1. W?rtsil? Corporation
2. MAN Energy Solutions SE
3. Caterpillar Inc.
4. Rolls-Royce Holdings plc
5. Cummins Inc.
6. Yanmar Co. Ltd.
7. Kawasaki Heavy Industries
Ltd.
8. Daihatsu Diesel Mfg. Co. Ltd.
9. Hyundai Heavy Industries Co. Ltd.
10. Volvo Penta