| FMFlorida Metal Craft, INC. | Winter Garden | FL | — | ◇ UNVERIFIED |
| FSFlotation Systems, INC. | Cullman | AL | — | ◇ UNVERIFIED |
| FCFlux Concepts LLC | Philadelphia | PA | — | ◇ UNVERIFIED |
| FDFlux Design LLC | Portland | OR | — | ◇ 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 |
| 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 |
| FMFrank Morrow Company | Providence | RI | — | ◇ 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 |
| FEFresno Equipment CO | Fresno | CA | — | ◇ UNVERIFIED |
| FFFresno Fab Tech INC | Sanger | CA | — | ◇ UNVERIFIED |
| FCFriedrichs Custom Manufacturing, INC | Jefferson | LA | — | ◇ UNVERIFIED |
| FAFritz Air, LLC | Torrington | CT | — | ◇ UNVERIFIED |
| FAFritz Aluminum Services, INC | Eustis | FL | — | ◇ 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 | 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 |
| FCFull Circle Enterprise, INC | Phoenix | AZ | — | ◇ UNVERIFIED |
| FEFulton Equipment | Toledo | OH | — | ◇ UNVERIFIED |
| FCFunder Custom INC | Enoch | UT | — | ◇ UNVERIFIED |
| FPFusion Plastics | Lennox | SD | — | ◇ UNVERIFIED |
| FTFusion Targets, LLC | Orem | UT | — | ◇ UNVERIFIED |
| FLFuturegenx L.l.c. | Boise | ID | — | ◇ UNVERIFIED |
