AMERICAN STATES WATER CO

(a) On October 26, 2026, AWR’s Board of Directors approved a fourth quarter dividend of $0.5455 per share on AWR’s Common Shares. Dividends on the Common Shares will be paid on December 2, 2026 to shareholders of record at the close of business on November 16, 2026.

(b) There have been no material changes during thethird quarter of 2026 to the procedures by which shareholders may nominate persons to the Board of Directors of AWR.

(c) Certain of our officers have made, and may from time to time make, elections to participate in our 401(k) plan or our common share purchase and dividend reinvestment plan, which may be designed to satisfy the affirmative defense conditions of Rule 10b5-1 under the Exchange Act or may constitutenon-Rule 10b5-1 trading arrangements (as defined in Item 408(c) of Regulation S-K). On August 12, 2026, Ms. Anne M. Holloway, Chair of the Board of Directorsof Registrant, adopted a stock trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act. The maximum number of shares of AWR to be sold under the plan is 3,600. The plan will terminate on the earlier of the date all the shares covered by the plan are sold and January 31, 2028.