| JMJm Maufacturing CO. | Cochranton | PA | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| KKansas | Caney | KS | Plastics and Rubber Products Manufacturing326122 | 500+ | ◐ LIKELY ACTIVE |
| LLacon | Lacon | IL | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| LLivermore | Calhoun | KY | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| LLondon | London | OH | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| LTLongo-en Tech Puerto Rico, LLC | Guaynabo | PR | Plastics and Rubber Products Manufacturing326122 | — | ◐ LIKELY ACTIVE |
| LLudlow | Ludlow | MA | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| MMadera | Madera | CA | Food Manufacturing311911 | 100-499 | ◐ LIKELY ACTIVE |
| MPMaverick Pipe/Zekelman Industries-Rantoul | Rantoul | IL | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| MMendota | Mendota | IL | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| MMuncy | Muncy | PA | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| NNapoleon | Napoleon | OH | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| NMNew Miami | Hamilton | OH | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| NCNorth Coast Conduit LLC | Erie | PA | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
Northwest Pipe Fittings, Inc. of Missoula, Montana | Missoula | MT | Plastics and Rubber Products Manufacturing326122 | 1-19 | ◐ LIKELY ACTIVE |
| NPNorthwest Polymers LLC | Molalla | OR | Plastics and Rubber Products Manufacturing326122 | 1-19 | ◐ LIKELY ACTIVE |
| NPNorthwest Polymers LLC (2) | Aurora | OR | Chemical Manufacturing325991 | 1-19 | ◐ LIKELY ACTIVE |
| NNPPFargo | Fargo | ND | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| OSOhio Steel Industries Inc - OSI Plastic Columbus | Columbus | OH | Plastics and Rubber Products Manufacturing326122 | 1-19 | ◐ LIKELY ACTIVE |
| OSOhio Steel Industries Inc - OSI Plastics Delaware | Delaware | OH | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| OOlympia | Olympia | WA | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| OOwosso | Owosso | MI | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPPerformance Pipe | Hagerstown | MD | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPPerformance Pipe - a Division of Chevron Phillips Chemical Company | Pryor | OK | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPPerformance Pipe Brownwood | Brownwood | TX | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPerry | Perry | GA | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| PFPerry Fiberglass OH | Elyria | OH | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PNPetroflex NA LLC | Gainesville | TX | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| PJPipelife Jetstream (2) | Siloam Springs | AR | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| PUPolyPipe USA | Erwin | TN | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPPonderosa Precision Plastics | La Porte | TX | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPortage | Portage | MI | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PCPrimary Colors, Inc | North Grafton | MA | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| PPulaski | Pulaski | TN | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| RPRidgeline Pipe Manufacturing | Eugene | OR | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| RCRPS Composites, Utah, Inc | North Salt Lake | UT | Plastics and Rubber Products Manufacturing326122 | 1-19 | ◐ LIKELY ACTIVE |
| SPSaint-Gobain PPL Mickleton | Mickleton | NJ | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| SLSalt Lake City | North Salt Lake | UT | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| SPSanderson Pipe | Houston | TX | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| SSanford | Sanford | FL | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| SSebring | Sebring | FL | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| SSSpears Santa Paula | Santa Paula | CA | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| SRSpecialty RTP - Conoco Philips site | Stafford | TX | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| SCSPIPP Contech Engineered Solutions LLC | Springfield | IL | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| SMStevensville, MT | Stevensville | MT | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| TPTeel Plastics-Industrial Court | Baraboo | WI | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |
| TMTownsend Mp LLC | Bellevue | WA | Plastics and Rubber Products Manufacturing326122 | — | ◐ LIKELY ACTIVE |
| USUnderground Supply West II LLC | Phoenix | AZ | Plastics and Rubber Products Manufacturing326122 | 1-19 | ◐ LIKELY ACTIVE |
| UAUponor - Apple Valley | Apple Valley | MN | Plastics and Rubber Products Manufacturing326122 | 500+ | ◐ LIKELY ACTIVE |
| UHUponor - Hutchinson | Hutchinson | MN | Plastics and Rubber Products Manufacturing326122 | 20-99 | ◐ LIKELY ACTIVE |