Transforming For Our Future

Focused on Delivering Affordable Service to Our Customers Residential rates since key legislative or regulatory enhancements Ameren Missouri Electric1 ~0.75% ¢/KWh CAGR 12.00 2017 to 2021 10.34 8.00 ¢/KWh Ameren Illinois Electric Distribution² Ameren Ameren Illinois Natural Gas Distribution 3 ~1.4% CAGR ~0.3% $/therm 12.00 CAGR 2012 to 2021 2011 to 2021 1.25 1.21 9.97 10.59 10.28 1.00 1.05 8.00 0.75 4.00 4.00 0.50 0.25 0.00 0.00 2017 2021 Under PISA Legislation 0.00 2012 2021 Under Performance-Based Ratemaking 2011 2021 Under Future Test Year Ratemaking 1 Average annual residential rates, excluding MEEIA rider, effective Apr. 1, 2017 and Dec. 31, 2021.2.85% CAGR rate cap utilizes a total rate for all classes as of Apr. 1, 2017, excluding the MEEIA rider, less ~3%, representing half the income tax rate reduction in 2018. 2 Average all-in residential rates for 12 months ended May 31. 3 Average all-in residential rates for 12 months ended Dec. 31. First Quarter 2022 Earnings | May 6, 2022 27

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