Ameren is a regional energy company dedicated to delivering reliable energy while helping meet the evolving needs of customers and communities. Through innovation, collaboration and long-term sustainability planning, Ameren continues to advance cleaner energy solutions across Missouri and Illinois, earning Champion Level status in the 2025 St. Louis Green Business Challenge.
As part of the 2025 Challenge, Ameren highlighted its Champion Innovation Project, Powering Growth. The project showcased a variety of initiatives designed to strengthen energy reliability, support economic growth and advance sustainability goals throughout the region, all rooted in collaboration.
“Together, we are more powerful than each of us can be on our own,” said Gwen Mizell, Senior Vice President, Chief Sustainability Officer for Ameren. “It is through collaboration that we build trust. It is through collaboration that we create and execute meaningful, sustainable programs that help deliver stability to all our community members. And it’s through collaboration that we share our knowledge about what’s working, what’s not, why not, and where we go from here.”
That collaborative approach helped drive significant results. Through Ameren Missouri’s BizSavers® program, more than 230 Missouri businesses saved over $2.9 million and nearly 30 million kilowatt-hours of energy by upgrading to high-efficiency HVAC systems since July 2024. In addition, an initiative to repurpose retiring wood utility poles prevented more than 5,500 tons of wood waste from entering landfills over the past three years.
Ameren also continued investing in technologies that improve energy reliability. During major storm events from January through June 2025, the company’s smart switch technology prevented more than 150,000 customer outages by automatically rerouting power when disruptions occurred.
The company made notable progress in expanding renewable energy resources as well. New solar generation brought online in 2024 produced enough energy to power approximately 93,000 homes annually. Ameren also began constructing or planning four additional solar projects capable of powering more than 117,000 homes each year and announced plans for its first large-scale lithium-ion battery installation to support customer reliability.
Beyond infrastructure investments, Ameren demonstrated its commitment to the communities it serves. Following the May 16, 2025 tornado, the company donated $1 million in relief funding for survivors and made an additional $4 million available for customer bill payment assistance. Ameren also partnered with hundreds of agencies to help provide more than $75 million in available energy assistance to customers in need.
Ameren’s commitment to collaboration was further recognized through the 2025 Green Jean Ponzi Collaborative Action Award, which honors organizations that work together on initiatives extending beyond traditional sustainability practices.
Through investments in cleaner energy, innovative technologies and strong community partnerships, Ameren continues to demonstrate how sustainability and reliability can work hand in hand to power the future of the St. Louis region.
To learn more about Ameren or get involved in the St. Louis Green Business Challenge, subscribe to the bi-monthly E-Newsletter or visit stlouisgreenchallenge.com. For more on how sustainability supports better air quality, visit the Clean Air Partnership website, like us on Facebook or follow us on X @gatewaycleanair.
