| Company | Membership Level | Country |
|---|
| Bank of Montreal | Full Member | Canada |
| BASF Metals Limited | Full Member | United Kingdom |
| Canadian Imperial Bank of Commerce | Full Member | Canada |
| Goldman Sachs International ** | Full Member | USA |
| Heraeus Metals Germany GmbH & Co. KG | Full Member | Germany |
| HSBC Bank PLC | Full Member | United Kingdom |
| ICBC Standard Bank PLC ** | Full Member | United Kingdom |
| JM ZJG | Full Member | China |
| Johnson Matthey PLC | Full Member | United Kingdom |
| JP Morgan Chase Bank ** | Full Member | USA |
| Metalor Technologies SA | Full Member | Switzerland |
| Mitsubishi Corporation International (Europe) Plc | Full Member | United Kingdom |
| MKS PAMP SA | Full Member | Switzerland |
| Sabin Metal Corporation | Full Member | USA |
| Standard Chartered Bank ** | Full Member | United Kingdom |
| Tanaka Kikinzoku Kogyo K.K. | Full Member | Japan |
| The Toronto-Dominion Bank ** | Full Member | Canada |
| UBS AG ** | Full Member | Switzerland |
| Valcambi SA | Full Member | Switzerland |