Exhibit 99.1 Grocery Outlet Holding Corp. Announces Fourth Quarter and Fiscal 2023 Financial Results Q4 fiscal 2023 net sales increased 6.3% Q4 fiscal 2023 comparable store sales grew 2.7% driven by a 7.5% increase in transactions Company provides outlook for fiscal 2024 including impact of United Grocery Outlet pending acquisition Emeryville, CA – February 27, 2024 – Grocery Outlet Holding Corp. (NASDAQ: GO) ("Grocery Outlet" or the "Company") today announced financial results for the fourth quarter and fu ...