| CECone Engineering, Inc. | Los Alamitos | CA | — | ◇ UNVERIFIED |
| CAConfer Automotive | Ben Lomond | CA | — | ◇ UNVERIFIED |
| CRConstructors Racing Group, LLC | San Francisco | CA | — | ◇ UNVERIFIED |
| CAContinental Ag | Troy | MI | — | ◇ UNVERIFIED |
| CAContinental Automotive Systems, Us, INC. | Huntsville | AL | — | ◇ UNVERIFIED |
| CMContinental Mfg. Company, INC. | Houston | TX | — | ◇ UNVERIFIED |
| CICooligy INC | Mountain View | CA | — | ◇ UNVERIFIED |
| CACooper-standard Automotive of Fairview | Fairview | MI | — | ◇ UNVERIFIED |
| CLCorral-130 LLC | Compton | CA | — | ◇ UNVERIFIED |
| CVCorsa Velocita Group LLC. | North Hollywood | CA | — | ◇ UNVERIFIED |
| CWCosmo Wheels INC | Winchester | KY | — | ◇ UNVERIFIED |
 Cpk Manufacturing INC | San Jose | CA | — | ◇ UNVERIFIED |
| CSCrankshaft Supply CO INC. | Minneapolis | MN | — | ◇ UNVERIFIED |
| CTCratos Technologies LLC | Pompano Beach | FL | — | ◇ UNVERIFIED |
| CFCrescent Forge & Shovel Co-div of Eric | Havana | IL | — | ◇ UNVERIFIED |
| CLCromCo, LLC | Cypress | CA | — | ◇ UNVERIFIED |
| CSC & S Commercial Truck and Van Equipment | Palatka | FL | — | ◇ UNVERIFIED |
| CACtw Automation, INC. | Lexington | NC | — | ◇ UNVERIFIED |
| CCCuesta College (generator) | San Luis Obispo | CA | — | ◇ UNVERIFIED |
| CECummins Electrified Power | Dixon | CA | — | ◇ UNVERIFIED |
| CECummins Electrified Power | West Sacramento | CA | — | ◇ UNVERIFIED |
| CECummins Emission Solutions | Stoughton | WI | — | ◇ UNVERIFIED |
| CICummins, INC. | Columbus | IN | — | ◇ UNVERIFIED |
| CHCurmudgeon Holdings, LLC. | Los Angeles | CA | — | ◇ UNVERIFIED |
| CECurrent EV Motors LLC | Austin | TX | — | ◇ UNVERIFIED |
| CGCurt Group | Allentown | PA | — | ◇ UNVERIFIED |
| CCCurvilinear Components LLC | San Clemente | CA | — | ◇ UNVERIFIED |
| CMCustomized Manufacturing and Assembly INC | Rochester Hills | MI | — | ◇ UNVERIFIED |
| CTCustom Tranz INC Dba Valve Body Pro | San Jose | CA | — | ◇ UNVERIFIED |
| CCvg/mwc | Monona | IA | — | ◇ UNVERIFIED |
| CMCvg/ Mwc Edgewood | Edgewood | IA | — | ◇ UNVERIFIED |
| CMC&w Manufacturing Dba C&w Machine Shop | Turlock | CA | — | ◇ UNVERIFIED |
| CHCylinder Head Engineering LLC | De Soto | KS | — | ◇ UNVERIFIED |
| DHD.A.C. Holding Ltd. | Brighton | MI | — | ◇ UNVERIFIED |
| DHDaedong Hi-lex of America | Cusseta | AL | — | ◇ UNVERIFIED |
| DUDaikyonishikawa U.s.a., INC. | Madison | AL | — | ◇ UNVERIFIED |
| DPDalenzie Professionally Built Torque Converters | Oceanside | CA | — | ◇ UNVERIFIED |
| DADana Automotive Systems Group LLC | Crossville | TN | — | ◇ UNVERIFIED |
| DCDana Corporation | Farmington | MI | — | ◇ UNVERIFIED |
| DCDana Coupled Prods | Upper Sandusky | OH | — | ◇ UNVERIFIED |
| DTDanfoss Turbocor Compressors, INC | Tallahassee | FL | — | ◇ UNVERIFIED |
| DMDayco Manufacturing, Inc | Clayton | NC | — | ◇ UNVERIFIED |
| DMDaytona Moptorsport, INC. | Daytona Beach | FL | — | ◇ UNVERIFIED |
| DADba Advanced Manufacturing Svcs | Torrance | CA | — | ◇ UNVERIFIED |
| DEDcdidit Enterprise LLC Dba Ididit INC | Tecumseh | MI | — | ◇ UNVERIFIED |
| DIDecostar Industries, INC. | Mccalla | AL | — | ◇ UNVERIFIED |
| DMDecuir Manufacturing CORP | Fallbrook | CA | — | ◇ UNVERIFIED |
| DEDee Engineering | Ontario | CA | — | ◇ UNVERIFIED |
| DFDelafield Fluid Technologies | Duarte | CA | — | ◇ UNVERIFIED |
| DLDe La Rosa Manufacturing INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
