| Name | Country | Market Cap (US$) |
|---|
| RENISON BELL LIMITED | Australia | Private |
| RENISON LIMITED | Australia | Private |
| Repadre Capital Corporation | Canada | Private |
| Republic Goldfields, Inc. | Canada | Private |
| Reserve Industries | United States | Private |
| Reunion Mining Ltd | United Kingdom | Private |
| Reunion Mining plc | United Kingdom | Private |
| Rex Mining Corp | South Africa | Private |
| Rhein-Umschlag GmbH & Co. KG | Germany | Private |
| Rheinische Baustoffwerke Gmbh | Germany | Private |
| Rheinische Provinzial-Basalt- und Lavawerke GmbH & Co. oHG | Germany | Private |
| Rhiem & Sohn Kies und Sand GmbH & Co. KG | Germany | Private |
| Rhonda Corp | Canada | Private |
| RHONE DURANCE GRANULATS | France | Private |
| Rich Coast Resources Ltd. | Canada | Private |
| Richmont Corporation | United States | Private |
| Riddarhyttan Resources AB | Sweden | Private |
| Rider Resources Ltd. | Canada | Private |
| Rigips Austria GesmbH. | Austria | Private |
| RimPac Resources Ltd. | United States | Private |
| Rinker Materials, Inc | United States | Private |
| Rio Algom Limited | Canada | Private |
| Rio Algom Mining Llc | United States | Private |
| Rio Capim Caulim S/A. | Brazil | Private |
| Rio Narcea Gold Mines Ltd. | Canada | Private |
| RIO NARCEA GOLD MINES SA | Spain | Private |
| Rio Paracatu Mineraçao S/A. | Brazil | Private |
| Rio Tinto (Commercial Paper) Limited | Australia | Private |
| Rio Tinto America, Inc. | United States | Private |
| Rio Tinto Canada, Inc. | Canada | Private |
| Rio Tinto Finance Limited | Australia | Private |
| Rio Tinto Finance Overseas Ltd. | United Kingdom | Private |
| Riverstone Group, Inc. | United States | Private |
| RNC Gold Inc. | Canada | Private |
| Road Builders & Parkway Construction Llc | United States | Private |
| ROADSTONE DUBLIN LTD | Republic of Ireland | Private |
| ROADSTONE EXPORTS LTD | Republic of Ireland | Private |
| ROBA Baustoff GmbH | Germany | Private |
| Roba Metals B.V. | Netherlands | Private |
| Robert Brett & Sons Limited | United Kingdom | Private |
| Robinson Nevada Mining Company | United States | Private |
| ROCAMAT PIERRE NATURELLE | France | Private |
| ROCAS EUROPEAS DE CONSTRUCCION SA | Spain | Private |
| Röfix AG | Austria | Private |
| RONEZ LTD | United Kingdom | Private |
| Round Mountain Gold Corporation | United States | Private |
| Royal Bafokeng Holdings (Pty) Ltd | South Africa | Private |
| Royal Oak Ventures Inc. | Canada | Private |
| RSR Corporation | United States | Private |
| RTB BOR HOLDING D O O | Yugoslavia | Private |
| RUBIERA SA FORJADOS Y CUBIERTAS | Spain | Private |
| Rudus Murskaus Oy | Finland | Private |
| RUSSKAYA GORNO-RUDNAYA KOMPANIYA OOO | Russia | Private |
| Rustenburg Platinum Mines Ltd | South Africa | Private |
| Rutgers AG | Germany | Private |
| RYUSHIN KOGYO K.K. | Japan | Private |
| S & B Industrial Minerals S.A. | Greece | Private |
| S.E.I. SOCIETA' ESCAVAZIONE INERTI SPA | Italy | Private |
| Sabena Ltd | Australia | Private |
| Sächsische Sandsteinwerke GmbH | Germany | Private |
| SAFOND SABBIE DA FONDERIA SRL | Italy | Private |
| SAGAMI KOGYO K.K. | Japan | Private |
| Sainik Mining and Allied Services Limited | India | Private |
| Saint-Gobain Weber Terranova Epitoanyagipari Korlatolt Felelosse | Hungary | Private |
| Sales del Istmo, S.A. de C.V. | Mexico | Private |
| SALGAOCAR MINING INDUSTRIES PRIVATE LIMITED | India | Private |
| Salinen Austria Aktiengesellschaft | Austria | Private |
| Salt Union Ltd | United Kingdom | Private |
| Salzburger Sand- und Kieswerke Gesellschaft m.b.H. | Austria | Private |
| Sama Mineraçao de Amianto Ltda. | Brazil | Private |
| Samancor Ltd | South Africa | Private |
| SAMANCOR LTD | South Africa | Private |
| Samarco Mineracao S.A. | Brazil | Private |
| Samarco Mineraçao S/A. | Brazil | Private |
| SAMAX RESOURCES LTD | United Kingdom | Private |
| San Rafael Rock Quarry Inc | United States | Private |
| Sand- och Grus AB Jehander | Sweden | Private |
| Sand- und Kieswerk Karlstadt Benkert KG | Germany | Private |
| SANEI SILICA, K.K. | Japan | Private |
| SANOFI-SYNTHELABO IRELAND LTD | Republic of Ireland | Private |
| Santa Elina Gold Corporation | United States | Private |
| Santa Fe Pacific Gold Corporation | United States | Private |
| Sao Bento Mineraçao S/A. | Brazil | Private |
| SARDA SILICATI S.R.L. | Italy | Private |
| Sargold Resource Corporation | Canada | Private |
| Sauquoit Industries, Inc. | United States | Private |
| Savage Resources | Australia | Private |
| SAW Schleswiger Asphaltsplitt-Werke GmbH & Co. KG | Germany | Private |
| Scandinavian Minerals Ltd | Canada | Private |
| ScanMining AB | Sweden | Private |
| Scarborough Minerals Plc | United Kingdom | Private |
| Schott Lithotec Ag | Germany | Private |
| Schotter- und Betonwerk Karl Schwarzl Betriebsgesellschaft m.b.H | Austria | Private |
| Sdad Mineira Neves Corvo (SOMINCOR) | Portugal | Private |
| Searles Valley Minerals Operations, Inc | United States | Private |
| Sedimentary Holdings Ltd | Australia | Private |
| SEIBU KENZAI K.K. | Japan | Private |
| SEISHIN SANGYO K.K. | Japan | Private |
| SELF SHA, K.K. | Japan | Private |
| Selwyn Mines Ltd | Australia | Private |
|
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