The headline promise of a $99 million ask for Bill Koch's Aspen mansion is, based on available reporting, unverified. What is firmly documented is that the billionaire energy heir brought his Elk ...

You’ll have to boast a particularly robust bank account to nab billionaire Bill Koch’s newly listed wintry Colorado retreat. The oil heir’s 52-acre estate, dubbed Elk Mountain Lodge, has hit the ...

Billionaire Bill Koch has lowered the asking price for his 53-acre Aspen, Colorado, property to $99 million — $26 million less than the $125 million price tag set when he listed in January 2024. Koch ...