1. Abtech Inc.
2. ACS Group
3. Algeco
4. Alta-Fab Structures Ltd.
5. Art’s Way Manufacturing
6. Berkeley Group
7. Bouygues Construction SA
8. Hickory Group
9. Kiewit Corporation
10. KLEUSBERG GmbH & Co. KG
11. Larsen & Toubro Ltd.
12. Lendlease corporation
13. Skanska AB
14. Sumitomo Riko Company Limited
15. Taisei Corporation