 Matthews International CORP | San Jacinto | — | ◇ UNVERIFIED |
| MHMeggitt (north Hollywood), INC | Corona | — | ◇ UNVERIFIED |
| MGMesa General Engineering INC | Corona | — | ◇ UNVERIFIED |
| MLMetro Line Industries INC R | Corona | — | ◇ UNVERIFIED |
| MMModular Metal Fabricators INC | Moreno Valley | — | ◇ UNVERIFIED |
| MIMtw3d, INC | Desert Hot Springs | — | ◇ UNVERIFIED |
| NLNext Level Construction Services | Temecula | — | ◇ UNVERIFIED |
| NCNordgear CORP. | Corona | — | ◇ UNVERIFIED |
| NHNormont Hydraulic Sales & Service INC | Temecula | — | ◇ UNVERIFIED |
| OEOtis Elevator Company | Riverside | — | ◇ UNVERIFIED |
| PCPacific Clay Products INC | Lake Elsinore | — | ◇ UNVERIFIED |
| PDPacific Distributing, INC. - Hemet | Hemet | — | ◇ UNVERIFIED |
| PKPacific Kiln & Insulations CO INC | Moreno Valley | — | ◇ UNVERIFIED |
| PUParex USA INC. | Riverside | — | ◇ UNVERIFIED |
| PHParker Hannifin Corp, Cylinder Div | Corona | — | ◇ UNVERIFIED |
| PPPark Place Owners Association | Temecula | — | ◇ UNVERIFIED |
| PVPecos Ventures Industries INC | Corona | — | ◇ UNVERIFIED |
| PIPinpoint, INC | Riverside | — | ◇ UNVERIFIED |
| PIPlaza Investment Company, INC. | Palm Springs | — | ◇ UNVERIFIED |
 Precise Aerospace Manufacturing | Corona | — | ◇ UNVERIFIED |
| PSPrecise Services West | Corona | — | ◇ UNVERIFIED |
| PFPremier Framing, INC | Corona | — | ◇ UNVERIFIED |
| PRPrime Refrigeration Systems | Riverside | — | ◇ UNVERIFIED |
| PRPrimoris Renewable Energy | Desert Center | — | ◇ UNVERIFIED |
| PCPro Coat Powder Coating | Lake Elsinore | — | ◇ UNVERIFIED |
| QPQuiroz Precision Machining | Riverside | — | ◇ UNVERIFIED |
| RCRainbow Custom Cars, INC. | Corona | — | ◇ UNVERIFIED |
| RLRalph Lauren | Cabazon | — | ◇ UNVERIFIED |
| RCRancho California Water District | Temecula | — | ◇ UNVERIFIED |
| RMRavinder M. Joshi and Vaishali M. Joshi, Trustees of the M Joshi Revocable Living Trust dated May 10, 2020 | Jurupa Valley | — | ◇ UNVERIFIED |
| RIR-cold, INC. | Perris | — | ◇ UNVERIFIED |
| RIResidence Inn La Quinta | La Quinta | — | ◇ UNVERIFIED |
| RMRestoration Management Company | Lake Elsinore | — | ◇ UNVERIFIED |
| RFRiser Forklift LLC | Hemet | — | ◇ UNVERIFIED |
| RFRiser Forklift LLC | Hemet | — | ◇ UNVERIFIED |
| RCRiver City Services LLC | Riverside | — | ◇ UNVERIFIED |
| RCRiver City Services LLC | Riverside | — | ◇ UNVERIFIED |
| RCRiverside County Fire Dept | Moreno Valley | — | ◇ UNVERIFIED |
| RPRiverside Public Utilities | Riverside | — | ◇ UNVERIFIED |
| RJR & J Material Handling INC | Corona | — | ◇ UNVERIFIED |
| RRRolling Ridge Cleaners Jld Dry Cleaners | Moreno Valley | — | ◇ UNVERIFIED |
| RPR P M Centerless Grinding CO | Norco | — | ◇ UNVERIFIED |
| RGRubicon Gear INC | Corona | — | ◇ UNVERIFIED |
| RCRuskin CO | Jurupa Valley | — | ◇ UNVERIFIED |
| S1Sage 111, LLC | Palm Desert | — | ◇ UNVERIFIED |
| SMSheet Metal Specialists | Riverside | — | ◇ UNVERIFIED |
| SESpaulding Equipment CO | Perris | — | ◇ UNVERIFIED |
 Star Milling CO | Perris | — | ◇ UNVERIFIED |
| SFSunmist Fruit | Temecula | — | ◇ UNVERIFIED |
| TATrilogy at Glen Ivy | Corona | — | ◇ UNVERIFIED |
