Billionaire Bill Koch has listed his expansive Aspen estate for $125 million ... He also owns a 4,500-acre Colorado ranch featuring a 75-building replica of an Old West town.

A sprawling Colorado ... Koch has just hit the market. Nestled amid a scenic alpine valley tucked in between Castle Creek and the peaks of the Elk Mountains, about 10 miles outside of downtown ...

After selling a portion of his Elk Mountain Lodge estate in Aspen, Colo., billionaire industrialist Bill Koch is trying again to unload the rest of the property. This time he’s asking $125 ...

Now, it seems he is ready to claw some of it back with the sale of his sustainable Aspen spread, telling the Wall Street Journal that he and his wife, Bridget Rooney Koch, made the decision to let ...

PITKIN COUNTY, Colo. — Billionaire Bill Koch has listed his 52-acre Aspen retreat for sale for $125 million. The Elk Mountain Lodge property hit the market on Wednesday, and Koch was confirmed ...

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 tucked in ...