1. Ayta? Gypsum A.?.
2. Beijing New Building Material (Group) Co. Ltd.
3. BGC (Australia) PTY Ltd
4. China National Building Material Company Limited (CNBM)
5. CHIYODA UTE CO.LTD.
6. Delcor Inc.
7. Everest Industries Limited
8. Georgia-Pacific LLC
9. Gypsemna Company LLC
10. IB Roof Systems Inc.
11. Jason Plasterboard (Jiaxing) Co. Ltd
12. KCC CORPORATION
13. Knauf Gips KG
14. MMM ERBA Makina A.?.
15. Nichiha USA Inc.