- CEO
- Martin J Lyons Jr
- Full Time Employees
- 3,280
- Sector
- Utilities
- Industry
- Regulated Electric
- Address
- 10 Richard Mark Way Collinsville IL United States of America 62234
- IPO Date
- Mar 10, 1999
- Business
- Ameren Illinois Company PFD 4% (Ticker: AILLP) operates as a regulated utility subsidiary of Ameren Corporation, delivering electric and natural gas distribution services to approximately 1.3 million electric and 400,000 natural gas customers across central and southern Illinois. The company provides core services including electric transmission and distribution via over 120,000 miles of lines; natural gas distribution through more than 11,000 miles of mains and service lines; smart grid technologies for enhanced reliability and outage management; energy efficiency programs such as rebates and demand-side management initiatives; renewable energy integration supporting wind, solar, and customer-sited generation; and advanced metering infrastructure for real-time usage data. Headquartered in Collinsville, Illinois, and founded in 1902 as a segment of the broader Ameren enterprise, it focuses on residential, commercial, industrial, and municipal customer segments within the U.S. Midwest region. Recent major developments include the 2024 approval of a $2.8 billion multi-year infrastructure investment plan by the Illinois Commerce Commission, emphasizing grid modernization, storm hardening, and clean energy transitions; strategic partnerships with local governments for electric vehicle charging networks; and the launch of expanded decarbonization programs aligned with Illinois' Climate and Equitable Jobs Act, including new solar procurement and battery storage projects completed in late 2024 and early 2025.