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Company Name |
Location |
Area |
Year |
Class |
Box No |
Company No |
| Eaglebrook Mining Co. Ltd * | Ponterwyd | Cardiganshire | 1863 | BT31 | 747 | 264C |
| Eagle-Vulture Mines Ltd | 1899 | BT31 | 8375 | 60869 | ||
| Earl Fitzwilliam’s Colleries Co. Ltd | Hemsworth | Yorkshire | 1933 | BT31 | 39550 | 272818 |
| Earl Fitzwilliam’s Royalties Company | Hemsworth | Yorkshire | 1933 | BT31 | 35576 | 275110 |
| East Africa Mining Areas Ltd | 1934 | BT31 | 33559 | 294353 | ||
| East Alderley Edge Mine Ltd | Alderley | Cheshire | 1865 | BT31 | 1123 | 2253C |
| East Arevalo (Mexican) Mining Co. Ltd | Mexico | 1886 | BT31 | 3694 | 22974 | |
| East Ashburton United Tin & Copper Mining Co. Ltd | Ilsington | Devon | 1858 | BT31 | 350 | 1272 |
| East Ashburton United Tin & Copper Mining Co. Ltd | Ilsington | Devon | BT41 | 206 | 1167 | |
| East Balleswidden Tin Mine Co. Ltd | St Just | Cornwall | 1872 | BT286 | 287 | |
| East Balleswidden Tin Mine Co. Ltd | St Just | Cornwall | 1872 | BT286 | 274 | |
| East Beam Co. Ltd | Roche | Cornwall | 1861 | BT31 | 570 | 2345 |
| East Birch Tor Tin Mining Co | North Bovey | Devon | 1850 | BT41 | 206 | 1168 |
| East Black Craig Mining Co. Ltd | Newton Stewart | Kirkcudbrightshire | 1869 | BT31 | 1477 | 4505 |
| East Boscaswell Tin Mining Co. Ltd | St Just | Cornwall | 1871 | BT286 | 242 | |
| East Botallack Consolidated Mining Co. Ltd | St Just | Cornwall | 1863 | BT286 | 25 | |
| East Botallack Tin Mine Co. Ltd | St Just | Cornwall | 1873 | BT286 | 330 | |
| East Bottle Hill Mining Co. Ltd | Plympton St Mary | Devon | 1871 | BT286 | 234 | |
| East Broken Hill Consols Ltd | New South Wales | Australia | 1891 | BT31 | 5037 | 33800 |
| East Bronfloyd Silver Lead Mining | Penrhyncock | Cardiganshire | 1862 | BT31 | 644 | 2701 |
| East Cheshire Mining Co. Ltd | Cheshire | 1908 | BT31 | 18496 | 98914 | |
| East Clifford Mining Co. Ltd | Gwennap | Cornwall | 1866 | BT286 | 127 | |
| East Combe Silver & Lead Mining Co | Ilfracombe | Devon | 1847 | BT41 | 207 | 1172 |
| East Cornwall Consols Ltd | Cornwall | 1889 | BT31 | 4640 | 30485 | |
| East Cornwall Mining & Smelting Co. Ltd | Cornwall | 1917 | BT31 | 23743 | 147827 | |
| East Cornwall St Vincent Mining Co. Ltd | Callington | Cornwall | 1871 | BT286 | 236 | |
| East Cornwall Tin Mining Syndicate Ltd | Cornwall | 1894 | BT31 | 6046 | 42741 | |
| East Craven Moor Lead Co. Ltd | Appletreewick | Yorkshire | 1877 | BT31 | 2334 | 11381 |
| East Crowndale Mining Co. Ltd | Whitchurch | Devon | 1880 | BT286 | 509 | |
| East Cwm Vron Lead Mining Co. Ltd | Montgomeryshire | 1871 | BT31 | 1641 | 5657 | |
| East Darren Mines Co. Ltd | Cwmsymlog | Cardiganshire | 1858 | BT31 | 344 | 1239 |
| East Darren Mines Co. Ltd | Cwmsymlog | Cardiganshire | BT41 | 207 | 1175 | |
| East Darren Mining Co. Ltd | Cwmsymlog | Cardiganshire | 1895 | BT31 | 6145 | 43534 |
| East Dartmoor Tin & Copper Mining Co. Ltd | Devon | 1874 | BT286 | 371 | ||
| East Del Rey Mining Co. Ltd | Brazil | 1861 | BT31 | 585 | 2429 | |
| East Devon Consols Copper Mine Ltd | Buckfastleigh | Devon | 1880 | BT286 | 492 | |
| East Dolwen Co. Ltd | Devil’s Bridge | Cardiganshire | 1871 | BT31 | 1596 | 5323 |
| East Dyliffe Lead & Copper Mining | Llanbrynmair | Montgomeryshire | 1862 | BT31 | 678 | 2885 |
| East Elwy River Lead Mining Co. Ltd | Abergele | Denbighshire | 1876 | BT31 | 2182 | 10208 |
| East Eureka Mining Co. Ltd | 1870 | BT31 | 1567 | 5105 | ||
| East Florida Silver Lead Mining Co. Ltd | Cardiganshire | 1879 | BT31 | 2559 | 13342 | |
| East Fowey Consols Co. Ltd | Lanlivery | Cornwall | 1861 | BT31 | 560 | 2291 |
| East Foxdale Silver Lead Mining Co. Ltd | Foxdale | Isle of Man | 1872 | BT31 | 1672 | 5921 |
| East Frongoch Lead Mining Co. Ltd | Devil’s Bridge | Cardiganshire | 1858 | BT31 | 329 | 1167 |
| East Frongoch Lead Mining Co. Ltd | Devil’s Bridge | Cardiganshire | BT41 | 209 | 1182 | |
| East Goginan Lead Mining Co. Ltd | Goginan | Cardiganshire | 1876 | BT31 | 2264 | 10831 |
| East Goginan Mine Ltd | Wales | 1909 | BT31 | 12752 | 102639 | |
| East Grassington Mines Ltd | Appletreewick | Yorkshire | 1887 | BT31 | 3891 | 24580 |
| East Great Work Mining Co. Ltd | Breage | Cornwall | 1863 | BT286 | 15 | |
| East Hendre Lead Mining Co. Ltd | Halkyn | Flintshire | 1873 | BT31 | 1817 | 7015 |
| East Herodsfoot Silver Lead Mine Ltd | Duloe | Cornwall | 1881 | BT286 | 535 | |
| East Hony Mining Co. Ltd | Menheniot | Cornwall | 1882 | BT31 | 2925 | 16315 |
| East India Company for Exploration & Mining Ltd | 1881-1896 | BT2 | 1074 | |||
| East Killifreth Tin Mine Syndicate Ltd | Kenwyn | Cornwall | 1883 | BT31 | 3219 | 18791 |
| East Kongsberg Native Silver Mining Co of Norway Ltd | Norway | 1859 | BT31 | 413 | 1592 | |
| East Kongsberg Native Silver Mining Co. of Norway Ltd | Norway | BT41 | 210 | 1195 | ||
| East Laxey Mining Co. Ltd | Maughold | Isle of Man | 1864 | BT31 | 993 | 1514C |
| East Llangynog Lead Mining Co. Ltd | Llanrhaeadr | Montgomeryshire | 1870 | BT31 | 1583 | 5214 |
| East Llwyn Teify Mining Co. Ltd | Ponterwyd | Cardiganshire | 1872 | BT31 | 1743 | 6446 |
| East Long Rake Lead Mining Co. Ltd | Halkyn | Flintshire | 1880 | BT31 | 2715 | 14641 |
| East Longstone Silver Lead Mine Co. Ltd | Cornwall | 1879 | BT286 | 476 | ||
| East Maes y Safn Lead Mining Co. Ltd | Llanferres | Denbighshire | 1864 | BT31 | 1037 | 1757C |
| East Mona Mining Co. Ltd | Amlwch | Anglesey | 1860 | BT31 | 513 | 2048 |
| East Mulberry Tin Mining Co. Ltd | Lanivet | Cornwall | 1872 | BT286 | 302 | |
| East Muzo Mines Ltd | 1902 | BT31 | 10028 | 75001 | ||
| East Nant y Mwyn Lead Mining Co. Ltd | Llanwrtyd | Breconshire | 1872 | BT31 | 1723 | 6303 |
| East of Cornwall Consolidated Mines Co. | Lanivet | Cornwall | 1857 | BT41 | 207 | 1173 |
| East of Cornwall Consolidated Mines Co. Ltd | Lanivet | Cornwall | 1857 | BT31 | 267 | 897 |
| East Pant Du Lead Mining Co. Ltd | Mold | Flintshire | 1878 | BT31 | 2441 | 12381 |
| East Pant Du Lead Mining Co. Ltd | Mold | Flintshire | 1879 | BT31 | 2559 | 13343 |
| East Pant Du United Lead Mining Co. Ltd | Mold | Flintshire | 1863 | BT31 | 817 | 623C |
| East Parys Mining Co. Ltd | Amlwch | Anglesey | BT41 | 212 | 1199 | |
| East Parys Mining Co. Ltd | Amlwch | Anglesey | 1858 | BT31 | 333 | 1191 |
| East Peevor Tin & Copper Mining Co. Ltd | Scorrier | Cornwall | 1880 | BT286 | 490 | |
| East Phoenix & Dunsley Tin Mines Ltd | Linkinhorne | Cornwall | 1888 | BT31 | 4084 | 26177 |
| East Plynlimmon Lead Mining Co. Ltd | Montgomeryshire | 1868 | BT31 | 1438 | 4237 | |
| East Polberro Tin Mining Co. Ltd | St Agnes | Cornwall | 1872 | BT286 | 313 | |
| East Polberro Tin Mining Co. Ltd | St Agnes | Cornwall | 1862 | BT31 | 607 | 2547 |
| East Pool & Agar Ltd | Illogan | Cornwall | 1913 | BT31 | 35100 | 126458 |
| East Rhosesmor Mining Co. Ltd | Halkyn | Flintshire | 1863 | BT31 | 845 | 762C |
| East Rhydtalog Mining Co. Ltd | Doethie Camddwr | Cardiganshire | 1871 | BT31 | 1610 | 5429 |
| East Roman Gravels Lead Mining Co. Ltd | Minsterley | Shropshire | 1879 | BT31 | 2509 | 12957 |
| East Royalton Tin Mining Co. Ltd | Roche | Cornwall | 1868 | BT286 | 171 | |
| East Sheba Reef Mining Co. Ltd | South Africa | 1890 | BT31 | 15117 | 32912 | |
| East Sheboygan Silver Mining Co. Ltd | 1871 | BT31 | 1606 | 5404 | ||
