| KSKenlen Specialties INC | Fountain Valley | — | ◇ UNVERIFIED |
| KKKha Kenny Products INC. | Fountain Valley | — | ◇ UNVERIFIED |
| KIKim Iron Works INC | Fullerton | — | ◇ UNVERIFIED |
| KIKim's Iron Works, INC | Fullerton | — | ◇ UNVERIFIED |
| KJK & J Wire Products CORP | Stanton | — | ◇ UNVERIFIED |
| KTKT Tech, Inc. | Fullerton | — | ◇ UNVERIFIED |
| KCKwikset CORP | Anaheim | — | ◇ UNVERIFIED |
| LPLegacy Plating Mfg | Huntington Beach | — | ◇ UNVERIFIED |
| LSLemon Street, LLC | Orange | — | ◇ UNVERIFIED |
| LBLiberty Bolt | Garden Grove | — | ◇ UNVERIFIED |
| LGLiberty Gasket LLC | Mission Viejo | — | ◇ UNVERIFIED |
| LILinco Industries | Anaheim | — | ◇ UNVERIFIED |
| LELing Electronics INC Subs Mec | Anaheim | — | ◇ UNVERIFIED |
| LCLm Chrome CORP | Santa Ana | — | ◇ UNVERIFIED |
| LLLuvera LLC | Orange | — | ◇ UNVERIFIED |
| LSLuxury Sink Products CORP | Anaheim | — | ◇ UNVERIFIED |
| MDMachine Dynamics Ultra Precision Cnc Machining, INC. | Westminster | — | ◇ UNVERIFIED |
| MIMacias Iron Works | Anaheim | — | ◇ UNVERIFIED |
| MMMarkland Manufacturing INC | Santa Ana | — | ◇ UNVERIFIED |
| MMMarshal Machinery INC | San Clemente | — | ◇ UNVERIFIED |
| MWMason West, INC | Placentia | — | ◇ UNVERIFIED |
| MPM&D Precision Machining, Inc. | Garden Grove | — | ◇ UNVERIFIED |
| MBMedia Blast & Abrasives INC | Brea | — | ◇ UNVERIFIED |
| MOMendoza's Ornamental Iron | Fullerton | — | ◇ UNVERIFIED |
| MBMetal Bending Corporation | Anaheim | — | ◇ UNVERIFIED |
| MBMetal Bending Corporation | Orange | — | ◇ UNVERIFIED |
| MRMetalmade Raingutter & Sheetmetal INC | Irvine | — | ◇ UNVERIFIED |
| MPMetal Parts | Cypress | — | ◇ UNVERIFIED |
| MFMetro Fluid Connectors | Fullerton | — | ◇ UNVERIFIED |
| MCMicro Cooling Concepts, INC. | Huntington Beach | — | ◇ UNVERIFIED |
| MIMicrogon INC | Laguna Hills | — | ◇ UNVERIFIED |
| MAMicroport Aston Properties, LLC | Irvine | — | ◇ UNVERIFIED |
| MTMicro-technic Tool+stamp | Santa Ana | — | ◇ UNVERIFIED |
| MTMicro-technic Tool & Stamping CORP | Santa Ana | — | ◇ UNVERIFIED |
| MBMike Boone Properties, LLC, a California Limited Liability Company | Garden Grove | — | ◇ UNVERIFIED |
| MRMilford Rivet | Fullerton | — | ◇ UNVERIFIED |
 Mil Spec Heat Treating | Huntington Beach | — | ◇ UNVERIFIED |
| MVMission Viejo Ornamental Iron,r Honarvar | Rancho Sta Margarita | — | ◇ UNVERIFIED |
| MDMitchell & Duce INC Dba Mitchell Bros | Buena Park | — | ◇ UNVERIFIED |
| MEMJLJ Enterprises, LLC | Anaheim | — | ◇ UNVERIFIED |
| MIMkt Innovations | Placentia | — | ◇ UNVERIFIED |
| MAMm Aeros Precision INC | Garden Grove | — | ◇ UNVERIFIED |
| MSMmp Sheet Metal INC | La Habra | — | ◇ UNVERIFIED |
| MOModular Office System Powder Coating | Anaheim | — | ◇ UNVERIFIED |
| MCMonsanto Company | Anaheim | — | ◇ UNVERIFIED |
| MCMpp Company | Santa Ana | — | ◇ UNVERIFIED |
| MCM.p.p. Company, Michael Gerard Horist Db | Santa Ana | — | ◇ UNVERIFIED |
| MEM&r Engineering Company Dba D&b Plastics | Orange | — | ◇ UNVERIFIED |
| MEMunicipal Equipment Exporters INC Dba Max-life Mfg | Stanton | — | ◇ UNVERIFIED |
| NSNeutronic Stamping & Plating | Fountain Valley | — | ◇ UNVERIFIED |
