 Forms+surfaces INC | Phoenix | AZ | — | ◇ UNVERIFIED |
| FFFormweld Fitting, INC. | Milton | FL | — | ◇ UNVERIFIED |
| FSForney Special Products | Dallas | TX | — | ◇ UNVERIFIED |
| FSFortitude Specialty Manufacturing, LLC | Houston | TX | — | ◇ UNVERIFIED |
| FPFort Peck Tech at Ans Industries | Poplar | MT | — | ◇ UNVERIFIED |
| FFFortville Feeders Incorporated | Fortville | IN | — | ◇ UNVERIFIED |
| FEForum Energy Technologies | Midland | TX | — | ◇ UNVERIFIED |
| FEForum Energy Technologies | Robstown | TX | — | ◇ UNVERIFIED |
| FEForum Energy Technologies | Guthrie | OK | — | ◇ UNVERIFIED |
| FAFought and Company, INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| FSFour Star Erectors, INC | San Francisco | CA | — | ◇ UNVERIFIED |
| FSFour Star Erectors, INC. | Livermore | CA | — | ◇ UNVERIFIED |
| FSFour Star, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| FBFran Bearing CO | Mayfield | KY | — | ◇ UNVERIFIED |
| FHFrancisco Hernandez Cruz & Francisco Emmanuel Hernandez-Serrato | Redwood City | CA | — | ◇ UNVERIFIED |
| FFFrancom Fabrication, LLC | Blanding | UT | — | ◇ UNVERIFIED |
| FIFrankenmuth Industrial Services | Frankenmuth | MI | — | ◇ UNVERIFIED |
| FMFrank Morrow Company | Providence | RI | — | ◇ UNVERIFIED |
| FCFrank's Custom Stainless | Pittsburgh | PA | — | ◇ UNVERIFIED |
| FIFrazier Industrial Company Production Facility - Plant 106 | Dyersburg | TN | — | ◇ UNVERIFIED |
| FMFredericksburg Machine & Steel LLC | Fredericksburg | VA | — | ◇ UNVERIFIED |
| FMFreeman Metal Products INC | Ahoskie | NC | — | ◇ UNVERIFIED |
| FNFrenzelit North America INC. | Lexington | NC | — | ◇ UNVERIFIED |
| FFFresno Fab Tech INC | Sanger | CA | — | ◇ UNVERIFIED |
| FIFriedman Industries, INC. | Decatur | AL | — | ◇ UNVERIFIED |
| FCFriedrichs Custom Manufacturing, INC | Jefferson | LA | — | ◇ UNVERIFIED |
| FAFritz Air, LLC | Torrington | CT | — | ◇ UNVERIFIED |
| FAFritz Aluminum Services, INC | Eustis | FL | — | ◇ UNVERIFIED |
| FSFritz Structural Steel INC | Valley Head | AL | — | ◇ UNVERIFIED |
| FGFrontier Gratings, LLC | Fort Payne | AL | — | ◇ UNVERIFIED |
| FMFrontier Manufacturing Company | Trenton | TX | — | ◇ UNVERIFIED |
| FMFrontier Metal Fabrications, Inc. | Battle Ground | WA | — | ◇ UNVERIFIED |
| FMFrontier Metal Fabrications, Inc. | Battle Ground | WA | — | ◇ UNVERIFIED |
| FRFront Range Steel INC | Wellington | CO | — | ◇ UNVERIFIED |
| FRFront Range Steel INC | Fort Collins | CO | — | ◇ UNVERIFIED |
| FRFront Row Builders INC Dba Sf Metalworks | Colusa | CA | — | ◇ UNVERIFIED |
| FRFry Reglet Corporation | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| FIFsr, INC. | Little Falls | NJ | — | ◇ UNVERIFIED |
| FEFulton Equipment | Toledo | OH | — | ◇ UNVERIFIED |
| FEFulton Equipment | Toledo | OH | — | ◇ UNVERIFIED |
| FCFunder Custom INC | Enoch | UT | — | ◇ UNVERIFIED |
| FSFurin - Shea Welding - Fabricating INC | Kelly Lake | MN | — | ◇ UNVERIFIED |
| FTFusion Targets, LLC | Orem | UT | — | ◇ UNVERIFIED |
| FAFuture Additive Manufacturing Aerospace, Inc | Chicago | IL | — | ◇ UNVERIFIED |
| FLFuturegenx L.l.c. | Boise | ID | — | ◇ UNVERIFIED |
| FLFwt LLC | Hicksville | OH | — | ◇ UNVERIFIED |
| GMG-2 Metal Fab | Stockton | CA | — | ◇ UNVERIFIED |
| GIGainesville Iron Works, INC. | Gainesville | FL | — | ◇ UNVERIFIED |
| GSGalaxy Stage LLC | La Puente | CA | — | ◇ UNVERIFIED |
