1. Aggreko
2. AKSA Power Generation by Kazanc? Holding
3. Baosteel Group Corporation
4. Caterpillar Inc.
5. CNPC Jichai Power Company Limited
6. Cooper Corporation
7. Cummins Inc.
8. Doosan Corporation
9. Generac Power Systems Inc.
10. General Electric Company
11. Himoinsa SL by Yanmar Holdings Co. Ltd.
12. Kohler Co.
13. mtu Solutions by Rolls-Royce Power Systems AG
14. Multiquip Inc. by Itochu Corporation
15. Parker Hannifin Corporation
16. Shandong Lvhuan Power Equipment Co. Ltd.
17. Sumitomo Seika Chemicals Company
Limited
18. W?rtsil? Corporation