Billionaire energy mogul Bill Koch is looking to cash in on ... With Aspen real estate in high demand, Koch and his wife, Bridget Rooney Koch, decided it was time to sell.

billionaire industrialist Bill Koch is trying again to unload ... Now empty-nesters, he and his wife, Bridget Rooney Koch, “looked at the strong housing market and figured it was time to let ...

Bill Koch, a billionaire oil and investments mogul ... square-foot main lodge and seven cabins. Koch and his wife, Bridget Rooney Koch, also used the home themselves in the summer and winter ...

Billionaire Bill Koch has listed his 52-acre Aspen retreat ... The property, at 125 Rooney Circle, boasts a rustic main residence with 16,631 square feet with seven bedrooms and eight bathrooms.