UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL REPORT PURSUANT TO
SECTIONS 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

FORM 10-K/A

(Mark One)

[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2006.

OR

[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     .

Commission file number 001-32147

GREENHILL & CO., INC.

(Exact Name of Registrant as Specified in its Charter)


Delaware 51-0500737 (State or Other Jurisdiction
of Incorporation or Organization)
(I.R.S. Employer
Identification No.)
300 Park Avenue
New York, New York
    
10022
(Address of Principal Executive Offices) (ZIP Code)

Registrant’s telephone number, including area code: (212) 389-1500

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


Title of each class Name of each exchange on which registered Common Stock, par value $.01 per share New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes [X]    No [ ]

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.    Yes [ ]    No [X]

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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    [ ]

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of ‘‘accelerated filer and large accelerated filer’’ in Rule 12b-2 of the Act. (Check one):

Large accelerated filer [X]                Accelerated filer [ ]                Non-accelerated filer [ ]

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

The aggregate market value of the common stock held by non-affiliates of the Registrant, computed by reference to the closing price as of the last business day of the Registrant’s most recently completed second fiscal quarter, June 30, 2006, was approximately $1,177.3 million. The Registrant has no non-voting stock.

As of February 21, 2007, 28,468,032 shares of the Registrant’s common stock were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant’s definitive proxy statement delivered to stockholders in connection with the 2007 annual meeting of stockholders to be held on April 25, 2007 are incorporated by reference in response to Part III of this Report.





EXPLANATORY NOTE

This amendment on Form 10-K/A (the ‘‘Form 10-K/A’’) amends our annual report for the fiscal year ended December 31, 2006 originally filed with the Securities and Exchange Commission (‘‘SEC’’) on March 1, 2007 (the ‘‘Form 10-K’’). We are filing this amendment in response to a comment from the SEC to file the executed versions of audit opinions that appear under Item 15. as Financial Statement Schedules.

No attempt has been made in this Form 10-K/A to modify or update disclosures in the Form 10-K except as required to address the above issue. This Form 10-K/A does not reflect events occurring after the filing of the Form 10-K or modify or update any related disclosures. Information not affected by the amendment is unchanged and reflects the disclosure made at the time of the filing of the Form 10-K with the SEC. Accordingly, this Form 10-K/A should be read in conjunction with the Form 10-K and any documents incorporated by reference therein and our filings made with the SEC subsequent to the filing of the Form 10-K, including any amendments to those filings.

The only changes to the text from the Form 10-K are as follows:

Part IV

Item 15.    Exhibits and Financial Statement Schedules

  Signed report of Independent Registered Public Accounting Firm relating to the Combined Financial Statements of Greenhill Capital Partners, L.P., Greenhill Capital Partners (Cayman), L.P., Greenhill Capital Partners (Executives), L.P. and Greenhill Capital, L.P.   Signed report of Independent Registered Public Accounting Firm relating to the Combined Financial Statements of Greenhill Capital Partners II, L.P., Greenhill Capital Partners (Cayman) II, L.P., Greenhill Capital Partners (Executives) II, L.P. and Greenhill Capital Partners (Employees) II, L.P.   Updated consent of Ernst & Young LLP (Exhibit 23.1)   Updated certifications from our Co-Chief Executive Officers and our Chief Financial Officer (Exhibits 31.1, 31.2, 31.3, 32.1, 32.2 and 32.3)

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PART IV

Item 15.    Exhibits and Financial Statement Schedules

Supplemental Financial Information

2.    Financial Statement Schedules

Combined Financial Statements of Greenhill Capital Partners, L.P., Greenhill Capital Partners (Cayman), L.P., Greenhill Capital Partners (Executives), L.P. and Greenhill Capital, L.P.

Ernst & Young
5 Times Square
New York, New York 10036-6530

Report of Independent Registered Public Accounting Firm

To the Partners of Greenhill Capital Partners Private Equity Fund I:

We have audited the accompanying combined statements of assets, liabilities and partners’ capital of Greenhill Capital Partners Private Equity Fund I (comprised of Greenhill Capital Partners, L.P., Greenhill Capital Partners (Cayman), L.P., Greenhill Capital Partners (Executives), L.P. and Greenhill Capital, L.P.) (the ‘‘Partnerships’’), including the combined schedules of investments, as of December 31, 2006 and 2005, and the related combined statements of operations, changes in partners’ capital, and cash flows for each of the three years in the period ended December 31, 2006. These combined financial statements are the responsibility of the Partnerships’ General Partner. Our responsibility is to express an opinion on these combined financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the combined financial statements are free of material misstatement. We were not engaged to perform an audit of the Partnerships’ internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Partnerships’ internal control over financial reporting. Accordingly, we express no such opinion. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by the General Partner, as well as evaluating the overall combined financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the combined financial statements referred to above present fairly, in all material respects, the combined financial position of Greenhill Capital Partners Private Equity Fund I at December 31, 2006 and 2005, and the results of its operations, changes in its partners’ capital, and its cash flows for each of the three years in the period ended December 31, 2006, in conformity with U.S. generally accepted accounting principles.

