| BSBuilders Steel Company | Overland Park | KS | — | ◇ UNVERIFIED |
| BSBuilders Steel INC / 1924 S 49th W Ave Steel Fab Shop | Tulsa | OK | — | ◇ UNVERIFIED |
| BBBuilding Blocks | Merritt Island | FL | — | ◇ UNVERIFIED |
| BEBuilding Envelope Systems | Plainville | MA | — | ◇ UNVERIFIED |
| BWBulldog Welding and Specialties LLC | The Dalles | OR | — | ◇ UNVERIFIED |
| BRBull Run Machine & Wldg Co* | Knoxville | TN | — | ◇ UNVERIFIED |
| BPBullseye Products International, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| BBBurbank Barrel & Drum INC | Houston | TX | — | ◇ UNVERIFIED |
| BABurke and Company, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| BIBurlingame Indust. INC Dba Eagle Roofing Products | Rialto | CA | — | ◇ UNVERIFIED |
| BWBurlington Wilbert Vault Works, INC. | Burlington | IA | — | ◇ UNVERIFIED |
| BMBurn's Monument Company | Perry | FL | — | ◇ UNVERIFIED |
| BTBurrell Tri Cnty Vaults INC | Ypsilanti | MI | — | ◇ UNVERIFIED |
| BIBusby International | Moses Lake | WA | — | ◇ UNVERIFIED |
| BIBusch Iron & Steel CO INC | Knoxville | TN | — | ◇ UNVERIFIED |
| BCBush Concrete Products INC | Muskegon | MI | — | ◇ UNVERIFIED |
| BIBushnell Illinois Tank CO. D/b/a Schuld/bushnell | Valley | NE | — | ◇ UNVERIFIED |
| BCButler Compressor Ii | Carson | CA | — | ◇ UNVERIFIED |
| BWB & W Manufacturing Company | Tulsa | OK | — | ◇ UNVERIFIED |
| CFC3 Foam & Precast Inc | Orlando | FL | — | ◇ UNVERIFIED |
| CWC4 Welding INC | Sauk Rapids | MN | — | ◇ UNVERIFIED |
| CMC5 Manufacturing LLC | Kingman | KS | — | ◇ UNVERIFIED |
| CMCactus Metalworks INC. | Hesperia | CA | — | ◇ UNVERIFIED |
| CVCactus Varied Industries LLC | Amarillo | TX | — | ◇ UNVERIFIED |
| COCadillac Ornamental Iron Mfg | Oxford | MI | — | ◇ UNVERIFIED |
| CWCad Works INC | La Puente | CA | — | ◇ UNVERIFIED |
| CMCajah's Machine - Flexible Products, LLC | Lenoir | NC | — | ◇ UNVERIFIED |
| CCCajun Crete LLC | Minden | LA | — | ◇ UNVERIFIED |
| CICalbrandt INC | Delano | MN | — | ◇ UNVERIFIED |
| CCCal Coast Manufacturing INC | Turlock | CA | — | ◇ UNVERIFIED |
| CCCalculated Custom Metal Works LLC | Oakwood Village | OH | — | ◇ UNVERIFIED |
| CCCal Customs Fabrications LLC | Bakersfield | CA | — | ◇ UNVERIFIED |
| CICaledonia INC. | Waterford | VT | — | ◇ UNVERIFIED |
| CCalfabco | South El Monte | CA | — | ◇ UNVERIFIED |
| CBCalifornia Blow Pipe | Paramount | CA | — | ◇ UNVERIFIED |
| CDCalifornia Dolly & Supply INC | Union City | CA | — | ◇ UNVERIFIED |
| CECalifornia Expanded Metals Products CO | Pittsburg | CA | — | ◇ UNVERIFIED |
| CSCalifornia Steel Stair & Rail | Manteca | CA | — | ◇ UNVERIFIED |
| CCCalvert City Marine Works LLC | Calvert City | KY | — | ◇ UNVERIFIED |
| CECal-vista Erosion Products | Arbuckle | CA | — | ◇ UNVERIFIED |
| CACamblin at 2257, LLC | Rialto | CA | — | ◇ UNVERIFIED |
| CSCamblin Steel Service, Inc. | Rocklin | CA | — | ◇ UNVERIFIED |
| CSCamblin Steel Service, Inc. | Phoenix | AZ | — | ◇ UNVERIFIED |
| CSCamblin Steel Service, INC | Sacramento | CA | — | ◇ UNVERIFIED |
| CPCambridge Press | Somerville | MA | — | ◇ UNVERIFIED |
| CMCamelot Metals | Blaine | MN | — | ◇ UNVERIFIED |
| CUCami USA INC | Roswell | NM | — | ◇ UNVERIFIED |
| CACampbell and Shaw Steel INC | Marysville | MI | — | ◇ UNVERIFIED |
| CSCampbell & Shaw Steel INC | Detroit | MI | — | ◇ UNVERIFIED |
