Exhibit 99.1 FOR IMMEDIATE RELEASE Group 1 Automotive Reports Second Quarter 2026 Financial Results HOUSTON, TX, July 30, 2026 — Group 1 Automotive, Inc. (NYSE: GPI) ("Group 1" or the "Company"), a Fortune 250 automotive retailer with 251 dealerships located in the U.S. and U.K., today reported financial results for the second quarter of 2026 ("current quarter"). "While our second quarter results softened due to consumer affordability issues, we continued to execute against the strategic initiatives that wi ...