| OWOld World Classics INC and Provenza Floors INC | Santa Ana | CA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| OCOlive Crest | Santa Ana | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| OCOlympic Coatings | Santa Ana | CA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| ODOmar Deen | Santa Ana | CA | Transportation Equipment Manufacturing336111 | — | ◇ UNVERIFIED |
| OEOmega Emgineering INC Dba Newport Electronics INC | Santa Ana | CA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| OIOmniprint, Inc. | Santa Ana | CA | Computer and Electronic Product Manufacturing334118 | — | ◇ UNVERIFIED |
| OWOne Way Mfg | Santa Ana | CA | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| OCOrange Co, Pfrd/facilities Operations | Santa Ana | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| OOOrchid Orthopedics | Santa Ana | CA | Miscellaneous Manufacturing339113 | — | ◇ UNVERIFIED |
| OUOrw USA INC Dba 4 Wheel Parts | Santa Ana | CA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| OROscorp Restorations INC | Santa Ana | CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| PFPacific Fresh Foods | Santa Ana | CA | Food Manufacturing311991 | — | ◇ UNVERIFIED |
| PSPacific Screenprint International INC | Santa Ana | CA | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
 Panelight Components Group, LLC | Santa Ana | CA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| PCParamount Custom Plating | Santa Ana | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| PCParty City CORP Dba Halloween City Store #8037 | Santa Ana | CA | Miscellaneous Manufacturing339993 | — | ◇ UNVERIFIED |
| PCPaul's Custom Shutters, Paul T | Santa Ana | CA | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| PLPennyvision LLC Dba Pizza Hut | Santa Ana | CA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| PRPeople's Refinery-hero Oak LLC | Santa Ana | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| PAPerez Auto Repair | Santa Ana | CA | Transportation Equipment Manufacturing336992 | — | ◇ UNVERIFIED |
| PSPerformance Sport International, INC. | Santa Ana | CA | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| PLPinnacle Landscape Management INC | Santa Ana | CA | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| PCPleion CORP | Santa Ana | CA | Furniture and Related Product Manufacturing337214 | — | ◇ UNVERIFIED |
| PBPM Biomedical Inc. | Santa Ana | CA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| PLPolyclad Laminates INC | Santa Ana | CA | Plastics and Rubber Products Manufacturing326130 | — | ◇ UNVERIFIED |
| PLPolyclad Laminates INC | Santa Ana | CA | Plastics and Rubber Products Manufacturing326130 | — | ◇ UNVERIFIED |
| PMPrecious Metals Plating CO | Santa Ana | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| PPPrecision Powder Coating, Inc | Santa Ana | CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| PFPrime Forming & Construction Supplies INC Dba Fitzgerald Formliners in | Santa Ana | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| PPPrint Plus Manufacturing INC | Santa Ana | CA | Textile Mills313320 | — | ◇ UNVERIFIED |
| PTPrint Techniques | Santa Ana | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| PSPromotional Signs | Santa Ana | CA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| PGProrack Gas Products | Santa Ana | CA | Fabricated Metal Product Manufacturing332919 | — | ◇ UNVERIFIED |
| PLPrudental Labroatories Inc | Santa Ana | CA | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| QIQ-flex INC | Santa Ana | CA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| QTQuick Turn Machine | Santa Ana | CA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| RIRa Industries INC | Santa Ana | CA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| RBRatan Baid | Santa Ana | CA | Transportation Equipment Manufacturing336320 | — | ◇ UNVERIFIED |
| RRRay Roberts Realty | Santa Ana | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| RBR & B Wire Prod. INC | Santa Ana | CA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| RGRed Graphics | Santa Ana | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| RBRemy Biosciences INC | Santa Ana | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| RIRickenbacker International CORP | Santa Ana | CA | Miscellaneous Manufacturing339992 | — | ◇ UNVERIFIED |
| RERicoh Electronics INC | Santa Ana | CA | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| RPRmc Printing INC Dba Sandstone Silkscreening | Santa Ana | CA | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | Santa Ana | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RPRobinson Pharma, INC. | Santa Ana | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| RPRobinson Pharma INC. - Harbor 2 | Santa Ana | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| RDRoi Development CORP | Santa Ana | CA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| RARoland & Associates | Santa Ana | CA | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
