| BRBert R Huncilman and Son INC | New Albany | IN | — | ◇ UNVERIFIED |
| BFBest-way Fabricating INC | Saint Joseph | MN | — | ◇ UNVERIFIED |
| BBBetter Bilt Sheet Metal LLC | San Antonio | TX | — | ◇ UNVERIFIED |
| BMBetter Maintenance Sheet Metal CORP. | Newburyport | MA | — | ◇ UNVERIFIED |
| BIBfs Industries, LLC | Butner | NC | — | ◇ UNVERIFIED |
| BMB.g. Metals, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| BTBh Tank Works INC Dba Bh Tank INC | Madera | CA | — | ◇ UNVERIFIED |
| BKBird Key Plan B LLC | Sarasota | FL | — | ◇ UNVERIFIED |
| BUBitzer US INC. | Flowery Branch | GA | — | ◇ UNVERIFIED |
| BJB & J, INC. | Sparks | NV | — | ◇ UNVERIFIED |
 Blackman, INC. | New Franken | WI | — | ◇ UNVERIFIED |
| BRBlack Rock Venture LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| BFBlazer Fabricating LLC | Chattanooga | TN | — | ◇ UNVERIFIED |
| BIBliss Industries INC | Fremont | CA | — | ◇ UNVERIFIED |
| BBBlue Bird Realty LLC | Linden | NJ | — | ◇ UNVERIFIED |
| BDBlue Diamond Sheet Metal, Inc. | Medford | NY | — | ◇ UNVERIFIED |
| BWBlue Water Fabricators INC | Shelby Township | MI | — | ◇ UNVERIFIED |
| BWBlue Wolf Capital Partners LLC Dba Snappy Air Dist | Detroit Lakes | MN | — | ◇ UNVERIFIED |
| BMB & M Metal Works | Catoosa | OK | — | ◇ UNVERIFIED |
| BMBng Management Group, LLC | Macon | GA | — | ◇ UNVERIFIED |
| BNB - N Sheet Metal INC | Wyoming | MN | — | ◇ UNVERIFIED |
| BMBob's Metal Shop LLC | Mesa | AZ | — | ◇ UNVERIFIED |
| BSBohnert Sheet Metal & Roofing CO. | Miami | FL | — | ◇ UNVERIFIED |
| BTBoiler Tube CO of America | La Porte | TX | — | ◇ UNVERIFIED |
| BMBombard Mechanical, LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| BIBonland Industries, INC. | Philadelphia | PA | — | ◇ UNVERIFIED |
| BIBos-hatten INC. | Orchard Park | NY | — | ◇ UNVERIFIED |
| BPBoss Precision LTD. | Spencerport | NY | — | ◇ UNVERIFIED |
| BMBp Metals LLC | Blaine | MN | — | ◇ UNVERIFIED |
| BIBradford Industries | Bradford | IL | — | ◇ UNVERIFIED |
| BABreidert Air Products Dba Soler & Palau Ventilatio | Jacksonville | FL | — | ◇ UNVERIFIED |
| BFBrenda Feit | Los Angeles | CA | — | ◇ UNVERIFIED |
| BEBreshears Enterprises, INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| BHBritton Holdings Limited Liability Company | Bloomfield | CT | — | ◇ UNVERIFIED |
| BIBrotech INC. | Payson | UT | — | ◇ UNVERIFIED |
| BWBrown Welding Company | Laurel | MD | — | ◇ UNVERIFIED |
| BDBruce & Dana Wholesale INC | Salem | OR | — | ◇ UNVERIFIED |
| BLBryanAprilbuilding LLC | Ogden | UT | — | ◇ UNVERIFIED |
| BSBryant Sheet Metal, INC. | Hanover | MA | — | ◇ UNVERIFIED |
| BMBtd Manufacturing INC | Detroit Lakes | MN | — | ◇ UNVERIFIED |
| BFBt Fab | Sparks | NV | — | ◇ UNVERIFIED |
| BTB & T Metal Works, INC. | Ocala | FL | — | ◇ UNVERIFIED |
| BOBuffalo Outfront Metalworks, L.p. | Buffalo | NY | — | ◇ UNVERIFIED |
| BMBulling Metal Works, INC. | San Leandro | CA | — | ◇ UNVERIFIED |
| BRBull Run Metal Fabricators & Engineers INC | Clinton | TN | — | ◇ UNVERIFIED |
| BRBull Run Metal, INC. | Manassas | VA | — | ◇ UNVERIFIED |
| BHBw Hvac Operations LLC | Portland | OR | — | ◇ UNVERIFIED |
| BNBwxt Nuclear Operations Group INC | Lynchburg | VA | — | ◇ UNVERIFIED |
| CSCabell Sheet Metal and Roofing, INC. | Ceredo | WV | — | ◇ UNVERIFIED |
| CMCabrac Mfg | San Fernando | CA | — | ◇ UNVERIFIED |
| CFCado Fabrications INC | Amesbury | MA | — | ◇ UNVERIFIED |
