EX-99.1 6 d455552dex991.htm FORMULA FOR DETERMINING 2013 TARGET PERFORMANCE SHARE UNIT AWARDS Formula for Determining 2013 Target Performance Share Unit Awards

EXHIBIT 99.1

FORMULA FOR DETERMINING 2013 TARGET PERFORMANCE SHARE UNIT

AWARDS TO BE ISSUED TO NAMED EXECUTIVE OFFICERS

The target number of performance share units to be issued to each Named Executive Officer listed below for 2013 will be determined in accordance with the following formula:

 

2013 Target
Number PSU
Awards		   

 

=    

    Base Salary
as of 1/1/13		    x    Long-Term
Incentive Target
listed below
     

Average closing price of Ameren Corporation Common Stock on The New York Stock

Exchange for each trading day in December 2012

 

NAMED EXECUTIVE OFFICER

    LONG-TERM INCENTIVE
TARGET AS PERCENT OF BASE SALARY

Voss

    325%

Lyons

    175%

Baxter

    175%

Sullivan

    160%

Heflin

    150%