1. ABB Ltd.
2. Aditya Birla Insulators
3. Almatis B.V.
4. Bharat Heavy Electricals Limited
5. Elsewedy Electric
6. Incap Limited
7. LAPP Insulators GmbH
8. MacLean-Fogg Company
9. Modern Insulators Ltd.
10. NGK Insulators
Ltd.
11. Olectra Greentech Limited
12. SEVES Group S.? r.l.
13. Siemens AG
14. TE Connectivity Ltd.
15. Toshiba Corporation