| AIAfm Industries, INC | Anaheim | — | ● ACTIVE |
| APAg Products, INC. | Camarillo | — | ● ACTIVE |
A & J Manufacturing CO | Foothill Ranch | — | ● ACTIVE |
Allan Aircraft Supply Co., LLC | North Hollywood | — | ● ACTIVE |
All Materials Manufacturing CO LLC | Riverside | — | ● ACTIVE |
All New Stamping CO. | El Monte | — | ● ACTIVE |
Aloha Products, LLC | Jackson | — | ● ACTIVE |
| AAAlpha Aviation Components, INC. | North Hills | — | ● ACTIVE |
| AMAltamont Manufacturing, INC. | Livermore | — | ● ACTIVE |
Aluminum Precision Products INC | Santa Ana | — | ● ACTIVE |
Alvarado Manufacturing CO INC | Chino | — | ● ACTIVE |
Alvarado Micro Precision INC. | Vista | — | ● ACTIVE |
American Kal Enterprises, INC | Baldwin Park | — | ● ACTIVE |
American Metal Bearing CO | Garden Grove | — | ● ACTIVE |
American Precision Gear Company | Foster City | — | ● ACTIVE |
American Wire, INC | San Bernardino | — | ● ACTIVE |
| AIAmeriflex, INC. | Corona | 20–99 | ● ACTIVE |
Amex Plating, Incorporated | Santa Clara | — | ● ACTIVE |
Am Machining, INC. | Buena Park | — | ● ACTIVE |
Angeles Precision Engineering, INC. | Ontario | — | ● ACTIVE |
Anh Precision LLC | Costa Mesa | — | ● ACTIVE |
| AIAnillo Industries LLC | Orange | 100–499 | ● ACTIVE |
Anthony Gallien, INC | Livermore | — | ● ACTIVE |
Antrin Miniature Specialties, INC | Fallbrook | — | ● ACTIVE |
Apex Ht Manufacturing CORP | Santa Clara | — | ● ACTIVE |
Apl Manufacturing INC | Orange | — | ● ACTIVE |
Apm Manufacturing | Orange | — | ● ACTIVE |
Applied Ceramics, INC. | Fremont | — | ● ACTIVE |
Applied Composite Solutions Incorporated | Oceanside | — | ● ACTIVE |
Arch Medical Solutions - Sonora, LLC | Sonora | 20–99 | ● ACTIVE |
A & R Engineering Co., INC. | Carson | — | ● ACTIVE |
Argo Spring Manufacturing Co., INC. | Norwalk | — | ● ACTIVE |
A.s. Aerospace, INC. | Santa Clarita | — | ● ACTIVE |
Associated Plating CO INC | Santa Fe Springs | — | ● ACTIVE |
Astro Machine CO INC | Hawthorne | — | ● ACTIVE |
Atlas Specialty Products, LLC | Anaheim | — | ● ACTIVE |
Aubin Industries INC. | Tracy | — | ● ACTIVE |
| ARAutomotive Racing Products, INC | Ventura | 20–99 | ● ACTIVE |
| AMAvatar Machine, LLC | Fountain Valley | — | ● ACTIVE |
Axxis CORP | Perris | — | ● ACTIVE |
Azure Microdynamics, INC. | Foothill Ranch | — | ● ACTIVE |
Bal Seal Engineering, INC. | Foothill Ranch | — | ● ACTIVE |
Barken's Hardchrome, INC. | Compton | — | ● ACTIVE |
Bart Manufacturing, INC | Santa Clara | — | ● ACTIVE |
Bay Associates Wire Tech CORP | Fremont | — | ● ACTIVE |
B & B Manufacturing CO | Valencia | 100–499 | ● ACTIVE |
Bellows Manufacturing & Research, INC. | San Fernando | — | ● ACTIVE |
Bender Ccp, INC. | Vernon | — | ● ACTIVE |
Bendick Precision INC | Arcadia | — | ● ACTIVE |
Beranek, LLC | Torrance | — | ● ACTIVE |