What kind of groups are Blackstone Group and KKR Group?

Blackstone Group was founded by Peter Peterson, a former Lehman Brothers executive, and Su Shimin, a veteran, with the number 1985. The company name "Blackstone" originated from Peterson, Germany, and Schwarczman's surname was embedded with the meaning of "black" in German and "stone" in Greek. Headquartered in new york, USA, it has offices in Atlanta, Boston, London, Hamburg, Paris, Mumbai and Hongkong. Blackstone Group started with four employees and $400,000. The first bucket of gold came from Sony. KKR attracts people's attention because of its leveraged buyout (LBO).

The acquisition of duracell is the most successful case of KKR using this M&A method.