| East Siberian Prospecting Association Ltd | 1903 | BT31 | 10327 | 77668 | ||
| East Snaefell Mining Co. Ltd | Lonan | Isle of Man | 1864 | BT31 | 1028 | 1709C |
| East Terras Tin Mining Co. Ltd | St Stephen in Brannel | Cornwall | 1871 | BT286 | 212 | |
| East Treburgett Mines Ltd | St Teath | Cornwall | 1883 | BT31 | 3233 | 18935 |
| East Treveddoe Tin Mine Co. Ltd | Warleggan | Cornwall | 1870 | BT286 | 199 | |
| East Tywarnhaile Mining Co. Ltd | St Agnes | Cornwall | 1864 | BT286 | 47 | |
| East Van Mining Co. Ltd | Llanidloes | Montgomeryshire | 1871 | BT31 | 1616 | 5482 |
| East Vitifer Tin Mining Co. Ltd | North Bovey | Devon | 1891 | BT286 | 204 | |
| East Vitifer Tin Mining Co. Ltd | North Bovey | Devon | 1870 | BT286 | 203 | |
| East Vitifer Tin Mining Co. Ltd | North Bovey | Devon | 1888 | BT286 | 118 | |
| East Westminster Mining Co. Ltd | Llanarmon | Denbighshire | 1864 | BT31 | 1024 | 1678C |
| East Wheal Martha Mining Co. Ltd | Lamerton | Devon | 1861 | BT31 | 575 | 2376 |
| East Wheal Rose Consolidated Silver Lead Mining Co. Ltd | St Erne | Cornwall | 1866 | BT286 | 135 | |
| East Wheal Rose Ltd | Newlyn East | Cornwall | 1881 | BT286 | 527 | |
| East Wheal Shepherds & Rose United Silver Lead Mining Co. Ltd | Newlyn East | Cornwall | 1872 | BT286 | 266 | |
| East Wheal Vor Tin Mining Co. Ltd | Sithney | Cornwall | 1880 | BT286 | 516 | |
| East Ziervogel Ltd | 1889 | BT31 | 4586 | 30047 | ||
| Eastaugh Mining Syndicate Ltd | 1907 | BT31 | 11789 | 91499 | ||
| Eastern Estate & Mining Co. Ltd | 1878 | BT31 | 2442 | 12393 | ||
| Eastern Mining Co. Ltd | 1910 | BT31 | 32079 | 112538 | ||
| Eberhardt & Aurora Mining Co. Ltd | 1870 | BT31 | 1518 | 4757 | ||
| Ebury Lead Mining Co. Ltd | Halkyn | Flintshire | 1867 | BT31 | 1363 | 3723 |
| Ecton Co. Ltd | Wetton | Staffordshire | 1883 | BT31 | 3204 | 18659 |
| Ecton Consolidated Mining Co. Ltd | Alton | Staffordshire | 1858 | BT31 | 350 | 1273 |
| Ecton Consolidated Mining Co. Ltd | Ecton | Staffordshire | BT41 | 215 | 1223 | |
| Ecton Mountain Mining Co | Ecton | Staffordshire | BT41 | 215 | 1224 | |
| Ecuador Mining & Development Corporation Ltd | Ecuador | 1912 | BT31 | 13900 | 122159 | |
| Edith Mining Co. Ltd | 1912 | BT31 | 20812 | 123277 | ||
| Edmundian Copper Mining Co. Ltd | 1907 | BT31 | 12078 | 94503 | ||
| Edward Briggs & Co. Ltd | 1899 | BT31 | 8397 | 61066 | ||
| Edward Greaves Mining Appliances Ltd | 1912 | BT31 | 20481 | 120341 | ||
| Edwin Briggs Ltd | 1910 | BT31 | 19648 | 111711 | ||
| Effuenta (Wassaw) Mines Ltd | 1901 | BT31 | 9336 | 69366 | ||
| Egmont Mining Co. Ltd | 1911 | BT31 | 13724 | 118073 | ||
| Egremont Mining Co. Ltd | Egremont | Cumberland | 1910 | BT31 | 32078 | 112019 |
| Egwira Mines Ltd | 1882 | BT31 | 3009 | 16984 | ||
| Egyptian Mines Exploration Co. Ltd | Egypt | 1900 | BT31 | 9031 | 66812 | |
| Eifel Mines Ltd | 1905 | BT31 | 10966 | 83302 | ||
| Einasleigh Freehold Copper Mines Ltd | 1899 | BT31 | 8456 | 61541 | ||
| El Amparo Mine Ltd | 1913 | BT31 | 21509 | 129419 | ||
| El Burcio Silver Lead Mines Ltd | 1912 | BT31 | 20415 | 119701 | ||
| El Gallo Mines Ltd | 1887 | BT31 | 3983 | 25319 | ||
| El-Chico Silver Mining & Reduction Co. Ltd | Mexico | 1863 | BT31 | 871 | 879C | |
| Electric Smelting Co. Ltd | 1909 | BT31 | 19035 | 105361 | ||
| Electro Smelting Co. Ltd | 1898 | BT31 | 8189 | 59252 | ||
| Elgar Silver Lead Mining Co. Ltd | Bow Street | Cardiganshire | 1873 | BT31 | 1882 | 7504 |
| Elias Mines Co. Ltd | 1898 | BT31 | 7819 | 55953 | ||
| Elizabeth Mining Co. Ltd | Wales | 1888 | BT31 | 4206 | 27217 | |
| Elizabeth Tin Mine Ltd | Cornwall | 1886 | BT31 | 3679 | 22838 | |
| Elkhorn Mining Co. Ltd | Montana | U.S.A. | 1890 | BT31 | 4674 | 30756 |
| Ellen United Copper & Zinc Mining Co. Ltd | St Agnes | Cornwall | 1867 | BT286 | 149 | |
| Elliscales Mines & Quarries Syndicate Ltd | Dalton | Lancashire | 1910 | BT31 | 13345 | 111180 |
| Elliscales Mining Co. Ltd | Dalton | Lancashire | 1883 | BT31 | 3223 | 18834 |
| Elnor & Briggs Ltd | 1908 | BT31 | 12331 | 97333 | ||
| Emerald Land & Mines Trust Co. Ltd | South Africa | 1888 | BT31 | 4297 | 27891 | |
| Emerald Mines of Columbia Ltd | Columbia | 1888 | BT31 | 4104 | 26344 | |
| Emerald Mining & Prospecting Co. Ltd | 1887 | BT31 | 3932 | 24898 | ||
| Emily Copper Mines Ltd | Sticklepath | Devon | 1882 | BT31 | 3030 | 17152 |
| Emily Edith Mines Ltd | 1900 | BT31 | 8967 | 66195 | ||
| Emma Silver Mining Co. Ltd | U.S.A. | 1871 | BT31 | 1658 | 5809 | |
| Emperatrix Lead Mines Development Syndicate Ltd | 1908 | BT31 | 12527 | 99741 | ||
| Empire Mines of British Columbia Ltd | 1899 | BT31 | 8506 | 61917 | ||
| Empire Mining Co. Ltd | Montana | U.S.A. | 1886 | BT31 | 3635 | 22430 |
| Empire Mining Exploration & Trading Co. Ltd | 1900 | BT31 | 9024 | 66768 | ||
| Empress (Rhodesia) Mines Ltd | 1899 | BT31 | 8442 | 61441 | ||
| Empress Ltd | Nevada | U.S.A. | 1886 | BT31 | 3704 | 23040 |
| Empress Mines Ltd | 1888 | BT31 | 4135 | 26664 | ||
| Encinillas Mines & Smelting Works of Santa Rosalia Ltd | 1907 | BT31 | 18142 | 94004 | ||
| Engineering & Mining Stores Ltd | 1924 | BT31 | 28458 | 197153 | ||
| English & Australian Copper Co. Ltd | Australia | 1865 | BT31 | 14379 | 2921 | |
| English & Canadian Mining Co. Ltd | 1858 | BT31 | 350 | 1268 | ||
| English & Canadian Mining Co. Ltd | BT41 | 224 | 1262 | |||
| English & Spanish Mining Syndicate Ltd | 1911 | BT31 | 13644 | 116506 | ||
| English Antimony Co. Ltd | Cornwall | 1889 | BT31 | 4481 | 29258 | |
| English Arsenic Co. Ltd | Roseworthy | Cornwall | 1924 | BT31 | 28336 | 195533 |
| English Barytes & Mining Co. Ltd | 1915 | BT31 | 22858 | 140523 | ||
| English Foreign & Colonial Mines Co. Ltd | World | 1871 | BT31 | 1631 | 5579 | |
| English Lead Co. Ltd | 1903 | BT31 | 10292 | 77308 | ||
| English Mining Syndicate Ltd | MN | 1894 | BT31 | 5915 | 41603 | |
| Enterprise District (Rhodesia) Mining Co. Ltd | 1910 | BT31 | 13377 | 111685 | ||
| Era Mining Properties Development Syndicate Ltd | 1910 | BT31 | 19544 | 110496 | ||
| Erglodd & Penpompren Silver Lead Mining Co. Ltd | Tal-y-bont | Cardiganshire | 1872 | BT31 | 1704 | 6145 |
| Erglodd United Mines Ltd | Tal-y-bont | Cardiganshire | 1883 | BT31 | 3126 | 18004 |
| Erins Copper Mining Co. Ltd | Ireland | 1861-1866 | BT2 | 87 | ||
| Erwfelin Lead Mining Co. Ltd | Mold | Flintshire | 1863 | BT31 | 784 | 451C |
| Escurial Copper & Mines Ltd | 1902 | BT31 | 9637 | 71617 | ||
| Esgair Fraith Copper Mining & Development Syndicate Ltd | Tal-y-bont | Cardiganshire | 1898 | BT31 | 8003 | 57550 |
| Esgair Hir Mining Co. Ltd | Tal-y-bont | Cardiganshire | 1871 | BT31 | 1618 | 5489 |
| Esgair Hir Mining Co. Ltd | Tal-y-bont | Cardiganshire | 1886 | BT31 | 3643 | 22497 |
| Esgair Lle Mine Co. Ltd | Ponterwyd | Cardiganshire | 1856 | BT31 | 3 | 21 |
| Esgair Lle Mine Co. Ltd | Ponterwyd | Cardiganshire | BT41 | 230 | 1294 | |
| Esgair Lle Silver Lead Mining Co. Ltd | Ponterwyd | Cardiganshire | 1870 | BT31 | 1541 | 4914 |
| Esgair Mwyn Mining Co | Ffair-Rhos | Cardiganshire | BT41 | 230 | 1293 | |
| Esgair Mwyn Mining Co * | Ystradmeurig | Cardiganshire | 1856 | BT31 | 163 | 492 |
| Esmeralda Emerald Mines Ltd | 1883 | BT31 | 3136 | 18080 | ||
| Espana Mining Co. | 1910 | BT31 | 19496 | 109859 | ||
| Espeland Silver Lead Mine Co. Ltd | 1891 | BT31 | 5008 | 33552 | ||
| Esperance Mines Supply Ltd | 1896 | BT31 | 6772 | 47660 | ||
