| KCKuehne Chemical Company INC | New Castle | 20–99 | ● ACTIVE |
Franklin Fibre-lamitex CORP | Wilmington | — | ● ACTIVE |
Quip Laboratories INC | Wilmington | — | ● ACTIVE |
R. C. Fabricators, INC. | Wilmington | — | ● ACTIVE |
Advanced Materials Technology, INC | Wilmington | — | ● ACTIVE |
Af3, INC. | Bear | — | ● ACTIVE |
Another Chance LLC | Wilmington | — | ● ACTIVE |
| ASAqua Science LLC | Newark | — | ● ACTIVE |
Arkion Life Sciences LLC | New Castle | — | ● ACTIVE |
Chemax Manufacturing CORP | New Castle | — | ● ACTIVE |
Dupont De Nemours, INC. | Wilmington | — | ● ACTIVE |
Dupont Specialty Products Usa, LLC | Wilmington | — | ● ACTIVE |
Ekc Advanced Electronics Usa, LLC | Wilmington | — | ● ACTIVE |
Fairville Products INC | Wilmington | — | ● ACTIVE |
Imbibitive Technologies America, INC. | Wilmington | — | ● ACTIVE |
Incyte Corporation | Wilmington | — | ● ACTIVE |
| KUKalrez Usa, LLC | Newark | 100–499 | ● ACTIVE |
| LILignolix INC | Newark | — | ● ACTIVE |
Marlex Pharmaceuticals INC | New Castle | — | ● ACTIVE |
Nicelle Technologies INC | Camden | — | ● ACTIVE |
Sdix LLC | Newark | — | ● ACTIVE |
Sun Chemical | Newport | 100–499 | ◐ LIKELY ACTIVE |
| ATAgilent Techs INC Newport Site | Newport | — | ◐ LIKELY ACTIVE |
| CICroda, INC. Atlas Point Plant Site | New Castle | — | ◐ LIKELY ACTIVE |
| LRLiveo Research INC. | New Castle | 20–99 | ◐ LIKELY ACTIVE |
Noramco LLC | Wilmington | — | ◐ LIKELY ACTIVE |
| OCOrient Corporation of America | Seaford | — | ◐ LIKELY ACTIVE |
| VRVeolia - Red Lion Plant | New Castle | — | ◐ LIKELY ACTIVE |
| MLMedal L.p., Air Liquide | Newport | — | ◐ LIKELY ACTIVE |
| SPSpi Pharma INC | Lewes | — | ◐ LIKELY ACTIVE |
| IIIntervet INC. | Millsboro | — | ◇ UNVERIFIED |
| JPJohnson Polymer INC | Seaford | — | ◇ UNVERIFIED |
Af3, INC. | Seaford | — | ◐ LIKELY ACTIVE |
Sustainable Generation LLC | Wilmington | — | ◐ LIKELY ACTIVE |
| AMAdvanced Material Technology | Wilmington | — | ◐ LIKELY ACTIVE |
| ATAgilent Technologies INC | Wilmington | — | ◐ LIKELY ACTIVE |
| ALAgrorefiner, LLC | New Castle | 20–99 | ◐ LIKELY ACTIVE |
| ASAshland Specialty Ingredients G.p. | Wilmington | — | ◐ LIKELY ACTIVE |
| ASAwsm Solutions Delaware, LLC | Bear | — | ◐ LIKELY ACTIVE |
| BOBank of America, N.a. - Deerfield Campus | Newark | — | ◐ LIKELY ACTIVE |
| BSBioenergy- Seaford Micronutrient Plant | Seaford | — | ◐ LIKELY ACTIVE |
| BWBj's Wholesale Club #0115 | New Castle | — | ◐ LIKELY ACTIVE |
| CEClean Earth of New Castle | New Castle | — | ◐ LIKELY ACTIVE |
| DCDana Container, INC. | Wilmington | — | ◐ LIKELY ACTIVE |
| DSDiamond State Port Corporation - R/r Flood Controls | Wilmington | — | ◐ LIKELY ACTIVE |
| EDE.i Dupont De Nemours and Company | Wilmington | — | ◐ LIKELY ACTIVE |
| EDE.i. Du Pont De Nemours & Company | Newark | — | ◐ LIKELY ACTIVE |
| EIE I Dupont De Nemours - Experimental Station | New Castle | — | ◐ LIKELY ACTIVE |
| FCFmc Corporation | Newark | — | ◐ LIKELY ACTIVE |
General Chemical Corporation (closed) | Claymont | — | ◐ LIKELY ACTIVE |