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Company Name |
Location |
Area |
Year |
Class |
Box No |
Company No |
| Quarry House Lead Mining Co. Ltd | Knowsgate | Northumberland | 1874 | BT31 | 1934 | 8028 |
| Quarry Mine Holywell Ltd | Holywell | Flintshire | 1900 | BT31 | 9089 | 67292 |
| Quartz Reduction Co. Ltd | California | U.S.A. | 1856 | BT31 | 7 | 49 |
| Quaw Badoo Mines Ltd | 1901 | BT31 | 9431 | 70074 | ||
| Quebrada Copper & Silver Mines Ltd | Venezuela | 1888 | BT31 | 4170 | 26959 | |
| Queen Charlotte Mining & Prospecting Co. Ltd | 1908 | BT31 | 12526 | 99732 | ||
| Queen of Tamar Silver Lead & Copper Mining Co. Ltd | Beer Ferris | Devon | 1859 | BT31 | 411 | 1582 |
| Queen of Tamar Silver Lead & Copper Mining Co. Ltd | Beer Ferris | Devon | BT41 | 586 | 3192 | |
| Queen of the Hills Silver Mines Ltd | 1892 | BT31 | 5278 | 36004 | ||
| Queen of the Mountain Mining Co. Ltd | Halkyn | Flintshire | 1879 | BT31 | 2533 | 13131 |
| Queen Silver & Copper Mining Co. Ltd | Calstock | Cornwall | 1870 | BT286 | 196 | |
| Queenangen Mining Association | BT41 | 586 | 3193 | |||
| Queen’s Silver Lead Mining Co. Ltd | Wales | 1873 | BT31 | 1926 | 7949 | |
| Queensland (I.R.) Refractory Ore Syndicate Ltd | Queensland | Australia | 1906 | BT31 | 11436 | 87923 |
| Queensland Minerals Exploration Co. Ltd | Queensland | Australia | 1888 | BT31 | 4057 | 25920 |
| Queensland Quicksilver Estates Ltd | Queensland | Australia | 1886 | BT31 | 3588 | 22046 |
| Queensland Smelting Co. Ltd | Queensland | Australia | 1899 | BT31 | 8283 | 60151 |
| Queensland Smelting Co. Ltd | Queensland | Australia | 1888 | BT31 | 4194 | 27126 |
| Quicksilver Mines (California U.S.A.) Ltd | 1898 | BT31 | 7908 | 56675 | ||
| Quindis Quicksilver Mines Ltd | 1890 | BT31 | 4836 | 32069 | ||
| Quintin Mining Co. Ltd | 1911 | BT31 | 19860 | 114117 | ||
| Quither Manganese Mining Co. Ltd | Milton Abbot | Devon | 1873 | BT286 | 336 | |
| R. Bell & Co. Ltd | 1887 | BT31 | 14891 | 25305 | ||
| R.A. Briggs & Co. Ltd | 1923 | BT31 | 27941 | 190383 | ||
| R.D. West African Prospecting Syndicate Ltd | 1901 | BT31 | 9432 | 70080 | ||
| Radium Mining & Extraction Co. Ltd | 1912 | BT31 | 20987 | 124914 | ||
| Radium Ore Mines Ltd | South Terras | Cornwall | 1911 | BT31 | 32108 | 118110 |
| Rainbow Mine (Canada) Ltd | Canada | 1910 | BT31 | 19524 | 110236 | |
| Raithe Lead Mining Co. Ltd | 1920 | BT31 | 26087 | 169212 | ||
| Ramsay Lead Mining & Smelting Co. Ltd | Ontario | Canada | 1863 | BT31 | 729 | 173C |
| Rand D’or Mines Ltd | 1895 | BT31 | 6346 | 44831 | ||
| Rand Victoria Mines Ltd | 1895 | BT31 | 6434 | 45388 | ||
| Randt Consolidated Deep Levels Prospecting Syndicate Ltd | 1892 | BT31 | 5324 | 36463 | ||
| Ransgill Mining Co. Ltd | Bewerley | Yorkshire | 1874 | BT31 | 1973 | 8385 |
| Rara Fortuna Silver Mining Co. Ltd | Argentina | 1881 | BT31 | 2739 | 14861 | |
| Ras Messala Petroleum Prospecting Syndicate Ltd | 1911 | BT31 | 20108 | 116619 | ||
| Rashleigh Tin & Copper Mining Co. Ltd | St Blazey | Cornwall | 1880 | BT286 | 506 | |
| Ravenscliff Mining Co. Ltd | New Zealand | 1890 | BT31 | 4798 | 31768 | |
| Ravenscliff Mining Co. Ltd | New Zealand | 1877 | BT31 | 2329 | 11331 | |
| Ray Copper Mines Ltd | 1899 | BT31 | 8573 | 62433 | ||
| Rayfield (Cornwall) Tin Syndicate Ltd | Zennor | Cornwall | 1912 | BT31 | 20825 | 123393 |
| Rayfield (Nigeria) Tin Fields Ltd | Nigeria | 1912 | BT31 | 20657 | 121901 | |
| Rayfield Syndicate Ltd | Cornwall | 1910 | BT31 | 13350 | 111276 | |
| Reafadda Mining Co. Ltd | Reafadda | Ireland | 1871 | BT31 | 1631 | 5583 |
| Red Fox Dredging & Sluicing Mining Co. Ltd | 1913 | BT31 | 21303 | 127780 | ||
| Red Hematite Iron Ore Co. (Lonsdale Mines) Ltd | Frizington | Cumberland | 1865 | BT31 | 1152 | 2422C |
| Red Hill Mining Co. Ltd | BT41 | 592 | 3242 | |||
| Red Mine Briquette Co. Ltd | 1911 | BT31 | 19828 | 113791 | ||
| Red Mountain Mines Ltd | 1881 | BT31 | 2798 | 15310 | ||
| Red Mountain Silver Mines Ltd | 1890 | BT31 | 4935 | 32902 | ||
| Red Rock Lead Mining Co. Ltd | Pontrhydygroes | Cardiganshire | 1876 | BT31 | 2282 | 10970 |
| Redhill Ltd | 1895-1905 | BT2 | 2982 | |||
| Redhill Mining Co. Ltd | Ireland | 1857 | BT31 | 224 | 708 | |
| Redhills Tin Mining Co. Ltd | Ireland | 1905 | BT31 | 10991 | 83541 | |
| Redington Quicksilver Co. Ltd | California | U.S.A. | 1871 | BT31 | 1643 | 5674 |
| Redruth Mining Exchange Co. Ltd | Redruth | Cornwall | 1880 | BT31 | 14649 | 14056 |
| Redruth Tin Mining Syndicate Ltd | Redruth | Cornwall | 1892 | BT31 | 5280 | 36032 |
| Reedy Creek Mining & Smelting Co. Ltd | 1869 | BT31 | 1449 | 4309 | ||
| Rees Hill Tin & Iron Mines Ltd | Cornwall | 1882 | BT31 | 2948 | 16493 | |
| Reese River Silver Mining Co. Ltd | Nevada | U.S.A. | 1865 | BT31 | 1114 | 2198C |
| Reform Mine Syndicate Co. Ltd | 1902 | BT31 | 9861 | 73482 | ||
| Reform Mine Syndicate Co. Ltd | 1906 | BT31 | 11626 | 89846 | ||
| Refractories Industries Compensation Fund Ltd | 1919 | BT31 | 24318 | 152484 | ||
| Refractory Ore Extraction Syndicate Ltd | 1904 | BT31 | 10918 | 82860 | ||
| Refractory Ores Reduction Co. Ltd | 1891 | BT31 | 5061 | 34009 | ||
| Refugio Mining Co. Ltd | 1895-1902 | BT2 | 2853 | |||
| Rein River (Nigeria) Tin Mining Co. Ltd | 1910 | BT31 | 19756 | 113043 | ||
| Reina Victoria Mining Co. Ltd | Nigeria | 1906 | BT31 | 11726 | 90868 | |
| Reinnie Laxey Mining Co. Ltd | Maughold | Isle of Man | 1865 | BT31 | 1074 | 1967C |
| Releath Tin & Copper Mining Co. Ltd | 1859 | BT31 | 426 | 1648 | ||
| Releath Tin & Copper Mining Co. Ltd | Wendron | Cornwall | 1859 | BT41 | 593 | 3249 |
| Reliance Safety Mine Cage Syndicate Ltd | 1908 | BT31 | 12412 | 98282 | ||
| Renishaw Silver Mining Co. Ltd | 1871 | BT31 | 1641 | 5656 | ||
| Reperry Tin & Copper Mining Co. Ltd | Lanivet | Cornwall | 1870 | BT286 | 200 | |
| Reppen Mines Syndicate Ltd | 1900 | BT31 | 8923 | 65795 | ||
| Republican Mountain Silver Mines Ltd | Colorado | U.S.A. | 1880 | BT31 | 2690 | 14453 |
