Group 1 Automotive Q3 revenue falls 6.7% to $5.4B

U.S. same-store customer-pay revenue rose 3.2%, while total quarterly revenue declined 6.7% year over year.

Rhea-AI Filing Summary

Group 1 Automotive (GPI) reported third-quarter 2026 revenue of $5.4 billion, down 6.7% year over year. Net income from continuing operations was $102.9 million, versus $13.1 million a year earlier, while adjusted net income from continuing operations was $112.1 million, versus $135.1 million. Diluted earnings per share from continuing operations were $8.59, compared with $1.02; adjusted diluted earnings per share were $9.36, compared with $10.45.

The company completed its acquisition of 10 Hennessy dealerships on October 19, 2026, with expected annual revenues of approximately $1.7 billion. Since quarter-end, U.S. dealership dispositions generated approximately $235 million in proceeds, and an additional $125 million is expected from dispositions under definitive agreements, for approximately $360 million in total proceeds. The company said its disposition plan to reduce leverage remains on track. U.S. same-store customer-pay revenue rose 3.2% and repair orders rose 4% year over year. GPI repurchased no shares during the quarter; year-to-date repurchases totaled 205,190 shares at an average price of $353.08 per share.

1 point · 0 major

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It reads the document as published, with the same rules for every company, and it does not look at what the market expected or at how the stock traded, so a point can be objectively good on a day the stock falls.

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0 major · 2 points

How the balance works

Positive

• Moderate pointContinuing-operations net income increased 682.8% to $102.9 million.

Negative

• Moderate pointRevenue declined 6.7% to $5.4 billion.
• Moderate pointAdjusted continuing-operations net income was $112.1 million, versus $135.1 million.

Filing Explained

Lower impairment charges contextualize the rise in reported continuing income against a decline in adjusted income.

The third-quarter results release says Group 1 Automotive completed the Hennessy acquisition and issued senior notes to finance it, making debt financing part of the completed transaction. At September 30, 2026, total debt was $3,886.2 million, versus $3,699.5 million at December 31, 2025.

The filing reports impairment charges in the quarter, compared with a year earlier, providing context for reported continuing income rising while adjusted continuing income declined.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Total revenue: $5.4 billion Net income from continuing operations: $102.9 million Adjusted net income from continuing operations: $112.1 million +4 more

7 metrics

Total revenue $5.4 billion Third quarter 2026; down 6.7% from the prior-year quarter

Net income from continuing operations $102.9 million Third quarter 2026; compared with $13.1 million in the prior-year quarter

Adjusted net income from continuing operations $112.1 million Third quarter 2026; compared with $135.1 million in the prior-year quarter

Diluted earnings per share from continuing operations $8.59 per share Third quarter 2026; compared with $1.02 per share in the prior-year quarter

Adjusted diluted earnings per share from continuing operations $9.36 per share Third quarter 2026; compared with $10.45 per share in the prior-year quarter

Hennessy acquisition expected annual revenues Approximately $1.7 billion Acquisition completed October 19, 2026

Year-to-date shares repurchased 205,190 shares at an average price of $353.08 per share During 2026

Key Terms

Same Store, adjusted diluted earnings per common share, floorplan notes payable, floorplan assistance, +1 more

5 terms

Same Store financial

"Same Store amounts presented include the results of dealerships"

Same store describes sales or revenue measured only at locations or outlets that have been open for a specified prior period, excluding new openings and closed units so performance is compared on an “apples-to-apples” basis. Investors use same-store figures to see whether existing operations are growing or shrinking on their own, like checking whether a long-standing shop is selling more or fewer items this year without the distortion of added or removed stores.

adjusted diluted earnings per common share financial

"adjusted diluted earnings per common share from continuing operations"

Adjusted diluted earnings per common share is a measure of a company’s profit allocated to each common share after removing one-time or unusual items and counting all potential shares (like options) that could dilute ownership. Think of it as the company’s “cleaned-up” profit per share—useful for investors because it aims to show the underlying earning power and makes trends or comparisons clearer, though the adjustments depend on management’s choices.

floorplan notes payable financial

"Floorplan notes payable, net"

floorplan assistance financial

"Floorplan assistance is included within New vehicle retail Gross profit"

constant currency financial

"The constant currency presentation, which is a non-GAAP measure"

Constant currency is a way of measuring financial results that removes the effects of changes in currency exchange rates. It allows for a clearer comparison of a company's performance over time by showing what the numbers would look like if exchange rates had stayed the same. This helps investors understand whether growth comes from actual business improvements or just currency fluctuations.

Earnings Snapshot

Total revenue: $5.4 billion

Three months ended September 30, 2026

Total revenue $5.4 billion Down 6.7% year over year

Net income from continuing operations $102.9 million Up 682.8% year over year

Adjusted net income from continuing operations $112.1 million Compared with $135.1 million in the prior-year quarter

Diluted earnings per share from continuing operations $8.59 per share Compared with $1.02 per share in the prior-year quarter

Adjusted diluted earnings per share from continuing operations $9.36 per share Compared with $10.45 per share in the prior-year quarter

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What were GPI's third-quarter 2026 results?

GPI reported $5.4 billion in revenue, compared with $5.8 billion in the prior-year quarter. Net income from continuing operations was $102.9 million, versus $13.1 million, and diluted earnings per share from continuing operations were $8.59, versus $1.02. Adjusted diluted earnings per share were $9.36, compared with $10.45.

How many Hennessy dealerships did GPI acquire?

GPI completed its acquisition of 10 Hennessy dealerships on October 19, 2026. The acquired operations had total expected annual revenues of approximately $1.7 billion. The acquisition included substantially all of Hennessy's assets, including real estate.

How much did GPI receive from dealership dispositions?

Completed U.S. dispositions after quarter-end generated approximately $235 million in proceeds. GPI also had definitive agreements to dispose of four dealerships for expected proceeds of approximately $125 million, for approximately $360 million in total proceeds.

How many shares did GPI repurchase in 2026?

GPI repurchased 205,190 shares during the year at an average price of $353.08 per share, for a total cost of $72.4 million, excluding $0.5 million in excise taxes. As of September 30, 2026, $306.3 million remained under its Board-authorized repurchase program.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/28/2026 - 06:30 AM EDT Accepted by SEC EDGAR 10/28/2026 - 06:30 AM EDT Learn about SEC filing dates

0001031203false00010312032026-10-282026-10-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): October 28, 2026

Group 1 Automotive, Inc.

(Exact name of Registrant as specified in its charter)

Delaware

1-13461

76-0506313

(State or other jurisdiction of incorporation)

(Commission File Number)

(I.R.S. Employer Identification No.)

730 Town and Country Blvd, Suite 500

Houston, Texas 77024

(Address of principal executive offices, including zip code)

Registrant's telephone number, including area code (713) 647-5700

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading symbol(s)

Name of exchange on which registered

Common stock, par value $0.01 per share

GPI

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if that registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 2.02     Results of Operations and Financial Condition.

On October 28, 2026, the Company issued a press release announcing its financial results for the three months ended September 30, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.

As provided in General Instruction B.2. of Form 8-K, the information in this Item 2.02 (including the press release attached as Exhibit 99.1 and incorporated by reference in this Item 2.02) shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01    Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.						Description
99.1						Press release of Group 1 Automotive, Inc., dated as of October 28, 2026.
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. 

Group 1 Automotive, Inc.

Date:

October 28, 2026

By:

/s/ Daniel J. McHenry

Daniel J. McHenry

Senior Vice President and Chief Financial Officer

Exhibit 99.1

FOR IMMEDIATE RELEASE

Group 1 Automotive Reports Third Quarter 2026 Financial Results

•Current quarter diluted earnings per common share from continuing operations of $8.59 and current quarter adjusted diluted earnings per common share from continuing operations (a non-GAAP measure) of $9.36

•Recently completed the purchase of 10 high volume and high margin dealerships from Hennessy Automobile Companies, expanding our presence in the fast-growing Atlanta market to 15 dealerships

•Disposition plan supporting our strategy to reduce leverage on track: completed U.S. dispositions with approximately $235 million in proceeds since quarter end, with an additional $125 million in proceeds expected from dispositions under definitive agreement, totaling approximately $360 million of proceeds

•All time record customer pay revenues and repair order count in the U.S.

HOUSTON, TX, October 28, 2026 — Group 1 Automotive, Inc. (NYSE: GPI) (“Group 1” or the “Company”), a Fortune 250 automotive retailer with 256 dealerships located in the U.S. and U.K., today reported financial results for the third quarter of 2026 (“current quarter”).

“We’re pleased to have closed the Hennessy acquisition and grateful to the Hennessy family for 62 years of excellent stewardship,” said Daryl Kenningham, Group 1's President and Chief Executive Officer. “This acquisition aligns with our strategy to focus on high-revenue, premium brand stores in growing markets where we have a strong local presence. We have been deliberately reshaping our portfolio into larger, more profitable stores and seeing good progress selling stores that don’t fit our strategy. Proceeds from these sales will support our commitment to reduce our leverage.

Our focus on operating execution was evident in the third quarter. Year-over-year growth rates improved across key same store operating metrics compared to the second quarter, despite challenging market conditions. Importantly, in the U.S. we grew same-store customer pay revenue and repair orders 3% and 4% year-over-year, respectively, and continued to benefit from the cost-cutting actions we took earlier this year.”

Reconciliations for financial results, non-GAAP metrics and diluted earnings per common share between continuing and discontinued operations are included in the accompanying financial tables.

Current Quarter Results Overview

•Current quarter total revenues were $5.4 billion, compared to $5.8 billion for the third quarter of 2025 (“prior-year quarter”).

•Current quarter net income from continuing operations was $102.9 million, compared to $13.1 million for the prior-year quarter.

•Current quarter adjusted net income from continuing operations (a non-GAAP measure) was $112.1 million, compared to $135.1 million for the prior-year quarter.

•Current quarter diluted earnings per common share from continuing operations was $8.59, compared to $1.02 for the prior-year quarter.

•Current quarter adjusted diluted earnings per common share from continuing operations (a non-GAAP measure) was $9.36, compared to $10.45 for the prior-year quarter.

1

Third Quarter 2026 Key Performance Metrics (year-over-year comparable period basis)			Consolidated						Same Store (a non-GAAP measure)
Reported:			3Q26			Change			3Q26			Change
Total revenues			$5.4B			(6.7)%			$5.3B			(2.8)%
Total gross profit (“GP”)			$854.8M			(7.1)%			$837.6M			(4.1)%
NV units sold			55,259			(3.5)%			53,933			(1.2)%
NV GP per retail unit (“PRU”)			$3,074			(5.4)%			$3,088			(4.4)%
Used vehicle (“UV”) retail units sold			53,343			(10.5)%			52,272			(8.5)%
UV retail GP PRU			$1,497			+4.5%			$1,506			+5.0%
Parts & service (“P&S”) GP			$392.0M			(3.8)%			$383.1M			+0.1%
P&S Gross Margin (“GM”)			55.9%			+0.4%			55.8%			(1.0)%
Finance and Insurance (“F&I”) revenues			$215.8M			(10.4)%			$211.4M			(8.9)%
F&I GP PRU			$1,987			(3.6)%			$1,991			(4.1)%
Selling, General and Administrative (“SG&A”) expenses as a % of GP			72.3%			+112 bps			72.1%			+194 bps
Adjusted SG&A expenses (a non-GAAP measure) as a % of GP			71.4%			+129 bps			71.1%			+210 bps

U.S. Operations Update

•U.S. parts and service customer pay revenues for the current quarter were $305.5 million, a 0.6% increase, compared to $303.5 million for the prior-year quarter. On a same store basis, U.S. parts and service customer pay revenues for the current quarter were $297.4 million, a 3.2% increase, compared to $288.2 million for the prior-year quarter.

•U.S. SG&A expenses for the current quarter were $452.1 million, a 6.0% decrease, compared to $481.2 million for the prior-year quarter. U.S. adjusted SG&A expenses for the current quarter were $445.2 million, a 5.4% decrease, compared to $470.7 million for the prior-year quarter.

•U.S. used vehicle GP PRU for the current quarter was $1,527, a 0.2% decrease, compared to $1,529 for the prior-year quarter. On a same store basis, U.S. used vehicle GP PRU for the current quarter was $1,544, a 1.6% increase, compared to $1,520 for the prior-year quarter.

U.K. Operations Update

•U.K. new vehicle retail units sold for the current quarter were 15,984, a 1.9% increase, compared to 15,687 for the prior-year quarter. On a same store basis, U.K. new vehicle retail units sold for the current quarter were 15,467, an 8.1% increase, compared to 14,308 for the prior-year quarter.

•U.K. used vehicle retail GP PRU for the current quarter was $1,437, a 15.7% increase, compared to $1,242 for the prior-year quarter. On a same store basis, U.K. used vehicle retail GP PRU for the current quarter was $1,428, a 13.9% increase, compared to $1,254 for the prior-year quarter.