Our audits were conducted for the purpose of forming an opinion on the basic combined financial statements taken as a whole. The accompanying supplemental schedules are presented for purposes of additional analysis and are not a required part of the basic combined financial statements. Such additional information has been subjected to the auditing procedures applied in the audits of the basic combined financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic combined financial statements taken as a whole.

/s/ Ernst & Young LLP

February 23, 2007

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Combined Financial Statements of Greenhill Capital Partners, L.P., Greenhill Capital Partners (Cayman) II, L.P., Greenhill Capital Partners (Executives) II, L.P. and Greenhill Capital Partners (Employees) II, L.P.

Ernst & Young
5 Times Square
New York, New York 10036-6530

Report of Independent Registered Public Accounting Firm

To the Partners of Greenhill Capital Partners Private Equity Fund II:

We have audited the accompanying combined statement of assets, liabilities and partners’ capital of Greenhill Capital Partners Private Equity Fund II (comprised of Greenhill Capital Partners II, L.P., Greenhill Capital Partners (Cayman) II, L.P., Greenhill Capital Partners (Executives) II, L.P. and Greenhill Capital Partners (Employees) II, L.P.) (the ‘‘Partnerships’’), including the combined schedule of investments, as of December 31, 2006 and 2005, and the related combined statements of operations, changes in partners’ capital, and cash flows for the year ended December 31, 2006 and the period from March 31, 2005 (commencement of operations) through December 31, 2005. These combined financial statements are the responsibility of the Partnerships’ General Partner. Our responsibility is to express an opinion on these combined financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the combined financial statements are free of material misstatement. We were not engaged to perform an audit of the Partnerships’ internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Partnerships’ internal control over financial reporting. Accordingly, we express no such opinion. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by the General Partner, as well as evaluating the overall combined financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the combined financial statements referred to above present fairly, in all material respects, the combined financial position of Greenhill Capital Partners Private Equity Fund II at December 31, 2006 and 2005, and the results of its operations, changes in its partners’ capital and its cash flows for the periods then ended, in conformity with U.S. generally accepted accounting principles.

Our audits were conducted for the purpose of forming an opinion on the basic combined financial statements taken as a whole. The accompanying supplemental schedules are presented for purposes of additional analysis and are not a required part of the basic combined financial statements. Such additional information has been subjected to the auditing procedures applied in the audits of the basic combined financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic combined financial statements taken as a whole.

/s/ Ernst & Young LLP

February 23, 2007

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3.    Exhibits

EXHIBIT INDEX


Exhibit Number Description 1 .1 Form of Underwriting Agreement. 2 .1 Reorganization Agreement and Plan of Merger of Greenhill & Co. Holdings, LLC (incorporated by reference to Exhibit 2.1 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 3 .1 Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Registrant’s registration statement on to Form S 1/A (No. 333-113526) filed on May 5, 2004). 3 .2 Amended and Restated By-Laws (incorporated by reference to Exhibit 3.2 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on May 5, 2004). 4 .1 Form of Common Stock Certificate (incorporated by reference to Exhibit 4.1 to the Registrant’s registration statement on to Form S-1/A (No. 333113526) filed on April 30, 2004). 10 .1 Form of Greenhill & Co, Inc. Transfer Rights Agreement (incorporated by reference to Exhibit 10.1 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .2 Form of Greenhill & Co., Inc. Employment, Non-Competition and Pledge Agreement (incorporated by reference to Exhibit 10.2 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 20, 2004). 10 .4 Form of U.K. Non-Competition and Pledge Agreement (incorporated by reference to Exhibit 10.4 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 20, 2004). 10 .5 Equity Incentive Plan (incorporated by reference to Exhibit 10.5 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 20, 2004). 10 .6 Form of Indemnification Agreement (incorporated by reference to Exhibit 10.6 to the Registrant’s registration statement on to Form S-1/A (No. 333113526) filed on April 30, 2004). 10 .7 Tax Indemnification Agreement (incorporated by reference to Exhibit 10.7 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 20, 2004). 10 .8 Loan Agreement (Line of Credit) dated as of December 31, 2003 between First Republic Bank and Greenhill & Co. Holdings, LLC (incorporated by reference to Exhibit 10.8 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 20, 2004). 10 .9 Security Agreement dated as of December 31, 2003 between Greenhill Fund Management Co., LLC and First Republic Bank (incorporated by reference to Exhibit 10.9 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 20, 2004).

