| PTPhanes Therapeutics | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PVPhilips Volcano Corporation | San Diego | CA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| POPhivida Organics INC. | San Diego | CA | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| P2Pixel 2 Editions INC | San Diego | CA | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| PDPlaza Del Sol | San Diego | CA | Machinery Manufacturing333996 | — | ◇ UNVERIFIED |
| PPlexium | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PIPlexium INC | San Diego | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| PIPonddom Incorporated | San Diego | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| PHPoseidon HPP, LLC | San Diego | CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| PFPotiker Family Senior Residence | San Diego | CA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| PSPower Systems Testing | San Diego | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| PDPraxair Distribution INC. | San Diego | CA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| PEPrecision Engine Control Corporation | San Diego | CA | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| PGPrecision Graphic Systems, INC. | San Diego | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| PAPrime Asset Management | San Diego | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
 Prime Time Coatings, INC. | San Diego | CA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| PBPrimrose Bio INC | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PMPrint Munki LLC | San Diego | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| PProcisedx | San Diego | CA | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| PIProdermiq INC | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PMPromenade Mall Development CORP C/o Meissner Cres | San Diego | CA | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| PPPronto Products Co. | San Diego | CA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| PPPronto Products Co. | San Diego | CA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| PCPropulsion Controls Engineering | San Diego | CA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| PAProtea Aero Drive, LLC | San Diego | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| PBProtector Brewery L.L.C. | San Diego | CA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| PGProteintech Genomics INC | San Diego | CA | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| PCProvecho Coffee CO. LLC | San Diego | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| PMPure Meal Prep LLC | San Diego | CA | Food Manufacturing311991 | — | ◇ UNVERIFIED |
| PLPurepeg LLC | San Diego | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| PPPure Project, LLC | San Diego | CA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| PPPyramid Precision Machine INC | San Diego | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| QBQualcom Building W | San Diego | CA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| QIQualcomm INC | San Diego | CA | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| QIQualcomm INC | San Diego | CA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| QIQualcomm Incorporated | San Diego | CA | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| QCQuality Cabinet & Fixture CO INC | San Diego | CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| QSQuality Systems INC | San Diego | CA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| QDQuantum Design INC | San Diego | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| QCQuidel Cardiovascular INC | San Diego | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| QCQuidel Corporation | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| RTRagan Technologies | San Diego | CA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| RTRagan Technologies INC | San Diego | CA | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| RSRainbow Stone USA INC. | San Diego | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| RPRam Photonics LLC | San Diego | CA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| RMRamseys Mobile Fleet Services LLC | San Diego | CA | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| RCRanch & Coast Label INC | San Diego | CA | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| RBRancho Bernardo Community Presbyterian Church | San Diego | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| RAR and M Processing LLC | San Diego | CA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| RIRasirc INC | San Diego | CA | Primary Metal Manufacturing331313 | — | ◇ UNVERIFIED |
