| AKA & K Machine & Fab Shop, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| AMAlabama Metal Industries CORP | Bourbonnais | IL | — | ◇ UNVERIFIED |
| AOAlameda Ornamental Iron | Denver | CO | — | ◇ UNVERIFIED |
| ASAlbany Steel INC | Albany | NY | — | ◇ UNVERIFIED |
| ALAlfa Laval Heat Plt | Lykens | PA | — | ◇ UNVERIFIED |
| AIAllen Iron Works and Supply, INC. | Tarrant | AL | — | ◇ UNVERIFIED |
| AMAllied Metal Industries INC | Newark City | NJ | — | ◇ UNVERIFIED |
| ASAllied Steel CO INC | Riverside | CA | — | ◇ UNVERIFIED |
| AMAll Metal Recycling INC | Springfield | MO | — | ◇ UNVERIFIED |
| ACAlloy Custom Products LLC | Delphi | IN | — | ◇ UNVERIFIED |
| AFAlloy Fabrication INC | Reading | PA | — | ◇ UNVERIFIED |
| ASAllstate Steel CO | Jacksonville | FL | — | ◇ UNVERIFIED |
| ASAll Steel Construction-malvern Facility | Malvern | AR | — | ◇ UNVERIFIED |
 Alonso & Carus Iron Works INC | Catano | PR | — | ◇ UNVERIFIED |
| ASAlpine Steel Fabricators | Colorado Springs | CO | — | ◇ UNVERIFIED |
| AIAlply INC | De Kalb | MS | — | ◇ UNVERIFIED |
| ASAlro Steel INC (1431154016) | Cincinnati | OH | — | ◇ UNVERIFIED |
| APAlstom Power INC | Easton | PA | — | ◇ UNVERIFIED |
| AIAltrachem INC | Joliet | IL | — | ◇ UNVERIFIED |
| ABAmer Bridge Holding Co/coraopolis | Coraopolis | PA | — | ◇ UNVERIFIED |
| ABAmerican Boiler Works | Arlington | WA | — | ◇ UNVERIFIED |
| ACAmerican Cargo Group Trailers LLC Pa Div | Mcadoo | PA | — | ◇ UNVERIFIED |
 American Fabrication Site | Idaho Falls | ID | — | ◇ UNVERIFIED |
| AIAmerican Idustrial Fabricators INC | Saint Amant | LA | — | ◇ UNVERIFIED |
| ACAmeristeel CORP | Plant City | FL | — | ◇ UNVERIFIED |
| ASAmeron Steel Fabrication Division | Fontana | CA | — | ◇ UNVERIFIED |
| ARAmg Resources CORP | Youngstown | OH | — | ◇ UNVERIFIED |
| AAmico-lakeland | Lakeland | FL | — | ◇ UNVERIFIED |
| ASAnderson Silver Plating CO INC | Elkhart | IN | — | ◇ UNVERIFIED |
| AMAngelini Metal Works | Hialeah | FL | — | ◇ UNVERIFIED |
| AFApex Fabrication & Design INC | Boyertown | PA | — | ◇ UNVERIFIED |
| AHApi Heat Transfer INC | Arcade | NY | — | ◇ UNVERIFIED |
| ARArcher Road Imports | Gainesville | FL | — | ◇ UNVERIFIED |
| AMArchitechtural Metal, INC | Santa Fe | NM | — | ◇ UNVERIFIED |
| ARArchitectural Rails INC | Panama City | FL | — | ◇ UNVERIFIED |
| ASArchitectural Specialty Products INC | Chicago | IL | — | ◇ UNVERIFIED |
| ALArcron LLC | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| ARA & R Ironworks | Tucker | GA | — | ◇ UNVERIFIED |
| AIArtistic Iron Works | Des Moines | IA | — | ◇ UNVERIFIED |
| AQAscension Quality Materials LLC - Prairieville Plant | Prairieville | LA | — | ◇ UNVERIFIED |
| AIAsc, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| ASAshley Steel, INC. | N Charleston | SC | — | ◇ UNVERIFIED |
| AIAs-tech Industries INC | Warren | MI | — | ◇ UNVERIFIED |
| ASAstralloy Steel Products INC | Masury | OH | — | ◇ UNVERIFIED |
| ACAtlas Copco Hurricane LLC | Franklin | IN | — | ◇ UNVERIFIED |
 Atlas Industrial Holdings, Lle (0125042240) | Columbus | OH | — | ◇ UNVERIFIED |
| Atlas Industrial Manufacturing | Clifton City | NJ | — | ◇ UNVERIFIED |
| APAy-mac Precision | Windsor | CO | — | ◇ UNVERIFIED |
| BABabcock and Wilcox Company | West Point | MS | — | ◇ UNVERIFIED |
| BSBae Systems Container Solutions, INC. | Berthoud | CO | — | ◇ UNVERIFIED |
