By Xeba73 (2014-08-26)
Koch is the billionaire co-owner and CEO of Koch Industries (oil, chemicals, energy, minerals, fertilizers, finance, ranching etc.), the second largest privately held company in the US.
As of August 2014, Forbes estimates his net worth at ~ $42 billion, making him the sixth-richest person in the world.
He purchased this 6,000 sqft Aspen home in 1992 for $2.65 million.