| ASAmazing Steel | Montclair | CA | — | ◇ UNVERIFIED |
| ASAmazing Steel CORP Dba Amazing Hydraulics Dba Mitc | Montclair | CA | — | ◇ UNVERIFIED |
| ABAmbassador Bridge & Paving Supply LLC | Bourbonnais | IL | — | ◇ UNVERIFIED |
| ASAmbassador Steel Corporation | Newton | IA | — | ◇ UNVERIFIED |
| ASAmbassador Steel Fabrication, LLC | Marion | OH | — | ◇ UNVERIFIED |
| ACA.m. Castle & CO. | Wichita | KS | — | ◇ UNVERIFIED |
| ASAmco Steel Fabrication, LLC | Elmendorf | TX | — | ◇ UNVERIFIED |
| AMAmdex Metalizing | Scottdale | PA | — | ◇ UNVERIFIED |
| ABAmerican Block Company | Houston | TX | — | ◇ UNVERIFIED |
| ACAmerican Constructioneers, LLC | Tampa | FL | — | ◇ UNVERIFIED |
| ACAmerican Custom Metal Fabricating, INC. | Green Bay | WI | — | ◇ UNVERIFIED |
| AEAmerican Equipment | Victorville | CA | — | ◇ UNVERIFIED |
| AFAmerican Fabricated Metals, Incorporated | Colonial Heights | VA | — | ◇ UNVERIFIED |
| AHAmerican Highway Technology | Riverbank | CA | — | ◇ UNVERIFIED |
| AIAmerican Industrial Plant Services, INC. | Geismar | LA | — | ◇ UNVERIFIED |
| AMAmerican Machine & Conveyor CORP | Oxnard | CA | — | ◇ UNVERIFIED |
| AMAmerican Manufacturing Operations INC. | Toledo | OH | — | ◇ UNVERIFIED |
| AMAmerican Metal Fabricators | Modesto | CA | — | ◇ UNVERIFIED |
| AMAmerican Metals | West Sacramento | CA | — | ◇ UNVERIFIED |
| AMAmerican Metals | Fresno | CA | — | ◇ UNVERIFIED |
| AMAmerican Modular Systems, INC. | Manteca | CA | — | ◇ UNVERIFIED |
| ASAmerican Steel Corporation | Apache Junction | AZ | — | ◇ UNVERIFIED |
| ASAmerican Steel Fabricators, INC. | Melrose Park | IL | — | ◇ UNVERIFIED |
| ASAmerican Striking Tool, Inc | Wilmington | NC | — | ◇ UNVERIFIED |
| ASAmerican Structures and Design INC. | Sumner | WA | — | ◇ UNVERIFIED |
| ATAmerican Tower Corporation | Somerdale | NJ | — | ◇ UNVERIFIED |
| ATAmerican Tower Corporation | Mount Wilson | CA | — | ◇ UNVERIFIED |
| AWAmerican Warehouse Equipment I | North Hollywood | CA | — | ◇ UNVERIFIED |
| AMAmerifab Mfg LLC | Deer Island | OR | — | ◇ UNVERIFIED |
| AMA M L Simon INC | West Orange | NJ | — | ◇ UNVERIFIED |
| AMA & M Ornamental Iron | Corona | CA | — | ◇ UNVERIFIED |
| AMA.m.w. Metal Works CORP | Hawthorne | NJ | — | ◇ UNVERIFIED |
| AEAnchor Enterprises | Blades | DE | — | ◇ UNVERIFIED |
| AIAndersen Industries - Adelanto | Adelanto | CA | — | ◇ UNVERIFIED |
| ACAnderson Charnesky Structural Steel INC | Yucaipa | CA | — | ◇ UNVERIFIED |
| ACAnderson Charnesky Structural Steel, INC. | Beaumont | CA | — | ◇ UNVERIFIED |
| AWAnderson Welding LLC | Dover | NH | — | ◇ UNVERIFIED |
| ACAnderton Casting LLC | Troy | TX | — | ◇ UNVERIFIED |
| ABAndrew B. Duffy, INC. | West Deptford | NJ | — | ◇ UNVERIFIED |
| AMAndy Maylish Fabrication INC. | Denver | NC | — | ◇ UNVERIFIED |
| ACAnel Corporation | Carroll County | MS | — | ◇ UNVERIFIED |
| AGAngell & Giroux INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| AAAnn Arbor Fabrication INC | Dexter | MI | — | ◇ UNVERIFIED |
| AIAnnco Industrial Metal Fabricator | Wallington | NJ | — | ◇ UNVERIFIED |
| AIAnnco Industrial Metal Fabricator | Totowa | NJ | — | ◇ UNVERIFIED |
| AMAnsam Metals CORP | Baltimore | MD | — | ◇ UNVERIFIED |
| ASAnthem Steel Group Inc | Salt Lake City | UT | — | ◇ UNVERIFIED |
| AMAntietam Metals, LLC | Williamsport | MD | — | ◇ UNVERIFIED |
| ACAnvil Craft Corporation | Easton | PA | — | ◇ UNVERIFIED |