| Respryn Copper Mining Co. Ltd | St Winnow | Cornwall | 1860 | BT31 | 518 | 2069 |
| Restinnis Haematite Iron Ore Mining Co. Ltd | 1872 | BT286 | 316 | |||
| Restormel Iron Mining Co. Ltd | Lostwithiel | Cornwall | 1874 | BT286 | 367 | |
| Reyrolle Belmos Peebles Mining Sales Ltd | 1982 | BT2 | 1982 | 44246 | ||
| Rhafna Lead Mining Co. Ltd | Llanrhychwyn | Caernarvonshire | 1862 | BT31 | 705 | 57C |
| Rheidol Lead Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1873 | BT31 | 1883 | 7522 |
| Rheidol Mining Co. Ltd | Llanbadan-y-Creuddyn | Cardiganshire | 1900 | BT31 | 16549 | 68326 |
| Rhenish Consolidated Mining Co. Ltd | 1863 | BT31 | 821 | 638C | ||
| Rhenish Silver Lead Zinc Co. Ltd | Nassau | Germany | 1872 | BT31 | 1797 | 6853 |
| Rhine & Moselle Lead & Zinc Mining Co. Ltd | BT41 | 594 | 3257 | |||
| Rhine & Moselle Lead & Zinc Mining Co. Ltd | 1860 | BT31 | 463 | 1793 | ||
| Rhine & Moselle Mining Co. Ltd | 1879 | BT31 | 2483 | 12740 | ||
| Rhine Mining Co. Ltd | Rhenish Prussia | Germany | 1870 | BT31 | 1516 | 4747 |
| Rhiw Manganese Mines Ltd | Rhiw | Caernarvonshire | 1908 | BT31 | 12256 | 96468 |
| Rhodes (Mexican) Mining & General Ltd | Mexico | 1920 | BT31 | 26002 | 168298 | |
| Rhodes (Mexican) Mining Syndicate Ltd | Mexico | 1919 | BT31 | 25161 | 160031 | |
| Rhodesia Mines Ltd | Rhodesia | 1898 | BT31 | 7973 | 57278 | |
| Rhodesian Land & Mine Owners Association | Rhodesia | 1902 | BT31 | 9982 | 74533 | |
| Rhodesian Mines Acquisition Syndicate Ltd | Rhodesia | 1902 | BT31 | 9771 | 72798 | |
| Rhodesian Mining & Land Co. Ltd | Rhodesia | 1912 | BT31 | 32134 | 124351 | |
| Rhodesian Prospecting Syndicate Ltd | Rhodesia | 1910 | BT31 | 13046 | 106892 | |
| Rhodesian Refractory Minerals Process Ltd | Rhodesia | 1910 | BT31 | 19785 | 113350 | |
| Rhondda Engineering & Mining Co. Ltd | 1917 | BT31 | 23540 | 145930 | ||
| Rhosesmor Mine Ltd | Halkyn | Flintshire | 1889 | BT31 | 4518 | 29524 |
| Rhosesmor Mining Co. Ltd | Halkyn | Flintshire | 1869 | BT31 | 1469 | 4462 |
| Rhoswydd Lead Mining Co. Ltd | Cadfarch | Montgomeryshire | 1868-1885 | BT2 | 299 | |
| Rhydalun Mining Co. Ltd | Mold | Flintshire | 1879 | BT31 | 2552 | 13285 |
| Rhydtalog Silver Lead Mining Co. Ltd | Llanddewi Brefi | Cardiganshire | 1870 | BT31 | 1515 | 4741 |
| Rhydwen Silver Lead Mining Co. Ltd | Whitford | Flintshire | 1889 | BT31 | 4320 | 28062 |
| Rhyscog Mining Co. Ltd | Dolwyddelan | Cardiganshire | BT41 | 595 | 3264 | |
| Rhyscog Mining Co. Ltd | Llanddewi Brefi | Cardiganshire | 1860 | BT31 | 497 | 1965 |
| Ribden Mining Co. Ltd | Alton | Staffordshire | 1858 | BT31 | 331 | 1178 |
| Ribden Mining Co. Ltd | Alton | Staffordshire | 1858 | BT41 | 595 | 3265 |
| Richmond Consolidated Mining Co. Ltd | Nevada | U.S.A. | 1871 | BT31 | 1634 | 5605 |
| Rincon Silver Lead Mine Ltd | 1898 | BT31 | 7819 | 55951 | ||
| Rio Caris Jet Mines Ltd | 1886 | BT31 | 3759 | 23438 | ||
| Rio Luna Mines Ltd | 1893 | BT31 | 5580 | 38840 | ||
| Rio Malagon (Sulphur Copper & Silver) Mines Ltd | Spain | 1881 | BT31 | 2850 | 15679 | |
| Rio Sil Mining Co. Ltd | Spain | 1883 | BT31 | 3107 | 17820 | |
| Ripanji Mines Ltd | 1899 | BT31 | 8644 | 63021 | ||
| Ripanji Quicksilver & Silver Mines Co. Ltd | 1887 | BT31 | 3929 | 24872 | ||
| Ripanji Quicksilver & Silver Mines Co. Ltd | 1891 | BT31 | 5139 | 34698 | ||
| Ripanji Quicksilver & Silver Mines Ltd | 1895 | BT31 | 6300 | 44593 | ||
| Ritton Castle Mining Co. Ltd | Shelve | Shropshire | 1866 | BT31 | 189 | 566 |
| Ritton Castle Mining Co. Ltd | Shelve | Shropshire | 1860 | BT41 | 597 | 3278 |
| River Tamar Copper Mining Co. Ltd | Calstock | Cornwall | 1857 | BT41 | 597 | 3282 |
| Riviera Prospecting Syndicate Ltd | 1904 | BT31 | 10783 | 81739 | ||
| Roaring Water Mining Co. Ltd | Aughadown | Ireland | 1862 | BT31 | 707 | 66C |
| Robin Hood Mining Co. Ltd | BT41 | 598 | 3284 | |||
| Robin Hood Mining Co. Ltd | MN | 1858 | BT31 | 339 | 1219 | |
| Roborough Down Tin & Copper Mining Co. Ltd | Buckland Monachorum | Devon | 1863 | BT286 | 23 | |
| Rock Hill Tin Mines Ltd | Bugle | Cornwall | 1907 | BT31 | 18030 | 92513 |
| Rock Mill & Trethevy Tin & Copper Mining Co. Ltd | Cornwall | 1860 | BT31 | 479 | 1875 | |
| Rock Mill & Trethevy Tin & Copper Mining Co. Ltd | Cornwall | BT41 | 598 | 3290 | ||
| Rocks Tin Mining Co. Ltd | Bugle | Cornwall | 1880 | BT286 | 512 | |
| Rockwell Silver Mines Ltd | New South Wales | Australia | 1888 | BT31 | 4076 | 26096 |
| Rodderup Fell Lead Mining Co. Ltd | Tynehead | Cumberland | 1880 | BT31 | 2608 | 13760 |
| Roman Boundary Mine Co. Ltd | Worthen | Shropshire | 1876 | BT31 | 2270 | 10874 |
| Roman Gravels Boundary Mining Co. Ltd | Worthen | Shropshire | 1881 | BT31 | 2909 | 16190 |
| Roman Gravels Lead Mining Co. Ltd | Worthen | Shropshire | 1860 | BT31 | 448 | 1733 |
| Roman Gravels Lead Mining Co. Ltd | Worthen | Shropshire | BT41 | 599 | 3292 | |
| Roman Gravels Mining Co. Ltd | Worthen | Shropshire | 1871 | BT31 | 1585 | 5224 |
| Roof Mine Ltd | 1934 | BT31 | 33518 | 288870 | ||
| Rookhope Lead Mining Co. Ltd | Rookhope | Durham | 1876 | BT31 | 2206 | 10382 |
| Rookhope Valley Mining Co. Ltd | Stanhope | Durham | 1872 | BT31 | 1714 | 6226 |
| Rose & Chiverton United Silver Lead Mining Co. Ltd | Newlyn East | Cornwall | 1867 | BT286 | 139 | |
| Rose Mining Syndicate Ltd | 1920 | BT31 | 26080 | 169132 | ||
| Rosecliff & Tolcarne Consolidated Silver Lead Mining Co. Ltd | St Colomb | Cornwall | 1865 | BT286 | 93 | |
| Rosemergy & Morvah Syndicate Ltd | Morvah | Cornwall | 1908 | BT31 | 12372 | 97786 |
| Rosewarne Ltd | Gwinear | Cornwall | 1908 | BT31 | 12411 | 98265 |
| Roskear Ltd | Camborne | Cornwall | 1902 | BT31 | 9878 | 73600 |
| Roskear Mining & Calcining Co. Ltd | Camborne | Cornwall | 1899 | BT31 | 8669 | 63245 |
| Ross Development Syndicate Ltd | Ireland | 1907 | BT31 | 12004 | 93695 | |
| Rossie & Canada Lead Co. Ltd | New York | U.S.A. | 1856 | BT31 | 160 | 480 |
| Rossland Great Western Mines Ltd | 1900 | BT31 | 8985 | 66405 | ||
| Rossmore Slate Co.Ltd. | Ireland | 1864 | BT31 | 977 | 1423C | |
