Billionaire Bill Koch has sold his sprawling Aspen, Colorado, compound for $33.5 million at auction, a significant drop from his initial $125 million asking price. Koch, founder of Oxbow Carbon, had owned the property since 2007, initially purchasing it for $26.5 million.

The sale of Bill Koch's Aspen compound highlights the challenges in the high-end real estate market, where ambitious pricing can lead to significant discounts when properties eventually sell at auction.
Billionaire Bill Koch has sold his extensive compound in Aspen, Colorado, for $33.5 million at auction, a figure significantly lower than his initial asking price of $125 million. The founder of Oxbow Carbon purchased the property in 2007 for $26.5 million and later expanded it by acquiring an additional 31 acres. The compound first hit the market in 2015 with a $100 million price tag, which was subsequently reduced to $80 million in 2016. In 2020, Koch sold the extra 31 acres for $14.5 million, retaining the main lodge and the remaining 52 acres. The property was relisted in early 2025 for $125 million before Koch opted for an auction, a strategy sometimes used for high-profile properties. The winning bid of $33.5 million represents a 73% decrease from its highest listed price. Had Koch achieved his $125 million goal, it would have surpassed the $120 million sale of Alex Karp's ranch in nearby Snowmass, Colorado, setting a new record for the state. Koch, with a net worth of $2 billion according to Forbes, had previously sold his stake in Koch Industries to his brothers for $470 million in 1983. The sold main lodge encompasses 16,600 square feet and is complemented by seven cabins, including a home gym, as well as hot tubs and hiking trails.