| 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 |
| NANorth American Textile Company | Glendale | CA | Apparel Manufacturing315990 | 20-99 | ◐ 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 |
| PIPerich INC | San Diego | CA | Transportation Equipment Manufacturing336611 | 1-19 | ◐ LIKELY ACTIVE |
| PIPictorvision INC. | Reseda | CA | Transportation Equipment Manufacturing336413 | 1-19 | ◐ LIKELY ACTIVE |
| RSRelativity Space INC. | Long Beach | CA | Transportation Equipment Manufacturing336414 | 20-99 | ◐ LIKELY ACTIVE |
| RSRelativity Space, INC | Long Beach | CA | Transportation Equipment Manufacturing336414 | 500+ | ◐ LIKELY ACTIVE |
| RMRs Machining CO. INC. | Chatsworth | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SDSan Diego | San Diego | CA | Food Manufacturing311412 | 1-19 | ◐ LIKELY ACTIVE |
Scaled Composites, LLC | Mojave | CA | Transportation Equipment Manufacturing336411 | 100-499 | ◐ LIKELY ACTIVE |
Scelzi Enterprises INC | Fresno | CA | Transportation Equipment Manufacturing336211 | — | ◐ LIKELY ACTIVE |
| SCScfm Corporation | Anaheim | CA | Machinery Manufacturing333413 | — | ◐ LIKELY ACTIVE |
| SPSea-tech Products, INC. | Valley Center | CA | Transportation Equipment Manufacturing336611 | 1-19 | ◐ 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 |
| SPSouth Precision Machining | Ontario | CA | Transportation Equipment Manufacturing336413 | 1-19 | ◐ LIKELY ACTIVE |
| SMSpenco Machine & Manufacturing INC. | Temecula | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ 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 |
| TMTdk Magnetic Tape | Irvine | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| TTesla | Fremont | CA | Transportation Equipment Manufacturing336110 | 500+ | ◐ LIKELY ACTIVE |
| TITesla INC. | Lathrop | CA | Transportation Equipment Manufacturing336211 | — | ◐ LIKELY ACTIVE |
| TAThales Avionics INC CA | Irvine | CA | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| TGThe Gill Corporation | El Monte | CA | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ 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 |
Votaw Precision Technologies INC | Santa Fe Springs | CA | Machinery Manufacturing333514 | 100-499 | ◐ 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 |
| WCWildwood Curtain Sides Inc | Kingsburg | CA | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| WAWisk Aero LLC | Mountain View | CA | Transportation Equipment Manufacturing336411 | 500+ | ◐ LIKELY ACTIVE |
| WAWisk Aero LLC - Fremont | Fremont | CA | Transportation Equipment Manufacturing336411 | 20-99 | ◐ LIKELY ACTIVE |
| WEWkf (friedman) Enterprises, INC. | Clayton | CA | Transportation Equipment Manufacturing336413 | 1-19 | ◐ LIKELY ACTIVE |
| WHWoodward Hrt INC | Valencia | CA | Machinery Manufacturing333995 | — | ◐ LIKELY ACTIVE |
| WHWoodward HRT Santa Clarita | Valencia | CA | Electrical Equipment, Appliance & Component Manufacturing335314 | 500+ | ◐ LIKELY ACTIVE |
| YMYsl Machining LLC | Fremont | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| ZAZenix Aerospace US INC. | San Diego | CA | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |