BASIS OF PRESENTATION AND CONSOLIDATION AND ACCOUNTING POLICIES	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION AND CONSOLIDATION AND ACCOUNTING POLICIES	BASIS OF PRESENTATION AND CONSOLIDATION AND ACCOUNTING POLICIES Basis of Presentation and Consolidation The accompanying Condensed Consolidated Financial Statements and notes thereto, have been prepared in accordance with U.S. GAAP for interim financial information and in accordance with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. Results for interim periods are not necessarily indicative of the results that can be expected for a full year and therefore should be read in conjunction with the Company’s audited Financial Statements and notes thereto included within the Company’s 2025 Form 10-K. All intercompany balances and transactions have been eliminated in consolidation. The accompanying Condensed Consolidated Financial Statements reflect the consolidated accounts of the parent company, Group 1 Automotive, Inc. and its subsidiaries, all of which are wholly owned. Discontinued operations presented in the accompanying Condensed Consolidated Financial Statements relate to the Company’s Brazilian operations which were disposed of in 2022. Unless otherwise specified, disclosures in these Condensed Consolidated Financial Statements reflect continuing operations only. Certain amounts in the Condensed Consolidated Financial Statements and the accompanying notes may not compute due to rounding. All computations have been calculated using unrounded amounts for all periods presented. These Condensed Consolidated Financial Statements reflect, in the opinion of management, all normal recurring adjustments necessary to fairly state, in all material respects, the Company’s financial position and results of operations for the periods presented. Use of Estimates The preparation of the Company’s financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the balance sheet date and the amounts of revenues and expenses recognized during the reporting period. Management analyzes the Company’s estimates based on historical experience and other assumptions that are believed to be reasonable under the circumstances, however, actual results could differ materially from such estimates. The significant estimates made by management in the accompanying Condensed Consolidated Financial Statements include, but are not limited to, inventory valuation adjustments, reserves for future chargebacks on finance, insurance and vehicle service contract fees, self-insured property and casualty insurance exposure, the fair value of assets acquired and liabilities assumed in business combinations, the valuation of goodwill and intangible franchise rights and reserves for potential litigation. Recent Accounting Pronouncements In November 2024, the FASB issued ASU 2024-03, Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures. The ASU requires that an entity disclose additional information about specific expense categories in the notes to financial statements. The standard will be effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements. In November 2025, the FASB issued ASU 2025-09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements. The ASU is intended to simplify and clarify hedge accounting under ASC 815 and improves the alignment of hedge results with risk-management activities. The standard will be effective for fiscal years beginning after December 15, 2026, and interim periods within those annual reporting periods. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements. The Company adopted ASU 2025-05, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, on a prospective basis effective January 1, 2026. The adoption did not have a material impact on the Company’s consolidated financial statements. The Company adopted ASU 2025-06, Intangibles — Goodwill and Other — Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, on a prospective basis effective January 1, 2026. The adoption did not have a material impact on the Company’s consolidated financial statements.

The accompanying Condensed Consolidated Financial Statements and notes thereto, have been prepared in accordance with U.S. GAAP for interim financial information and in accordance with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. Results for interim periods are not necessarily indicative of the results that can be expected for a full year and therefore should be read in conjunction with the Company’s audited Financial Statements and notes thereto included within the Company’s 2025 Form 10-K. All intercompany balances and transactions have been eliminated in consolidation. The accompanying Condensed Consolidated Financial Statements reflect the consolidated accounts of the parent company, Group 1 Automotive, Inc. and its subsidiaries, all of which are wholly owned.

Discontinued operations presented in the accompanying Condensed Consolidated Financial Statements relate to the Company’s Brazilian operations which were disposed of in 2022. Unless otherwise specified, disclosures in these Condensed Consolidated Financial Statements reflect continuing operations only.

Certain amounts in the Condensed Consolidated Financial Statements and the accompanying notes may not compute due to rounding. All computations have been calculated using unrounded amounts for all periods presented. These Condensed Consolidated Financial Statements reflect, in the opinion of management, all normal recurring adjustments necessary to fairly state, in all material respects, the Company’s financial position and results of operations for the periods presented.

The preparation of the Company’s financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the balance sheet date and the amounts of revenues and expenses recognized during the reporting period. Management analyzes the Company’s estimates based on historical experience and other assumptions that are believed to be reasonable under the circumstances, however, actual results could differ materially from such estimates. The significant estimates made by management in the accompanying Condensed Consolidated Financial Statements include, but are not limited to, inventory valuation adjustments, reserves for future chargebacks on finance, insurance and vehicle service contract fees, self-insured property and casualty insurance exposure, the fair value of assets acquired and liabilities assumed in business combinations, the valuation of goodwill and intangible franchise rights and reserves for potential litigation.

In November 2024, the FASB issued ASU 2024-03, Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures. The ASU requires that an entity disclose additional information about specific expense categories in the notes to financial statements. The standard will be effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. The Company is currently evaluating the impact that the adoption of the provisions of the ASU will have on its consolidated financial statements.

Improvements. The ASU is intended to simplify and clarify hedge accounting under ASC 815 and improves the alignment of hedge results with risk-management activities. The standard will be effective for fiscal years beginning after December 15,

The Company adopted ASU 2025-05, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, on a prospective basis effective January 1, 2026. The adoption did not have a material impact on the Company’s consolidated financial statements.

The Company adopted ASU 2025-06, Intangibles — Goodwill and Other — Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, on a prospective basis effective January 1, 2026. The adoption did not have a material impact on the Company’s consolidated financial statements.