1. AP Sensing GmbH
2. Aragon Photonics Labs. S.L.U.
3. Baker Hughes Company
4. Bandweaver
5. Febus Optics
6. Fibre Completion Services
7. fibrisTerre Systems GmbH
8. Fotech Group Limited
9. Halliburton Energy Services Inc.
10. OFS Fitel
LLC. by The Furukawa Electric Co. Ltd.
11. OptaSense Ltd.
12. Optics11
13. Schlumberger Limited
14. Senstar Corporation
15. Silixa Ltd.
16. T. G. Baker Americas Inc. by R2P GMBH
17. Ziebel