| CACharlises Aluminum Products | Harriman | TN | — | ◇ UNVERIFIED |
| CCititrends | Roland | OK | — | ◇ UNVERIFIED |
| CCClar Company | Doral | FL | — | ◇ UNVERIFIED |
| CCClar Company | Miami | FL | — | ◇ UNVERIFIED |
| CAClass a Precision, INC. | Corona | CA | — | ◇ UNVERIFIED |
| COClearview of Phoenix LLC | Gilbert | AZ | — | ◇ UNVERIFIED |
| CCClopay CORP | Russia | OH | — | ◇ UNVERIFIED |
| CICoastal Industries, INC | Haverhill | MA | — | ◇ UNVERIFIED |
| CWCoastal Woodwork INC | Pompano Beach | FL | — | ◇ UNVERIFIED |
| CSCoastline Shutters & Manufacturing, LLC | Pensacola | FL | — | ◇ UNVERIFIED |
| CCCold Chain, LLC | Boise | ID | — | ◇ UNVERIFIED |
| CGColumbia Glass and Window Company | Kansas City | MO | — | ◇ UNVERIFIED |
| CDCommercial Display Systems | Santa Clarita | CA | — | ◇ UNVERIFIED |
| CDCommercial Display Systems LLC | San Fernando | CA | — | ◇ UNVERIFIED |
| CDCommercial Door | Pomona | CA | — | ◇ UNVERIFIED |
| CDCommercial Door & Hardware INC | Paducah | KY | — | ◇ UNVERIFIED |
| CDCommercial Door Manufacturing INC | Albuquerque | NM | — | ◇ UNVERIFIED |
| CMCommercial Material and Door Supp INC Dba Comm Mill & Build Supp | Milpitas | CA | — | ◇ UNVERIFIED |
| CDComplete Door Systems, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| CMComprehensive Mfg Svcs | Saint Louis | MO | — | ◇ UNVERIFIED |
| CFConcept Frames Incorporated | Newton | NC | — | ◇ UNVERIFIED |
| CSCondoors Security Wrought Iron | Fresno | CA | — | ◇ UNVERIFIED |
| CCContech Construction Products INC | Ashland | KY | — | ◇ UNVERIFIED |
 Contech Engineered Solutions LLC | Pinellas Park | FL | — | ◇ UNVERIFIED |
| CWContinental Windows and Glass Corporation | Chicago | IL | — | ◇ UNVERIFIED |
| CAControl Access Consultants, INC. | Sacramento | CA | — | ◇ UNVERIFIED |
| CICornell Iron Works, INC. | Mountain Top | PA | — | ◇ UNVERIFIED |
| CWCoronet Window Company | Kansas City | MO | — | ◇ UNVERIFIED |
| CECorporate Equity LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| CRC R Laurence CO INC | Gardena | CA | — | ◇ UNVERIFIED |
| CLC.r. Laurence CO. Inc./united States Aluminum | Miami | FL | — | ◇ UNVERIFIED |
| CLCroft LLC | Magnolia | MS | — | ◇ UNVERIFIED |
| CLCroft LLC | Magnolia | MS | — | ◇ UNVERIFIED |
| CDCrown Diversified Industries Corporation | Chesterfield | MO | — | ◇ UNVERIFIED |
| CICrown Incorporated | Plato | MN | — | ◇ UNVERIFIED |
| CWCrystal Window & Door Systems Pa, LLC | Dalton | PA | — | ◇ UNVERIFIED |
| CDCurries Division of Aadg, INC - 9th Street | Mason City | IA | — | ◇ UNVERIFIED |
| CHCustodio Holdings, LLC | Henrico | VA | — | ◇ UNVERIFIED |
 Custom Doors & Associates, LLC | Davie | FL | — | ◇ UNVERIFIED |
| CSCustom Screens | Honolulu | HI | — | ◇ UNVERIFIED |
| CWCustom Window CO. | Englewood | CO | — | ◇ UNVERIFIED |
| CACw Aluminum LLC | Carolina | PR | — | ◇ UNVERIFIED |
| DDDab Door Company, INC. | Hialeah Gardens | FL | — | ◇ UNVERIFIED |
| DMDailey Manufacturing CO | Willow Grove | PA | — | ◇ UNVERIFIED |
| DMDauenhauer Manufacturing | Santa Rosa | CA | — | ◇ UNVERIFIED |
| DMDelden Manufacturing Co., INC. | Valley Park | MO | — | ◇ UNVERIFIED |
| DMDialum Manufacturing CORP | Caguas | PR | — | ◇ UNVERIFIED |
| DDDiamond Door Products LTD | Hempstead | TX | — | ◇ UNVERIFIED |
| DSDistinctive Skylights | Richmond | CA | — | ◇ UNVERIFIED |
| DWDiversified Window & Door, INC. | Cairo | GA | — | ◇ UNVERIFIED |
