 Bio Rad Laboratories INC | Pleasanton | CA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| BIBiosite INC | San Diego | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BIB I Technologies Corporation | Fullerton | CA | Computer and Electronic Product Manufacturing334415 | — | ◇ UNVERIFIED |
| BFBlackhawk Furniture INC | Riverside | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| BMBlackhawk Manufacturing, INC. | Rialto | CA | Chemical Manufacturing325181 | — | ◇ UNVERIFIED |
 Bloom Energy | Sunnyvale | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| Bloom Energy Corporation/nasa Research Park Bldg. 543 | Moffett Field | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| BMBloomers Metal Stampings | Valencia | CA | Fabricated Metal Product Manufacturing332214 | — | ◇ UNVERIFIED |
| BCBlue Coral INC Mckay Chemical | Los Angeles | CA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| BDBlue Diamond Materials | Sun Valley | CA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BDBlue Diamond Materials - South Gate Facility | South Gate | CA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BBBluetriton Brands | Ontario | CA | Beverage and Tobacco Product Manufacturing312112 | — | ◇ UNVERIFIED |
| BMBmc Modesto Nathan Bfs | Modesto | CA | Wood Product Manufacturing321214 | — | ◇ UNVERIFIED |
| BMBms Motorsports, INC | Riverside | CA | Transportation Equipment Manufacturing336991 | — | ◇ UNVERIFIED |
| BHBnsf Hobart Ramp | Los Angeles | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Huntington Park | CA | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| BNBoeing North American Rocketdyne | Canoga Park | CA | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| BSBoeing Satellite Systems INC | El Segundo | CA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
 Boston Scientific Structural Heart | Menlo Park | CA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| BGBourdelais Grinding Co, INC | Simi Valley | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| BCBoyd Corporation | Modesto | CA | Miscellaneous Manufacturing339991 | — | ◇ UNVERIFIED |
| BSBp Solar INC | Fairfield | CA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| BIBreg INC | Carlsbad | CA | Miscellaneous Manufacturing339113 | — | ◇ UNVERIFIED |
| BMBrek Manufacturing | Gardena | CA | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| BEBritech Electropolishing INC | Newark | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| BPBronzeway Plating CORP | Los Angeles | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| BBBrown & Bryant | Arvin | CA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| BFBrownwood Furniture, INC. | Rancho Cucamonga | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| BNBruker Nano INC | Camarillo | CA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| BRBryant Rubber CORP | Harbor City | CA | Miscellaneous Manufacturing339930 | — | ◇ UNVERIFIED |
| BKBuck Knives INC | El Cajon | CA | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| BVBuena Vista Foods | Azusa | CA | Food Manufacturing311919 | — | ◇ UNVERIFIED |
| BFBuilders Fence CO INC | Sun Valley | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BSBumper Shop INC. | Los Angeles | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| BOBunge Oils | Modesto | CA | Food Manufacturing311225 | — | ◇ UNVERIFIED |
| BBurbank | Burbank | CA | Fabricated Metal Product Manufacturing332111 | — | ◇ UNVERIFIED |
| BJBurton James INC | City of Industry | CA | Furniture and Related Product Manufacturing337121 | — | ◇ UNVERIFIED |
| BBButler Box & Stake | Santa Ana | CA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| BCBway Corporation | Fontana | CA | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
| CNC3 Nano, Incorporated | Hayward | CA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| CICacique INC | City of Industry | CA | Food Manufacturing311513 | — | ◇ UNVERIFIED |
| CKCadence Kitchen | Corona | CA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| CPCadillac Plating INC | Orange | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| CICalarco INC | Corcoran | CA | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| CMCalaveras Materials INC | Tracy | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CMCalaveras Materials INC | Lathrop | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CMCalaveras Materials INC | Turlock | CA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CECal Electroplating INC | Los Angeles | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
 Calgon Carbon Corporation | Blue Lake | CA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| CICalif Ind'l Prods,div of Ill Tool Works | Santa Fe Springs | CA | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
