| MBMetal Briquetting Company | Los Angeles | CA | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
 Metalor Technologies USA | Los Angeles | CA | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| MRMetal Resources INC | Fontanta | CA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| MSMetal Sales Manufacturing CORP | Woodland | CA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| MRMetech Recycling | Gilroy | CA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MMMichael Miraula | North Hollywood | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MMMicro Metals | Richmond | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MFMid-west Fabricating Co, West Bent Bolt | Santa Fe Springs | CA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| MCMike Clarksean & Diane Foran | Bakersfield | CA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| MIMiranda Iron Works Inc. | Lake Elsinore | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| MMMission Metals | Rialto | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
 M&l Precision Machining INC | Morgan Hill | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MSMonterey Sculpture Center | Sand City | CA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| MSM Stephens Mfg INC | Cudahy | CA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| MEMvi Engineering & Manufacturing INC | Ontario | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| NCNamasco Corporation | Santa Fe Springs | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| NSNanogen Solutions LLC | Hayward | CA | Primary Metal Manufacturing331311 | — | ◇ UNVERIFIED |
| NINanosd INC Energy Nanotechnology R&d | San Diego | CA | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| NCNational City Foundry | San Diego | CA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| NRNational Refining CORP | Orange | CA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| NWNational Wire & Cable CORP | Los Angeles | CA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| NSNet Shapes INC | Ontario | CA | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| NENew England Lead Burning Co, INC | San Leandro | CA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| NRNoranda Recycling INC | San Jose | CA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| OMOlympic Metal Cutting | Montebello | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| OCOntario Castings, Performance Aluminum Products, Reeds Patterns & Molds, R&S ... | Ontario | CA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| OJOunce Jewelry INC Dba Ounce Collection INC | Los Angeles | CA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| PHPacific Handy Cutter INC | Irvine | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PLPacific Lead Products INC | Vista | CA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Company | Berkeley | CA | Primary Metal Manufacturing331513 | — | ▲ REPORTED CLOSED |
| PSPacific Steel Casting Co-plant | Berkeley | CA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #1 | Berkeley | CA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #3 | Berkeley | CA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| PSPacific Steel Group | Bloomington | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| PCParamit Corporation | Morgan Hill | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| PEParamount Extrusions CO. | Paramount | CA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| PRParamount Roll & Forming, INC. | Adelanto | CA | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| PMPaul Matsumoto | Rio Linda | CA | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| PSPciw Steel CORP | San Diego | CA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PAPerformance Aluminum Products | Ontario | CA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| PMPerformance Machine LLC | Cerritos | CA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| PSPerimeter Solutions LP | Mcclellan | CA | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| PIPhibro-tech, INC. | Buttonwillow | CA | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
| PAPhysician's Automated Laboratory Dba Central Coast Pathology Laborator | San Luis Obispo | CA | Primary Metal Manufacturing331311 | — | ◇ UNVERIFIED |
| PSPmb Supply and Mfg INC | Chico | CA | Primary Metal Manufacturing331411 | — | ◇ UNVERIFIED |
| PMPmw Manufacturing | Industry | CA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| PEPowerhouse Entertainment LLC | North Hollywood | CA | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| PCPrecision Cast Products | Oakland | CA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
 Precision Founders, INC. Dba Pcc Structurals San Leandro | San Leandro | CA | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| PRProfessional Refinishing Org | La Puente | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
