| IAInvista Applied Research Centre | New Castle | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| LCLaidlaw Corporation | New Castle | DE | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| NJNews Journal CO | New Castle | DE | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| PCPtfe Compounds INC | New Castle | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| SPSpi Polyols INC. | New Castle | DE | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| SCStandard Chlorine of Delaware, INC. Superfund Site | New Castle | DE | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| TDTilcon Delaware, INC. - Terminal Avenue | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| WIWalker, Irwin C. Jr Farm | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| WLWilmington Leather Coatings | New Castle | DE | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| YIYrc INC. D/b/a Yrc Freight | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| 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 |
| FIFujifilm Imaging Colorants Inc. | New Castle | DE | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| LLLineage Logistics MTC, LLC | New Castle | DE | — | — | ◐ LIKELY ACTIVE |
| NHNew Hudson Facades - DE | New Castle | DE | Fabricated Metal Product Manufacturing332323 | 1-19 | ◐ LIKELY ACTIVE |
| SASatys Aftermarket Delaware LLC | New Castle | DE | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| SGSivad Group LLC | New Castle | DE | Machinery Manufacturing333413 | — | ▲ REPORTED CLOSED |
| BBBimbo Bakeries Usa, INC. | New Castle | DE | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| BBBlack Briar Investments, LLC | New Castle | DE | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| CMContractors Materials LLC | New Castle | DE | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| CMContractors Materials LLC Hot Mix Plt | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| DFDassault Falcon Jet-wilmington CORP | New Castle | DE | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| DCDatech Corporation | New Castle | DE | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| DPD.l. Plastics | New Castle | DE | Textile Mills313320 | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| MIMetal-Tech, Inc. | New Castle | DE | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MSMid-atlantic Steel, LLC | New Castle | DE | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| PTPenske Truck Leasing CO LP | New Castle | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| SFSpatz Fiberglass Products | New Castle | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| SCSyntec CORP | New Castle | DE | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| TPTechmer Pm | New Castle | DE | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| WFWilmington Fibre Specialty Company, INC. | New Castle | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