| Rota Anna Mines Ltd | 1899 | BT31 | 8707 | 63585 | ||
| Rotary Smelting Limited | 1930 | BT31 | 33179 | 248432 | ||
| Rothesay Mining Co. Ltd | 1910 | BT31 | 13296 | 110392 | ||
| Round Hill Syndicate Ltd | Devon | 1890 | BT31 | 4919 | 32767 | |
| Rowley Head Mining Co. Ltd | Hexham | Northumberland | 1872 | BT31 | 1678 | 5964 |
| Rowleyburn Lead Mining Co. Ltd | Hexham | Northumberland | 1884 | BT31 | 3283 | 19362 |
| Royal (Forest of Dean) Mining | Gloucestershire | 1862 | BT31 | 669 | 2838 | |
| Royal Consolidated Copper Mines | 1856 | BT31 | 2 | 16 | ||
| Royal Consolidated Copper Mines of San Fernando Cuba Ltd | BT41 | 601 | 3311 | |||
| Royal Silver Mines of Potosi Bolivia Ltd | Bolivia | 1884 | BT31 | 3365 | 20062 | |
| Royal West India Mining Co | BT41 | 749 | 4040 | |||
| Royalberg Copper Mines Ltd | 1903 | BT31 | 10272 | 77153 | ||
| Royalton Tin Mine Co. Ltd | St Colomb | Cornwall | 1881 | BT31 | 2876 | 15900 |
| Ruapehu Prospecting Syndicate Ltd | 1897 | BT31 | 7201 | 50922 | ||
| Rubber & Mining Agencies Ltd | 1911 | BT31 | 20362 | 119160 | ||
| Rubber & Mining Investments Ltd | 1956 | BT31 | 37902 | 565191 | ||
| Rubber, Mining & Land Trust Ltd | 1911 | BT31 | 13544 | 114619 | ||
| Ruby & Dunderberg Consolidated Mining Co. Ltd | Nevada | U.S.A. | 1879 | BT31 | 2546 | 13242 |
| Ruby Consolidated Mining Co. Ltd | Nevada | U.S.A. | 1872 | BT31 | 1717 | 6247 |
| Ruby Mica Mining Co. Ltd | 1936 | BT31 | 33684 | 320658 | ||
| Ruby Nevada Mines Ltd | Nevada | U.S.A. | 1895 | BT31 | 6531 | 45966 |
| Rukuba (Nigeria) Tin Mining Co. Ltd | 1912 | BT31 | 20440 | 119952 | ||
| Russ General Mining Syndicate Ltd | 1907 | BT31 | 11869 | 92290 | ||
| Russell Copper Mine Ltd | Tavistock | Devon | 1883 | BT31 | 3160 | 18311 |
| Russell Mines Co. Ltd | Tavistock | Devon | 1889 | BT31 | 4545 | 29763 |
| Russell Mines Ltd | Tavistock | Devon | 1891 | BT31 | 5140 | 34704 |
| Russell United Mines Co. Ltd | Tavistock | Devon | 1881 | BT31 | 2853 | 15700 |
| Russia Copper Co. Ltd | Russia | 1871 | BT31 | 1635 | 5607 | |
| Russian Mining Corporation Ltd | Russia | 1911 | BT31 | 33786 | 113559 | |
| Russian Mining Corporation Ltd | Russia | 1906 | BT31 | 11728 | 90881 | |
| Ruthern Tin Mining Corporation Ltd | 1913 | BT31 | 21249 | 127287 | ||
| Ruther’s Iron & Manganese Mines Co. Ltd | 1884 | BT286 | 556 | |||
| Ruther’s Iron & Manganese Mines Co. Ltd | 1885 | BT286 | 28 | |||
| S”ndre Vinoren (Norway) Silver Mines Ltd | Norway | 1888 | BT31 | 4287 | 27821 | |
| S.A. Prospecting & Concessions Syndicate Ltd | 1905 | BT31 | 17590 | 86359 | ||
| S.A.M. Mining Syndicate Ltd | 1926 | BT31 | 32798 | 218572 | ||
| S.G. Mine Syndicate Ltd | 1888 | BT31 | 4135 | 26654 | ||
| S.G. Minerals Syndicate Ltd | Cornwall | 1906 | BT31 | 31934 | 87773 | |
| Sabiwa Proprietary Mines Ltd | 1901 | BT31 | 9366 | 69561 | ||
| Saddleback Mining Co. Ltd | Mungrisedale | Cumberland | 1873-1880 | BT2 | 529 | |
| Safety Blasting Powder Co. Ltd | 1881 | BT31 | 2878 | 15910 | ||
| Saint Cuthbert Lead Smelting Co. Ltd | Priddy | Somerset | 1863 | BT31 | 727 | 167C |
| Salamanca Tin Co. Ltd | Spain | 1887 | BT31 | 3807 | 23865 | |
| Salmantina Tin Mining Co. Ltd | 1911 | BT31 | 13604 | 115752 | ||
| Salonica Mining Co. Ltd | 1882 | BT31 | 2976 | 16734 | ||
| Salter & Eskatt Park Mining Co. Ltd | Salter & Eskett | Cumberland | 1866 | BT31 | 1252 | 3010 |
| Salter Mining Co. Ltd | Cleator Moor | Cumberland | 1906 | BT31 | 11435 | 87912 |
| Saltpetre Prospecting Co. Ltd | 1894 | BT31 | 5804 | 40707 | ||
| Salvador Mines Ltd | 1895 | BT31 | 6552 | 46115 | ||
| Sams Wealth Mines Development Co. Ltd | 1896 | BT31 | 7156 | 50508 | ||
| San Antonio Mining & Smelting Co. Ltd | 1920 | BT31 | 32387 | 164321 | ||
| San Antonio Mining & Smelting Co. Ltd | 1920 | BT31 | 32387 | 164321 | ||
| San Bartholome Silver Lead Mines, Ltd | 1908 | BT31 | 12538 | 99873 | ||
| San Bartolo Copper Mines Ltd (The) | 1897 | BT31 | 7567 | 53954 | ||
| San Bernardo Silver Mines Ltd | Colorado | U.S.A. | 1890 | BT31 | 4914 | 32721 |
| San Bernardo Syndicate Ltd | Colorado | U.S.A. | 1890 | BT31 | 4714 | 31088 |
| San Feliciano Iron Ores Co. Ltd | 1888 | BT31 | 3871 | 24426 | ||
| San Finx Tin Mines Ltd | 1897 | BT31 | 7306 | 51722 | ||
| San Francisco Del Oro Mines Ltd | 1903 | BT31 | 10263 | 77075 | ||
| San Francisco Del Oro Mining Co. Ltd | 1908 | BT31 | 18582 | 99976 | ||
| San Jorge Nitrate Co. Ltd | Argentina | 1888 | BT31 | 4286 | 27813 | |
| San Juan Mining Co. Ltd | 1886-1889 | BT2 | 1504 | |||
| San Mateo Silver Mines of Peru Ltd | 1891 | BT31 | 5214 | 35343 | ||
| San Miguel Mining Co. Ltd | 1881 | BT31 | 2760 | 15035 | ||
| San Miguel Silver Mines Ltd | 1892 | BT31 | 5355 | 36745 | ||
| San Pedro & Agra Land Grants Mining Co. Ltd | 1871 | BT31 | 1641 | 5660 | ||
| San Pedro (Chili) Copper Mining Co. Ltd | 1872 | BT31 | 1696 | 6088 | ||
| San Pedro (Chili) Copper Mining Co. Ltd | 1880 | BT31 | 2662 | 14170 | ||
| San Pedro Del Monte Silver Mining Co. Ltd | Mexico | 1865 | BT31 | 1070 | 1942C | |
| San Rogue Mining & Smelting Co. Ltd | BT41 | 618 | 3374 | |||
| San Roque Mining & Smelting Co. Ltd | 1859 | BT31 | 420 | 1619 | ||
| San Vicente Freehold Lead & Zinc Mining Co. Ltd | 1880 | BT31 | 2717 | 14674 | ||
| Sanbar Mining Syndicate Ltd | 1913 | BT31 | 14047 | 126448 | ||
| Sand Lodge Mine Ltd | Sandwick | Shetland | 1921 | BT31 | 26677 | 175600 |
| Sand Lodge Mine Ltd | Sandwick | Shetland | 1921 | BT31 | 26677 | 175600 |
| Sandscale Mining Co. Ltd | Askam & Ireleth | Lancashire | 1877 | BT31 | 2343 | 11451 |
| Sandy Mount Foundry Company Ltd | Ireland | 1906 | BT31 | 11450 | 88055 | |
| Sandyford Lead Mining Co. Ltd | Hunstanworth | Durham | 1882 | BT31 | 3035 | 17192 |
| Sansu Mine Ltd | 1905 | BT31 | 11254 | 85995 | ||
| Santa Ana Mine Ltd | 1892 | BT31 | 5238 | 35605 | ||
| Santa Ana Mining Co | BT41 | 618 | 3375 | |||
| Santa Clara Silver Lead Mining Co. Ltd | Llanboidy | Carmarthenshire | 1869 | BT31 | 1440 | 4255 |