•U.K. parts and service revenues for the current quarter were $162.3 million, a 2.4% decrease, compared to $166.3 million for the prior-year quarter. On a same store basis, U.K. parts and service revenues for the current quarter were $159.7 million, a 6.4% increase, compared to $150.2 million for the prior-year quarter.

2

U.S. Corporate Development

•On July 30, 2026, the Company entered into a Purchase and Sale Agreement (the “Purchase Agreement”) to acquire substantially all of the assets, including real estate, of Hennessy Automobile Companies, Inc., headquartered in Atlanta, Georgia (the “Hennessy Acquisition”). On October 19th, 2026, the Company completed the Hennessy Acquisition, with total expected annual revenues of approximately $1.7 billion.

•Year to date, the Company has acquired 14 dealership operations, inclusive of the Hennessy Acquisition, in the U.S. with total expected annual revenues of approximately $2 billion. The Company remains focused on efficiently and effectively integrating acquisitions into existing operations to create value for shareholders.

•The Company also completed the disposition of two U.S. dealerships in July 2026 that were acquired during the second quarter with the intention of reselling. Year-to-date total annualized revenues associated with dealership dispositions for the Company in the U.S. were approximately $505 million.

•Subsequent to the current quarter, consistent with our disposition strategy, the Company completed the dispositions of a Lexus, Acura and Honda dealership in the U.S., which generated approximately $305 million in annualized revenues, for proceeds of approximately $235 million. Additionally, the Company has executed agreements to dispose of four dealerships in the U.S., which generated approximately $235 million of annualized revenues, for expected proceeds of approximately $125 million.

U.K. Corporate Development

•During the current quarter, the Company disposed of a Volkswagen and an Audi dealership in the U.K. These dealerships generated approximately $100 million in annualized revenues, bringing year-to-date total annualized revenues associated with dealership dispositions for the Company in the U.K. to approximately $495 million.

•The Company reached an agreement with Jaguar Land Rover (“JLR”) in the U.K. to revoke its previous election to terminate 10 JLR franchise agreements, which would have been effective as of August 2027. As a result, the Company will retain and operate the five remaining JLR dealerships in the U.K. it had previously elected to terminate.

•The Company expanded its U.K. network through an agreement with Geely, opening two of three planned locations to date, with the third expected by December 2026. Subsequent to the current quarter, the Company agreed with Chinese automaker Chery to open an Omoda & Jaecoo location in the U.K., also expected by December 2026.

•Year to date, the Company has acquired and integrated three dealership operations in the U.K. with total expected annual revenues of approximately $135 million.

Share Repurchases

The Company did not repurchase any shares of its common stock during the current quarter. During the current year, the Company repurchased 205,190 shares of common stock, representing approximately 1.7% of shares outstanding as of January 1, 2026, at an average price of $353.08 per share, for a total cost of $72.4 million, excluding excise taxes of $0.5 million.

As of September 30, 2026, the Company had 11,947,272 shares of common stock and unvested restricted stock awards outstanding in the aggregate, and $306.3 million remaining under its Board authorized share repurchase program.

Future repurchases may be made from time to time, based on market conditions, legal requirements and other corporate considerations in the open market, pursuant to Rule 10b5-1 trading plans or in privately negotiated transactions, and subject to Board approval and covenant restrictions.

3

Third Quarter Earnings Conference Call Details

Daryl Kenningham, Group 1’s President and Chief Executive Officer, and several of the Company’s senior management team will host a conference call today at 10:00 a.m. ET to discuss the third quarter 2026 financial results. The conference call will be simulcast live on the Internet at http://www.group1corp.com/events. A webcast replay will be available for 30 days. A copy of the Company’s presentation will also be made available at http://www.group1corp.com/company-presentations.

The conference call will also be available live by dialing in 10 minutes prior to the start of the call at:

Domestic: 1-888-317-6003

International: 1-412-317-6061

Passcode:     0212869

A telephonic replay will be available following the call through November 4, 2026, by dialing:

Domestic: 1-855-669-9658

International: 1-412-317-0088

Replay Code:    7156798

ABOUT GROUP 1 AUTOMOTIVE, INC.

Group 1 owns and operates 256 automotive dealerships, 319 franchises, and 33 collision centers in the United States and the United Kingdom that offer 38 brands of automobiles. Through its dealerships and omni-channel platform, the Company sells new and used cars and light trucks; arranges related vehicle financing; sells service contracts; provides automotive maintenance and repair services; and sells vehicle parts.

Group 1 discloses additional information about the Company, its business, and its results of operations at www.group1corp.com, www.group1auto.com, www.group1collision.com, www.acceleride.com, and www.facebook.com/group1auto.

4

FORWARD-LOOKING STATEMENTS

This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are statements related to future, not past, events and are based on our current expectations, assumptions and beliefs as of the date of this press release regarding our business, the economy and other future conditions. In this context, the forward-looking statements often include statements regarding our strategic investments, goals, plans, projections and guidance regarding our financial position, results of operations and business strategy, including the financial and other benefits of anticipated or recently completed acquisitions or dispositions, including the Hennessy Acquisition, the timing thereof and our ability to achieve the intended operational, financial and strategic benefits therefrom, the expected proceeds and timing of pending dispositions, our leverage objectives, anticipated cost savings, the opening of new franchise locations and future share repurchases. These forward-looking statements often contain words such as "expects," "anticipates," "intends," "plans," "believes," "seeks," "should," "foresee," "may" or "will" and similar expressions. While management believes that these forward-looking statements are reasonable, there can be no assurance that future developments affecting us will be those that we anticipate. Any such forward-looking statements are not guarantees of future performance and involve significant risks and uncertainties that may cause actual results to differ materially from those expressed or implied in the statements. These risks and uncertainties include, among other things, (a) general economic and business conditions in the U.S. and the U.K., including inflation, interest rates (including the effects of recent and any future increases in benchmark interest rates on vehicle financing costs and our floorplan and other borrowing costs), foreign exchange rates, vehicle affordability and consumer demand, and the risk of recession in either market, (b) developments in U.S. and global trade policy, including tariffs on imported automobiles and on parts and materials, retaliatory tariffs, supply chain disruptions, vehicle and part cost increases and demand decreases, and litigation and refund claims related to invalidated tariffs and the timing, availability and amount of any refunds, (c) changes to U.S. federal tax laws, including deductions affecting the domestic auto industry and the availability of clean energy tax credits for electric vehicle production and sales, (d) the level of manufacturer incentives and other dealer financial assistance, (e) our ability to comply with extensive laws, regulations and policies applicable to our operations, including battery electric vehicle mandates and vehicle emissions standards in the U.K. and changes to U.S. vehicle emissions regulation, and their impact on new vehicle demand, (f) our ability to obtain an inventory of desirable new and used vehicles and parts and materials for our service operations, (g) our relationship with our automobile manufacturers and the willingness of manufacturers to approve future acquisitions, dispositions and franchise transfers, (h) our cost of financing and the availability of credit for consumers, (i) our ability to complete pending and future acquisitions and dispositions on anticipated terms, on a timely basis, if at all, including the receipt of required manufacturer approvals and the satisfaction of other closing conditions, and the risks associated therewith, (j) our ability to successfully integrate recent and future acquisitions, including the Hennessy Acquisition, and realize their anticipated operational, financial and strategic benefits, and the risks associated with our increased concentration in the Atlanta market, (k) our ability to achieve anticipated savings from cost reduction and restructuring initiatives, (l) our indebtedness, including the senior notes issued to finance the Hennessy Acquisition, increased interest expense, our ability to comply with the covenants in our debt agreements and our ability to reduce our leverage, (m) potential impairment of goodwill and intangible franchise rights, including as a result of a sustained decline in our share price or market capitalization, adverse changes in macroeconomic or industry conditions, and increases in discount rates or declines in projected cash flows, (n) the Stockholder Agreement with Conifer Management, L.L.C. and the actions of our significant stockholders, including the effect of their ownership levels on our share repurchases, and the change-of-control provisions in certain of our manufacturer agreements, (o) increased competition, including from emerging automotive manufacturers such as Chinese brands, (p) currency fluctuations, (q) the armed conflicts in Ukraine and the Middle East, including that between the U.S. and Iran, and related disruptions to energy markets and shipping routes, (r) our ability to maintain sufficient liquidity to operate, and (s) cyberattacks or other privacy or data security incidents, including those affecting our vendors’ information technology systems.

5

For additional information regarding known material factors that could cause our actual results to differ from those expressed or implied in our forward-looking statements, please see Item 1A. Risk Factors in our Annual Report on Form 10-K for the year ended December 31, 2025, and our subsequent filings with the Securities and Exchange Commission, including our Quarterly Reports on Form 10-Q (including our Quarterly Report on Form 10-Q for the quarter ended September 30, 2026, when filed) and our Current Reports on Form 8-K. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof. We expressly disclaim any duty to update or publicly revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

6

NON-GAAP FINANCIAL MEASURES, SAME STORE DATA, AND OTHER DATA

In addition to evaluating the financial condition and results of our operations in accordance with U.S. GAAP, from time to time our management evaluates and analyzes results and any impact on the Company of strategic decisions and actions relating to, among other things, cost reduction, growth, profitability improvement initiatives, and other events outside of normal, or "core," business and operations, by considering alternative financial measures not prepared in accordance with U.S. GAAP. In our evaluation of results from time to time, we exclude items that do not arise directly from core operations, such as non-cash asset impairment charges, accelerated depreciation, out-of-period adjustments, legal matters, severance and restructuring charges, acquisition costs, non-cash gains and losses on interest rate swaps, gains and losses on dealership franchise or real estate transactions, and catastrophic events, such as hailstorms, hurricanes and snow storms. Because these non-core charges and gains materially affect the Company's financial condition or results in the specific period in which they are recognized, management also evaluates, and makes resource allocation and performance evaluation decisions based on, the related non-GAAP measures excluding such items. This includes evaluating measures such as adjusted selling, general and administrative expenses, adjusted net income, adjusted diluted earnings per share, adjusted operating margin, adjusted pretax margin, adjusted finance and insurance gross profit per retail unit and constant currency. These adjusted measures are not measures of financial performance under U.S. GAAP, but are instead considered non-GAAP financial performance measures. Non-GAAP measures do not have definitions under U.S. GAAP and may be defined differently by, and not be comparable to similarly titled measures used by, other companies. As a result, any non-GAAP financial measures considered and evaluated by management are reviewed in conjunction with a review of the most directly comparable measures calculated in accordance with U.S. GAAP. We caution investors not to place undue reliance on such non-GAAP measures, but also to consider them with the most directly comparable U.S. GAAP measures.

In addition to using such non-GAAP measures to evaluate results in a specific period, management believes that such measures may provide more complete and consistent comparisons of operational performance on a period-over-period historical basis and a better indication of expected future trends. Our management also uses these adjusted measures in conjunction with U.S. GAAP financial measures to assess our business, including communication with our Board of Directors, investors, and industry analysts concerning financial performance. We disclose these non-GAAP measures, and the related reconciliations, because we believe investors use these metrics in evaluating longer-term period-over-period performance, and to allow investors to better understand and evaluate the information used by management to assess operating performance. The exclusion of certain expenses in the calculation of non-GAAP financial measures should not be construed as an inference that these costs are unusual or infrequent. We anticipate excluding these expenses in the future presentation of our non-GAAP financial measures.

In addition, we evaluate our results of operations on both an as reported and a constant currency basis. The constant currency presentation, which is a non-GAAP measure, excludes the impact of fluctuations in foreign currency exchange rates. We believe providing constant currency information provides valuable supplemental information regarding our underlying business and results of operations, consistent with how we evaluate our performance. We calculate constant currency percentages by converting our current period reported results for entities reporting in currencies other than U.S. dollars using comparative period exchange rates rather than the actual exchange rates in effect during the respective periods. The constant currency performance measures should not be considered a substitute for, or superior to, the measures of financial performance prepared in accordance with U.S. GAAP. The Same Store amounts presented include the results of dealerships for the identical months in each period presented in comparison, commencing with the first full month in which the dealership was owned by us and, in the case of dispositions, ending with the last full month it was owned by us. Same Store results also include the activities of our corporate headquarters.

Certain amounts in the financial statements may not compute due to rounding. All computations have been calculated using unrounded amounts for all periods presented.

