Grocery Outlet Holding Corp.

If you are a stockholder of record, you can vote in one of four ways:

ü Visitwww.proxyvote.com to vote VIA THE INTERNET

ü Call 1-800-690-6903 to vote BY TELEPHONE

ü If you received a printed copy of the proxy materials, sign, date and return your proxy card in the prepaid enclosed envelope to vote BY MAIL

ü Attend virtually to vote DURING THE ANNUAL MEETING

To reduce our administrative and postage costs and the environmental impact of our 2026 Annual Meeting, we encourage stockholders to vote via the Internet or by telephone, both of which are available 24 hours a day, seven days a week, until 11:59 p.m. Eastern Time on May 31, 2026. Stockholders may revoke their proxies at the time and in the manner described on page 102 of this Proxy Statement.

If your shares of our common stock are held in “street name” through a bank, broker or other holder of record, you will receive voting instructions from the holder of record that you must follow in order for your shares to be voted. If you hold shares in this manner and wish to vote during the meeting, you must obtain a legal proxy from the bank, broker or other holder of record that holds your shares of our common stock.