Ameren Corporation has entered into amended and restated multi-year, senior unsecured revolving credit agreements with JPMorgan Chase Bank, N.A. and a syndicate of lenders. On December 10, 2025, the total facility size for the Amended Missouri Credit Agreement was increased from $1.4 billion to $1.9 billion, with maximum borrowing limits for both Ameren and Ameren Missouri raised to $1.6 billion each. Simultaneously, the Amended Illinois Credit Agreement facility size was increased from $1.2 billion to $1.3 billion, with borrowing limits for Ameren and Ameren Illinois set at $800 million and $1.1 billion, respectively. The aggregate maximum for letters of credit was raised to $400 million for the Missouri Borrowers, while the Illinois Borrowers' limit remains at $275 million. The $50 million swingline subfacility under both agreements remains unchanged.