| Manufacturer | Phone | State | Country |
| P.D. George Company | 314-621-5700 | MO | USA |
| pal plast GmbH | +49 (0)6108 705-0 | - | Germany |
| Pantasote Polymers, Inc. | 201-393-0888 | NJ | USA |
| Patent Plastics Inc. | 865-992-9868 | TN | USA |
| PBI Performance Products, Inc. | 704-554-3378 | NC | USA |
| Peer Plastic | (8612) 522589 | - | Russia |
| Pelton Polymers Limited | +44 (0)1594 842406 | - | United Kingdom |
| Pemex Petroquímica | (01-921) 2-11-12-60 | - | Mexico |
| PENTAC Polymer GmbH | +49 6078 9323-0 | - | Germany |
| Perrite | 44 (0) 1925 810608 | - | United Kingdom |
| Perstorp Compounds, Inc. | 413-584-2472 | MA | USA |
| Perstorp UK Limited | +44 (0) 1925 643500 | - | United Kingdom |
| PETKIM Petrokimya Holding A.S. | 0232-616-32-40 (20) | - | Turkey |
| PETLIN (MALAYSIA) SDN BHD | 60-3-2051-7908 | - | Malaysia |
| Petrobras Energia SA | (54-11) 4344-7200 | - | Argentina |
| PETROKEN (Petroquimica Ensenada S.A.) | 54-11-4382-6342 | - | Argentina |
| Petromont | 514-640-6400 | - | Canada |
| PETRONAS Polymer Technology Center | 03-2331 3937 | - | Malaysia |
| Petroquim S.A. | (56-2) 351 6700 | - | Chile |
| Petroquimica Triunfo | 0800 15 48 88 | - | Brasil |
| P-Group Deutschland GmbH | +49(0)711/327000-0 | - | Germany |
| Phillips Sumika Polypropylene Company | 832-813-4100 | TX | USA |
| Phoenix Plastics Co., Inc. | 936-760-2311 | TX | USA |
| Pier One Polymers, Inc. | 586-493-7984 | MI | USA |
| Pinnacle Polymers | 985-535-2000 | LA | USA |
| PiO Kunststoffe GmbH & Co KG | 07 61-478 16-00 | - | Germany |
| Plantic Technologies Limited | +61 3 9353 7900 | - | Australia |
| Plaskolite West, Inc. | 800-562-8883 | CA | USA |
| Plaskolite, Inc. | 800-848-9124 | OH | USA |
| Plastcom | 00421 2 44 259 160 | - | Slovakia |
| Plastic Manufacturing Company | 214-330-8671 | TX | USA |
| Plastic Selection Group, Inc. | 614-464-2008 | OH | USA |
| Plastic Service Centers | 888-44-PLASTIC | MI | USA |
| PlastiComp, LLC | 507-454-4334 | MN | USA |
| Plastics Engineering Co. | 920-458-2121 | WI | USA |
| Plastiglas de Mexico S.A de C.V. | 52-55-5261-8263 | - | Mexico |
| PLASTIGREEN Compounds | 39-331-584310 | - | Italy |
| PlastxWorld Inc. | 904-493-6081 | FL | USA |
| PMC Group Polymer Products | 610-759-3690 | PA | USA |
| Polimeri Europa | 39 02 62551 | - | Italy |
| Poliolefinas Internacionales, C.A. POLINTER | (58261) 796.21.11 | - | Venezuela |
| Polipropileno de Venezuela, Propilven, S.A. | +58 (212) 2768454 | - | Venezuela |
| POLYCOMPO Co.,Ltd. | 03-5437-5618 | - | Japan |
| POLYETHYLENE MALAYSIA SDN BHD | 603-206 5960 | - | Malaysia |
| POLYFEA | +49 (0)7625 91 84 58 | - | Germany |
| Polykemi AB | 46-0-411-170-30 | - | Sweden |
| Polymer Compounders Limited | 0191 378 3737 | - | United Kingdom |
| Polymer Extruded Products, Inc. | 973-344-2700 | NJ | USA |
| Polymer Resources Ltd. | 800-243-5176 | CT | USA |
| Polymer Technology and Services, LLC | 615-898-1700 | TN | USA |
| PolyMirae | +82-2-2167-8955 | - | Korea |
PolyOne Corporation  | 866-PolyOne | OH | USA |
| PolyPacific Pty. Ltd. | +61 3 9793 6000 | - | Australia |
| PolyPak International | 877-738-2688 | CA | USA |
| Polyplastics Co., Ltd. | (81)3-3593-2441 | - | Japan |
| Polypropylene Malaysia Sdn Bhd | 609 5856700 | - | Malaysia |
| Polyram Ram-On Industries | 972-6-6499555 | - | Israel |
| Polyscope Polymers BV | 31-4647-63989 | - | The Netherlands |
| Polystyrene Australia Pty Ltd | (03) 9317 4077 | - | Australia |
| Polyurethane Specialties Company | 201-438-2325 | NJ | USA |
| Polyvel Inc. | 609-567-0080 | NJ | USA |
| PPG Industries, Inc. | 800-437-8318 | PA | USA |
| Precision Polymer Engineering Ltd. | 44 1254 295400 | - | United Kingdom |
| Premier Plastic Resins, Inc. | 877-777-4514 | MI | USA |
| Premix Thermoplastics, Inc. | 1-888-284-3304 | WI | USA |
| Premix, Inc. | 440-224-2181 | OH | USA |
| Prime Polymer Co., Ltd. | 81-3-6253-4500 | - | Japan |
| Prime PVC® | 800-643-6909 | IN | USA |
| Pro Polymers | 734-471-7193 | MI | USA |
| PROPILCO S.A. | (571) 5960220 | - | Colombia |
| Proquigel | 5511-418-3100 | - | Brazil |
| PTT Chemical Public Company Limited | 66 2348 6316 | - | Thailand |
| PTY Enterprises, INC | 800-441-8095 | CA | USA |
| Putsch Kunststoffe GmbH | +49 (0) 911 93 62 60 | - | Germany |
