| OTOwen Trailers INC | Riverside | CA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| PSPacific Structures | Riverside | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PPPact Pharma INC | Riverside | CA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| PIParadigm Ironworks | Riverside | CA | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| PCParty City CORP Dba Halloween City Store #8027 | Riverside | CA | Miscellaneous Manufacturing339993 | — | ◇ UNVERIFIED |
| PAPhoenix Alloy Solutions, LLC | Riverside | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| PIPierco INC. | Riverside | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| PIPinpoint, INC | Riverside | CA | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| PIPolaris Industries Dba Pro Armor | Riverside | CA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| PIPolaris Industries INC Dba Walker Evans Enterprises | Riverside | CA | Transportation Equipment Manufacturing336330 | — | ◇ UNVERIFIED |
| PIPolaris Industries INC Dba Walker Evans Enterprises | Riverside | CA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| PTPost Tension Solutions West LLC | Riverside | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| PIPre-cal INC Dba Ginger Precast Designs | Riverside | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PWPremium Waters INC | Riverside | MO | Beverage and Tobacco Product Manufacturing312112 | — | ◇ UNVERIFIED |
| PEPress Enterprise Fleet the | Riverside | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| PRPrime Refrigeration Systems | Riverside | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| PMPro Mold INC | Riverside | CA | Electrical Equipment, Appliance & Component Manufacturing335121 | — | ◇ UNVERIFIED |
| PLProtobox Limited Liability Company | Riverside | OH | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| QCQuail Creek Apartments | Riverside | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| QSQuality Shutters INC | Riverside | CA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| QPQuiroz Precision Machining | Riverside | CA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| RIRcs Industries INC | Riverside | CA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| RSRed Star Logistics, Inc. | Riverside | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| REReisner Enterprises INC. Dba Westcorp Engineering | Riverside | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| RCRequena CORP Dba Al's Machine & Auto Repair | Riverside | CA | Transportation Equipment Manufacturing336311 | — | ◇ UNVERIFIED |
| RCRichartz, Christopher | Riverside | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| RCRiver City Services LLC | Riverside | CA | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| RCRiver City Services LLC | Riverside | CA | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| RCRiverside Cement CO | Riverside | CA | Nonmetallic Mineral Product Manufacturing327124 | — | ◇ UNVERIFIED |
| RPRiverside Public Utilities | Riverside | CA | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| RMRobert M. Lane | Riverside | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| RRRobertsons Ready Mix | Riverside | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RMRolenn Manufacturing INC | Riverside | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| RIRoyal Interpack of North America INC | Riverside | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| RERSF Enterprises, Inc. | Riverside | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| SCSabert CORP | Riverside | CA | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
| SAS and S Trailers LLC | Riverside | CA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| SASanta Ana Watershed Assocation | Riverside | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| SFSanta Fe Industries LLC | Riverside | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SESantillan Enterprises, LLC | Riverside | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SUSciacca's Upholstering & Design Center | Riverside | NJ | Furniture and Related Product Manufacturing337121 | — | ◇ UNVERIFIED |
| SMSeamless Manufacturing | Riverside | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| SHSeollo Holdings LLC | Riverside | CA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| SMSheet Metal Specialists | Riverside | CA | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| SASierra Aluminum, Div of Samuel, Son & CO | Riverside | CA | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| SSSigma Stretch Film Div of Sigma Plastics Group | Riverside | CA | Plastics and Rubber Products Manufacturing326112 | — | ◇ UNVERIFIED |
| SRSignal Restoration Services | Riverside | CA | Textile Mills313310 | — | ◇ UNVERIFIED |
| SSSimpson Strong Tie | Riverside | CA | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| SASphere Alliance INC Dba Advanced Aircraft Seal | Riverside | CA | Plastics and Rubber Products Manufacturing326291 | — | ◇ UNVERIFIED |
| SASpruce Avenue Associate Ii, LLC | Riverside | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
