| CBCooper B-line | Aurora | CO | — | ◇ UNVERIFIED |
| CLCoopers LLC | Boyertown | PA | — | ◇ UNVERIFIED |
| CCCopper Capital Investment Corporation | Tucson | AZ | — | ◇ UNVERIFIED |
| CCCopper Construction Company, INC. | Vidalia | GA | — | ◇ UNVERIFIED |
| CICorban Industries INC | Belton | MO | — | ◇ UNVERIFIED |
| CMCordeck Manufacturing | Denton | TX | — | ◇ UNVERIFIED |
| CMCoren Metal Crafts, CO. | Bensalem | PA | — | ◇ UNVERIFIED |
| CICoronado Irrigation Services | Delano | CA | — | ◇ UNVERIFIED |
| CICorrugated Industries, INC. | Chalmette | LA | — | ◇ UNVERIFIED |
| CICorrugated Industries of Florida, INC | Tampa | FL | — | ◇ UNVERIFIED |
| CECosmic Eats, INC. | Cary | NC | — | ◇ UNVERIFIED |
| CICOSM Inc. | Paso Robles | CA | — | ◇ UNVERIFIED |
| CECoufal Equipment CO | Temple | TX | — | ◇ UNVERIFIED |
| CCCountry Customs Corral | La Puente | CA | — | ◇ UNVERIFIED |
| CMCountywide Mechanical System, INC | Cajon | CA | — | ◇ UNVERIFIED |
| CBCouvrette Building Systems | Salem | VA | — | ◇ UNVERIFIED |
| CMCox Machine | Harper | KS | — | ◇ UNVERIFIED |
 Cox Manufacturing Dba Dalton Ag Products | Lenox | IA | — | ◇ UNVERIFIED |
| CFCpc Fabrication INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| CECph Enterprises INC. | Bruce | WI | — | ◇ UNVERIFIED |
| CICrafts INC. | Manitowoc | WI | — | ◇ UNVERIFIED |
| CCCraftsman Custom Metals, LLC | Schiller Park | IL | — | ◇ UNVERIFIED |
| CICraftsmen Industries Inc-clay St Plant | Saint Charles | MO | — | ◇ UNVERIFIED |
| CACrary Agricultural Solutions LLC | Morgan | MN | — | ◇ UNVERIFIED |
| CHCrease HVAC, Inc. | Rochester | NY | — | ◇ UNVERIFIED |
| CACreative Automation Company | Sun Valley | CA | — | ◇ UNVERIFIED |
| CSCreative Sheet Metal INC | Leeds | UT | — | ◇ UNVERIFIED |
| CSCreer Sheet Metal Works | Provo | UT | — | ◇ UNVERIFIED |
| CMCresco Manufacturing INC | Anaheim | CA | — | ◇ UNVERIFIED |
| CMC&R Machine, LLC | Jacksonville | TX | — | ◇ UNVERIFIED |
| CACrocker Architectural Sheet Metal Co., INC. | Wellesley | MA | — | ◇ UNVERIFIED |
| CACrowe and Downey INC. | Smyrna | GA | — | ◇ UNVERIFIED |
 Crown Products Company INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| CKCrustbuster/speed King - Dodge City | Dodge City | KS | — | ◇ UNVERIFIED |
| CDCrystal Distribution INC | Elk River | MN | — | ◇ UNVERIFIED |
| CICsi Industries, INC. | Fairview | PA | — | ◇ UNVERIFIED |
| CPCurbs Plus INC | El Dorado | KS | — | ◇ UNVERIFIED |
| CPCurbs Plus INC | Ringgold | GA | — | ◇ UNVERIFIED |
| CPCurbs Plus, INC | Glendale | AZ | — | ◇ UNVERIFIED |
| CFCurtiss-wright Flight Systems INC | Fairfield | NJ | — | ◇ UNVERIFIED |
| CACustom Air Ducts By Rick LLC | Saint Louis Park | MN | — | ◇ UNVERIFIED |
| CMCustom-bilt Metals | Mcclellan | CA | — | ◇ UNVERIFIED |
| CCCustom Copper Designs | Edmond | OK | — | ◇ UNVERIFIED |
| CCCustom Corrugated & Supply, LLC | Gray | LA | — | ◇ UNVERIFIED |
| CLCustom Land Holding Company LLC | LaBelle | FL | — | ◇ UNVERIFIED |
| CMCustom Metal Products, INC. | Los Angeles (chatsworth Area) | CA | — | ◇ UNVERIFIED |
| CMCustom Metal Roofing, INC. | Murrayville | GA | — | ◇ UNVERIFIED |
| CMCustom Metals of Virginia | Manassas | VA | — | ◇ UNVERIFIED |
 Custom Products of Litchfield INC | Litchfield | MN | — | ◇ UNVERIFIED |
| CSCustom Sheet Metal, INC. | Gaithersburg | MD | — | ◇ UNVERIFIED |