| Esperanza Foreign Mine Prospecting Syndicate Co. Ltd | 1874 | BT31 | 2035 | 8842 | ||
| Esperanza Iron Mining Co. Ltd | 1878 | BT31 | 2423 | 12204 | ||
| Espie Bay Mines Development Syndicate Ltd | 1901 | BT31 | 9536 | 70853 | ||
| Espiel Antimony Mines Ltd | Espiel | Spain | 1907 | BT31 | 11990 | 93566 |
| Espinosena Silver Mining Co. Ltd | Mexico | 1871 | BT31 | 1653 | 5770 | |
| Estate Consols Co. Ltd | Devon | 1881 | BT31 | 2797 | 15306 | |
| Estate Finance & Mines Corporation Ltd | 1897 | BT31 | 7654 | 54630 | ||
| Eudon Lead Mining Co. Ltd | Hunstanworth | Durham | 1862 | BT31 | 637 | 2676 |
| Eureka (Nevada) Silver Mining Co. Ltd | Nevada | U.S.A. | 1880 | BT31 | 2699 | 14527 |
| Eureka Mining Co. Ltd | California | U.S.A. | 1870 | BT31 | 1506 | 4690 |
| European Mining Co. Ltd | 1908 | BT31 | 12383 | 97933 | ||
| Eva Iron Ore Mining Co. Ltd | 1872 | BT31 | 1749 | 6498 | ||
| Evangeline Mines Ltd | 1891 | BT31 | 5133 | 34638 | ||
| Evenoes Mining Syndicate Ltd | 1912 | BT31 | 13856 | 121062 | ||
| Evishacrow Hematite Ore Co. Ltd | Co. Antrim, Red Bay | Ireland | 1872 | BT31 | 1692 | 6060 |
| Evora Iron Mines Ltd | 1874 | BT31 | 2015 | 8711 | ||
| Excelsior Copper Co. Ltd | Quebec | Canada | 1888 | BT31 | 4239 | 27472 |
| Exford Iron Mine & Colour Co. Ltd | Exford | Somerset | 1859 | BT31 | 436 | 1682 |
| Exford Iron Mine & Colour Co. Ltd | Exford | Somerset | BT41 | 235 | 1328 | |
| Exmoor Mining Syndicate Ltd | Simonsbath | Somerset | 1912 | BT31 | 21102 | 125947 |
| Exploration & Mining Co. of New South Wales Ltd | 1881 | BT31 | 2849 | 15668 | ||
| Exploration & Mining Venture Syndicate Ltd | 1926 | BT31 | 32799 | 218586 | ||
| Eyre Smelting Co. Ltd | 1904 | BT31 | 10771 | 81663 | ||
| Fadw Mining Co. Ltd | St Harmon | Radnorshire | 1864 | BT31 | 1024 | 1682C |
| Falcon Cliff Mining Co. Ltd | Rushen | Isle of Man | 1868 | BT31 | 1398 | 3962 |
| Falcon Mining Co. Ltd | Egremont | Cumberland | 1883 | BT31 | 3207 | 18680 |
| Falmouth Consolidated Mines Ltd | Kea, Wheal Jane | Cornwall | 1907 | BT31 | 11854 | 92145 |
| Falmouth Smelting Co. Ltd | 1863 | BT31 | 818 | 625C | ||
| Fame & Fortune Mine Ltd | 1893 | BT31 | 5636 | 39286 | ||
| Fame & Fortune Mine Ltd | 1899 | BT31 | 8778 | 64288 | ||
| Fanti Consolidated Mines Ltd | 1900 | BT31 | 9151 | 67820 | ||
| Fanti Mines Ltd | 1901 | BT31 | 9452 | 70208 | ||
| Farrington Mines Ltd | Nevada | U.S.A. | 1886 | BT31 | 3608 | 22216 |
| Federated Mines of Rhodesia Ltd | 1902 | BT31 | 9772 | 72801 | ||
| Federated Mines Prospecting & Finance Co. Ltd | 1895 | BT31 | 6400 | 45193 | ||
| Federated Mining & Development Co (West Africa) Ltd | 1913 | BT31 | 14181 | 131720 | ||
| Fedw Lead Mining Co. Ltd | St Harmon | Radnorshire | 1869 | BT31 | 1460 | 4389 |
| Felix Lead Mining Co. Ltd | Llanfrothen | Merionethshire | 1877 | BT31 | 2375 | 11748 |
| Fell Valley Copper & Lead Mining Co. Ltd | Rhenish Prussia | Germany | BT41 | 237 | 1348 | |
| Fell Valley Copper & Lead Mining Co. Ltd | Rhenish Prussia | Germany | 1860 | BT31 | 470 | 1822 |
| Felton’s Copala Mines Ltd | 1903 | BT31 | 10414 | 78454 | ||
| Fenchurch Mining Development Ltd | 1936 | BT31 | 33660 | 314029 | ||
| Ferguson Sydicate Co. Ltd | 1888-1893 | BT2 | 1799 | |||
| Fernandez Mines Syndicate Ltd | 1894-1897 | BT2 | 2659 | |||
| Ferro Smelting Co. Ltd | 1915 | BT31 | 23012 | 141807 | ||
| Ferro-Manganese Co. Ltd | Devon | 1880 | BT31 | 2608 | 13763 | |
| Fetish Mines Ltd | 1902 | BT31 | 9565 | 71087 | ||
| Fifield Magnesite & Refractories Co. Ltd | 1915 | BT31 | 32205 | 140058 | ||
| Financial Mines & Industries Association Ltd | 1897 | BT31 | 7275 | 51464 | ||
| Finsbury Mines & Finance Ltd | 1900 | BT31 | 9268 | 68880 | ||
| Fitzroy Copper Mines Ltd | 1902 | BT31 | 9992 | 74629 | ||
| Flagstaff District Silver Mining Co. Ltd | Utah | U.S.A. | 1881 | BT31 | 2758 | 15012 |
| Flagstaff Mines Ltd | 1898 | BT31 | 8244 | 59805 | ||
| Flagstaff Mines Ltd | 1885 | BT31 | 3481 | 21123 | ||
| Flagstaff Silver Mining Co of Utah Ltd | Utah | U.S.A. | 1871 | BT31 | 1664 | 5861 |
| Flameless Explosive Co. Ltd | 1888 | BT31 | 4028 | 25673 | ||
| Flavilla Mining Co. Ltd | 1880 | BT31 | 2613 | 13810 | ||
| Flintshire Amalgamated Silver Lead Mines Ltd | Flintshire | 1881 | BT31 | 2832 | 15559 | |
| Flintshire Consolidated Lead Mining Co. Ltd | Flintshire | 1877 | BT31 | 2348 | 11493 | |
| Flintshire Great Consols Ltd | Holywell | Flintshire | 1879 | BT31 | 2589 | 13600 |
| Flintshire Lead Mining Co. Ltd | Mold | Flintshire | 1872 | BT31 | 1743 | 6450 |
| Flintshire Refractory Cements Ltd | Flintshire | 1936 | BT31 | 33676 | 319049 | |
| Flintshire Silver Lead Mines Ltd | Flintshire | 1908 | BT31 | 2348 | 97552 | |
| Florence & Tonkin Mining Co. Ltd | Callington | Cornwall | 1871 | BT286 | 224 | |
| Florence Mining & Exploration Co. Ltd | 1909 | BT31 | 12804 | 103390 | ||
| Florence Mining Co. Ltd | North Molton | Devon | 1871 | BT31 | 1637 | 5628 |
| Florence Tin Mine Co. Ltd | Devon | 1871 | BT286 | 227 | ||
| Florida Silver Lead Mining Co. Ltd | Pontryhdfendigaid | Cardiganshire | 1870 | BT31 | 1529 | 4833 |
| Force Cragg Lead & Barytes Mining Co. Ltd | Braithwaite | Cumberland | 1873 | BT31 | 1884 | 7524 |
| Foreign & Colonial Mining Fund Ltd | 1871 | BT31 | 1612 | 5448 | ||
| Foreign & Colonial Tunnelling & Prospecting Co. Ltd | 1874 | BT31 | 1952 | 8217 | ||
| Foreign Land & Mineral Rights Purchase Co. Ltd | 1864 | BT31 | 1025 | 1691C | ||
| Foreign Mines Exploration Co. Ltd | 1891 | BT31 | 5181 | 35024 | ||
| Foreign Mines Investment Trust Ltd | 1888 | BT31 | 4146 | 26753 | ||
| Foreign Mines Prospecting Syndicate Ltd | 1899 | BT31 | 8533 | 62111 | ||
| Foreign Mining Association Ltd | 1881 | BT31 | 2830 | 15550 | ||
| Forest Mining Syndicate Ltd | Teesdale | Durham | 1908 | BT31 | 12588 | 100533 |
| Forest of Dean Consolidated Iron Mining Co. Ltd | Gloucestershire | 1866 | BT31 | 1249 | 2993 | |
| Forest of Dean Mining Co. | Gloucestershire | BT41 | 243 | 1385 | ||
| Forster Mining & Smelting Co. Ltd | 1911 | BT31 | 20092 | 116467 | ||
| Forster Mining & Smelting Co. Ltd | 1911 | BT31 | 20092 | 116467 | ||
| Fort Bowen New Co. Ltd | Colombia | 1856 | BT31 | 214 | 659 | |
| Fortescue Tin Mining Co. Ltd | St Austell | Cornwall | 1871 | BT286 | 250 | |
| Fortuna Co. Ltd | Linares | Spain | 1856 | BT31 | 175 | 524 |
| Fortune Copper Mining Co of Western Australia Ltd | Western Australia | Australia | 1862 | BT31 | 654 | 2754 |
| Founders Prospecting & Agency Syndicate Ltd | 1889 | BT31 | 4398 | 28594 | ||
| Fountain & Burnley Ltd | Barnsley | Yorkshire | 1896 | BT31 | 42907 | 48150 |
| Foxdale Silica and Granite Quarries Ltd | Foxdale | Isle of Man | 1909 | BT31 | 12624 | 101024 |
| Foye Quarries (Carlingford) Syndicate Ltd | Ireland | 1903 | BT31 | 10188 | 76402 | |
| Fraddon Mining Syndicate Ltd | Fraddon | Cornwall | 1912 | BT31 | 20401 | 119592 |
| Franco Consols Tin & Copper Mining Co. Ltd | Horrabridge | Devon | 1871 | BT286 | 214 | |
| Franklin’s Rhodesian Mines Syndicate Ltd | Rhodesia | 1901 | BT31 | 9610 | 71420 | |
| Fred Shaw & Co. Ltd | Kirkburton | Yorkshire | 1906 | BT31 | 11727 | 90876 |
| Free State Mines Ltd | 1895 | BT31 | 6185 | 43819 | ||
| Fremantle Smelting Works Ltd | 1900 | BT31 | 8896 | 65496 | ||
| French Food Preserving & Mining Co. Ltd | 1912 | BT31 | 13793 | 119531 | ||
