| VBVarec Biogas - HB | Huntington Beach | 1–19 | ◐ LIKELY ACTIVE |
| WCWest Coast Facility | Orange | 20–99 | ◐ LIKELY ACTIVE |
| WMWinn-pallet Master, INC. | Anaheim | — | ◐ LIKELY ACTIVE |
| WUWittmann USA Inc | Placentia | 1–19 | ◐ LIKELY ACTIVE |
| SDStructures Development LLC | Huntington Beach | — | ◐ LIKELY ACTIVE |
| ATAce Tube Bending | Aliso Viejo | — | ◇ UNVERIFIED |
| AIAquatec International INC | Irvine | — | ◇ UNVERIFIED |
| DAD&d Aerospace Engineering | Garden Grove | — | ◇ UNVERIFIED |
| TPTri Precision Sheet Metal INC | Anaheim | — | ◇ UNVERIFIED |
| 5S5 Star Elevator Service INC Dba Schindler Elevator Corporation | Orange | — | ◇ UNVERIFIED |
| 6G625 Grand Ave | Santa Ana | — | ◇ UNVERIFIED |
| AAAai Acl Technologies | Santa Ana | — | ◇ UNVERIFIED |
| AMAbco Manufacturing Company | Stanton | — | ◇ UNVERIFIED |
| ACA C D INC | Santa Ana | — | ◇ UNVERIFIED |
| AEAdaptive Engineering & Fabrication, INC. | Placentia | — | ◇ UNVERIFIED |
| AGAdrina Group LLC Dba Monarch Bay Cleaners | Dana Point | — | ◇ UNVERIFIED |
| AWAdtec West INC | Orange | — | ◇ UNVERIFIED |
| AGAdvanced Ground Systems Engine | Anaheim | — | ◇ UNVERIFIED |
| AMAdvanced Mold Technology | Brea | — | ◇ UNVERIFIED |
| AMAdvanced Mold Technology | Brea | — | ◇ UNVERIFIED |
| AMAdvanced Mold Technology INC. | Brea | — | ◇ UNVERIFIED |
 Advanced Precision Machining | Costa Mesa | — | ◇ UNVERIFIED |
| ACAir Chem Sys INC | Huntington Beach | — | ◇ UNVERIFIED |
| AKAlan Kovacs | Orange | — | ◇ UNVERIFIED |
| ACAlertos Corporation | Laguna Woods | — | ◇ UNVERIFIED |
| ALAllison Lie | Westminster | — | ◇ UNVERIFIED |
| ALAllison Lie | Irvine | — | ◇ UNVERIFIED |
| AUAlmex Usa, INC. | Buena Park | — | ◇ UNVERIFIED |
| AAAmada America INC | Buena Park | — | ◇ UNVERIFIED |
| ACAmerican Civil Constructors West Coast LLC | Trabuco Canyon | — | ◇ UNVERIFIED |
 American Equipment Systems LLC Dba Facilities Engineering Systems | Anaheim | — | ◇ UNVERIFIED |
| AFAmerican Fuji Seal, INC. | Anaheim | — | ◇ UNVERIFIED |
 American Metal Bearing Company | Garden Grove | — | ◇ UNVERIFIED |
| AMAmerican Metal Engineering | Huntington Beach | — | ◇ UNVERIFIED |
| APAmerican Pneumatic Tools | Santa Ana | — | ◇ UNVERIFIED |
| AEAmtech Elevator | Mission Viejo | — | ◇ UNVERIFIED |
| AMAnaheim Mfg CO | Anaheim | — | ◇ UNVERIFIED |
| ACAnother Cleaners | Anaheim | — | ◇ UNVERIFIED |
| AMApplied Manufacturing Technologies, INC. | Anaheim | — | ◇ UNVERIFIED |
| ATAranda Tooling INC | Huntington Beach | — | ◇ UNVERIFIED |
| AMArdco Manufacturing INC | Brea | — | ◇ UNVERIFIED |
| AVAssociated Vacuum Services INC | Santa Ana | — | ◇ UNVERIFIED |
| ACAtlas Copco Jc Carter Pumps | Costa Mesa | — | ◇ UNVERIFIED |
| AMAtlas Magnetics INC | Anaheim | — | ◇ UNVERIFIED |
| AWAts Workholding INC | Rancho Santa Margari | — | ◇ UNVERIFIED |
| AIAuger Industries | Placentia | — | ◇ UNVERIFIED |
| ASAutolift Services, INC. | Los Alamitos | — | ◇ UNVERIFIED |
| AMAvenu Medical | San Juan Capistrano | — | ◇ UNVERIFIED |
| ASAxe Sheet Metal/lavang Technologies | Westminster | — | ◇ UNVERIFIED |
| BCBeach Cleaners LLC Dba: All World Cleaners | Anaheim | — | ◇ UNVERIFIED |
