| OCOmega Chemical CORP Omega Reco | Whittier | — | ◇ UNVERIFIED |
| OEOmega Extruding CORP of Ca | Compton | — | ◇ UNVERIFIED |
| OSOmnipathology Solutions Medical CORP | Pasadena | — | ◇ UNVERIFIED |
| OSOmya Specialty Materials | Long Beach | — | ◇ UNVERIFIED |
| OBOneh2 Burbank Site | Burbank | — | ◇ UNVERIFIED |
| OLOneh2 Long Beach Site | Long Beach | — | ◇ UNVERIFIED |
| OGOptimal Growth Management INC Dba Optimal Genetics | Long Beach | — | ◇ UNVERIFIED |
| OCOrange County Chemical Supply Drum Site | Santa Fe Springs | — | ◇ UNVERIFIED |
| OBOrganic By Nature | Long Beach | — | ◇ UNVERIFIED |
| OBOriginal Balboa Caregivers INC | Chatsworth | — | ◇ UNVERIFIED |
| PLPactiv LLC | Santa Fe Springs | — | ◇ UNVERIFIED |
 Paint Chem INC Dba Trans Chem Coatings | Los Angeles | — | ◇ UNVERIFIED |
| PCPalisades Compounding Pharmacy | Pacific Palisades | — | ◇ UNVERIFIED |
| PIPanaceanano INC | Pasadena | — | ◇ UNVERIFIED |
| PAPan American Plastics INC | Commerce | — | ◇ UNVERIFIED |
| PLParagon Laboratories | Torrance | — | ◇ UNVERIFIED |
| PIParsan, INC. Dba Roscoe Fuel Station | Van Nuys | — | ◇ UNVERIFIED |
| PRParviz Rahimian and Shohreh Rashti, Trustees of THE RAHIMIAN FAMILY TRUST, dated | City of Santa Clarita (area of Valencia) | — | ◇ UNVERIFIED |
| PBPasadena Bio Collaborative Incubator | Pasadena | — | ◇ UNVERIFIED |
| PIPeprotech INC | Westlake Village | — | ◇ UNVERIFIED |
| PSPerimeter Solutions LP | Lancaster | — | ◇ UNVERIFIED |
| PSPerpetual Screen Printing INC | Los Angeles | — | ◇ UNVERIFIED |
| PCPerry Chemical Corporation | Rancho Dominguez | — | ◇ UNVERIFIED |
| PAPerson and Covey | Glendale | — | ◇ UNVERIFIED |
| PFP F I INC | Santa Fe Springs | — | ◇ UNVERIFIED |
| PPgs360 | City of Industry | — | ◇ UNVERIFIED |
| PIPharmaca Integrative Pharmacy | Santa Monica | — | ◇ UNVERIFIED |
| PIPharmaca Integrative Pharmacy | Beverly Hills | — | ◇ UNVERIFIED |
| PLPharmavite LLC | Valencia | — | ◇ UNVERIFIED |
| PCPhysician Compounding | Beverly Hills | — | ◇ UNVERIFIED |
| PCPilot Chemical of California | Santa Fe Springs | — | ◇ UNVERIFIED |
| PJP J Maintenance Services INC | City of Industry | — | ◇ UNVERIFIED |
| PCPlastic Color CORP of Ca | Sun Valley | — | ◇ UNVERIFIED |
| PRPlastics Research CORP | Santa Fe Springs | — | ◇ UNVERIFIED |
| PDPl Development | Lynwood | — | ◇ UNVERIFIED |
| PDPl Developments Dc | Lynwood | — | ◇ UNVERIFIED |
| PLPleiadian Light LLC | Los Angeles | — | ◇ UNVERIFIED |
| PIPolycell Int'l CORP | Cerritos | — | ◇ UNVERIFIED |
| PCPolyone Corp, Diversified Compounders in | Los Angeles | — | ◇ UNVERIFIED |
| POPoly One Corporation | Carson | — | ◇ UNVERIFIED |
| PTPoly Tech | City of Industry | — | ◇ UNVERIFIED |
| PPPomona Precision Grinding INC | Pomona | — | ◇ UNVERIFIED |
| PAPortillos Auto Repair | Los Angeles | — | ◇ UNVERIFIED |
| PLPositive Lab Services, INC. | Los Angeles | — | ◇ UNVERIFIED |
| PCPq Corporation | South Gate | — | ◇ UNVERIFIED |
| PWPratt & Whitney Rocketdyne, INC. | Canoga Park | — | ◇ UNVERIFIED |
| PWPratt & Whitney Rocketdyne/ruby Acq Ent | Canoga Park | — | ◇ UNVERIFIED |
| PDPraxair Distribution INC | Torrance | — | ◇ UNVERIFIED |
| PDPraxair Distribution Incorporated | Los Angeles | — | ◇ UNVERIFIED |
| PIPraxair INC | Wilmington | — | ◇ UNVERIFIED |
