X0508 4 2025-12-09 1 0001350593 Mueller Water Products, Inc. MWA 0001303624 Heinrichs Steven S 1200 ABERNATHY RD., NE SUITE 1200 ATLANTA GA 30328 1 Former EVP, CFO, CLO and CCO 1 Common Stock 2025-12-09 4 S 0 14965.0000 24.2862 D 30050.0663 D Common Stock 2025-12-09 4 S 0 18557.0000 24.2853 D 11493.0663 D The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2025. The price reported in Column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $24.070 to $24.550, inclusive. The reporting person undertakes to provide to Mueller Water Products, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Includes 11,493.07 shares acquired under the Mueller Water Products, Inc. Employee Stock Purchase Plan. /s/ Barbara A. Smucygz, Attorney-in-Fact 2025-12-10