| French Guinea Mining Co. Ltd | 1906 | BT31 | 11751 | 91110 | ||
| French Mines Ltd | France | 1891 | BT31 | 4981 | 33306 | |
| French Mining Syndicate Ltd | 1906 | BT31 | 11581 | 89401 | ||
| French’s Mining, Milling & Extracting Co. Ltd | 1894-1909 | BT2 | 2713 | |||
| Friddllechwedd Lead Mining Co. Ltd | Flintshire | BT41 | 246 | 1400 | ||
| Friddllechwedd Lead Mining Co. Ltd | Flintshire | 1856 | BT31 | 211 | 651 | |
| Frizington Mining Co. Ltd | Frizington | Cumberland | 1884 | BT31 | 3404 | 20423 |
| Fron Hall & Fron Issa United Mining Co. Ltd | Gwernymynydd | Flintshire | 1868 | BT31 | 1407 | 4029 |
| Fron Hall United Lead Mining Co. Ltd | Gwernymynydd | Flintshire | 1875 | BT31 | 2147 | 9928 |
| Fron Lead Mining Co. Ltd | Holywell | Flintshire | 1863 | BT31 | 733 | 196C |
| Frongoch Mine Ltd | Devil’s Bridge | Cardiganshire | 1878 | BT31 | 2462 | 12579 |
| Frontenac Lead Mining & Smelting Co. Ltd | 1876 | BT31 | 2219 | 10470 | ||
| Frontenac Mining Co. Ltd | 1908 | BT31 | 12317 | 97167 | ||
| Fron-Vellan Lead Mining Co. Ltd | Machynlleth | Montgomeryshire | 1870 | BT31 | 1551 | 4985 |
| Frosterley Lead Mining Co. Ltd | Frosterley | Durham | 1878 | BT31 | 2460 | 12555 |
| Fuller’s Earth Mining Corporation Ltd | 1927 | BT31 | 29903 | 223196 | ||
| Fursdon Great Consolidated Copper Mining Co. Ltd | Okehampton | Devon | 1870 | BT286 | 198 | |
| Fursdon Mining Co. Ltd | South Zeal | Devon | 1865 | BT41 | 247 | 1403 |
| Fursdon Mining Co. Ltd | Okehampton | Devon | 1859 | BT31 | 425 | 1645 |
| Furze Hill Tin Mining Co. Ltd | Walkhampton | Devon | 1871 | BT286 | 223 | |
| G. & W. Halliday Ltd | Halifax | Yorkshire | 1904 | BT31 | 10698 | 81079 |
| G.F.K. Refractories Ltd | 1956 | BT31 | 39029 | 564651 | ||
| Galena Mines Ltd | 1896 | BT31 | 7154 | 50498 | ||
| Galicia Iron Mines Co. Ltd | 1875 | BT31 | 2094 | 9406 | ||
| Galician Oil Prospecting Co. Ltd | 1888 | BT31 | 4050 | 25870 | ||
| Gallicia (Spain) Mining Co. Ltd | 1887-1896 | BT2 | 1611 | |||
| Gallygill Syke & Bents Silver Lead Mining Co. Ltd | Alston with Garrigill | Cumberland | 1867 | BT31 | 1322 | 3443 |
| Galway Mining Co. Ltd | Ireland | 1871-1881 | BT2 | 380 | ||
| Gardinian Mining Co. Ltd | 1863 | BT31 | 828 | 673C | ||
| Garfield Ltd | Nevada | U.S.A. | 1886 | BT31 | 3641 | 22480 |
| Garlies Silver Lead Mining Co. Ltd | Scotland | 1870 | BT31 | 1506 | 4692 | |
| Garon Load Mining Co. Ltd | 1877 | BT31 | 2369 | 11698 | ||
| Garthgill Mining Co. Ltd | Llanaber | Merionethshire | 1862 | BT31 | 667 | 2828 |
| Gawton Co. Ltd | Tavistock | Devon | 1883 | BT31 | 3200 | 18633 |
| Gawton Mining Co. Ltd | Tavistock | Devon | 1880 | BT286 | 495 | |
| Geifron Mining Co. Ltd | Llanidloes | Montgomeryshire | 1870 | BT31 | 1550 | 4974 |
| Gem Tin Mining Co. Ltd | Whitchurch | Devon | 1872 | BT286 | 264 | |
| General & Mines Agency Ltd | 1905 | BT31 | 11000 | 83617 | ||
| General Brazilian Mining Co. Ltd | 1868 | BT31 | 1413 | 4076 | ||
| General Co. of Spanish Mines Ltd | 1904 | BT31 | 10612 | 80286 | ||
| General International Mining Co. Ltd | 1907 | BT31 | 12241 | 96274 | ||
| General Mining & Metallurgical Syndicate Ltd | 1908 | BT31 | 18493 | 98870 | ||
| General Mining Association Ltd | 1869 | BT31 | 1481 | 4521 | ||
| General Mining Co of Ireland | Ireland | 1845 | BT41 | 253 | 1441 | |
| General Mining Financial Society | 1864 | BT31 | 929 | 1165C | ||
| General Prospecting & Mining Co. Ltd | 1909 | BT31 | 13023 | 106486 | ||
| General Refractories Co. Ltd | Barnsley | Yorkshire | 1913 | BT31 | 32170 | 132000 |
| General Sandur Mining Co. Ltd Vol 1 | 1907 | BT31 | 39202 | 94099 | ||
| General Sandur Mining Co. Ltd Vol 2 | 1907 | BT31 | 39203 | 94099 | ||
| General Smelting & Refining Co. Ltd | 1857 | BT31 | 248 | 814 | ||
| General Smelting & Refining Co. Ltd | BT41 | 255 | 1450 | |||
| General South African Land Exploration & Prospecting Syndicate Ltd | South Africa | 1888 | BT31 | 4126 | 26574 | |
| General Steam Navigation Co. Ltd | 1902 | BT31 | 10035 | 75044 | ||
| General Traction Engine Co. Ltd | 1871 | BT31 | 1614 | 5464 | ||
| George Briggs & Co. Ltd | 1911 | BT31 | 20127 | 116842 | ||
| Georgia Tin & Copper Mining Co. Ltd | St Hilary | Cornwall | 1872 | BT286 | 276 | |
| Geraldine Copper & Lead Mines Ltd | 1912 | BT31 | 32139 | 125068 | ||
| Geraldine Mining Co Western Australia Ltd | Western Australia | Australia | 1858 | BT31 | 353 | 1285 |
| Geraldine Mining Co Western Australia Ltd | Western Australia | Australia | BT41 | 256 | 1458 | |
| Geri Tin Syndicate (Northern Nigeria) Ltd | Helston Moor | Cornwall | 1910 | BT31 | 19667 | 111974 |
| German Mines Ltd | 1905 | BT31 | 11285 | 86315 | ||
| Gerona Copper & Lead Mines Co (Compagnie des Mines de Cuivre et de Plomp) | 1900 | BT31 | 9035 | 66837 | ||
| Ghatsillah (India) Mining Corporation Ltd | 1928 | BT31 | 30121 | 227989 | ||
| Giant’s Causeway Columnar Basalt Company Ltd | Ireland | 1910 | BT31 | 19184 | 107013 | |
| Gibbas Mining Co. Ltd | 1880-1891 | BT2 | 984 | |||
| Gibbas Silver Lead Mining Co. Ltd | 1872-1881 | BT2 | 439 | |||
| Gilfach Silver Lead Mining Co. Ltd | Dolbenmaen | Caernarvonshire | 1870 | BT31 | 1570 | 5125 |
| Gippsland Tin Mining Co. Ltd | Cornwall | 1874 | BT31 | 1937 | 8062 | |
| Girt & Holston Downs Mining Co. Ltd | Combe Martin | Devon | 1875 | BT286 | 404 | |
| Gitana Lead Mining & Smelting Co. Ltd | 1871 | BT31 | 1659 | 5813 | ||
| Gladstone Smelting & Mining Co. Ltd | 1883 | BT31 | 3129 | 18030 | ||
| Glain Pedror Mining Co. Ltd | 1872 | BT31 | 1680 | 5978 | ||
| Glamhudol Silver Lead Mining | 1862 | BT31 | 671 | 2852 | ||
| Glamorgan Consolidated Lead Mining Co. Ltd | Cowbridge | Glamorganshire | 1879 | BT31 | 2513 | 12981 |
| Glamorganshire Lead & Barytes Mining Co. Ltd | Llangan | Glamorganshire | 1861 | BT31 | 554 | 2255 |
| Glamorganshire Mining Co. Ltd | Glamorganshire | 1871 | BT31 | 1647 | 5715 | |
| Glan Alun Lead Mining Co. Ltd | Mold | Flintshire | 1863 | BT31 | 823 | 651C |
| Glan Clwyd Lead Mining Co. Ltd | Gwyddelwern | Merionethshire | 1874 | BT31 | 2036 | 8852 |
| Glan Rheidol Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1869 | BT31 | 1493 | 4615 |
| Glan Severn Lead Mining Co. Ltd | Cwm Rheidol | Cardiganshire | 1873 | BT31 | 1831 | 7130 |
| Glandore Mining Co. Ltd | Leap | Ireland | 1870 | BT31 | 1571 | 5135 |
| Glandovey Silver Lead Mining Co. Ltd | Glandovey | Cardiganshire | 1878 | BT31 | 2427 | 12261 |
| Glandovey Silver Lead Mining Co. Ltd | Glandovey | Cardiganshire | 1870 | BT31 | 1555 | 5018 |
| Glangwyden Lead Mining Co. Ltd | Llanidloes | Montgomeryshire | 1876 | BT31 | 2251 | 10737 |
| Glasdir Copper Mines (1903) Ltd | Llanfachreth | Merionethshire | 1903 | BT31 | 10457 | 78848 |
| Glasdir Copper Mines Ltd | Llanfachreth | Merionethshire | 1896 | BT31 | 6849 | 48183 |
| Glasdir Mining Co. Ltd | Llanfachreth | Merionethshire | 1867 | BT31 | 1357 | 3681 |
| Glasgow & London Mining & Exploration Co. Ltd | nd | BT2 | 3291 | |||
| Glasgow & Westralian Mining Agency Ltd | nd | BT2 | 3218 | |||
| Glasgow Caradon Co. Ltd | St Ive | Cornwall | 1888-1892 | BT2 | 1736 | |
| Glasgow Caradon Consolidated Copper Mining Co. Ltd | St Ive | Cornwall | 1860-1888 | BT2 | 54 | |
| Glasgow Cumberland Mining Co. Ltd | Cleator Moor | Cumberland | 1881-1885 | BT2 | 1038 | |
| Glasgow Mining Trust Ltd | 1896-1903 | BT2 | 3179 | |||
| Glasgow Mining Trust Ltd | 1896-1911 | BT2 | 3178 | |||