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Exhibit Number Description 10 .10 Agreement for Lease dated February 18, 2000 between TST 300 Park, L.P. and Greenhill & Co., LLC (incorporated by reference to Exhibit 10.10 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .11 First Amendment of Lease dated June 15, 2000 between TST 300 Park, L.P. and Greenhill & Co., LLC (incorporated by reference to Exhibit 10.11 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .12 Agreement for Lease dated April 21, 2000 between TST 300 Park, L.P. and McCarter & English, LLP (incorporated by reference to Exhibit 10.12 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .13 Assignment and Assumption of Lease dated October 3, 2003 between McCarter & English, LLP and Greenhill & Co., LLC (incorporated by reference to Exhibit 10.13 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .14 Sublease Agreement dated January 1, 2004 between Greenhill Aviation Co., LLC and Riversville Aircraft Corporation (incorporated by reference to Exhibit 10.14 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .15 Agreement of Limited Partnership of GCP, L.P. dated as of June 29, 2000 (incorporated by reference to Exhibit 10.15 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .16 GCP, LLC Limited Liability Company Agreement dated as of June 27, 2000 (incorporated by reference to Exhibit 10.16 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .17 Amended and Restated Agreement of Limited Partnership of Greenhill Capital, L.P., dated as of June 30, 2000 (incorporated by reference to Exhibit 10.17 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .18 Amendment to the Amended and Restated Agreement of Limited Partnership of Greenhill Capital, L.P. dated as of May 31, 2004 (incorporated by reference to Exhibit 10.18 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .19 Amended and Restated Agreement of Limited Partnership of GCP Managing Partner, L.P. dated as of May 31, 2004 (incorporated by reference to Exhibit 10.19 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .20 Form of Assignment and Subscription Agreement dated as of January 1, 2004 (incorporated by reference to Exhibit 10.20 to the Registrant’s registration statement on to Form S-1/A (No. 333-113526) filed on April 30, 2004). 10 .21 Form of Greenhill & Co., Inc Equity Incentive Plan Restricted Stock Unit Award Notification – Five Year Ratable Vesting (incorporated by reference to Exhibit 10.21 to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2004). 10 .22 Form of Greenhill & Co., Inc Equity Incentive Plan Restricted Stock Unit Award Notification – Five Year Cliff Vesting (incorporated by reference to Exhibit 10.22 to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2004).

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Exhibit Number Description 10 .23 Form of Greenhill & Co., Inc. Equity Incentive Plan Restricted Stock Unit Award Notification – Five Year Ratable Vesting (incorporated by reference to Exhibit 10.23 to the Registrant’s registration statement on Form S-1/A (No. 333-112526) filed on April 30, 2004). 10 .24 Form of Greenhill & Co., Inc. Equity Incentive Plan Restricted Stock Unit Award Notification – Five Year Cliff Vesting (incorporated by reference to Exhibit 10.24 to the Registrant’s registration statement on Form S-1/A (No. 333-112526) filed on April 30, 2004). 10 .25 Amended and Restated Agreement of Limited Partnership of Greenhill Capital Partners (Employees) II, L.P. dated as of March 31, 2005 (incorporated by reference to Exhibit 99.2 of the Registrant’s report on Form 8-K filed on April 5, 2005). 10 .26 Amended and Restated Agreement of Limited Partnership of GCP Managing Partner II, L.P. dated as of March 31, 2005 (incorporated by reference to Exhibit 99.3 of the Registrant’s report on Form 8-K filed on April 5, 2005). 10 .27 Form of Agreement for Sublease by and between Wilmer, Cutler, Pickering, Hale & Dorr LLP and Greenhill & Co., Inc. (incorporated by reference to Exhibit 10.27 to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2005) 10 .28 Form of Greenhill & Co. Equity Incentive Plan Restricted Stock Award Notification – Five Year Ratable Vesting (incorporated by reference to Exhibit 10.28 to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2005) 10 .29 Form of Senior Advisor Employment and Non-Competition Agreement (incorporated by reference to Exhibit 10.29 to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2005) 10 .30 Form of Agreement for the Sale of the 7th Floor, Lansdowne House, Berkeley Square, London, among Pillar Property Group Limited, Greenhill & Co. International LLP, Greenhill & Co., Inc. and Union Property Holdings (London) Limited+ 10 .31 Loan Agreement dated as of January 31, 2006 by and between First Republic Bank and Greenhill & Co., Inc.+ 10 .32 Form of Agreement of Limited Partnership of GSAV (Associates), L.P.+ 10 .33 Form of Agreement of Limited Partnership of GSAV GP, L.P.+ 10 .34 Form of First modification agreement by and between First Republic Bank and Greenhill & Co., Inc.+ 21 .1 List of Subsidiaries of the Registrant+ 23 .1* Consent of Ernst & Young LLP 31 .1* Certification of Co-Chief Executive Officer Pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31 .2* Certification of Co-Chief Executive Officer Pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

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Exhibit Number Description 31 .3* Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32 .1* Certification of Co-Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32 .2* Certification of Co-Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32 .3* Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
* Filed herewith. + Filed with original filing of this Report.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

Dated:    January 22, 2008


GREENHILL & CO., INC. By: /s/ Scott L. Bok   Scott L. Bok
Co-Chief Executive Officer
By: /s/ Simon A. Borrows   Simon A. Borrows
Co-Chief Executive Officer