Exhibit 99.1 FOR IMMEDIATE RELEASE Group 1 Automotive Reports First Quarter 2024 Financial Results Current quarter net income from continuing operations was 147.4million.Currentquarteradjustednetincomefromcontinuingoperations(anon−GAAPmeasure)was130.0 million. Current quarter diluted earnings per common share from continuing operations was 10.76.Currentquarteradjusteddilutedearningspercommonsharefromcontinuingoperations(anon−GAAPmeasure)was9.49. "We continue to execute well ...