| LML & M Laminates & Marble | Phoenix | AZ | — | ◇ UNVERIFIED |
| LELnp Engineering Plastics INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| LMLouis Mack INC | Portland | ME | — | ◇ UNVERIFIED |
| LCLtl Color Compounders, INC | Morrisville | PA | — | ◇ UNVERIFIED |
| LBLuxury Baths of San Antonio LLC | San Antonio | TX | — | ◇ UNVERIFIED |
| LPLynn Plastics Company LLC | Lynn | MA | — | ◇ UNVERIFIED |
| LLyondellbasell | Mansfield | TX | — | ◇ UNVERIFIED |
| LALyondellbasell Advanced Polymers INC | Bedford | VA | — | ◇ UNVERIFIED |
 Mack Molding Company, INC. | Statesville | NC | — | ◇ UNVERIFIED |
| MPManner Polymers INC | Mount Vernon | IL | — | ◇ UNVERIFIED |
| MTManns Towing/pottstown | Pottstown | PA | — | ◇ UNVERIFIED |
| MLManstone LLC - 105 Talamine Ct | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MDMarble Designs of Texas | San Antonio | TX | — | ◇ UNVERIFIED |
| MMMarble Makers INC | Duarte | CA | — | ◇ UNVERIFIED |
| MMMarble Masters of Texas INC | Seguin | TX | — | ◇ UNVERIFIED |
| MQMarble Quarry INC | Mandeville | LA | — | ◇ UNVERIFIED |
| MPMarchem Pacific INC | Orange | CA | — | ◇ UNVERIFIED |
| MPMarchem Polyurethane Systems | Maryland Heights | MO | — | ◇ UNVERIFIED |
| MGMarshall Gruber Systems, INC. | Mansfield | TX | — | ◇ UNVERIFIED |
| MRMaster Recycling, INC. | Dade City | FL | — | ◇ UNVERIFIED |
| MMMathews Marble Mfg. | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MCMcneilus Composites Facility | Dexter | MN | — | ◇ UNVERIFIED |
| MIMesa Industries | Fort Smith | AR | — | ◇ UNVERIFIED |
| MPMicalline Products INC | Columbia | SC | — | ◇ UNVERIFIED |
| MCMichels Corporation | Brownsville | WI | — | ◇ UNVERIFIED |
| MFMiles Fiberglass and Composites | Oregon City | OR | — | ◇ UNVERIFIED |
| MFMiles Fiberglass and Plastics Site | Portland | OR | — | ◇ UNVERIFIED |
| MWMiller Waste Mills | Crockett | TX | — | ◇ UNVERIFIED |
| MWMiller Waste Mills Dba Rtp CO | Portage | WI | — | ◇ UNVERIFIED |
| MWMiller Waste Mills INC Dba Rtp Company | Winona | MN | — | ◇ UNVERIFIED |
| MUMinova USA INC | Bluefield | WV | — | ◇ UNVERIFIED |
| MCMitsubishi Chemical Carbon Fiber and Composites, INC. | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| MSMkg Single Family Subdivision | Nazareth | PA | — | ◇ UNVERIFIED |
| MDModern Dispersion | Leominster | MA | — | ◇ UNVERIFIED |
| MPModified Plastics INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass - Muskrat | Adelanto | CA | — | ◇ UNVERIFIED |
| MPMomentive Performance Materials USA LLC | Chino | CA | — | ◇ UNVERIFIED |
| MPMountainview Products LLC | Gresham | OR | — | ◇ UNVERIFIED |
| MCMuehlstein Compounded Products | Houston | TX | — | ◇ UNVERIFIED |
| MSMuseum Services Corporation | South Saint Paul | MN | — | ◇ UNVERIFIED |
| NENew England Plastics | Woburn | MA | — | ◇ UNVERIFIED |
| NRNew River Polymer LLC | Hillsville | VA | — | ◇ UNVERIFIED |
| NWNew Wave Plastics Sucessor Blue Ocean Plastics, LLC. | Cleveland | OH | — | ◇ UNVERIFIED |
| NNorthbrook | Evansville | IN | — | ◇ UNVERIFIED |
| NPNovella Plastics, Inc. | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| NSNursery Supplies INC | Orange | CA | — | ◇ UNVERIFIED |
| OFOdom Fiberglass INC. | Milton | FL | — | ◇ UNVERIFIED |
| OPOrc Plastics - Rostone | Lafayette | IN | — | ◇ UNVERIFIED |
| OGOrica Ground Support INC | Georgetown | KY | — | ◇ UNVERIFIED |
| OCOwens Corning | Adelanto | CA | — | ◇ UNVERIFIED |
