Earnings Estimates

First Call Mean Earnings Estimates Fisc. YR ending: Dec - Last Changed:  11/16/09 YR Ending Q1 Mar Q2 Jun Q3 Sep Q4 Dec FISC YR Annual NUM Brokers Cal YR Annual NUM Brokers 2012         2.53 1 2.53 1 2011         2.37 2 2.37 2 2010 0.25 0.54 1.31   2.42 6 2.42 6 2009 0.54A 0.75A 1.16A 0.05 2.71 4 2.71 4 2008 0.64A 0.67A 1.17A 0.45A 2.95 9 2.95 9 2007 0.63A 0.69A 1.36A 0.61A 3.29 6 3.29 5 2006 0.34A 0.60A 1.42A 0.43A 2.79 6 2.79 6 2005 0.62A 0.93A 1.37A 0.21A 3.13 11 3.13 11 2004 0.55A 0.65A 1.20A 0.42A 2.82 10 2.82 10 2003 0.52A 0.68A 1.51A 0.24A 2.95 12 2.95 12 Mean Recommendation: 3.4 Mean Future 5 Year Growth Rate: 3

Disclaimer: Mean Earnings Estimates are calculated by First Call based on the earnings projections made by the analysts who cover Ameren Corporation. Please note that any opinions, estimates or forecasts regarding Ameren Corporation's performance made by these analysts (and therefore the Mean estimate numbers) are theirs alone and do not represent opinions, forecasts or predictions of Ameren Corporation or its management. Ameren Corporation does not by its reference above or distribution imply its endorsement of or concurrence with such information, conclusions or recommendations.