| CFCamryn Fabrication Dba Pro Weld LLC | Chesterfield | MI | — | ◇ UNVERIFIED |
| CMCamtech Manufacturing Solutions LLC | Science Hill | KY | — | ◇ UNVERIFIED |
| CWCanron Western Constructors INC | Portland | OR | — | ◇ UNVERIFIED |
| CSCanyon Stone | Lenexa | KS | — | ◇ UNVERIFIED |
| CCapa | Penitas | TX | — | ◇ UNVERIFIED |
| CFCape Fear Precast, LLC | Jacksonville | NC | — | ◇ UNVERIFIED |
| CFCape Fear Precast, LLC | Wilmington | NC | — | ◇ UNVERIFIED |
| CCCapital Cast Stone Inc. | Lebanon | IN | — | ◇ UNVERIFIED |
| CPCapital Precast | San Marcos | TX | — | ◇ UNVERIFIED |
| CSCapital Steel & Builders Supply INC | Holt | MI | — | ◇ UNVERIFIED |
| CSCapital Steel & Supply | Jefferson City | MO | — | ◇ UNVERIFIED |
| CWCapital Welding & Fabrication, INC. | Thibodaux | LA | — | ◇ UNVERIFIED |
| CICapitol Iron Works, INC. | Sacramento | CA | — | ◇ UNVERIFIED |
| CSCapitol Steel Fabricatiors INC | Commerce | CA | — | ◇ UNVERIFIED |
| CACapstan Ag Systems, INC | Topeka | KS | — | ◇ UNVERIFIED |
 Captive-aire Systems, INC. | Slidell | LA | — | ◇ UNVERIFIED |
| CICarbo-tech Incorporated | Monroe | GA | — | ◇ UNVERIFIED |
| CCCarder Concrete Plt No 2 | Arvada | CO | — | ◇ UNVERIFIED |
| CCCaribbean Cast Stone INC | Toa Alta | PR | — | ◇ UNVERIFIED |
| CICarico INC. | Fredericksburg | VA | — | ◇ UNVERIFIED |
| CCCarlson Concrete Products INC | Duluth | MN | — | ◇ UNVERIFIED |
| CRCarlson's Rural Mailbox | Oklahoma City | OK | — | ◇ UNVERIFIED |
| CLCarolina Laser Cutting, INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| CSCarothers & Son LTD | Eugene | OR | — | ◇ UNVERIFIED |
| CCCarr Concrete a Division of Cxt Incorporated | Williamstown | WV | — | ◇ UNVERIFIED |
| CLCarr Lane Drill Bushing CO. | Austin | TX | — | ◇ UNVERIFIED |
| CPCarr Precast Concrete, INC. | Dunn | NC | — | ◇ UNVERIFIED |
| CHCarsten Holdings, LLC | Newton | KS | — | ◇ UNVERIFIED |
| CICarter Iron and Steel Company | Hampton | VA | — | ◇ UNVERIFIED |
| CCCascade Container Fab Company | Ridgefield | WA | — | ◇ UNVERIFIED |
| CBCasco Bay Steel - Saco | Saco | ME | — | ◇ UNVERIFIED |
| CBCasco Bay Steel Structures, INC. | South Portland | ME | — | ◇ UNVERIFIED |
| CNCase New Holland INC | Benson | MN | — | ◇ UNVERIFIED |
| CNCase New Holland INC. | Goodfield | IL | — | ◇ UNVERIFIED |
| CICastcrete Incorporated | Somerset | MA | — | ◇ UNVERIFIED |
| CFCast Fireplaces | Houston | TX | — | ◇ UNVERIFIED |
| CRCastle Rock Precast LLC | Pleasant Grove | UT | — | ◇ UNVERIFIED |
| CCCastone Corporation | Opelika | AL | — | ◇ UNVERIFIED |
| CPCast Pac, INC. | Allentown | PA | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Mission | TX | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Bryan | TX | — | ◇ UNVERIFIED |
| CECatalina Espana Dba Espana Metal Craft | Panorama City | CA | — | ◇ UNVERIFIED |
| CSCataract Steel Industries Pa, INC. | Mckeesport | PA | — | ◇ UNVERIFIED |
| CICateck, INC. | Saint Peters | MO | — | ◇ UNVERIFIED |
| CCCates Caststone Company, INC. | Whitehouse | TX | — | ◇ UNVERIFIED |
| CCb&i | Lake Charles | LA | — | ◇ UNVERIFIED |
| CACbp Address, LLC | Hurricane | UT | — | ◇ UNVERIFIED |
| CCC & C Fabricators, INC. | Dacula | GA | — | ◇ UNVERIFIED |
| CCC C Ironworks LLC | New Middletown | OH | — | ◇ UNVERIFIED |
| CCCellular Concrete Solutions LLC | Allentown | PA | — | ◇ UNVERIFIED |
| CLCellxion LLC. | Bossier City | LA | — | ◇ UNVERIFIED |
