| AWApeengineering - Wichita (wellington Pl) | Wichita | KS | — | ◇ UNVERIFIED |
| APApplied Process Fort Smith | Fort Smith | AR | — | ◇ UNVERIFIED |
| AEAptim Environmental & Infrastructure, INC. | Findlay | OH | — | ◇ UNVERIFIED |
| AEAsrc Energy Services Alaska INC - Anchorage Fabrication Facility | Anchorage | AK | — | ◇ UNVERIFIED |
| APAssembled Products | Buffalo Grove | IL | — | ◇ UNVERIFIED |
 Astech Engineered Products | Santa Ana | CA | — | ◇ UNVERIFIED |
| AA-tek | Brainerd | MN | — | ◇ UNVERIFIED |
| ASAtlas Screw and Specialty | New Bedford | MA | — | ◇ UNVERIFIED |
| AAAtmosphere Annealing LLC | North Vernon | IN | — | ◇ UNVERIFIED |
| AMAtomic Machine & Edm INC | Naples | FL | — | ◇ UNVERIFIED |
| ATA+ Trailer and Fabrication INC | Mayo | FL | — | ◇ UNVERIFIED |
| ALAustin-westran LLC | Byron | IL | — | ◇ UNVERIFIED |
| AFAuthority Flame Hardening & Straightening LLC | Chesterfield | MI | — | ◇ UNVERIFIED |
| APAutomation Plating CORP | Tucson | AZ | — | ◇ UNVERIFIED |
| ACAwh Corporation - Lofton Plant | Raphine | VA | — | ◇ UNVERIFIED |
| BBBartimaeus By Design INC. | Thomasville | NC | — | ◇ UNVERIFIED |
| BSBay Swiss Manufacturing | Dayton | NV | — | ◇ UNVERIFIED |
| BBB & B Pipe & Tool Company | Long Beach | CA | — | ◇ UNVERIFIED |
| BIBc Industries | Oxford | MA | — | ◇ UNVERIFIED |
| BRBesco Recycling | Bessemer | AL | — | ◇ UNVERIFIED |
| B3Big 3 Precision Prod INC | Centralia | IL | — | ◇ UNVERIFIED |
| BMBiltrite Metal Products | Leland | IL | — | ◇ UNVERIFIED |
| BMBirmingham Metal Products INC | Birmingham | OH | — | ◇ UNVERIFIED |
| BLB L Fabricators, INC. | Scottsboro | AL | — | ◇ UNVERIFIED |
| BHBlp Holdings | Houston | TX | — | ◇ UNVERIFIED |
| BMBluegrass Mine Tool, INC. | Madisonville | KY | — | ◇ UNVERIFIED |
| BSBlue Sky Burning and Excavating - Air Cu | Phoenix | AZ | — | ◇ UNVERIFIED |
| BTBluewater Thermal Solutions Chicago 1 | Northlake | IL | — | ◇ UNVERIFIED |
| BCB&m Carbide Cleaners | Crofton | KY | — | ◇ UNVERIFIED |
| BWBobe Water & Fire LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| BBBob's Barricades | N Fort Myers | FL | — | ◇ UNVERIFIED |
| BBodycote | Indianapolis | IN | — | ◇ UNVERIFIED |
| BIBodycote Inc/bodycote Thermal Processing | Los Angeles | CA | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Lansing | MI | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Fountain Inn | SC | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Worcester | MA | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Melrose Park | IL | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Canton | MI | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Morristown | TN | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Huntington Park | CA | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Saint Louis | MO | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Racine | WI | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing - Athens | Athens | AL | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing INC | Rochester | NY | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing, INC. - Lafayette | Lafayette | LA | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing, INC. - Okc | Oklahoma City | OK | — | ◇ UNVERIFIED |
| BTBoley Tool & Machine | East Peoria | IL | — | ◇ UNVERIFIED |
| BTBorgwarner Thermal Systems - Fletcher Plant | Fletcher | NC | — | ◇ UNVERIFIED |
| BRBosch Rexroth CORP | Fountain Inn | SC | — | ◇ UNVERIFIED |
