Mueller Water Products, Inc.

(c) Our Section 16 officers and directors, as defined in Rule 16a-1(f) of the Exchange Act, may from time to time enter into plans for the purchase or sale of our common stock that are intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act. During the quarter ended June 30, 2026, the following officers or directors adopted a “Rule 10b5-1 trading arrangement” (as defined in Item 408 of Regulation S-K of the Exchange Act):

Mr. Paul McAndrew, the Company’s Chief Executive Officer, adopted a written trading plan on May 11, 2026. The trading plan begins on August 10, 2026, and ends on June 1, 2027. The trading plan is intended to satisfy the affirmative defense conditions of the Exchange Act Rule 10b5-1(c) and permits Mr. McAndrew to sell up to 40,000 shares of the Company, subject to certain conditions.

Dr. Christine Ortiz, a Member of the Board of Directors, adopted a written trading plan on June 1, 2026. The trading plan begins on August 31, 2026 and ends on February 26, 2027. The trading plan is intended to satisfy the affirmative defense conditions of the Exchange Act Rule 10b5-1(c) and permits Dr. Ortiz to sell up to 15,548 shares of the Company, subject to certain conditions.

These trading plans were adopted during an open trading window.

No other Section 16 officer or director, as defined in Rule 16a-1(f), adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as defined in Item 408 of Regulation S-K, during the three months ended June 30, 2026.