This document provides a summary of Ameren's Q1 2007 earnings and earnings guidance for 2007. Some key points: - Q1 2007 GAAP earnings per share were $0.59, excluding costs related to severe January 2007 storms. Non-GAAP earnings were $0.63 per share. - Factors that impacted Q1 2007 earnings both positively and negatively compared to Q1 2006 are listed, such as higher electric and gas margins but also higher fuel prices and labor costs. - 2007 earnings guidance on a non-GAAP basis is provided as $3.15-$3.60 per share, excluding costs from January 2007 storms and potential future charges. A reconciliation of the factors expected to