1. ALB Materials Inc.
2. American Elements
3. Atecom Technology Co. Ltd.
4. AXT Inc.
5. Azelis Group
6. CMC Microsystems
7. CrysTec GmbH
8. DOWA Holdings Co. Ltd.
9. Freiberger Compound Materials GmbH
10. Intelligent Epitaxy Technology Inc. (IntelliEPI)
11. IQE PLC
12. Logitech Limited
13. Nanografi Nano Technology by Ahlatci Holding
14. nanoPHAB B.V.
15. PlutoSemi Co. Ltd.
16. Precision Micro-Optics Inc.
17. Sanan Optoelectronics
18. Sumitomo Electric Group
19. Vital Materials Co. Limited
20. Wafer Technology Ltd.
21. Wafer World Inc.
22. Western Minmetals (SC) Corporation
23. Xiamen Powerway Advanced Material Co. Limited