| FIFerro Iron Products | Orange | CA | — | ◇ UNVERIFIED |
| FMFF Manufacturing Incorporated | Albany | OR | — | ◇ UNVERIFIED |
| FLFibracan, LLC | Tucson | AZ | — | ◇ UNVERIFIED |
| FWFielders Welding and Ornamental | Oxford | 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 |
| FIFin-x, INC | Owasso | OK | — | ◇ 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 |
| FIFlexcon Industries | Randolph | MA | — | ◇ UNVERIFIED |
| FLFlexible Lifeline Systems, INC. | Chopin | LA | — | ◇ UNVERIFIED |
| FLF L Heughes & CO INC | Rochester | NY | — | ◇ UNVERIFIED |
| FIFloe International INC | Mcgregor | MN | — | ◇ UNVERIFIED |
| FIFloe International INC - East Building | Mcgregor | MN | — | ◇ UNVERIFIED |
| FMFlorida Metal Craft, INC. | Winter Garden | FL | — | ◇ UNVERIFIED |
| FSFlotation Systems, INC. | Cullman | AL | — | ◇ UNVERIFIED |
| FDFluid Design Products INC | Spokane | WA | — | ◇ UNVERIFIED |
| FCFlux Concepts LLC | Philadelphia | PA | — | ◇ UNVERIFIED |
| FDFlux Design LLC | Portland | OR | — | ◇ UNVERIFIED |
| FWFlying W, INC. | Watonga | OK | — | ◇ UNVERIFIED |
| FLFmc2 LLC | Howell Township | NJ | — | ◇ UNVERIFIED |
| FMF & M Steel Fabricators INC | Vallejo | CA | — | ◇ UNVERIFIED |
| FMF&o Metal Services LLP | Reno | NV | — | ◇ UNVERIFIED |
| FFord-gelatt | Baton Rouge | LA | — | ◇ UNVERIFIED |
| FCForerunner Creations | Brooklyn | NY | — | ◇ UNVERIFIED |
| FOFormed Objects INC | Portland | OR | — | ◇ UNVERIFIED |
| FCFormer Chicago Musical Instruments-remediation Site | Fullerton | CA | — | ◇ UNVERIFIED |
| FAForms and Surfaces | Carpinteria | CA | — | ◇ UNVERIFIED |
| FAForms and Surfaces, INC. | Carpinteria | CA | — | ◇ UNVERIFIED |
 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 |
