Retired Chief Legal Officer and Head of Public Affairs of Truist Financial Corporation Director since: 2009 Lead Director since: 2024 Age: 65 STANDING BOARD COMMITTEES: Human Resources Committee Nominating and Corporate Governance Committee OUTSIDE DIRECTORSHIPS: None EXECUTIVE EXPERIENCE: Ms. Fitzsimmons served as Chief Legal Officer and Head of Public Affairs of Truist Financial Corporation from December 2019 through December 2023, having previously served as Corporate Executive Vice President, General Counsel and Corporate Secretary of its predecessor, SunTrust Banks, Inc., from 2018. From 2003 to November 2017, Ms. Fitzsimmons served as Senior and Executive Vice President of Law and Public Affairs, General Counsel and Corporate Secretary of CSX Corporation, a transportation supplier, which she joined in 1991. Ms. Fitzsimmons oversaw all legal, government relations and public affairs activities for CSX. During Ms. Fitzsimmons tenure with SunTrust and CSX, her responsibilities included key roles in public affairs and corporate governance-related areas. SKILLS AND QUALIFICATIONS: Based primarily upon Ms. Fitzsimmons extensive executive and leadership experience as the chief legal officer with broad responsibilities at a major financial services provider and a major transportation supplier, including strong legal, government relations, public affairs, regulatory, accounting, financial, risk management, internal audit, compliance, corporate governance, compensation, human capital management and compensation, inclusion, environmental and sustainability and administrative skills and experience; and tenure and contributions as a current Board and Board committee member, the Board concluded that Ms. Fitzsimmons should serve as a director of Ameren.