| BSBest Stone Works of De, LLC | Wilmington | DE | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◇ UNVERIFIED |
| BCBill Cannons Garage INC | Selbyville | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| BWBj's Wholesale Club #0178 | Newark | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| BEBloom Energy Manufacturing Center Delaware | Newark | DE | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
 Bloom Energy - Plant #7 | Newark | DE | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| BSBlue Swan Wilmington | Wilmington | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| BGBoc Gases | Claymont | DE | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| BOBradford Orthopedics | Dover | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| BIBruce Industrial CO INC | New Castle | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| CBCarmines Body Shop INC | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| CEChemical Equipment Labs, INC. | Wilmington | DE | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| CEChemours - Edge Moor Plant | Wilmington | DE | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| CBChiquita Brands | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| CMChristiana Materials | Christiana | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CDChrome Deposit Corporation | Newark | DE | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| CLChrysler , LLC | Newark | DE | Transportation Equipment Manufacturing336110 | — | ◇ UNVERIFIED |
| CCClariant CORP Masterbatch Div | Milford | DE | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| CCCoastal Coating | Dover | DE | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| CCCoker Concrete | Dover | DE | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CPColony Pool Service INC. | Wilmington | DE | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| CLColor-box LLC | Harrington | DE | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| CMContractors Materials LLC - Heald Street | Wilmington | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CCCorrado Construction CO LLC | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CPC & P Auto Body Svc | Elsmere | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| CUCpi (aka Unisource Worldwide) | New Castle | DE | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CTCraig Technologies | Seaford | DE | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| CDCustom Decorative Mouldings | Greenwood | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| CICytec Industries INC. | New Castle | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DIDash in 1410 - Penn & Union | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| DADays Automotive | Newark | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| DBD & B Products / Multi-tech, INC | Georgetown | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| DPDelaware Park Racetrack & Casino | Wilmington | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DSDelaware Storage and Pipeline Company | Dover | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| DSDelaware Support Operations | Dover | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| DSDentsply Sirona | Milford | DE | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| DODover (city Of) Water Treatment Plant - 802 Long Point Rd, Dover | Dover | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| DRDow Reichhold Specialty Latex LLC (closed) | Dover | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DEDupont Electronic Materials Cmp, Llc-building 8 | Newark | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| DHDupont Hay Road Sludge Drying Site | Wilmington | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| EMEdgemoor Materials INC | Wilmington | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| EPEdgewell Personal Care | Dover | DE | Paper Manufacturing322291 | — | ◇ UNVERIFIED |
| EPEdgewell Personal Care - Plant 4 | Dover | DE | Paper Manufacturing322291 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Christiana Lab | Wilmington | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Engineering Development Lab | Wilmington | DE | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Glasgow Site | Newark | DE | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours - Holly Run Plant | Newport | DE | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| EMEmpower Materials | Newark | DE | Plastics and Rubber Products Manufacturing326113 | — | ◇ UNVERIFIED |
| EMEssential Minerals LLC - Lambson Plant | New Castle | DE | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| ENEvelyn N Hyland Dds | Felton | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| EEExpert Engine Exchange INC | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