7

Investor contacts:

David Helderman

Senior Manager, Investor Relations

Group 1 Automotive, Inc.

ir@group1auto.com

Media contacts:

Pete DeLongchamps

Senior Vice President, Manufacturer Relations, Financial Services and Corporate Development

Group 1 Automotive, Inc.

pdelongchamps@group1auto.com

Kimberly Barta

Head of Advertising, Brand and Communications

Group 1 Automotive, Inc.

kbarta@group1auto.com

or

Jude Gorman / Clayton Erwin

Collected Strategies

Group1-CS@collectedstrategies.com

8

Group 1 Automotive, Inc.
Condensed Consolidated Statements of Operations
(Unaudited)
(In millions, except per share data)
						Three Months Ended September 30,
						2026						2025						Increase/(Decrease)						% Change
REVENUES:
New vehicle retail sales						$	2,665.1					$	2,807.4					$	(142.2)					(5.1)		%
Used vehicle retail sales						1,691.1						1,852.1						(161.1)						(8.7)		%
Used vehicle wholesale sales						124.0						148.4						(24.4)						(16.5)		%
Parts and service sales						700.7						733.9						(33.3)						(4.5)		%
Finance, insurance and other, net						215.8						240.9						(25.0)						(10.4)		%
Total revenues						5,396.7						5,782.7						(386.0)						(6.7)		%
COST OF SALES:
New vehicle retail sales						2,495.3						2,621.3						(126.0)						(4.8)		%
Used vehicle retail sales						1,611.2						1,766.8						(155.6)						(8.8)		%
Used vehicle wholesale sales						126.7						148.7						(21.9)						(14.8)		%
Parts and service sales						308.7						326.3						(17.6)						(5.4)		%
Total cost of sales						4,541.9						4,863.0						(321.1)						(6.6)		%
GROSS PROFIT						854.8						919.7						(64.9)						(7.1)		%
Selling, general and administrative expenses						618.2						654.9						(36.7)						(5.6)		%
Depreciation and amortization expense						31.2						31.6						(0.4)						(1.1)		%
Asset impairments						7.0						123.9						(116.9)						(94.4)		%
Restructuring charges						0.1						1.6						(1.5)						(96.7)		%
Other operating income						(2.3)						—						(2.3)						(100.0)		%
INCOME FROM OPERATIONS						200.7						107.8						92.8						86.1		%
Floorplan interest expense						21.0						23.7						(2.7)						(11.2)		%
Other interest expense, net						48.1						48.0						0.2						0.3		%
INCOME BEFORE INCOME TAXES						131.5						36.2						95.3						263.4		%
Provision for income taxes						28.7						23.0						5.6						24.4		%
Net income from continuing operations						102.9						13.1						89.7						682.8		%
Net income (loss) from discontinued operations						—						(0.2)						0.2						108.3		%
NET INCOME						$	102.9					$	13.0					$	89.9					693.7		%
Less: Earnings allocated to participating securities						0.9						0.1						0.8						547.2		%
Net income available to diluted common shares						$	102.0					$	12.8					$	89.2					695.3		%
Diluted earnings per share from continuing operations						$	8.59					$	1.02					$	7.57					745.1		%
Diluted earnings (loss) per share from discontinued operations						$	—					$	(0.01)					$	0.02					109.0		%
DILUTED EARNINGS PER SHARE						$	8.59					$	1.00					$	7.59					756.9		%
Weighted average dilutive common shares outstanding						11.9						12.8						(0.9)						(7.2)		%
Weighted average participating securities						0.1						0.1						—						(25.1)		%
Total weighted average shares						12.0						12.9						(1.0)						(7.4)		%
Effective tax rate on continuing operations						21.8		%				63.7		%				(41.9)		%

9

Group 1 Automotive, Inc.
Condensed Consolidated Statements of Operations
(Unaudited)
(In millions, except per share data)
						Nine Months Ended September 30,
						2026						2025						Increase/(Decrease)						% Change
REVENUES:
New vehicle retail sales						$	7,833.6					$	8,222.8					$	(389.2)					(4.7)		%
Used vehicle retail sales						5,184.3						5,455.7						(271.5)						(5.0)		%
Used vehicle wholesale sales						424.9						463.8						(38.8)						(8.4)		%
Parts and service sales						2,097.5						2,144.4						(46.9)						(2.2)		%
Finance, insurance and other, net						648.5						704.8						(56.3)						(8.0)		%
Total revenues						16,188.8						16,991.5						(802.7)						(4.7)		%
COST OF SALES:
New vehicle retail sales						7,317.5						7,648.7						(331.2)						(4.3)		%
Used vehicle retail sales						4,934.8						5,180.4						(245.7)						(4.7)		%
Used vehicle wholesale sales						426.9						462.0						(35.1)						(7.6)		%
Parts and service sales						916.5						953.0						(36.5)						(3.8)		%
Total cost of sales						13,595.6						14,244.1						(648.5)						(4.6)		%
GROSS PROFIT						2,593.2						2,747.4						(154.2)						(5.6)		%
Selling, general and administrative expenses						1,842.2						1,918.2						(76.0)						(4.0)		%
Depreciation and amortization expense						93.3						89.6						3.7						4.1		%
Asset impairments						10.5						124.6						(114.1)						(91.6)		%
Restructuring charges						3.2						20.3						(17.1)						(84.3)		%
Other operating income						(2.3)						—						(2.3)						(100.0)		%
INCOME FROM OPERATIONS						646.3						594.7						51.6						8.7		%
Floorplan interest expense						66.3						77.0						(10.7)						(13.9)		%
Other interest expense, net						143.6						130.4						13.2						10.1		%
Other income						—						(0.2)						0.2						(99.8)		%
INCOME BEFORE INCOME TAXES						436.4						387.5						48.8						12.6		%
Provision for income taxes						100.7						106.8						(6.2)						(5.8)		%
Net income from continuing operations						335.7						280.7						55.0						19.6		%
Net income from discontinued operations						0.7						0.9						(0.2)						(20.8)		%
NET INCOME						$	336.4					$	281.6					$	54.8					19.5		%
Less: Earnings allocated to participating securities						3.2						3.2						(0.1)						(1.8)		%
Net income available to diluted common shares						$	333.2					$	278.4					$	54.9					19.7		%
Diluted earnings per share from continuing operations						$	28.03					$	21.50					$	6.53					30.3		%
Diluted earnings per share from discontinued operations						$	0.06					$	0.07					$	(0.01)					(13.6)		%
DILUTED EARNINGS PER SHARE						$	28.09					$	21.57					$	6.52					30.2		%
Weighted average dilutive common shares outstanding						11.9						12.9						(1.0)						(8.1)		%
Weighted average participating securities						0.1						0.1						—						(24.7)		%
Total weighted average shares						12.0						13.1						(1.1)						(8.3)		%
Effective tax rate on continuing operations						23.1		%				27.6		%				(4.5)		%

10

Group 1 Automotive, Inc.
Additional Information — Consolidated
(Unaudited)
						September 30, 2026						December 31, 2025						Increase/(Decrease)						% Change
SELECTED BALANCE SHEET INFORMATION:
(In millions)
Cash and cash equivalents						$	881.5					$	32.5					$	849.0					2,613.5		%
Inventories, net						$	2,573.5					$	2,741.3					$	(167.8)					(6.1)		%
Floorplan notes payable, net (1)						$	2,123.8					$	1,915.8					$	208.0					10.9		%
Total debt						$	3,886.2					$	3,699.5					$	186.7					5.0		%
Total equity						$	3,065.4					$	2,789.1					$	276.3					9.9		%
(1) Amounts are net of offset accounts of $153.0 and $504.2, respectively.

						Three Months Ended September 30,												Nine Months Ended September 30,
						2026						2025						2026						2025
NEW VEHICLE UNIT SALES GEOGRAPHIC MIX:
United States						71.1		%				72.6		%				69.9		%				71.2		%
United Kingdom						28.9		%				27.4		%				30.1		%				28.8		%
NEW VEHICLE UNIT SALES BRAND MIX:
Toyota/Lexus						27.9		%				26.8		%				26.9		%				25.5		%
Volkswagen/Audi/Porsche/SEAT/SKODA						15.3		%				14.1		%				15.2		%				15.2		%
BMW/MINI						12.3		%				12.4		%				12.9		%				12.1		%
Honda/Acura						8.6		%				8.1		%				8.6		%				8.3		%
Mercedes-Benz/Sprinter/smart						7.6		%				9.1		%				8.1		%				8.7		%
Chevrolet/GMC/Buick						7.1		%				8.2		%				7.2		%				8.2		%
Ford/Lincoln						7.2		%				7.2		%				7.0		%				6.9		%
Hyundai/Kia/Genesis						6.4		%				5.7		%				5.9		%				5.5		%
Jaguar/Land Rover						1.7		%				2.2		%				2.3		%				2.4		%
Nissan						2.0		%				1.8		%				1.9		%				1.9		%
Subaru						1.7		%				1.8		%				1.7		%				2.3		%
Chrysler/Dodge/Jeep/RAM/Citroën/Leapmotor						1.2		%				1.5		%				1.2		%				1.6		%
Mazda						1.1		%				1.1		%				1.0		%				1.1		%
Other						0.2		%				0.1		%				0.1		%				0.1		%
						100.0		%				100.0		%				100.0		%				100.0		%

						September 30, 2026						December 31, 2025						September 30, 2025
DAYS’ SUPPLY IN INVENTORY (1):
Consolidated
New vehicle inventory						39						46						40
Used vehicle inventory						38						36						36
U.S.
New vehicle inventory						51						44						52
Used vehicle inventory						33						29						31
U.K.
New vehicle inventory						21						52						20
Used vehicle inventory						48						55						46
(1) Days’ supply in inventory is calculated based on inventory unit levels and 30-day total unit sales volumes, both at the end of each reporting period.

11

Group 1 Automotive, Inc.
Reported Operating Data — Consolidated
(Unaudited)
(In millions, except unit data)
			Three Months Ended September 30,
			2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales			$	2,665.1					$	2,807.4					$	(142.2)					(5.1)		%							$	(2.7)					(5.0)		%
Used vehicle retail sales			1,691.1						1,852.1						(161.1)						(8.7)		%							(1.7)						(8.6)		%
Used vehicle wholesale sales			124.0						148.4						(24.4)						(16.5)		%							(0.1)						(16.4)		%
Total used			1,815.0						2,000.5						(185.5)						(9.3)		%							(1.9)						(9.2)		%
Parts and service sales			700.7						733.9						(33.3)						(4.5)		%							(0.5)						(4.5)		%
F&I, net			215.8						240.9						(25.0)						(10.4)		%							(0.1)						(10.3)		%
Total revenues			$	5,396.7					$	5,782.7					$	(386.0)					(6.7)		%							$	(5.3)					(6.6)		%
Gross profit:
New vehicle retail sales			$	169.9					$	186.1					$	(16.2)					(8.7)		%							$	(0.2)					(8.6)		%
Used vehicle retail sales			79.9						85.4						(5.5)						(6.5)		%							(0.1)						(6.4)		%
Used vehicle wholesale sales			(2.7)						(0.2)						(2.5)						NM									—						NM
Total used			77.1						85.1						(8.0)						(9.4)		%							(0.1)						(9.3)		%
Parts and service sales			392.0						407.6						(15.7)						(3.8)		%							(0.3)						(3.8)		%
F&I, net			215.8						240.9						(25.0)						(10.4)		%							(0.1)						(10.3)		%
Total gross profit			$	854.8					$	919.7					$	(64.9)					(7.1)		%							$	(0.7)					(7.0)		%
Gross margin:
New vehicle retail sales			6.4		%				6.6		%				(0.3)		%
Used vehicle retail sales			4.7		%				4.6		%				0.1		%
Used vehicle wholesale sales			(2.2)		%				(0.2)		%				(2.0)		%
Total used			4.2		%				4.3		%				—		%
Parts and service sales			55.9		%				55.5		%				0.4		%
Total gross margin			15.8		%				15.9		%				(0.1)		%
Units sold:
Retail new vehicles sold (1)			55,259						57,269						(2,010)						(3.5)		%
Retail used vehicles sold (1)			53,343						59,574						(6,231)						(10.5)		%
Wholesale used vehicles sold			14,301						16,018						(1,717)						(10.7)		%
Total used			67,644						75,592						(7,948)						(10.5)		%
Average sales price per unit sold:
New vehicle retail (1)			$	51,123					$	50,816					$	307					0.6		%							$	(51)					0.7		%
Used vehicle retail (1)			$	31,744					$	31,112					$	633					2.0		%							$	(27)					2.1		%
Gross profit per unit sold:
New vehicle retail sales			$	3,074					$	3,250					$	(176)					(5.4)		%							$	(4)					(5.3)		%
Used vehicle retail sales			$	1,497					$	1,433					$	64					4.5		%							$	(1)					4.6		%
Used vehicle wholesale sales			$	(191)					$	(15)					$	(176)					NM									$	1					NM
Total used			$	1,140					$	1,126					$	14					1.2		%							$	(1)					1.3		%
F&I PRU			$	1,987					$	2,061					$	(74)					(3.6)		%							$	(1)					(3.5)		%
Other:
SG&A expenses			$	618.2					$	654.9					$	(36.7)					(5.6)		%							$	(0.5)					(5.5)		%
Adjusted SG&A expenses (2)			$	610.5					$	645.0					$	(34.5)					(5.4)		%							$	(0.5)					(5.3)		%
SG&A as % gross profit			72.3		%				71.2		%				1.1		%
Adjusted SG&A as % gross profit (2)			71.4		%				70.1		%				1.3		%
Operating margin %			3.7		%				1.9		%				1.8		%
Adjusted operating margin % (2)			3.9		%				4.2		%				(0.3)		%
Pretax margin %			2.4		%				0.6		%				1.8		%
Adjusted pretax margin % (2)			2.7		%				3.0		%				(0.3)		%
Floorplan expense:
Floorplan interest expense			$	21.0					$	23.7					$	(2.7)					(11.2)		%							$	—					(11.2)		%
Less: Floorplan assistance (3)			23.0						23.5						(0.5)						(2.2)		%							—						(2.1)		%
Net floorplan expense			$	(2.0)					$	0.2					$	(2.2)														$	—

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

(3) Floorplan assistance is included within New vehicle retail Gross profit above and New vehicle retail Cost of sales in our Condensed Consolidated Statements of Operations.

NM — Not Meaningful

12

Group 1 Automotive, Inc.
Reported Operating Data — Consolidated
(Unaudited)
(In millions, except unit data)
			Nine Months Ended September 30,
			2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales			$	7,833.6					$	8,222.8					$	(389.2)					(4.7)		%							$	39.2					(5.2)		%
Used vehicle retail sales			5,184.3						5,455.7						(271.5)						(5.0)		%							41.0						(5.7)		%
Used vehicle wholesale sales			424.9						463.8						(38.8)						(8.4)		%							3.6						(9.1)		%
Total used			5,609.2						5,919.5						(310.3)						(5.2)		%							44.5						(6.0)		%
Parts and service sales			2,097.5						2,144.4						(46.9)						(2.2)		%							11.4						(2.7)		%
F&I, net			648.5						704.8						(56.3)						(8.0)		%							2.5						(8.4)		%
Total revenues			$	16,188.8					$	16,991.5					$	(802.7)					(4.7)		%							$	97.7					(5.3)		%
Gross profit:
New vehicle retail sales			$	516.1					$	574.1					$	(58.0)					(10.1)		%							$	3.1					(10.6)		%
Used vehicle retail sales			249.5						275.3						(25.8)						(9.4)		%							2.0						(10.1)		%
Used vehicle wholesale sales			(1.9)						1.8						(3.7)						NM									(0.1)						NM
Total used			247.6						277.1						(29.5)						(10.7)		%							1.8						(11.3)		%
Parts and service sales			1,181.0						1,191.4						(10.4)						(0.9)		%							6.3						(1.4)		%
F&I, net			648.5						704.8						(56.3)						(8.0)		%							2.5						(8.4)		%
Total gross profit			$	2,593.2					$	2,747.4					$	(154.2)					(5.6)		%							$	13.7					(6.1)		%
Gross margin:
New vehicle retail sales			6.6		%				7.0		%				(0.4)		%
Used vehicle retail sales			4.8		%				5.0		%				(0.2)		%
Used vehicle wholesale sales			(0.5)		%				0.4		%				(0.8)		%
Total used			4.4		%				4.7		%				(0.3)		%
Parts and service sales			56.3		%				55.6		%				0.7		%
Total gross margin			16.0		%				16.2		%				(0.2)		%
Units sold:
Retail new vehicles sold (1)			160,992						169,131						(8,139)						(4.8)		%
Retail used vehicles sold (1)			163,797						179,432						(15,635)						(8.7)		%
Wholesale used vehicles sold			45,018						49,402						(4,384)						(8.9)		%
Total used			208,815						228,834						(20,019)						(8.7)		%
Average sales price per unit sold:
New vehicle retail (1)			$	51,741					$	50,415					$	1,325					2.6		%							$	257					2.1		%
Used vehicle retail (1)			$	31,704					$	30,425					$	1,278					4.2		%							$	251					3.4		%
Gross profit per unit sold:
New vehicle retail sales			$	3,206					$	3,394					$	(189)					(5.6)		%							$	19					(6.1)		%
Used vehicle retail sales			$	1,523					$	1,534					$	(11)					(0.7)		%							$	12					(1.5)		%
Used vehicle wholesale sales			$	(43)					$	36					$	(79)					NM									$	(3)					NM
Total used			$	1,186					$	1,211					$	(25)					(2.1)		%							$	9					(2.8)		%
F&I PRU			$	1,997					$	2,022					$	(25)					(1.3)		%							$	8					(1.6)		%
Adjusted F&I PRU (2)			$	2,018					$	2,022					$	(4)					(0.2)		%							$	8					(0.6)		%
Other:
SG&A expenses			$	1,842.2					$	1,918.2					$	(76.0)					(4.0)		%							$	12.1					(4.6)		%
Adjusted SG&A expenses (2)			$	1,863.2					$	1,907.8					$	(44.6)					(2.3)		%							$	11.9					(3.0)		%
SG&A as % gross profit			71.0		%				69.8		%				1.2		%
Adjusted SG&A as % gross profit (2)			71.7		%				69.4		%				2.2		%
Operating margin %			4.0		%				3.5		%				0.5		%
Adjusted operating margin % (2)			4.0		%				4.4		%				(0.4)		%
Pretax margin %			2.7		%				2.3		%				0.4		%
Adjusted pretax margin % (2)			2.7		%				3.2		%				(0.5)		%
Floorplan expense:
Floorplan interest expense			$	66.3					$	77.0					$	(10.7)					(13.9)		%							$	0.5					(14.5)		%
Less: Floorplan assistance (3)			64.9						66.5						(1.5)						(2.3)		%							—						(2.4)		%
Net floorplan expense			$	1.4					$	10.5					$	(9.1)														$	0.5

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

(3) Floorplan assistance is included within New vehicle retail Gross profit above and New vehicle retail Cost of sales in our Condensed Consolidated Statements of Operations.

NM — Not Meaningful

13

Group 1 Automotive, Inc.
Reported Operating Data — U.S.
(Unaudited)
(In millions, except unit data)
						Three Months Ended September 30,
						2026						2025						Increase/(Decrease)						% Change
Revenues:
New vehicle retail sales						$	2,050.5					$	2,187.0					$	(136.6)					(6.2)		%
Used vehicle retail sales						1,146.8						1,230.4						(83.5)						(6.8)		%
Used vehicle wholesale sales						74.3						90.9						(16.6)						(18.2)		%
Total used						1,221.2						1,321.3						(100.1)						(7.6)		%
Parts and service sales						538.4						567.6						(29.2)						(5.1)		%
F&I, net						181.0						202.1						(21.0)						(10.4)		%
Total revenues						$	3,991.1					$	4,277.9					$	(286.9)					(6.7)		%
Gross profit:
New vehicle retail sales						$	121.1					$	138.1					$	(17.0)					(12.3)		%
Used vehicle retail sales						54.4						60.6						(6.2)						(10.2)		%
Used vehicle wholesale sales						—						1.1						(1.1)						(103.9)		%
Total used						54.4						61.7						(7.3)						(11.8)		%
Parts and service sales						301.1						313.1						(12.0)						(3.8)		%
F&I, net						181.0						202.1						(21.0)						(10.4)		%
Total gross profit						$	657.7					$	715.0					$	(57.3)					(8.0)		%
Gross margin:
New vehicle retail sales						5.9		%				6.3		%				(0.4)		%
Used vehicle retail sales						4.7		%				4.9		%				(0.2)		%
Used vehicle wholesale sales						(0.1)		%				1.2		%				(1.2)		%
Total used						4.5		%				4.7		%				(0.2)		%
Parts and service sales						55.9		%				55.2		%				0.8		%
Total gross margin						16.5		%				16.7		%				(0.2)		%
Units sold:
Retail new vehicles sold						39,275						41,582						(2,307)						(5.5)		%
Retail used vehicles sold						35,662						39,636						(3,974)						(10.0)		%
Wholesale used vehicles sold						8,749						9,984						(1,235)						(12.4)		%
Total used						44,411						49,620						(5,209)						(10.5)		%
Average sales price per unit sold:
New vehicle retail						$	52,208					$	52,595					$	(388)					(0.7)		%
Used vehicle retail						$	32,158					$	31,042					$	1,117					3.6		%
Gross profit per unit sold:
New vehicle retail sales						$	3,084					$	3,322					$	(238)					(7.2)		%
Used vehicle retail sales						$	1,527					$	1,529					$	(3)					(0.2)		%
Used vehicle wholesale sales						$	(5)					$	108					$	(112)					(104.5)		%
Total used						$	1,225					$	1,243					$	(18)					(1.5)		%
F&I PRU						$	2,416					$	2,488					$	(72)					(2.9)		%
Other:
SG&A expenses						$	452.1					$	481.2					$	(29.0)					(6.0)		%
Adjusted SG&A expenses (1)						$	445.2					$	470.7					$	(25.5)					(5.4)		%
SG&A as % gross profit						68.7		%				67.3		%				1.5		%
Adjusted SG&A as % gross profit (1)						67.7		%				65.8		%				1.9		%

(1) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

14

Group 1 Automotive, Inc.
Reported Operating Data — U.S.
(Unaudited)
(In millions, except unit data)
						Nine Months Ended September 30,
						2026						2025						Increase/(Decrease)						% Change
Revenues:
New vehicle retail sales						$	5,925.5					$	6,288.7					$	(363.2)					(5.8)		%
Used vehicle retail sales						3,377.2						3,577.9						(200.8)						(5.6)		%
Used vehicle wholesale sales						256.6						269.4						(12.8)						(4.8)		%
Total used						3,633.8						3,847.3						(213.6)						(5.6)		%
Parts and service sales						1,596.6						1,654.4						(57.8)						(3.5)		%
F&I, net						532.4						586.5						(54.1)						(9.2)		%
Total revenues						$	11,688.3					$	12,376.9					$	(688.6)					(5.6)		%
Gross profit:
New vehicle retail sales						$	361.6					$	419.2					$	(57.6)					(13.7)		%
Used vehicle retail sales						170.3						195.0						(24.8)						(12.7)		%
Used vehicle wholesale sales						5.2						6.2						(1.0)						(15.6)		%
Total used						175.5						201.2						(25.7)						(12.8)		%
Parts and service sales						893.9						911.8						(17.9)						(2.0)		%
F&I, net						532.4						586.5						(54.1)						(9.2)		%
Total gross profit						$	1,963.4					$	2,118.7					$	(155.3)					(7.3)		%
Gross margin:
New vehicle retail sales						6.1		%				6.7		%				(0.6)		%
Used vehicle retail sales						5.0		%				5.5		%				(0.4)		%
Used vehicle wholesale sales						2.0		%				2.3		%				(0.3)		%
Total used						4.8		%				5.2		%				(0.4)		%
Parts and service sales						56.0		%				55.1		%				0.9		%
Total gross margin						16.8		%				17.1		%				(0.3)		%
Units sold:
Retail new vehicles sold						112,490						120,484						(7,994)						(6.6)		%
Retail used vehicles sold						106,020						117,914						(11,894)						(10.1)		%
Wholesale used vehicles sold						27,629						29,862						(2,233)						(7.5)		%
Total used						133,649						147,776						(14,127)						(9.6)		%
Average sales price per unit sold:
New vehicle retail						$	52,676					$	52,195					$	481					0.9		%
Used vehicle retail						$	31,854					$	30,344					$	1,511					5.0		%
Gross profit per unit sold:
New vehicle retail sales						$	3,215					$	3,479					$	(265)					(7.6)		%
Used vehicle retail sales						$	1,606					$	1,654					$	(48)					(2.9)		%
Used vehicle wholesale sales						$	188					$	206					$	(18)					(8.8)		%
Total used						$	1,313					$	1,361					$	(49)					(3.6)		%
F&I PRU						$	2,437					$	2,460					$	(24)					(1.0)		%
Adjusted F&I PRU (1)						$	2,468					$	2,460					$	8					0.3		%
Other:
SG&A expenses						$	1,314.7					$	1,400.2					$	(85.5)					(6.1)		%
Adjusted SG&A expenses (1)						$	1,344.0					$	1,390.1					$	(46.1)					(3.3)		%
SG&A as % gross profit						67.0		%				66.1		%				0.9		%
Adjusted SG&A as % gross profit (1)						68.2		%				65.6		%				2.6		%

(1) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

15

Group 1 Automotive, Inc.
Reported Operating Data — U.K.
(Unaudited)
(In millions, except unit data)
			Three Months Ended September 30,
			2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales			$	614.7					$	620.4					$	(5.7)					(0.9)		%							$	(2.7)					(0.5)		%
Used vehicle retail sales			544.2						621.8						(77.5)						(12.5)		%							(1.7)						(12.2)		%
Used vehicle wholesale sales			49.6						57.5						(7.8)						(13.6)		%							(0.1)						(13.4)		%
Total used			593.9						679.3						(85.4)						(12.6)		%							(1.9)						(12.3)		%
Parts and service sales			162.3						166.3						(4.1)						(2.4)		%							(0.5)						(2.1)		%
F&I, net			34.8						38.8						(4.0)						(10.4)		%							(0.1)						(10.0)		%
Total revenues			$	1,405.6					$	1,504.8					$	(99.1)					(6.6)		%							$	(5.3)					(6.2)		%
Gross profit:
New vehicle retail sales			$	48.8					$	48.0					$	0.8					1.6		%							$	(0.2)					2.1		%
Used vehicle retail sales			25.4						24.8						0.7						2.6		%							(0.1)						2.9		%
Used vehicle wholesale sales			(2.7)						(1.3)						(1.4)						(103.5)		%							—						(104.6)		%
Total used			22.7						23.4						(0.7)						(3.0)		%							(0.1)						(2.8)		%
Parts and service sales			90.9						94.5						(3.7)						(3.9)		%							(0.3)						(3.5)		%
F&I, net			34.8						38.8						(4.0)						(10.4)		%							(0.1)						(10.0)		%
Total gross profit			$	197.1					$	204.7					$	(7.6)					(3.7)		%							$	(0.7)					(3.3)		%
Gross margin:
New vehicle retail sales			7.9		%				7.7		%				0.2		%
Used vehicle retail sales			4.7		%				4.0		%				0.7		%
Used vehicle wholesale sales			(5.4)		%				(2.3)		%				(3.1)		%
Total used			3.8		%				3.5		%				0.4		%
Parts and service sales			56.0		%				56.8		%				(0.8)		%
Total gross margin			14.0		%				13.6		%				0.4		%
Units sold:
Retail new vehicles sold (1)			15,984						15,687						297						1.9		%
Retail used vehicles sold (1)			17,681						19,938						(2,257)						(11.3)		%
Wholesale used vehicles sold			5,552						6,034						(482)						(8.0)		%
Total used			23,233						25,972						(2,739)						(10.5)		%
Average sales price per unit sold:
New vehicle retail (1)			$	47,756					$	45,326					$	2,430					5.4		%							$	(211)					5.8		%
Used vehicle retail (1)			$	30,906					$	31,251					$	(345)					(1.1)		%							$	(99)					(0.8)		%
Gross profit per unit sold:
New vehicle retail sales			$	3,051					$	3,059					$	(8)					(0.3)		%							$	(15)					0.2		%
Used vehicle retail sales			$	1,437					$	1,242					$	196					15.7		%							$	(4)					16.1		%
Used vehicle wholesale sales			$	(485)					$	(219)					$	(265)					(121.2)		%							$	2					(122.3)		%
Total used			$	978					$	902					$	76					8.4		%							$	(2)					8.7		%
F&I PRU			$	1,033					$	1,089					$	(56)					(5.1)		%							$	(4)					(4.8)		%
Other:
SG&A expenses			$	166.0					$	173.7					$	(7.7)					(4.4)		%							$	(0.5)					(4.1)		%
Adjusted SG&A expenses (2)			$	165.3					$	174.3					$	(9.0)					(5.2)		%							$	(0.5)					(4.9)		%
SG&A as % gross profit			84.2		%				84.9		%				(0.6)		%
Adjusted SG&A as % gross profit (2)			83.9		%				85.2		%				(1.3)		%

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

16

Group 1 Automotive, Inc.
Reported Operating Data — U.K.
(Unaudited)
(In millions, except unit data)
			Nine Months Ended September 30,
			2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales			$	1,908.2					$	1,934.1					$	(26.0)					(1.3)		%							$	39.2					(3.4)		%
Used vehicle retail sales			1,807.1						1,877.8						(70.7)						(3.8)		%							41.0						(5.9)		%
Used vehicle wholesale sales			168.4						194.4						(26.0)						(13.4)		%							3.6						(15.2)		%
Total used			1,975.4						2,072.2						(96.7)						(4.7)		%							44.5						(6.8)		%
Parts and service sales			500.9						490.0						10.9						2.2		%							11.4						(0.1)		%
F&I, net			116.1						118.3						(2.3)						(1.9)		%							2.5						(4.1)		%
Total revenues			$	4,500.6					$	4,614.6					$	(114.1)					(2.5)		%							$	97.7					(4.6)		%
Gross profit:
New vehicle retail sales			$	154.5					$	154.9					$	(0.4)					(0.3)		%							$	3.1					(2.2)		%
Used vehicle retail sales			79.2						80.3						(1.1)						(1.3)		%							2.0						(3.8)		%
Used vehicle wholesale sales			(7.1)						(4.4)						(2.8)						(62.9)		%							(0.1)						(59.6)		%
Total used			72.1						75.9						(3.8)						(5.0)		%							1.8						(7.4)		%
Parts and service sales			287.2						279.6						7.5						2.7		%							6.3						0.4		%
F&I, net			116.1						118.3						(2.3)						(1.9)		%							2.5						(4.1)		%
Total gross profit			$	629.8					$	628.8					$	1.1					0.2		%							$	13.7					(2.0)		%
Gross margin:
New vehicle retail sales			8.1		%				8.0		%				0.1		%
Used vehicle retail sales			4.4		%				4.3		%				0.1		%
Used vehicle wholesale sales			(4.2)		%				(2.3)		%				(2.0)		%
Total used			3.7		%				3.7		%				—		%
Parts and service sales			57.3		%				57.1		%				0.3		%
Total gross margin			14.0		%				13.6		%				0.4		%
Units sold:
Retail new vehicles sold (1)			48,502						48,647						(145)						(0.3)		%
Retail used vehicles sold (1)			57,777						61,518						(3,741)						(6.1)		%
Wholesale used vehicles sold			17,389						19,540						(2,151)						(11.0)		%
Total used			75,166						81,058						(5,892)						(7.3)		%
Average sales price per unit sold:
New vehicle retail (1)			$	48,995					$	45,327					$	3,669					8.1		%							$	1,010					5.9		%
Used vehicle retail (1)			$	31,426					$	30,582					$	844					2.8		%							$	713					0.4		%
Gross profit per unit sold:
New vehicle retail sales			$	3,185					$	3,184					$	1					—		%							$	63					(1.9)		%
Used vehicle retail sales			$	1,372					$	1,305					$	66					5.1		%							$	34					2.5		%
Used vehicle wholesale sales			$	(410)					$	(224)					$	(186)					(83.0)		%							$	(8)					(79.3)		%
Total used			$	960					$	937					$	23					2.4		%							$	24					(0.2)		%
F&I PRU			$	1,092					$	1,074					$	18					1.7		%							$	24					(0.5)		%
Other:
SG&A expenses			$	527.6					$	518.1					$	9.5					1.8		%							$	12.1					(0.5)		%
Adjusted SG&A expenses (2)			$	519.2					$	517.7					$	1.5					0.3		%							$	11.9					(2.0)		%
SG&A as % gross profit			83.8		%				82.4		%				1.4		%
Adjusted SG&A as % gross profit (2)			82.4		%				82.3		%				0.1		%

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

17

Group 1 Automotive, Inc.
Same Store Operating Data — Consolidated
(Unaudited)
(In millions, except unit data)
						Three Months Ended September 30,
						2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales						$	2,608.1					$	2,629.9					$	(21.8)					(0.8)		%							$	(2.6)					(0.7)		%
Used vehicle retail sales						1,658.7						1,763.0						(104.3)						(5.9)		%							(1.7)						(5.8)		%
Used vehicle wholesale sales						117.2						137.5						(20.3)						(14.8)		%							(0.1)						(14.7)		%
Total used						1,775.9						1,900.5						(124.6)						(6.6)		%							(1.9)						(6.5)		%
Parts and service sales						687.2						673.8						13.4						2.0		%							(0.5)						2.1		%
F&I, net						211.4						232.1						(20.7)						(8.9)		%							(0.1)						(8.9)		%
Total revenues						$	5,282.7					$	5,436.4					$	(153.7)					(2.8)		%							$	(5.2)					(2.7)		%
Gross profit:
New vehicle retail sales						$	166.5					$	176.4					$	(9.9)					(5.6)		%							$	(0.2)					(5.5)		%
Used vehicle retail sales						78.7						82.0						(3.3)						(4.0)		%							(0.1)						(3.9)		%
Used vehicle wholesale sales						(2.2)						0.2						(2.4)						NM									—						NM
Total used						76.5						82.2						(5.7)						(7.0)		%							(0.1)						(6.9)		%
Parts and service sales						383.1						382.6						0.5						0.1		%							(0.3)						0.2		%
F&I, net						211.4						232.1						(20.7)						(8.9)		%							(0.1)						(8.9)		%
Total gross profit						$	837.6					$	873.4					$	(35.8)					(4.1)		%							$	(0.7)					(4.0)		%
Gross margin:
New vehicle retail sales						6.4		%				6.7		%				(0.3)		%
Used vehicle retail sales						4.7		%				4.7		%				0.1		%
Used vehicle wholesale sales						(1.9)		%				0.2		%				(2.1)		%
Total used						4.3		%				4.3		%				—		%
Parts and service sales						55.8		%				56.8		%				(1.0)		%
Total gross margin						15.9		%				16.1		%				(0.2)		%
Units sold:
Retail new vehicles sold (1)						53,933						54,615						(682)						(1.2)		%
Retail used vehicles sold (1)						52,272						57,153						(4,881)						(8.5)		%
Wholesale used vehicles sold						13,872						15,287						(1,415)						(9.3)		%
Total used						66,144						72,440						(6,296)						(8.7)		%
Average sales price per unit sold:
New vehicle retail (1)						$	51,337					$	50,000					$	1,337					2.7		%							$	(51)					2.8		%
Used vehicle retail (1)						$	31,776					$	30,868					$	908					2.9		%							$	(27)					3.0		%
Gross profit per unit sold:
New vehicle retail sales						$	3,088					$	3,230					$	(142)					(4.4)		%							$	(4)					(4.3)		%
Used vehicle retail sales						$	1,506					$	1,435					$	71					5.0		%							$	(1)					5.1		%
Used vehicle wholesale sales						$	(160)					$	15					$	(174)					NM									$	1					NM
Total used						$	1,157					$	1,135					$	22					1.9		%							$	(1)					2.0		%
F&I PRU						$	1,991					$	2,077					$	(86)					(4.1)		%							$	(1)					(4.1)		%
Other:
SG&A expenses						$	604.0					$	612.9					$	(8.9)					(1.5)		%							$	(0.5)					(1.4)		%
Adjusted SG&A expenses (2)						$	595.3					$	602.4					$	(7.1)					(1.2)		%							$	(0.5)					(1.1)		%
SG&A as % gross profit						72.1		%				70.2		%				1.9		%
Adjusted SG&A as % gross profit (2)						71.1		%				69.0		%				2.1		%
Operating margin %						3.7		%				4.2		%				(0.5)		%
Adjusted operating margin % (2)						4.0		%				4.5		%				(0.5)		%

