| RPR P M Centerless Grinding CO | Norco | — | ◇ UNVERIFIED |
| RWRt Welding | Hesperia | — | ◇ UNVERIFIED |
| RARucker and Kolls INC | Milpitas | — | ◇ UNVERIFIED |
| RSRush Steel Supply Incorporated | El Centro | — | ◇ UNVERIFIED |
| STSanarus Technologies INC | Pleasanton | — | ◇ UNVERIFIED |
| SDSan Diego Refining CO | Escondido | — | ◇ UNVERIFIED |
| SJSan Jose Die Casting CORP | San Jose | — | ◇ UNVERIFIED |
| SCSanta Clara Windustrial | Fremont | — | ◇ UNVERIFIED |
| SRSanta Rosa Lead Products LLC | Ontario | — | ◇ UNVERIFIED |
| SESapa Extruder, INC | City of Industry | — | ◇ UNVERIFIED |
| SESaratoga Energy Research Partners | Berkeley | — | ◇ UNVERIFIED |
 Schlosser Forge Company Rancho Plant #2 | Fontana | — | ◇ UNVERIFIED |
| SSScott Schmitt | Rocklin | — | ◇ UNVERIFIED |
| SISearing Ind | Rancho Cucamonga | — | ◇ UNVERIFIED |
| SPSeaward Products INC | Chatsworth | — | ◇ UNVERIFIED |
| SBSequoia Brick | Lindsay | — | ◇ UNVERIFIED |
| SESharon Escoto | Hesperia | — | ◇ UNVERIFIED |
| SPShawcor Pipe Protection LLC. | Fontana | — | ◇ UNVERIFIED |
| SHS & H Welding INC Dba S & H Metals | Sacramento | — | ◇ UNVERIFIED |
| SASierra Alloys Company | Azusa | — | ◇ UNVERIFIED |
| SASierra Aluminum Architectural | Fontana | — | ◇ UNVERIFIED |
| SASierra Aluminum Company | Fontana | — | ◇ UNVERIFIED |
| SASierra Aluminum, Div of Samuel, Son & CO | Riverside | — | ◇ UNVERIFIED |
| SASierra Aluninum Fontana Extrusion Operation | Fontana | — | ◇ UNVERIFIED |
| SDSierra Design & Manufacturing | Modesto | — | ◇ UNVERIFIED |
| SMSimonz Machine Dba Hyve Technologies | San Diego | — | ◇ UNVERIFIED |
| SPSiva Power INC | Santa Clara | — | ◇ UNVERIFIED |
| SRSkees Recycling | Fresno | — | ◇ UNVERIFIED |
| SMSmart Machining, LLC | Santa Clara | — | ◇ UNVERIFIED |
| SWSmart Wires INC | Union City | — | ◇ UNVERIFIED |
| SSSmt Sales INC Dba Tom's Mobil Welding | Santa Paula | — | ◇ UNVERIFIED |
| SMSnl-iov Montclair Owner LLC | Montclair | — | ◇ UNVERIFIED |
 So-cal Value Added LLC | Camarillo | — | ◇ UNVERIFIED |
| SISolcoa Industries | Alameda | — | ◇ UNVERIFIED |
| SESolo Enterprise CORP | City of Industry | — | ◇ UNVERIFIED |
| SBSouth Bay Foundry INC | Santee | — | ◇ UNVERIFIED |
| SMSpace Machining INC | San Jose | — | ◇ UNVERIFIED |
| SISparkz INC | Sacramento | — | ◇ UNVERIFIED |
| SWSpingolo Warehouse Company | Stockton | — | ◇ UNVERIFIED |
| SSSposato Staffing LLC | Los Angeles | — | ◇ UNVERIFIED |
 Stang Industries INC | Corona | — | ◇ UNVERIFIED |
| SMStar Metals, Inc. | Jurupa Valley | — | ◇ UNVERIFIED |
| SUSteelco U.S.A; Great Pacific Elbow Company; Deluxe Building Products | Chino | — | ◇ UNVERIFIED |
| SFSteel Flow Corporation | San Bernardino | — | ◇ UNVERIFIED |
| SGStone Gryphon Tactical LLC | Chula Vista | — | ◇ UNVERIFIED |
| SIStrand Industries | Riverside | — | ◇ UNVERIFIED |
| SMStrategic Materials Corporation | South Gate | — | ◇ UNVERIFIED |
| STStreuter Technologies INC | San Clemente | — | ◇ UNVERIFIED |
| SISummit Iron Works Group INC | Gardena | — | ◇ UNVERIFIED |
| SOSunrise of Carmichael | Carmichael | — | ◇ UNVERIFIED |
