Ameren Illinois Company, doing business as Ameren Illinois, engages in the rate-regulated electric generation, transmission, and distribution business in Illinois. The company also engages in the natural gas distribution businesses. It supplies electric services to 1.2 million customers and natural gas services to 0.8 million customers in a 43,700 square-mile area in central and eastern Illinois. The company was formerly known as Central Illinois Public Service Company and changed its name to Ameren Illinois Company in October 2010. Ameren Illinois Company was founded in 1902 and is based in Collinsville, Illinois. Ameren Illinois Company operates as a subsidiary of Ameren Corporation.

Ms. Chonda Jordan Nwamu Esq.

Senior Vice President, Gen. Counsel, Sec. & Non Independent Director

Mr. Michael L. Moehn

Chief Financial Officer, Executive Vice President & Non Independent Director

Executive Vice President, Gen. Counsel, Sec. & Non Independent Director

Mr. Patrick E. Smith

Senior Vice President & Director

Mr. David N. Wakeman

Senior Vice President of Operation & Technical Services and Non Independent Director

Ms. Theresa A. Shaw

Senior Vice President of Fin. & Chief Accounting Officer

Pardeep S. Gill

Vice President & Chief Procurement Officer

Mr. Martin J. Lyons Jr.

Chairman, President & Chief Executive Officer of Ameren Corporation

Ms. Bhavani  Amirthalingam

Senior Vice President & Chief Digital Information Officer, Ameren Services

Mr. Leonard P. Singh

Chairman & President

Senior Vice President of Finance & Chief Accounting Officer

Executive Vice President, General Counsel, Secretary & Non Independent Director

Mr. Patrick E. Smith Sr.

Senior Vice President of Operations, Technical Services & Director

Ms. Gwendolyn Goosby Mizell

Chief Sustainability, Diversity & Philanthropy Officer of Ameren Corporation

Mr. Douglas A. Fischer

Senior Director of Investor Relations

Chief Financial Officer, Senior Executive Vice President & Non Independent Director

Pres & Chief Executive Officer of Ameren Corporation

Chairman & Pres

Utilities—Regulated Electric

Ameren Illinois Company

Ameren Illinois Company Management Structure

Management information