| GIGalbreath, Incorporated | Mansfield | TX | — | ◇ UNVERIFIED |
| GDGalland Dr Laydown Yard | Shelbeyville | TN | — | ◇ UNVERIFIED |
| GSGambone Steel Company, INC. | Eagleville | PA | — | ◇ UNVERIFIED |
| GAGamma Aerospace LLC | Gardena | CA | — | ◇ UNVERIFIED |
| GMGardner Metal Systems, INC. | Cartersville | GA | — | ◇ UNVERIFIED |
| GMGardner Metal Systems, INC. | Acworth | GA | — | ◇ UNVERIFIED |
| GDGardner-watson Decking, INC. | Oldsmar | FL | — | ◇ UNVERIFIED |
| GMGarrett Mirror Support Group LLC | Lexington | NC | — | ◇ UNVERIFIED |
| GMGarzo Manufacturing | Waller | TX | — | ◇ UNVERIFIED |
| GCGaskell Company INC the | Memphis | TN | — | ◇ UNVERIFIED |
| GOGastonia Ornamental Welding, INC. | Mount Holly | NC | — | ◇ UNVERIFIED |
| GIGateco, INC. | Allentown | PA | — | ◇ UNVERIFIED |
| GIGate-it INC | Albuquerque | NM | — | ◇ UNVERIFIED |
| GGGates Galore | Houston | TX | — | ◇ UNVERIFIED |
| GSGate Solutions INC | Washington | UT | — | ◇ UNVERIFIED |
| GCGateway Company-graham | Saint Louis | MO | — | ◇ UNVERIFIED |
| GDGator Dock and Marine | Sanford | FL | — | ◇ UNVERIFIED |
| GMGayle Manufacturing CO INC | Woodland | CA | — | ◇ UNVERIFIED |
| GAGbe Assets, LLC | Kalamazoo | MI | — | ◇ UNVERIFIED |
| GCG & C Auto Body - 054 Tracy | Tracy | CA | — | ◇ UNVERIFIED |
| GMGci Metals, INC. | Dayton | OH | — | ◇ UNVERIFIED |
| GGGeatley Gates and Fabrications, LLC | House Springs | MO | — | ◇ UNVERIFIED |
| GSGecko Steel Truss L.l.c. | Yuma | AZ | — | ◇ UNVERIFIED |
| GMGee Manufacturing INC. | Fowler | CA | — | ◇ UNVERIFIED |
| GFGeismar Fabricators INC | Donaldsonville | LA | — | ◇ UNVERIFIED |
| GEGemco Electronics INC | Gallatin | TN | — | ◇ UNVERIFIED |
| GPGemco Portable Buildings, INC. | Bossier City | LA | — | ◇ UNVERIFIED |
| GEGem Equipment & Mfg | Roanoke | IL | — | ◇ UNVERIFIED |
| GIGem Industries, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| GIGencor Industries INC | Marquette | IA | — | ◇ UNVERIFIED |
| GBGeneral Body Manufacturing | Houston | TX | — | ◇ UNVERIFIED |
| GFGeneral Fabricating Services, LLC | Coraopolis | PA | — | ◇ UNVERIFIED |
| GFGeneral Fabricators, INC | Hillside | NJ | — | ◇ UNVERIFIED |
| GFGeneral Fabricators, INC | Stamford | CT | — | ◇ UNVERIFIED |
| GGGeneral Garage Door Service, INC | Mission | TX | — | ◇ UNVERIFIED |
| GMGeneral Metals Mfg. & Supply CO. | Phoenix | AZ | — | ◇ UNVERIFIED |
| GSGeneral Southern Industries, INC. | Cordova | AL | — | ◇ UNVERIFIED |
| GSGeneral Steel Products | Everett | MA | — | ◇ UNVERIFIED |
| GSGeneral Supply Co., LLC | San Antonio | TX | — | ◇ UNVERIFIED |
| GIGenesis, INC | Roselle | IL | — | ◇ UNVERIFIED |
| GMGenesis Metal CORP | Beggs | OK | — | ◇ UNVERIFIED |
| GSGenzink Steel Supply & Welding Company | Holland | MI | — | ◇ UNVERIFIED |
| GNGeobrugg North America, LLC | Algodones | NM | — | ◇ UNVERIFIED |
| GSGeomembrane Services INC | Kewadin | MI | — | ◇ UNVERIFIED |
| GWGeorge's Welding Services INC. | Medley | FL | — | ◇ UNVERIFIED |
| GMGeorgia Metal Fab | Winder | GA | — | ◇ UNVERIFIED |
| GPGeorgia Pipe & Metal Fabricators, INC. | Valdosta | GA | — | ◇ UNVERIFIED |
| GAGerdau Ameristeel - Jackson Reinforcing | Jackson | TN | — | ◇ UNVERIFIED |
| GAGerdau Ameristeel US INC. | Albany | GA | — | ◇ UNVERIFIED |
| GAGerdau Ameristeel US INC. | Nashville | TN | — | ◇ UNVERIFIED |
| GAGerdau Ameristeel Us, INC. | Farmersville | TX | — | ◇ UNVERIFIED |
