| SCSchoenstein & CO | Benicia, CA | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| SLScott Lamp CO INC | Fairfield, CA | Electrical Equipment, Appliance & Component Manufacturing335121 | — | ◇ UNVERIFIED |
| SCSequoia Cabinets | Fairfield, CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| SISg Investment America, INC | Vacaville, CA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| SCShaker Cabinet Co | Benicia, CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| SWShiloh Wind Power Plant | Suisun City, CA | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◇ UNVERIFIED |
| SPSierra Performance Mfg | Dixon, CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SHSigmatex High Technology | Benicia, CA | Electrical Equipment, Appliance & Component Manufacturing335991 | — | ◇ UNVERIFIED |
| SBSimonton Building Products INC Aka Simonton Window | Vacaville, CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| SCSo Cal Ship Services | Benicia, CA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| SSolano | Birds Landing, CA | Machinery Manufacturing333611 | — | ◇ UNVERIFIED |
| SCSolano Concrete Company INC | Fairfield, CA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SCSolano County - Fleet Management | Vacaville, CA | Machinery Manufacturing333512 | — | ◇ UNVERIFIED |
| SCSolano County Water Agency | Winters, CA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| SISolano Irrigation District | Vacaville, CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
 Sonoco Products Company | Benicia, CA | Paper Manufacturing322214 | — | ◇ UNVERIFIED |
| SOSparflex of California INC Dba Rivercap USA INC | Benicia, CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SDSquare D Laser Response Center | Fairfield, CA | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| SCState Compensation Insurance Fund | Vacaville, CA | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| SOState of Ca Dept. of Water Resources Delta Field Division Travis Tank | Fairfield, CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| STS T Johnson Company LLC | Fairfield, CA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| SMSuba Mfg, INC | Benicia, CA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| SRSunpol Resins & Polymers INC | Fairfield, CA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| SSSuperior Sign Systems | Vacaville, CA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| SISuperstore Industries Dba Sunnyside Farms | Fairfield, CA | Food Manufacturing311511 | — | ◇ UNVERIFIED |
| SSSuper Store Industries/fairfield Dairy Division | Fairfield, CA | Food Manufacturing311511 | — | ◇ UNVERIFIED |
| SASwan Associates in Corporated | Benicia, CA | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| SCSyar Concrete LLC | Fairfield, CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSyar Concrete LLC | Vallejo, CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SISyar Industries | Fairfield, CA | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| SISyar Industries, INC. | Dixon, CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SFSynder Filtration | Vacaville, CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| SISynder INC Dba Synder Filtration | Vacaville, CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| TTemco | Benicia, CA | Machinery Manufacturing333993 | — | ◇ UNVERIFIED |
| TATencate Advanced Composites, I | Benicia, CA | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| TFTerry Ferrell/agent for Service | Vallejo, CA | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
| TCThe Colt Group | Benicia, CA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| TOThe Olive Oil Factory, LLC | Fairfield, CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| TTherma-flite | Benicia, CA | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| TTThe Tremont Group, INC. Tsi Division | Dixon, CA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| TMT Met-north American Operations-vallejo | Vallejo, CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| THTom Hopkins, an Individual | Vallejo, CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| TOTonnellerie O / Cork Supply | Benicia, CA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| TBTop Brass Investments, LLC | Vallejo, CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| TOTotally Organized | Suisun City, CA | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| TRToys R US - 6549 | Fairfield, CA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| TSTransportation Services, INC. | Vacaville, CA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| TTTronex Technology INC | Fairfield, CA | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| TDTubelite Denco LLC | Benicia, CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| UMUnico Mechanical Corporation | Benicia, CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
