1. Boral Limited
2. Breedon Group PLC
3. Carmeuse Americas
4. CEMEX
S.A.B. de C.V.
5. Cold River Materials
6. Colorado Materials
Ltd.
7. CRH PLC
8. Dolese Bros. Co.
9. Eagle Materials Inc.
10. Heidelberg Materials
11. Holcim Group
12. Luck Stone Corporation
13. Martin Marietta Materials Inc.
14. New Enterprise Stone & Lime Co. Inc.
15. Phenix Enterprise
16. R.W. Sidley Inc.
17. Rogers Group Inc.
18. Shree Balaji Steel Industry
19. Sika AG
20. Summit Materials
21. Verstegen Grijpers B.V
22. Vicat Group
23. Vulcan Materials Company