Ameren Missouri’s upgrades are strengthening the grid, improving reliability and preparing the system to meet customers’ energy needs for years to come.

Components of the rate review adjustment request include:

• Strengthening the grid and investing in smart technology through Ameren Missouri's Smart Energy Plan, making the electric system more dependable for families and businesses.
  • Rebuilding electric distribution lines with storm-hardened upgrades throughout north St. Louis and Southeast Missouri after tornadoes and severe weather severely damaged critical infrastructure in spring 2025.
  • Replacing aging infrastructure with new and upgraded power lines with increased capacity.
  • Adding and upgrading substations with smart technology to detect outages faster and restore power more quickly.
  • Upgrading utility poles, many fortified with stronger composite materials, to better withstand severe weather, reduce damage and speed restoration.
  • Utilizing Missouri-based suppliers and contractors to help deliver these projects, supporting local jobs and economic development.
• Upgrading energy generation sources to keep dependable power available when customers need it through improvements to the Labadie Energy Center and upgrades to the Audrain Energy Center to enable dual-fuel operation.
• Adding 400 megawatts of new generation to the grid by installing three new energy centers. Once in service by the end of 2026, these diversified power sources will produce enough electricity to power approximately 70,000 homes annually.
• Establishing a new income-eligible discount rate that offsets the proposed adjustment for our most vulnerable customers without increasing costs for everyone, which helps keep energy costs affordable for seniors and families on fixed incomes.

Alongside supporting reliability, we continue to manage costs carefully to help keep rates as low as possible. Today, Ameren Missouri’s residential electric rates are about 27% lower than Midwest and national averages and have remained below those benchmarks for several years. Even with this request, rates are expected to remain below those averages.

*Source: Average Residential Electric Prices – Edison Electric Institute (EEI), “Typical Bills and Average Rates Report” for 12 months ended June 30 each year through 2025. Ameren Missouri residential rates are 26% below the Midwest average and 28% below the U.S. average according to the latest EEI report.

As Missouri grows, costs to serve new data centers are not causing this request. In fact, Ameren Missouri customers are expected to see projected base rate savings of $21 million over the next two years, driven by committed data center customers.

Our approach to responsibly serving new large load customers is rooted in our Powering Missouri Growth Plan, enabled by Missouri Senate Bill 4. It’s one of the strictest laws in the nation when it comes to supplying power to data centers and providing customer protections by ensuring these new businesses – not other customers – pay the costs to serve them.