?- BASF SE
- Campine
- Yiyang Huachang Antimony Industry Co. Ltd
- Hunan ChenZhou Mining Group Co. Ltd
- Korea Zinc Co. Ltd
- Lambert Metals International
- Mandalay Resources Corp.
- Nihon Seiko
- Nyacol Nano Technologies Inc.
- Suzuhiro Chemical
- Tri-Star Resources PLC
- US Antimony
- Yunnan Muli Antimony Industry Co. Ltd