| HAHanson Aggregates Pacific Southwest INC | San Diego | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IIIllumina INC | San Diego | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| INIntegra Neuro Sciences | San Diego | CA | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| IDIntegrated Dna Technologies | San Diego | CA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| IWInterior Wood | San Diego | CA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| IBInterstate Brands CORP | San Diego | CA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| ITInvivoscribe Technologies | San Diego | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| IAIsp Alginates INC | San Diego | CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| KMKoch Membrane Systems | San Diego | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| KKKoehler Kraft | San Diego | CA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| LMLockheed Martin Astronautics | San Diego | CA | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| MFMartin Furniture | San Diego | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| NCNaval Coating INC | San Diego | CA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| NNNude Nicotine INC | San Diego | CA | Beverage and Tobacco Product Manufacturing312230 | — | ◇ UNVERIFIED |
| PPPerformance Plastics | San Diego | CA | Electrical Equipment, Appliance & Component Manufacturing335991 | — | ◇ UNVERIFIED |
| PCPresidio Cleaners | San Diego | CA | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| RSRossin Steel INC | San Diego | CA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| RWR W Little CO | San Diego | CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| STSorrento Therapeutics | San Diego | CA | Chemical Manufacturing325411 | — | ▲ REPORTED CLOSED |
| SCSouthern California Plating CO INC | San Diego | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SStmicroelectronics | San Diego | CA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| STSurface Technologies Corporation- Naval Base San Diego 32nd St | San Diego | CA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| SMSymcoat Metal Processing | San Diego | CA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| TCTakeda California INC | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| TATeledyne Api, a Business Unit of Teledyne Instruments INC | San Diego | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| TEToppan Electronics INC | San Diego | CA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| TBTrilink Biotechnologies | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| TBTrilink Biotechnologies, INC | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| UCUnisys CORP | San Diego | CA | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| WIWc Ipa LLC Dba Green Flash Brewing CO | San Diego | CA | Beverage and Tobacco Product Manufacturing312120 | — | ▲ REPORTED CLOSED |
| 006-212231022-5 | San Diego | CA | Computer and Electronic Product Manufacturing334510 | 500+ | ◐ LIKELY ACTIVE |
| 1T104658 - Tijuana River Barrier | San Diego | CA | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| 1D130-San Diego | San Diego | CA | Machinery Manufacturing333921 | 20-99 | ◐ LIKELY ACTIVE |
| 3S3D Systems - San Diego | San Diego | CA | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| 6S619 Spirits | San Diego | CA | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| 8S808 Solutions INC | San Diego | CA | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| ASAbacus Sea LLC | San Diego | CA | Transportation Equipment Manufacturing336992 | — | ◐ LIKELY ACTIVE |
| AAbamerica | San Diego | CA | Chemical Manufacturing325620 | — | ◐ LIKELY ACTIVE |
| AKAbel Kaase | San Diego | CA | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| AWAbnormal Wine Company | San Diego | CA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| ANAbraham N Teran | San Diego | CA | Printing and Related Support Activities323111 | — | ▲ REPORTED CLOSED |
| AMAdvanced Monitors Corporation | San Diego | CA | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| ASAerospace Supply, INC | San Diego | CA | Fabricated Metal Product Manufacturing332912 | — | ◐ LIKELY ACTIVE |
| AIA.G.A. Investments II Inc. | San Diego | CA | — | — | ◐ LIKELY ACTIVE |
| AIAkamai Instincts INC. | San Diego | CA | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| ACAmerican Council on Exercise | San Diego | CA | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| AAmicitia | San Diego | CA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| ADAnalog Devices Inc. - San Diego | San Diego | CA | Computer and Electronic Product Manufacturing334413 | 20-99 | ◐ LIKELY ACTIVE |
| AIAnixter INC. | San Diego | CA | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◐ LIKELY ACTIVE |
| AMA.p. Machine Technology, INC. | San Diego | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |