普通成员
普通成员包括开采锰矿和/或生产锰铁合金的公司，以及生产锰基化合物的公司。
联盟成员
成员包括贸易公司、锰业务发展的投资公司、锰冶金产品或锰化合物的最终用户、生产电解金属锰和电解二氧化锰的公司、行业服务供应商、大学和研究机构。
化工产品部门
生产碳酸锰、硫酸锰、二氧化锰、硝酸锰、亚硝酸锰、硫化锰、丁二烯三氧化物、丁二烯四氧化物、氢氧化锰、高锰酸钾、锰氧化物及其他锰氧化物等化工用产品的企业，以及特种产品加工者。
电解产品会员单位
电解产品部的会员单位都是通过电解方式生产电解金属锰或电解二氧化锰的生产商。
国际锰协成员
Member |
Type |
Country |
|---|---|---|
| Afrimat Shared Services (Pty) Ltd. | Ordinary members | South Africa |
| Afton Chemical Corporation | Affiliate members | USA |
| ArcelorMittal | Affiliate members | Luxembourg |
| Asia Minerals Ltd. | Ordinary members | China (Hong Kong) |
| Autlan | Ordinary members | Mexico |
| BaoSteel Resources International Company Limited | Affiliate members | China |
| Bosai Minerals Group Co., Ltd. | Ordinary members | China |
| Bryah Resources Limited | Ordinary members | Australia |
| Cahya Mata Sarawak Berhad | Affiliate members | Malaysia |
| Carus Corporation | Chemical products division | USA |
| Centre de Recherches Metallurgiques (CRM) | Affiliate members | Belgium |
| Citi Research | Affiliate members | Austrlia |
| Consolidated Minerals Ltd. | Ordinary members | United Kingdom |
| Element 25 Limited | Ordinary members | Australia |
| Eramet Comilog Manganese | Ordinary members | France |
| Euro Manganese Inc. | Chemical products division | Canada |
| Ferroglobe | Ordinary members | United Kingdom |
| Firebird Metals Limited | Ordinary members | Australia |
| Galaxy Resources Limited | Affiliated members | Australia |
| Galmet SpA | Affiliate members | Italy |
| Gerdau Acos Longos S/A | Affiliated members | Brazil |
| Glencore International AG | Ordinary members | Switzerland |
| Guangxi Guikang New Materials Co., Ltd. | Ordinary members | China |
| Guangxi Hourong Trading Company | Affiliated members | China |
| Guangxi Steel Raw Materials Trading Co., Ltd. | Affiliate members | China |
| Hanwa Co., Ltd. | Affiliate members | Japan |
| Harcan Engineering Co., Ltd. | Affiliate members | China |
| Hira Electro Smelters Ltd | Ordinary members | India |
| Inner Mongolia Chayouqianqi Mengfa Ferroalloy Co. Ltd. | Ordinary members | China |
| Inner Mongolia Chayouqianqi Tengfei Ferroalloy Co., Ltd | Ordinary members | China |
| Inner Mongolia Xinchuang Metallurgical Group Co., Ltd. | Ordinary members | China |
| JFE Shoji Trade Corporation | Affiliate members | Japan |
| Jitie (Tianjin) International Trade Co., Ltd. | Ordinary members | China |
| Kalagadi Manganese | Ordinary members | South Africa |
| Kalon Resources Pte Ltd. | Affiliate members | Singapore |
| Keras Resouces PLC | Ordinary members | United Kingdom |
| Kimpe SAS | Chemical products division | France |
| Kudumane Manganese Resources (Pty) Ltd. | Ordinary members | South Africa |
| L & M Rohstoffhandels GmbH | Affiliate members | Germany |
| Linze Hongxin Mineral Industry Company Company | Ordinary members | China |
| Lizetta Holding | Ordinary members | Ivory Coast |
| Manganese Metal Company (MMC) | EPD Members | South Africa |
| Maringa Ferro-Liga S.A. | Ordinary members | Brazil |
| Marubeni Tetsugen Co. Ltd. | Affiliate members | Japan |
| Mineração Buritirama S.A. | Ordinary members | Brazil |
| Minerais US LLC | Affiliate members | USA |
| Minmet S.A.M. | Affiliate members | Monaco |
| Minmetals Development Co. Ltd | Ordinary members | China |
| Mitsui & Co. UK Plc | Affiliate members | Japan |
| Mizushima Ferro-alloy Co. Ltd. | Ordinary members | Japan |
| Mn Energy Ltd | Chemical products division | Australia |
| MOIL Limited | Ordinary members | India |
| NG Global Energy Solutions (Pty) Ltd. | Ordinary members | Australia |
| Ningxia Jiyuan Metallurgical Group Co. Ltd. | Ordinary members | China |
| Ningxia Shengyan Industry Group Energy Recycling Economy Co., Ltd. | Ordinary members | China |
| Nippon Denko Co. Ltd. | Ordinary members | Japan |
| OFZ a.s. | Ordinary members | Slovakia |
| Oldendorff Carriers | Affiliate members | Singapore |
| OM Holdings Ltd. | Ordinary members | Singapore |
| Omni Industries B.V. – Satka Group | Affiliated members | The Netherlands |
| Ore & Metal Co. Ltd. | Ordinary members | South Africa |
| Primeore Ltd. | Affiliate members | Cyprus |
| Prince | Affiliate members | USA |
| Ronly Holdings Ltd. | Affiliate members | United Kingdom |
| Roskill | Affiliated members | United Kingdom |
| S.H. Bell Company | Affiliated members | USA |
| Shaanxi Sinian Metal & Mining Co., Ltd. | Affiliate members | China |
| Shanghai Fengri International Trading Co., Ltd. | Affiliated members | China |
| Shanghai Qunxian International Trade Co., Ltd. | Affiliated members | China |
| Shanxi Dongfang Resources Development Co., Ltd. | Ordinary members | China |
| Shaoxing Haili Goods and Materials Co. Ltd | Ordinary members | China |
| Sibelco Europe MineralsPlus | Affiliate members | Netherlands |
| Simpac Metal Co., Ltd. | Ordinary members | South Korea |
| Sinosteel Resources Co., Ltd. | Affiliated members | China |
| Sojitz Corporation | Affiliated members | Japan |
| South Manganese Group Limited | EPD Members | China |
| South32 | Ordinary members | Australia |
| Sumitomo Corporation | Affiliate members | Japan |
| Tata Steel Ltd. | Ordinary members | India |
| The David J. Joseph Company | Affiliated members | USA |
| Tianjin Hoperay Mineral Co., Ltd. | Affiliate members | China |
| Tianjin Zhongjun International Trading Co., Ltd. | Ordinary members | China |
| Tosoh Corporation | EPD Members | Japan |
| Transalloys PTY (Ltd) | Ordinary members | South Africa |
| Traxys North America, LLC | Affiliate members | USA |
| Tshipi é Ntle Manganese Mining (Pty) Limited | Ordinary members | South Africa |
| Ukrainian Ferroalloys (UkrFA) | Ordinary members | Ukraine |
| United Manganese of Kalahari | Ordinary members | South Africa |
| Urangesellschaft MBH | Affiliated members | Germany |
| Vale | Ordinary members | Brazil |
| Vedika Metals Pvt Ltd | Affiliated members | India |
| Vietnam Haiduong New Resources Metallurgy Shareholdings Company | Ordinary members | Vietnam |
| Volkswagen AG | Affiliated members | Germany |
| World Metals & Alloys (FZC) | Affiliate members | UAE |
| Xallas Electricidad y Aleaciones, S.A.U. | Ordinary members | Spain |
| Zhejiang Fuchun Corporation | Affiliate members | China |
