HEI.A

Heico Corporation

A maker of FAA-approved replacement parts for jet engines and aircraft, HEICO keeps planes flying with parts that rival the originals, and also supplies specialized electronics for defense and satellites. It started life in 1957 as Heinicke Instruments, a maker of medical lab equipment, before pivoting to aviation in 1974 and taking its current name in 1986. A fun twist: the company it grew from had no connection to flight at all.