| TGTrulite Glass & Alluminum Solutions | City of Industry | 20–99 | ◐ LIKELY ACTIVE |
| UMUnited Memorial Products, Whittier | Whittier | 20–99 | ◐ LIKELY ACTIVE |
| AIAnthony INC | Sylmar | — | ◐ LIKELY ACTIVE |
| OGOldcastle Glass INC Dba Downey Glass | Los Angeles | — | ◐ LIKELY ACTIVE |
| AEAero Engines INC | Los Angeles | — | ◇ UNVERIFIED |
| ALAndrew Lauren Surfaces | Santa Fe Springs | — | ◇ UNVERIFIED |
| ABAngelus Block CO INC | Sun Valley | — | ◇ UNVERIFIED |
| ABAtkinson Brick Company | Los Angeles | — | ◇ UNVERIFIED |
| AGAvalon Glass & Mirror CO | Carson | — | ◇ UNVERIFIED |
| BRBender Ready Mix INC | Santa Fe Springs | — | ◇ UNVERIFIED |
| BWBest Way Marble & Tile CO INC | Los Angeles | — | ◇ UNVERIFIED |
| CSCalifornia State University at Los Angeles | Los Angeles | — | ◇ UNVERIFIED |
| CCCalportland Company Lax Plant | Los Angeles | — | ◇ UNVERIFIED |
| CSCal St Univ Northridge | Northridge | — | ◇ UNVERIFIED |
| CCCastaic Clay Manufacturing Company Incorporated | Castaic | — | ◇ UNVERIFIED |
| CPCatalina Pacific Concrete CO Sun Valley Plant | Sun Valley | — | ◇ UNVERIFIED |
| CCCemex Construction Materials Pacific LLC | Bell | — | ◇ UNVERIFIED |
| CCCemex Construction Materials Pacific LLC | West Hollywood | — | ◇ UNVERIFIED |
| GCGainey Ceramics INC | La Verne | — | ◇ UNVERIFIED |
| GGGarner Glass | Claremont | — | ◇ UNVERIFIED |
| HRHolliday Rock Canoga Park 31 | Canoga Park | — | ◇ UNVERIFIED |
| HRHolliday Rock Company, INC | Littlerock | — | ◇ UNVERIFIED |
| HRHolliday Rock Company - Van Nuys | Van Nuys | — | ◇ UNVERIFIED |
| KSK Source INC. | Compton | — | ◇ UNVERIFIED |
| LGLibbey Glass INC | Industry | — | ◇ UNVERIFIED |
| LALos Angeles Plant 15 | Los Angeles | — | ◇ UNVERIFIED |
| LSLucas Site | La Puente | — | ◇ UNVERIFIED |
| NRNational Ready Mix Concrete | Van Nuys | — | ◇ UNVERIFIED |
| NRNational Ready Mix Concrete CO | Santa Clarita | — | ◇ UNVERIFIED |
| NRNational Ready Mix Concrete CO. | Los Angeles | — | ◇ UNVERIFIED |
| NRNational Ready Mixed Concrete CO | Irwindale | — | ◇ UNVERIFIED |
| NRNational Ready Mixed Concrete CO | Artesia | — | ◇ UNVERIFIED |
| NRNational Ready Mixed Concrete CO | Canoga Park | — | ◇ UNVERIFIED |
| PBPalmdale Batch Plant | Palmdale | — | ◇ UNVERIFIED |
| PPParamount Precast Design INC | Sun Valley | — | ◇ UNVERIFIED |
| PRParamount Ready Mix Concrete Plant 23 | Paramount | — | ◇ UNVERIFIED |
| PCPhilips Components Discrete P | Los Angeles | — | ◇ UNVERIFIED |
| PSPulp Studio INC | Gardena | — | ◇ UNVERIFIED |
| QCQuikrete - City of Industry, Ca Plant | La Puente | — | ◇ UNVERIFIED |
| QSQuikrete - Sun Valley, Ca Plant | Sun Valley | — | ◇ UNVERIFIED |
| RMReady Mix Gardena Plant 25 | Rosewood | — | ◇ UNVERIFIED |
| RPResco Products INC | Santa Fe Spgs | — | ◇ UNVERIFIED |
| SCSaint-gobain Containers | Los Angeles | — | ◇ UNVERIFIED |
| SCSaint-gobain Containers LLC | El Monte | — | ◇ UNVERIFIED |
| SCStandard Concrete Products INC | Santa Monica | — | ◇ UNVERIFIED |
| SWStanley Works Chatsworth Facility | Chatsworth | — | ◇ UNVERIFIED |
| TCTelic Company | Valencia | — | ◇ UNVERIFIED |
| ARAlameda Ready-Mix Plant | Los Angeles | 20–99 | ◐ LIKELY ACTIVE |
| BGBullseye Glass Co. Resource Center - LA | South Pasadena | 1–19 | ◐ LIKELY ACTIVE |
| CLCalifornia La Mirada 14600 Alondra Blvd | La Mirada | 20–99 | ◐ LIKELY ACTIVE |
