| PMPrompt Machine Products, INC | Chatsworth | — | ● ACTIVE |
Pro-tek Manufacturing, INC. | Livermore | — | ● ACTIVE |
Prototek Digital Manufacturing (sacramento) LLC | Rancho Cordova | — | ● ACTIVE |
| QIQ3-cnc, INC | San Diego | — | ● ACTIVE |
Qap Metal Finishing, INC | Los Angeles | 20–99 | ● ACTIVE |
Qualitask, INC | Anaheim | — | ● ACTIVE |
Quality Grinding Co, INC. | Buena Park | — | ● ACTIVE |
Quality Machining & Design, INC. | San Jose | 20–99 | ● ACTIVE |
Quick Draw and Machining, INC. | Ventura | 1–19 | ● ACTIVE |
Rah Industries INC | Santa Clarita | — | ● ACTIVE |
Ramp Engineering INC | Paramount | — | ● ACTIVE |
Rapid Axis LLC | Redwood City | 1–19 | ● ACTIVE |
Rbc Lubron Bearing Systems, INC. | Santa Fe Springs | — | ● ACTIVE |
Rbc Transport Dynamics CORP | Santa Ana | — | ● ACTIVE |
Rb Machining, INC. | Palmdale | 1–19 | ● ACTIVE |
Reid Products INC. | Apple Valley | 20–99 | ● ACTIVE |
Republic Brass Sales INC. | Lemon Grove | — | ● ACTIVE |
Responsible Metal Fab INC | Sunnyvale | — | ● ACTIVE |
| RSReynolds Systems, INC | Middletown | 20–99 | ● ACTIVE |
Richards Machining CO INC | Santa Clara | 20–99 | ● ACTIVE |
| RERincon Engineering Technologies | Carpinteria | — | ● ACTIVE |
Rkl Technologies, INC. | Corona | — | ● ACTIVE |
R. & L. Crown Equipment, INC. | S San Fran | 1–19 | ● ACTIVE |
R.m. Baker Machine & Tool, INC. | Covina | — | ● ACTIVE |
R.m. Machining, INC. | San Carlos | — | ● ACTIVE |
Robert P. Martin Company | South El Monte | — | ● ACTIVE |
| RPRobert's Precision Engineering, INC. | Anaheim | — | ● ACTIVE |
Rogerson Aircraft Equipment Group | Irvine | — | ● ACTIVE |
Rose Manufacturing Group, INC | Oceanside | 20–99 | ● ACTIVE |
Roy E. Hanson Jr. Mfg. | Los Angeles | — | ● ACTIVE |
Rs Hughes CO INC | Vista | — | ● ACTIVE |
| RIRtec-instruments INC | San Jose | — | ● ACTIVE |
| RPR&v Polishing LLC | Gardena | — | ● ACTIVE |
Rvp Precision Metal Fabricators, INC. | Newhall | 1–19 | ● ACTIVE |
| SSSafe-t-rack Systems, INC. | Rocklin | 1–19 | ● ACTIVE |
Safeway Sign Company | Adelanto | — | ● ACTIVE |
Salsa Prototype Specialties, LLC | Ventura | 1–19 | ● ACTIVE |
San Diego Steel Solutions | Escondido | — | ● ACTIVE |
Sanford Metal Processing CO | Menlo Park | — | ● ACTIVE |
| SCSanta Clara Plating Co., INC. | Santa Clara | 100–499 | ● ACTIVE |
Saturn Fasteners INC | Burbank | — | ● ACTIVE |
Sbiw, INC. | San Ramon | 1–19 | ● ACTIVE |
Scandic Springs, INC. | San Leandro | 20–99 | ● ACTIVE |
Schmidt Industries, INC. | Sun Valley | — | ● ACTIVE |
Schulte Corporation | San Clemente | 1–19 | ● ACTIVE |
Sedrak Mangikyan | Sun Valley | 1–19 | ● ACTIVE |
| SISerrano Industries, INC. | Santa Fe Springs | — | ● ACTIVE |
| SMSheet Metal Engineering | Simi Valley | — | ● ACTIVE |
Sheffield Platers, INC. | San Diego | — | ● ACTIVE |
Shields, Harper & CO. | Martinez | — | ● ACTIVE |