In the commercial aviation sector, three primary companies dominate the jet engine market: Rolls-Royce, Pratt & Whitney, and General Electric. Rolls-Royce, based in the UK, has a long history of supplying engines to both European and American aircraft. The other two major players, Pratt & Whitney and General Electric, are headquartered in the United States.
These manufacturers produce engines for nearly all civilian planes, though not all are branded as such. For instance, CFM International's CFM56 and CFM LEAP engines are products of a joint venture between General Electric and Safran. Similarly, IAE produced the V2500 through a partnership that included Pratt & Whitney and Rolls-Royce.
Pratt & Whitney was founded in 1925 and initially dominated the piston engine market before transitioning to jet engines in the 1950s. The company became part of United Technologies after being sold by Boeing due to government intervention. Over time, it developed successful turbofan engines like the JT9D for the Boeing 747 and more recently the PW1000G geared turbofan.