| SFS F Ase INC | San Francisco | CA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| SCSf Coffee Company | San Francisco | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| SPSf Premier Dental | San Francisco | CA | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| SFS F Silkscreen | San Francisco | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| SMSfsu Mashouf Wellness Center | San Francisco | CA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| SBSharontom Batteries INC Dba Batteries Plus | San Francisco | CA | Electrical Equipment, Appliance & Component Manufacturing335912 | — | ◇ UNVERIFIED |
| SGShaw Gillian S | San Francisco | CA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| SPSheeran Pipeline, Inc. | San Francisco | CA | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| SBShennon Biotechnologies | San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| SSShoe Sugiyama and Yoko Sugiyama | San Francisco | CA | Miscellaneous Manufacturing339116 | — | ◇ UNVERIFIED |
| SCSightglass Coffee Roasters LLC | San Francisco | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| SPSimple Pleasures Coffee Roasting CO | San Francisco | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| STSkip Transport INC | San Francisco | CA | Transportation Equipment Manufacturing336999 | — | ◇ UNVERIFIED |
Skyline Steel INC. | San Francisco | CA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SDSmart Demolition & Excavation INC | San Francisco | CA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| SDSmiths Detection | San Francisco | CA | Computer and Electronic Product Manufacturing334517 | — | ◇ UNVERIFIED |
| SDSmiths Detection INC. | San Francisco | CA | Computer and Electronic Product Manufacturing334517 | — | ◇ UNVERIFIED |
| SDSmiths Detection, INC - Sfo Airport | San Francisco | CA | Computer and Electronic Product Manufacturing334517 | — | ◇ UNVERIFIED |
| SSSmith Signs INC | San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SISolher Iron, Inc. | San Francisco | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| SSSoracco & Soracco | San Francisco | CA | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| SFSource Foundry | San Francisco | CA | Computer and Electronic Product Manufacturing334515 | — | ◇ UNVERIFIED |
| SASoutheast Asian Food Product, Inc. | San Francisco | CA | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| SISpan.io. INC | San Francisco | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| SASpeyer and Schwartz | San Francisco | CA | Beverage and Tobacco Product Manufacturing312230 | — | ◇ UNVERIFIED |
| SCSpinelli Coffee Company | San Francisco | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| SSpirulinex | San Francisco | CA | Food Manufacturing311942 | — | ◇ UNVERIFIED |
| SSStandard Sheet Metal & Marine Plumbing | San Francisco | CA | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| SEStanford Energy Systems | San Francisco | CA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| SOState Of Flux Inc. | San Francisco | CA | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| SRStcici (10 Roads Express) | San Francisco | CA | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| SASterling Art Services | San Francisco | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| SEStonestown Endodontics | San Francisco | CA | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| S8Studio 89 | San Francisco | CA | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
Subsea Global Solutions | San Francisco | CA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| SSuperduperstudio ,llc | San Francisco | CA | Nonmetallic Mineral Product Manufacturing327213 | — | ◇ UNVERIFIED |
| SDSwope Design Solutions | San Francisco | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| SASynergy Apparel, LLC | San Francisco | CA | Apparel Manufacturing315299 | — | ◇ UNVERIFIED |
| SMSyn Mar Cultured Marble, INC | San Francisco | CA | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| SSzaboworks | San Francisco | CA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| TKTailors' Keep LLC | San Francisco | CA | Apparel Manufacturing315210 | — | ◇ UNVERIFIED |
| TLTehama Lofts Hoa | San Francisco | CA | Paper Manufacturing322219 | — | ◇ UNVERIFIED |
| TATempo Automation INC | San Francisco | CA | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| TAThe Aesthetic Union | San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| TCThe Carpenter Group | San Francisco | CA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| TDThe Dunlevie Company LLC | San Francisco | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TFThe Fineroot Project, INC | San Francisco | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| TGThe Good Chocolate LLC | San Francisco | CA | Food Manufacturing311351 | — | ◇ UNVERIFIED |
| THThe Hamlin School | San Francisco | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| TDTheo Defriese and Sons | San Francisco | CA | Furniture and Related Product Manufacturing337920 | — | ◇ UNVERIFIED |