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 |
|---|---|---|
| ArcelorMittal | Affiliated members | Luxembourg |
| Maringa Ferro-Liga S.A. | Ordinary members | Brazil |
| Citi Research | Affiliated members | Australia |
| Ukrainian Ferroalloys (UkrFA) | Ordinary members | Ukraine |
| United Manganese of Kalahari | Ordinary members | South Africa |
| Afton Chemical Corporation | Affiliated members | USA |
| Asia Minerals Ltd. | Ordinary members | China (Hong Kong) |
| Ore & Metal Co., Ltd. | Ordinary members | South Africa |
| Autlan | Ordinary members | Mexican |
| BaoSteel Resources International Company Limited | Affiliated members | China |
| Bryah Resources Limited | Ordinary members | Australia |
| Carus Corporation | Chemical products division | USA |
| CITIC Dameng Mining Industries Ltd. | Affiliated members | China |
| Cahya Mata Sarawak Berhad | Affiliated members | Malaysia |
| Zhejiang Fuchun Corporation | Affiliated members | China |
| Consolidated Minerals Ltd. | Ordinary members | United Minerals |
| Centre de Recherches Metallurgiques (CRM) | Affiliated members | Belgium |
| Element 25 Limited | Ordinary members | Australia |
| Eramet Comilog Manganese | Ordinary members | France |
| Ferroglobe | Ordinary members | Spain |
| Glencore International AG | Ordinary members | Switzerland |
| Guangxi Guikang New Materials Co., Ltd. | Ordinary members | China |
| SPIC Guizhou Jinyuan Suiyang Industrial Co., Ltd. | Ordinary members | China |
| Hanwa Co., Ltd. | Affiliated members | Japan |
| Harcan Engineering Co., Ltd. | Affiliated members | China |
| Hascor Group | Ordinary members | USA |
| Tianjin Hoperay Mineral Co., Ltd. | Affiliated members | China |
| Kalagadi Manganese | Ordinary members | South Africa |
| Keras Resources PLC | Ordinary members | United Kingdom |
| Kimpe SAS | Chemical products division | France |
| Kudumane Manganese Resources (Pty) Ltd. | Ordinary members | South Africa |
| L & M Rohstoffhandels GmbH | Affiliated members | Germany |
| Galmet SpA | Affiliated members | Italy |
| Guangxi Steel Raw Materials Trading Co. Ltd. | Affiliated members | China |
| Minmet S.A.M. | Affiliated members | Monaco |
| Dameng Resources Limited | Affiliated members | China |
| Inner Mongolia Chayouqianqi Mengfa Ferroalloy Co., Ltd. | Ordinary members | China |
| LInze Hongxin Mineral Industry Company | Ordinary members | China |
| Marubeni Tetsugen Co., Ltd. | Affiliated members | Japan |
| Mineracao Buritirima S.A. | Affiliated members | Brazil |
| Minerais US LLC | Affiliated members | USA |
| Minmetals Development Co., Ltd. | Ordinary members | China |
| Mitsui & Co. UK Plc | Affiliated members | Japan |
| Mizushima Ferro-alloy Co., Ltd. | Ordinary members | Japan |
| Manganese Metal Company (MMC) | EPD Members | South Africa |
| MOIL Limited | Ordinary members | India |
| Nippon Denko Co., Ltd. | Ordinary members | Japan |
| Ningxia Shengyan Industry Group Energy Recycling Economy Co., Ltd. | Ordinary members | China |
| OFZ, a.s. | Ordinary members | Slovakia |
| OM Holdings Ltd. | Ordinary members | Singapore |
| Pilbara Metals Group Ltd. | Chemical products division | Australia |
| Primore ltd. | Affiliated members | Cyprus |
| Prince | Affiliated members | USA |
| Shanghai Qunxian International Trade Co., Ltd. | Affiliated members | China |
| Ronly Holdings Ltd. | Affiliated members | United Kingdom |
| S.K. Sarawagi and Co. Pvt. Ltd. | Ordinary members | India |
| Sibelco Europe Mineralsplus | Affiliated members | Netherlands |
| Simpac Metal Co., Ltd. | Ordinary members | South Korea |
| Shaanxi Sinian Metal & Mining Co., Ltd. | Affiliated members | China |
| Sinosteel Resources Co., Ltd. | Ordinary members | China |
| South32 | Ordinary members | Australia |
| Sumitomo Corporation | Affiliated members | Japan |
| Kalon Resources Pte Ltd. | Affiliated members | Singapore |
| Tosoh Corporation | EPD Members | Japan |
| Transalloys (Pty) Ltd. | Ordinary members | South Africa |
| Traxys North America, LLC | Affiliated members | USA |
| Tshipi é Ntle Manganese Mining (Pty) Limited | Ordinary members | South Africa |
| Vale | Ordinary members | Brazil |
| Vietnam Haiduong New Resources Metallurgy Shareholdings Company | Ordinary members | Vietnam |
| World Metals & Alloys (FZC) | Affiliated members | UAE |
| JFE Shoji Corporation | Affiliated members | Japan |
| Oldendorff Carriers | Affiliated members | Singapore |
| Shanghai Qunxian International Trace Co., Ltd. | Affiliated members | China |
| Bosai Minerals Group Co., Ltd. | Ordinary members | China |
| Tata Steel Limited | Ordinary members | India |
| Guangxi Hourong Trading Company | Affiliated members | China |
| Ningxia Jiyuan Metallurgical Group Co., Ltd. | Ordinary members | China |
| Euro Manganese Inc. | Chemical products division | Canada |
| Gulf Manganese Corporation Limited | Ordinary members | Australia |
| Inner Mongolia Fuyuan Ferroalloy Co., Ltd. | Ordinary members | China |
| Sojitz Corporation | Affiliated members | Japan |
| S.J. Bell Company | Affiliated members | USAZ |
| NG Global Energy Solutions | Ordinary members | South Africa |
| Xallas Electricidad y Aleaciones S.A.U. | Ordinary members | Spain |
| Adelphi Mineral Corporation Ltd. | Ordinary members | Zambia |
| Inner Mongolia Xinchuang Metallurgical Group Co., Ltd. | Ordinary members | China |
