| Name | Country | Market Cap (US$) |
|---|
| BLG REALISATIONS LTD | United Kingdom | Private |
| Bliss & Laughlin Indus. | United States | Private |
| Block And Company, Inc. | United States | Private |
| Block Heavy & Highway Products Co | United States | Private |
| Block Industries, Inc | United States | Private |
| Bloomsburg Metal Company | United States | Private |
| Blount Inc | United States | Private |
| BLUESCOPE STEEL (AIS) PTY. LTD. | Australia | Private |
| BLUESCOPE STEEL ASIA PTE LTD | Singapore | Private |
| Bluewater Thermal Processing Llc | United States | Private |
| Bluff City Steel Llc | United States | Private |
| Blum Inc | United States | Private |
| Blume Stahlservice GmbH | Germany | Private |
| Blumenstock Baustahlservice GmbH | Germany | Private |
| BMC Industries, Inc. | United States | Private |
| Bmg Metall Und Recycling Gmbh | Austria | Private |
| BMG Metals, Inc. | United States | Private |
| Bmi, Inc | United States | Private |
| BMP MANFREDONIA SPA | Italy | Private |
| BMP Metals Inc | Canada | Private |
| Boa AG | Switzerland | Private |
| Boal Belgium NV | Belgium | Private |
| BOAL U.K. LTD | United Kingdom | Private |
| Boatman's Trident Pipe & Equipment | United States | Private |
| Bobco Metals, LLC | United States | Private |
| Bochumer Verein Verkehrstechnik GmbH | Germany | Private |
| BODALEX EXTRUSION SA | Spain | Private |
| Bode-Panzer GmbH | Germany | Private |
| Bode-Panzer s.r.o. | Czech Republic | Private |
| BODEGA G. E C. SPA | Italy | Private |
| Bodine Aluminum Inc | United States | Private |
| BODYCOTE HEAT TREATMENTS LTD | United Kingdom | Private |
| Bodycote Hit | France | Private |
| Bodycote International Inc | United States | Private |
| Bodycote Lindberg Corporation | United States | Private |
| Bodycote North America, Inc | United States | Private |
| Bodycote Thermal Processing, Inc | United States | Private |
| Bodycote Thermotreat AB | Sweden | Private |
| Bodycote Värmebehandling AB | Sweden | Private |
| Bodycote Wärmebehandlung GmbH | Germany | Private |
| BoergWarner Transmission Systems Korea Inc. | South Korea | Private |
| Bogner Edelstahl Gesellschaft m.b.H. | Austria | Private |
| Bohle Ag | Germany | Private |
| Böhler AG | Germany | Private |
| Böhler International GmbH | Austria | Private |
| BÖHLER Schmiedetechnik GmbH & Co KG | Austria | Private |
| BOHLER UDDEHOLM (AUSTRALIA) PTY LTD | Australia | Private |
| BOHLER UDDEHOLM FRANCE | France | Private |
| Bohler Uddeholm Ltd | Canada | Private |
| Bohler-Uddeholm AG | Austria | Private |
| Bohler-Uddeholm Corporation | United States | Private |
| Böhler-Uddeholm Precision Strip AB | Sweden | Private |
| BÖHLER-UDDEHOLM Precision Strip GmbH & Co KG | Austria | Private |
| Bohler-Uddeholm Services, Llc | United States | Private |
| BÖHLERSTAHL Vertriebsgesellschaft m.b.H. | Austria | Private |
| Bohn Aluminum Inc | United States | Private |
| Boiler Tube Company America | United States | Private |
| Boliden Bergsoe A/S | Denmark | Private |
| Boliden Bergsöe AB | Sweden | Private |
| Boliden Commercial AB | Sweden | Private |
| Boliden Harjavalta Oy | Finland | Private |
| Boliden Kokkola Oy | Finland | Private |
| Boliden Odda AS | Norway | Private |
| Böllhoff GmbH | Germany | Private |
| BOLLHOFF OTALU SA | France | Private |
| Böllhoff Produktion GmbH & Co. KG | Germany | Private |
| Bollhoff Service Center Ltda. | Brazil | Private |
| BOLLINGHAUS PORTUGAL - AÇOS ESPECIAIS, S.A. | Portugal | Private |
| BOLMET S A | Poland | Private |
| BOLTON MKM LTD | United Kingdom | Private |
| Bon Chef, Inc. | United States | Private |
| Bon L Canada Inc | Canada | Private |
| Bone Steel Ltd | United Kingdom | Private |
| Bonelli y Cia. Fortunato S.A. | Argentina | Private |
| Bonmartin | France | Private |
| BONMARTIN SA | France | Private |
| BONOMI METALLI SPA A SOCIO UNICO | Italy | Private |
| Bontaz Centre | France | Private |
| BONTEMPI VIBO SPA | Italy | Private |
| BOOLE'S TOOLS & PIPE FITTINGS LTD | United Kingdom | Private |
| Boon Edam B.V. | Netherlands | Private |
| BORBET SA (PTY) LTD | South Africa | Private |
| Borcelik Celik Sanayi Ticaret A S | Turkey | Private |
| BORCELIK CELIK SANAYII TICARET A S | Turkey | Private |
| Border Steel, Inc. | United States | Private |
| Bore Samson Group Ltd | United Kingdom | Private |
| Borg Indak Inc. | United States | Private |
| BORGHI IMPIANTI OLEODINAMICI SPA | Italy | Private |
| BORNAY S.A. | Spain | Private |
| Borusan Holding AS | Turkey | Private |
| BORUSAN MANNESMANN VOBARNO TUBI SPA | Italy | Private |
| BOS GmbH | Germany | Private |
| BOSSINI SPA | Italy | Private |
| Bosta B.V. | Netherlands | Private |
| BOSTLAN SA | Spain | Private |
| Bott Ltd | United Kingdom | Private |
| Bouffard Metal Goods, Inc. | United States | Private |
| BOURGEAT | France | Private |
| BOVAS Vasipari Szovetkezet | Hungary | Private |
| BOWIM S A | Poland | Private |
|
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