Company:  AMEREN CORP (AEE)
Form Type:  10-Q
Filing Date:  5/8/2009 
CIK:  0001002910 
Address:  1901 CHOUTEAU AVE
MC 1370 
City, State, Zip:  ST LOUIS, Missouri 63166-6149 
Telephone:  314-621-3222 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$25.28   		Change: 
-0.07 (-0.28%)  
Trade Time: 
Nov 20   		Market Cap: 
$5.99B
Description of Business
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  FORM 10-Q
    PART I. FINANCIAL INFORMATION
      ITEM 1. FINANCIAL STATEMENTS.
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        INCOME STATEMENT
        BALANCE SHEET
        CASH FLOW
        COMBINED NOTES TO FINANCIAL STATEMENTS
          INCOME STATEMENT
          INCOME STATEMENT
      ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 4 and ITEM 4T. CONTROLS AND PROCEDURES.
    PART II. OTHER INFORMATION
      ITEM 1. LEGAL PROCEEDINGS.
      ITEM 1A. RISK FACTORS.
      ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF ...
      ITEM 6. EXHIBITS.
    SIGNATURES
  EXHIBIT 12.1
    RATIO COMPUTATION
  EXHIBIT 12.2
    RATIO COMPUTATION
  EXHIBIT 12.3
    RATIO COMPUTATION
  EXHIBIT 12.4
    RATIO COMPUTATION
  EXHIBIT 12.5
    RATIO COMPUTATION
  EXHIBIT 12.6
    RATIO COMPUTATION
  EXHIBIT 12.7
    RATIO COMPUTATION
  EXHIBIT 31.1
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.2
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.3
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.4
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.5
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.6
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.7
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.8
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.9
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.10
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.11
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.12
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.13
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 31.14
    RULE 13a-14(a)/15d-14(a) CERTIFICATION
  EXHIBIT 32.1
    SECTION 1350 CERTIFICATION OF
  EXHIBIT 32.2
    SECTION 1350 CERTIFICATION OF
  EXHIBIT 32.3
    SECTION 1350 CERTIFICATION OF
  EXHIBIT 32.4
    SECTION 1350 CERTIFICATION OF
  EXHIBIT 32.5
    SECTION 1350 CERTIFICATION OF
  EXHIBIT 32.6
    SECTION 1350 CERTIFICATION OF
  EXHIBIT 32.7
    SECTION 1350 CERTIFICATION OF
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