1. Abu Dhabi National Oil Company
2. ANGI Energy Systems Inc.
3. Apache Corporation
4. BLU WAY S.R.L.
5. Clean Energy Fuels
6. Cryolor
7. Cryostar SAS
8. Enn Energy Holdings Limited
9. FTI International Group Inc
10. GNC Galileo S.A.
11. Greka Engineering and Technology Ltd.
12. John M. Ellsworth Company Inc
13. Linde plc
14. Parker Hannifin Corp.
15. Southern Company