1. Ashok Leyland Ltd.
2. Atlas Copco AB
3. Caterpillar Inc.
4. Cummins Inc.
5. Doosan Corp.
6. Generac Holdings Inc.
7. Greaves Cotton Limited
8. Honda India Power Products Ltd.
9. Kirloskar Oil Engines Ltd.
10. Kohler Co.
11. Mahindra & Mahindra Ltd.
12. Mitsubishi Heavy Industries Ltd
13. Perkins Engines Company Ltd.
14. Rolls-Royce Holding PLC
15. Yamaha Motor Co. Ltd.