EX-32.1 16 ex32-1for10q.htm EXHIBIT 32.1 AMEREN PEO CERTIFICATION Exhibit 32.1 Ameren PEO Certification


Exhibit 32.1


SECTION 1350 CERTIFICATION
OF PRINCIPAL EXECUTIVE OFFICER
OF AMEREN CORPORATION
(required by Section 906 of the
Sarbanes-Oxley Act of 2002)


In connection with the report on Form 10-Q for the quarterly period ended June 30, 2005 of Ameren Corporation (the “Company”) as filed with the Securities and Exchange Commission on the date hereof (the "Form 10-Q"), I, Gary L. Rainwater, chief executive officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)  
The Form 10-Q fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2)  
The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.


Dated: August 9, 2005
     
   
 
 
 
 
 
 
  By:   /s/ Gary L. Rainwater
 
Gary L. Rainwater
 
Chairman, President and
Chief Executive Officer
(Principal Executive Officer)