Exhibit 99.1 Grocery Outlet Holding Corp. Announces First Quarter Fiscal 2024 Financial Results Q1 fiscal 2024 net sales increased 7.4% Q1 fiscal 2024 comparable store sales grew 3.9%, driven by a 7.0% increase in transactions Company updates key guidance for fiscal 2024 Emeryville, CA – May 7, 2024 – Grocery Outlet Holding Corp. (NASDAQ: GO) ("Grocery Outlet" or the "Company") today announced financial results for the first quarter of fiscal 2024 ended March 30, 2024. Highlights for First Quarter Fiscal 20 ...