Warner Baxter became chairman, president and chief executive officer of Ameren Corporation in 2014. From 2009 to early 2014, he served as president and CEO of Ameren Missouri, the largest energy provider in Missouri, serving more than 1.2 million electric and gas customers with revenues in excess of $3 billion. From 2003 to 2009, Baxter was executive vice president and chief financial officer of Ameren Corporation, where he led the finance, strategic planning and business risk management functions of the entire enterprise. In 2007, Baxter assumed additional duties as president and CEO of Ameren Services.
Baxter joined Union Electric in August 1995 as assistant controller, was named controller in 1996, and after the merger of Union Electric and CIPSCO Incorporated in 1997, he became vice president and controller. In 2001, Baxter was named senior vice president of finance.
Before joining Ameren, Baxter served as senior manager in PricewaterhouseCooper's LLP national office in New York City from 1993 to 1995, serving as one of the firm's liaisons with the major accounting standard setting bodies in the United States. From 1983 to 1993, Baxter worked in the firm's St. Louis office, where he provided auditing and consulting services to clients in a variety of industries.
Baxter, a Certified Public Accountant, earned a bachelor of science degree in accounting from the University of Missouri-St. Louis. He is a member of the American Institute of Certified Public Accountants and the Missouri Society of Certified Public Accountants. In addition, Baxter has made meaningful and long-lasting contributions to higher education through his involvement at the University of Missouri and the University of Missouri-St. Louis. He is a member and past president of the University of Missouri–St. Louis Chancellors Council and serves on the University of Missouri 100 Board.
Today, Baxter serves on the boards of UMB Financial Corporation, a public company, the Edison Electric Institute, Civic Progress St. Louis and the St. Louis Regional Chamber. He also is actively involved with several charitable organizations, including as chair of the American Cancer Society's St. Louis Chapter of CEOs Against Cancer of Missouri.