| SSSunoco Service Station | Dover | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| TMTaylor & Messick - 325 Walt Messick Rd, Harrington | Harrington | DE | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| TDTilcon Delaware Gumboro | Frankford | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| TDTilcon Delaware, INC. - Terminal Avenue | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| TCTowne & Country Cleaners, INC | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| TMTri-county Materials | Dover | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| TTrugreen | Newport | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| VDVerizon Dover Soc | Dover | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| WIWalker, Irwin C. Jr Farm | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| WFWalkers Florist & Greenhouse INC | Hockessin | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| WLWilmington Leather Coatings | New Castle | DE | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| WPWilmington Piece Dye CO. (closed) | Wilmington | DE | Textile Mills313310 | — | ◇ UNVERIFIED |
| WFWinner Ford | Newark | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| WLW L Gore & Associates INC Otts Chapel Site | Newark | DE | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| WWWm Wilmington Hauling - Meter 2 | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| WBWorthy Brothers Pipeline CO | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| YIYrc INC. D/b/a Yrc Freight | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| 2P212 Pharma LLC | Newark | DE | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| 2L240 Lisa Dr | New Castle | DE | Furniture and Related Product Manufacturing337212 | 20-99 | ◐ LIKELY ACTIVE |
| 3N373 New Castle DE | New Castle | DE | Food Manufacturing311811 | 20-99 | ◐ LIKELY ACTIVE |
| AAAdventures Await Retreat | Houston | DE | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| ACAgile Cold Claymont LLC | Claymont | DE | — | — | ◐ LIKELY ACTIVE |
| ALAir Liquide Advanced Separations | Newport | DE | Chemical Manufacturing325220 | 100-499 | ◐ LIKELY ACTIVE |
| AUAlpteknik Usa, INC. | Wilmington | DE | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
Altium Packaging - Newark Plant | Newark | DE | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| AFAmick Farms, LLC DE Feedmill | Delmar | DE | Food Manufacturing311119 | 20-99 | ◐ LIKELY ACTIVE |
| ACAtlantic Contracting Services, LLC | Greenwood | DE | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |
| BPBrandywine Product Group International, INC. | Wilmington | DE | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
| BWBrew Works North | Wilmington | DE | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BIBrickner Industrial Ne INC | Claymont | DE | Fabricated Metal Product Manufacturing332919 | — | ◐ LIKELY ACTIVE |
| BBBridgeville Branch 33 | Bridgeville | DE | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| BMBWtek Medical | Newark | DE | Computer and Electronic Product Manufacturing334510 | 1-19 | ◐ LIKELY ACTIVE |
| CCCedar Creek Custom Cabinets, LLC | Harrington | DE | Furniture and Related Product Manufacturing337110 | — | ◐ LIKELY ACTIVE |
| CMClarios - Middletown DE | Middletown | DE | Electrical Equipment, Appliance & Component Manufacturing335911 | 100-499 | ◐ LIKELY ACTIVE |
| CClaymont | Claymont | DE | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| CFClaymont Food Co. | Claymont | DE | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| DADe248 Ametek, INC. Dba Ametek Surface Vision | Newark | DE | Computer and Electronic Product Manufacturing334513 | 1-19 | ◐ LIKELY ACTIVE |
| DADefense and Systems Newark DE | Newark | DE | Transportation Equipment Manufacturing336413 | 20-99 | ◐ LIKELY ACTIVE |
| DDDelaware Distilling Company | Rehoboth Beach | DE | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| DCDelmarva Corrugated Packaging | Dover | DE | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| DDDiamante Distillers | Bear | DE | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| DSDiamond State Meats, LLC | Rehoboth Beach | DE | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| DJD & J Custom Cutting LLC | Hartly | DE | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| DHDogfish Head Brewings & Eats | Rehoboth Beach | DE | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DPDover Plant | Dover | DE | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| DEDupont Electronic Materials Cmp, LLC | Wilmington | DE | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| ESEastern Shore Poultry Company, INC | Georgetown | DE | Food Manufacturing311615 | — | ◐ LIKELY ACTIVE |
Ensinger Inc. - Greenwood Operations | Greenwood | DE | Plastics and Rubber Products Manufacturing326130 | 20-99 | ◐ LIKELY ACTIVE |
| EHEssity Hydrofera LLC | Newark | DE | Plastics and Rubber Products Manufacturing326150 | 1-19 | ◐ LIKELY ACTIVE |
| EGEvarard Group LLC | Newark | DE | Food Manufacturing311991 | — | ◐ LIKELY ACTIVE |