The current titleholder for the world's fastest private jet is the Gulfstream G700, developed by Gulfstream Aerospace.

Boom Supersonic’s XB-1 jet became the first independently developed aircraft to break the sound barrier in the Mojave Desert on Tuesday. The test flight marks a milestone in Boom’s effort to ...

MOJAVE, Calif. - XB-1 became the first American-made private supersonic jet to fly faster than the speed of sound as Boom Supersonic works toward building a fleet of supersonic jets for commercial ...

Boom Supersonic's XB-1 demonstrator jet became the first U.S.-made civilian supersonic jet to break the sound barrier. The independently funded XB-1 reached a speed of Mach 1.122, or about 750 mph ...