| PCPetra Chemical CO | Dallas | TX | — | ◇ UNVERIFIED |
| P6Phillips 66 Caustic Scrubber Material | New Castle | DE | — | ◇ UNVERIFIED |
| PBPhillips Bros Plastics INC | Gardena | CA | — | ◇ UNVERIFIED |
| POPhotography Outlet Dba Backdrop Outlet | Oceanside | CA | — | ◇ UNVERIFIED |
| PSPhoto Systems INC | Dexter | MI | — | ◇ UNVERIFIED |
| PLPiedmont Lithium Carolinas, INC. - Kings Moun ** Inactive ** | Kings Mountain | NC | — | ◇ UNVERIFIED |
| PSPierce & Stevens CORP | Seabrook | NH | — | ◇ UNVERIFIED |
 Pierson Industries, INC. | Rockaway | NJ | — | ◇ UNVERIFIED |
| PIPilgrim Innovative Plastics LLC | Plymouth | MA | — | ◇ UNVERIFIED |
| PAPioneer Americas INC | Tacoma | WA | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC | Henderson | NV | — | ◇ UNVERIFIED |
| PAPioneer Americas LLC Dba Olin Chlor Alkali Tracy | Tracy | CA | — | ◇ UNVERIFIED |
| PIPiper Industries INC Wire Products Div | Memphis | TN | — | ◇ UNVERIFIED |
| PPPittsfield Plastics Engineering LLC | Pittsfield | MA | — | ◇ UNVERIFIED |
| PIPixel Imaging | Vista | CA | — | ◇ UNVERIFIED |
| PCP&K Custom Acrylics, Inc. | Malden | MA | — | ◇ UNVERIFIED |
| PTPlanter Technology INC | Hayward | CA | — | ◇ UNVERIFIED |
| PCPlastic Compounders, INC. | Cambridge | OH | — | ◇ UNVERIFIED |
| PDPlastic Design, INC. | N Chelmsford | MA | — | ◇ UNVERIFIED |
| PIPlastic Industries, INC. | Preston | ID | — | ◇ UNVERIFIED |
| PIPlastic Innovations, LLC | Jurupa Valley | CA | — | ◇ UNVERIFIED |
| PMPlastic Materials, INC | Macedonia | OH | — | ◇ UNVERIFIED |
| PMPlastic Molded Components | Cypress | CA | — | ◇ UNVERIFIED |
| PRPlastic Recycling INC | Indianapolis | IN | — | ◇ UNVERIFIED |
| PRPlastic Resources, Inc. | Cartersville | GA | — | ◇ UNVERIFIED |
| PRPlastic Restoration | Saint Elmo | IL | — | ◇ UNVERIFIED |
| PFPlastics Forming Enterprises | Merrimack | NH | — | ◇ UNVERIFIED |
| PSPlastic Solutions INC. | Bayport | NY | — | ◇ UNVERIFIED |
| PRPlastics Research CORP | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
 Plastic Technologies of Vermont, INC | Londonderry | NH | — | ◇ UNVERIFIED |
| PTPlastic Trends INC | Shelby Twp | MI | — | ◇ UNVERIFIED |
| PIPlastipak INC | Havre De Grace | MD | — | ◇ UNVERIFIED |
| PPPlastisol Products INC | Addison | IL | — | ◇ UNVERIFIED |
| PTPlymouth Technology, Inc. | Rochester Hills | MI | — | ◇ UNVERIFIED |
| PIP.m.c., INC. | Calhoun | GA | — | ◇ UNVERIFIED |
| POPmc Organometallix | Axis | AL | — | ◇ UNVERIFIED |
| PIPolyair Inter Pack INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| PLPolyCap LLC | Lebanon | VA | — | ◇ UNVERIFIED |
| PIPolycell Int'l CORP | Cerritos | CA | — | ◇ UNVERIFIED |
| PLPolyclad Laminates | Millbury | MA | — | ◇ UNVERIFIED |
| PPPolyethylene Plant | Deer Park | TX | — | ◇ UNVERIFIED |
| PCPolyexe Corporation | Brentwood | NH | — | ◇ UNVERIFIED |
| PDPolyflex Division of Flex Technologies | Baltic | OH | — | ◇ UNVERIFIED |
| PIPolygard INC | Tampa | FL | — | ◇ UNVERIFIED |
| PIPolygard INC | Marietta | GA | — | ◇ UNVERIFIED |
| PIPolygard INC Acworth | Acworth | GA | — | ◇ UNVERIFIED |
| PMPoly Marketing & Associates INC | Houston | TX | — | ◇ UNVERIFIED |
| PIPolymera INC | Hebron | OH | — | ◇ UNVERIFIED |
| PCPolymer Concentrates | Clinton | MA | — | ◇ UNVERIFIED |
| PIPolymeric Interconnect | Butte | MT | — | ◇ UNVERIFIED |
