| THTenex Health INC | Lake Forest | — | ◐ LIKELY ACTIVE |
| TIThe Irvine Company | Irvine | 1–19 | ◐ LIKELY ACTIVE |
 Vanguard Electronics | Huntington Beach | 20–99 | ◐ LIKELY ACTIVE |
| WPWestern Precision Aero LLC | Garden Grove | 20–99 | ◐ LIKELY ACTIVE |
| WIWinonics INC Dba Bench 2 Bench | Fullerton | — | ◐ LIKELY ACTIVE |
| ZMZOLL Medical Corporation - Irvine, CA. | Irvine | 20–99 | ◐ LIKELY ACTIVE |
| AMAdvanced Micro Instruments INC | Costa Mesa | — | ◐ LIKELY ACTIVE |
| AApctoc | Placentia | — | ◐ LIKELY ACTIVE |
| CECartel Electronics, INC | Placentia | — | ◐ LIKELY ACTIVE |
| GLGeneral Linear Systems INC | Fullerton | 1–19 | ◐ LIKELY ACTIVE |
| PIPacific Image Technology INC | Anaheim | — | ◐ LIKELY ACTIVE |
 Ttm Technologies INC | Santa Ana | — | ◐ LIKELY ACTIVE |
| AGAll Green Electronics Recycling | Garden Grove | — | ◇ UNVERIFIED |
| AGAll Green Electronics Recycling | Tustin | — | ◇ UNVERIFIED |
| BIB I Technologies Corporation | Fullerton | — | ◇ UNVERIFIED |
| CLCentury Laminators INC | Anaheim | — | ◇ UNVERIFIED |
| CICherokee International INC | Tustin | — | ◇ UNVERIFIED |
| CACircuit Access INC | Orange | — | ◇ UNVERIFIED |
| CSConexant Systems INC | Newport Beach | — | ◇ UNVERIFIED |
| DDDynamic Details INC | Anaheim | — | ◇ UNVERIFIED |
| ECEndevco CORP | San Juan Capistrano | — | ◇ UNVERIFIED |
| EIEwastedisposal INC | Newport Beach | — | ◇ UNVERIFIED |
| FCFilter Concepts INC | Santa Ana | — | ◇ UNVERIFIED |
| GEGomtech, Electronics, INC. | Orange | — | ◇ UNVERIFIED |
| ICItt Corporation | Santa Ana | — | ◇ UNVERIFIED |
| KEKaiser Electroprecision | Irvine | — | ◇ UNVERIFIED |
| L3L 3 Interstate Electronics Corporation | Anaheim | — | ◇ UNVERIFIED |
| LMLinfinity Microelectronics INC | Garden Grove | — | ◇ UNVERIFIED |
| MOMeggit Orange County INC | Irvine | — | ◇ UNVERIFIED |
| MCMicrosemi CORP | Santa Ana | — | ◇ UNVERIFIED |
| MBMs Bellows | Huntington Beach | — | ◇ UNVERIFIED |
| NIN2 Imaging Systems LLC | Tustin | — | ▲ REPORTED CLOSED |
| NCNavigate Cardiac Structures | Lake Forest | — | ◇ UNVERIFIED |
| NPNelco Prod INC | Fullerton | — | ◇ UNVERIFIED |
| NRNh Research | Irvine | 20–99 | ◇ UNVERIFIED |
| PEPolara Engineering INC | Fullerton | — | ◇ UNVERIFIED |
| RDRacal Dana Instruments INC | Irvine | — | ◇ UNVERIFIED |
| SESafran Electronics & Defense Avionics USA LLC | Costa Mesa | — | ◇ UNVERIFIED |
| SCSanmina Corporation | Irvine | — | ◇ UNVERIFIED |
| SDSecurity & Detection Sys Cypress | Cypress | — | ◇ UNVERIFIED |
| SCSo Cal Edison CO | Stanton | — | ◇ UNVERIFIED |
| SCSolderworks CORP | Fountain Valley | — | ◇ UNVERIFIED |
| TCT C Cosmotronic INC Dba Cosmotronic | Irvine | — | ◇ UNVERIFIED |
| TBThe Boeing Company | Anaheim | — | ◇ UNVERIFIED |
| VCVelie Circuits INC | Costa Mesa | — | ◇ UNVERIFIED |
| VSVm Services INC | Anaheim | — | ▲ REPORTED CLOSED |
| ADAdaptive Digital Systems INC | Newport Beach | — | ◐ LIKELY ACTIVE |
 AquaPhoenix Scientific - CA - CA | Brea | 1–19 | ◐ LIKELY ACTIVE |
| ATAstronics Test Systems INC | Irvine | — | ◐ LIKELY ACTIVE |
 Audio Video Security Solutions | Anaheim | — | ◐ LIKELY ACTIVE |
