| BMBemis Manufacturing | Sheboygan Falls | WI | Wood Product Manufacturing321219 | 500+ | ◐ LIKELY ACTIVE |
| BKBenchmade Knife Company | Oregon City | OR | Fabricated Metal Product Manufacturing332211 | 100-499 | ◐ LIKELY ACTIVE |
Bergkamp INC | Salina | KS | Machinery Manufacturing333120 | — | ◐ LIKELY ACTIVE |
| BWBernard Welding | Beecher | IL | Machinery Manufacturing333992 | 100-499 | ◐ LIKELY ACTIVE |
| BEBest Equipment and Welding | Indianapolis | IN | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| BBestolife | Irving | TX | Petroleum and Coal Products Manufacturing324191 | 20-99 | ◐ LIKELY ACTIVE |
| BSBestway South, INC. | Stony Point | NC | Wood Product Manufacturing321114 | 20-99 | ◐ LIKELY ACTIVE |
| BFBete Fog Nozzle INC. | Greenfield | MA | Fabricated Metal Product Manufacturing332919 | 100-499 | ◐ LIKELY ACTIVE |
| BCBeverage-air CO | Brookville | PA | Fabricated Metal Product Manufacturing332420 | 20-99 | ◐ LIKELY ACTIVE |
| BSBeynon Sports Surfaces, INC. | Hunt Valley | MD | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| BCBiery Cheese CO | Louisville | OH | Food Manufacturing311513 | 100-499 | ◐ LIKELY ACTIVE |
| BHBig Heart Pet Brands | Buffalo | NY | Food Manufacturing311111 | 100-499 | ◐ 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 |
| BIBio-lab Incorporated | Conyers | GA | Chemical Manufacturing325612 | 1-19 | ◐ LIKELY ACTIVE |
| BNBiomerics Nle LLC | Monroe | CT | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| BBBlackfoot Brass | Blackfoot | ID | Primary Metal Manufacturing331529 | 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 | — | ◐ LIKELY ACTIVE |
| BLBleachtech LLC | Seville | OH | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| BFBlue Flint Ethanol | Underwood | ND | Chemical Manufacturing325193 | 20-99 | ◐ LIKELY ACTIVE |
| BRBlue Ridge Fiberboard, INC. | Danville | VA | Wood Product Manufacturing321219 | 100-499 | ◐ LIKELY ACTIVE |
| BBBluescope Buildings North America INC | Visalia | CA | Fabricated Metal Product Manufacturing332311 | 100-499 | ◐ LIKELY ACTIVE |
| BCBluescope Coated Products | Middletown | OH | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| BTBluewater Thermal Solutions-rockford | Rockford | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| BHBoar's Head Provisions CO INC | Forrest City | AR | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| BHBoar's Head Provisions Co., INC. | New Castle | IN | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| BTBoiler Tube CO of America Lyman Facility | Lyman | SC | Fabricated Metal Product Manufacturing332313 | 100-499 | ◐ LIKELY ACTIVE |
| BHBollinger Houma Shipyards LLC -bollinger Houma Shipyards | Houma | LA | Transportation Equipment Manufacturing336611 | 100-499 | ◐ LIKELY ACTIVE |
| BSBollinger Shipyards Lockport LLC | Lockport | LA | Transportation Equipment Manufacturing336611 | 500+ | ◐ LIKELY ACTIVE |
| BABoose at Cornwall INC | Lebanon | PA | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| BLBoozer Laminated Beam Co., INC. | Anniston | AL | Wood Product Manufacturing321213 | 20-99 | ◐ LIKELY ACTIVE |
| BUBorregaard USA INC | Rothschild | WI | Chemical Manufacturing325190 | 100-499 | ◐ LIKELY ACTIVE |
| BBoumatic | Madison | WI | Chemical Manufacturing325320 | 100-499 | ◐ LIKELY ACTIVE |
| BGBowling Green Metalforming LLC | Bowling Green | KY | Fabricated Metal Product Manufacturing332999 | 500+ | ◐ LIKELY ACTIVE |
| BLBpi Labs | Evanston | WY | Chemical Manufacturing325620 | — | ◐ LIKELY ACTIVE |
| BSBradley Services INC | Morton | IL | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| BWBrady Worldwide - Florist Ave Plt | Glendale | WI | Paper Manufacturing322200 | 100-499 | ◐ LIKELY ACTIVE |
| BWBrakebush Wells | Wells | MN | Food Manufacturing311612 | 100-499 | ◐ LIKELY ACTIVE |
| BMBrasscraft Manufacturing Company | Thomasville | NC | Fabricated Metal Product Manufacturing332813 | 100-499 | ◐ LIKELY ACTIVE |
| BMBraxton Mfg | Tustin | CA | Fabricated Metal Product Manufacturing332116 | — | ◐ LIKELY ACTIVE |
Brazecom Industries, LLC | Weare | NH | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| BCBrewster Cheese CO | Stockton | IL | Food Manufacturing311513 | 20-99 | ◐ LIKELY ACTIVE |
| BEBridgeport Ethanol LLC | Bridgeport | NE | Chemical Manufacturing325193 | 20-99 | ◐ LIKELY ACTIVE |
| BMBristol Metals Limited Partnership | Bristol | TN | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| BEBriteline Extrusions INC | Summerville | SC | Primary Metal Manufacturing331316 | 20-99 | ◐ LIKELY ACTIVE |
| BWBrookfield Wire CO INC | West Brookfield | MA | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| BCBuilders Concrete East | Windham | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| BHBulk Handling Systems | Eugene | OR | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| BMBull Moose Tube | Gerald | MO | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |