- BASF SE
- Campine
- Huachang Antimony Industry
- 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
- United States Antimony Corp.
- Village Main Reef Ltd
- Yunnan Muli Antimony Industry Co. Ltd