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 March 31, 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. Brian Healy, a Member of the Board of Directors, adopted a written trading plan on February 11, 2026. The trading plan begins on May 15, 2026, and ends on January 29, 2027. The trading plan is intended to satisfy the affirmative defense conditions of the Exchange Act Rule 10b5-1(c) and permit Mr. Healy to purchase up to $120,000 worth of common stock of the Company, subject to certain conditions.

Ms. Marietta Edmunds Zakas, the Company’sformer Chief Executive Officer, adopted a written trading plan on February 26, 2026. The trading plan begins on May 28, 2026, and ends on March 31, 2027. The trading plan is intended to satisfy the affirmative defense conditions of the Exchange Act Rule 10b5-1(c) and permit Ms. Zakas to sell up to 199,614 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 March 31, 2026.