| BBBlue Bottle Coffee Company | Oakland | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| BOBlueshift Optics LLC | Oakland | CA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| BSBlue Sky Biofuels, LLC | Oakland | CA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| BIBob's Iron, INC. | Oakland | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BIBob's Iron, INC. | Oakland | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BIBob's Iron, INC. | Oakland | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BPB & P Cultured Marble INC | Oakland | CA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| BTBruce's Tire INC | Oakland | CA | Plastics and Rubber Products Manufacturing326211 | — | ◇ UNVERIFIED |
| CTCafe Tartine LLC | Oakland | CA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| CCCalifornia Cannabinoids, Manufacturing Division | Oakland | CA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| CCCalifornia Cereal Products INC | Oakland | CA | Food Manufacturing311230 | — | ◇ UNVERIFIED |
| CGCalifornia Generator Service CORP | Oakland | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| CSCamblin Steel INC | Oakland | CA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| CCemex | Oakland | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCemex Construction Materials Pacific LLC | Oakland | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CVCental Valley Ag | Oakland | NE | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| CCCentral Concrete Supply | Oakland | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCCentral Concrete Supply a U S Concrete Company | Oakland | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CVCentral Valley Ag Services | Oakland | CA | Transportation Equipment Manufacturing336110 | — | ◇ UNVERIFIED |
| CCenveo | Oakland | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CACharles Allen | Oakland | CA | Machinery Manufacturing333243 | — | ◇ UNVERIFIED |
| CNChor Ng Revocable Trust / Ghost Ship | Oakland | CA | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| CFChris French Metal INC | Oakland | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| CCChristian Church Homes | Oakland | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CPChudo Pechka | Oakland | CA | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CSCissy S Ung | Oakland | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| COCity of Oakland | Oakland | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| COCity of Oakland , Envr Scvs Di | Oakland | CA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| CJC & J Contracting, INC. | Oakland | CA | Textile Mills313310 | — | ◇ UNVERIFIED |
| CPClaro Pallets | Oakland | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| CICm&b, INC. | Oakland | CA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| CLCoast Litho Printing INC | Oakland | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CCCompass Container Group INC | Oakland | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| CCCompass Container Group INC | Oakland | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| CMContinental Machine Works, INC | Oakland | CA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CSCook San Francisco LLC | Oakland | CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| CPCopy Plus | Oakland | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CICoschem, INC | Oakland | CA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CCourtsmith | Oakland | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CACousin Anthony's Urban Style Sauces and | Oakland | CA | Food Manufacturing311941 | — | ◇ UNVERIFIED |
| CECreative Energy Foods INC. | Oakland | CA | Food Manufacturing311340 | — | ◇ UNVERIFIED |
| CICreative Iron | Oakland | CA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| CCCritical Consulting | Oakland | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCCrooked City Cider | Oakland | CA | Beverage and Tobacco Product Manufacturing312130 | — | ◇ UNVERIFIED |
| CCCross Cultured Foods Pbc | Oakland | CA | Food Manufacturing311824 | — | ◇ UNVERIFIED |
| CECrown Equipment Corporation | Oakland | NJ | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| CECumulus Energy Storage | Oakland | CA | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
| CWCustom Wood Finishing | Oakland | CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| DMDark Metal Machine Works | Oakland | CA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| DMDavid M Lincer Dba Rollin Along | Oakland | CA | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |