Mueller Water Products, Inc.

On October 22, 2026, the Board also authorized the repurchase of up to an additional $300 million of the Company’s common stock under its existing stock repurchase program, effective immediately. Based on the approximately $34.5 million remaining available under the existing authorization as of September 30, 2026, approximately $334.5 million is available for repurchases under the expanded stock repurchase program after giving effect to the increase.

Repurchases under the program may be made in the open market, in privately negotiated transactions or by other means, including through trading plans intended to qualify under Rule 10b5-1 of the Securities Exchange Act of 1934, as amended, accelerated share repurchase arrangements and tender offers, with the amount and timing of repurchases to be determined at the Company’s discretion, depending on market and business conditions, prevailing stock prices, and contractual limitations, among other factors. The stock repurchase program does not obligate the Company to acquire any particular amount of common stock, or at any specific time or intervals, and may be modified, suspended or terminated at any time at the Company’s discretion.

A copy of the press release issued October 22, 2026, announcing the dividend increase and increased stock repurchase authorization is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.