| Santa Cruz Sulphur & Copper Co. Ltd | 1881 | BT31 | 2770 | 15105 | ||
| Santa Elena Mining & Silver Ore Reduction Co | BT41 | 618 | 3376 | |||
| Santa Elena Silver Mining Co. Ltd | Mexico | 1859 | BT31 | 439 | 1696 | |
| Santa Elena Silver Mining Co. Ltd | BT41 | 618 | 3377 | |||
| Santa Fiora Mercury Mines Ltd | 1898 | BT31 | 7786 | 55663 | ||
| Santa Ines Mining Co. Ltd | 1906 | BT31 | 11574 | 89322 | ||
| Santa Luisa Iron Mining Co. Ltd | 1875 | BT31 | 2105 | 9519 | ||
| Santa Maria Silver Mines Ltd | 1885 | BT31 | 3566 | 21842 | ||
| Santa Rosa Mining Co. Ltd | 1910 | BT31 | 32081 | 112878 | ||
| Santa Rosa Rubber & Prospecting Syndicate Ltd | 1905 | BT31 | 11322 | 86674 | ||
| Santa Sofia Antimony Mines Ltd | 1902 | BT31 | 10060 | 75258 | ||
| Santander Mining Co. Ltd | BT41 | 618 | 3378 | |||
| Santander Mining Co. Ltd (1857) | 1857-1858 | BT31 | 318 | 1108 | ||
| Santander Zinc Mining Co. Ltd | 1873 | BT31 | 1845 | 7227 | ||
| Santiago Mining Co. Ltd | 1871 | BT31 | 1668 | 5897 | ||
| Santo Ecce Homo Mine Ltd | 1899 | BT31 | 16119 | 60306 | ||
| Sao Cyriaco Mining Co. Ltd | 1876 | BT31 | 2268 | 10855 | ||
| Sao Vicente Mining Co. Ltd | Brazil | 1868 | BT31 | 1391 | 3919 | |
| Saturn Silver Mining Co. Ltd | Utah | U.S.A. | 1871 | BT31 | 1630 | 5570 |
| Saudi Arabian Mining Syndicate Ltd | Saudi Arabia | 1934 | BT31 | 33513 | 288154 | |
| Saxon Tin & Wolfram Mining Co. Ltd | 1913 | BT31 | 21275 | 127500 | ||
| Scandinavian Mining Syndicate Ltd | 1912 | BT31 | 20593 | 121369 | ||
| Scargill Lead Mining & Smelting Co. Ltd | Barnard Castle | Yorkshire | 1882 | BT31 | 3073 | 17531 |
| Scarts Barytes & Minerals Co. Ltd | Ireland | 1873 | BT31 | 1814 | 6992 | |
| Schull Bay Copper Mining Co. Ltd | Ireland | BT41 | 620 | 3388 | ||
| Schull Bay Copper Mining Co. Ltd | Ireland | 1859 | BT31 | 430 | 1661 | |
| Schull Copper Mining Co. Ltd | Ireland | 1906 | BT31 | 17726 | 88325 | |
| Schull Copper Mining Co. Ltd | Ireland | 1906 | BT31 | 17726 | 88325 | |
| Schull Copper Syndicate Ltd | Ireland | 1892 | BT31 | 5421 | 37398 | |
| Schwarzenburg Silver Lead Mines Syndicate Ltd | 1893 | BT31 | 5645 | 39365 | ||
| Scordale Lead Mines Syndicate Ltd | Appleby | Westmorland | 1891 | BT31 | 5131 | 34622 |
| Scottish African Corporation Ltd | 1895-1906 | BT2 | 2974 | |||
| Scottish Australian Mining Co. Ltd | Australia | 1858 | BT41 | 622 | 3392 | |
| Scottish Australian Mining Co. Ltd | New South Wales | Australia | 1858 | BT31 | 37642 | 1417 |
| Scottish Colarado Mining & Smelting Co. Ltd | 1884-1895 | BT2 | 1324 | |||
| Scottish Gympie Freehold Mining Syndicate Ltd | nd | BT2 | 3748 | |||
| Scottish Italian Copper & Lead Mining Co. Ltd | 1873-1874 | BT2 | 494 | |||
| Scottish Mining Finance & Exploration Trust Ltd | 1909 | BT31 | 18951 | 104309 | ||
| Scottish Pacific Coast Mining Co. Ltd | 1881-1899 | BT2 | 1018 | |||
| Scottish Rhodesia Ltd | 1895-1906 | BT2 | 2981 | |||
| Scottish West Australian Explorers Ltd | 1894-1896 | BT2 | 2783 | |||
| Scottish-Chilian Mining Syndicate Ltd | 1912 | BT31 | 13996 | 124769 | ||
| Searle Mining Co. Ltd | 1875 | BT31 | 2097 | 9449 | ||
| Seglenlas Mine Co. Ltd | Llanidloes | Montgomeryshire | 1863 | BT31 | 844 | 754C |
| Sellars Prospecting & Development Syndicate Ltd | 1903 | BT31 | 10286 | 77257 | ||
| Selva Di Progno Mining Co. Ltd | 1909 | BT31 | 12648 | 101330 | ||
| Sempress Mining Co. Ltd | Flintshire | 1877 | BT31 | 2375 | 11759 | |
| Sentein Mining Co. Ltd | 1878 | BT31 | 2455 | 12502 | ||
| Servian Mining Concessions Ltd | 1913 | BT31 | 21320 | 127886 | ||
| Settle Mining Co. Ltd | Settle | Yorkshire | 1868 | BT31 | 1427 | 4174 |
| Severn Mines Co | Llanidloes Without | Montgomeryshire | BT41 | 626 | 3414 | |
| Severn Mines Co * | Llanidloes | Montgomeryshire | 1857 | BT31 | 289 | 994 |
| Seyssel Volant-Perrette Mine Co. Ltd | 1872 | BT31 | 1733 | 6380 | ||
| Shahzada Mines Ltd | 1895 | BT31 | 6487 | 45681 | ||
| Shale Mining Co. Ltd | 1906 | BT31 | 17865 | 90188 | ||
| Shallee Silver Lead Mine Ltd | Ireland | 1913 | BT31 | 21167 | 126566 | |
| Sheepstor & Lyd River United Mining Co | Sheepstor | Devon | 1865 | BT286 | 105 | |
| Sheldon Mining Co. Ltd | Bakewell | Derbyshire | 1884 | BT31 | 3274 | 19273 |
| Shelton Iron & Steel Co. Ltd | 1886 | BT31 | 3655 | 22608 | ||
| Shelve District Mining & Drainage Co. Ltd | Shelve | Shropshire | 1900 | BT31 | 9036 | 66841 |
| Shemara Mining Co. Ltd | 1907 | BT31 | 12159 | 95399 | ||
| Shepherds United Ltd | Breage | Cornwall | 1885 | BT31 | 3515 | 21404 |
| Shepherd’s Wheal Rose Lead Mining Co. Ltd | Perranzabuloe | Cornwall | 1874 | BT286 | 387 | |
| Shepperd’s Mining Co. Ltd | nd | BT2 | 5430 | |||
| Shettleston Oil & Chemical Co. Ltd | Glasgow | Lanarkshire | 1890 | BT2 | 2094 | |
| Shirvan Copper Mining Co. Ltd | 1867 | BT31 | 1340 | 3553 | ||
| Shropshire Blackwood Mining Co. Ltd | Shropshire | 1856 | BT31 | 1 | 6 | |
| Shropshire Blackwood Mining Co. Ltd | Shropshire | BT41 | 631 | 3448 | ||
| Shropshire Copper Co. Ltd | Shropshire | 1867 | BT31 | 1348 | 3619 | |
| Shropshire Lead Mines Ltd | Shropshire | 1910 | BT31 | 19720 | 112600 | |
| Shropshire Mining Co. Ltd | Shropshire | 1866 | BT31 | 1212 | 2773C | |
| Shropshire United Mining Co. Ltd | Shelve | Shropshire | 1891 | BT31 | 5086 | 34225 |
| Shuniah Wenchu Mine Co. Ltd | 1886 | BT31 | 3761 | 23454 | ||
| Siamese Lead Mining Co. Ltd | 1925 | BT31 | 28910 | 203599 | ||
| Siberian Mining & Estates Co. Ltd | 1906 | BT31 | 11734 | 90934 | ||
| Sicilian Sulphur Mines Co. Ltd | 1870 | BT31 | 1542 | 4918 | ||
| Sicilian United Copper Mines Ltd | 1888 | BT31 | 4091 | 26239 | ||
| Siegena Sulphur Mining Co. Ltd | 1867 | BT31 | 1345 | 3595 | ||
| Sierra Almagrera Mining Co. Ltd | 1872 | BT31 | 1722 | 6297 | ||
| Sierra Jarena Mining Co. Ltd | 1870 | BT31 | 1563 | 5081 | ||
| Sierra Morena Mining Co. Ltd | Spain | 1885 | BT31 | 3446 | 20808 | |
| Sierra Morena Tin Co. Ltd | Spain | 1882 | BT31 | 2927 | 16318 | |
| Sigford Consols Tin & Copper Mining Co. Ltd | Ilsington | Devon | BT41 | 631 | 3453 | |
