| CRCalifornia Radomes, Inc. | Santa Clara | CA | — | ◇ UNVERIFIED |
| CUCarbures USA INC | Greenville | SC | — | ◇ UNVERIFIED |
| CDCavotec Dabico US INC | Costa Mesa | CA | — | ◇ UNVERIFIED |
| CCC C Aviation LLC | Opelika | AL | — | ◇ UNVERIFIED |
| CCCcdi Composites INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| CZC&d Zodiac | Huntington Beach | CA | — | ◇ UNVERIFIED |
| CZC&d Zodiac - Cypress | Cypress | CA | — | ◇ UNVERIFIED |
| CZC&d Zodiac INC | Marysville | WA | — | ◇ UNVERIFIED |
| CZC&d Zodiac, INC. | La Palma | CA | — | ◇ UNVERIFIED |
| CBCee Bailey's Aircraft Plastics | Montebello | CA | — | ◇ UNVERIFIED |
| CACentral Air Service | Rantoul | KS | — | ◇ UNVERIFIED |
 Certified Aviation Services LLC | Ontario | CA | — | ◇ UNVERIFIED |
| CFCertified Fabricators INC | Buena Park | CA | — | ◇ UNVERIFIED |
| CACessna Aircraft CO the | Winfield | KS | — | ◇ UNVERIFIED |
| CAChandler Aviation Services, Inc. | Chandler | AZ | — | ◇ UNVERIFIED |
| CAChandler Aviation Services, Inc. | Chandler | AZ | — | ◇ UNVERIFIED |
| CEChemring Energetic Devices | Downers Grove | IL | — | ◇ UNVERIFIED |
| CMChipmasters Mfg | Azusa | CA | — | ◇ UNVERIFIED |
| CCChips Custom Painting INC | Fort Pierce | FL | — | ◇ UNVERIFIED |
 Cirrus Design Corporation Dba Cirrus Aircraft | Duluth | MN | — | ◇ UNVERIFIED |
| CMClark Manufacturing INC. | Wellington | KS | — | ◇ UNVERIFIED |
| CIClintco Industries INC Dba Custom Aircraft Parts | El Cajon | CA | — | ◇ UNVERIFIED |
| CMC & M Machining LLC | Webb City | MO | — | ◇ UNVERIFIED |
| CACnc Aztec | San Diego | CA | — | ◇ UNVERIFIED |
| CCobham | Davenport | IA | — | ◇ UNVERIFIED |
| CACollins Aerospace | Haltom City | TX | — | ◇ UNVERIFIED |
| CACommercial Aircraft | Wichita | KS | — | ◇ UNVERIFIED |
| COComponent Operations Boeing Jacksonville | Jacksonville | FL | — | ◇ UNVERIFIED |
| CCompositec | Mission Viejo | CA | — | ◇ UNVERIFIED |
| CEComposite Engineering INC | Mcclellan | CA | — | ◇ UNVERIFIED |
 Composites Horizons INC | Covina | CA | — | ◇ UNVERIFIED |
| CACornwell Aerospace Services, LLC | Saint Peters | MO | — | ◇ UNVERIFIED |
| CACox Airparts, LLC | Wichita | KS | — | ◇ UNVERIFIED |
| CCCurtiss-wright Controls Integrated | City of Industry | CA | — | ◇ UNVERIFIED |
| CACustom Aircraft Cabinets, INC. | North Little Rock | AR | — | ◇ UNVERIFIED |
| DSDaa Seattle | Auburn | WA | — | ◇ UNVERIFIED |
| DADaher Aerospace | Stuart | FL | — | ◇ UNVERIFIED |
| DFDassault Falcon Jet-teb | Little Ferry | NJ | — | ◇ UNVERIFIED |
| DTDatabee Technologies, LLC | Southwest Ranches | FL | — | ◇ UNVERIFIED |
| DFDelta Flight Products, LLC - Atl Operations | Atlanta | GA | — | ◇ UNVERIFIED |
| DIDelta-Ray Industries, Inc. | Litchfield | CT | — | ◇ UNVERIFIED |
| DODepartment of Defense | Corpus Christi | TX | — | ◇ UNVERIFIED |
| DADixie Aerospace | Atlanta | GA | — | ◇ UNVERIFIED |
 D-j Engineering, INC. | Augusta | KS | — | ◇ UNVERIFIED |
| D-j Engineering INC - Bldg 4a (stormwater) | Augusta | KS | — | ◇ UNVERIFIED |
| D-j Engineering INC - Bldgs 5c & 5e (stormwater) | Augusta | KS | — | ◇ UNVERIFIED |
| D-j Engineering INC - East-1011 (stormwater) | Augusta | KS | — | ◇ UNVERIFIED |
| D-j Engineering INC - East-810 (stormwater) | Augusta | KS | — | ◇ UNVERIFIED |
| DMDowney Mfg INC | Downey | CA | — | ◇ UNVERIFIED |
| DADretloh Aircraft Supply | Anaheim | CA | — | ◇ UNVERIFIED |
