The firm was founded in 1985 as a mergers and acquisitions boutique by Peter G. Peterson and Stephen A. Schwarzman, who had previously worked together at Lehman Brothers, Kuhn, Loeb Inc. Over the course of two decades, Blackstone has evolved into one of the largest private equity investment firms globally. In 2007, Blackstone completed a $4 billion initial public offering to become one of the first major private equity firms to list shares in its management company on a public exchange. Blackstone is headquartered at 345 Park Avenue in New York City, with more than a dozen additional offices in the United States, Europe and As
http://en.wikipedia.org/wiki/Blackstone_Group"The Blackstone Group, L.P. (NYSE: BX) is an alternative asset management and financial services company that specializes in private equity, real estate, and marketable alternative investment strategies, as well as mergers and acquisitions (M&A), restructuring, and fund-placement advisory services.Blackstone's private equity business has been one of the largest investors in leveraged buyout transactions over the last decade while its real estate business has been an active acquirer of commercial real estate. Since inception, Blackstone has completed investments in such notable companies as Hilton Worldwide, Equity Office Properties, Apria Healthcare, Republic Services, AlliedBarton, United Biscuits, Freescale Semiconductor and Travelport.