High Quality Content by WIKIPEDIA articles! Charles de Ganahl Koch (pron.: /?ko?k/; born November 1, 1935) is an American businessman and philanthropist. He is co-owner, chairman of the board, and chief executive officer of Koch Industries Inc., the second-largest privately held company by revenue in the United States according to a 2010 Forbes survey. As of October 2012, Charles was ranked the 6th richest person in the world with an est. net worth of of $37.8 billion, according to the Bloomberg Billionaires Index. He was ranked 18th on Forbes World's Billionaires list of 2011 (and 4th on the Forbes 400), with an estimated net worth of $25 billion, deriving from his 42% stake in Koch Industries. His brother David H. Koch, also owns 42% of Koch Industries, and serves as Executive Vice President. The brothers inherited the business from their father, Fred C. Koch, and have since expanded the business to 2,600 times its inherited size. Originally involved exclusively in oil refining and...