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4Q23 & FY23 Financial Results

Used Vehicle Overview Total Used Vehicle Revenues ($MM)* +13% 2019-2023 CAGR Retail Wholesale U.S. Used Market Size¹ (MM) Annual Used Vehicle Units 40 40 38 2023 6,135 2022 6,092 2021 4,874 2020 3,414 2019 3,722 *Includes Brazil discontinued operations Group1Auto.com - Investor Presentation 39 39 41 37 36 36 2015 2016 2017 2018 2019 2020 2021 2022 2023 1Source: Edmunds and Cox Automotive GPI Outperforms the Used Vehicle Industry FY23 GPI U.S. Same Store Unit Sales: +4% YoY FY23 U.S. Used Market Unit Sales: Flat YoY U.S. Market Share² 30% 35% 35% ■New Vehicle Dealers ■Used Vehicle Dealers ■Private Party 2Source: NADA-U.S. 2023 Used Vehicle Data Page 14

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