1. AltaRock Energy Inc.
2. Ansaldo Energia S.p.A.
3. BESTEC GmbH
4. Calpine Corporation
5. Chevron Corporation
6. Eavor Technologies Inc.
7. Enel Green Power S.p.A.
8. Fervo Energy
9. First Gen Corporation by First Philippine Holdings Corporation
10. Fuji Electric Co. Ltd.
11. GreenFire Energy Inc.
12. Guadeloupe Energie
13. Kenya Electricity Generating Company PLC
14. Mitsubishi Heavy Industries
Ltd.
15. Ormat Technologies Inc.
16. Quaise Energy
17. Sage Geosystems
18. Schlumberger Limited
19. Seequent by Bentley Subsurface Company
20. Toshiba Energy Systems & Solutions Corporation
21. Welltec International ApS