| Name | Country | Market Cap (US$) |
|---|
| C Walker & Sons Ltd | United Kingdom | Private |
| C&M Technology (Shanghai) Limited | China | Private |
| C. D. Wälzholz GmbH & Co. KG | Germany | Private |
| C. Grossmann Stahlguss GmbH | Germany | Private |
| C. Hafner GmbH & Co. | Germany | Private |
| C. Schrade GmbH | Germany | Private |
| C.A. Conduven | Venezuela | Private |
| C.B. TRAFILATI ACCIAI S.P.A. | Italy | Private |
| C.B.E | France | Private |
| C.F.F. Stainless Steels Inc | Canada | Private |
| C.G.S. SRL | Italy | Private |
| C.I. Fundicion Escobar S.A. | Colombia | Private |
| C.I.F.E. Srl | Italy | Private |
| C.I.M.A. COMPAGNIA ITALIANA MOLLE ACCIAIO SPA | Italy | Private |
| C.M. SPA | Italy | Private |
| C.M.A. CANAVERA SRL | Italy | Private |
| C.M.M. DELL'ING. DIEGO DAURI & C SNC | Italy | Private |
| C.Q.F.D | France | Private |
| C.R. S.P.A. | Italy | Private |
| C.S. ALUMINIUM CORPORATION | Taiwan | Private |
| C.S.B. CENTRO SIDERURGICO BRESCIANO SPA | Italy | Private |
| C.V.B. SRL | Italy | Private |
| C.VOGELSANG HANDEL GmbH & Co.KG. | Germany | Private |
| C.W. Carry (1967) Ltd | Canada | Private |
| CABLE & WIRELESS (IRELAND) LTD | Republic of Ireland | Private |
| Cable Manufacturing and Assembly Company, Inc. | United States | Private |
| Cable USA, Inc. | United States | Private |
| Cableries de Dour S.A. | Belgium | Private |
| Cables Ben-Mor Inc, Les | Canada | Private |
| Cables Pirelli S.A. | France | Private |
| Cables Pirelli S.A. | Spain | Private |
| CABLES Y ESLINGAS SA | Spain | Private |
| Cablesa, S.A. de C.V. | Mexico | Private |
| CABOT SUPERMETALS K.K. | Japan | Private |
| Caiec Trailer Master Co., Ltd. | China | Private |
| CAIMI EXPORT SPA | Italy | Private |
| Cairo Casting Company | Egypt | Private |
| CALDER HOLDINGS LTD | United Kingdom | Private |
| Calder Industrial Materials Ltd | United Kingdom | Private |
| Caldwell Manufacturing Co | United States | Private |
| Caldwell Tanks, Inc. | United States | Private |
| Caledonian Alloys Group Ltd | United Kingdom | Private |
| CALEDONIAN ALLOYS LTD | United Kingdom | Private |
| CALEFFI SPA | Italy | Private |
| Calgo Asia Limited | Hong Kong | Private |
| CALIBRADOS DE PRECISION SA | Spain | Private |
| CALIBRADOS PRADERA SOCIEDAD ANONIMA. | Spain | Private |
| California Amforge Corporation (Del) | United States | Private |
| California Industrial Products, Inc | United States | Private |
| California Steel Industries | United States | Private |
| Callen Manufacturing Corporation | United States | Private |
| Calstrip Industries, Inc | United States | Private |
| CALVI SPA | Italy | Private |
| Cam Tool & Die Ltd | Canada | Private |
| Camalloy, Inc | United States | Private |
| Camargo Corrêa Metais S/A. | Brazil | Private |
| Cambridge International Inc | United States | Private |
| Cambridge Tool & Manufacturing Co Inc | United States | Private |
| Cambridge, Inc | United States | Private |
| Cambridge-Lee Industries Inc | United States | Private |
| Cambridge-Lee Industries Inc. | United States | Private |
| Camcar, Llc | United States | Private |
| CAME SPA | Italy | Private |
| Camea S.A. | Argentina | Private |
| CAMEO INTERNATIONAL F Z E | United Arab Emirates | Private |
| CAMERON FRANCE | France | Private |
| CAMERON IRELAND LTD | Republic of Ireland | Private |
| Cameron Iron Works Ltd. | United States | Private |
| CAMERON ITALY SRL | Italy | Private |
| CAMOM | France | Private |
| Campbell Foundry Co | United States | Private |
| Camrose Pipe Corporation | United States | Private |
| CAMTREX LTD | United Kingdom | Private |
| Can Art Aluminum Extrusion Inc | Canada | Private |
| Canada Pipe Company Ltd | Canada | Private |
| Canadian Drawn Steel Company Inc | Canada | Private |
| Canadian Erectors Limited | Canada | Private |
| Canadian National Steel Corporation | Canada | Private |
| Canadian Reynolds Metals Company | Canada | Private |
| Canadian Shipbuilding & Engineering Ltd | Canada | Private |
| Canadian Steel Network Inc | Canada | Private |
| Canadoil Asia Limited | Thailand | Private |
| CANAVERA & AUDI SRL | Italy | Private |
| Canmac Gears & Reducers Inc | Canada | Private |
| Canmine Resources Corporation | Canada | Private |
| Cannon-Muskegon Corporation | United States | Private |
| CANTABRA DE MATRICERIA SA | Spain | Private |
| Canton Drop Forge | United States | Private |
| CAPARO ENGINEERING LTD | United Kingdom | Private |
| Caparo Group Ltd. | United Kingdom | Private |
| CAPARO MERCHANT BAR PLC | United Kingdom | Private |
| CAPARO PRECISION STRIP LTD | United Kingdom | Private |
| CAPARO PRECISION TUBES LTD | United Kingdom | Private |
| Capital Coated Steel Ltd | United Kingdom | Private |
| CAPITAL FERRO SPA | Italy | Private |
| Capital Tool & Design Limited | Canada | Private |
| CAPITANIO CAMILLO DI CONSOLARO RENATA & CAPITANIO CAMILLO SNC | Italy | Private |
| Capitol Stampings Corp | United States | Private |
| Capral Aluminium NZ Ltd. | New Zealand | Private |
| CAPRI CODEC SAS | France | Private |
|
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