| CMCalhm Metals INC Dba Weld-kraft | Saint Louis Park | MN | — | ◇ UNVERIFIED |
| CACalifornia Air Conveying LLC | Paramount | CA | — | ◇ UNVERIFIED |
| CACalifornia All Steel Carports INC | Keizer | OR | — | ◇ UNVERIFIED |
| CBCalifornia Business Environments, Inc | Morgan Hill | CA | — | ◇ UNVERIFIED |
| CCCalifornia Chassis INC | Anaheim | CA | — | ◇ UNVERIFIED |
| CFCalifornia Fabrication | Canoga Park | CA | — | ◇ UNVERIFIED |
| CPCalifornia Precision Components LLC | Santa Clara | CA | — | ◇ UNVERIFIED |
| CSCalifornia Sheet Metal INC | Sacramento | CA | — | ◇ UNVERIFIED |
| CSCal Spray INC | East Palo Alto | CA | — | ◇ UNVERIFIED |
| CSCampell Steel Buildings, Inc. | Lubbock | TX | — | ◇ UNVERIFIED |
| CSCampo Sheet Metal Works, INC. | Houston | TX | — | ◇ UNVERIFIED |
| CMCanam Metal Prod | San Bernardino | CA | — | ◇ UNVERIFIED |
| CPCanopies Plus, INC. | Eufaula | OK | — | ◇ UNVERIFIED |
| CCCapital City Culvert Corporation | Madison | WI | — | ◇ UNVERIFIED |
| CBCapitol Builders Hardware, INC | Sacramento | CA | — | ◇ UNVERIFIED |
| CCapstone | Louisville | KY | — | ◇ UNVERIFIED |
| CCaptiveaire | Englewood | OH | — | ◇ UNVERIFIED |
| CCaptiveaire | Redding | CA | — | ◇ UNVERIFIED |
| C3Captiveaire 360 Youngsville Addition | Youngsville | NC | — | ◇ UNVERIFIED |
| CSCardinal Sheet Metal INC | Riverside | CA | — | ◇ UNVERIFIED |
| CFCarl Fisher Co., INC. | Springfield | MA | — | ◇ UNVERIFIED |
| COCarmichael Overhead Door, INC. | Carmichael | CA | — | ◇ UNVERIFIED |
| CRCarpenter's Roofing & Sheet Metal, INC. | West Palm Beach | FL | — | ◇ UNVERIFIED |
| CSCarport Structures CORP | Oxford | MI | — | ◇ UNVERIFIED |
| CICartel Industries LLC | Irvine | CA | — | ◇ UNVERIFIED |
| CSCarver Sheet Metal Works, Inc. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| CPCasMar Properties LLC | Louisville | KY | — | ◇ UNVERIFIED |
| CDCasper Disappearing Screen Systems, Inc. | Poway | CA | — | ◇ UNVERIFIED |
| CICastle Industries INC. of Ca. | Ontario | CA | — | ◇ UNVERIFIED |
| CPCavett Portable Buildings | Ponca City | OK | — | ◇ UNVERIFIED |
| CICavotec Inet US INC. | Cypress | CA | — | ◇ UNVERIFIED |
| CSCb Strain & Son INC. | Tarrytown | NY | — | ◇ UNVERIFIED |
| CFC&c Fabrication, INC. | Carrollton | GA | — | ◇ UNVERIFIED |
| CCCdi Curbs Company Dba Crystal Distribution, INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| CDC & D Metal Products, INC. | Thornton | CO | — | ◇ UNVERIFIED |
| CBCeco Building Systems | Mount Pleasant | IA | — | ◇ UNVERIFIED |
| CRCedar Rock Holdings, LLC | Lenoir | NC | — | ◇ UNVERIFIED |
| CICentek INC / Centek Facility | Oklahoma City | OK | — | ◇ UNVERIFIED |
| CCCenterline Corporation | Saint Croix | VI | — | ◇ UNVERIFIED |
| CPCenterline Prefab LLC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| CSCenter Sheet Metal, INC. | Brooklyn | NY | — | ◇ UNVERIFIED |
| CMCenterville Manufacturing LLC | Centerville | SD | — | ◇ UNVERIFIED |
| CCCentral Cal Metals | Fresno | CA | — | ◇ UNVERIFIED |
 Central Confinement Service LTD | Albion | NE | — | ◇ UNVERIFIED |
| CFCentral Florida Lumber and Supply Co, INC | Orlando | FL | — | ◇ UNVERIFIED |
| CFCentral Florida Metals AND Central FL Metals, LLC | Orlando | FL | — | ◇ UNVERIFIED |
| CKCentral Kentucky Industrial INC | Richmond | KY | — | ◇ UNVERIFIED |
| COCentral Ohio Sheet Metal Company | Reynoldsburg | OH | — | ◇ UNVERIFIED |
| COCentral Oregon Greenhouse Supply LLC | Bend | OR | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal, LLC | Wichita Falls | TX | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal, LLC | Seminole | OK | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal Products, INC. | Skokie | IL | — | ◇ UNVERIFIED |
| CSCentral States Manufacturing, INC. | Hartford | SD | — | ◇ UNVERIFIED |
| CSCentral States Manufacturing, INC. | Cedar Hill | TX | — | ◇ UNVERIFIED |
| CSCentral Steel Buildings, Inc. | Mount Airy | NC | — | ◇ UNVERIFIED |
| CWCentral Wisconsin Flex | Weston | WI | — | ◇ UNVERIFIED |
| CCentria | Hatton | KY | — | ◇ UNVERIFIED |
| CEC E Toland & Son | Benicia | CA | — | ◇ UNVERIFIED |
| CICew INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| CMCfc Manufacturing Co., INC. | Carbondale | PA | — | ◇ UNVERIFIED |
| CSCfg Systems INC Dba Concelafab Corporation | Colorado Springs | CO | — | ◇ UNVERIFIED |
| CHCfm Heating & Air Conditioning INC | Ogden | UT | — | ◇ UNVERIFIED |
| CMChadwick Manufacturing, LTD. | Chadwick | IL | — | ◇ UNVERIFIED |
| CDChallenger Designs | Nappanee | IN | — | ◇ UNVERIFIED |
| CDChallenger Door | Nappanee | IN | — | ◇ UNVERIFIED |
| CDChallenger Door | Nappanee | IN | — | ◇ UNVERIFIED |
| CTChamco Tools | Kansas City | MO | — | ◇ UNVERIFIED |
| COChampion Opco, LLC | Oklahoma City | OK | — | ◇ UNVERIFIED |
| CWChampion Windows INC. | Valencia | CA | — | ◇ UNVERIFIED |
 Chancey Metals Ramonda Blvd Facility | Jacksonville | FL | — | ◇ UNVERIFIED |
 Chandler Industries INC Stremel Division | Minneapolis | MN | — | ◇ UNVERIFIED |
| CACharlises Aluminum Products | Harriman | TN | — | ◇ UNVERIFIED |
| CWCheckpoint Welding - Fabrication INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| CWChenoa Welding & Fabrication, INC. | Chenoa | IL | — | ◇ UNVERIFIED |
| CMCherokee Metal Building Erectors | Marietta | GA | — | ◇ UNVERIFIED |
| CBChicago Blow Pipe Company | Marquette | MI | — | ◇ UNVERIFIED |
| CTChicago Tube & Iron | Ankeny | IA | — | ◇ UNVERIFIED |
| CMChickasha Manufacturing | Chickasha | OK | — | ◇ UNVERIFIED |
 Chief Industries INC | Grand Island | NE | — | ◇ UNVERIFIED |
| CMChi Manufacturing, INC. | Englewood | CO | — | ◇ UNVERIFIED |
| CWChristian W K Metal Works | Bristol | TN | — | ◇ UNVERIFIED |
| CRChristopher Ray Stilson | Port Allegany | PA | — | ◇ UNVERIFIED |
| CICirclemaster, INC | Santee | CA | — | ◇ UNVERIFIED |
| CSCiti Staff Solutions INC | San Dimas | CA | — | ◇ UNVERIFIED |
| CCititrends | Roland | OK | — | ◇ UNVERIFIED |
| CSCitory Solutions, LLC | Saint Cloud | FL | — | ◇ UNVERIFIED |
| CMC&j Metal Products | Paramount | CA | — | ◇ UNVERIFIED |
| CICkkm INC | Corona | CA | — | ◇ UNVERIFIED |
| CCClabber Creek Closet Co. | Mchenry | IL | — | ◇ UNVERIFIED |
| CIClad Industries LLC | Macedon | NY | — | ◇ UNVERIFIED |
| CIClamp It Coping LLC | Springville | UT | — | ◇ UNVERIFIED |
| CCClar Company | Doral | FL | — | ◇ UNVERIFIED |
| CCClar Company | Miami | FL | — | ◇ UNVERIFIED |
| CAClass a Precision, INC. | Corona | CA | — | ◇ UNVERIFIED |
| CGClassic Gutter Systems LLC | Galesburg | MI | — | ◇ UNVERIFIED |
| CMClassic Metals Suppliers, Corp. | Palmetto Bay | FL | — | ◇ UNVERIFIED |
| CSClassic Sheet Metal, INC. | Franklin Park | IL | — | ◇ UNVERIFIED |
| CBClearly Building Corporation | Secor | IL | — | ◇ UNVERIFIED |
| COClearview of Phoenix LLC | Gilbert | AZ | — | ◇ UNVERIFIED |
| CSCleveland Steel Specialty Company | Bedford | OH | — | ◇ UNVERIFIED |
