 Contech Engineered Solutions | Wahoo | NE | — | ◇ UNVERIFIED |
| Contech Engineered Solutions LLC | Mitchell | IN | — | ◇ UNVERIFIED |
| CFContract Fabricators, Inc, Iuka Facility | Iuka | MS | — | ◇ UNVERIFIED |
| CIContract Industrial Tooling | Richmond | IN | — | ◇ UNVERIFIED |
| CMContractors Materials LLC | New Castle | DE | — | ◇ UNVERIFIED |
| C1Corbin 1, LLC | Deland | FL | — | ◇ UNVERIFIED |
| CICorchran INC | Waseca | MN | — | ◇ UNVERIFIED |
 Cornerstone Fabricating & Construction Plt 1 | Hemlock | MI | — | ◇ UNVERIFIED |
| CRCornerstone Rack and Tooling, LLC | Lawrenceburg | TN | — | ◇ UNVERIFIED |
| CMCoronado Manufacturing LLC | Sun Valley | CA | — | ◇ UNVERIFIED |
| CRCovanta Resource Recovery Facility | Pittsfield | MA | — | ◇ UNVERIFIED |
| CTCoyne Textile Services | Cleveland | OH | — | ◇ UNVERIFIED |
| CMCPH Manufacturing Corp. | Loudon | NH | — | ◇ UNVERIFIED |
| CPCPH Program & Machine Tool Design Corp. | Nashua | NH | — | ◇ UNVERIFIED |
| CMCq+ Mfg Group | Machesney Park | IL | — | ◇ UNVERIFIED |
| CACraigs Auto Repair & Service | Birmingham | IA | — | ◇ UNVERIFIED |
| CMCramar Machining, LLC | Raymond | NH | — | ◇ UNVERIFIED |
| CFCreative Fabrication, INC | Covington | VA | — | ◇ UNVERIFIED |
| CMCreed Monarch, INC. | New Britain | CT | — | ◇ UNVERIFIED |
| CICrossover INC | Independence | LA | — | ◇ UNVERIFIED |
| CMCrosswind Machining INC | Grass Valley | CA | — | ◇ UNVERIFIED |
| CSC S C INC | Medford | OR | — | ◇ UNVERIFIED |
| CSC & S Machine CO INC | East Providence | RI | — | ◇ UNVERIFIED |
| CTCtek Tool & Machine Co | Cincinnati | OH | — | ◇ UNVERIFIED |
| CCCurtiss-wright CORP | Wood Ridge | NJ | — | ◇ UNVERIFIED |
| CPCustom-bilt Products INC | Fairfield | AL | — | ◇ UNVERIFIED |
| CGCustom Grinders Sales, INC. | Chatsworth | GA | — | ◇ UNVERIFIED |
| CMCustom Metal Fabricators, INC. | Lake Charles | LA | — | ◇ UNVERIFIED |
| CMCustom Metal Fabricators, INC. | Garden City | GA | — | ◇ UNVERIFIED |
| CMCustom Mold - Design LLC | Forest Lake | MN | — | ◇ UNVERIFIED |
| CECutting Edge Plasma LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| CWC & W Quality Products Corporation | Owensboro | KY | — | ◇ UNVERIFIED |
| CCytiva | Westborough | MA | — | ◇ UNVERIFIED |
| DFDabar Fab CO | Vero Beach | FL | — | ◇ UNVERIFIED |
| DMDarby Metalworks | Anderson | SC | — | ◇ UNVERIFIED |
| DDDay Dex CO. | Miami | FL | — | ◇ UNVERIFIED |
| DCD C Machining, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| DDD & D Design Manufacturing INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| DSDelo Screw Products | Delaware | OH | — | ◇ UNVERIFIED |
| DIDelta Industrial Dba Delta Modtech | Ramsey | MN | — | ◇ UNVERIFIED |
| DODelta Oilfield Tank Company, LLC | Fort Morgan | CO | — | ◇ UNVERIFIED |
| DPDelta Precision Tool & Inst CO | Hauppauge | NY | — | ◇ UNVERIFIED |
| DPDemco Products | Oak Lawn | IL | — | ◇ UNVERIFIED |
| DADennison Automatics | Nunica | MI | — | ◇ UNVERIFIED |
| DWDentoni's Welding Works, INC. | Stockton | CA | — | ◇ UNVERIFIED |
| DADesign and Fabricating INC | Cokato | MN | — | ◇ UNVERIFIED |
| DADesign and Fabricating INC | Cokato | MN | — | ◇ UNVERIFIED |
 Design Engineering & Manufacturing CO | Braham | MN | — | ◇ UNVERIFIED |
| DMDesign Machine | Sacramento | CA | — | ◇ UNVERIFIED |
| DBDeterman Brownie INC - Nassau St | Minneapolis | MN | — | ◇ UNVERIFIED |
