| 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 |
| CICageco INC | Adelanto | CA | — | ◇ UNVERIFIED |
| CMCajah's Machine - Flexible Products, LLC | Lenoir | NC | — | ◇ 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 |
| CCalfabco | South El Monte | CA | — | ◇ UNVERIFIED |
| CFCaliber Fabrication, LLC | West Valley City | UT | — | ◇ 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. | Phoenix | AZ | — | ◇ UNVERIFIED |
| CSCamblin Steel Service, Inc. | Rocklin | CA | — | ◇ 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 |
| CHCapital Heights Iron Works, LLC | Capitol Heights | MD | — | ◇ UNVERIFIED |
| CSCapital Steel & Builders Supply INC | Holt | MI | — | ◇ UNVERIFIED |
| CSCapital Steel Products | Ontario | CA | — | ◇ 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 |
| CSCapitol Steel Products | Bakersfield | CA | — | ◇ UNVERIFIED |
| CSCapitol Steel Products a Division of Security | Sacramento | CA | — | ◇ UNVERIFIED |
| CACapstan Ag Systems, INC | Topeka | KS | — | ◇ UNVERIFIED |
 Captive-aire Systems, INC. | Slidell | LA | — | ◇ UNVERIFIED |
| CICarfaro, INC. | Trenton | NJ | — | ◇ UNVERIFIED |
| CICarico INC. | Fredericksburg | VA | — | ◇ UNVERIFIED |
| CLCarolina Laser Cutting, INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| CLCarr Lane Drill Bushing CO. | Austin | TX | — | ◇ UNVERIFIED |
| CHCarsten Holdings, LLC | Newton | KS | — | ◇ UNVERIFIED |
| CICarter Iron and Steel Company | Hampton | VA | — | ◇ UNVERIFIED |
| CLCartrust, LLC | Tampa | FL | — | ◇ UNVERIFIED |
| CCCascade Coil Drapery INC | Tualatin | OR | — | ◇ 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 |
| CPCast Pac, INC. | Allentown | PA | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Mission | TX | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Bryan | TX | — | ◇ UNVERIFIED |
| CDCaswell Design Build Corporation | Emeryville | CA | — | ◇ UNVERIFIED |
| CSCataract Steel Industries Pa, INC. | Mckeesport | PA | — | ◇ UNVERIFIED |
| CICateck, INC. | Saint Peters | MO | — | ◇ UNVERIFIED |
| CCb&i | Lake Charles | LA | — | ◇ UNVERIFIED |
| CCC & C Fabricators, INC. | Dacula | GA | — | ◇ UNVERIFIED |
| CCC C Ironworks LLC | New Middletown | OH | — | ◇ UNVERIFIED |
| CMCencal Machine CO INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| CRCentech Rebar LLC | San Bernardino | CA | — | ◇ UNVERIFIED |
| CCCentral Carolina Sprinkler INC. | Lincolnton | NC | — | ◇ UNVERIFIED |
| CICentral Illinios Steel Company | Guntersville | AL | — | ◇ UNVERIFIED |
 Central Metal Fabricators, INC. | Miami | FL | — | ◇ UNVERIFIED |
| CMCentral Minnesota Fabricating INC | Willmar | MN | — | ◇ UNVERIFIED |
| CSCentral Steel & Ornamental Supply CO | Los Angeles | CA | — | ◇ UNVERIFIED |
| CTCentral Texas Express Metalwork, LLC | San Antonio | TX | — | ◇ UNVERIFIED |
| CVCentral Valley Fabricators | Stockton | CA | — | ◇ UNVERIFIED |
| CWCentral Welding & Machine LLC | Hutchinson | KS | — | ◇ UNVERIFIED |
| CWCentral Wire & Iron Works INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| CMCentra Metal LLC | Osage Beach | MO | — | ◇ UNVERIFIED |
| CICenturion Industries INC | Garrett | IN | — | ◇ UNVERIFIED |
| CICentury Iron Craft, INC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| CMCentury Metals & Supplies, INC. | Miami Gardens | FL | — | ◇ UNVERIFIED |
| CSCentury Steel Products, INC. | Sterling | VA | — | ◇ UNVERIFIED |
| CICeo, INC. | Sapulpa | OK | — | ◇ UNVERIFIED |
| CCCerta Craft, Inc. | Indianapolis | IN | — | ◇ UNVERIFIED |
| CICerti-fab Industries, INC. | Crosby | TX | — | ◇ UNVERIFIED |
| CICgk INC Dba Paradise Steel | South El Monte | CA | — | ◇ UNVERIFIED |
| CICgk INC Dba Premier Steel Fabrication | South El Monte | CA | — | ◇ UNVERIFIED |
| CGC & G Machine | Granby | MA | — | ◇ UNVERIFIED |
| CGC G Systems INC | Lake Forest | CA | — | ◇ UNVERIFIED |
| CRChad Riesenberg | Earling | IA | — | ◇ UNVERIFIED |
| CICha Industriesc | Fremont | CA | — | ◇ UNVERIFIED |
| CLChallenger Lifts INC | Louisville | KY | — | ◇ UNVERIFIED |
| CEChamfer Engineering INC | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| CIChampion Ironworks Incorporated | Berryville | VA | — | ◇ UNVERIFIED |
 Chancey Metals LLC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| CFChannelview Facility | Houston | TX | — | ◇ UNVERIFIED |
| CHChanning Hammond | Goleta | CA | — | ◇ UNVERIFIED |
| CLCharley's LP Truck CORP. | Orlando | FL | — | ◇ UNVERIFIED |
| CIChart Industries, LLC | Troy | NY | — | ◇ UNVERIFIED |
| CWChenoa Welding & Fabrication, INC. | Chenoa | IL | — | ◇ UNVERIFIED |
| CHCherry Hill Fabrication | Curtis Bay | MD | — | ◇ UNVERIFIED |
| CECherrytree Enterprises INC | Kansas City | KS | — | ◇ UNVERIFIED |
| CEChickasaw Energy Solutions | Marietta | OK | — | ◇ UNVERIFIED |
| CIChico Ironworks INC | Chico | CA | — | ◇ UNVERIFIED |
| CUChico Unified School District | Chico | CA | — | ◇ UNVERIFIED |
