| MSMeggitt Safety Systems INC | Simi Valley | CA | Fabricated Metal Product Manufacturing332912 | — | ▲ REPORTED CLOSED |
| MTMorgan Truck Body LLC MCA | Riverside | CA | Transportation Equipment Manufacturing336211 | 100-499 | ◐ LIKELY ACTIVE |
| NANasco Aircraft Brake, INC. | Gardena | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| NBNaval Base San Diego | San Diego | CA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| NGNorthrop Grumman Systems CORP | Palmdale | CA | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| NGNorthrop Grumman Systems Corporation | Azusa | CA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
Northrop Grumman Systems Corporation | Redondo Beach | CA | Computer and Electronic Product Manufacturing334220 | — | ▲ REPORTED CLOSED |
| PTPacific Truck Equipment | Whittier | CA | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| PPPaco Plastics & Engineering, INC. | Santa Fe Springs | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| PSParagon Swiss | Santa Clara | CA | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| PCParker-hannifin Corporation | Irvine | CA | Fabricated Metal Product Manufacturing332912 | — | ◐ LIKELY ACTIVE |
| PCParker-hannifin Corporation | Irvine | CA | Fabricated Metal Product Manufacturing332912 | — | ◐ LIKELY ACTIVE |
| RSRelativity Space INC. | Long Beach | CA | Transportation Equipment Manufacturing336414 | 500+ | ◐ LIKELY ACTIVE |
| RKRogerson Kratos | Pasadena | CA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| RIRohr, INC. | Riverside | CA | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| RMRs Machining CO. INC. | Chatsworth | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SCSafran Cabin INC | Costa Mesa | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| SDSan Diego | San Diego | CA | Food Manufacturing311412 | 1-19 | ◐ LIKELY ACTIVE |
| SJSan Jose Die Casting & Machining CORP. | Lincoln | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
Scelzi Enterprises INC | Fresno | CA | Transportation Equipment Manufacturing336211 | — | ◐ LIKELY ACTIVE |
| SCScfm Corporation | Anaheim | CA | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| STSensata Technologies Inc | Thousand Oaks | CA | Computer and Electronic Product Manufacturing334412 | 100-499 | ◐ LIKELY ACTIVE |
| SMS&h Melkes | South El Monte | CA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| SASimwon America CORP | Lathrop | CA | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| SISonic Industries, INC. | Torrance | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SPSonoma Photonics, INC | Santa Rosa | CA | Machinery Manufacturing333310 | — | ▲ REPORTED CLOSED |
| SBSpecialized Bicycle Components | Morgan Hill | CA | Transportation Equipment Manufacturing336991 | 100-499 | ◐ LIKELY ACTIVE |
| SMSpenco Machine & Manufacturing INC. | Temecula | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SLStratolaunch, LLC | Mojave | CA | Transportation Equipment Manufacturing336411 | 100-499 | ◐ LIKELY ACTIVE |
| SMSubtractive Manufacturing LLC | Hollister | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SNSymbio North America Corporation | Temecula | CA | Transportation Equipment Manufacturing336320 | 1-19 | ◐ LIKELY ACTIVE |
| TATa Aerospace CO | Valencia | CA | Fabricated Metal Product Manufacturing332510 | — | ▲ REPORTED CLOSED |
| TITabc, INC | Long Beach | CA | Electrical Equipment, Appliance & Component Manufacturing335312 | 100-499 | ◐ LIKELY ACTIVE |
| TMTdk Magnetic Tape | Irvine | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| TITesla INC. | Lathrop | CA | Transportation Equipment Manufacturing336211 | — | ◐ LIKELY ACTIVE |
| TMTesla Motors, INC | Palo Alto | CA | Transportation Equipment Manufacturing336111 | — | ◐ LIKELY ACTIVE |
| TSTetrad Services, INC. | Red Bluff | CA | Machinery Manufacturing333611 | — | ◐ LIKELY ACTIVE |
| TAThales Avionics INC CA | Irvine | CA | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| TTTpd Trailers, INC. | Sacramento | CA | Transportation Equipment Manufacturing336212 | — | ◐ LIKELY ACTIVE |
| TMTuffer Manufacturing CO Incorporated | Anaheim | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| UPUnlimited Performance Products | Hesperia | CA | Transportation Equipment Manufacturing336211 | — | ◐ LIKELY ACTIVE |
| VIVast, INC. (mojave) | Mojave | CA | Transportation Equipment Manufacturing336414 | 20-99 | ◐ LIKELY ACTIVE |
| VCVersaform CORP. | Vista | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| VGVi-star Gear CO INC | Paramount | CA | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| VMVtn Manufacturing, INC | San Jose | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| WPWabtec Passenger Transit | San Fernando | CA | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| WCWest Coast Surgical | Half Moon Bay | CA | Transportation Equipment Manufacturing336390 | — | ◐ LIKELY ACTIVE |
| WMWillard Marine, INC. | Oceanside | CA | Transportation Equipment Manufacturing336612 | — | ◐ LIKELY ACTIVE |
| WAWisk Aero LLC - Fremont | Fremont | CA | Transportation Equipment Manufacturing336411 | 20-99 | ◐ LIKELY ACTIVE |
| WHWoodward Hrt INC | Valencia | CA | Machinery Manufacturing333995 | — | ◐ LIKELY ACTIVE |