Elwood Jesse "Bill" Simpson was an American racing driver, best known as a pioneer in the racing safety business with his company Simpson Performance Products. Later during his business career he branched into developing equipment for football safety.

Simpson Performance Products is an American motorsports parts supplier that manufactures safety products such as gloves, helmets, harness systems, driver's suits, head restraints, and shoes. It is marketed to racers ranging from participants at local track days to international Formula One and NASCAR teams. It was started by Bill Simpson as Simpson Drag Chutes.