| Glasgow Rhodesian & Transvaal Mining Syndicate Ltd | nd | BT2 | 5477 | |||
| Glasgow Transvaal Prospecting Co. Ltd | 1889-1896 | BT2 | 1817 | |||
| Glasgow Wheal Gill Silver Lead Mining Co. Ltd | St Ive | Cornwall | 1861-1868 | BT2 | 71 | |
| Glen Mining & Exploration Co. Ltd | 1982 | BT2 | 1982 | 46910 | ||
| Glen Osmond Union Mining of South Australia Co | BT41 | 257 | 1467 | |||
| Glenariff Iron Ore & Harbour Co. Ltd | Co. Antrim | Ireland | 1873 | BT31 | 1829 | 7112 |
| Glenaulin & Carivilleen Mining Co of Ireland | Kilcrohane | Ireland | 1852 | BT41 | 257 | 1465 |
| Glenbarr Mining Co. Ltd | 1910 | BT31 | 13295 | 110378 | ||
| Glenchass Mining Co. Ltd | Fistard | Isle of Man | BT41 | 257 | 1466 | |
| Glenchass Mining Co. Ltd | Fistard | Isle of Man | 1860 | BT31 | 485 | 1914 |
| Glendinning Antimony Mines Ltd | Langholm | Dumfriesshire | 1919 | BT31 | 24367 | 152882 |
| Glendinning Syndicate | Langholm | Dumfriesshire | 1890 | BT31 | 4664 | 30680 |
| Glenroy Lead Mining Co. Ltd | Laxey | Isle of Man | 1876 | BT31 | 2235 | 10606 |
| Glittenberg Copper Mines Ltd | 1896 | BT31 | 7134 | 50321 | ||
| Globe Industrials Inventions & Mines Finance Corporation Ltd | 1900 | BT31 | 9073 | 67144 | ||
| Glyn Llugwy Consolidated Lead Mining Co. Ltd | Gwydr | Caernarvonshire | 1878 | BT31 | 2473 | 12652 |
| Glyn Mines Ltd | 1907 | BT31 | 18181 | 94495 | ||
| Glyndwr Mining Co. Ltd | Mold | Flintshire | 1889 | BT31 | 4390 | 28524 |
| Gobbett Tin Mine Ltd | Hexworthy | Devon | 1888 | BT286 | 82 | |
| Gobbett Tin Mine Ltd | Hexworthy | Devon | 1881 | BT286 | 530 | |
| Gobbett Tin Mining Co. Ltd | Lidford | Devon | 1871 | BT286 | 215 | |
| Goddard’s Lead & Blende Mining Co. Ltd | Llanrwst | Caernarvonshire | 1881 | BT31 | 2781 | 15185 |
| Godolphin Hill Mining Co. Ltd | Breage | Cornwall | 1865 | BT286 | 113 | |
| Goginan & Level Newydd Mines Co. Ltd | Goginan | Cardiganshire | 1873 | BT31 | 1897 | 7650 |
| Goginan Mines Co. Ltd | Goginan | Cardiganshire | BT41 | 259 | 1481 | |
| Goginan Mines Co. Ltd | Goginan | Cardiganshire | 1858 | BT31 | 335 | 1194 |
| Goginan Mines Realisation Co. Ltd | Goginan | Cardiganshire | 1886 | BT31 | 3603 | 22170 |
| Goginan Silver Lead Mine Ltd | Goginan | Cardiganshire | 1881 | BT31 | 2784 | 15203 |
| Gonesa Mining Co. Ltd | Italy | 1864 | BT31 | 904 | 1031C | |
| Goodevere Mining Co. Ltd | St Cleer | Cornwall | 1876 | BT286 | 436 | |
| Goodevere Tin Mining Co. Ltd | St Cleer and Altarnun | Cornwall | 1881 | BT286 | 526 | |
| Goodevere Tin Mining Co. Ltd | St Cleer and Altarnun | Cornwall | 1888 | BT286 | 90 | |
| Goole Alum & Smelting Co. Ltd | Goole | Yorkshire | 1866 | BT31 | 1272 | 3143 |
| Gooninnis Mine Co | St Agnes | Cornwall | 1862 | BT31 | 662 | 2798 |
| Gooninnis Tin Mining Co. Ltd | St Agnes | Cornwall | 1872 | BT286 | 294 | |
| Gopeng Tin Mining Co. Ltd | Cornwall | 1892 | BT31 | 5308 | 36317 | |
| Gordon Mining Co. Ltd | 1881 | BT31 | 2759 | 15025 | ||
| Goreu Silver Lead Mining Co. Ltd | Carmarthenshire | 1876 | BT31 | 2222 | 10499 | |
| Gors Farm Lead Mining Co. Ltd | Cilcain | Flintshire | 1878 | BT31 | 2448 | 12443 |
| Gorsedd & Celyn Level Consolidated Lead Mining Co. Ltd | Whitford | Flintshire | 1870 | BT31 | 1520 | 4774 |
| Gorsedd & Merllyn Consols Mining Co. Ltd | Whitford | Flintshire | 1875 | BT31 | 2062 | 9096 |
| Gorsedd & Sinclair United Mines Ltd | Whitford | Flintshire | 1885 | BT31 | 3512 | 21389 |
| Goss Moor Tin Alluvials Ltd | St Dennis | Cornwall | 1911 | BT31 | 19990 | 115560 |
| Gothic Silver Lead Mining Co. Ltd | Aberffrwd | Cardiganshire | 1866 | BT31 | 1217 | 2791C |
| Goulding Placers Ltd | Colorado | U.S.A. | 1887 | BT31 | 3861 | 24347 |
| Gourock Copper Mining Co. Ltd | Gourock | Renfrewshire | 1862-1881 | BT2 | 93 | |
| Governor Group Ltd | Colorado | U.S.A. | 1887 | BT31 | 3857 | 24312 |
| Grace Darling (Broken Hill) Silver Mines Ltd | Australia | 1889 | BT31 | 4611 | 30248 | |
| Gran Suerte Mining Co. Ltd | 1873 | BT31 | 1901 | 7689 | ||
| Grand Central Silver Mines Ltd | New Mexico | U.S.A. | 1891 | BT31 | 5162 | 34882 |
| Grand Duchess Silver Lead & Barytes Mining Co. Ltd | Llangwnior | Carmarthenshire | 1878 | BT31 | 2441 | 12387 |
| Grand Junction Smelting & Refining Co. Ltd | 1907 | BT31 | 12004 | 93686 | ||
| Grande Bonanza Mines Re-opening Syndicate Ltd | 1904 | BT31 | 10857 | 82392 | ||
| Grande Vernissiere Mine Ltd | 1902 | BT31 | 10060 | 75257 | ||
| Granville Mining Co. Ltd | 1911 | BT31 | 20168 | 117226 | ||
| Graskop No.5 Ltd | South Africa | 1885 | BT31 | 3433 | 20690 | |
| Grass Valley Consolidated Mining Co. Ltd | California | U.S.A. | 1868 | BT31 | 1409 | 4042 |
| Grasshill Lead Mining Co. Ltd | Harwood | Durham | 1894 | BT31 | 6014 | 42464 |
| Grassington Lead Mines Ltd | Grassington | Yorkshire | 1918 | BT31 | 24052 | 150399 |
| Gravesend Smelting & Refining Co. Ltd | 1917 | BT31 | 23805 | 148349 | ||
| Great Anglo Austrian Gas Co. Ltd | 1863 | BT31 | 808 | 567C | ||
| Great Barrier Land Harbour & Mining Co. Ltd | New Zealand | BT41 | 265 | 1516 | ||
| Great Barrier Land Harbour & Mining Co. Ltd | New Zealand | 1857 | BT31 | 258 | 855 | |
| Great Beam Tin Mine Ltd | Roche | Cornwall | 1888 | BT286 | 128 | |
| Great Beam Tin Mine Ltd | Roche | Cornwall | 1888 | BT286 | 593 | |
| Great Boulder Mining & Finance Ltd | 1935 | BT31 | 38523 | 302501 | ||
| Great Calcot Lead Mine Ltd | Holywell | Flintshire | 1891 | BT31 | 5102 | 34361 |
| Great Caradon & Slade Mining Co. Ltd | St Ives | Cornwall | 1858 | BT41 | 266 | 1524 |
| Great Caradon & Slade Mining Co. Ltd | St Ives | Cornwall | 1857 | BT31 | 275 | 932 |
| Great Central Mining Co of Devon Ltd | Ilsington | Devon | 1859 | BT31 | 396 | 1496 |
| Great Central Mining Co of Devon Ltd | Ilsington | Devon | BT41 | 267 | 1526 | |
| Great Chiverton Consolidated Silver Lead Mining Co. Ltd | St Allen | Cornwall | 1867 | BT286 | 147 | |
| Great Condurrow Tin & Copper Mining Co. Ltd | Camborne | Cornwall | 1902 | BT31 | 9775 | 72822 |
| Great Coniston Copper Mining Co. Ltd | Coniston | Lancashire | 1873 | BT31 | 1838 | 7182 |
| Great Consolidated Mining Co of Spain Ltd | Spain | 1881 | BT31 | 2874 | 15872 | |
| Great Consols Mining Co. Ltd | St Stephen in Brannel | Cornwall | 1880 | BT286 | 515 | |
| Great Cornish Tin Consols Ltd | Cornwall | 1881 | BT31 | 2817 | 15442 | |
| Great Darren Silver Lead Mining Co. Ltd | Goginan | Cardiganshire | 1862 | BT31 | 610 | 2562 |
| Great D’Eresby Mining Co. Ltd | Llanrhychwyn | Caernarvonshire | 1878 | BT31 | 2445 | 12424 |
| Great Devon & Bedford (Colcharton) Mining Co. Ltd | Tavistock | Devon | 1862 | BT31 | 713 | 87C |
| Great Dinorben Mining Co. Ltd | Wales | 1862 | BT31 | 667 | 2825 | |
| Great Dowgas (1912) Tin Mining Co. Ltd | Hewas Water | Cornwall | 1912 | BT31 | 13848 | 120822 |
| Great Dowgas Tin Mines Ltd | St Stephen in Brannel | Cornwall | 1905 | BT31 | 11179 | 85303 |
| Great Dylife Lead & Copper Mines Ltd | Llanbrynmair | Montgomeryshire | 1900 | BT31 | 9220 | 68420 |
| Great Dyliffe Lead Mining Co. Ltd | Llanbrynmair | Montgomeryshire | 1876 | BT31 | 2220 | 10483 |
| Great Dyliffe Mining Co. Ltd | Llanbrynmair | Montgomeryshire | 1879 | BT31 | 2510 | 12959 |
| Great East Clifford Amalgamated Mining Co. Ltd | Gwennap | Cornwall | 1866 | BT286 | 133 | |
| Great East Foxdale Silver Lead Mining Co. Ltd | Foxdale | Isle of Man | 1871 | BT31 | 1632 | 5594 |
