US EP Companies

1. Aerojet Rocketdyne, L3 Harris
2. Agile Space Industries
3. APEX (Phase Four)
4. Astra
5. Busek
6. CU Aerospace
7. Cislunar Industries
8. Earth Observant
9. Voyager (ExoTerra)
10. Kuiper
11. Orbion
12. Miles Space
13. Momentus
14. Morpheus
15. Northrop Grumman
16. Revolution Space (Accion)
17. Space Electric Thruster Systems
18. SpaceX
19. Stellant (L3 ETI)
20. Vaxon
21. Viridian Space

International EP Companies

1. Ariane Group – Germany
2. Bellatrix Aerospace – India
3. Enpulsion – Austria
4. Exotrail – France
5. Fakel - Russia
6. IHI – Japan
7. Mars Space – United Kingdom
8. New Orbit
9. Rafael – Israel
10. Safran Group – France
11. ThrustMe - France
12. TsNIIMash - Russia