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Ameren NEWS RELEASE 1901 Chouteau Avenue : St. Louis , MO 63103 : Ameren.com Contacts : Media Anthony Paraino 314.554.2182 aparaino@ameren.com For Immediate Release • • Analysts Andrew Kirk 314.554.3942 akirk@ameren.com Investors Investor Services 800.255.2237 invest@ameren.com Ameren Announces First Quarter 2021 Results First Quarter Diluted Earnings Per Share were $ 0.91 in 2021 vs. $ 0.59 in 2020 Guidance Range for 2021 Affirmed at $ 3.65 to $ 3.85 per Diluted Share ST . LOUIS ( May 10 , 2021 ) - Ameren Corporation ( NYSE : AEE ) today announced first quarter 2021 net income attributable to common shareholders of $ 233 million , or $ 0.91 per diluted share , compared to first quarter 2020 net income attributable to common shareholders of $ 146 million , or $ 0.59 per diluted share . First quarter 2021 results reflected earnings on increased infrastructure investments made across all business segments driven by solid execution of the company's strategy . Earnings were positively impacted by new Ameren Missouri electric service rates effective April 1 , 2020 , and higher Ameren Missouri electric retail sales driven by near - normal winter temperatures in the first quarter of 2021 compared to milder - than - normal winter temperatures in the year - ago period . Lower Ameren Missouri other operations and maintenance expenses also increased earnings , primarily driven by the absence of unfavorable market returns that occurred in the first quarter of 2020 on the cash surrender value of company - owned life insurance , as well as disciplined cost management . Ameren Illinois Natural Gas Distribution earnings increased due to a change in rate design and higher delivery service rates effective in late January 2021. Earnings were positively impacted by a higher allowed return on equity at Ameren Illinois Electric Distribution due to a higher projected average 30 - year U.S. Treasury bond yield in 2021 compared to 2020 . Earnings also benefited from the timing of income tax expense at Ameren Missouri and Ameren Parent , which is not expected to impact full - year results . Earnings were negatively impacted at Ameren Transmission by a 2021 FERC order addressing the historical recovery of materials and supplies inventories . Finally , 2021 earnings per share reflected higher weighted - average basic common shares outstanding and the effect of dilution . " We are executing on all elements of our strategy , including significant investments in energy infrastructure and disciplined cost management across all of our business segments , which is delivering significant value to our customers , " said Warner L. Baxter , chairman , president and chief executive officer of Ameren Corporation . " We remain on track to deliver within our 2021 earnings per share guidance range of $ 3.65 to $ 3.85 . " Page 1 of 5