Exhibit 99.1 Grocery Outlet Holding Corp. Announces Third Quarter Fiscal 2025 Financial Results Emeryville, CA – November 4, 2025 – Grocery Outlet Holding Corp. (NASDAQ: GO) ("Grocery Outlet," the "Company," "we" or "our") today announced financial results for the third quarter of fiscal 2025 ended September 27, 2025. Highlights for Third Quarter Fiscal 2025 as compared to Third Quarter Fiscal 2024: Highlights for the 39 Weeks Ended September 27, 2025 as compared to the 39 Weeks Ended September 28, 2024: Ad ...