| Great Eastern Lode Ltd | New South Wales | Australia | 1892 | BT31 | 5280 | 36028 |
| Great Elwy River Lead Mines Ltd | Abergele | Denbighshire | 1874 | BT31 | 2026 | 8785 |
| Great European Mining & Manufacturing Iron Co | BT41 | 267 | 1533 | |||
| Great Fron Fownog Consolidated Lead Mining Co. Ltd | Hendrabiffa | Flintshire | 1869 | BT31 | 1493 | 4622 |
| Great Harvest Tin & Copper Mining Co. Ltd | Cornwall | 1872 | BT286 | 295 | ||
| Great Hewas Tin Mines Ltd | St Mewan | Cornwall | 1881 | BT31 | 2799 | 15323 |
| Great Holway Lead Co. Ltd | Holywell | Flintshire | 1877 | BT31 | 2363 | 11643 |
| Great Laxey Ltd | Laxey | Isle of Man | 1903 | BT31 | 16979 | 76574 |
| Great Laxey Mining Co. Ltd | Laxey | Isle of Man | 1862 | BT31 | 720 | 133C |
| Great Luxulyan Hematite Iron & Tin Mining Co. Ltd | Luxulyan | Cornwall | 1873 | BT286 | 329 | |
| Great Maori Dream Mine Ltd | 1896 | BT31 | 6830 | 48055 | ||
| Great Moelwyn Slate Co. Ltd | Wales | 1860 | BT31 | 452 | 1747 | |
| Great Mona Mining Co. Ltd | Maughold | Isle of Man | 1865 | BT31 | 1151 | 2414C |
| Great Mountain Silver Lead Mining Co. Ltd | Llandwrog | Caernarvonshire | 1871 | BT31 | 1647 | 5706 |
| Great New Westminster Lead Mines Ltd | Llanarmon | Denbighshire | 1881 | BT31 | 2872 | 15851 |
| Great North Caradon Silver Lead & Copper Mining Co. Ltd | Advent | Cornwall | 1872 | BT286 | 283 | |
| Great North Laxey Mining Co. Ltd | Maughold | Isle of Man | 1865 | BT31 | 1053 | 1843C |
| Great North Tolgus Mining Co. Ltd | Redruth | Cornwall | 1862 | BT31 | 669 | 2836 |
| Great Northern Copper Mining Co of South Australia Ltd | South Australia | Australia | BT41 | 271 | 1558 | |
| Great Northern Copper Mining Co of South Australia Ltd | South Australia | Australia | 1859 | BT31 | 438 | 1691 |
| Great Northern Manganese Co. Ltd | Bala | Merionethshire | 1868 | BT31 | 1393 | 3935 |
| Great Northern Mining Co. Ltd | MN | BT41 | 272 | 1561 | ||
| Great Northern Mining Co. Ltd | MN | 1857 | BT31 | 223 | 705 | |
| Great Northern Mining Co. of Ireland Ltd | Ireland | 1863-1873 | BT2 | 134 | ||
| Great Northern Mining Syndicate of Canada Ltd | Canada | 1898 | BT31 | 15979 | 57334 | |
| Great Onslow Consols Copper Mining Co. Ltd | St Breward | Cornwall | 1870 | BT286 | 201 | |
| Great Pant y Pydew Consolidated Silver Lead Mining Co. Ltd | Brynford | Flintshire | 1875 | BT31 | 2110 | 9568 |
| Great Polgooth United Tin Mines Co. Ltd | St Austell | Cornwall | 1881 | BT31 | 2769 | 15104 |
| Great Rake Lead Mining Co. Ltd | Brassington | Derbyshire | 1874 | BT31 | 1948 | 8178 |
| Great Rhosesmor Mining Co. Ltd | Halkyn | Flintshire | 1865 | BT31 | 14377 | 2714c |
| Great Rock Lead Mining Co. Ltd | Gwyddelwern | Merionethshire | 1869 | BT31 | 1458 | 4376 |
| Great Rosevidney Mining Co. Ltd | Cornwall | 1869 | BT286 | 183 | ||
| Great Snowdon Mountain Copper Mining Co. Ltd | Capel Curig | Caernarvonshire | 1873 | BT31 | 1825 | 7082 |
| Great South Chiverton Silver Lead Mining Co. Ltd | Perranzabuloe | Cornwall | 1872 | BT286 | 308 | |
| Great Trewollack Wheal Rose Silver Lead Mining Co. Ltd | St Colomb Minor | Cornwall | 1866 | BT286 | 115 | |
| Great Tywarnhaile Mining Co. Ltd | St Agnes | Cornwall | 1860 | BT31 | 445 | 1717 |
| Great Tywarnhaile Mining Co. Ltd | St Agnes | Cornwall | BT41 | 273 | 1567 | |
| Great Week Consols Tin Mining Co. Ltd | Chagford | Devon | 1890 | BT31 | 4946 | 33006 |
| Great West Chiverton Mine Co. Ltd | Perranzabuloe | Cornwall | 1869 | BT286 | 184 | |
| Great West Cornwall Mining Co. Ltd | Cornwall | 1866 | BT286 | 123 | ||
| Great West Shepherds Ltd | Newlyn East | Cornwall | 1884 | BT31 | 3308 | 19552 |
| Great West Van Lead Mining Co. Ltd | Llanbadarnfawr | Cardiganshire | 1873 | BT31 | 1811 | 6961 |
| Great Western Silver Mining Co. Ltd | Nevada | U.S.A. | 1871 | BT31 | 1611 | 5439 |
| Great Wheal Bonnie Tin Mining Co. Ltd | St Austell | Cornwall | 1864 | BT286 | 65 | |
| Great Wheal Busy United Mining Co. Ltd | Kenwyn | Cornwall | 1855 | BT41 | 274 | 1577 |
| Great Wheal Caradon Mines Ltd | St Ives | Cornwall | 1881 | BT31 | 2823 | 15486 |
| Great Wheal Eleanor Tin Mining Co. Ltd | North Bovey | Devon | 1874 | BT286 | 388 | |
| Great Wheal Grylls Ltd | St Hilary | Cornwall | 1883 | BT31 | 3100 | 17762 |
| Great Wheal Martha Mining Co. Ltd | Stoke Climsland | Cornwall | 1859 | BT41 | 274 | 1578 |
| Great Wheal Metal Tin Mining Co. Ltd | Breage | Cornwall | 1864 | BT286 | 71 | |
| Great Wheal Polgooth | St Austell | Cornwall | 1881 | BT31 | 2764 | 15065 |
| Great Wheal Rodd Silver Lead Mining Co. Ltd | North Hill | Cornwall | 1877 | BT286 | 454 | |
| Great Wheal Worthy Tin Mining Co. Ltd | Crowan | Cornwall | 1881 | BT31 | 2814 | 15420 |
| Great Work Consolidated Tin Mines Co. Ltd | Breage | Cornwall | 1888 | BT31 | 4244 | 27502 |
| Great Work Mines Syndicate Ltd | Breage | Cornwall | 1890 | BT31 | 4852 | 32192 |
| Great Work Tin Mines Ltd | Breage | Cornwall | 1934 | BT31 | 35606 | 289150 |
| Great Work Tin Mining & Development Syndicate Ltd | Breage | Cornwall | 1896 | BT31 | 6825 | 48027 |
| Green Hurth Lead Mining Co. Ltd | Forest & Frith | Durham | 1880 | BT31 | 2655 | 14131 |
| Green Hurth Lead Mining Co. Ltd | Forest & Frith | Durham | 1887 | BT31 | 3833 | 24107 |
| Green Hurth Lead Mining Co. Ltd | Forest & Frith | Durham | 1864 | BT31 | 988 | 1483C |
| Green Mountain Mining Co (of Silverton) Ltd | 1881 | BT31 | 2879 | 15924 | ||
| Greenhaugh Mining Co. Ltd | Appletreewick | Yorkshire | 1915 | BT31 | 22959 | 141377 |
| Greenside Mining Co. Ltd | Patterdale | Westmorland | 1889 | BT31 | 15019 | 29821 |
| Greenside Mining Co. Ltd | Patterdale | Westmorland | 1923 | BT31 | 32557 | 187322 |
| Greensward Mining Co. Ltd | Lathkill Dale | Derbyshire | 1892 | BT31 | 5461 | 37771 |
| Grenville United Mines Ltd | Camborne | Cornwall | 1906 | BT31 | 17805 | 89336 |
| Grenville United Mines Ltd | Camborne | Cornwall | 1919 | BT31 | 25153 | 159971 |
| Greystone Wood Manganese Syndicate Ltd | Lezant | Cornwall | 1907 | BT31 | 18144 | 94045 |
| Gribdale Mining Co. Ltd | Gribdale | Yorkshire | 1912 | BT31 | 20439 | 119944 |
| Griffin Silver Lead Mining Co. Ltd | Trefriw | Caernarvonshire | 1878 | BT31 | 2459 | 12546 |
| Grimwith Lead Mining Co. Ltd | Appletreewick | Yorkshire | 1863 | BT31 | 843 | 747C |
| Grinton Mining & Smelting Co. Ltd | Grinton | Yorkshire | 1888 | BT31 | 4119 | 26497 |
| Griqualand Diamond Mining Co. Ltd | 1877 | BT31 | 2355 | 11571 | ||
| Grit & Stapeley Mines Co. Ltd | Shelve | Shropshire | 1863 | BT31 | 764 | 361C |
| Grit Mining Co. Ltd | Minsterley | Shropshire | 1898 | BT31 | 7807 | 55843 |
| Groenvallei Prospecting Syndicate Ltd | 1896 | BT31 | 7034 | 49554 | ||
| Grogwinion Consolidated Mines Ltd | Pontrhydygroes | Cardiganshire | 1884 | BT31 | 3407 | 20456 |
| Grogwinion Lead Mining Co. Ltd | Pontrhydygroes | Cardiganshire | 1872 | BT31 | 1739 | 6421 |
| Gronant Mining Co. Ltd | Llanasa | Flintshire | 1863 | BT31 | 755 | 309C |
| Grootolei Prospecting Syndicate Ltd | 1901 | BT31 | 9307 | 69189 | ||
| Grosvenor (1866) Lead Mining Co. Ltd | Halkyn | Flintshire | 1866 | BT31 | 1256 | 3043 |
| Grosvenor Lead Mining Co | Halkyn | Flintshire | 1853 | BT41 | 278 | 1601 |
| Grosvenor Lead Mining Co. Ltd | Halkyn | Flintshire | 1874 | BT31 | 1987 | 8506 |
| Grosvenor Lead Mining Co. Ltd | Halkyn | Flintshire | 1858 | BT31 | 381 | 1410 |
