1. ABB Ltd.
2. Camsco Electric Co. Ltd.
3. Eaton Corporation
4. General Electric Company
5. Honeywell International Inc.
6. Itron Inc.
7. Larsen & Toubro Limited
8. Legrand SA
9. Mitsubishi Electric Corporation
10. Rockwell Automation Inc.
11. S&C Electric Company Inc.
12. Schneider Electric S.E.
13. Schurter AG
14. Siemens Corporation
15. Xiamen Hongfa Electroacoustic Co. Ltd.
16. Yueqing Liyond Electric Co. Ltd.