| FTFab Tech Manufacturing INC | Redmond | OR | — | ◇ UNVERIFIED |
| FTFab Tech Manufacturing INC | Prineville | OR | — | ◇ UNVERIFIED |
| FMFabtek Manufacturing, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| FCFabtron Corporation | Auburn | IN | — | ◇ UNVERIFIED |
| FMFabwest Manufacturing | Temecula | CA | — | ◇ UNVERIFIED |
| FFFab-worx Fabricators, LLC | Port Allen | LA | — | ◇ UNVERIFIED |
| FSFahrenheit Services Air Conditioning & Refrigeration inc | Miami | FL | — | ◇ UNVERIFIED |
| FSFairfield Steel Works LLC | Shelton | CT | — | ◇ UNVERIFIED |
| FSFalcon Steel Company | Fort Worth | TX | — | ◇ UNVERIFIED |
| FMFannco Metal Buildings & Components | Clovis | CA | — | ◇ UNVERIFIED |
| FSFarwest Steel Post Tensioning Company | Portland | OR | — | ◇ UNVERIFIED |
| FIFastest INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| FIFastest INC | Roseville | MN | — | ◇ UNVERIFIED |
| FLFast Lane Processing & Fabrication LLC | Milliken | CO | — | ◇ UNVERIFIED |
| FTFast Truss Connection | Miami | FL | — | ◇ UNVERIFIED |
| FAFathom and Form, LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| FIFcf INC | Shreveport | LA | — | ◇ UNVERIFIED |
| FLFe26 LLC | Gastonia | NC | — | ◇ UNVERIFIED |
| FMFederal Metals, INC | Tulsa | OK | — | ◇ UNVERIFIED |
| FSFederal Steel & Erection CO | East Alton | IL | — | ◇ UNVERIFIED |
| FWFeese Welding & Iron | Liberal | KS | — | ◇ UNVERIFIED |
| FIFehrs Industrial Manufacturing INC. | Seminole | TX | — | ◇ UNVERIFIED |
| FBFelker Brothers CORP | Plover | WI | — | ◇ UNVERIFIED |
| FSFenix Storefront & Signs LLC | Corona | NY | — | ◇ UNVERIFIED |
| FFFergerson Fire and Fabrication 1767 | Pflugerville | TX | — | ◇ UNVERIFIED |
| FEFerguson Enterprises LLC #2778 | South Holland | IL | — | ◇ UNVERIFIED |
| FFFerguson Fire and Fabrication 1760 | Chicopee | MA | — | ◇ UNVERIFIED |
| FFFerguson Fire & Fabrication Facility 0728 | Houston | TX | — | ◇ UNVERIFIED |
| FFFerguson Fire & Fabrication (facility 2567) | Guntersville | AL | — | ◇ UNVERIFIED |
| FFFerguson Fire & Fabrication INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| FFFerguson Fire - Fabrication INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| FBFerraro Bros INC | Maspeth | NY | — | ◇ UNVERIFIED |
| FIFerrofab INC. | Hamlet | NC | — | ◇ UNVERIFIED |
| FLFibracan, LLC | Tucson | AZ | — | ◇ UNVERIFIED |
| FFFick Foundry Company | Tacoma | WA | — | ◇ UNVERIFIED |
| FMFife Metal Fabricating INC | Redding | CA | — | ◇ UNVERIFIED |
| FFFine-Line Fabrications, LLC | Oostburg | WI | — | ◇ UNVERIFIED |
| FFFine-Line Fabrications, LLC | Oostburg | WI | — | ◇ UNVERIFIED |
| FFFine-Line Fabrications, LLC | Oostburg | WI | — | ◇ UNVERIFIED |
| FLFinish Line Powder Coating | Yakima | WA | — | ◇ UNVERIFIED |
| FSFinkles Studio | Rockport | TX | — | ◇ UNVERIFIED |
| FSFino's Screen & Aluminum Company | Port Saint Lucie | FL | — | ◇ UNVERIFIED |
| FIFin-x, INC | Owasso | OK | — | ◇ UNVERIFIED |
 Fireblast Global INC Dba Fireblast 451 INC | Murrieta | CA | — | ◇ UNVERIFIED |
