Companies US-Based:AccionAerojet RocketdyneAstraBusekCU AerospaceEarth ObservantExoTerraKuiperOrbionMiles SpaceMomentusMorpheusNewOrbitNorthrop GrummanPhase FourSpace Electric Thruster SystemsSpaceXViridian International:Ariane GroupBellatrix AerospaceEnpulsionExotrailFakelIHINew OrbitPale BlueRafaelThrustMeTsNIIMash