1. AB SKF
2. ABB Ltd.
3. ALMiG Kompressoren GmbH
4. Atlas Copco AB
5. Baker Hughes Company
6. Barber-Nichols Inc. by Graham Corporation
7. BOGE KOMPRESSOREN Otto Boge GmbH & Co. KG
8. BorgWarner Inc.
9. Celeroton AG
10. Chart Industries Inc.
11. Continental AG
12. Cryostar SAS
13. Ebara Corporation
14. ExxonMobil Corporation
15. General Electric Company
16. Howden Compressors Ltd.
17. Ingersoll Rand Inc.
18. Kawasaki Heavy Industries
Ltd.
19. Kobe Steel Ltd.
20. KTS Turbobillet X by Pacifica Power Sdn Bhd
21. MAN Energy Solutions SE
22. Mitsubishi Heavy Industries Ltd.
23. Siemens AG
24. Sollant Group
25. Sulzer Ltd.