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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the quarterly period ended September 30, 2012

For the Transition Period from             to             

Commission File Number 001 – 32205

CBRE GROUP, INC.

(Exact name of Registrant as specified in its charter)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨.

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x   Accelerated filer ¨   Non-accelerated filer ¨   Smaller reporting company ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x.

The number of shares of Class A common stock outstanding at October 31, 2012 was 329,232,692.

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FORM 10-Q

September 30, 2012

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CBRE GROUP, INC.

CONSOLIDATED BALANCE SHEETS

(Dollars in thousands, except share data)

The accompanying notes are an integral part of these consolidated financial statements.

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CBRE GROUP, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(Dollars in thousands, except share data)

The accompanying notes are an integral part of these consolidated financial statements.

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CBRE GROUP, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(Unaudited)

(Dollars in thousands)

The accompanying notes are an integral part of these consolidated financial statements.

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CBRE GROUP, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(Dollars in thousands)

The accompanying notes are an integral part of these consolidated financial statements.

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CBRE GROUP, INC.

CONSOLIDATED STATEMENT OF EQUITY

(Unaudited)

(Dollars in thousands)

The accompanying notes are an integral part of these consolidated financial statements.

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CBRE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Basis of Presentation

The accompanying consolidated financial statements of CBRE Group, Inc., a Delaware corporation (which may be referred to in these financial statements as the “company”, “we”, “us” and “our”), have been prepared in accordance with the rules applicable to Form 10-Q and include all information and footnotes required for interim financial statement presentation, but do not include all disclosures required under accounting principles generally accepted in the United States (GAAP) for annual financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments, except as otherwise noted) considered necessary for a fair presentation have been included. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, and reported amounts of revenue and expenses. Such estimates include the value of real estate assets, accounts receivable, investments in unconsolidated subsidiaries and assumptions used in the calculation of income taxes, retirement and other post-employment benefits, among others. These estimates and assumptions are based on management’s best judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including consideration of the current economic environment, and adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in these estimates resulting from continuing changes in the economic environment will be reflected in the financial statements in future periods.

The results of operations for the three and nine months ended September 30, 2012 are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2012. The consolidated financial statements and notes to consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2011, which contains the latest available audited consolidated financial statements and notes thereto, which are as of and for the year ended December 31, 2011.

2. New Accounting Pronouncements

In December 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2011-10, “Property, Plant, and Equipment (Topic 360): Derecognition of in Substance Real Estate – a Scope Clarification.” This ASU requires that a reporting entity that ceases to have a controlling financial interest in a subsidiary that is in substance real estate as a result of default on the subsidiary’s nonrecourse debt would apply FASB Accounting Standards Codification (ASC) Subtopic 360-20, “Property, Plant, and Equipment – Real Estate Sales,” to determine whether to derecognize assets and liabilities of that subsidiary. ASU 2011-10 is effective prospectively for a deconsolidation event that takes place in fiscal years, and interim periods within those years, beginning on or after June 15, 2012. We do not believe the adoption of this update will have a material effect on our consolidated financial position or results of operations.

In December 2011, the FASB issued ASU 2011-11, “Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities.” This ASU adds certain additional disclosure requirements about financial instruments and derivative instruments that are subject to netting arrangements. ASU 2011-11 is effective for fiscal years, and interim periods within those years, beginning after January 1, 2013, with retrospective application required. We do not believe the adoption of this update will have a material impact on the disclosure requirements for our consolidated financial statements.

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CBRE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

3. REIM Acquisitions

On February 15, 2011, we announced that we had entered into definitive agreements to acquire the majority of the real estate investment management business of Netherlands-based ING Group N.V. (ING) for approximately $940 million in cash. The acquisitions included substantially all of ING’s Real Estate Investment Management (REIM) operations in Europe and Asia, as well as substantially all of Clarion Real Estate Securities (CRES), its U.S.-based global real estate listed securities business (collectively referred to as ING REIM). On February 15, 2011, we also announced that we expected to acquire approximately $55 million of CRES co-investments from ING and potentially additional interests in other funds managed by ING REIM Europe and ING REIM Asia. Upon completion of the acquisitions (collectively referred to as the REIM Acquisitions), ING REIM became part of our Global Investment Management segment (which conducts business through our indirect wholly-owned subsidiary, CBRE Global Investors, an independently operated business segment). We completed the REIM Acquisitions in order to significantly enhance our ability to meet the needs of institutional investors across global markets with a full spectrum of investment programs and strategies.

We secured borrowings of $800.0 million of term loans to finance the REIM Acquisitions (see Note 10). Of this amount, $400.0 million was drawn on June 30, 2011 to finance the CRES portion of the REIM Acquisitions, which closed on July 1, 2011. On August 31, 2011, we drew down the remaining $400.0 million, part of which was used to finance the ING REIM Asia portion of the REIM Acquisitions, which closed on October 3, 2011, and the remainder, along with cash on hand and borrowings under our revolving credit facility, was used to finance the ING REIM Europe portion of the REIM Acquisitions, which closed on October 31, 2011.

The following represents a summary of the purchase price for the REIM Acquisitions (dollars in thousands):

Our initial estimate of $940 million in total purchase price for the REIM Acquisitions has been reduced by approximately $47 million for certain fund and separate account management contracts that were not acquired and for certain balance sheet adjustments. As of September 30, 2012, there is a possibility of an additional closing of approximately $80 million and further co-investments of up to $20 million in the future related to our acquisition of ING REIM Europe.

