Transforming For Our Future

Ameren Missouri Generation Transformation 1 Transition to a cleaner and more diverse portfolio in a responsible fashion Ameren 700 MW 2 2020 30 MW 2021 2022 2024 20 MW 900 MW/250 MW 2023 2025 2026 400 MW 300 MW/200 MW/ 300 MW 2027 2028 2029 2030 200 MW 200 MW 300 MW 2031 2032 2033 200 MW/300 MW/200 MW 300 MW/400 MW/200 MW 2034 2035 2036 2037 2038 2039 2040 2041 2042 800 MW 2043 2044 2045 2046 2047 2048 2049 2050 Meramec Energy Center RETIRED 827 MW Sioux Energy Center RETIRED 972 MW 50% CARBON EMISSIONS REDUCTION 3,4 Labadie Energy Center (2 units) RETIRED 1,186 MW Rush Island Energy Center RETIRED 1,178 MW Labadie Energy Center (2 units) RETIRED 1.186 MW Callaway Energy Center LICENSE EXPIRES-1.193 MW 85% CARBON EMISSIONS REDUCTION 3,4 Ameren Missouri filed its preferred Integrated Resource Plan with the MOPSC in Sep. 2020 Targets substantial reductions in carbon emissions 3,4 -50% by 2030, 85% by 2040 and net-zero by 2050 Advances retirement of coal-fired energy centers - - Sioux Energy Center from 2033 to 2028 and Rush Island Energy Center from 2045 to 2039 All coal-fired energy centers retired by 2042 NET-ZERO CARBON EMISSIONS 3,4 Adds 2,400 MWs of renewable generation by 2030, an investment opportunity of -$3.3 billion, and a total of 4,700 MWs by 2040, an investment opportunity of ~$7 billion Expect to seek an extension of operating license of our carbon-free Callaway Nuclear Energy Center beyond 2044 Continues robust, cost-effective customer energy efficiency and demand response programs Allows flexibility needed to take advantage of changes in technology, such as battery storage Expect to create thousands of new construction jobs, benefitting local economy, including diverse suppliers 1 Ameren Missouri expects to file an update to the 2020 Integrated Resource Plan in June 2022 to reflect, among other things, the accelerated retirement of the Rush Island Energy Center. 2 400 MW and 300 MW facilities in-service in Dec. 2020 and June 2021, respectively. 3 Reductions as of end of period indicated and based off 2005 levels. Wind and solar additions, energy center retirements by end of indicated year. Assumes unspecified carbon-free generation in 2043. 4 Includes Scope 1 emissions as described in Ameren's 2021 Climate Report, "Committed to Clean, Transformational Changes to Net-Zero". First Quarter 2022 Earnings | May 6, 2022 23

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