 11,499 ==================================================================================================================== AMEREN CORPORATION (AEE) CONSOLIDATED STATEMENT OF INCOME (Unaudited) (In millions, except per share amounts) Three Months Ended Nine Months Ended September 30, September 30, - ------------------------------------------------------------------------------------------------------------------------------------ 2003 2002 2003 2002 - ------------------------------------------------------------------------------------------------------------------------------------ Operating Revenues: - ------------------------------------------------------------------------------------------------------------------------------------ Electric $ 1,266 $ 1,135 $ 3,090 $ 2,812 Gas 82 30 450 202 Other 2 1 6 4 -------- -------- -------- -------- Total operating revenues 1,350 1,166 3,546 3,018 Operating Expenses: - ------------------------------------------------------------------------------------------------------------------------------------ Fuel and purchased power 330 248 793 655 Gas purchased for resale 54 17 326 129 Other operations and maintenance 302 278 901 835 Coal contract settlement (51) - (51) - Depreciation and amortization 132 108 388 321 Taxes other than income taxes 83 74 238 211 -------- -------- -------- -------- Total operating expenses 850 725 2,595 2,151 -------- -------- -------- -------- Operating Income 500 441 951 867 - ------------------------------------------------------------------------------------------------------------------------------------ Other Income and (Deductions): - ------------------------------------------------------------------------------------------------------------------------------------ Allowance for equity funds used during construction 1 1 2 3 Miscellaneous, net - Miscellaneous income 3 5 14 13 Miscellaneous expense (3) (3) (14) (46) -------- -------- -------- -------- Total other income and (deductions) 1 3 2 (30) -------- -------- -------- -------- Interest Charges and Preferred Dividends: - ------------------------------------------------------------------------------------------------------------------------------------ Interest 70 57 208 162 Allowance for borrowed funds used during construction (1) (1) (4) (4) Preferred dividends of subsidiaries 3 3 8 9 -------- -------- -------- -------- Net interest charges and preferred dividends 72 59 212 167 -------- -------- -------- -------- Income Before Income Taxes and Cumulative Effect of Change in Accounting Principle 429 385 741 670 - ------------------------------------------------------------------------------------------------------------------------------------ Income Taxes 154 145 273 256 -------- -------- -------- -------- Income Before Cumulative Effect of Change in Accounting Principle 275 240 468 414 - ------------------------------------------------------------------------------------------------------------------------------------ Cumulative Effect of Change in Accounting Principle, Net of Income Taxes - - 18 - - ------------------------------------------------------------------------------------------------------------------------------------ Net Income $ 275 $ 240 $ 486 $ 414 ==================================================================================================================================== Earnings per Common Share - Basic: Income before cumulative effect of change in accounting principle $ 1.70 $ 1.64 $ 2.91 $ 2.88 Cumulative effect of change in accounting principle, net of income taxes - - 0.11 - -------- -------- -------- -------- Net income $ 1.70 $ 1.64 $ 3.02 $ 2.88 ==================================================================================================================================== Earnings per Common Share - Diluted: Income before cumulative effect of change in accounting principle $ 1.70 $ 1.63 $ 2.91 $ 2.87 Cumulative effect of change in accounting principle, net of income taxes - - 0.11 - -------- -------- -------- -------- Net income $ 1.70 $ 1.63 $ 3.02 $ 2.87 ==================================================================================================================================== Average Common Shares Outstanding 161.8 146.7 160.7 143.6 ==================================================================================================================================== AMEREN CORPORATION (AEE) CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited, in millions) Nine Months Ended September 30, ---------------------- 2003 2002 - ---------------------------------------------------------------------------------------------------------------------- Cash Flows From Operating Activities: - ---------------------------------------------------------------------------------------------------------------------- Net Income $ 486 $ 414 Adjustments to reconcile net income to net cash provided by operating activities: Cumulative effect of change in accounting principle (18) - Depreciation and amortization 388 321 Amortization of nuclear fuel 25 25 Amortization of debt issuance costs and premium/discounts 8 6 Allowance for funds used during construction (6) (7) Deferred income taxes, net 30 11 Deferred investment tax credits, net (9) (6) Coal contract settlement (45) - Other (8) 5 Changes in assets and liabilities, excluding the effects of the acquisitions: Receivables, net 17 (49) Materials and supplies (69) 15 Accounts and wages payable (171) (217) Taxes accrued 167 214 Assets, other (2) (16) Liabilities, other 59 17 ------ ------ Net cash provided by operating activities 852 733 - ---------------------------------------------------------------------------------------------------------------------- Cash Flows From Investing Activities: - ---------------------------------------------------------------------------------------------------------------------- Construction expenditures (457) (565) Acquisitions, net of cash acquired (489) - Allowance for funds used during construction 6 7 Nuclear fuel expenditures (2) (25) Other 4 1 ------ ------ Net cash used in investing activities (938) (582) - ---------------------------------------------------------------------------------------------------------------------- Cash Flows From Financing Activities: - ---------------------------------------------------------------------------------------------------------------------- Dividends on common stock (308) (279) Capital issuance costs (13) (35) Redemptions - Nuclear fuel lease (38) - Short-term debt (268) (635) Long-term debt (648) (158) Preferred stock (1) (41) Issuances - Common stock 336 635 Nuclear fuel lease - 31 Long-term debt 498 893 ------ ------ Net cash provided by (used in) financing activities (442) 411 - ---------------------------------------------------------------------------------------------------------------------- Net Change In Cash and Cash Equivalents (528) 562 Cash and Cash Equivalents at Beginning of Year 628 67 - ---------------------------------------------------------------------------------------------------------------------- Cash and Cash Equivalents at End of Period $ 100 $ 629 =======================================================================================================================