| DDD & D Design Manufacturing INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| DODelta Oilfield Tank Company, LLC | Fort Morgan | CO | — | ◇ 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 |
| DBDeterman Brownie INC - Nassau St | Minneapolis | MN | — | ◇ UNVERIFIED |
| DMDevincenzi Metal Products | Burlingame | CA | — | ◇ UNVERIFIED |
| DWdiverse welding & fabrication | Gordonville | PA | — | ◇ UNVERIFIED |
| DMDiversified Metal Products, INC | Idaho Falls | ID | — | ◇ UNVERIFIED |
| DMDixie Machine LLC | Holly | MI | — | ◇ UNVERIFIED |
| DMD.m. Manufacturing, INC. | Beloit | WI | — | ◇ UNVERIFIED |
| DSDoudney Sheet Metal Works INC. | Miami | FL | — | ◇ UNVERIFIED |
| DEDragon Esp Ltd- Steel Plate Manufacturing Plant | Provo | UT | — | ◇ UNVERIFIED |
| DPDragon Products | La Porte | TX | — | ◇ UNVERIFIED |
 Duramax Marine Industries | Norwalk | OH | — | ◇ UNVERIFIED |
 Duratech Industries | Bangor | WI | — | ◇ UNVERIFIED |
| DCDuroweld CO INC | Lake Bluff | IL | — | ◇ UNVERIFIED |
| DADynamic Air Technology INC | Pomona | CA | — | ◇ UNVERIFIED |
| DMDynamic Metal Processing Corporation | Hyde Park | PA | — | ◇ UNVERIFIED |
| ETEagle Tanks INC | Aumsville | OR | — | ◇ UNVERIFIED |
| EWEagle Welding & Fabricating, INC. | Willoughby | OH | — | ◇ UNVERIFIED |
| ECEastern Cast Hardware CO INC | West Springfield | MA | — | ◇ UNVERIFIED |
| ECEcb Corporation | West Sacramento | CA | — | ◇ UNVERIFIED |
| ECElden Cylinder Testing INC | Taylor | MI | — | ◇ UNVERIFIED |
| EFEmerson Fabrication Group LLC | Oneonta | AL | — | ◇ UNVERIFIED |
| EIEmpire Industrial Fabricators CORP | Albany | NY | — | ◇ UNVERIFIED |
 Enerfab Power - Industrial INC | Calvert City | KY | — | ◇ UNVERIFIED |
| EIEnerfin, Incorporated | Broken Arrow | OK | — | ◇ UNVERIFIED |
| EIEngage Industrial Solutions | Mansfield | TX | — | ◇ UNVERIFIED |
| EWEngineered Welding INC. | Anamosa | IA | — | ◇ UNVERIFIED |
| ELEpifab LLC | Upland | CA | — | ◇ UNVERIFIED |
| EME.s. Metal Fabrications, INC. | Terryville | CT | — | ◇ UNVERIFIED |
| EMEssence Metals LLC | Oceanside | CA | — | ◇ UNVERIFIED |
| ELEtched, LLC | Harrisonville | MO | — | ◇ UNVERIFIED |
| ECEutectic Corporation | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| ESExpress Services INC | Sacramento | CA | — | ◇ UNVERIFIED |
| FIFabex, INC. | Zachary | LA | — | ◇ UNVERIFIED |
| FMFabricated Metals INC | San Leandro | CA | — | ◇ UNVERIFIED |
| FAFabrication Associates, Inc. | Charlotte | NC | — | ◇ UNVERIFIED |
| FMFab-tech Machining, LLC | Millville | UT | — | ◇ UNVERIFIED |
| FCFabtron Corporation | Auburn | IN | — | ◇ UNVERIFIED |
| FSFairmont Service Center | Fairmont | WV | — | ◇ UNVERIFIED |
| FIFehrs Industrial Manufacturing INC. | Seminole | TX | — | ◇ UNVERIFIED |
 Fiba Technologies INC | Louisville | KY | — | ◇ UNVERIFIED |
| Fiba Technologies INC | Millbury | MA | — | ◇ UNVERIFIED |
| FIFin-x, INC | Owasso | OK | — | ◇ UNVERIFIED |
| FIFlexcon Industries | Randolph | MA | — | ◇ UNVERIFIED |
| FDFluid Design Products INC | Spokane | WA | — | ◇ UNVERIFIED |
| FMFluid Marine LLC | Auburn | WA | — | ◇ UNVERIFIED |
