by Leslie N. Masonson, MBA Blackstone Inc., a NYSE-listed firm (BX), founded in 1985 by Stephen A. Schwarzman and Peter G. Peterson, went public in 2007. It is headquartered at 345 Park Avenue in New York City, with a workforce of nearly 4,700 and revenues of $7.3 billion, and a market-cap of $132 billion. [...]