Organization

6 Months Ended

Jun. 30, 2012

Organization

Note 1 — Organization

Greenhill & Co., Inc., a Delaware corporation, together with its subsidiaries (collectively, the “Company”), is a leading independent investment bank focused on providing financial advice on significant mergers, acquisitions, restructurings, financings and capital raising to corporations, partnerships, institutions and governments. The Company acts for clients located throughout the world from its offices located in the United States, United Kingdom, Germany, Canada, Japan, Australia and Sweden.

The Company’s activities as an investment banking firm constitute a single business segment, with two principal sources of revenue:

• Advisory, which includes engagements relating to mergers and acquisitions, financing advisory and restructuring, and private equity and real estate capital advisory services; and

• Investments, which includes the Company’s principal investments in certain merchant banking funds, Iridium Communications Inc. (“Iridium”) and other investments.

The Company’s wholly-owned subsidiaries that provide advisory services include Greenhill & Co., LLC (“G&Co”), Greenhill & Co. International LLP (“GCI”), Greenhill & Co. Europe LLP (“GCEI”), Greenhill & Co. Japan Ltd. (“GCJ”), Greenhill & Co. Canada Ltd. (“GCC”), and Greenhill Caliburn Pty Limited (“Greenhill Caliburn”).

G&Co is engaged in investment banking activities principally in the U.S. G&Co is registered as a broker-dealer with the Securities and Exchange Commission (“SEC”) and the Financial Industry Regulatory Authority (“FINRA”), and is licensed in all 50 states and the District of Columbia. G&Co is also registered as a municipal advisor with the SEC and the Municipal Securities Rulemaking Board.

GCI and GCEI are engaged in investment banking activities in the U.K. and Europe, respectively, and are subject to regulation by the U.K. Financial Services Authority (“FSA”). GCJ and GCC are engaged in investment banking activities in Japan and Canada, respectively. GCJ is registered with the Kanto Local Finance Bureau in Japan and is subject to regulation by the Financial Services Agency in Japan. Greenhill Caliburn engages in investment banking activities in Australia and New Zealand and is licensed and subject to regulation by the Australian Securities and Investment Commission (“ASIC”).