| 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 |
| 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 Manufacturing332322 | — | ◇ 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 |
| SASpruce Avenue Associate Ii, LLC | Riverside | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| SSStar Side Design | Riverside | CA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| STStellar Trailers CORP | Riverside | CA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| SIStrand Industries | Riverside | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| SSStretch Solutions LLC | Riverside | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| SLStylex LLC Dba Stylex Windows and Doors | Riverside | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
 Sunset Vans, Inc. | Riverside | CA | Transportation Equipment Manufacturing336310 | — | ◇ UNVERIFIED |
| Sunset Vans, Inc. | Riverside | CA | Transportation Equipment Manufacturing336310 | — | ◇ UNVERIFIED |
| SHSwisher Hygiene | Riverside | CA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| SCSycamore Canyon Apartments | Riverside | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| TTeam | Riverside | CA | Furniture and Related Product Manufacturing337125 | — | ◇ UNVERIFIED |
| TBThe Bernard and Sharon D'Alesio Family Trust | Riverside | CA | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
| TCThe Church in Riverside | Riverside | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| TNThe New Ambition | Riverside | CA | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| TATmi Automotive Products INC | Riverside | CA | Miscellaneous Manufacturing339113 | — | ◇ UNVERIFIED |
| TAToku American INC Dba Striker Hydraulic Breakers | Riverside | CA | Transportation Equipment Manufacturing336510 | — | ◇ UNVERIFIED |
| TLTop-Dent Lab | Riverside | CA | Miscellaneous Manufacturing339116 | — | ◇ UNVERIFIED |
| TPToro Place INC. | Riverside | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| TLTortillacraft LLC | Riverside | CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| TPTrademark Plastics INC | Riverside | CA | Miscellaneous Manufacturing339113 | — | ◇ UNVERIFIED |
| TRTransdev Rail INC | Riverside | CA | Transportation Equipment Manufacturing336510 | — | ◇ UNVERIFIED |
| TITrucknology INC. | Riverside | CA | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| TLTrue Level Investments INC Dba Nuthera | Riverside | MO | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| TRTxi Riverside INC | Riverside | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| UFUniversal Forest Products, INC. | Riverside | CA | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| VPValley Printers INC | Riverside | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| VMVenetto Management Group LLC | Riverside | CA | Transportation Equipment Manufacturing336340 | — | ◇ UNVERIFIED |
| VFViking Fabrication Service INC | Riverside | CA | Fabricated Metal Product Manufacturing332996 | — | ◇ UNVERIFIED |
| VPVilla Park Orchards | Riverside | CA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| VPVirginia Park Foods | Riverside | CA | Food Manufacturing311824 | — | ◇ UNVERIFIED |
| WEWalker Evans Enterprises, a California Corporation | Riverside | CA | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| WIWaterman Industries | Riverside | CA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| WIWebcam INC | Riverside | CA | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
