Ameren Corporation · NYSE:AEE

Ameren — Corporate Update (September 2026)

7 slides from Ameren's corporate update, Sep 28, 2026

  1. Slide 1: Ameren Missouri Integrated Resource Plan

    Ameren Missouri Integrated Resource Plan | September 28, 2026 1

  2. Slide 2: Cautionary Statements

    Cautionary Statements Forward-looking Statements Statements in this presentation not based on historical facts are considered "forward-looking" and, accordingly, involve risks and uncertainties that could cause actual results to differ materially from those discussed. Although such forward-looking s

  3. Slide 3: Missouri Large Load Growth Opportunities

    Missouri Large Load Growth Opportunities Preferred Resource Plan designed to serve anticipated large load growth while maintaining reliability and affordability Total Ameren Missouri Retail Sales Assumptions • 2.8 GW of signed Electric Service Agreements in Ameren Missouri’s 2026 IRP – ESA sales beg

  4. Slide 4: 2026 Ameren Missouri Preferred Resource Plan

    2026 Ameren Missouri Preferred Resource Plan Assumed Load Growth • 2.9 GW of total load growth by 2030, 5 GW by 2035 Planned Generation • Natural gas: Add 1.9 GW 2027-2030; 4.9 GW 2031-2035 Additions • Fuel cell: Add 0.5 GW 2027-2030 • Solar: Add 1.3 GW 2027-2030; 1.05 GW 2031-2035 • Wind: Add 1.5 G

  5. Slide 5: Changes in Ameren Missouri Preferred Resource Plan

    Changes in Ameren Missouri Preferred Resource Plan Overall increase of 1.2 GW through 2030 and 3.2 GW 2031-2035 vs 2025 Preferred Resource Plan Key Actions 2026 PRP 2025 PRP Specifics Sioux ~1,000 MW by 2035 Sioux ~1,000 MW by 2035 Coal Retirements Labadie ~1,200 by 2036 and • Two units at Labadie e

  6. Slide 6: Preferred Resource Plan Capacity by Resource Type in MW

    Preferred Resource Plan Capacity by Resource Type in MW1 Investing in a mix of generation technologies to cost-effectively power the future needs of our customers Generation Gas Gas Pump Total Portfolio Nuclear Coal Combined Simple Fuel Cell Battery Storage Hydro Solar Wind Capacity Progression Cycl

  7. Slide 7: Glossary of Terms and Abbreviations

    Glossary of Terms and Abbreviations EOY – End of Year ESAs – Electric Service Agreements GW – Gigawatts CEJA – Climate and Equitable Jobs Act CTG – Combustion turbine generator MW – Megawatts PRP – Preferred Resource Plan SB – Senate Bill SEC – Securities and Exchange Commission 7

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