Bill Koch, Aspen

Forbes said the 84-year-old lives in Florida with a real-time net worth of $2 billion — and after this house sale, he’ll be a ...
For the third straight quarter, St. Louis, led as the top luxury housing market in the U.S., according to the latest Wall ...
William Koch, the billionaire brother of Tea Party darlings David and Charles, has listed his expansive Aspen ski mansion for $89.9 million, according to The Aspen Daily News (via Curbed).