| KMKoch Membrane Systems | San Diego | — | ◇ UNVERIFIED |
| KLKushwood LLC | Ontario | — | ◇ UNVERIFIED |
| KAKyowa America CORP | Irvine | — | ◇ UNVERIFIED |
| KAKyowa America Corporation | Costa Mesa | — | ◇ UNVERIFIED |
| LTLakin Tire West LLC | Santa Fe Springs | — | ◇ UNVERIFIED |
| LBLasco Bathware | Anaheim | — | ◇ UNVERIFIED |
| LTLatex Technology INC. | San Marcos | — | ◇ UNVERIFIED |
 Leggett & Platt INC | Ontario | — | ◇ UNVERIFIED |
| LMLeonard's Molded Products | Santa Clarita | — | ◇ UNVERIFIED |
| MPMarble Palace | Stockton | — | ◇ UNVERIFIED |
| MRMartin Rubber Corporation | La Habra | — | ◇ UNVERIFIED |
| MPMato Plastics INC. | Valencia | — | ◇ UNVERIFIED |
| MPMercury Plastics, INC. | City of Industry | — | ◇ UNVERIFIED |
| MUMicrodyn-nadir US INC | Goleta | — | ◇ UNVERIFIED |
| MMMillenium Molding INC | Fontana | — | ◇ UNVERIFIED |
| MRMission Rubber CO | Corona | — | ◇ UNVERIFIED |
| MRMitchell Rubber Products INC | Mira Loma | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass - Holly Rd | Adelanto | — | ◇ UNVERIFIED |
| NENational Environmental Fiberglass LLC | Adelanto | — | ◇ UNVERIFIED |
| NONational O-ring (dba Hutchinson Seal Corp) | Downey | — | ◇ UNVERIFIED |
| NPNelco Prod INC | Fullerton | — | ◇ UNVERIFIED |
| NANorth American Specialty Products LLC | Lodi | — | ◇ UNVERIFIED |
| NNorwesco | Merced | — | ◇ UNVERIFIED |
| OHOliver Health Care Packaging | Anaheim | — | ◇ UNVERIFIED |
| OPOmega Packaging Dba Comar | La Mirada | — | ◇ UNVERIFIED |
| OTO'neill Tube & Reel | Mira Loma | — | ◇ UNVERIFIED |
| PCPacific Coast Chemicals Company | Berkeley | — | ◇ UNVERIFIED |
| PPPacific Plastics INC | Brea | — | ◇ UNVERIFIED |
| PCPactiv Corporation - La Mirada | La Mirada | — | ◇ UNVERIFIED |
| PIParco INC | Ontario | — | ◇ UNVERIFIED |
| PIPark International Corporation | Long Beach | — | ◇ UNVERIFIED |
| PBP. B. Fiberglass Products INC | Sun Valley | — | ◇ UNVERIFIED |
| PPPeninsula Plastics Recycling INC | Turlock | — | ◇ UNVERIFIED |
| PMPerformance Materials CORP Dba Toray Performance Composite | Camarillo | — | ◇ UNVERIFIED |
| PPPeterson Products, INC | Belmont | — | ◇ UNVERIFIED |
| PSPhoenix Spas | Anderson | — | ◇ UNVERIFIED |
| PRPhx Recycling INC | Fowler | — | ◇ UNVERIFIED |
| PNPilkington North America Incorporated | Lathrop | — | ◇ UNVERIFIED |
| PAPirelli Armstrong Tire CORP | Hanford | — | ◇ UNVERIFIED |
| PDPlastic Dress Up CO | South El Monte | — | ◇ UNVERIFIED |
| PPPlastipak Packaging INC | Modesto | — | ◇ UNVERIFIED |
| PIPlastron Incorporated | City of Industry | — | ◇ UNVERIFIED |
| PCPolyair Corporation | Corona | — | ◇ UNVERIFIED |
| PPPolycell Packaging Corperation | Biola | — | ◇ UNVERIFIED |
| PLPolyclad Laminates INC | Elk Grove | — | ◇ UNVERIFIED |
 Polytek Development CORP | Pomona | — | ◇ UNVERIFIED |
| PLPrecision Label INC | Oceanside | — | ◇ UNVERIFIED |
| PMPrime Measurement Products LLC | City of Industry | — | ◇ UNVERIFIED |
| PAProtec Arisawa America INC | Vista | — | ◇ UNVERIFIED |
| PAPtm and W Industries Incorporated | Santa Fe Springs | — | ◇ UNVERIFIED |
