| CCCertainteed CORP - Lake Charles Polymer Plant | Westlake | LA | — | ◇ UNVERIFIED |
| CTCertain Teed INC | Orem | UT | — | ◇ UNVERIFIED |
| CMC&g Mercury Plastic | Sylmar | CA | — | ◇ UNVERIFIED |
| CPChada Properties, LLC | Sugar Grove | IL | — | ◇ UNVERIFIED |
| CNCharter Next Generation - Turner Falls | Turners Falls | MA | — | ◇ UNVERIFIED |
| CGChattanooga General Services CO. | Chattanooga | TN | — | ◇ UNVERIFIED |
| CCChemline Ca INC | Compton | CA | — | ◇ UNVERIFIED |
| CIChemplex Industries, INC. | Palm City | FL | — | ◇ UNVERIFIED |
| CTChem Tech Labs INC a Subs Ma | Lynwood | CA | — | ◇ UNVERIFIED |
| CAChemtreat at Terminal Warehouse | Akron | OH | — | ◇ UNVERIFIED |
| CCChemtura Corporation | Memphis | TN | — | ◇ UNVERIFIED |
| CHC & H Molding | Mira Loma | CA | — | ◇ UNVERIFIED |
| CLChristen & Laudon- Aep Fgd Project | Tiltonsville | OH | — | ◇ UNVERIFIED |
| CHCirculus Holdings Pbllc | Riverbank | CA | — | ◇ UNVERIFIED |
| CECirrus Enterprises Dba E.v. Roberts | Culver City | CA | — | ◇ UNVERIFIED |
| CMCirtec Medical CORP | Sturtevant | WI | — | ◇ UNVERIFIED |
| CPCitadel Plastics | Perrysburg | OH | — | ◇ UNVERIFIED |
| CJC J Fiberglass CO | Long Beach | CA | — | ◇ UNVERIFIED |
| CJC J Osborn Company | Pennsauken | NJ | — | ◇ UNVERIFIED |
| CRClarence Resins and Chemicals | Williamsville | NY | — | ◇ UNVERIFIED |
| COClariant of Maine | Lewiston | ME | — | ◇ UNVERIFIED |
| CFClark Foam Prod Gordon Clark | Laguna Niguel | CA | — | ◇ UNVERIFIED |
| CCClean Cut Technologies LLC | Anaheim | CA | — | ◇ UNVERIFIED |
| CWClean Water Opportunities, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| CClearplex | Sandy | UT | — | ◇ UNVERIFIED |
| CTClose the Loop INC | Hebron | KY | — | ◇ UNVERIFIED |
| CPClover Plastics LLC | West Chicago | IL | — | ◇ UNVERIFIED |
| CPCmc Printed Bag INC | Whittier | CA | — | ◇ UNVERIFIED |
| CECmi Enterprises | Forest City | NC | — | ◇ UNVERIFIED |
| CBCoastal Bend Staffing, LLC | Lolita | TX | — | ◇ UNVERIFIED |
| CPCoastal Plastics INC | Hope Valley | RI | — | ◇ UNVERIFIED |
| CCCoast Converters INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| CCColorado Chemical Specialties Incorporated | Golden | CO | — | ◇ UNVERIFIED |
| CRColorado Rubber and Supply | Denver | CO | — | ◇ UNVERIFIED |
| CSColorite Specialty Resins | Burlington Township | NJ | — | ◇ UNVERIFIED |
| CPColumbine Plastic CORP | Boulder | CO | — | ◇ UNVERIFIED |
| CCComplementary Coatings CORP | Edgewater | FL | — | ◇ UNVERIFIED |
| CComposecure | Somerset | NJ | — | ◇ UNVERIFIED |
| CPComposite Plastic Systems INC | Santa Maria | CA | — | ◇ UNVERIFIED |
| CPComposite Product Division Freeport | Freeport | TX | — | ◇ UNVERIFIED |
| CSComposite Solutions CORP Sumner | Sumner | WA | — | ◇ UNVERIFIED |
| CFConcept Fiberglass | Grand Island | NE | — | ◇ UNVERIFIED |
| CPConductive Plastics Consultants | Media | PA | — | ◇ UNVERIFIED |
| CCCongoleum CORP | Trenton | NJ | — | ◇ UNVERIFIED |
| CSConnor Sport Court International, LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
 Contemporary Design Plastics | Arlington | TX | — | ◇ UNVERIFIED |
| CSContinental Structural Plastics | Carey | OH | — | ◇ UNVERIFIED |
| CCCook Composites and Polymers CO. | N. Kansas City | MO | — | ◇ UNVERIFIED |
| CCCook Composites & Polymers CO. | Oxnard | CA | — | ◇ UNVERIFIED |
| CPCook Paint and Varnish Company | Houston | TX | — | ◇ UNVERIFIED |
