1. ABB Ltd.
2. Aclara Technologies LLC
3. AEM SA
4. Aichi Tokei Denki Co. Ltd.
5. Apator SA
6. Aqua Analytics
7. Arad Group
8. Azbil Kimmon Co. Ltd.
9. Badger Meter Inc.
10. Baylan Water Meters
11. Diehl Stiftung & Co. KG
12. Elster Group SE
13. EMH Metering GmbH & Co. KG
14. General Electric Company
15. Genus Power Infrastructures Limited
16. Hexing Electric Company Ltd.
17. Holley Technology Ltd.
18. Honeywell International Inc.
19. Iskraemeco Group
20. Itron Inc.
21. Jabil Inc.
22. Jiangsu Linyang Energy Co. Ltd.
23. Kamstrup A/S
24. Lakshmi Electrical Control Systems Ltd.
25. Landis+ GYR Group AG
26. Larsen & Toubro Limited
27. Microchip Technology Inc.
28. Mueller Systems LLC
29. Namjun Co. Ltd.
30. Networked Energy Services Corporation
31. Ningbo Sanxing Electric Co.Ltd.
32. Ningbo Water Meter (Group) Co. Ltd.
33. Osaki Electric Co. Ltd.
34. Peltek India
35. Pietro Fiorentini S.p.a.
36. Sagemcom Group
37. Schneider Electric SE
38. Secure Meters Ltd.
39. Shenzhen Kaifa Technology Co. Ltd.
40. Siemens AG
41. Silicon Laboratories
42. SmarterHomes Technologies Private Limited
43. Suntront Tech Co.Ltd.
44. Wasion International
45. WAVIoT Integrated Systems LLC
46. Wenling Younio Water Meter Co. Ltd.
47. Xemex N.V.
48. Xylem Inc.
49. Zenner International GmbH & Co. KG
50. ZPA Smart Energy a.s.