1. ABB Ltd.
2. Crompton Greaves Ltd.
3. Hitachi Ltd.
4. Mitsubishi Electric Corporation
5. General Electric Corporation
6. Siemens AG
7. Schneider Electric SE
8. TBEA Co. Ltd.
9. Eaton Corporation PLC
10. Toshiba Corporation
11. Bharat Heavy Electricals Limited
12. Hyundai Heavy Industries Co. Ltd.
13. Hyosung Corporation
14. Baoding Tianwei Baobian Electric Co. Ltd.
15. Wilson Transformer Company Pty Ltd
16. Hammond Power Solutions Inc.
17. JiangSu HuaPeng Transformer Co. Ltd.
18. Zaporozhtransformator PJSC
19. China XD Electric Co. Ltd.
20. Kirloskar Electric Company Limited