| JCJ C Paper | South San Francisco | CA | Paper Manufacturing322230 | — | ◇ UNVERIFIED |
| JCJ C Paper, San Francisco Envelope Div | South San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| JIJeannette, INC. | South San Francisco | CA | Apparel Manufacturing315210 | — | ◇ UNVERIFIED |
| JTJuarez Tire Services Dba Juarez Tire Services & Auto Repair | South San Francisco | CA | Plastics and Rubber Products Manufacturing326211 | — | ◇ UNVERIFIED |
| JMJulio Martinez | South San Francisco | CA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| JLJuul Labs, INC. | South San Francisco | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| KTKinestral Technologies INC | South San Francisco | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| KGKk Graphics | South San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| LSLaboratory Skin Care INC | South San Francisco | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| LLLed Light Source, LLC | South San Francisco | CA | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◇ UNVERIFIED |
 Life Technologies | South San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| LTLpgs Tanforan LLC | South San Francisco | CA | Transportation Equipment Manufacturing336510 | — | ◇ UNVERIFIED |
| LSLuminous Solar West LLC | South San Francisco | CA | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| MWMacrogenics West INC | South San Francisco | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| MTMerge Therapeutics INC | South San Francisco | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| MMMina Metals CO INC | South San Francisco | CA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| MBMountanos Brothers Coffee | South San Francisco | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| NMNew Method Fur | South San Francisco | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NBNgm Biopharmaceuticals INC | South San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| NFNobell Foods INC | South San Francisco | CA | Food Manufacturing311513 | — | ◇ UNVERIFIED |
| PTPacific Truck Center | South San Francisco | CA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
 Pioneer Motor Bearing CO | South San Francisco | CA | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| PSPirtek Sfo | South San Francisco | CA | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| PPPp Pallets | South San Francisco | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| PIProfusa INC | South San Francisco | CA | Computer and Electronic Product Manufacturing334517 | — | ◇ UNVERIFIED |
| PPPyramid Printing & Graphics | South San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| PPPyramid Printing & Graphics | South San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| QBQuintara Biosciences INC | South San Francisco | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| RKRalph King Furniture and Cabinetry | South San Francisco | CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| RTRapt Therapeutics INC | South San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| RBRaven Biotechnologies INC | South San Francisco | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| RSRaymonds Sourdough Bread | South San Francisco | CA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| RCR C & a INC | South San Francisco | CA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| RReadyspaces | South San Francisco | CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| RFRev Fire Group | South San Francisco | CA | Transportation Equipment Manufacturing336992 | — | ◇ UNVERIFIED |
| RBRevmab Biosciences USA INC | South San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| RJRollin J Lobaugh, INC | South San Francisco | CA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| RDRoot Division | South San Francisco | CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SPSamson Press | South San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SFSan Francisco Window & Door Company INC | South San Francisco | CA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| SNSf Notes INC | South San Francisco | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| SCSfw&d Company, INC. | South San Francisco | CA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| SBShaw Bakers | South San Francisco | CA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| STShinobi Therapeutics INC. | South San Francisco | CA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| SESieger Engineering INC | South San Francisco | CA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| STSing Tao Newspaper (sf) LTD | South San Francisco | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| STSiteone Therapeutics | South San Francisco | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| SLSouthline - Lpgs Tanforan LLC | South San Francisco | CA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| STSpiral Therapeutics INC | South San Francisco | CA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| SASports and Graphics | South San Francisco | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
