On August 4, 2025, American Water Works Company, Inc. ("American Water") entered into a forward sale agreement (a "Forward Sale Agreement," and, collectively, the "Forward Sale Agreements") with each of Wells Fargo Bank, National Association, JPMorgan Chase Bank, National Association, and Mizuho Markets Americas LLC (with Mizuho Securities USA LLC acting as agent) (each, a "Forward Purchaser"), relating to an aggregate of 7,042,254 shares (the "Borrowed Shares") of American Water's common stock, par value $0.01 per share ("Common Stock").