| CMCalco Metal Works, INC. | Lubbock | TX | — | ◇ UNVERIFIED |
| CSCalcor Space Fac INC | Whittier | CA | — | ◇ UNVERIFIED |
| CMCalhm Metals INC Dba Weld-kraft | Saint Louis Park | MN | — | ◇ UNVERIFIED |
| CACalifornia Air Conveying LLC | Paramount | CA | — | ◇ UNVERIFIED |
| CBCalifornia Business Environments, Inc | Morgan Hill | CA | — | ◇ UNVERIFIED |
| CCCalifornia Chassis INC | Anaheim | CA | — | ◇ UNVERIFIED |
| CFCalifornia Fabrication | Canoga Park | CA | — | ◇ UNVERIFIED |
| CMCalifornia Marine Cleaning | San Diego | CA | — | ◇ UNVERIFIED |
| CSCalifornia Sheet Metal INC | Sacramento | CA | — | ◇ UNVERIFIED |
| CAC & a Metal Finishing | Saint Louis | MO | — | ◇ UNVERIFIED |
| CICamin Industries INC | Brooklyn | NY | — | ◇ UNVERIFIED |
| CSCampo Sheet Metal Works, INC. | Houston | TX | — | ◇ UNVERIFIED |
| CMCanam Metal Prod | San Bernardino | CA | — | ◇ UNVERIFIED |
| CMCanfield Machine & Tool Div | Kingston | NY | — | ◇ UNVERIFIED |
| CPCanopies Plus, INC. | Eufaula | OK | — | ◇ UNVERIFIED |
| CCCapital City Culvert Corporation | Madison | WI | — | ◇ UNVERIFIED |
| CCaptiveaire | Englewood | OH | — | ◇ UNVERIFIED |
| CCaptiveaire | Redding | CA | — | ◇ UNVERIFIED |
| C3Captiveaire 360 Youngsville Addition | Youngsville | NC | — | ◇ UNVERIFIED |
| CDCarbon Designs | Springdale | AR | — | ◇ UNVERIFIED |
| CICarbon INC | Redwood City | CA | — | ◇ UNVERIFIED |
| CSCardinal Sheet Metal INC | Riverside | CA | — | ◇ UNVERIFIED |
| CFCarl Fisher Co., INC. | Springfield | MA | — | ◇ UNVERIFIED |
| CRCarpenter's Roofing & Sheet Metal, INC. | West Palm Beach | FL | — | ◇ UNVERIFIED |
| CICartel Industries LLC | Irvine | CA | — | ◇ UNVERIFIED |
| CSCarver Sheet Metal Works, Inc. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| CICastle Industries INC. of Ca. | Ontario | CA | — | ◇ UNVERIFIED |
| CICavotec Inet US INC. | Cypress | CA | — | ◇ UNVERIFIED |
| CSCb Strain & Son INC. | Tarrytown | NY | — | ◇ UNVERIFIED |
| CFC&c Fabrication, INC. | Carrollton | GA | — | ◇ UNVERIFIED |
| CDC & D Metal Products, INC. | Thornton | CO | — | ◇ UNVERIFIED |
| CRCedar Rock Holdings, LLC | Lenoir | NC | — | ◇ UNVERIFIED |
| CMCeh Metal Technologies Longmont Division | Longmont | CO | — | ◇ UNVERIFIED |
| CICentek INC / Centek Facility | Oklahoma City | OK | — | ◇ UNVERIFIED |
| CPCenterline Prefab LLC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| CSCenter Sheet Metal, INC. | Brooklyn | NY | — | ◇ UNVERIFIED |
| CMCenterville Manufacturing LLC | Centerville | SD | — | ◇ UNVERIFIED |
| CCCentral Cal Metals | Fresno | CA | — | ◇ UNVERIFIED |
| CFCentral Florida Metals AND Central FL Metals, LLC | Orlando | FL | — | ◇ UNVERIFIED |
| CKCentral Kentucky Industrial INC | Richmond | KY | — | ◇ UNVERIFIED |
| COCentral Ohio Sheet Metal Company | Reynoldsburg | OH | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal, LLC | Seminole | OK | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal, LLC | Wichita Falls | TX | — | ◇ UNVERIFIED |
| CSCentral Sheet Metal Products, INC. | Skokie | IL | — | ◇ UNVERIFIED |
| CSCentral States Manufacturing, INC. | Hartford | SD | — | ◇ UNVERIFIED |
| CWCentral Wisconsin Flex | Weston | WI | — | ◇ UNVERIFIED |
| CICew INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| CMCfc Manufacturing Co., INC. | Carbondale | PA | — | ◇ UNVERIFIED |
| CHCfm Heating & Air Conditioning INC | Ogden | UT | — | ◇ UNVERIFIED |
