| CICarter Iron and Steel Company | Hampton | VA | — | ◇ 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 | Mission | TX | — | ◇ UNVERIFIED |
| CSCast Sheet Metal LLC | Bryan | TX | — | ◇ UNVERIFIED |
| CSCataract Steel Industries Pa, INC. | Mckeesport | PA | — | ◇ UNVERIFIED |
| CICateck, INC. | Saint Peters | MO | — | ◇ UNVERIFIED |
| CECavallo Enterprises, INC | Healdsburg | CA | — | ◇ UNVERIFIED |
| CICb & I | Clearfield | UT | — | ◇ UNVERIFIED |
| CCb&i | Lake Charles | LA | — | ◇ UNVERIFIED |
| CECb&i El Dorado | El Dorado | AR | — | ◇ UNVERIFIED |
| CBC & B Piping (w), INC. | Leeds | AL | — | ◇ 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 |
| CICenturion Industries INC | Garrett | IN | — | ◇ 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 |
| CIChalfant INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| CLChallenger Lifts INC | Louisville | KY | — | ◇ UNVERIFIED |
| CEChamfer Engineering INC | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| CIChampion Ironworks Incorporated | Berryville | VA | — | ◇ UNVERIFIED |
| CFChannelview Facility | Houston | TX | — | ◇ 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 |
| CWCharps Welding & Fabricating INC | Clearbrook | MN | — | ◇ UNVERIFIED |
| CIChart INC | Fremont | CA | — | ◇ 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 |
| CTChicago Tube and Iron Company | Locust | NC | — | ◇ UNVERIFIED |
| CEChickasaw Energy Solutions | Marietta | OK | — | ◇ UNVERIFIED |
| CPChimney Products INC. | Lancaster | CA | — | ◇ UNVERIFIED |
| CHC. H. Kirkpatrick & Sons Welding Service, INC. | Cartersville | GA | — | ◇ UNVERIFIED |
| CCChoice Couplings, LLC | Katy | TX | — | ◇ UNVERIFIED |
| CIChutes International | Waldorf | MD | — | ◇ UNVERIFIED |
| CFCianbro Fab & Coating CORP (bangor) | Bangor | ME | — | ◇ UNVERIFIED |
| CCCii Cobb Industrial, INC. | Arlington | TX | — | ◇ UNVERIFIED |
| CICinco Iron Works INC | Ontario | CA | — | ◇ UNVERIFIED |
| CICIP Industries, LLC | Panama City | FL | — | ◇ UNVERIFIED |
| CHCircle H Welding & Fabrication, INC. | Seale | AL | — | ◇ UNVERIFIED |
| CCivacon | Riverside | MO | — | ◇ 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 |
| CSCK Supply, LLC | Jal | NM | — | ◇ UNVERIFIED |
| CSCladding Systems, INC | Tampa | FL | — | ◇ UNVERIFIED |
| CAClarke's Allied INC. | Shreveport | LA | — | ◇ UNVERIFIED |
| CPClark Pacific Dba Pacific Embedded Products | Fontana | CA | — | ◇ UNVERIFIED |
| CSClark Substations L L C | Calera | AL | — | ◇ UNVERIFIED |
| CWClark Welding and Fabricating, INC. | Frederick | MD | — | ◇ UNVERIFIED |
| CFClayton Fabrication and Metal Works INC. | Sikeston | MO | — | ◇ UNVERIFIED |
| CSClermont Steel Fabricating, LLC | Batavia | OH | — | ◇ UNVERIFIED |
| CMCleveland Manufacturing CO | Sweetwater | TN | — | ◇ UNVERIFIED |
| CSCleveland Screw Products | Cleveland | OH | — | ◇ UNVERIFIED |
| CYCleveland Yutaka Corporation | Shelby | NC | — | ◇ UNVERIFIED |
| CKCliff Koppe Metals | Kelso | WA | — | ◇ UNVERIFIED |
| CMC&L Metal Sales LLC | Portland | OR | — | ◇ UNVERIFIED |
| CSClock Spring / Nri | Centennial | CO | — | ◇ UNVERIFIED |
| CFCls Fabrication INC | Bend | OR | — | ◇ UNVERIFIED |
| CACMA Acquisitions, Inc. | Saint Joseph | MO | — | ◇ UNVERIFIED |
| CACmc Anchoring Systems | Salisbury | NC | — | ◇ UNVERIFIED |
| CCCmc Construction Svc | Kailua | HI | — | ◇ UNVERIFIED |
| CJCmc Joist and Deck Sc | Eastover | SC | — | ◇ UNVERIFIED |
| CJCmc Joist and Deck/ White Deer Twp | New Columbia | PA | — | ◇ UNVERIFIED |
| CPCmc Post Oklahoma LLC CO Commercial Met / Cmc Southern Post Durant | Durant | OK | — | ◇ UNVERIFIED |
| CRCmc Rebar | Navasota | TX | — | ◇ UNVERIFIED |
| CRCmc Rebar | Fredericksburg | VA | — | ◇ UNVERIFIED |
| CRCmc Rebar-ct-plainville | Plainville | CT | — | ◇ UNVERIFIED |
| CRCmc Rebar-in Muncie | Muncie | IN | — | ◇ UNVERIFIED |
| CRCmc Rebar - Kansas City | Kansas City | MO | — | ◇ UNVERIFIED |
