Bill Koch, a billionaire oil and investments mogul, might be worth $2 billion; however, even by his lofty standards, scoring an astounding $100 million profit takes some beating. That’s nearly the ...

Billionaire energy mogul Bill Koch is looking to cash in on Aspen’s red-hot luxury real estate market by listing his sprawling 52-acre mountain estate for a staggering $125 million, the Wall Street ...