Billionaire Bill Koch has listed his expansive Aspen estate for $125 million, a significant increase from the $26.5 million he paid for it in 2007. Shawn O'Connor Billionaire energy mogul Bill ...

A sprawling Colorado estate long owned by billionaire businessman, sailor, and avid art and wine collector William “Bill” Koch has just hit the market. Nestled amid a scenic alpine valley ...

billionaire industrialist Bill Koch is trying again to unload the rest of the property. This time he’s asking $125 million, more than double the 2016 price.

Billionaire Bill Koch has put his 16,600-square-foot log mansion on 52 acres in Aspen up for sale for $125 million. If it fetches that price, it would shatter the Colorado home price record.