| Sigford Consols Tin & Copper Mining Co. Ltd | Ilsington | Devon | 1859 | BT31 | 409 | 1569 |
| Silica Mining & Trading Co. Ltd | 1945 | BT31 | 35783 | 401342 | ||
| Silver Bank Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1859 | BT31 | 426 | 1647 |
| Silver Bank Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1861 | BT41 | 632 | 3455 |
| Silver Bell Mining & Smelting Co. Ltd | Arizona | U.S.A. | 1890 | BT31 | 4814 | 31921 |
| Silver Brook Mining Co. Ltd | Goginan | Cardiganshire | 1866 | BT31 | 1279 | 3194 |
| Silver Chord Mining & Smelting Co. Ltd | 1882 | BT31 | 3067 | 17483 | ||
| Silver Glance Mines Ltd | 1890 | BT31 | 4918 | 32758 | ||
| Silver Hill Consols Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1871 | BT31 | 1652 | 5760 |
| Silver Hill Mining Co. Ltd | Calstock | Cornwall | 1881 | BT31 | 2749 | 14926 |
| Silver Lead Mines of Wales Ltd | Wales | 1907 | BT31 | 12159 | 95400 | |
| Silver Leaf Mining Syndicate (Canada) Ltd | 1924 | BT31 | 28740 | 200995 | ||
| Silver Mines of La Lux Ltd | 1890 | BT31 | 4790 | 31717 | ||
| Silver Mining Co of Norway Ltd | Norway | 1864 | BT31 | 961 | 1325C | |
| Silver Mountain Mines Co. of Port Arthur Ltd | Wales | 1886 | BT31 | 3702 | 23023 | |
| Silver Mountain United Mines Co. Ltd | Taliesin | Cardiganshire | 1862 | BT31 | 671 | 2851 |
| Silver Peak Mining Co. Ltd | Colorado | U.S.A. | 1880 | BT31 | 2702 | 14555 |
| Silver Plume Mining Co. Ltd | Colorado | U.S.A. | 1871 | BT31 | 1627 | 5552 |
| Silver Rake Mining Co. Ltd | Halkyn | Flintshire | 1861 | BT31 | 530 | 2129 |
| Silver Ridge Lead Mining Co. Ltd | Minnigaff | Kirkcudbrightshire | 1874 | BT31 | 1966 | 8340 |
| Silver Star Mining Co. Ltd | Nevada | U.S.A. | 1871 | BT31 | 1629 | 5558 |
| Silver Stream Mining Co. Ltd | Goginan | Cardiganshire | 1881 | BT31 | 2760 | 15033 |
| Silver Valley Mines Ltd | Ladock | Cornwall | 1881 | BT31 | 2793 | 15267 |
| Silver Vein Mining Co. Ltd | St Winnow | Cornwall | 1860 | BT31 | 466 | 1803 |
| Silver Vein Mining Co. Ltd | St Winnow | Cornwall | BT41 | 632 | 3456 | |
| Silverband Co. Ltd | Dufton | Westmorland | 1878 | BT31 | 2406 | 12052 |
| Silverfields Mining Co. Ltd | 1906 | BT31 | 17958 | 91422 | ||
| Silverlode Lead Mining Co. Ltd | Shallee | Ireland | 1880 | BT31 | 2619 | 13853 |
| Silverton Mines Ltd | 1887 | BT31 | 3848 | 24233 | ||
| Silverton Mining Co. Ltd | 1881 | BT31 | 2799 | 15318 | ||
| Simmer & Jack Deep Ltd | 1895 | BT31 | 6136 | 43476 | ||
| Simoona Mining Co. Ltd | 1935 | BT31 | 36706 | 297569 | ||
| Simplex Copper Extraction (Ireland) Syndicate Ltd | Ireland | 1904 | BT31 | 10616 | 80325 | |
| Simplex Copper Extraction Company Ltd | 1903 | BT31 | 1067 | 78055 | ||
| Simpson’s Prospecting Syndicate Ltd | 1895 | BT31 | 6392 | 45138 | ||
| Sinclair Lead & Blende Mines Ltd | Whitford | Flintshire | 1881 | BT31 | 2884 | 15969 |
| Sir B. Samuelson & Co. Ltd | Lockwood | Yorkshire | 1887 | BT31 | 31076 | 25072 |
| Sir Edward Lead Mining Co. Ltd | Holywell | Flintshire | 1867 | BT31 | 1367 | 3747 |
| Sir Walter Raleigh Mining Co. Ltd | Devon | 1895 | BT31 | 6188 | 43852 | |
| Skytmyr Copper Mines Ltd | 1888 | BT31 | 4035 | 25729 | ||
| Slate & Slab Quarry Co. of Ireland Ltd | Ireland | 1866 | BT31 | 1259 | 3061 | |
| Slocan Prospecting Syndicate Ltd | 1899 | BT31 | 8564 | 62364 | ||
| Smallwater Common Iron Mines Ltd | 1897 | BT31 | 7656 | 54648 | ||
| Smelting & Harbour Syndicate Ltd | 1900 | BT31 | 16401 | 65939 | ||
| Smelting & Refining Company of Australia (1901) Ltd | 1902 | BT31 | 9649 | 71734 | ||
| Smelting Company of Australia Ltd | 1895 | BT31 | 6342 | 44812 | ||
| Smelting Company of British Columbia Ltd | 1898 | BT31 | 8234 | 59726 | ||
| Smelting Company of Mexico Ltd | 1887 | BT31 | 3834 | 24121 | ||
| Smelting Corporation Ltd | 1902 | BT31 | 16837 | 74019 | ||
| Smelting Corporation Ltd | 1898 | BT31 | 7889 | 56529 | ||
| Smith’s Concession Syndicate Ltd | 1895-1899 | BT2 | 2958 | |||
| Smith’s Wood: Tin: & Copper Mining Co. Ltd | Ashburton | Devon | 1861 | BT31 | 535 | 2159 |
| Smittergill Head Lead Mining Co. Ltd | Ousby | Cumberland | 1857 | BT31 | 227 | 726 |
| Smittergill Head Lead Mining Co. Ltd | Ousby | Cumberland | 1857 | BT41 | 634 | 3469 |
| Snaefell Mining Co. Ltd | Lonan | Isle of Man | 1864 | BT31 | 1040 | 1773C |
| Snailbeach Lead Mining Co. Ltd | Snailbeach | Shropshire | 1885 | BT31 | 14804 | 21384 |
| Snailbeach Mine Co. Ltd | Snailbeach | Shropshire | 1867 | BT31 | 1347 | 3616 |
| Snelston Copper Mine Ltd | Snelston | Derbyshire | 1910 | BT31 | 19272 | 107913 |
| Snow Brook Plinlimmon Silver Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | BT41 | 635 | 3473 | |
| Snow Brook Plinlimmon Silver Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | 1858 | BT31 | 336 | 1201 |
| Snowbrook Silver Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | 1874 | BT31 | 2002 | 8609 |
| Snowbrook Silver Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | 1881 | BT31 | 2852 | 15698 |
| Snowbrook Silver Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | 1862 | BT31 | 655 | 2761 |
| Snowdon Mining Co. Ltd | Beddgelert | Caernarvonshire | 1866 | BT31 | 1233 | 2887C |
| Snowdrift Silver Mining & Reduction Co. Ltd | Colorado | U.S.A. | 1871 | BT31 | 1625 | 5537 |
| Societié Industrielle du Radium Ltd | South Terras | Cornwall | 1912 | BT31 | 32141 | 125420 |
| Solana Mining Co. Ltd | 1889-1893 | BT2 | 1880 | |||
| Sombrerete Silver Mines Co. Ltd | 1865 | BT31 | 1073 | 1960C | ||
| Somersetshire Manganese & Iron Ore Co. Ltd | Somerset | 1890 | BT31 | 4674 | 30760 | |
| Sonoma Mines of Mexico Ltd | 1899 | BT31 | 8751 | 64071 | ||
| Sonora Silver Mining Co. Ltd | Mexico | 1867 | BT31 | 1375 | 3804 | |
| Sonora Smelting Co. Ltd | 1893 | BT31 | 5704 | 39881 | ||
| Sopa Diamond Mine Ltd | 1911 | BT31 | 13529 | 114301 | ||
| Sorpresa Antimony Mines Ltd | 1895 | BT31 | 6185 | 43821 | ||
| Sortridge Copper Mining Co. Ltd | Whitchurch | Devon | 1881 | BT31 | 2785 | 15211 |
