NetJets Inc., a subsidiary of Berkshire Hathaway, is an American company that sells part ownership or shares (called fractional ownership) of private business jets. NetJets was founded in 1964 as Executive Jet Aviation. It was the first private business jet charter and aircraft management company.
NetJets is also the largest private jet operator in the world.
NetJets sells fractions of specific aircraft, chosen from several available types at the time of purchase. Owners then have guaranteed access (50–400 hours annually, depending on share size) to that aircraft with as little as four hours' notice. If the owner's aircraft is unavailable for some reason, another aircraft of the same type, or a larger aircraft, will be provided.
Some of private jets includes: Bombardier Challenger 350, Bombardier Challenger 650, Bombardier Global 5000, Bombardier Global 6000, Cessna 550 Citation Bravo.
According to en.wikipedia