| NINicca Investments, Inc. | Ontario | — | ◇ UNVERIFIED |
| NENicco Engineering INC | Rancho Cucamonga | — | ◇ UNVERIFIED |
| NRNordam Repair, Victorville | Victorville | — | ◇ UNVERIFIED |
| NPNorthern Pacific Airways, INC. | Ontario | — | ◇ UNVERIFIED |
| NRNucor Rebar Fabrication Fontana | Fontana | — | ◇ UNVERIFIED |
| OBOerlikon Balzers Coating USA INC | Rancho Cucamonga | — | ◇ UNVERIFIED |
| OCOrange County Erectors, INC. | Ontario | — | ◇ UNVERIFIED |
| OCOrco Construction Supply | Bloomington | — | ◇ UNVERIFIED |
| PDPacific Duct INC | Montclair | — | ◇ UNVERIFIED |
| PEPacific Embedment Products | Adelanto | — | ◇ UNVERIFIED |
| PFPacific Fabrication INC | Rancho Cucamonga | — | ◇ UNVERIFIED |
| PRPacific Rebar INC | Ontario | — | ◇ UNVERIFIED |
| PSPacific Safe Manufacturing, Inc. | Upland | — | ◇ UNVERIFIED |
| PSPacific Steel Group | Bloomington | — | ◇ UNVERIFIED |
| PSPacific Steel Group | Bloomington | — | ◇ UNVERIFIED |
| PSPainting & Stripping & Coatings, INC. | Chino | — | ◇ UNVERIFIED |
| PMPamco Machine Works INC | Rancho Cucamonga | — | ◇ UNVERIFIED |
| PSParcell Steel CORP | Fontana | — | ◇ UNVERIFIED |
| PMPd Mechanical INC | Rialto | — | ◇ UNVERIFIED |
| PPPerformance Powder Coating | Apple Valley | — | ◇ UNVERIFIED |
| PAPhoenix Arms | Ontario | — | ◇ UNVERIFIED |
| PHPrecision Hermetic Technology, INC. | Redlands | — | ◇ UNVERIFIED |
| PEPremier Enclosure System INC | Ontario | — | ◇ UNVERIFIED |
| PRPremiere Rack Solutions, INC. | Ontario | — | ◇ UNVERIFIED |
| PMPrimos Machine Shop LLC | Ontario | — | ◇ UNVERIFIED |
| QCQuality Control Plating | Ontario | — | ◇ UNVERIFIED |
| QRQuality Roll-up Door & Fence,pu Gwon Dba | San Bernardino | — | ◇ UNVERIFIED |
| QSQuanex Screens/quanex Building Products | Fontana | — | ◇ UNVERIFIED |
| RFRam Fiberglass INC | Chino | — | ◇ UNVERIFIED |
| RMRancho Magnum Range | Rancho Cucamonga | — | ◇ UNVERIFIED |
| RMRancho Metal Polishing INC | Rancho Cucamonga | — | ◇ UNVERIFIED |
| RBR & B Reinforcing Steel CORP. | Chino | — | ◇ UNVERIFIED |
| RBR & B Tool Supply, Inc. | Apple Valley | — | ◇ UNVERIFIED |
| RSRegional Steel CORP | Fontana | — | ◇ UNVERIFIED |
| RPReid Products INC | Apple Valley | — | ◇ UNVERIFIED |
| RIRepublic Iron Works | San Bernardino | — | ◇ UNVERIFIED |
| RMRexco Met Dba Rexco | Ontario | — | ◇ UNVERIFIED |
| RWRFC Wire Forms, Inc., a California corporation | Ontario | — | ◇ UNVERIFIED |
| RMRickard Metals, Inc. | Ontario | — | ◇ UNVERIFIED |
| RIR & I Industries | Ontario | — | ◇ UNVERIFIED |
| RIRj Industries | Ontario | — | ◇ UNVERIFIED |
| RJR & J Welding & Metal Fabrication | Ontario | — | ◇ UNVERIFIED |
| RFRms Finishing, INC. | Chino | — | ◇ UNVERIFIED |
| RCRnd Contractors INC | Fontana | — | ◇ UNVERIFIED |
| RERomero's Engineering INC | Rancho Cucamonga | — | ◇ UNVERIFIED |
| RIRsi Installation INC | Rialto | — | ◇ UNVERIFIED |
| RFRush Forklift Service | Upland | — | ◇ UNVERIFIED |
| SLSchlage Lock Company LLC | Chino | — | ◇ UNVERIFIED |
 Schlosser Forge CO | Rancho Cucamonga | — | ◇ UNVERIFIED |
| Schlosser Forge Company Rancho Plant #2 | Fontana | — | ◇ UNVERIFIED |
