1. Caterpillar Inc.
2. Charles Ross & Son Company
3. CMI Roadbuilding Limited
4. CS Unitec Inc.
5. DUSTmasters Enviro System
6. Dynamic Air Inc.
7. Frumecar S.L.
8. Gruber Systems
9. Jamieson Equipment Co.
10. Liebherr-International Deutschland GmbH
11. Sany Group
12. Shantui Construction Machinery Co. Ltd
13. Simem S.p.A
14. Sinotruk Hong Kong Ltd.
15. Zoomlion Heavy Industry Science & Technology Co. Ltd