| Name | Country | Market Cap (US$) |
|---|
| "Filli" Stahlgroßhandelsgesellschaft m.b.H. | Austria | Private |
| "Würth" Handelsgesellschaft m.b.H. | Austria | Private |
| 120947 Washington Inc | United States | Private |
| 7M Metallhandelsgesellschaft m.b.H. | Austria | Private |
| A FORGED TOOL SA | Spain | Private |
| A Raymond Et Cie | France | Private |
| A Stevens & Co SA | Belgium | Private |
| A W Champion Ltd | United Kingdom | Private |
| A&I Bolt And Nut Inc. | United States | Private |
| A. Klaassen B.V. | Netherlands | Private |
| A. M. Leonard, Inc. | United States | Private |
| A. O. Smith Water Products Company | United States | Private |
| A.A.A. TASSA LTD. | Israel | Private |
| A/S Chr. Boldsen | Denmark | Private |
| ABN PIPE ABASTECIMIENTOS S.A. | Spain | Private |
| Abus (Hong Kong) Limited | Hong Kong | Private |
| Accuride International, Inc. | United States | Private |
| Acme Construction Supply Co Inc | United States | Private |
| Action Bolt & Tool Co | United States | Private |
| Adolf Pfeiffer GmbH | Germany | Private |
| Adolf Schween Baubeschläge und Bauzubehör GmbH | Germany | Private |
| Aero-Space Southwest, Inc. | United States | Private |
| Agencia La Mundial S.A. de C.V. | Honduras | Private |
| AGI GLASS (PTY) LTD | South Africa | Private |
| Agri-Starts, Inc. | United States | Private |
| Agrifirm Winkel B.V. | Netherlands | Private |
| Ahlsell Danmark ApS | Denmark | Private |
| AIRLAN SA | Spain | Private |
| Aironware (Shanghai) Co.,Ltd. | China | Private |
| Aktieselskabet P. Hatten & Co | Denmark | Private |
| AL OTHMAN INDUSTRIAL MARKETING CO | Saudi Arabia | Private |
| AL TOUKHI COMPANY FOR INDUSTRY AND TRADING LTD | Saudi Arabia | Private |
| Alaska Industrial Hardware, Inc. | United States | Private |
| ALBA SIDERURGICA SRL | Italy | Private |
| Albema Helmond B.V. | Netherlands | Private |
| ALCOA FASTENING SYSTEMS LTD | United Kingdom | Private |
| ALCUFER Ipari Kereskedelmi es Szolgaltato Korlatolt Felelossegu | Hungary | Private |
| Alfred L Schiller Hardware Inc | United States | Private |
| ALFRIC INTERIORS LTD | United Kingdom | Private |
| Algemene Handelsonderneming Bo-Mij B.V. | Netherlands | Private |
| ALINSA SUMINISTROS PARA INSTALACIONES SL | Spain | Private |
| All State Fastener Corporation | United States | Private |
| Allegis Corporation | United States | Private |
| Allen & Allen Company | United States | Private |
| Alloy Fasteners, Inc. | United States | Private |
| Almacenes Boyaca, S.A. | Ecuador | Private |
| ALMACENES VALVERDE E HIJOS SL | Spain | Private |
| ALQUIBALAT SL | Spain | Private |
| Amdura Corporation | United States | Private |
| American & Bolt Screw Mfg. Corp. | United States | Private |
| American Fasteners, Inc. | United States | Private |
| American Innovative Manufacturing Corp | United States | Private |
| American Kal Enterprises, Inc | United States | Private |
| Ample Supply Company | United States | Private |
| Andersen & Nielsen A/S | Denmark | Private |
| Andreas STIHL, spol. s r. o. | Czech Republic | Private |
| ANDRETY | France | Private |
| ANDREU I MIRIAM SA | Spain | Private |
| ANIXTER ITALIA SRL | Italy | Private |
| ANJAC BI | France | Private |
| ANN YAK SIONG HARDWARE SDN BHD | Malaysia | Private |
| ANTONIO CAPALDO SPA | Italy | Private |
| ANTZOULATOS CONSTANTINE N. E.E. | Greece | Private |
| APEX STAINLESS FASTENERS LTD | United Kingdom | Private |
| APPLIED BUSINESS SYSTEMS SDN BHD | Malaysia | Private |
| Applied Industrial Technologies-Tx Lp | United States | Private |
| AQUA TREND O.K. spol. s r. o. | Czech Republic | Private |
| ARC DISTRIBUCION ARTE PARA EL HOGAR IBERICA SL. | Spain | Private |
| ArcelorMittal - Stainless Service Switzerland AG | Switzerland | Private |
| ArcelorMittal Staalhandel Holding B.V. | Netherlands | Private |
| ArcelorMittal Steel Coat Europe SA | Belgium | Private |
| Argos Limited | United Kingdom | Private |
| ARISTON THERMO ESPANA SL. | Spain | Private |
| Arkada-M OOO | Russia | Private |
| Arrow Lock Manufacturing (Canada) Inc | Canada | Private |
| Artmark Products Corp | United States | Private |
| Arvid Nilsson A/S | Denmark | Private |
| ASS-2 OOO | Russia | Private |
| Assa Abloy Of Canada Ltd | Canada | Private |
| Assembly Component Systems, Inc. | United States | Private |
| ASTORI SPA | Italy | Private |
| ATOM SUPPLY GROUP PTY LIMITED | Australia | Private |
| ATUSA GRUPO EMPRESARIAL, S.A. | Spain | Private |
| AU FORUM DU BATIMENT | France | Private |
| Aug. Hülden GmbH + Co. KG | Germany | Private |
| Austin Hardware & Supply, Inc. | United States | Private |
| Automatic Rain Company | United States | Private |
| Axiom, Inc | United States | Private |
| B B I T Inc | United States | Private |
| B. Vomberg GmbH & Co KG | Germany | Private |
| B.V.Internationale Staalwaren Export Maatschappij "instalex" | Netherlands | Private |
| Baer Supply Co. | United States | Private |
| Baier & Michels GmbH & Co. KG | Germany | Private |
| BAILLY QUAIREAU | France | Private |
| BÄKO Erzgebirge/Vogtland Genossenschaft des Bäcker- Konditoren- | Germany | Private |
| Baltimore Door & Frame Company Inc. | United States | Private |
| BARADEL INVESTMENTS PTY. LTD. | Australia | Private |
| Bates Sons & Daughters, Inc. | United States | Private |
| BAUMALU | France | Private |
| BAWA SP Z O O | Poland | Private |
|
