| MAMa53 Ametek Aerospace Products | Wilmington | MA | Chemical Manufacturing325992 | 20-99 | ◐ LIKELY ACTIVE |
| NMNova Medical INC | Wilmington | MA | Computer and Electronic Product Manufacturing334510 | — | ◐ LIKELY ACTIVE |
| NNuturell | Wilmington | DE | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| OCOlin Chemical Site | Wilmington | MA | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| OIOptogration, INC. | Wilmington | MA | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| PDPolygon Dynamics | Wilmington | NC | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| RARigaku Analytical Devices INC | Wilmington | MA | Computer and Electronic Product Manufacturing334516 | 20-99 | ◐ LIKELY ACTIVE |
| RSR.l.r. Sales, LLC | Wilmington | OH | Wood Product Manufacturing321920 | — | ◐ LIKELY ACTIVE |
| RARoyal Adhesives and Sealants, LLC | Wilmington | CA | Chemical Manufacturing325520 | — | ◐ LIKELY ACTIVE |
| RARudys Auto Body Shop | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| SFSheridan Ford Sales | Wilmington | DE | Chemical Manufacturing325222 | — | ◐ LIKELY ACTIVE |
| SLSkidmorecompanies, LLC | Wilmington | NC | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| SCSmyth Companies - Wilmington | Wilmington | MA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| TRTesoro Refining and Marketing Co., LLC - Los Angeles Refinery | Wilmington | CA | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
| TWTesoro Wilmington Sales Terminal | Wilmington | CA | Petroleum and Coal Products Manufacturing324191 | — | ◐ LIKELY ACTIVE |
| VOValero Olympic Tank Farm | Wilmington | CA | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
| VAValley Asphalt #18 - Portable | Wilmington | OH | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| AMAdvanced Material Technology | Wilmington | DE | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| CSCalifornia Sulphur Company | Wilmington | CA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| COCity of Wilmington Water Pollution Control Fac. | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| CCCovestro Coating Resins INC | Wilmington | MA | Paper Manufacturing322225 | — | ◐ LIKELY ACTIVE |
| DEDelrin Experimental Station | Wilmington | DE | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| DEDs Express Dismantling | Wilmington | CA | Petroleum and Coal Products Manufacturing324191 | — | ◐ LIKELY ACTIVE |
| HJH J Baker Bro INC | Wilmington | CA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| IPIko Production Wilmington INC. | Wilmington | DE | Petroleum and Coal Products Manufacturing324122 | — | ◐ LIKELY ACTIVE |
| ISIntercontinental Services of Delaware | Wilmington | DE | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| IPInternational Petroleum CORP | Wilmington | DE | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
| ICInterroll Corporation | Wilmington | NC | Machinery Manufacturing333922 | 100-499 | ◐ LIKELY ACTIVE |
| PIPotential Industries | Wilmington | CA | Textile Product Mills314999 | — | ◐ LIKELY ACTIVE |
| TGThink Green Delaware, INC | Wilmington | DE | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TTTransflo Terminal Service, INC | Wilmington | DE | Food Manufacturing311613 | — | ◐ LIKELY ACTIVE |
| VAVeterans Administration Hospital | Wilmington | DE | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| 3C3m CO Electrical Products Div | Wilmington | MA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| APAcme Printing | Wilmington | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| AMAig Marketing - 3 Beaver Valley Rd, Wilmington | Wilmington | DE | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ACAlcami Corporation | Wilmington | NC | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AIAlkermes INC | Wilmington | OH | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ASAmazon.com Services LLC Hmw1 | Wilmington | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| AIAmetek Inc., Chemical Products Division | Wilmington | DE | Textile Mills313221 | — | ◇ UNVERIFIED |
| ADAnalog Devices INC | Wilmington | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| AGAny Garment Cleaners #106 | Wilmington | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| AIApac-atlantic, INC. - Coastal Carolina | Wilmington | NC | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BCBasf CORP | Wilmington | NC | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| BSBest Stone Works of De, LLC | Wilmington | DE | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◇ UNVERIFIED |
| BEBledsoe Enterprises, INC. ** Inactive ** | Wilmington | NC | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BSBlue Swan Wilmington | Wilmington | DE | Chemical Manufacturing325211 | — | ◇ 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 |