| CSCustom Sheetmetal Services, INC. | Durham | NC | — | ◇ UNVERIFIED |
| CSCustom Stainless Steel Equipment Co. Inc. | LaBelle | FL | — | ◇ UNVERIFIED |
| CSCustom Stainless Steel INC | Shoreview | MN | — | ◇ UNVERIFIED |
| CWCustom Welding INC. | Frenchtown | NJ | — | ◇ UNVERIFIED |
| CECutting Edge Fabrication, INC. | Gastonia | NC | — | ◇ UNVERIFIED |
| CFC-ville Fabricating INC Dba Tarter | Liberty | KY | — | ◇ UNVERIFIED |
| CLCW Laser and Fabrication LLC | Grandview | MO | — | ◇ UNVERIFIED |
| CPCw Precision Fabrication and Welding, INC. | Houston | TX | — | ◇ UNVERIFIED |
| CSCwp Sheet Metal, INC. | Geneva | FL | — | ◇ UNVERIFIED |
| CSCw Seahorn Enterprises LTD | Houston | TX | — | ◇ UNVERIFIED |
| CMCygnet Manufacturing CO. INC | Oaks | PA | — | ◇ UNVERIFIED |
| DIDakota, Inc. | East Grand Forks | MN | — | ◇ UNVERIFIED |
| DIDaktronics INC | Redwood Falls | MN | — | ◇ UNVERIFIED |
| DIDalsin Industries INC | Bloomington | MN | — | ◇ UNVERIFIED |
| DADalton Ag Products | Lenox | IA | — | ◇ UNVERIFIED |
| DMD&a Metal Fabrication INC | Van Nuys | CA | — | ◇ UNVERIFIED |
| DDDan Dee Air INC. | Hutchinson | KS | — | ◇ UNVERIFIED |
 Dane Manufacturing | Waunakee | WI | — | ◇ UNVERIFIED |
| DLDaniels' Louver & Sheet Metal Company, INC. | Mobile | AL | — | ◇ UNVERIFIED |
| DSDaniels Sheet Metal | Orange Beach | AL | — | ◇ UNVERIFIED |
| DMDanny Music Sheet Metal | Lilburn | GA | — | ◇ UNVERIFIED |
| DWDarrell W. Strunk Dba Strunk's Roofing & Home Impr | Lexington | KY | — | ◇ UNVERIFIED |
| DWDasco Welded Products, INC. | Waterbury | CT | — | ◇ UNVERIFIED |
| DMData Metalcraft INC | Chaska | MN | — | ◇ UNVERIFIED |
| DADavid Alan Wright | Coos Bay | OR | — | ◇ UNVERIFIED |
| DWDavid W. Bonacci Dba American Rain Gutter | Sacramento | CA | — | ◇ UNVERIFIED |
| DWDavid Wiest | Knoxville | TN | — | ◇ UNVERIFIED |
| DEDawn Equipment CO | Sycamore | IL | — | ◇ UNVERIFIED |
| DIDayco, INC. | Mobile | AL | — | ◇ UNVERIFIED |
| DUDayco USA INC. | Clearwater | FL | — | ◇ UNVERIFIED |
 Dayton Superior CORP | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| DSDb2 Services | Kansas City | KS | — | ◇ UNVERIFIED |
| DADBM Associates, LLC | Lakeland | FL | — | ◇ UNVERIFIED |
| DBD & B Metal Roofing Supply INC. | Anniston | AL | — | ◇ UNVERIFIED |
| DSDCH Service Solutions LLC | Clarkesville | GA | — | ◇ UNVERIFIED |
| DDD & D Design Manufacturing INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| DED&D Electric Motor Pump & Machine, Inc. | Moses Lake | WA | — | ◇ UNVERIFIED |
| DSD&d Sheet Metal | Lutz | FL | — | ◇ UNVERIFIED |
| DIDds Industries INC | Fall River | MA | — | ◇ UNVERIFIED |
| DADeere and Company | Paton | IA | — | ◇ UNVERIFIED |
| DCDeere & CO | Coal Valley | IL | — | ◇ UNVERIFIED |
| DCDeere & Company | Horicon | WI | — | ◇ UNVERIFIED |
| DMDefiance Metal Products | Bedford | PA | — | ◇ UNVERIFIED |
| DYDelbert Young Sheet Metal Service | Ardmore | OK | — | ◇ UNVERIFIED |
 Dellinger Enterprises, LTD. | Belmont | NC | — | ◇ UNVERIFIED |
| DCDelta Consolidated, LLC | Harvey | LA | — | ◇ UNVERIFIED |
| DMDelta Metals, LLC | Leon | IA | — | ◇ UNVERIFIED |
| DSDelta Sheet Metal CORP. | New York | NY | — | ◇ UNVERIFIED |
| DADeMoss Ag Inc. | Rushville | IL | — | ◇ UNVERIFIED |
| DIDempster Industries | Beatrice | NE | — | ◇ UNVERIFIED |