| Grylls Mines Ltd | St Hilary | Cornwall | 1908 | BT31 | 18433 | 97985 |
| Guadalcanal Silver Mining Association | BT41 | 279 | 1605 | |||
| Guadalcazar Quicksilver Mines Ltd | Mexico | 1890 | BT31 | 4790 | 31714 | |
| Guarino Mines Syndicate Ltd | 1906 | BT31 | 11470 | 88251 | ||
| Guide Mining Co. Ltd | 1909 | BT31 | 13003 | 106222 | ||
| Gurlyn Consolidated Tin Mines (Cornwall) Ltd | Relubbus | Cornwall | 1906 | BT31 | 17800 | 89251 |
| Gurtavallig Mining Co | Ireland | 1845 | BT41 | 280 | 1609 | |
| Gustave Cahn Mining & Engineering Co. Ltd | 1913 | BT31 | 21271 | 127469 | ||
| Guston Silver Mine Co. Ltd | 1886 | BT31 | 3610 | 22228 | ||
| Gwaenysgor Mining Co. Ltd | Rhyl | Flintshire | 1870 | BT31 | 1563 | 5077 |
| Gwalla Copper Mines Ltd | 1889 | BT31 | 4532 | 29651 | ||
| Gwanda Mines Ltd | 1899 | BT31 | 8694 | 63453 | ||
| Gweek Consols Mining Co. Ltd | Cornwall | 1886 | BT31 | 3685 | 22905 | |
| Gwennap Tin & Copper Mine Co. Ltd | Gwennap | Cornwall | 1884 | BT31 | 3408 | 20463 |
| Gwent Engineering & Mining Supplies Ltd Plain Vol. | 1960 | BT31 | 42772 | 669289 | ||
| Gwestyn Consols Ltd | Llanidloes | Montgomeryshire | 1872 | BT31 | 1754 | 6541 |
| Gwin & Singer United Tin Mines Ltd | Breage | Cornwall | 1888 | BT31 | 4114 | 26444 |
| Gwinear Tin Elvan Quarry & Mine Co | Gwinear | Cornwall | 1889 | BT286 | 598 | |
| Gwinear Tin Elvan Quarry & Mine Ltd | Gwinear | Cornwall | 1889 | BT286 | 142 | |
| Gwinear Tin Mines Ltd | Gwinear | Cornwall | 1912 | BT31 | 13901 | 122169 |
| Gwinear Tin Mines Ltd | Gwinear | Cornwall | 1919 | BT31 | 32298 | 156865 |
| Gwydyr Amalgamated Mines Co. Ltd | Llanrwst | Caernarvonshire | 1881 | BT31 | 2764 | 15063 |
| Gwydyr Lead Mining Co. Ltd | Llanrhychwyn | Caernarvonshire | 1859 | BT31 | 403 | 1540 |
| Gwydyr Lead Mining Co. Ltd | Llanrhychwyn | Caernarvonshire | BT41 | 280 | 1611 | |
| Gwydyr Park Consolidated Mining Co. Ltd | Llanrwst | Caernarvonshire | 1870 | BT31 | 1547 | 4956 |
| Gwyn Mines (Merioneth) Ltd | Dolgellau | Merionethshire | 1901 | BT31 | 9417 | 69970 |
| Gwynant Copper Mines Ltd | 1902 | BT31 | 9756 | 72666 | ||
| Gympie Copper Mines Ltd | 1900 | BT31 | 8895 | 65482 | ||
| H.R. Briggs & Co. Ltd | 1886 | BT31 | 3591 | 22061 | ||
| H.W. Briggs Ltd | 1907 | BT31 | 18272 | 95675 | ||
| Haematite Ore Concentrates Ltd | 1914 | BT31 | 22363 | 136448 | ||
| Hafan Mining Co. Ltd | Bont-goch | Cardiganshire | 1910 | BT31 | 13319 | 110786 |
| Hafna Mines Ltd | Llanrwst | Caernarvonshire | 1907 | BT31 | 18252 | 95391 |
| Hafna Mining & Smelting Co. Ltd | Llanrwst | Caernarvonshire | 1885 | BT31 | 3558 | 21756 |
| Hafod Consuls Lead Mining Co. Ltd | Gwernymynydd | Flintshire | 1860 | BT31 | 507 | 2014 |
| Hafod Lead Mining Co. Ltd | Machynlleth | Montgomeryshire | 1875 | BT31 | 2150 | 9957 |
| Hafod Lead Mining Co. Ltd | Pontrhydygroes | Cardiganshire | 1861 | BT31 | 595 | 2484 |
| Hafodan Mining Co. Ltd | Wales | 1872 | BT31 | 1712 | 6206 | |
| Half-Mile Reef Mines Ltd | 1902 | BT31 | 9904 | 73823 | ||
| Half-Mile Reef Mines Ltd | 1899 | BT31 | 8403 | 61118 | ||
| Halkin Consolidated Lead Mines Ltd | Halkyn | Flintshire | 1868 | BT31 | 1381 | 3840 |
| Halkin Deep Level Mining Co. Ltd | Halkyn | Flintshire | 1871 | BT31 | 1610 | 5433 |
| Halkyn Hall Mineral Co. Ltd | Halkyn | Flintshire | 1886 | BT31 | 3730 | 23231 |
| Halkyn Lead Mining Co. Ltd | Holywell | Flintshire | 1877 | BT31 | 2391 | 11893 |
| Halkyn Mining Co. Ltd | Holywell | Flintshire | 1883 | BT31 | 30990 | 17860 |
| Hall Mines Ltd | 1893 | BT31 | 5599 | 38980 | ||
| Hall Mining & Smelting Co. Ltd | 1900 | BT31 | 8962 | 66146 | ||
| Hall Valley Silver Lead Mining & Smelting Co. Ltd | 1873 | BT31 | 1821 | 7052 | ||
| Halvinna Fox Tor & Red Hill Tin Mining Co. Ltd | Altarnun | Cornwall | 1871 | BT286 | 230 | |
| Halvinna Mines Ltd | Altarnun | Cornwall | 1901 | BT31 | 9660 | 71807 |
| Hamilton Mining & Smelting Co. Ltd | 1870 | BT31 | 1563 | 5080 | ||
| Hamilton Smelting Co. Ltd | 1871 | BT31 | 1636 | 5612 | ||
| Hampton United Mines Ltd | Cornwall | 1905 | BT31 | 11104 | 84573 | |
| Hancock Mining Co. Ltd | BT41 | 284 | 1638 | |||
| Hancock Mining Co. Ltd | 1859 | BT31 | 419 | 1615 | ||
| Hannan’s Associated Mines Ltd | 1897 | BT31 | 7663 | 54702 | ||
| Hannan’s Reefs Ltd | 1896-1900 | BT2 | 3130 | |||
| Hanoverian Mining Association Ltd | 1877 | BT31 | 2302 | 11114 | ||
| Hapunda Mining | 1856 | BT31 | 151 | 463 | ||
| Hardshins Mining Co. Ltd | Milburn | Westmorland | 1883 | BT31 | 3210 | 18711 |
| Hardy Mining Co. Ltd | 1910 | BT31 | 19556 | 110624 | ||
| Harehope Gill Lead Mining Co. Ltd | Edmondbyers | Durham | 1863 | BT31 | 766 | 374C |
| Harehope Gill Mining Co. Ltd | Edmondbyers | Durham | 1875 | BT31 | 2119 | 9676 |
| Harewood Great Consols Mining Co. Ltd | Calstock | Cornwall | 1881 | BT286 | 523 | |
| Harlech Mining Co. Ltd | Harlech | Merionethshire | 1888 | BT31 | 4103 | 26335 |
| Harlech Silver Lead Copper & Sulphur Mining Co. Ltd | Harlech | Merionethshire | 1871 | BT31 | 1597 | 5331 |
| Harlech Sulphur Mining Co. Ltd | Harlech | Merionethshire | 1883 | BT31 | 3117 | 17917 |
| Harmony & Montague Tin & Copper Mining Co. Ltd | Redruth | Cornwall | 1870 | BT286 | 210 | |
| Harrowbarrow Mining Co. Ltd | St Mellion | Cornwall | 1880 | BT286 | 488 | |
| Hartley Mines Ltd | 1903 | BT31 | 10429 | 78594 | ||
| Hartopp & West Kerry Copper Mining Co | Kilcrohane | Ireland | 1852 | BT41 | 286 | 1654 |
| Hartz Mining & Smelting Co. Ltd | 1865 | BT31 | 1198 | 2685C | ||
| Harwood Mining Co. Ltd | Harwood | Durham | 1857 | BT41 | 287 | 1663 |
| Hauraki Mines Ltd | 1900 | BT31 | 9167 | 67944 | ||
| Havan Silver Lead Mines Co. Ltd | Tal-y-bont | Cardiganshire | 1863 | BT31 | 780 | 436C |
| Hayford Mines Ltd | St Ive | Cornwall | 1898 | BT31 | 8102 | 58440 |
| Haytor Iron Mines Ltd | Ilsington | Devon | 1918 | BT31 | 24298 | 152289 |
| Haytor Mining Co. Ltd | Ilsington | Devon | 1880 | BT286 | 487 | |
| Hazelgrove Calcot Hall & Caerhun Amalgamated Lead Mines Co. Ltd | Halkyn | Flintshire | 1871 | BT31 | 1654 | 5777 |
| Hazelholme Mining Co. Ltd | Cleator Moor | Cumberland | 1912 | BT31 | 13856 | 121046 |
| Hazleholm Lead Mining Co. Ltd | Cleator Moor | Cumberland | 1872 | BT31 | 1678 | 5962 |
| Healeyfield Mining Co. Ltd | Castleside | Durham | 1882 | BT31 | 3019 | 17068 |
| Hebden Moor Mining Co. Ltd | Hebden | Yorkshire | 1889 | BT31 | 4374 | 28418 |
| Heckmondwike Ironworks Co. Ltd | Heckmondwike | Yorkshire | 1865 | BT31 | 1046 | 1808C |
| Hedemieh & Sherms Mining Syndicate Ltd | 1914 | BT31 | 22399 | 136724 | ||
| Hedworth Barium Co. Ltd | Hedworth | Durham | 1891 | BT31 | 15157 | 34210 |
| Heidberg Silver Lead Mining Co. Ltd | 1870 | BT31 | 1553 | 4998 | ||
| Helvellyn Consols Copper & Lead Mining Co. Ltd | Grasmere | Cumberland | BT41 | 290 | 1685 | |
| Helvellyn Consols Copper & Lead Mining Co. Ltd | Helvellyn | Cumberland | 1858 | BT31 | 329 | 1168 |
| Helvellyn Mining Co. Ltd | Grasmere | Cumberland | 1870 | BT31 | 1561 | 5068 |
| Hem Heath Mining Co. Ltd | Stoke-on-Trent | Staffordshire | 1864 | BT31 | 1006 | 1583C |
| Hemerdon Syndicate Ltd | Hemerdon | Devon | 1937 | BT31 | 33666 | 315828 |
| Hendra Consolidated Tin Mines Co. Ltd | Breage | Cornwall | 1887 | BT286 | 74 | |
| Hendra Consolidated Tin Mines Co. Ltd | Breage | Cornwall | 1887 | BT286 | 583 | |
| Hendre Lead Mining Co. Ltd | Rhydymwyn | Flintshire | 1863 | BT31 | 819 | 628C |
