 National Foam/west Chester | West Chester | — | ◇ UNVERIFIED |
| NANative American Environmental Technologies INC | Greentown | — | ◇ UNVERIFIED |
| NMNatl Milling Chemical CO | Philadelphia | — | ◇ UNVERIFIED |
| NSNatl Starch & Chem Co/hazleton | Hazleton | — | ◇ UNVERIFIED |
| NINaturetech-solutions INC | Lancaster | — | ◇ UNVERIFIED |
| NPNew Pig CORP | Tipton | — | ◇ UNVERIFIED |
| NON O Bonsall & Sons | Millerstown | — | ◇ UNVERIFIED |
| NCNuchem Corporation | Allentown | — | ◇ UNVERIFIED |
| NLNull's Liquid Chlorine, LLC | New Oxford | — | ◇ UNVERIFIED |
| OPOttawa Plt Food, INC | Carlisle | — | ◇ UNVERIFIED |
| PAPace Analytical Life Sciences Norristown | Norristown | — | ◇ UNVERIFIED |
| PCPaxar Corporation | Sayre | — | ◇ UNVERIFIED |
| PUPelgar USA Corporation | Saylorsburg | — | ◇ UNVERIFIED |
| PPPenn Protective Coatings | Huntingdon Valley | — | ◇ UNVERIFIED |
| PIPfizer Inc/w Conshohocken Plt | Conshohocken | — | ◇ UNVERIFIED |
| PMPharm Mfg Research Svc INC | Horsham | — | ◇ UNVERIFIED |
| PSPolymeric Systems INC. | Elverson | — | ◇ UNVERIFIED |
| PDPolyone Design Structures & Solutions Llc/donora Plt 1 | Donora | — | ◇ UNVERIFIED |
| PIPpg Industries | Folcroft | — | ◇ UNVERIFIED |
| PIPpg Industries INC | Springdale | — | ◇ UNVERIFIED |
| PRPpg - Research & Development Facility | Allison Park | — | ◇ UNVERIFIED |
| PMPrince Mfg Co/bowmanstown | Bowmanstown | — | ◇ UNVERIFIED |
| PGPrinceton Global Synthesis LLC | Levittown | — | ◇ UNVERIFIED |
| PGProcter & Gamble Mfg/hatboro | Hatboro | — | ◇ UNVERIFIED |
| PSProfrac Svcs LLC Smithfield Fac | Smithfield | — | ◇ UNVERIFIED |
| PSPruett Schaffer Chem Co/pgh | Pittsburgh | — | ◇ UNVERIFIED |
| PPPuritan Prod | Bethlehem | — | ◇ UNVERIFIED |
| QMQuigley Mfg INC Pharmaloz Div | Lebanon | — | ◇ UNVERIFIED |
| RTRanbar Technology INC | Glenshaw | — | ◇ UNVERIFIED |
| RIRaven Ind Inc/latrobe Ind Park | Latrobe | — | ◇ UNVERIFIED |
| RPRhone Poulenc Incorporated | Philadelphia | — | ◇ UNVERIFIED |
| RURohmax USA | Horsham | — | ◇ UNVERIFIED |
| RCRose Clnr/duncansville | Duncansville | — | ◇ UNVERIFIED |
| RORuetgers Organics Co/state College | State College | — | ◇ UNVERIFIED |
| SISabic Innovative Plastics/thorndale | Thorndale | — | ◇ UNVERIFIED |
| SBSafc Biosciences | Sinking Spring | — | ◇ UNVERIFIED |
| SNSchutz NA LLC | Philadelphia | — | ◇ UNVERIFIED |
| SCSensient Colors Inc/gibraltar | Birdsboro | — | ◇ UNVERIFIED |
| SPSentry Paint Tech | Darby | — | ◇ UNVERIFIED |
| SCSharp Clinical Services | Phoenixville | — | ◇ UNVERIFIED |
| SMSilberline Mfg Co/lansford Plt | Lansford | — | ◇ UNVERIFIED |
| SKSmith Kline Beecham Pharmaceuticals | Philadelphia | — | ◇ UNVERIFIED |
| SCSmittys Clean Scene Paxton St Clnr | Harrisburg | — | ◇ UNVERIFIED |
| SOSmooth on | Easton | — | ◇ UNVERIFIED |
| SUSolvay USA INC | Marcus Hook | — | ◇ UNVERIFIED |
| SPSos Products, CO. | East Greenville | — | ◇ UNVERIFIED |
| SPSovereign Pkg Group Inc/east Pikeland | Phoenixville | — | ◇ UNVERIFIED |
| STSpark Therapeutics INC. | Philadelphia | — | ◇ UNVERIFIED |
| SCSpecialty Chemical Systems, INC | Pottstown | — | ◇ UNVERIFIED |
| SPSpray Products | Upland | — | ◇ UNVERIFIED |
