1. Airbus SE
2. Bell Textron Inc.
3. Collins Aerospace
4. Enstrom Helicopter Corporation
5. HELICOPTERES GUIMBAL
6. Hiller Aircraft Corporation
7. Hindustan Aeronautics Limited
8. Leonardo S.p.A.
9. Lockheed Martin Corporation
10. MD HELICOPTERS LLC
11. Piasecki Aircraft Corporation
12. Robinson Helicopter Company
13. ROTOR X AIRCRAFT MANUFACTURING CO.
14. Russian Helicopters JSC
15. Schweizer