Yes, Bill Gates is widely reported to own a collection of four private jets, which he has famously described as a "guilty pleasure." His fleet currently includes two Gulfstream G650ERs and two Bombardier Challenger 350s, with a total estimated value of nearly $200 million. Gates has faced criticism for the carbon footprint of these aircraft, given his prominent role as a climate change activist and author of How to Avoid a Climate Disaster. In his defense, Gates has stated that he "offsets" his personal aviation emissions by purchasing large amounts of Sustainable Aviation Fuel (SAF) and funding carbon-capture technology. For 2026 observers, the fleet remains a symbol of the "imperfect messenger" dilemma, where the benefits of global travel for humanitarian and environmental work are weighed against the high environmental cost of private luxury flight.