H2O AMERICA

Stockholders of record may vote at the Annual Meeting via:

Instructions for voting are provided below and also included on the proxy card, Notice of Internet Availability of Proxy Materials, email notification, and/or voting instruction form, as applicable. The Internet and telephone voting facilities will close at 11:59 PM Eastern Time on May 13, 2025. If a proxy is received from a stockholder that includes specific voting instructions, the shares represented thereby will be voted at the Annual Meeting in accordance with the instructions specified by the stockholder. If voting instructions are not specified, the shares represented by that proxy (if that proxy is not revoked) will be voted at the Annual Meeting FOR the election of each of the director nominees listed in Proposal 1, and FOR each of Proposals 2 and 3, and as the proxy holder may determine in their discretion with respect to any other matter that properly comes before the Annual Meeting or any adjournment or postponement thereof.

YOUR VOTE IS IMPORTANTPLEASE VOTE BY INTERNET, TELEPHONE, OR MAILWHETHER OR NOT YOU PLAN TO ATTEND THE ANNUAL MEETING

Using the information on your proxy card, you may vote shares registered in your name by:

•Internet: Going to www.voteproxy.com and following the on-screen instructions or scanning the QR code with your smartphone.

•Telephone: Calling toll-free 1-800-PROXIES (1-800-776-9437) in the United States 1-201-299-4446 from foreign countries from any touch tone phone and following the instructions. Please have your proxy card available when you call.

•Mail: Completing, signing and dating each proxy card received and returning it in the envelope provided. Your completed, signed, and dated proxy card must be received prior to the Annual Meeting.

You may revoke your proxy at any time before it is actually voted at the Annual Meeting by:

•Delivering written notice of revocation to the Corporate Secretary at SJW Group, 110 W. Taylor Street, San Jose, California 95110;

•Submitting a later dated proxy; or

•Attending and voting at the Annual Meeting.

Your attendance at the Annual Meeting will not, by itself, constitute a revocation of your proxy.

You may also have another person attend the Annual Meeting to represent you by executing a form of proxy designating that person to act on your behalf.

You or your representative may only vote the shares for which you are the record holder (as indicated in the stock transfer records of the Corporation). If you are a beneficial owner of shares, but those shares are held of record by another person such as a stock brokerage firm or bank, then you must provide voting instructions to the appropriate record holder so that such person can vote those shares. In the absence of such voting instructions from you, the record holder may not be entitled to vote those shares.