| Sortridge Tin Mining Co. Ltd | Whitchurch | Devon | 1888 | BT31 | 4086 | 26194 |
| Souback & Catir Alan Mining Co. Ltd | Turkey | 1880 | BT31 | 2731 | 14789 | |
| South Africa Silver & Copper Mining Co. Ltd | South Africa | 1871 | BT31 | 1641 | 5654 | |
| South African Copper Mining Co. Ltd | South Africa | 1863 | BT31 | 730 | 183C | |
| South African Exploration & Mining Co. Ltd | South Africa | 1888 | BT31 | 4118 | 26484 | |
| South African Farm Mines Ltd | South Africa | 1901 | BT31 | 9316 | 69247 | |
| South African Farming Trading & Mining Co. Ltd | South Africa | 1878 | BT31 | 2428 | 12281 | |
| South African Finance & Prospecting Syndicate Ltd | South Africa | 1889 | BT31 | 4590 | 30085 | |
| South African Mines & Contract Syndicate Ltd | South Africa | 1892 | BT31 | 5270 | 35927 | |
| South African Prospecting & Mortgage Corporation Ltd | South Africa | 1888 | BT31 | 4264 | 27652 | |
| South African Prospecting Syndicate Ltd | South Africa | 1902 | BT31 | 9647 | 71713 | |
| South African Republic Mining Co. Ltd | South Africa | 1873 | BT31 | 1889 | 7563 | |
| South American Smelting Co. Ltd | 1884 | BT31 | 3370 | 20089 | ||
| South Aurora Consolidated Mining Co. Ltd | 1873 | BT31 | 1825 | 7081 | ||
| South Aurora Silver Mining Co. Ltd | Nevada | U.S.A. | 1870 | BT31 | 1568 | 5114 |
| South Australian Consolidated Mining Co. Ltd | South Australia | Australia | 1877 | BT31 | 2364 | 11652 |
| South Australian Mining & Smelting Co. Ltd | 1885 | BT31 | 3577 | 21937 | ||
| South Barracas (Argentine) Gas Co. Ltd (The) | Argenitna | 1888 | BT31 | 4238 | 27460 | |
| South Berehaven Mining Co. Ltd | Kilcrohane | Ireland | 1884 | BT31 | 3325 | 19724 |
| South Bog Mining & Smelting Co | Shelve | Shropshire | 1857 | BT41 | 641 | 3501 |
| South Bog Mining & Smelting Co. Ltd | Shelve | Shropshire | 1857 | BT31 | 286 | 978 |
| South Bryngwiog Mining Co. Ltd | Halkyn | Flintshire | 1899 | BT31 | 16228 | 62740 |
| South Burma Mining Syndicate Ltd | Burma | 1925 | BT31 | 28954 | 204284 | |
| South Burma Tin Mines Ltd | Burma | 1905 | BT31 | 11270 | 86170 | |
| South Cambrian Mining Co. Ltd | Ponterwyd | Cardiganshire | 1878 | BT31 | 2450 | 12463 |
| South Caradon Mine Ltd | St Cleer | Cornwall | 1883 | BT286 | 18 | |
| South Caradon Mine Ltd | St Cleer | Cornwall | 1883 | BT286 | 551 | |
| South Cardigan Bay Lead Mining Co. Ltd | Tre Taliesin | Cardiganshire | 1870 | BT31 | 1543 | 4930 |
| South Condurrow Mine Ltd | Camborne | Cornwall | 1902 | BT31 | 10100 | 75643 |
| South Condurrow Mining Co. | Camborne | Cornwall | 1902 | BT31 | 10067 | 75320 |
| South Consols Copper Mining Co. Ltd | Cornwall | 1878 | BT286 | 464 | ||
| South Cornwall Mining Co. Ltd | Tywardreath | Cornwall | 1865 | BT286 | 109 | |
| South Cornwall Tin Mines Ltd | Cornwall | 1904 | BT31 | 10628 | 80433 | |
| South Cwmystwith Lead Mining Co. Ltd | Gwneos | Cardiganshire | 1875 | BT31 | 2132 | 9778 |
| South Darren Mining Co. Ltd | Goginan | Cardiganshire | 1860 | BT31 | 515 | 2054 |
| South Darren Mining Co. Ltd (No.2) | Goginan | Cardiganshire | 1876 | BT31 | 2205 | 10368 |
| South Darren Silver Lead Co. Ltd | Goginan | Cardiganshire | 1887 | BT31 | 3932 | 24904 |
| South De Eresby Mountain Lead Mining Co. Ltd | Bettws-y-Coed | Caernarvonshire | 1878 | BT31 | 2398 | 11971 |
| South Devon Iron & General Mining Co. Ltd | Devon | 1859 | BT31 | 397 | 1506 | |
| South Devon Iron & General Mining Co. Ltd | Devon | 1859 | BT41 | 641 | 3504 | |
| South Devon Mining & Quarrying Co. Ltd | Devon | 1867 | BT286 | 143 | ||
| South Devon United Copper Mines Ltd | Buckfastleigh | Devon | 1878 | BT286 | 458 | |
| South Europe Mining Co. Ltd | BT41 | 644 | 3520 | |||
| South Europe Mining Co. Ltd | 1858 | BT31 | 345 | 1243 | ||
| South Foxdale Silver Lead Mining Co | Foxdale | Isle of Man | 1862 | BT31 | 622 | 2604 |
| South Frances United Mines | Illogan | Cornwall | 1895 | BT31 | 6516 | 45849 |
| South Green Hurth & Nether Hurth Lead Mines Ltd | Forest & Frith | Durham | 1888 | BT31 | 4134 | 26646 |
| South Greenland Mining Co. Ltd | Greenland | 1862 | BT31 | 627 | 2633 | |
| South Grylls Mining Co. Ltd | St Hilary | Cornwall | 1863 | BT286 | 3 | |
| South Halkyn & Rhydymwyn Mining Co. Ltd | Halkyn | Flintshire | 1890 | BT31 | 31218 | 32185 |
| South Kit Hill Tin Mining Co. Ltd | Stoke Climsland | Cornwall | 1872 | BT286 | 255 | |
| South Levant Tin Mine Co. Ltd | Pendeen | Cornwall | 1873 | BT286 | 348 | |
| South Lisburne Silver Lead & Blende Mining Co. Ltd | Gwmma | Cardiganshire | 1871 | BT31 | 1632 | 5590 |
| South Llanfair Silver Lead Mining Co. Ltd | Carmarthenshire | 1882 | BT31 | 3014 | 17023 | |
| South Merllyn Mining Co. Ltd | Holywell | Flintshire | 1869 | BT31 | 1483 | 4544 |
| South Minera Lead Mining Co. Ltd | Esclusham Above | Denbighshire | 1861 | BT31 | 553 | 2250 |
| South Mining Co. Ltd | 1906 | BT31 | 11777 | 91351 | ||
| South Molton Silver Lead Mining Co. Ltd | South Molton | Devon | 1874 | BT286 | 368 | |
| South of Scotland Mining Co. Ltd | Newton Stewart | Kirkcudbrightshire | 1864-1881 | BT2 | 161 | |
| South Parys Copper Mining Co. Ltd | Amlwch | Anglesey | 1863 | BT31 | 819 | 631C |
| South Parys Copper Mining Co. Ltd | Amlwch | Anglesey | 1863 | BT31 | 737 | 227C |
| South Phoenix & Caradon Mine Ltd | Linkinhorne | Cornwall | 1883 | BT31 | 3198 | 18618 |
| South Plynlimon Mining Co. Ltd | Ponterwyd | Cardiganshire | 1870 | BT31 | 1515 | 4743 |
| South Polgooth Consols Ltd | St Ewe | Cornwall | 1881 | BT31 | 2796 | 15290 |
| South Polgooth Mining Corporation Ltd | St Ewe | Cornwall | 1916 | BT31 | 23460 | 145320 |
| South Prince Patrick Lead Mining Co. Ltd | Halkyn | Flintshire | 1873 | BT31 | 1899 | 7665 |
| South Prosper Mining Co. Ltd | Stoke Climsland | Cornwall | 1866 | BT286 | 129 | |
| South Redmoor Mining Co. Ltd | Stoke Climsland | Cornwall | 1870 | BT286 | 191 | |
| South Roman Gravels Co. Ltd | Shelve | Shropshire | 1883 | BT31 | 3210 | 18716 |
| South Roman Gravels Lead Mining Co. Ltd | Shelve | Shropshire | 1876 | BT31 | 2213 | 10426 |
