# Ameren

> Ameren is a St. Louis-based, publicly traded utility holding company providing regulated electricity and natural gas services in Missouri and Illinois. Its businesses combine Missouri power generation, energy delivery in both states and regional transmission development, serving approximately 2.5 million electric and more than 900,000 gas customer accounts as reported in September 2026.

- **Founded:** 1997
- **Headquarters:** St. Louis, United States
- **Products:** Ameren Missouri electricity service, Ameren Illinois electricity delivery, Natural gas distribution, Regional transmission development, Smart Energy Plan
- **Notable:** Ameren Missouri reported 160,000 customer outages prevented during major storms in 2025., More than 2,000 Missouri smart switches and nearly 150 substations modernized through the Smart Energy Plan, reported February 2026., Ameren Illinois won approval of a revised 2024-2027 grid plan in December 2024 after its original proposal was rejected.

## Products & services

- **Ameren Missouri electricity service** — Regulated electricity generation, transmission and distribution in central and eastern Missouri.
- **Ameren Illinois electricity delivery** — Regulated transmission and distribution; electricity supply can come from an alternative retail supplier.
- **Natural gas distribution** — Gas delivery through utility networks in Missouri and Illinois.
- **Regional transmission development** — Ameren Transmission Company of Illinois develops, owns and operates regional rate-regulated transmission in MISO.
- **Smart Energy Plan** — Missouri infrastructure upgrades including smart switches, stronger poles, substations and generation investments.
- **Energy efficiency and demand response** — Offerings include Peak Time Savings, Pay As You Save, CommunitySavers and BizSavers; availability and eligibility vary.

## Achievements

- Ameren Missouri reported 160,000 customer outages prevented during major storms in 2025.
- More than 2,000 Missouri smart switches and nearly 150 substations modernized through the Smart Energy Plan, reported February 2026.
- Ameren Illinois won approval of a revised 2024-2027 grid plan in December 2024 after its original proposal was rejected.
- Callaway Energy Center has supplied nuclear-generated electricity since 1984.

## Latest updates

- **2026-09** — September 29: Ameren Missouri requested extensions of energy efficiency programs through 2028 and demand response into 2029; the extension requires PSC approval.
- **2026-09** — September 28: Missouri’s new 20-year resource roadmap included planned storage, gas, renewable and nuclear additions; reported signed agreements for 2.8 GW aggregate large-load demand by 2030.
- **2026-07** — July 30: reported Q2 net income attributable to common shareholders of US$314 million and diluted EPS of US$1.13; reaffirmed 2026 guidance.
- **2026-02** — Announced a US$31.8 billion infrastructure investment plan for 2026-2030.

## Links

- Website: https://www.ameren.com/
- LinkedIn: https://www.linkedin.com/company/ameren/
- Twitter/X: https://twitter.com/AmerenCorp
- YouTube: https://www.youtube.com/@AmerenMissouri
- Facebook: https://www.facebook.com/AmerenCorp

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Profile page: https://yespress.io/ameren
Published by YesPress — https://yespress.io
Last updated: 2026-10-22