| CFCamryn Fabrication Dba Pro Weld LLC | Chesterfield | MI | — | ◇ UNVERIFIED |
| CMCamtech Manufacturing Solutions LLC | Science Hill | KY | — | ◇ UNVERIFIED |
| CECanalta Enterprises LLC Dba Phillips Iron Works | Raleigh | NC | — | ◇ 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 |
 Captive-aire Systems, INC. | Slidell | LA | — | ◇ UNVERIFIED |
| CICarfaro, INC. | Trenton | NJ | — | ◇ UNVERIFIED |
| CICarico INC. | Fredericksburg | VA | — | ◇ UNVERIFIED |
| CLCarolina Laser Cutting, INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| CWCarrier Welding and Fabrication, LLC | Wilton | ME | — | ◇ 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 |
| CPCast Pac, INC. | Allentown | PA | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Bryan | TX | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Mission | 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 |
| CFCci Fluid Kinetics | Winfield | KS | — | ◇ UNVERIFIED |
| CCC C Ironworks LLC | New Middletown | OH | — | ◇ UNVERIFIED |
| CMCd'a Metals | Wenatchee | WA | — | ◇ UNVERIFIED |
| CDCds Distributing, INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| CMCedar Mountain Cupolas LLC | Gray | ME | — | ◇ UNVERIFIED |
| CMCencal Machine CO INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| CRCentech Rebar LLC | San Bernardino | CA | — | ◇ UNVERIFIED |
| CPCentennial Processing LLC | Gary | IN | — | ◇ 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 States Manufacturing, INC. | Jasper | AL | — | ◇ 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 |
| CSCf Steel L.l.c. | Oakboro | NC | — | ◇ 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 |
| CIChalfant INC. | Cleveland | OH | — | ◇ 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 |
| CMChanute Manufacturing, a Division of Optimus CORP. | Chanute | KS | — | ◇ UNVERIFIED |
| CMCharleston Marine Containers INC | North Charleston | SC | — | ◇ UNVERIFIED |
| CLCharley's LP Truck CORP. | Orlando | FL | — | ◇ UNVERIFIED |
| CIChart Industries, LLC | Troy | NY | — | ◇ UNVERIFIED |
| CBChattanooga Boiler & Tank | Chattanooga | TN | — | ◇ 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 |
| CHC. H. Kirkpatrick & Sons Welding Service, INC. | Cartersville | GA | — | ◇ UNVERIFIED |
| CFChris French Metal INC | Oakland | CA | — | ◇ UNVERIFIED |
| CPChris Property Service INC | Greenville | SC | — | ◇ UNVERIFIED |
| CIChutes International | Waldorf | MD | — | ◇ UNVERIFIED |
| CCCii Cobb Industrial, INC. | Arlington | TX | — | ◇ UNVERIFIED |
| CDCimarron Development, INC. | Las Vegas | NV | — | ◇ UNVERIFIED |
| CICinco Iron Works INC | Ontario | CA | — | ◇ UNVERIFIED |
| CICIP Industries, LLC | Panama City | FL | — | ◇ UNVERIFIED |
| CHCircle H Welding & Fabrication, INC. | Seale | AL | — | ◇ UNVERIFIED |
| CSCircular Stairs INC | Little Neck | NY | — | ◇ UNVERIFIED |
| CICity Ironsmith, Corporation | Brooklyn | NY | — | ◇ UNVERIFIED |
| CCCives Corporation - Augusta | Augusta | ME | — | ◇ UNVERIFIED |
| CECivic Enterprises INC | West Monroe | LA | — | ◇ UNVERIFIED |
| CWC&j Welding and Fabricating, INC | Smyrna | GA | — | ◇ UNVERIFIED |
| CCCk & Company of Oregon INC | Salem | OR | — | ◇ UNVERIFIED |
| CKC K Johnson Industries | Arcata | CA | — | ◇ UNVERIFIED |
| CSCladding Systems, INC | Tampa | FL | — | ◇ UNVERIFIED |
| CDClark Dietrich Building Systems | Woodland | CA | — | ◇ UNVERIFIED |