| ASAnvil Steel Engineering Inc. | Taunton | MA | — | ◇ UNVERIFIED |
| AMAnzaldua Mechanical, INC. | Harlingen | TX | — | ◇ UNVERIFIED |
| AFApex Fabrication, INC. | Macclenny | FL | — | ◇ UNVERIFIED |
| ACApnivex CORP Dba Comm-fab | Chino | CA | — | ◇ UNVERIFIED |
| ASApollo Steel CORP. | Niagara Falls | NY | — | ◇ UNVERIFIED |
| AEApplied Energy Technologies, INC. | Maumee | OH | — | ◇ UNVERIFIED |
| AIAqua-Doc International, LTD. | Big Bend | WI | — | ◇ UNVERIFIED |
| ACAquamatic Cover Systems | Gilroy | CA | — | ◇ UNVERIFIED |
| ASAquaturbo Systems, INC | Springdale | AR | — | ◇ UNVERIFIED |
| APAransas Pass Site | Aransas Pass | TX | — | ◇ UNVERIFIED |
| ASArcadia Security and Patrol | Vancouver | WA | — | ◇ UNVERIFIED |
| AMArchitectural Metal Solutions | Austell | GA | — | ◇ UNVERIFIED |
| ASArchitectural Steel & Aluminum Products, INC. | Dallas | GA | — | ◇ UNVERIFIED |
| ASArchitectural & Structural Steel Co, INC | Santa Rosa | CA | — | ◇ UNVERIFIED |
| AIArclight Industries LLC | Venetia | PA | — | ◇ UNVERIFIED |
| AWArcosa Wind Towers, INC. - Newton | Newton | IA | — | ◇ UNVERIFIED |
| AIArc-rite, INC. | Palatka | FL | — | ◇ UNVERIFIED |
| ASArc Services | Roseville | MN | — | ◇ UNVERIFIED |
| ARA & R Iron Works, INC. | Conshohocken | PA | — | ◇ UNVERIFIED |
| AMAristotle Metal Works | Lawrenceville | GA | — | ◇ UNVERIFIED |
| AEArizona Equipment Fabrication L.l.c. | Flagstaff | AZ | — | ◇ UNVERIFIED |
| AIArlington Iron Works | Manassas | VA | — | ◇ UNVERIFIED |
| ASArmetco Systems LLC | Fort Worth | TX | — | ◇ UNVERIFIED |
| ACArt Chiapa Welding | Porterville | CA | — | ◇ UNVERIFIED |
| AFArtisanz Fabrication | Plainfield | IN | — | ◇ UNVERIFIED |
| ASAsap Steel | Warren | MI | — | ◇ UNVERIFIED |
| AVAsa V. Peugh, INC. | Seaford | DE | — | ◇ UNVERIFIED |
| AIAshworth Industries, L.l.c. | Prairieville | LA | — | ◇ UNVERIFIED |
| AWAspen Welding LLC | Rifle | CO | — | ◇ UNVERIFIED |
| ASAsp Services INC. | Selinsgrove | PA | — | ◇ UNVERIFIED |
 Associated Steel Fabricators INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| Associated Steel Fabricators, INC. | Houston | TX | — | ◇ UNVERIFIED |
| ASAssociated Steel Workers Fabrication Shop | Kapolei | HI | — | ◇ UNVERIFIED |
| AOAssurance Operations Corporation | Lawrenceburg | TN | — | ◇ UNVERIFIED |
| APATD Properties, LLC | Pioneer | OH | — | ◇ UNVERIFIED |
| ABAtlantic Bolt, Incorporated | Charlotte | NC | — | ◇ UNVERIFIED |
| AEAtlantic Enterprises | Holly Hill | FL | — | ◇ UNVERIFIED |
| AFAtlas Fabrication,inc. | Abbeville | LA | — | ◇ UNVERIFIED |
| AIAuburn Industries | Auburn Hills | MI | — | ◇ UNVERIFIED |
 Aura Fabricators Inc | Fergus Falls | MN | — | ◇ UNVERIFIED |
| AEAvalos Enterprises INC. | New Plymouth | ID | — | ◇ UNVERIFIED |
| ASAzad Steel, INC. | North Hollywood | CA | — | ◇ UNVERIFIED |
| AIAztec Industries, INC. | Humble | TX | — | ◇ UNVERIFIED |
| BABaader and Johnson Equipment | Kansas City | KS | — | ◇ UNVERIFIED |
| BEBaco Enterprises, Inc. | Bronx | NY | — | ◇ UNVERIFIED |
| BCBadlands Capital Holdings LLC | Springtown | TX | — | ◇ UNVERIFIED |
| BCBaldwin Custom Welding & Designs LLC | Bend | OR | — | ◇ UNVERIFIED |
| BCBaldwin Custom Welding & Designs LLC | Bend | OR | — | ◇ UNVERIFIED |
 Baltimore Fabrication, LLC | Baltimore | MD | — | ◇ UNVERIFIED |
| BSBambacigno Steel Company INC | Modesto | CA | — | ◇ UNVERIFIED |
| BMBanks Manufacturing Company | Grafton | OH | — | ◇ UNVERIFIED |
