| 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 |
| TTheranova | San Francisco | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| TFThermo Fisher Scientific | San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| TWThe Window and Door Shop, INC. | San Francisco | CA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| TYThe Yard Puc | San Francisco | CA | Transportation Equipment Manufacturing336992 | — | ◇ UNVERIFIED |
| TSThomas-swan Sign Company | San Francisco | CA | Beverage and Tobacco Product Manufacturing312230 | — | ◇ UNVERIFIED |
| TLThorp Lane Inc. | San Francisco | CA | Food Manufacturing311821 | — | ◇ UNVERIFIED |
| TEThyssenkrupp Elevator Corporation | San Francisco | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| TWTim Wicks Painting | San Francisco | CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| TCtinyB chocolate LLC | San Francisco | CA | Food Manufacturing311352 | — | ◇ UNVERIFIED |
| TTTom Taylor | San Francisco | CA | Furniture and Related Product Manufacturing337121 | — | ◇ UNVERIFIED |
| TSTonal Systems INC | San Francisco | CA | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| TPTransamerica Pyramid | San Francisco | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| TETrayer Engineering CORP | San Francisco | CA | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| TITreasure Island | San Francisco | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| TITreasure Island Development Authority | San Francisco | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| TITrilobio INC | San Francisco | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| TGTrue Gentlemen's Jerky | San Francisco | CA | Food Manufacturing311919 | — | ◇ UNVERIFIED |
| UPUcsf/hunters Point | San Francisco | CA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| USUnion Street Coffee Roastery INC | San Francisco | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| UCUnited Cabinet | San Francisco | CA | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| UTUnited Technologies Otis Eleva | San Francisco | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| VTViaex Technologies INC | San Francisco | CA | Textile Mills313230 | — | ◇ UNVERIFIED |
| VBVicente Beauty Salon | San Francisco | CA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |