 A & D Precision Manufacturing, INC. | Anaheim | — | ● ACTIVE |
 Catalina Cylinders, INC. | Garden Grove | 20–99 | ● ACTIVE |
 Griswold Industries | Costa Mesa | 100–499 | ● ACTIVE |
 Interconnect Solutions CO LLC | Fountain Valley | 100–499 | ● ACTIVE |
 Kittyhawk INC | Garden Grove | 20–99 | ● ACTIVE |
 Alloy Die Casting CO. | Buena Park | — | ● ACTIVE |
 Dameron Alloy Foundries | Cypress | 1–19 | ● ACTIVE |
| DIDynalloy, INC. | Irvine | 20–99 | ● ACTIVE |
 Elite Machining & Engineering Services LLC | Yorba Linda | — | ● ACTIVE |
 Epson America INC | Los Alamitos | — | ● ACTIVE |
 Hyatt Die Cast and Engineering Corporation - South | Cypress | — | ● ACTIVE |
 Pcc Rollmet, INC | Irvine | — | ● ACTIVE |
 Bestwill Corporation | Irvine | — | ● ACTIVE |
| KSKomax Systems, INC. | Huntington Beach | — | ● ACTIVE |
| BTBrass Tech INC | Santa Ana | — | ◇ UNVERIFIED |
| MSMetal-fab Services Industry, INC | Anaheim | — | ◐ LIKELY ACTIVE |
| ARAll-met Recycling INC | Anaheim | — | ◐ LIKELY ACTIVE |
| DIDynacast, INC. | Lake Forest | 100–499 | ◐ LIKELY ACTIVE |
| TAThales Avionics INC CA | Irvine | 100–499 | ◐ LIKELY ACTIVE |
| AGAds Gold INC | Anaheim | — | ◇ UNVERIFIED |
| ABAmerimax Building Products, INC | Anaheim | — | ◇ UNVERIFIED |
| AEAnaheim Extrusion CO | Anaheim | — | ◇ UNVERIFIED |
| BIBarcel/cdt INC | Irvine | — | ◇ UNVERIFIED |
| CICeradyne INC 3m Company | Irvine | — | ◇ UNVERIFIED |
| CCCham Cal Engineering | Garden Grove | — | ◇ UNVERIFIED |
| IEInterstate Engineering | Anaheim | — | ◇ UNVERIFIED |
| LCLaminating Company of America | Garden Grove | — | ◇ UNVERIFIED |
| LSLitton Sys INC Kester Solder | Anaheim | — | ◇ UNVERIFIED |
| MMMcgraw Manufacturing INC | Anaheim | — | ◇ UNVERIFIED |
| UWUltra Wheel CO | Buena Park | — | ◇ UNVERIFIED |
| WIWeartech International INC | Anaheim | — | ◇ UNVERIFIED |
| 3F3-v Fastener Co., INC. | Brea | — | ◐ LIKELY ACTIVE |
| AWAccuright Wire EDM. | Santa Ana | — | ◇ UNVERIFIED |
| AIAlmanon INC | Santa Ana | — | ◇ UNVERIFIED |
 Aluminum Precision Products INC | Santa Ana | — | ◇ UNVERIFIED |
| Aluminum Precision Products INC | Santa Ana | — | ◇ UNVERIFIED |
| ABAran Bagher | Santa Ana | — | ◇ UNVERIFIED |
| BDBelt Drives LTD | Brea | — | ◇ UNVERIFIED |
| CMCasara Modern | Huntington Beach | — | ◇ UNVERIFIED |
| CSClay Smith Engineering INC | Buena Park | — | ◇ UNVERIFIED |
| CHConstruction Hotline and Management Partners, INC. | Santa Ana | — | ◇ UNVERIFIED |
| CWCove West Four Slide & Stamping CORP | Fullerton | — | ◇ UNVERIFIED |
| EEfinea | Los Alamitos | — | ◇ UNVERIFIED |
| EIElectrolurgymfg. INC. | Santa Ana | — | ◇ UNVERIFIED |
| Epson America INC | Huntington Beach | — | ◇ UNVERIFIED |
| EEEssex Electric INC | Anaheim | — | ◇ UNVERIFIED |
| FSFlores Steel Construction | Anaheim | — | ◇ UNVERIFIED |
| FHFox Hills Ind INC | Huntington Beach | — | ◇ UNVERIFIED |
| HDHyatt Die Cast & Engineering CORP | Garden Grove | — | ◇ UNVERIFIED |
| IMInnovative Metal Designs INC | Westminster | — | ◇ UNVERIFIED |
