| Symbol | Name | Country | Exchange |
|---|---|---|---|
| PUR | Pure Wafer Plc | UK | LSE |
| RBW | Rainbow Rare Earths Limited | UK | LSE |
| RHIM | Rhi Magnesita N.V. | UK | LSE |
| RIO | Rio Tinto Plc | UK | LSE |
| ROCK | Rockfire Resources Plc | UK | LSE |
| RWI | Renewi Plc | UK | LSE |
| SAV | Savannah Resources Plc | UK | LSE |
| SLP | Sylvania Platinum Limited | UK | LSE |
| SML | Strategic Minerals Plc | UK | LSE |
| SNGR | SNGN Romgaz SA | UK | LSE |
| SOLG | Solgold Plc | UK | LSE |
| SRES | Sunrise Resources Plc | UK | LSE |
| SVE | Starvest Plc | UK | LSE |
| SWG | Shearwater Group Plc | UK | LSE |
| TKO | Taseko Mines Limited | UK | LSE |
| TOM | Tomco Energy Plc | UK | LSE |
| TRR | Trident Resources PLC | UK | LSE |
| TYM | Tertiary Minerals Plc | UK | LSE |
| UFO | Alien Metals Limited | UK | LSE |
| URU | Uru Metals Limited | UK | LSE |