| BIBK Iron Works Corp | Brooklyn | NY | — | ◇ UNVERIFIED |
| BDBlack Dog Consulting INC Dba Ch Yarber Constructio | Cheyenne | WY | — | ◇ UNVERIFIED |
| BEBlackhawk Enterprises Company | San Marcos | TX | — | ◇ UNVERIFIED |
| BHBlack Hills Railings LLC | Rapid City | SD | — | ◇ UNVERIFIED |
| BOBlack Oak Foundry | Ontario | CA | — | ◇ UNVERIFIED |
| BWBlackwell's Welding, INC. | Jessup | MD | — | ◇ UNVERIFIED |
| BCBlank & Cables INC | Oakland | CA | — | ◇ UNVERIFIED |
| BSBlazing Structure Steel INC | Riverside | CA | — | ◇ UNVERIFIED |
| BLB Line Systems Incorporated | Norcross | GA | — | ◇ UNVERIFIED |
| BLB & L Steel Fabrications, INC. | Prairieville | LA | — | ◇ UNVERIFIED |
| BTBlt Tanks, L.l.c. | Corinth | MS | — | ◇ UNVERIFIED |
| BIBluearc Innovations LLC / Bluearc Innovations LLC | Marlow | OK | — | ◇ UNVERIFIED |
| BDBlue Dot Steel & Supply, INC. | Tempe | AZ | — | ◇ UNVERIFIED |
| BMBlueline Manufacturing INC | Moxee | WA | — | ◇ UNVERIFIED |
| BRBlue Ridge Fabricators, INC. | Roanoke | VA | — | ◇ UNVERIFIED |
| BWBlue Water Manufacturing LLC | Chaska | MN | — | ◇ UNVERIFIED |
| BWBluewater Welding and Fabrication, LLC. | Dennisville | NJ | — | ◇ UNVERIFIED |
| BEBlum Enterprises, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| BFBMC Fabrication & Erection, Inc | Spanish Fork | UT | — | ◇ UNVERIFIED |
| BMBmg Metals INC | Richmond | VA | — | ◇ UNVERIFIED |
| BMB&m Metal Doors & Frames, INC. | Kenner | LA | — | ◇ UNVERIFIED |
| BNB N J Iron Wks | Cudahy | CA | — | ◇ UNVERIFIED |
| BEBobby Emery Welding | Clayton | NM | — | ◇ UNVERIFIED |
| BMBob Murphy, INC. | Vestal | NY | — | ◇ UNVERIFIED |
| BEBobro Engineering | Goleta | CA | — | ◇ UNVERIFIED |
| BSBob Sandlin CO. | Dallas | TX | — | ◇ UNVERIFIED |
| BIBob's Iron, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| BIBob's Iron, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| BIBob's Iron, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| BEBo Edwards | Savannah | TN | — | ◇ UNVERIFIED |
| BEBoggs Equipment & Engineering | Colusa | CA | — | ◇ UNVERIFIED |
| BWBohnert Welding | Jewell | KS | — | ◇ UNVERIFIED |
| BMBoise Metal Works, Inc. | Boise | ID | — | ◇ UNVERIFIED |
| BSBolling Steel Co., INC. | Salem | VA | — | ◇ UNVERIFIED |
| BIBolted Iron INC | Brooklyn | NY | — | ◇ UNVERIFIED |
| BSBonner Sheet Metal CORP. | Auburn | MA | — | ◇ UNVERIFIED |
| BFBootheel Fence Company, INC. | Jackson | MO | — | ◇ UNVERIFIED |
| BSBorrmann Steel CO. | East Palo Alto | CA | — | ◇ UNVERIFIED |
| BRBoston Renaissance Charter School | Boston (hyde Park) | MA | — | ◇ UNVERIFIED |
| BBBostrom Bergen Metal Products | Oakland | CA | — | ◇ UNVERIFIED |
| BFBoundary Fence & Railing Systems, INC. | Rochester | NY | — | ◇ UNVERIFIED |
| BFBoundary Fence & Railing Systems, INC. | Marlborough | MA | — | ◇ UNVERIFIED |
| BIBourgault Industries LTD | Minot | ND | — | ◇ UNVERIFIED |
| BIBovic Industries INC | Lebanon | OR | — | ◇ UNVERIFIED |
| BFBowen Fabrication & Welding, LLC | Centerville | UT | — | ◇ UNVERIFIED |
| BOBoys of Nevada | Las Vegas | NV | — | ◇ UNVERIFIED |
| BPB & P Fabricating Company | College Park | GA | — | ◇ UNVERIFIED |
| BIBps Incorporated | Minneapolis | MN | — | ◇ UNVERIFIED |
| BMBradfield Manufacturing INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| BMBradfield Mfg CO | Santa Ana | CA | — | ◇ UNVERIFIED |
| BNBradFord Now LLC | Benson | AZ | — | ◇ UNVERIFIED |
| BUBrass Unique Metal Products INC | South El Monte | CA | — | ◇ UNVERIFIED |
| BLBrenda L. Mathews | Newark | CA | — | ◇ UNVERIFIED |
| BWBrian W Vicklund | White City | OR | — | ◇ UNVERIFIED |
| BEBridges Equipment Services & Custom Fabrication INC | Eufaula | AL | — | ◇ UNVERIFIED |
| BBrilar | Novi | MI | — | ◇ UNVERIFIED |
| BMBristol Metals, INC. | Bloomfield | NY | — | ◇ UNVERIFIED |
| BTBroadwind Towers | Manitowoc | WI | — | ◇ UNVERIFIED |
| BSBroemeling Steel and Machine | Lewiston | ID | — | ◇ UNVERIFIED |
| BBBroken Bridge, LLC | Salem | OR | — | ◇ UNVERIFIED |
| BABrooks Automation Inc., Brooks Life Sciences | El Segundo | CA | — | ◇ UNVERIFIED |
 Brooks Industrial Marketplace | Fontana | CA | — | ◇ UNVERIFIED |
| BWBrooks Welding, INC. | Valdosta | GA | — | ◇ UNVERIFIED |
| BOBrothers Ornamental Iron | Fresno | CA | — | ◇ UNVERIFIED |
| BCBrown Campbell Company | Milwaukee | WI | — | ◇ UNVERIFIED |
| BCBrown-campbell Company | Maple Heights | OH | — | ◇ UNVERIFIED |
| BGBrown Gates CO LLC | Liberty | KY | — | ◇ UNVERIFIED |
| BHBrown Hawk LLC Dba Northern Lights Steel Fab | North Branch | MN | — | ◇ UNVERIFIED |
| BMBrown Machine LLC | Beaverton | MI | — | ◇ UNVERIFIED |
| BCBrown's Certified Welding INC | Bristol | VT | — | ◇ UNVERIFIED |
| BGBrown's Greens | Brooksville | ME | — | ◇ UNVERIFIED |
| BOBrownsville Ornamental Iron Works, INC. | Pensacola | FL | — | ◇ UNVERIFIED |
| BFBryant Fuel & Power Systems INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| BIBrzozka Industries INC. | Holbrook | NY | — | ◇ UNVERIFIED |
| BCBsm Coram North America INC | Burnsville | MN | — | ◇ UNVERIFIED |
| BMB&S Millwright LLC | Mendon | OH | — | ◇ UNVERIFIED |
| BFBta Fabrication LLC | Mesa | AZ | — | ◇ UNVERIFIED |
| BKBuck Kreihs Marine Repair LLC | New Orleans | LA | — | ◇ UNVERIFIED |
| BGBuffalo Grating LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| BSBuffalo Structural Steel, INC. | Titusville | PA | — | ◇ UNVERIFIED |
| BIBuhler Industries | Willmar | MN | — | ◇ UNVERIFIED |
| BMBuhler Manufacturing | Fargo | ND | — | ◇ UNVERIFIED |
| BVBuhler Versatile USA INC | Willmar | MN | — | ◇ UNVERIFIED |
| BFBuilders Firstsource - Southeast Group, LLC | Shelby | AL | — | ◇ UNVERIFIED |
| BMBuilders Metal Supply | Louisville | KY | — | ◇ UNVERIFIED |
| BSBuilders Screen and Aluminum | Westwood | KS | — | ◇ UNVERIFIED |
| BSBuilders Steel Company | Kansas City | MO | — | ◇ UNVERIFIED |
| BSBuilders Steel Company | Overland Park | KS | — | ◇ UNVERIFIED |
| BSBuilders Steel INC / 1924 S 49th W Ave Steel Fab Shop | Tulsa | OK | — | ◇ UNVERIFIED |
| BEBuilding Envelope Systems | Plainville | MA | — | ◇ UNVERIFIED |
| BIBuildwise INC | El Cajon | CA | — | ◇ UNVERIFIED |
| BWBulldog Welding and Specialties LLC | The Dalles | OR | — | ◇ UNVERIFIED |
| BRBull Run Machine & Wldg Co* | Knoxville | TN | — | ◇ UNVERIFIED |
| BABurke and Company, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| BIBusby International | Moses Lake | WA | — | ◇ UNVERIFIED |
| BIBusch Iron & Steel CO INC | Knoxville | TN | — | ◇ UNVERIFIED |
| BCButler Compressor Ii | Carson | CA | — | ◇ UNVERIFIED |
| BWB & W Manufacturing Company | Tulsa | OK | — | ◇ UNVERIFIED |
| BPBw Padilla INC Dba Brian's Welding | San Jose | CA | — | ◇ UNVERIFIED |
| BDBy Design Ornamentals | Riverside | CA | — | ◇ UNVERIFIED |