| South Roman Gravels Mining Co. Ltd | Shelve | Shropshire | 1871 | BT31 | 1612 | 5449 |
| South Salop Mining Co. Ltd | Shropshire | 1867 | BT31 | 1367 | 3751 | |
| South Shropshire Barytes & Lead Co. Ltd | Shropshire | 1891 | BT31 | 5124 | 34564 | |
| South St Just Tin Mining Co. Ltd | St Just | Cornwall | 1870 | BT286 | 194 | |
| South Staffordshire Mining District Water Co | Staffordshire | BT41 | 646 | 3534 | ||
| South Swaledale Lead Mining Co. Ltd | Muker | Yorkshire | 1865 | BT31 | 1052 | 1834C |
| South Tawton Copper Mines Ltd | South Tawton | Devon | 1888 | BT31 | 4261 | 27633 |
| South Terras Tin Mining Co. Ltd | St Stephen in Brannel | Cornwall | 1872 | BT286 | 306 | |
| South Terras Tin Mining Co. Ltd | St Stephen in Brannel | Cornwall | 1888 | BT286 | 78 | |
| South Tigon Mining Co. Ltd | 1930 | BT31 | 35880 | 246096 | ||
| South Towan Consolidated Tin & Copper Mining Co. Ltd | Porth Towan | Cornwall | 1883 | BT286 | 549 | |
| South Towan Consolidated Tin & Copper Mining Co. Ltd | Porth Towan | Cornwall | 1883 | BT286 | 14 | |
| South Treburgett Silver Lead Mining Co. Ltd | Cornwall | 1874 | BT286 | 374 | ||
| South Trelawney Silver Lead Mining Co. Ltd | Cornwall | 1868 | BT286 | 170 | ||
| South Tresavean Mining Co. Ltd | Perranarworthal | Cornwall | 1859 | BT41 | 646 | 3536 |
| South Tresavean Mining Co. Ltd | Perranarworthal | Cornwall | 1859 | BT31 | 386 | 1442 |
| South Trevenna Tin & Copper Mining Co. Ltd | St Neot | Cornwall | 1865 | BT286 | 103 | |
| South Utah Mining Co. Ltd | Utah | U.S.A. | 1871 | BT31 | 1657 | 5807 |
| South Van Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | 1870 | BT31 | 1523 | 4795 |
| South Wales Consolidated Lead Mining Co. Ltd | Llangadock | Carmarthenshire | 1865 | BT31 | 1076 | 1981C |
| South Wales Refractories Ltd | 1935 | BT31 | 33586 | 299054 | ||
| South Wales Smelting Co. Ltd | 1884 | BT31 | 3366 | 20066 | ||
| South Wendron Tin Mining Co. Ltd | Wendron | Cornwall | 1875 | BT286 | 402 | |
| South West Cornwall Mines Ltd | Cornwall | 1906 | BT31 | 11584 | 89426 | |
| South West of Ireland Mining Co. Ltd | Ireland | 1857 | BT41 | 648 | 3544 | |
| South West of Ireland Mining Co. Ltd | Ireland | 1857 | BT31 | 242 | 787 | |
| South West Randt Mines Ltd | 1894 | BT31 | 6031 | 42625 | ||
| South Wheal Crebor Ltd | Tavistock | Devon | 1879 | BT31 | 2564 | 13386 |
| South Wheal Crofty | Illogan | Cornwall | 1906 | BT31 | 11538 | 88960 |
| South-East Wynaad Estates & Cold Mining Co. Ltd | India | 1880 | BT31 | 2603 | 13723 | |
| Southern & Western Mining Co of Ireland | Co. Cork | Ireland | 1845 | BT41 | 643 | 3515 |
| Southern Banket Prospecting Syndicate Ltd | 1894 | BT31 | 5879 | 41287 | ||
| Southern Colombia Prospecting Syndicate Ltd | 1924 | BT31 | 28436 | 196865 | ||
| Southern Ohio Prospecting Syndicate Ltd | 1892 | BT31 | 5400 | 37194 | ||
| Southern Siamese Tin Dredging Ltd | Siam | 1933 | BT31 | 35576 | 275208 | |
| Southern Tin Syndicate Ltd | Cornwall | 1907 | BT31 | 11814 | 91718 | |
| South-West of Ireland Mining Co. Ltd | Ireland | 1857 | BT31 | 242 | 787 | |
| South-Western Mining Syndicate Ltd | 1918 | BT31 | 24021 | 150151 | ||
| Spanish Corporation Ltd | Spain | 1890 | BT31 | 4827 | 32007 | |
| Spanish King Mining Co. Ltd | 1912 | BT31 | 20436 | 119912 | ||
| Spanish Mines Concession Co. Ltd | 1890-1894 | BT2 | 1953 | |||
| Spanish Mines Exploration Syndicate Ltd | 1887 | BT31 | 3925 | 24841 | ||
| Spanish Mines General Syndicate Ltd | 1900 | BT31 | 9121 | 67543 | ||
| Spanish Prospecting Co. Ltd | 1901 | BT31 | 16642 | 70192 | ||
| Spanish Prospecting Syndicate Ltd | 1890 | BT31 | 4778 | 31614 | ||
| Spanish Zinc Co. Ltd | Spain | 1872 | BT31 | 1730 | 6357 | |
| Spessart & Nogelsberg Mining Co. Ltd | BT41 | 651 | 3554 | |||
| Spitzbergen Mining & Exploration Syndicate Ltd | 1906 | BT31 | 11526 | 88833 | ||
| Spreacombe Vale Mine Ltd | Barnstaple | Devon | 1888 | BT31 | 4080 | 26136 |
| Spring Creek Copper Mining Co. Ltd | South Australia | Australia | 1862 | BT31 | 662 | 2796 |
| Squirrel Valley Copper Mine Ltd | 1909 | BT31 | 19057 | 105641 | ||
| St Agnes Consolidated Mines Ltd | St Agnes | Cornwall | 1909 | BT31 | 19155 | 106679 |
| St Agnes Consols Mining Co. Ltd | St Agnes | Cornwall | 1872 | BT286 | 256 | |
| St Asaph Zinc Lead & Baryta Co. Ltd | St Asaph | Flintshire | 1890 | BT31 | 31203 | 31339 |
| St Augustine Mine Ltd | 1891 | BT31 | 5195 | 35159 | ||
| St Augustine’s Diamond Mines Ltd | 1885 | BT31 | 3451 | 20866 | ||
| St Austell & Roche Mines Ltd | St Austell | Cornwall | 1872 | BT286 | 265 | |
| St Blazey Consols Tin Mine Ltd | St Blazey | Cornwall | 1871 | BT286 | 248 | |
| St Breward Consols Copper Mining Co. Ltd | St Breward | Cornwall | 1872 | BT286 | 311 | |
| St Breward Great Onslow Consols Mining Co. Ltd | St Breward | Cornwall | 1874 | BT286 | 386 | |
| St Breward Syndicate Ltd | St Breward | Cornwall | 1908 | BT31 | 18538 | 99415 |
| St Davids Lead Mining Co. Ltd | Whitford | Flintshire | 1874 | BT31 | 2043 | 8910 |
| St Dennis Consolidated Mining Co. Ltd | St Dennis | Cornwall | 1874 | BT286 | 393 | |
| St Dennis Consols Mining Co. Ltd | St Dennis | Cornwall | BT41 | 655 | 3578 | |
| St Dennis Consols Mining Co. Ltd | St Dennis | Cornwall | 1860 | BT31 | 466 | 1805 |
| St Dennis Mining Co. Ltd | St Dennis | Cornwall | 1902 | BT31 | 10051 | 75182 |
| St Georges Arrow Mine Ltd | 1895 | BT31 | 6475 | 45621 | ||
| St Goran Mines Co. Ltd | 1896-1904 | BT2 | 3195 | |||
| St Harmon Lead Mining Co. Ltd | Montgomeryshire | 1876 | BT31 | 2232 | 10580 | |
| St Helens Prospecting Syndicate Ltd | 1899 | BT31 | 8616 | 62805 | ||
| St Helens Smelting & Sulphate of Copper Co. Ltd | 1890 | BT31 | 4701 | 30976 | ||
| St Helens Smelting Co. Ltd | 1900 | BT31 | 8909 | 65629 | ||
| St Helen’s Smelting Co. Ltd | 1862 | BT31 | 650 | 2738 | ||
| St Ives Consolidated Ltd | St Ives | Cornwall | 1908 | BT31 | 18468 | 98495 |
| St John Del Rey Mining Co. Ltd | BT41 | 658 | 3596 | |||
| St John Delrey Mining Co. Ltd | Brazil | 1858 | BT31 | 334 | 1187 | |