| Hendre Mine Co. Ltd | Rhydymwyn | Flintshire | 1857 | BT31 | 290 | 997 |
| Hendre Mine Co. Ltd | Rhydymwyn | Flintshire | BT41 | 291 | 1687 | |
| Hendy Mining Co. Ltd | Llantrissant | Glamorganshire | 1863 | BT31 | 749 | 276C |
| Hennock Black Ore Co. Ltd | Hennock | Devon | 1857 | BT31 | 234 | 747 |
| Henriett Mining & Smelting Co. Ltd | Colorado | U.S.A. | 1882 | BT31 | 3051 | 17332 |
| Henriett Silver Mining Co. Ltd | 1882 | BT31 | 2981 | 16765 | ||
| Henry Briggs Son & Co. Ltd | Normanton | Yorkshire | 1865 | BT31 | 38180 | 2026C |
| Henry Lamplough Ltd | 1886 | BT31 | 14828 | 22733 | ||
| Henry Ness & Co. Ltd | 1892-1899 | BT2 | 2318 | |||
| Hensbarrow United Mines Ltd | Roche | Cornwall | 1872 | BT286 | 291 | |
| Hercynia Copper Co. Ltd | Germany | 1891 | BT31 | 5113 | 34453 | |
| Hermoine Copper Mines Ltd | 1905 | BT31 | 11066 | 84172 | ||
| Herrerias Mines Ltd | 1892 | BT31 | 5277 | 35995 | ||
| Hexham & Edmondbyers Mining Co. Ltd | Edmondbyers | Durham | 1871 | BT31 | 1662 | 5844 |
| Hexhamshire Mining Co. Ltd | Durham | 1876 | BT31 | 2246 | 10688 | |
| Hexworthy Co. Ltd | Hexworthy | Devon | 1892 | BT31 | 5441 | 37590 |
| Hexworthy Tin Mining Co. Ltd | Hexworthy | Devon | 1889 | BT31 | 4577 | 29967 |
| Hibernian Copper Syndicate Ltd | Ireland | 1907 | BT31 | 11962 | 93267 | |
| Hibernian Development Co. Ltd | Ireland | 1900 | BT31 | 9286 | 69017 | |
| Hiendelaencina Mining Co. Ltd | 1914 | BT31 | 22040 | 133778 | ||
| High Peak Mining & Smelting Co. Ltd | Denbighshire | 1857 | BT31 | 317 | 1106 | |
| High Peak Mining & Smelting Co. Ltd | Denbighshire | 1857 | BT41 | 296 | 1718 | |
| Highfield Haematite Iron Ore Co. Ltd | Dalton in Furness | Lancashire | 1872 | BT31 | 1688 | 6026 |
| Hillgrove Proprietary Mines Ltd | 1897 | BT31 | 7588 | 54148 | ||
| Hillside Mining Co. Ltd | 1934 | BT31 | 33898 | 288648 | ||
| Himalayah Mining Co. Ltd | 1872 | BT31 | 1776 | 6694 | ||
| Hindostan (Singhbhoom) Copper Co. Ltd | India | 1861 | BT31 | 592 | 2465 | |
| Hinemoa Mines Ltd | 1898 | BT31 | 8066 | 58146 | ||
| Hingston & Clitters Mines Ltd | Hingston | Cornwall | 1908 | BT31 | 12450 | 98819 |
| Hingston Down Consols Mining Co. Ltd | Gunnislake | Cornwall | 1873 | BT286 | 339 | |
| Hirnant Lead Mining Co. Ltd | Hirnant | Montgomeryshire | BT41 | 297 | 1729 | |
| Hirnant Lead Mining Co. Ltd | Hirnant | Montgomeryshire | 1859 | BT31 | 404 | 1543 |
| Hobbs Hill Mining Co. Ltd | St Neot | Cornwall | 1871 | BT286 | 221 | |
| Hodyoad Iron Mining Co. Ltd | 1872 | BT31 | 1749 | 6504 | ||
| Hoenachos Silver Lead Mining Co. Ltd | 1873 | BT31 | 1804 | 6911 | ||
| Hoffman Mine Ltd | 1897 | BT31 | 7206 | 50966 | ||
| Holbeck Mining Co. Ltd | MN | 1883 | BT31 | 3117 | 17925 | |
| Hollins Mining Co. Ltd | 1913 | BT31 | 21308 | 127809 | ||
| Holmbush & Kelly Bray United Mining Co. Ltd | Stoke Climsland | Cornwall | 1869 | BT286 | 176 | |
| Holmbush Ltd | Stoke Climsland | Cornwall | 1876 | BT31 | 2295 | 11069 |
| Holmes Oil Co. Ltd | 1884-1904 | BT2 | 1342 | |||
| Holway Consols Ltd | Holywell | Flintshire | 1883 | BT31 | 3209 | 18704 |
| Holway Silver Lead Mining Co. Ltd | Holywell | Flintshire | 1872 | BT31 | 1792 | 6814 |
| Holway United Mines Ltd | Holywell | Flintshire | 1886 | BT31 | 3710 | 23076 |
| Holyfield Lead Mining Co. Ltd | Alston with Garrigill | Cumberland | 1870 | BT31 | 1516 | 4748 |
| Holyford Copper Mining Association | Ireland | 1845 | BT41 | 299 | 1740 | |
| Holyford Mining Co. Ltd | Ireland | 1866 | BT31 | 1259 | 3064 | |
| Holyrood Exploration Co. Ltd | Ireland | 1889-1893 | BT2 | 1913 | ||
| Holywell District Lead Co. Ltd | Holywell | Flintshire | 1884 | BT31 | 3390 | 20302 |
| Holywell Level Silver Lead Mining Co. Ltd | Holywell | Flintshire | 1865 | BT31 | 1130 | 2299C |
| Holywell Pantypydew Lead Mining Co. Ltd | Holywell | Flintshire | 1870 | BT31 | 1569 | 5117 |
| Holywell Silver Lead Mining Co. Ltd | Holywell | Flintshire | 1874 | BT31 | 1957 | 8256 |
| Home & Foreign Mines Trust Ltd | 1886 | BT31 | 3750 | 23376 | ||
| Home Minerals & Industries Development Trust Ltd | 1918 | BT31 | 37274 | 150111 | ||
| Home Mines Trust Ltd | MN | 1881 | BT31 | 2868 | 15822 | |
| Homer Mining Co. Ltd | 1881 | BT31 | 2858 | 15746 | ||
| Homeward Bound Mine Ltd | 1899 | BT31 | 8585 | 62512 | ||
| Homtini Hydraulic Mines Syndicate Ltd | 1894 | BT31 | 6037 | 42676 | ||
| Honduras Copper Mining Co. Ltd | 1873 | BT31 | 1909 | 7777 | ||
| Honduras Mining Co. Ltd | 1912 | BT31 | 20640 | 121759 | ||
| Honduras Opal Mining Co. Ltd | 1868 | BT31 | 1407 | 4031 | ||
| Hope & Florida Mines Syndicate Ltd | 1892 | BT31 | 5417 | 37362 | ||
| Hope Mountain Silver Lead Mining Co. Ltd | Wrexham | Denbighshire | 1881 | BT31 | 2778 | 15164 |
| Hope Silver Lead & Copper Mining Co (Jamaica) Ltd | Jamaica | BT41 | 302 | 1754 | ||
| Hope Silver Lead & Copper Mining Co (Jamaica) Ltd | Jamaica | 1858 | BT31 | 368 | 1348 | |
| Hope Silver Lead Mining Co. Ltd | SI | 1862-1869 | BT2 | 106 | ||
| Hope Valley Mining Co. Ltd | Cornwall | 1894 | BT31 | 5755 | 40306 | |
| Hopton Mining & Minerals Co. Ltd | Hopton | Derbyshire | 1918 | BT31 | 24174 | 151388 |
| Hornachos Silver Lead Mining Co. Ltd | Spain | 1885 | BT31 | 3474 | 21047 | |
| Horse Burrow Mines Syndicate Ltd | Altarnun | Cornwall | 1905 | BT31 | 11223 | 85709 |
| Horse Island Mining Co. Ltd | Ireland | 1863 | BT31 | 778 | 420C | |
| Horsefly Valley Mining & Prospecting Syndicate Ltd | 1897 | BT31 | 7473 | 53179 | ||
| Horsley Hope Mining Co. Ltd | 1864 | BT31 | 910 | 1060C | ||
| Howard Lead Mining Co. Ltd | Wales | 1869 | BT31 | 1490 | 4595 | |
| Hubbodale Mining Co. Ltd (1877) | Chelmorton | Derbyshire | 1877 | BT31 | 2299 | 11097 |
| Hucknall Torkard Mining Tool Co. Ltd | Hucknall | Nottinghamshire | 1906 | BT31 | 33775 | 89298 |
| Hudson Bay Mountain (British Colombia) Mining Co. Ltd | 1911 | BT31 | 13670 | 117044 | ||
| Hudson Mining Co. Ltd | 1913 | BT31 | 21204 | 126891 | ||
| Huelva & San Juan Copper Co. Ltd | Spain | 1882 | BT31 | 2991 | 16828 | |
| Huelva Copper Mining Co. Ltd | Spain | BT41 | 307 | 1778 | ||
| Huelva Copper Mining Co. Ltd | Spain | 1858 | BT31 | 361 | 1321 | |
| Huesca Copper Iron & Lead Mines Ltd | 1900 | BT31 | 9081 | 67219 | ||
| Hueva Palentina Copper Mining Co. Ltd | 1879 | BT31 | 2557 | 13323 | ||
| Huinac Copper Mines Ltd | 1904 | BT31 | 10682 | 80912 | ||
| Hultafall Mining Co. Ltd | 1877 | BT31 | 2351 | 11528 | ||
| Humboldt Electric Power & Mining Co. Ltd | Nevada | U.S.A. | 1888 | BT31 | 4262 | 27637 |
| Humboldt Silver Mining Co. Ltd | Nevada | U.S.A. | 1867 | BT31 | 1344 | 3589 |
| Hungarian Bonanza Mines Ltd | Hungary | 1888 | BT31 | 4109 | 26394 | |
| Hunter Consolidated Mining Co. Ltd | 1877 | BT31 | 2353 | 11554 | ||
| Hurst Lead Mines Ltd | Marrick | Yorkshire | 1888 | BT31 | 4245 | 27508 |
| Hurst Mines Syndicate Ltd | Marrick | Yorkshire | 1890 | BT31 | 4851 | 32189 |
| Hush Eisteddfod Minera Lead Mining Co. Ltd | Minera | Denbighshire | 1876 | BT31 | 2285 | 10997 |
| Huwood Mining Machinery Ltd Plain Vol. | 1938 | BT31 | 42073 | 339485 | ||
| Hyderabad (Deccan) Co. Ltd | India | 1886 | BT31 | 31048 | 22970 | |
| Hydraulic Mining Cartridge Co. Ltd | 1911 | BT31 | 13543 | 114602 | ||
| Hydraulic Power & Smelting Co. Ltd | 1911 | BT31 | 20159 | 117141 | ||
| Hysehope Silver Lead & Barytes Mining Co. Ltd | Castleside | Durham | 1872 | BT31 | 1712 | 6208 |