| BTBoston Trailer Manufacturing Company | Walpole | MA | — | ◇ UNVERIFIED |
| BSBoulder Steel, INC | Broomfield | CO | — | ◇ UNVERIFIED |
| BMBraddock Metallurgical - Ga | Atlanta | GA | — | ◇ UNVERIFIED |
| BCBradley CORP | Germantown | WI | — | ◇ UNVERIFIED |
| BCBrazing Concepts | Coldwater | MI | — | ◇ UNVERIFIED |
| BBrazonics | Hampton | NH | — | ◇ UNVERIFIED |
| BCBridgewater Correctional Complex | Bridgewater | MA | — | ◇ UNVERIFIED |
| BEBrierton Engineering | Abilene | KS | — | ◇ UNVERIFIED |
| BNBright N Ready Signs & Awnings | Englewood | FL | — | ◇ UNVERIFIED |
| BIBrudi INC Kelso | Kelso | WA | — | ◇ UNVERIFIED |
| BBBrundage Bone Concrete | Kent | WA | — | ◇ UNVERIFIED |
| BRBull Run Machine and Welding | Knoxville | TN | — | ◇ UNVERIFIED |
| BEBurlington Engineering Incorporated | Orange | CA | — | ◇ UNVERIFIED |
| BSBurning Systems, INC | Pueblo | CO | — | ◇ UNVERIFIED |
| BIBurtman Iron Works | Boston | MA | — | ◇ UNVERIFIED |
| CCCajon CO Aurora | Aurora | OH | — | ◇ UNVERIFIED |
| CACalumet Armature & Electric LLC | Riverdale | IL | — | ◇ UNVERIFIED |
| CMCanton Manufacturing CORP. | Canton | MI | — | ◇ UNVERIFIED |
| CICarboloy INC | Warren | MI | — | ◇ UNVERIFIED |
| CICardinal Ig Site | Spring Green | WI | — | ◇ UNVERIFIED |
| CRCardinal Rotar | Spring Green | WI | — | ◇ UNVERIFIED |
| CPCarpenter & Paterson INC | Saddle Brook Twp | NJ | — | ◇ UNVERIFIED |
| CMCascade Metallurgical INC | Kent | WA | — | ◇ UNVERIFIED |
| CICaterpillar, INC. | Thomasville | GA | — | ◇ UNVERIFIED |
| CDC & D Welding & Fabrication INC | Jonesville | MI | — | ◇ UNVERIFIED |
| CMCenter Manufacturing Company | Bellevue | OH | — | ◇ UNVERIFIED |
| CFCertified Fabricators INC | Buena Park | CA | — | ◇ UNVERIFIED |
| CMCertified Metal Craft | El Cajon | CA | — | ◇ UNVERIFIED |
| CRCff Recycling USA / 100 N Bath | Oklahoma City | OK | — | ◇ UNVERIFIED |
| CMChancey Metal Products, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
 Chancey Metals LLC Annex | Jacksonville | FL | — | ◇ UNVERIFIED |
| CMChanute Manufacturing (stormwater) | Chanute | KS | — | ◇ UNVERIFIED |
| CSCharleston Steel & Metal CO | Charleston | SC | — | ◇ UNVERIFIED |
| CRChemetron Railway Products Inc-true-temper Plant | Kansas City | MO | — | ◇ UNVERIFIED |
 Chief Industries INC Chief Transportation Products | Omaha | NE | — | ◇ UNVERIFIED |
| CCignys | Saginaw | MI | — | ◇ UNVERIFIED |
| CPCleveland-cliffs Piedmont | Newton | NC | — | ◇ UNVERIFIED |
| CICmc Impact Metals | Chicora | PA | — | ◇ UNVERIFIED |
| CSCmc Steel Us, LLC | Nashville | TN | — | ◇ UNVERIFIED |
| CECockburn Enterprises INC | Muscle Shoals | AL | — | ◇ UNVERIFIED |
| CICollis INC | Elizabethtown | KY | — | ◇ UNVERIFIED |
| CCColson Caster Corporation | Jonesboro | AR | — | ◇ UNVERIFIED |
| CBColumbia Business Center Bldg 33 | Vancouver | WA | — | ◇ UNVERIFIED |
| CICommercial Induction | Cleveland | OH | — | ◇ UNVERIFIED |
| CSCommercial Steel Treating Corporation | Madison Hts | MI | — | ◇ UNVERIFIED |
| CSCompx Securityproducts | River Grove | IL | — | ◇ UNVERIFIED |
| CSConnectivity Solutions Mfg Incorporated | Omaha | NE | — | ◇ UNVERIFIED |
| CCConnector Castings INC | Selmer | TN | — | ◇ UNVERIFIED |
| CEConsolidated Engineer | Kennesaw | GA | — | ◇ UNVERIFIED |
| CPContinental Powertrain USA LLC | Fountain Inn | SC | — | ◇ UNVERIFIED |
| CICopelands, INC. | Ooltewah | TN | — | ◇ UNVERIFIED |
