1. Hyundai Heavy Industries
2. Wartsila Corporation
3. Rolls Royce Power Systems AG
4. Vpower Group
5. Caterpillar Inc.
6. Powerica Limited
7. Aggreko PLC
8. Ningbo C.S.I Power & Machinery Group Co. Ltd.
9. Tellhow Sci-Tech Co Ltd
10. Daihatsu Diesel Mfg. Co. Ltd.
11. General Electric (GE)