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

NM — Not Meaningful

18

Group 1 Automotive, Inc.
Same Store Operating Data — Consolidated
(Unaudited)
(In millions, except unit data)
						Nine Months Ended September 30,
						2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales						$	7,592.6					$	7,789.7					$	(197.1)					(2.5)		%							$	39.4					(3.0)		%
Used vehicle retail sales						5,024.9						5,203.3						(178.4)						(3.4)		%							41.0						(4.2)		%
Used vehicle wholesale sales						396.2						422.4						(26.3)						(6.2)		%							3.1						(7.0)		%
Total used						5,421.1						5,625.8						(204.7)						(3.6)		%							44.0						(4.4)		%
Parts and service sales						2,037.8						1,981.1						56.6						2.9		%							11.3						2.3		%
F&I, net						631.9						680.5						(48.7)						(7.1)		%							2.6						(7.5)		%
Total revenues						$	15,683.3					$	16,077.1					$	(393.8)					(2.4)		%							$	97.3					(3.1)		%
Gross profit:
New vehicle retail sales						$	498.7					$	548.3					$	(49.6)					(9.0)		%							$	3.1					(9.6)		%
Used vehicle retail sales						243.5						265.0						(21.5)						(8.1)		%							1.9						(8.8)		%
Used vehicle wholesale sales						(0.6)						3.4						(4.0)						(117.8)		%							(0.1)						(114.8)		%
Total used						242.9						268.4						(25.5)						(9.5)		%							1.8						(10.2)		%
Parts and service sales						1,144.7						1,123.2						21.5						1.9		%							6.2						1.4		%
F&I, net						631.9						680.5						(48.7)						(7.1)		%							2.6						(7.5)		%
Total gross profit						$	2,518.1					$	2,620.4					$	(102.3)					(3.9)		%							$	13.6					(4.4)		%
Gross margin:
New vehicle retail sales						6.6		%				7.0		%				(0.5)		%
Used vehicle retail sales						4.8		%				5.1		%				(0.2)		%
Used vehicle wholesale sales						(0.2)		%				0.8		%				(1.0)		%
Total used						4.5		%				4.8		%				(0.3)		%
Parts and service sales						56.2		%				56.7		%				(0.5)		%
Total gross margin						16.1		%				16.3		%				(0.2)		%
Units sold:
Retail new vehicles sold (1)						156,585						161,555						(4,970)						(3.1)		%
Retail used vehicles sold (1)						159,307						171,842						(12,535)						(7.3)		%
Wholesale used vehicles sold						43,445						46,499						(3,054)						(6.6)		%
Total used						202,752						218,341						(15,589)						(7.1)		%
Average sales price per unit sold:
New vehicle retail (1)						$	51,652					$	50,021					$	1,631					3.3		%							$	265					2.7		%
Used vehicle retail (1)						$	31,597					$	30,297					$	1,300					4.3		%							$	258					3.4		%
Gross profit per unit sold:
New vehicle retail sales						$	3,185					$	3,394					$	(209)					(6.2)		%							$	20					(6.7)		%
Used vehicle retail sales						$	1,528					$	1,542					$	(14)					(0.9)		%							$	12					(1.7)		%
Used vehicle wholesale sales						$	(14)					$	73					$	(87)					(119.1)		%							$	(2)					(115.9)		%
Total used						$	1,198					$	1,229					$	(31)					(2.6)		%							$	9					(3.3)		%
F&I PRU						$	2,000					$	2,041					$	(41)					(2.0)		%							$	8					(2.4)		%
Adjusted F&I PRU (2)						$	2,022					$	2,041					$	(19)					(0.9)		%							$	8					(1.3)		%
Other:
SG&A expenses						$	1,813.2					$	1,812.9					$	0.3					—		%							$	11.7					(0.6)		%
Adjusted SG&A expenses (2)						$	1,796.0					$	1,794.8					$	1.3					0.1		%							$	11.7					(0.6)		%
SG&A as % gross profit						72.0		%				69.2		%				2.8		%
Adjusted SG&A as % gross profit (2)						71.1		%				68.5		%				2.6		%
Operating margin %						3.9		%				4.5		%				(0.6)		%
Adjusted operating margin % (2)						4.1		%				4.6		%				(0.5)		%

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

19

Group 1 Automotive, Inc.
Same Store Operating Data — U.S.
(Unaudited)
(In millions, except unit data)
			Three Months Ended September 30,
			2026						2025						Increase/(Decrease)						% Change
Revenues:
New vehicle retail sales			$	2,013.3					$	2,084.5					$	(71.2)					(3.4)		%
Used vehicle retail sales			1,124.1						1,200.6						(76.5)						(6.4)		%
Used vehicle wholesale sales			73.1						85.5						(12.3)						(14.4)		%
Total used			1,197.2						1,286.1						(88.9)						(6.9)		%
Parts and service sales			527.5						523.6						3.8						0.7		%
F&I, net			177.2						197.8						(20.6)						(10.4)		%
Total revenues			$	3,915.1					$	4,092.0					$	(176.9)					(4.3)		%
Gross profit:
New vehicle retail sales			$	118.5					$	133.6					$	(15.1)					(11.3)		%
Used vehicle retail sales			54.1						59.1						(5.0)						(8.5)		%
Used vehicle wholesale sales			0.2						1.1						(0.9)						(84.4)		%
Total used			54.2						60.2						(6.0)						(9.9)		%
Parts and service sales			294.5						297.0						(2.5)						(0.8)		%
F&I, net			177.2						197.8						(20.6)						(10.4)		%
Total gross profit			$	644.5					$	688.6					$	(44.2)					(6.4)		%
Gross margin:
New vehicle retail sales			5.9		%				6.4		%				(0.5)		%
Used vehicle retail sales			4.8		%				4.9		%				(0.1)		%
Used vehicle wholesale sales			0.2		%				1.3		%				(1.1)		%
Total used			4.5		%				4.7		%				(0.2)		%
Parts and service sales			55.8		%				56.7		%				(0.9)		%
Total gross margin			16.5		%				16.8		%				(0.4)		%
Units sold:
Retail new vehicles sold			38,466						40,307						(1,841)						(4.6)		%
Retail used vehicles sold			35,005						38,889						(3,884)						(10.0)		%
Wholesale used vehicles sold			8,609						9,771						(1,162)						(11.9)		%
Total used			43,614						48,660						(5,046)						(10.4)		%
Average sales price per unit sold:
New vehicle retail			$	52,340					$	51,716					$	625					1.2		%
Used vehicle retail			$	32,112					$	30,873					$	1,239					4.0		%
Gross profit per unit sold:
New vehicle retail sales			$	3,082					$	3,315					$	(233)					(7.0)		%
Used vehicle retail sales			$	1,544					$	1,520					$	25					1.6		%
Used vehicle wholesale sales			$	20					$	113					$	(93)					(82.3)		%
Total used			$	1,243					$	1,237					$	6					0.5		%
F&I PRU			$	2,411					$	2,497					$	(86)					(3.5)		%
Other:
SG&A expenses			$	443.8					$	459.7					$	(15.8)					(3.4)		%
Adjusted SG&A expenses (1)			$	435.1					$	449.2					$	(14.0)					(3.1)		%
SG&A as % gross profit			68.9		%				66.8		%				2.1		%
Adjusted SG&A as % gross profit (1)			67.5		%				65.2		%				2.3		%

(1) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

20

Group 1 Automotive, Inc.
Same Store Operating Data — U.S.
(Unaudited)
(In millions, except unit data)
			Nine Months Ended September 30,
			2026						2025						Increase/(Decrease)						% Change
Revenues:
New vehicle retail sales			$	5,740.5					$	6,018.7					$	(278.2)					(4.6)		%
Used vehicle retail sales			3,249.8						3,476.1						(226.2)						(6.5)		%
Used vehicle wholesale sales			245.8						247.8						(2.0)						(0.8)		%
Total used			3,495.7						3,723.9						(228.2)						(6.1)		%
Parts and service sales			1,548.3						1,532.5						15.8						1.0		%
F&I, net			517.6						572.5						(54.8)						(9.6)		%
Total revenues			$	11,302.1					$	11,847.5					$	(545.5)					(4.6)		%
Gross profit:
New vehicle retail sales			$	347.5					$	405.7					$	(58.2)					(14.3)		%
Used vehicle retail sales			166.0						190.2						(24.2)						(12.7)		%
Used vehicle wholesale sales			5.5						5.9						(0.4)						(6.2)		%
Total used			171.5						196.0						(24.5)						(12.5)		%
Parts and service sales			864.7						866.1						(1.4)						(0.2)		%
F&I, net			517.6						572.5						(54.8)						(9.6)		%
Total gross profit			$	1,901.3					$	2,040.2					$	(138.9)					(6.8)		%
Gross margin:
New vehicle retail sales			6.1		%				6.7		%				(0.7)		%
Used vehicle retail sales			5.1		%				5.5		%				(0.4)		%
Used vehicle wholesale sales			2.2		%				2.4		%				(0.1)		%
Total used			4.9		%				5.3		%				(0.4)		%
Parts and service sales			55.9		%				56.5		%				(0.7)		%
Total gross margin			16.8		%				17.2		%				(0.4)		%
Units sold:
Retail new vehicles sold			109,448						116,491						(7,043)						(6.0)		%
Retail used vehicles sold			102,649						114,886						(12,237)						(10.7)		%
Wholesale used vehicles sold			26,829						28,779						(1,950)						(6.8)		%
Total used			129,478						143,665						(14,187)						(9.9)		%
Average sales price per unit sold:
New vehicle retail			$	52,450					$	51,666					$	783					1.5		%
Used vehicle retail			$	31,660					$	30,257					$	1,403					4.6		%
Gross profit per unit sold:
New vehicle retail sales			$	3,175					$	3,482					$	(308)					(8.8)		%
Used vehicle retail sales			$	1,617					$	1,655					$	(38)					(2.3)		%
Used vehicle wholesale sales			$	205					$	204					$	1					0.6		%
Total used			$	1,325					$	1,365					$	(40)					(2.9)		%
F&I PRU			$	2,441					$	2,474					$	(34)					(1.4)		%
Adjusted F&I PRU (1)			$	2,473					$	2,474					$	(2)					(0.1)		%
Other:
SG&A expenses			$	1,314.1					$	1,344.2					$	(30.0)					(2.2)		%
Adjusted SG&A expenses (1)			$	1,297.6					$	1,327.0					$	(29.4)					(2.2)		%
SG&A as % gross profit			69.1		%				65.9		%				3.2		%
Adjusted SG&A as % gross profit (1)			68.0		%				65.0		%				3.0		%

(1) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

21

Group 1 Automotive, Inc.
Same Store Operating Data — U.K.
(Unaudited)
(In millions, except unit data)
			Three Months Ended September 30,
			2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales			$	594.8					$	545.4					$	49.4					9.1		%							$	(2.6)					9.5		%
Used vehicle retail sales			534.6						562.4						(27.8)						(4.9)		%							(1.7)						(4.6)		%
Used vehicle wholesale sales			44.1						52.0						(8.0)						(15.3)		%							(0.1)						(15.0)		%
Total used			578.7						614.5						(35.7)						(5.8)		%							(1.9)						(5.5)		%
Parts and service sales			159.7						150.2						9.6						6.4		%							(0.5)						6.7		%
F&I, net			34.3						34.3						(0.1)						(0.2)		%							(0.1)						0.2		%
Total revenues			$	1,367.5					$	1,344.3					$	23.2					1.7		%							$	(5.2)					2.1		%
Gross profit:
New vehicle retail sales			$	48.0					$	42.8					$	5.2					12.1		%							$	(0.2)					12.6		%
Used vehicle retail sales			24.7						22.9						1.8						7.7		%							(0.1)						8.0		%
Used vehicle wholesale sales			(2.4)						(0.9)						(1.5)						NM									—						NM
Total used			22.3						22.0						0.3						1.1		%							(0.1)						1.4		%
Parts and service sales			88.6						85.6						3.0						3.5		%							(0.3)						3.9		%
F&I, net			34.3						34.3						(0.1)						(0.2)		%							(0.1)						0.2		%
Total gross profit			$	193.1					$	184.8					$	8.4					4.5		%							$	(0.7)					4.9		%
Gross margin:
New vehicle retail sales			8.1		%				7.9		%				0.2		%
Used vehicle retail sales			4.6		%				4.1		%				0.5		%
Used vehicle wholesale sales			(5.4)		%				(1.7)		%				(3.7)		%
Total used			3.8		%				3.6		%				0.3		%
Parts and service sales			55.5		%				57.0		%				(1.5)		%
Total gross margin			14.1		%				13.7		%				0.4		%
Units sold:
Retail new vehicles sold (1)			15,467						14,308						1,159						8.1		%
Retail used vehicles sold (1)			17,267						18,264						(997)						(5.5)		%
Wholesale used vehicles sold			5,263						5,516						(253)						(4.6)		%
Total used			22,530						23,780						(1,250)						(5.3)		%
Average sales price per unit sold:
New vehicle retail (1)			$	48,155					$	44,288					$	3,868					8.7		%							$	(213)					9.2		%
Used vehicle retail (1)			$	31,092					$	30,859					$	233					0.8		%							$	(100)					1.1		%
Gross profit per unit sold:
New vehicle retail sales			$	3,103					$	2,993					$	110					3.7		%							$	(15)					4.2		%
Used vehicle retail sales			$	1,428					$	1,254					$	174					13.9		%							$	(4)					14.2		%
Used vehicle wholesale sales			$	(454)					$	(161)					$	(294)					NM									$	3					NM
Total used			$	988					$	926					$	63					6.8		%							$	(3)					7.0		%
F&I PRU			$	1,046					$	1,053					$	(7)					(0.7)		%							$	(4)					(0.3)		%
Other:
SG&A expenses			$	160.2					$	153.2					$	6.9					4.5		%							$	(0.5)					4.8		%
SG&A as % gross profit			82.9		%				82.9		%				—		%

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

NM — Not Meaningful

22

Group 1 Automotive, Inc.
Same Store Operating Data — U.K.
(Unaudited)
(In millions, except unit data)
			Nine Months Ended September 30,
			2026						2025						Increase/ (Decrease)						% Change									Currency Impact on Current Period Results						Constant Currency % Change
Revenues:
New vehicle retail sales			$	1,852.1					$	1,771.0					$	81.0					4.6		%							$	39.4					2.4		%
Used vehicle retail sales			1,775.1						1,727.3						47.8						2.8		%							41.0						0.4		%
Used vehicle wholesale sales			150.3						174.6						(24.3)						(13.9)		%							3.1						(15.7)		%
Total used			1,925.4						1,901.9						23.6						1.2		%							44.0						(1.1)		%
Parts and service sales			489.5						448.7						40.9						9.1		%							11.3						6.6		%
F&I, net			114.2						108.0						6.2						5.7		%							2.6						3.3		%
Total revenues			$	4,381.3					$	4,229.6					$	151.7					3.6		%							$	97.3					1.3		%
Gross profit:
New vehicle retail sales			$	151.2					$	142.6					$	8.6					6.0		%							$	3.1					3.9		%
Used vehicle retail sales			77.5						74.8						2.6						3.5		%							1.9						1.0		%
Used vehicle wholesale sales			(6.1)						(2.5)						(3.7)						(148.5)		%							(0.1)						(144.3)		%
Total used			71.4						72.4						(1.0)						(1.4)		%							1.8						(3.9)		%
Parts and service sales			280.0						257.1						22.8						8.9		%							6.2						6.5		%
F&I, net			114.2						108.0						6.2						5.7		%							2.6						3.3		%
Total gross profit			$	616.8					$	580.2					$	36.6					6.3		%							$	13.6					4.0		%
Gross margin:
New vehicle retail sales			8.2		%				8.1		%				0.1		%
Used vehicle retail sales			4.4		%				4.3		%				—		%
Used vehicle wholesale sales			(4.1)		%				(1.4)		%				(2.7)		%
Total used			3.7		%				3.8		%				(0.1)		%
Parts and service sales			57.2		%				57.3		%				(0.1)		%
Total gross margin			14.1		%				13.7		%				0.4		%
Units sold:
Retail new vehicles sold (1)			47,137						45,064						2,073						4.6		%
Retail used vehicles sold (1)			56,658						56,956						(298)						(0.5)		%
Wholesale used vehicles sold			16,616						17,720						(1,104)						(6.2)		%
Total used			73,274						74,676						(1,402)						(1.9)		%
Average sales price per unit sold:
New vehicle retail (1)			$	49,288					$	45,076					$	4,212					9.3		%							$	1,051					7.0		%
Used vehicle retail (1)			$	31,483					$	30,379					$	1,104					3.6		%							$	728					1.2		%
Gross profit per unit sold:
New vehicle retail sales			$	3,209					$	3,165					$	43					1.4		%							$	65					(0.7)		%
Used vehicle retail sales			$	1,367					$	1,314					$	54					4.1		%							$	33					1.6		%
Used vehicle wholesale sales			$	(368)					$	(139)					$	(229)					NM									$	(6)					NM
Total used			$	974					$	969					$	5					0.5		%							$	24					(2.0)		%
F&I PRU			$	1,101					$	1,059					$	41					3.9		%							$	25					1.6		%
Other:
SG&A expenses			$	499.1					$	468.7					$	30.4					6.5		%							$	11.7					4.0		%
Adjusted SG&A expenses (2)			$	498.4					$	467.7					$	30.7					6.6		%							$	11.7					4.1		%
SG&A as % gross profit			80.9		%				80.8		%				0.1		%
Adjusted SG&A as % gross profit (2)			80.8		%				80.6		%				0.2		%

(1) Retail new and used vehicle units sold include new and used vehicle agency units. The agency units and related revenues are excluded from the calculation of the average sales price per unit sold for new and used vehicles due to their net presentation within revenues. The agency units and related net revenues are included in the calculation of gross profit per unit sold.

(2) See the section in this release titled “Reconciliation of Certain Non-GAAP Financial Measures” for the GAAP to non-GAAP reconciliation of these figures.

NM — Not Meaningful

23

Group 1 Automotive, Inc.
Reconciliation of Certain Non-GAAP Financial Measures — Consolidated
(Unaudited)
(In millions, except per share data)
			Three Months Ended September 30, 2026
			U.S. GAAP																		Catastrophic events						Dealership and real estate transactions												Restructuring charges						Acquisition costs						Legal items and other professional fees																								Asset impairments																								Non-GAAP adjusted
SG&A expenses			$	618.2																	$	(0.5)					$	1.0											$	—					$	(7.1)					$	(1.1)																							$	—																							$	610.5
Asset impairments			$	7.0																	$	—					$	(0.2)											$	—					$	—					$	—																							$	(6.8)																							$	—
Restructuring charges			$	0.1																	$	—					$	—											$	(0.1)					$	—					$	—																							$	—																							$	—
Income (loss) from operations			$	200.7																	$	0.5					$	(0.8)											$	0.1					$	7.1					$	1.1																							$	6.8																							$	215.4
Income (loss) before income taxes			$	131.5																	$	0.5					$	(0.8)											$	0.1					$	7.1					$	1.1																							$	6.8																							$	146.2
Less: Provision for income taxes			28.7																		0.1						1.8												—						1.7						0.2																								1.6																								34.1
Net income (loss) from continuing operations			102.9																		0.4						(2.7)												—						5.4						0.8																								5.2																								112.1
Less: Earnings allocated to participating securities			0.9																		—						—												—						—						—																								—																								1.0
Net income (loss) from continuing operations available to diluted common shares			$	102.0																	$	0.4					$	(2.6)											$	—					$	5.4					$	0.8																							$	5.2																							$	111.1
Diluted earnings (loss) per common share from continuing operations			$	8.59																	$	0.03					$	(0.22)											$	—					$	0.45					$	0.07																							$	0.43																							$	9.36
Effective tax rate			21.8		%																																																																																														23.3		%
SG&A as % gross profit (1)			72.3		%																																																																																														71.4		%
Operating margin (2)			3.7		%																																																																																														3.9		%
Pretax margin (3)			2.4		%																																																																																														2.7		%
Same Store SG&A expenses			$	604.0																	$	(0.5)					$	—											$	—					$	(7.1)					$	(1.1)																							$	—																							$	595.3
Same Store SG&A as % gross profit (1)			72.1		%																																																																																														71.1		%
Same Store income from operations			$	198.5																	$	0.5					$	—											$	—					$	7.1					$	1.1																							$	6.8																							$	214.0
Same Store operating margin (2)			3.7		%																																																																																														4.0		%

						U.S. GAAP						Non-GAAP adjustments						Non-GAAP adjusted
Net income from discontinued operations						$	—					$	—					$	—
Less: Earnings allocated to participating securities						—						—						—
Net income from discontinued operations available to diluted common shares						$	—					$	—					$	—
Net income						$	102.9					$	9.2					$	112.1
Less: Earnings allocated to participating securities						0.9						0.1						1.0
Net income available to diluted common shares						$	102.0					$	9.2					$	111.1
Diluted earnings per common share from discontinued operations						$	—					$	—					$	—
Diluted earnings per common share from continuing operations						8.59						0.77						9.36
Diluted earnings per common share						$	8.59					$	0.77					$	9.36

(1) Adjusted SG&A as % of gross profit excludes the impact of SG&A reconciling items above.

(2) Adjusted operating margin excludes the impact of SG&A reconciling items, asset impairment charges and restructuring charges.

(3) Adjusted pretax margin excludes the impact of SG&A reconciling items, asset impairment charges and restructuring charges.

24

Group 1 Automotive, Inc.
Reconciliation of Certain Non-GAAP Financial Measures — Consolidated
(Unaudited)
(In millions, except per share data)
						Three Months Ended September 30, 2025
						U.S. GAAP												Catastrophic events						Dealership and real estate transactions						Severance costs						Restructuring charges						Acquisition costs						Legal items and other professional fees						Asset impairments and accelerated depreciation																														Non-GAAP adjusted
SG&A expenses						$	654.9											$	0.2					$	0.6					$	(0.4)					$	—					$	(4.3)					$	(6.0)					$	—																													$	645.0
Depreciation and amortization expense						$	31.6											$	—					$	—					$	—					$	—					$	—					$	—					$	(1.6)																													$	30.0
Asset impairments						$	123.9											$	—					$	—					$	—					$	—					$	—					$	—					$	(123.9)																													$	—
Restructuring charges						$	1.6											$	—					$	—					$	—					$	(1.6)					$	—					$	—					$	—																													$	—
Income (loss) from operations						$	107.8											$	(0.2)					$	(0.6)					$	0.4					$	1.6					$	4.3					$	6.0					$	125.5																													$	244.7
Income (loss) before income taxes						$	36.2											$	(0.2)					$	(0.6)					$	0.4					$	1.6					$	4.3					$	6.0					$	125.5																													$	173.1
Less: Provision (benefit) for income taxes						23.0												(0.1)						(0.2)						0.1						—						1.0						1.4						12.6																														38.0
Net income (loss) from continuing operations						13.1												(0.2)						(0.5)						0.3						1.6						3.3						4.6						112.9																														135.1
Less: Earnings allocated to participating securities						0.1												—						—						—						—						—						—						1.2																														1.4
Net income (loss) from continuing operations available to diluted common shares						$	13.0											$	(0.2)					$	(0.5)					$	0.3					$	1.5					$	3.2					$	4.5					$	111.7																													$	133.7
Diluted earnings (loss) per common share from continuing operations						$	1.02											$	(0.01)					$	(0.04)					$	0.02					$	0.12					$	0.25					$	0.35					$	8.73																													$	10.45
Effective tax rate						63.7		%																																																																												21.9		%
SG&A as % gross profit (1)						71.2		%																																																																												70.1		%
Operating margin (2)						1.9		%																																																																												4.2		%
Pretax margin (3)						0.6		%																																																																												3.0		%
Same Store SG&A expenses						$	612.9											$	0.2					$	—					$	(0.4)					$	—					$	(4.3)					$	(6.0)					$	—																													$	602.4
Same Store SG&A as % gross profit (1)						70.2		%																																																																												69.0		%
Same Store income (loss) from operations						$	230.9											$	(0.2)					$	—					$	0.4					$	—					$	4.3					$	6.0					$	1.6																													$	243.0
Same Store operating margin (2)						4.2		%																																																																												4.5		%

						U.S. GAAP						Non-GAAP adjustments						Non-GAAP adjusted
Net loss from discontinued operations						$	(0.2)					$	—					$	(0.2)
Less: Loss allocated to participating securities						—						—						—
Net loss from discontinued operations available to diluted common shares						$	(0.2)					$	—					$	(0.2)
Net income						$	13.0					$	122.0					$	134.9
Less: Earnings allocated to participating securities						0.1						1.3						1.4
Net income available to diluted common shares						$	12.8					$	120.7					$	133.5
Diluted loss per common share from discontinued operations						$	(0.01)					$	—					$	(0.01)
Diluted earnings per common share from continuing operations						1.02						9.43						10.45
Diluted earnings per common share						$	1.00					$	9.43					$	10.43

(1) Adjusted SG&A as % of gross profit excludes the impact of SG&A reconciling items above.

(2) Adjusted operating margin excludes the impact of SG&A reconciling items, accelerated depreciation expense, asset impairment charges and restructuring charges.

(3) Adjusted pretax margin excludes the impact of SG&A reconciling items, accelerated depreciation expense, asset impairment charges and restructuring charges.

25

Group 1 Automotive, Inc.
Reconciliation of Certain Non-GAAP Financial Measures — Consolidated
(Unaudited)
(In millions, except per share and unit data)
						Nine Months Ended September 30, 2026
						U.S. GAAP						Non-recurring F&I adjustment						Non-cash gain on interest rate swaps						Catastrophic events						Dealership and real estate transactions						Severance costs						Restructuring charges						Acquisition costs						Legal items and other professional fees																								Asset impairments and accelerated depreciation																		Non-GAAP adjusted
F&I, net						$	648.5					$	6.8					$	—					$	—					$	—					$	—					$	—					$	—					$	—																							$	—																	$	655.3
Total gross profit						$	2,593.2					$	6.8					$	—					$	—					$	—					$	—					$	—					$	—					$	—																							$	—																	$	2,600.0
SG&A expenses						$	1,842.2					$	—					$	—					$	(4.0)					$	38.2					$	(2.7)					$	—					$	(7.4)					$	(3.1)																							$	—																	$	1,863.2
Depreciation and amortization expense						$	93.3					$	—					$	—					$	—					$	—					$	—					$	—					$	—					$	—																							$	(2.0)																	$	91.3
Asset impairments						$	10.5					$	—					$	—					$	—					$	(0.2)					$	—					$	—					$	—					$	—																							$	(10.3)																	$	—
Restructuring charges						$	3.2					$	—					$	—					$	—					$	—					$	—					$	(3.2)					$	—					$	—																							$	—																	$	—
Income (loss) from operations						$	646.3					$	6.8					$	—					$	4.0					$	(38.0)					$	2.7					$	3.2					$	7.4					$	3.1																							$	12.3																	$	647.8
Other interest expense, net						$	143.6					$	—					$	0.8					$	—					$	—					$	—					$	—					$	—					$	—																							$	—																	$	144.4
Income (loss) before income taxes						$	436.4					$	6.8					$	(0.8)					$	4.0					$	(38.0)					$	2.7					$	3.2					$	7.4					$	3.1																							$	12.3																	$	437.1
Less: Provision (benefit) for income taxes						100.7						1.6						(0.2)						0.9						(3.8)						0.6						0.9						1.8						0.7																								2.9																		106.2
Net income (loss) from continuing operations						335.7						5.2						(0.6)						3.0						(34.2)						2.0						2.3						5.7						2.4																								9.4																		330.9
Less: Earnings (loss) allocated to participating securities						3.2						—						—						—						(0.3)						—						—						0.1						—																								0.1																		3.1
Net income (loss) from continuing operations available to diluted common shares						$	332.6					$	5.1					$	(0.6)					$	3.0					$	(33.9)					$	2.0					$	2.3					$	5.6					$	2.4																							$	9.3																	$	327.8
Diluted earnings (loss) per common share from continuing operations						$	28.03					$	0.43					$	(0.05)					$	0.25					$	(2.86)					$	0.17					$	0.19					$	0.48					$	0.20																							$	0.79																	$	27.63
Effective tax rate						23.1		%																																																																																								24.3		%
F&I PRU (1)						$	1,997																																																																																									$	2,018
SG&A as % gross profit (2)						71.0		%																																																																																								71.7		%
Operating margin (3)						4.0		%																																																																																								4.0		%
Pretax margin (4)						2.7		%																																																																																								2.7		%
Same Store F&I net						$	631.9					$	6.8					$	—					$	—					$	—					$	—					$	—					$	—					$	—																							$	—																	$	638.7
Same Store F&I PRU (1)						$	2,000																																																																																									$	2,022
Same Store total gross profit						$	2,518.1					$	6.8					$	—					$	—					$	—					$	—					$	—					$	—					$	—																							$	—																	$	2,524.9
Same Store SG&A expenses						$	1,813.2					$	—					$	—					$	(4.0)					$	—					$	(2.7)					$	—					$	(7.4)					$	(3.1)																							$	—																	$	1,796.0
Same Store SG&A as % gross profit (2)						72.0		%																																																																																								71.1		%
Same Store income from operations						$	608.5					$	6.8					$	—					$	4.0					$	—					$	2.7					$	—					$	7.4					$	3.1																							$	10.8																	$	643.2
Same Store operating margin (3)						3.9		%																																																																																								4.1		%