In connection with our acquisition of CRES, we acquired CRES co-investments from ING in three funds (CRES Funds) for an aggregate purchase price of $58.6 million, which has been included above. We determined that the CRES Funds were not variable interest entities and accordingly determined the method of accounting based upon voting control. The limited partners/members of the CRES Funds lack substantive rights that would overcome our presumption of control. Accordingly, we began consolidating the CRES Funds as of the acquisition date of July 1, 2011. Included in the consolidation of the CRES Funds on July 1, 2011 was $182.9 million of non-controlling interests. In connection with the REIM Acquisitions, we also acquired three ING REIM Asia co-investments from ING for an aggregate amount of $13.9 million on October 3, 2011 and several ING REIM Europe co-investments, including one for $7.4 million on October 31, 2011, and nine additional co-investments for an aggregate amount of $35.2 million during the nine months ended September 30, 2012.

In January 2012, one of the CRES Funds (CBRE Clarion U.S., L.P.) was converted to a registered mutual fund, the CBRE Clarion Long/Short Fund (the Fund). As a result of this triggering event, we determined that the

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CBRE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

Fund became a variable interest entity and that we were not the primary beneficiary. Accordingly, in the first quarter of 2012, the Fund was deconsolidated from our consolidated financial statements and we recorded an investment in available for sale securities of $14.3 million. No gain or loss was recognized in our consolidated statement of operations as a result of this deconsolidation. We continue to act as the Fund’s adviser, make investment decisions for the Fund and review, supervise and administer the Fund’s investment program.

The purchase accounting for the CRES and ING REIM Asia portions of the REIM Acquisitions has been finalized. The preliminary purchase accounting adjustments related to the ING REIM Europe portion of the REIM Acquisitions has been recorded in the accompanying consolidated financial statements. The excess purchase price over the estimated fair value of net assets acquired has been recorded to goodwill. The purchase price allocation is expected to be completed as soon as practicable, but no later than one year from the acquisition date.

Unaudited pro forma results, assuming the REIM Acquisitions had occurred as of January 1, 2011 for purposes of the 2011 pro forma disclosures, are presented below. They include certain adjustments for the three and nine months ended September 30, 2011, including $3.3 million and $16.1 million, respectively, of increased amortization expense as a result of intangible assets acquired in the REIM Acquisitions, $2.5 million and $18.7 million, respectively, of additional interest expense as a result of debt incurred to finance the REIM Acquisitions, the removal of $14.9 million and $27.6 million, respectively, of direct costs incurred by us and ING related to the REIM Acquisitions, and the tax impact of the pro forma adjustments. These unaudited pro forma results have been prepared for comparative purposes only and do not purport to be indicative of what operating results would have been had the REIM Acquisitions occurred on January 1, 2011 and may not be indicative of future operating results (dollars in thousands, except share data):

4. Variable Interest Entities (VIEs)

A consolidated subsidiary (the Venture) in our Global Investment Management segment has sponsored investments by third-party investors in certain commercial properties through the formation of tenant-in-common limited liability companies and Delaware Statutory Trusts (collectively referred to as the Entities) that are owned by the third-party investors. The Venture also has formed and is a member of a limited liability company for each property that serves as master tenant (Master Tenant). Each Master Tenant leases the property from the Entities through a master lease agreement. Pursuant to the master lease agreements, the Master Tenant has the power to direct the day-to-day asset management activities that most significantly impact the economic performance of the Entities. As a result, the Entities were deemed to be VIEs since the third-party investors holding the equity investment at risk in the Entities do not direct the day-to-day activities that most significantly impact the economic performance of the properties held by the Entities. The Venture has made and may continue to make voluntary contributions to each of these properties to support their operations beyond the cash flow generated by

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CBRE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

the properties themselves. As of the most recent reconsideration date, such financial support has been significant enough that the Venture was deemed to be the primary beneficiary of each Entity.

An additional Entity was consolidated during the nine months ended September 30, 2012. The related real estate assets held for investment were $26.3 million, nonrecourse mortgage notes payable were $15.8 million and non-controlling interests were $10.6 million as of September 30, 2012.

During both the nine months ended September 30, 2012 and 2011, the Venture funded $0.2 million of financial support to the Entities.

Operating results relating to the Entities for the three and nine months ended September 30, 2012 and 2011 include the following (dollars in thousands):

Investments in real estate of $85.7 million and $61.3 million and nonrecourse mortgage notes payable of $77.4 million ($17.1 million of which is current) and $60.9 million ($1.2 million of which is current) are included in real estate held for investment and notes payable on real estate, respectively, in the accompanying consolidated balance sheets as of September 30, 2012 and December 31, 2011, respectively. In addition, non-controlling interests of $9.9 million and $1.6 million in the accompanying consolidated balance sheets as of September 30, 2012 and December 31, 2011, respectively, are attributable to the Entities.

We hold variable interests in certain VIEs in our Global Investment Management and Development Services segments which are not consolidated as it was determined that we are not the primary beneficiary. Our involvement with these entities is in the form of equity co-investments and fee arrangements.

As of September 30, 2012 and December 31, 2011, our maximum exposure to loss related to the VIEs which are not consolidated was as follows (dollars in thousands):

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CBRE GROUP, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

(Unaudited)

5. Fair Value Measurements

The “Fair Value Measurements and Disclosures” Topic of the FASB ASC (Topic 820) defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Topic 820 also establishes a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

There were no significant transfers in and out of Level 1 and Level 2 during the three and nine months ended September 30, 2012 and 2011.

The following tables present the fair value of assets and liabilities measured at fair value on a recurring basis as of September 30, 2012 and December 31, 2011 (dollars in thousands):