| 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 |
| FCF & C Professional Aluminum Railing CORP. | Plainfield | NJ | — | ◇ 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 |
| FMFelps Manufacturing Corporation | Johnson City | TX | — | ◇ UNVERIFIED |
| FMFence Menders | Santa Ana | CA | — | ◇ UNVERIFIED |
| FMFence Menders INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| FPFence Pros | Santa Ana | CA | — | ◇ UNVERIFIED |
| FFFenceTrac Fence Systems, Inc. | Jenks | OK | — | ◇ UNVERIFIED |
| FSFenix Storefront & Signs LLC | Corona | NY | — | ◇ UNVERIFIED |
| FFFerguson Fabrication LLC | Merlin | OR | — | ◇ UNVERIFIED |
| FMFerguson Manufacturing Company | Suffolk | VA | — | ◇ UNVERIFIED |
| FIFerrofab INC. | Hamlet | NC | — | ◇ UNVERIFIED |
| FIFerro Iron Products | Orange | CA | — | ◇ UNVERIFIED |
| FMFF Manufacturing Incorporated | Albany | OR | — | ◇ UNVERIFIED |
| FLFibracan, LLC | Tucson | AZ | — | ◇ UNVERIFIED |
| FWFielders Welding and Ornamental | Oxford | MS | — | ◇ UNVERIFIED |
| FPField Pro Equipment Manufacturing LLC | Columbus | MS | — | ◇ UNVERIFIED |
| FMFife Metal Fabricating INC | Redding | CA | — | ◇ UNVERIFIED |
| FHFine Home Details, INC. | Providence | RI | — | ◇ 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 |
| FFFireball Fab and Metal Sales LLC | Little Canada | MN | — | ◇ 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 |
| FLFisher & Ludlow INC | Litchfield | IL | — | ◇ 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 |
| FIFlaherty Iron Works, INC. | Alexandria | VA | — | ◇ UNVERIFIED |
| FOFlannery of California | San Fernando | CA | — | ◇ UNVERIFIED |
| FBFlashing By Design, Inc | North Branch | MN | — | ◇ UNVERIFIED |
| FLFlexible Lifeline Systems, INC. | Chopin | LA | — | ◇ UNVERIFIED |
| FLFlexLine LLC | San Jose | CA | — | ◇ UNVERIFIED |
| FLF L Heughes & CO INC | Rochester | NY | — | ◇ UNVERIFIED |
| FWFlicks Welding | Abbyville | KS | — | ◇ UNVERIFIED |
| FIFloe International INC | Mcgregor | MN | — | ◇ UNVERIFIED |
| FIFloe International INC - East Building | Mcgregor | MN | — | ◇ UNVERIFIED |
