| BGBidell Gas Compression | Weirton | WV | Machinery Manufacturing333912 | 100-499 | ◐ LIKELY ACTIVE |
| BCBiery Cheese CO | Louisville | OH | Food Manufacturing311513 | 100-499 | ◐ LIKELY ACTIVE |
| BEBig Escambia Spirits LLC | Atmore | AL | Beverage and Tobacco Product Manufacturing312140 | 1-19 | ◐ LIKELY ACTIVE |
| BHBig Heart | Buffalo | NY | Food Manufacturing311111 | 100-499 | ◐ LIKELY ACTIVE |
| BJBig John Mfg. CORP | Heber Springs | AR | Machinery Manufacturing333111 | 1-19 | ◐ LIKELY ACTIVE |
| BRBig Rapids Products | Big Rapids | MI | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| BRBig River Resources | West Burlington | IA | Chemical Manufacturing325193 | 20-99 | ◐ LIKELY ACTIVE |
| BRBig River Resources Boyceville, LLC | Boyceville | WI | Chemical Manufacturing325193 | 20-99 | ◐ LIKELY ACTIVE |
| BRBig River United Energy, LLC | Dyersville | IA | Chemical Manufacturing325193 | 20-99 | ◐ LIKELY ACTIVE |
| BSBig Sky Edm, INC | Hayden | ID | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| BSBig Sky Insulations, Inc | Belgrade | MT | Plastics and Rubber Products Manufacturing326140 | 20-99 | ◐ LIKELY ACTIVE |
| BOBihler of America INC | Phillipsburg | NJ | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |
| BSBills Signs & Service INC | Tallahassee | FL | Fabricated Metal Product Manufacturing332321 | 1-19 | ◐ LIKELY ACTIVE |
Bimco, INC | Salt Lake City | UT | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| BRBind Rite Services INC | South Hackensack | NJ | Printing and Related Support Activities323117 | 100-499 | ◐ LIKELY ACTIVE |
| BKBindtech Kp | Church Hill | TN | Printing and Related Support Activities323117 | 20-99 | ◐ LIKELY ACTIVE |
| BTBingham & Taylor CORP. | Culpeper | VA | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| BIBiokyowa, INC. | Cape Girardeau | MO | Food Manufacturing311119 | 100-499 | ◐ LIKELY ACTIVE |
| BIBiolab INC | Westlake | LA | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| BIBio-lab Incorporated | Conyers | GA | Chemical Manufacturing325612 | 1-19 | ◐ LIKELY ACTIVE |
| BPBiomedical Polymers INC | Sterling | MA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| BNBiomerics Nle LLC | Monroe | CT | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| BIBiomet INC | Warsaw | IN | Computer and Electronic Product Manufacturing334510 | — | ◐ LIKELY ACTIVE |
| BIBiotec INC | Zeeland | MI | Miscellaneous Manufacturing339114 | 20-99 | ◐ LIKELY ACTIVE |
| BRBiotics Research | Rosenberg | TX | Food Manufacturing311999 | 100-499 | ◐ LIKELY ACTIVE |
| BEBio-zyme Enterprises INC | St Joseph | MO | Food Manufacturing311119 | 20-99 | ◐ LIKELY ACTIVE |
Bi Ra Systems INC | Albuquerque | NM | Computer and Electronic Product Manufacturing334418 | 1-19 | ◐ LIKELY ACTIVE |
| BVBitner Vineyards | Caldwell | ID | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| BSBitzer Scroll, INC. | Syracuse | NY | Machinery Manufacturing333415 | 100-499 | ◐ LIKELY ACTIVE |
| BJB & J Atlantic INC | Jacksonville | FL | Machinery Manufacturing333996 | 1-19 | ◐ LIKELY ACTIVE |
| BLB-k Lighting | Madera | CA | Electrical Equipment, Appliance & Component Manufacturing335121 | 20-99 | ◐ LIKELY ACTIVE |
| BKB K Tool and Design INC | Kalida | OH | Machinery Manufacturing333514 | 100-499 | ◐ LIKELY ACTIVE |
| BBBlackfoot Brass | Blackfoot | ID | Primary Metal Manufacturing331529 | 20-99 | ◐ LIKELY ACTIVE |
Black Iron Rubber CO | Babbitt | MN | Plastics and Rubber Products Manufacturing326291 | — | ◐ LIKELY ACTIVE |
| BRBlager Ready Mix Concrete Production | Urbana | IL | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| BMBlair Machine & Tool, INC. | Jacksonville | FL | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◐ LIKELY ACTIVE |
| BMBlair Milling & Elevator CO INC. | Atchison | KS | Food Manufacturing311119 | 1-19 | ◐ LIKELY ACTIVE |
| BRBlair Rubber CO | Seville | OH | Plastics and Rubber Products Manufacturing326299 | 20-99 | ◐ LIKELY ACTIVE |
Blanchat Manufacturing INC | Harper | KS | Transportation Equipment Manufacturing336211 | 1-19 | ◐ LIKELY ACTIVE |
| BMBlase Manufacturing | Stratford | CT | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| BCBlast Cleaning Technologies | West Allis | WI | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| BTBlast Tech LLC | Broussard | LA | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
Blauer Manufacturing Co., INC. | Boston | MA | Apparel Manufacturing315250 | 100-499 | ◐ LIKELY ACTIVE |
| BLBleachtech LLC | Seville | OH | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| BGBlenko Glass CO INC | Milton | WV | Nonmetallic Mineral Product Manufacturing327212 | 20-99 | ◐ LIKELY ACTIVE |
| BFBl Fabricators, INC. | Scottsboro | AL | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| BIBlistex INC | Oak Brook | IL | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| BTBlonder Tongue Laboratories | Old Bridge | NJ | Computer and Electronic Product Manufacturing334220 | 20-99 | ◐ LIKELY ACTIVE |
| BMBloomfield Manufacturing Company INC. | Bloomfield | IN | Fabricated Metal Product Manufacturing332212 | 20-99 | ◐ LIKELY ACTIVE |
| BMBls Milton Truss | Milton | FL | Wood Product Manufacturing321214 | 20-99 | ◐ LIKELY ACTIVE |