| DCDeutsch CO Metal Components D | Gardena | CA | — | ◇ UNVERIFIED |
| DMDevincenzi Metal Products | Burlingame | CA | — | ◇ UNVERIFIED |
| DMDevin Mfg., INC. | Arcade | NY | — | ◇ UNVERIFIED |
| DTDh Technology INC | San Jose | CA | — | ◇ UNVERIFIED |
| DDiamodent | Anaheim | CA | — | ◇ UNVERIFIED |
| DWdiverse welding & fabrication | Gordonville | PA | — | ◇ UNVERIFIED |
| DCDiversified Components INC | Jamestown | NY | — | ◇ UNVERIFIED |
| DMDiversified Metal Products, INC | Idaho Falls | ID | — | ◇ UNVERIFIED |
| DMDixie Machine LLC | Holly | MI | — | ◇ UNVERIFIED |
| DVDixon Valve | Westmont | IL | — | ◇ UNVERIFIED |
| DMDl Machining, INC. | San Jose | CA | — | ◇ UNVERIFIED |
| DLDMK Lapidary, L.L.C. | Waterville | MN | — | ◇ UNVERIFIED |
| DMD.m. Manufacturing, INC. | Beloit | WI | — | ◇ UNVERIFIED |
 Donaldson CO Western Filter Div | Valencia | CA | — | ◇ UNVERIFIED |
| DIDoranco INC | North Attleboro | MA | — | ◇ UNVERIFIED |
| DSDoudney Sheet Metal Works INC. | Miami | FL | — | ◇ UNVERIFIED |
| DPDowels Pins & Shafts INC | Clearwater | FL | — | ◇ UNVERIFIED |
 D.p. Industries, INC. | Placeholder | CA | — | ◇ UNVERIFIED |
| DEDragon Esp Ltd- Steel Plate Manufacturing Plant | Provo | UT | — | ◇ UNVERIFIED |
| DPDragon Products | La Porte | TX | — | ◇ UNVERIFIED |
| DCDroitcour Company Cone Dept | Warwick | RI | — | ◇ UNVERIFIED |
| DSD & S Machine Products, INC | Aurora | IN | — | ◇ UNVERIFIED |
| DEDuke Empirical, INC. | Santa Cruz | CA | — | ◇ UNVERIFIED |
| DEDunlap East LLC | Yucaipa | CA | — | ◇ UNVERIFIED |
 Duramax Marine Industries | Norwalk | OH | — | ◇ UNVERIFIED |
 Duratech Industries | Bangor | WI | — | ◇ UNVERIFIED |
| DMDurco Manfacturing CO. INC | Waterbury | CT | — | ◇ UNVERIFIED |
| DFDurden Fabrication and Supply, LLC | Canton | GA | — | ◇ UNVERIFIED |
| DCDuroweld CO INC | Lake Bluff | IL | — | ◇ UNVERIFIED |
| DMDyna Mek CORP | La Vergne | TN | — | ◇ UNVERIFIED |
| DADynamic Air Technology INC | Pomona | CA | — | ◇ UNVERIFIED |
| DMDynamic Metal Processing Corporation | Hyde Park | PA | — | ◇ UNVERIFIED |
| DCDynaroll CORP | Sylmar | CA | — | ◇ UNVERIFIED |
| ETEagle Tanks INC | Aumsville | OR | — | ◇ UNVERIFIED |
| EWEagle Welding & Fabricating, INC. | Willoughby | OH | — | ◇ UNVERIFIED |
| ECEastern Cast Hardware CO INC | West Springfield | MA | — | ◇ UNVERIFIED |
| EMEastern Machine & Design | Hanson | MA | — | ◇ UNVERIFIED |
| EIEast Island Swiss Products INC | Deer Park | NY | — | ◇ UNVERIFIED |
| EAEaton Aerospace | Rumford | RI | — | ◇ UNVERIFIED |
| EHEaton Hydraulics | Petersburg | IL | — | ◇ UNVERIFIED |
| ECEcb Corporation | West Sacramento | CA | — | ◇ UNVERIFIED |
| ECEckhoffs Custom Machining INC | New London | MN | — | ◇ UNVERIFIED |
| ECElden Cylinder Testing INC | Taylor | MI | — | ◇ UNVERIFIED |
| EMElkins Machine & Tool Company INC | Romulus | MI | — | ◇ UNVERIFIED |
| EPElliott's Precision Machine & Tool, INC. | Flintstone | GA | — | ◇ UNVERIFIED |
| EFEmerson Fabrication Group LLC | Oneonta | AL | — | ◇ UNVERIFIED |
| EIEM Industries LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| EIEmpire Industrial Fabricators CORP | Albany | NY | — | ◇ UNVERIFIED |
 Enerfab Power - Industrial INC | Calvert City | KY | — | ◇ UNVERIFIED |
| EIEnerfin, Incorporated | Broken Arrow | OK | — | ◇ UNVERIFIED |
