| AIArkema Inc/west Chester | West Chester | 20–99 | ● ACTIVE |
Fujirebio Diagnostics, INC | Malvern | — | ● ACTIVE |
| VAVeltek Associates INC | Malvern | 100–499 | ● ACTIVE |
| JMJohnson Matthey INC. | West Chester | 100–499 | ● ACTIVE |
Nordic Pharma, INC. | Berwyn | — | ● ACTIVE |
Agc Chemicals Americas, INC. | Exton | — | ● ACTIVE |
Birch Biotech LLC | Exton | — | ● ACTIVE |
Crystron Technologies INC | Chesterbrook | — | ● ACTIVE |
Edw Pharma, INC | Paoli | — | ● ACTIVE |
| EUEndo Usa, INC. | Malvern | 100–499 | ● ACTIVE |
| GIGarbobio INC | Paoli | — | ● ACTIVE |
Hycult Biotech INC | Wayne | — | ● ACTIVE |
| MTMolecular Targeting Technologies, INC. | West Chester | — | ● ACTIVE |
Neuraptive Therapeutics, INC. | Chesterbrook | — | ● ACTIVE |
Pleopharma, INC. | Malvern | — | ● ACTIVE |
Puresyn, INC. | Malvern | — | ● ACTIVE |
Shannon Chemical Corporation | Exton | — | ● ACTIVE |
Verrica Pharmaceuticals INC. | West Chester | — | ● ACTIVE |
| WCWhitford Corp/elverson | Elverson | — | ◐ LIKELY ACTIVE |
| CPChemstation Philadelphia | Downingtown | — | ◐ LIKELY ACTIVE |
| FIForce Industries | Paoli | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey INC Downingtown Site | Downingtown | — | ◐ LIKELY ACTIVE |
| EIEisai Inc (215) | Exton | 20–99 | ◐ LIKELY ACTIVE |
| JBJanssen Biotech, INC. | Malvern | — | ◐ LIKELY ACTIVE |
| OAOxford Auto Body/oxford | Oxford | — | ◐ LIKELY ACTIVE |
| SCScotts Company Potting Soil Facility | Avondale | — | ◐ LIKELY ACTIVE |
| TSThe Scotts Company - Oxford | Oxford | 20–99 | ◐ LIKELY ACTIVE |
| ACAutomotive Coachworks Inc/oxford | Oxford | — | ◐ LIKELY ACTIVE |
| CMCatalent Micron Technologies Malvern Facility | Malvern | — | ◐ LIKELY ACTIVE |
| JBJanssen Biotech INC | Malvern | — | ◐ LIKELY ACTIVE |
| NINetzsch INC | Exton | — | ◐ LIKELY ACTIVE |
| ALAir Liquide America CORP Coatesville Asu | Coatesville | — | ◇ UNVERIFIED |
| CMCookson Matthey/west Chester | West Chester | — | ◇ UNVERIFIED |
| CACrazy Aaron Enterprises/east Pikeland | Phoenixville | — | ◇ UNVERIFIED |
| FGFlint Group | Lionville | — | ◇ UNVERIFIED |
| FGFlint Group North America | Exton | — | ◇ UNVERIFIED |
| HLHimedia Laboratories LLC | Lincoln University | — | ◇ UNVERIFIED |
| KFKidde Fire Fighting INC | West Chester | — | ◇ UNVERIFIED |
| LELnp Engineering Plastics | Thorndale | — | ◇ UNVERIFIED |
National Foam/west Chester | West Chester | — | ◇ UNVERIFIED |
| PSPolymeric Systems INC. | Elverson | — | ◇ UNVERIFIED |
| SISabic Innovative Plastics/thorndale | Thorndale | — | ◇ UNVERIFIED |
| SCSharp Clinical Services | Phoenixville | — | ◇ UNVERIFIED |
| SPSovereign Pkg Group Inc/east Pikeland | Phoenixville | — | ◇ UNVERIFIED |
| VFVanguard / Frazer | Frazer | — | ◇ UNVERIFIED |
| WCWhitford CORP | Frazer | — | ◇ UNVERIFIED |
| WPWyeth Pharmaceuticals/west Chester | West Chester | — | ◇ UNVERIFIED |
| ALAlmirall LLC | Malvern | — | ◐ LIKELY ACTIVE |
| CSChem Service Inc | West Chester | 1–19 | ◐ LIKELY ACTIVE |
Fujirebio Diagnostics Inc., Malvern | Malvern | 100–499 | ◐ LIKELY ACTIVE |