| St John’s United Copper & Lead Mining Co Newfoundland Ltd | Newfoundland | Canada | BT41 | 613 | 3356 | |
| St John’s United Copper & Lead Mining Co Newfoundland Ltd | Newfoundland | Canada | 1859 | BT31 | 434 | 1672 |
| St Josephsberg Copper & Lead Mining Co. Ltd | 1869 | BT31 | 1480 | 4523 | ||
| St Just Amalgamated Mining Co. Ltd | St Just | Cornwall | 1865 | BT286 | 79 | |
| St Just Consols Mining Co. Ltd | St Just | Cornwall | 1863 | BT286 | 7 | |
| St Just Syndicate Ltd | St Just | Cornwall | 1907 | BT31 | 11905 | 92707 |
| St Just United Tin & Copper Mining Co. Ltd | St Just | Cornwall | 1861 | BT31 | 597 | 2494 |
| St Kew Prospecting Syndicate Ltd | 1894 | BT31 | 5881 | 41299 | ||
| St Lawrence Victoria & Valentine Amalgamated Mining Co. Ltd | Brynford | Flintshire | 1872 | BT31 | 1679 | 5970 |
| St Mary’s East Kootenay Copper Mines Ltd | 1899 | BT31 | 8363 | 60769 | ||
| St Maurice Mining Co. Ltd | France | 1863 | BT31 | 748 | 272C | |
| St Neots Mining Syndicate Ltd | St Neot | Cornwall | 1907 | BT31 | 12034 | 94028 |
| St Patrick Lead Mine Ltd | Flintshire | 1875 | BT31 | 2054 | 9033 | |
| St Stephen’s Haematite Iron Ore Mining Co. Ltd | 1872 | BT286 | 309 | |||
| St Stephen’s Tin & Copper Mining Co. Ltd | St Stephen in Brannel | Cornwall | 1873 | BT286 | 332 | |
| St Winifred Lead Mining Co. Ltd | Wales | 1875 | BT31 | 2137 | 9834 | |
| Stainton Moor Lead Mining Co. Ltd | Stainton | Yorkshire | 1880 | BT31 | 2637 | 13990 |
| Standard Lead Mine Ltd | Llanrwst | Caernarvonshire | 1884 | BT31 | 3321 | 19695 |
| Standard Mining & General Trust Ltd | 1911 | BT31 | 13665 | 117055 | ||
| Stang & Cleasby Lead Mines Ltd | Arkengarthdale | Yorkshire | 1907 | BT31 | 12161 | 95419 |
| Stanghow Mining & Iron Co. Ltd | Guisborough | Yorkshire | 1875 | BT31 | 2109 | 9557 |
| Stannaries Co. Ltd | Cornwall | 1888 | BT31 | 4032 | 25707 | |
| Stannaries Mining & Smelting Co. Ltd | Cornwall | 1914 | BT286 | 159 | ||
| Stannaries Syndicate Ltd | Cornwall | 1906 | BT31 | 11558 | 89150 | |
| Star of Mexico Mining Syndicate Ltd | Mexico | 1911 | BT31 | 13570 | 115142 | |
| Star of Nevada Silver Mining Co. Ltd | Nevada | U.S.A. | 1871 | BT31 | 1632 | 5589 |
| Star Smelting Co. Ltd | 1906 | BT31 | 11700 | 90586 | ||
| Staveley Lead Mining Co. Ltd | Staveley | Westmorland | 1871 | BT31 | 1602 | 5377 |
| Stayton Quicksilver Mining Co. Ltd | 1875 | BT31 | 2159 | 10028 | ||
| Steamship ‘Nyassa’ Co. Ltd | 1889 | BT2 | 1861 | |||
| Steddfa Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1878 | BT31 | 2464 | 12597 |
| Steeperton Mining Co. Ltd | Belstone | Devon | 1876 | BT286 | 441 | |
| Stiperstones Consols Ltd | Shelve | Shropshire | 1873 | BT31 | 1842 | 7205 |
| Stiperstones Mining Co. Ltd | Shelve | Shropshire | 1865 | BT31 | 1046 | 1811C |
| Stonecroft & Greyside Lead Mines Ltd | Fourstones | Durham | 1897 | BT31 | 7300 | 51661 |
| Stonecroft & Greyside Mining Co. Ltd | Fourstones | Durham | 1883 | BT31 | 3120 | 17946 |
| Stoney Way Mining Co. Ltd | MN | 1857 | BT41 | 661 | 3609 | |
| Storm Downs Mining Co. Ltd | Ashburton | Devon | 1895-1900 | BT2 | 2884 | |
| Stow Crag Mining Co. Ltd | Alston with Garrigill | Cumberland | 1876 | BT31 | 2221 | 10489 |
| Stragdale Mining Co. Ltd | MN | 1857 | BT41 | 662 | 3618 | |
| Straits Prospecting Syndicate Ltd | Malaya | 1888 | BT31 | 4164 | 26897 | |
| Strathalbyn Mining & Smelting Co. Ltd | Australia | 1857 | BT31 | 233 | 745 | |
| Strathalbyn Mining & Smelting Co. Ltd | Australia | BT41 | 663 | 3621 | ||
| Streatham Prospecting Syndicate Ltd | 1894 | BT31 | 5923 | 41671 | ||
| Stura Valley Mining & Smelting Co. Ltd | Italy | 1873 | BT31 | 1846 | 7238 | |
| Styria Mines Ltd | 1891 | BT31 | 5066 | 34057 | ||
| Success: Rushy Cliff & Nancy Consols Lead Mining Co. Ltd | Tissington | Derbyshire | 1872 | BT31 | 1795 | 6836 |
| Sucre Mine Ltd | 1882 | BT31 | 30981 | 17412 | ||
| Sudan Mines Ltd | 1904 | BT31 | 10897 | 82709 | ||
| Sue River Copper & General Mining Co. of Jamaica | BT41 | 664 | 3631 | |||
| Sugarloaf, Mount Morgan Mining Co. Ltd | 1906 | BT31 | 11680 | 90380 | ||
| Sulphur & Copper Co of Andalusia Ltd | Spain | 1865 | BT31 | 1126 | 2272C | |
| Sultana Mine of Canada Ltd | 1899 | BT31 | 8644 | 63025 | ||
| Sumatra Minerals Syndicate Ltd | 1906 | BT31 | 11462 | 88180 | ||
| Sumatra Mining Exploration Ltd | 1922 | BT31 | 27585 | 185856 | ||
| Sumatra Prospecting Syndicate Ltd | 1889 | BT31 | 4505 | 29435 | ||
| Sumburgh Mining Co. Ltd | Shetland | 1879 | BT31 | 2550 | 13269 | |
| Sungie Salak Prospecting Syndicate Ltd | 1899 | BT31 | 8664 | 63206 | ||
| Sunny Corner & Poldory Mine Syndicate Ltd | St Day | Cornwall | 1909 | BT31 | 12826 | 103700 |
| Sunnyside Lead Mining Co. Ltd | Frosterley | Durham | 1875 | BT31 | 2163 | 10071 |
| Sunside & Merryfield Lead Mining Co. Ltd | Bewerley | Yorkshire | 1872 | BT31 | 1695 | 6081 |
| Swaledale & Wensleydale Banking Co. Ltd Vols 1 & 2 | Richmond | Yorkshire | 1881 | BT31 | 36776 | 15670 |
| Swaledale Haulage Co. Ltd | Fremington | Yorkshire | 1905 | BT31 | 11108 | 84618 |
| Swaledale Lead Mines Ltd | Melbecks | Yorkshire | 1925 | BT31 | 29263 | 208847 |
| Swaledale Lead Mines Ltd | Reeth | Yorkshire | 1925 | BT31 | 29263 | 208847 |
| Swaledale Mining Association Ltd | Marrick | Yorkshire | 1887 | BT31 | 3957 | 25100 |
| Swan & Harrison Smelting Co. Ltd | 1893 | BT31 | 5681 | 39679 | ||
| Swanpool Mining Co. Ltd | Budock | Cornwall | 1859 | BT31 | 404 | 1546 |
| Swanpool Mining Co. Ltd | Budock | Cornwall | BT41 | 671 | 3660 | |
| Swansea Smelting & Silver Mining Co. Ltd | Colorado | U.S.A. | 1871 | BT31 | 1616 | 5483 |
| Swansea Smelting Co. Ltd | 1887 | BT31 | 3935 | 24926 | ||
| Swedish Mining & General Development Syndicate Ltd | 1907 | BT31 | 11995 | 93606 | ||
| Swincombe Vale Mining Co. Ltd | Lydford | Devon | 1864 | BT286 | 55 | |
| Sydney Godolphin Tin Mine Ltd | Breage | Cornwall | 1888 | BT31 | 4164 | 26900 |
| Syndicate Franco-Anglais Des Mines D’or Ltd | 1895 | BT31 | 6291 | 44534 |