						U.S. GAAP						Non-GAAP adjustments						Non-GAAP adjusted
Net income from discontinued operations						$	0.7					$	—					$	0.7
Less: Earnings allocated to participating securities						—						—						—
Net income from discontinued operations available to diluted common shares						$	0.7					$	—					$	0.7
Net income (loss)						$	336.4					$	(4.8)					$	331.6
Less: Earnings (loss) allocated to participating securities						3.2						—						3.1
Net income (loss) available to diluted common shares						$	333.2					$	(4.7)					$	328.5
Diluted earnings per common share from discontinued operations						$	0.06					$	—					$	0.06
Diluted earnings (loss) per common share from continuing operations						28.03						(0.40)						27.63
Diluted earnings (loss) per common share						$	28.09					$	(0.40)					$	27.69

(1) Adjusted F&I PRU excludes the impact of the non-recurring F&I adjustment.

(2) Adjusted SG&A as % of gross profit excludes the impact of SG&A reconciling items above.

(3) Adjusted operating margin excludes the impact of the non-recurring F&I adjustment, SG&A reconciling items, accelerated depreciation expense, asset impairment charges and restructuring charges.

(4) Adjusted pretax margin excludes the impact of the non-recurring F&I adjustment, SG&A reconciling items, accelerated depreciation expense, asset impairment charges, restructuring charges and a non-cash gain on interest rate swaps.

26

Group 1 Automotive, Inc.
Reconciliation of Certain Non-GAAP Financial Measures — Consolidated
(Unaudited)
(In millions, except per share data)
						Nine Months Ended September 30, 2025
						U.S. GAAP												Catastrophic events						Dealership and real estate transactions						Severance costs						Restructuring charges						Acquisition costs						Legal items and other professional fees						Asset impairments and accelerated depreciation																														Non-GAAP adjusted
SG&A expenses						$	1,918.2											$	(1.2)					$	7.8					$	(1.4)					$	—					$	(6.1)					$	(9.4)					$	—																													$	1,907.8
Depreciation and amortization expense						$	89.6											$	—					$	—					$	—					$	—					$	—					$	—					$	(3.0)																													$	86.6
Asset impairments						$	124.6											$	—					$	—					$	—					$	—					$	—					$	—					$	(124.6)																													$	—
Restructuring charges						$	20.3											$	—					$	—					$	—					$	(20.3)					$	—					$	—					$	—																													$	—
Income (loss) from operations						$	594.7											$	1.2					$	(7.8)					$	1.4					$	20.3					$	6.1					$	9.4					$	127.6																													$	753.0
Income (loss) before income taxes						$	387.5											$	1.2					$	(7.8)					$	1.4					$	20.3					$	6.1					$	9.4					$	127.6																													$	545.9
Less: Provision (benefit) for income taxes						106.8												0.3						(1.3)						0.1						4.0						1.2						2.3						13.1																														126.4
Net income (loss) from continuing operations						280.7												0.9						(6.4)						1.3						16.3						4.9						7.2						114.5																														419.5
Less: Earnings (loss) allocated to participating securities						3.2												—						(0.1)						—						0.2						0.1						0.1						1.3																														4.8
Net income (loss) from continuing operations available to diluted common shares						$	277.5											$	0.9					$	(6.3)					$	1.3					$	16.1					$	4.8					$	7.1					$	113.2																													$	414.7
Diluted earnings (loss) per common share from continuing operations						$	21.50											$	0.07					$	(0.49)					$	0.10					$	1.25					$	0.37					$	0.55					$	8.77																													$	32.13
Effective tax rate						27.6		%																																																																												23.2		%
SG&A as % gross profit (1)						69.8		%																																																																												69.4		%
Operating margin (2)						3.5		%																																																																												4.4		%
Pretax margin (3)						2.3		%																																																																												3.2		%
Same Store SG&A expenses						$	1,812.9											$	(1.2)					$	—					$	(1.4)					$	—					$	(6.1)					$	(9.4)					$	—																													$	1,794.8
Same Store SG&A as % gross profit (1)						69.2		%																																																																												68.5		%
Same Store income from operations						$	720.0											$	1.2					$	—					$	1.4					$	—					$	6.1					$	9.4					$	6.0																													$	744.1
Same Store operating margin (2)						4.5		%																																																																												4.6		%

						U.S. GAAP						Non-GAAP adjustments						Non-GAAP adjusted
Net income from discontinued operations						$	0.9					$	—					$	0.9
Less: Earnings allocated to participating securities						—						—						—
Net income from discontinued operations available to diluted common shares						$	0.8					$	—					$	0.8
Net income						$	281.6					$	138.8					$	420.3
Less: Earnings allocated to participating securities						3.2						1.6						4.8
Net income available to diluted common shares						$	278.4					$	137.2					$	415.5
Diluted earnings per common share from discontinued operations						$	0.07					$	—					$	0.07
Diluted earnings per common share from continuing operations						21.50						10.63						32.13
Diluted earnings per common share						$	21.57					$	10.63					$	32.20

(1) Adjusted SG&A as % of gross profit excludes the impact of SG&A reconciling items above.

(2) Adjusted operating margin excludes the impact of SG&A reconciling items, accelerated depreciation expense, asset impairment charges and restructuring charges.

(3) Adjusted pretax margin excludes the impact of SG&A reconciling items, accelerated depreciation expense, asset impairment charges and restructuring charges.

27

Group 1 Automotive, Inc.
Reconciliation of Certain Non-GAAP Financial Measures — U.S.
(Unaudited)
(In millions, except unit data)
						Three Months Ended September 30, 2026
						U.S. GAAP												Catastrophic events									Dealership and real estate transactions												Acquisition costs						Legal items and other professional fees																																				Non-GAAP adjusted
SG&A expenses						$	452.1											$	(0.5)								$	1.7											$	(7.1)					$	(1.1)																																			$	445.2
SG&A as % gross profit (1)						68.7		%																																																																									67.7		%
Same Store SG&A expenses						$	443.8											$	(0.5)								$	—											$	(7.1)					$	(1.1)																																			$	435.1
Same Store SG&A as % gross profit (1)						68.9		%																																																																									67.5		%

						Three Months Ended September 30, 2025
						U.S. GAAP						Catastrophic events												Severance costs						Acquisition costs						Legal items and other professional fees																														Non-GAAP adjusted
SG&A expenses						$	481.2					$	0.2											$	(0.4)					$	(4.3)					$	(6.0)																													$	470.7
SG&A as % gross profit (1)						67.3		%																																																										65.8		%
Same Store SG&A expenses						$	459.7					$	0.2											$	(0.4)					$	(4.3)					$	(6.0)																													$	449.2
Same Store SG&A as % gross profit (1)						66.8		%																																																										65.2		%

						Nine Months Ended September 30, 2026
						U.S. GAAP						Non-recurring F&I adjustment						Catastrophic events												Dealership and real estate transactions						Severance costs						Acquisition costs						Legal items and other professional fees																														Non-GAAP adjusted
F&I, net						$	532.4					$	6.8					$	—											$	—					$	—					$	—					$	—																													$	539.2
F&I PRU (2)						$	2,437																																																																							$	2,468
Total gross profit						$	1,963.4					$	6.8					$	—											$	—					$	—					$	—					$	—																													$	1,970.2
SG&A expenses						$	1,314.7					$	—					$	(4.0)											$	45.9					$	(1.9)					$	(7.4)					$	(3.1)																													$	1,344.0
SG&A as % gross profit (1)						67.0		%																																																																						68.2		%
Same Store F&I, net						$	517.6					$	6.8					$	—											$	—					$	—					$	—					$	—																													$	524.4
Same Store F&I PRU (2)						$	2,441																																																																							$	2,473
Same Store total gross profit						$	1,901.3					$	6.8					$	—											$	—					$	—					$	—					$	—																													$	1,908.1
Same Store SG&A expenses						$	1,314.1					$	—					$	(4.0)											$	—					$	(1.9)					$	(7.4)					$	(3.1)																													$	1,297.6
Same Store SG&A as % gross profit (1)						69.1		%																																																																						68.0		%

						Nine Months Ended September 30, 2025
						U.S. GAAP						Catastrophic events						Dealership and real estate transactions						Severance costs						Acquisition costs						Legal items and other professional fees																								Non-GAAP adjusted
SG&A expenses						$	1,400.2					$	(1.2)					$	7.1					$	(1.4)					$	(5.1)					$	(9.4)																							$	1,390.1
SG&A as % gross profit (1)						66.1		%																																																				65.6		%
Same Store SG&A expenses						$	1,344.2					$	(1.2)					$	—					$	(1.4)					$	(5.1)					$	(9.4)																							$	1,327.0
Same Store SG&A as % gross profit (1)						65.9		%																																																				65.0		%

(1) Adjusted SG&A as % of gross profit excludes the impact of SG&A reconciling items above.

(2) Adjusted F&I PRU excludes the impact of the non-recurring F&I adjustment.

28

Group 1 Automotive, Inc.
Reconciliation of Certain Non-GAAP Financial Measures — U.K.
(Unaudited)
(In millions)
						Three Months Ended September 30, 2026
						U.S. GAAP												Dealership and real estate transactions																																																Non-GAAP adjusted
SG&A expenses						$	166.0											$	(0.7)																																															$	165.3
SG&A as % gross profit (1)						84.2		%																																																										83.9		%

						Three Months Ended September 30, 2025
						U.S. GAAP												Dealership and real estate transactions																																										Non-GAAP adjusted
SG&A expenses						$	173.7											$	0.6																																									$	174.3
SG&A as % gross profit (1)						84.9		%																																																				85.2		%

						Nine Months Ended September 30, 2026
						U.S. GAAP												Dealership and real estate transactions						Severance costs																																										Non-GAAP adjusted
SG&A expenses						$	527.6											$	(7.7)					$	(0.7)																																									$	519.2
SG&A as % gross profit (1)						83.8		%																																																										82.4		%
Same Store SG&A expenses						$	499.1											$	—					$	(0.7)																																									$	498.4
Same Store SG&A as % gross profit (1)						80.9		%																																																										80.8		%

						Nine Months Ended September 30, 2025
						U.S. GAAP												Dealership and real estate transactions												Acquisition costs												Non-GAAP adjusted
SG&A expenses						$	518.1											$	0.6											$	(1.0)											$	517.7
SG&A as % gross profit (1)						82.4		%																																		82.3		%
Same Store SG&A expenses						$	468.7											$	—											$	(1.0)											$	467.7
Same Store SG&A as % gross profit (1)						80.8		%																																		80.6		%

(1) Adjusted SG&A as % of gross profit excludes the impact of SG&A reconciling items above.

29

Filing Exhibits & Attachments

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Press Releases

• EX-99.1 Q3 2026 EARNINGS RELEASE 2.6 MB

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• EX-101 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT 1.7 KB
• EX-101 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT 22.3 KB
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