| FFFireside Fabrication LLC | Thomson | GA | — | ◇ UNVERIFIED |
| FRFirst Rate Industries, LTD | Saint Marys | OH | — | ◇ UNVERIFIED |
| FSFirst Source Fabricating, Inc. | Cincinnati | OH | — | ◇ UNVERIFIED |
| FSFischer Steel CORP | Memphis | TN | — | ◇ UNVERIFIED |
| FMFisher Metal Products INC | Visalia | CA | — | ◇ UNVERIFIED |
| FMFixture Manufacturing Corp-winner Road | Kansas City | MO | — | ◇ UNVERIFIED |
| FFF-k Fab Group, LLC | Belle Chasse | LA | — | ◇ UNVERIFIED |
| FFFlare Fittings INC | Kalamazoo | MI | — | ◇ UNVERIFIED |
| FBFlashing By Design, Inc | North Branch | MN | — | ◇ UNVERIFIED |
| FTFlatlands Threading Co. Inc. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| FTFlatlands Threading Company, INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| FIFlexcon Industries | Randolph | MA | — | ◇ UNVERIFIED |
| FLFlexible Lifeline Systems, INC. | Chopin | LA | — | ◇ UNVERIFIED |
| FLF L Heughes & CO INC | Rochester | NY | — | ◇ UNVERIFIED |
| FDFlo Dor Manufacturing | Pittsburg | CA | — | ◇ UNVERIFIED |
| FCFlorida Computerized Machining, INC. | Odessa | FL | — | ◇ UNVERIFIED |
| FMFlorida Metal Craft, INC. | Winter Garden | FL | — | ◇ UNVERIFIED |
| FSFlotation Systems, INC. | Cullman | AL | — | ◇ UNVERIFIED |
| FCFlour City Bending INC | Big Lake | MN | — | ◇ UNVERIFIED |
| FCFlour City Bending INC | Becker | MN | — | ◇ UNVERIFIED |
| FIFlowrox, INC. | Linthicum | MD | — | ◇ UNVERIFIED |
| FCFlowserve Corporation Automatic Control Valves and Sub-component Manufacturer | Springville | UT | — | ◇ UNVERIFIED |
| FDFluid Design Products INC | Spokane | WA | — | ◇ UNVERIFIED |
| FWFlying W, INC. | Watonga | OK | — | ◇ UNVERIFIED |
| FLFmc2 LLC | Howell Township | NJ | — | ◇ UNVERIFIED |
| FMF & M Steel Fabricators INC | Vallejo | CA | — | ◇ UNVERIFIED |
| FTFontaine Trailer Company | Princeton | KY | — | ◇ UNVERIFIED |
| FFord-gelatt | Baton Rouge | LA | — | ◇ 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 |
| FEForum Energy Technologies | Midland | TX | — | ◇ UNVERIFIED |
| FEForum Energy Technologies | Guthrie | OK | — | ◇ UNVERIFIED |
| FEForum Energy Technologies | Robstown | TX | — | ◇ 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 |
| FFFrancom Fabrication, LLC | Blanding | UT | — | ◇ UNVERIFIED |
| FIFrankenmuth Industrial Services | Frankenmuth | MI | — | ◇ UNVERIFIED |
| FVFranklin Valve, LP | Houston | TX | — | ◇ UNVERIFIED |
| FPFrank Pattern & Manufacturing | Modesto | CA | — | ◇ UNVERIFIED |
| FCFrank's Custom Stainless | Pittsburgh | PA | — | ◇ 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 |
| FPFresno Pipe & Supply, INC | Fresno | CA | — | ◇ UNVERIFIED |
| FCFriedrichs Custom Manufacturing, INC | Jefferson | LA | — | ◇ UNVERIFIED |
| FAFritz Air, LLC | Torrington | CT | — | ◇ UNVERIFIED |
| FMFrontier Manufacturing Company | Trenton | TX | — | ◇ UNVERIFIED |
| FRFront Range Steel INC | Fort Collins | CO | — | ◇ UNVERIFIED |
| FIFsr, INC. | Little Falls | NJ | — | ◇ UNVERIFIED |
| FEFulton Equipment | Toledo | OH | — | ◇ UNVERIFIED |
