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 ...

Former Sprint CEO Marcelo Claure has sold a large property in Aspen, Colo., to his neighbor for $37.3 million, five years after buying it for $11 million. Located just outside downtown Aspen ...

Pitching its tent next to billionaires is a start. By Ray Mark Rinaldi Reporting from Aspen, Colo. A down art market? Depressed dealers? Fatigued buyers? None of that matters in Aspen, Colo.