| Forge Dental Laboratory Ltd | Health & social care | 2017 |
| Forged Ltd | Manufacturing | 2008 |
| Forgotten Heritage Limited | Professional & scientific | 2016 |
| Formigal Projects Limited | Extraterritorial | 2018 |
| Forrest Motorsport Ltd | Manufacturing | 2024 |
| Fortis GC Limited | Professional & scientific | 2014 |
| Fortis GC Property Limited | Real estate | 2019 |
| Fortuin Holdings Ltd | Financial services | 2026 |
| Fortunis Limited | Real estate | 2024 |
| Foundry House (Hungerford) Management Company Limited | Households | 1993 |
| Four Corners Care Limited | Health & social care | 2021 |
| Four Counties 4X4 Limited | Wholesale & retail | 2017 |
| Four Spires Limited | Real estate | 2022 |
| FOUR4 Social Ltd | Information & communication | 2024 |
| Fourman Dock Limited | Wholesale & retail | 2017 |
| Fourway Electronics Limited | Manufacturing | 1999 |
| Fox's Consulting Limited | Professional & scientific | 2012 |
| Foxes Tree Services & SON Ltd | Administrative & support | 2014 |
| Foxsmart Services Ltd | Professional & scientific | 2022 |
| FPK Telecom Ltd | Information & communication | 2016 |
| FPL (Harwell North) Ltd | Construction | 2020 |
| Fractile Ltd | Information & communication | 2022 |
| Fragrance Foundation United Kingdom | Other services | 1998 |
| Franklin Bates Investments Limited | Real estate | 2016 |
| Franklin Bates Limited | Administrative & support | 2013 |
| Franklin France and Company Limited | Wholesale & retail | 1999 |
| Frayling Management Ltd | Financial services | 2022 |
| Fredericks Foundation | Professional & scientific | 2000 |
| Free Green Electricity Corporation Limited | Construction | 2010 |
| Free Soda Limited | Professional & scientific | 2020 |
| Freelanceuk.Com Ltd | Administrative & support | 2017 |
| Freeranger Property Limited | Real estate | 2009 |
| Freesol Fitness Limited | Arts & recreation | 2021 |
| Freestyle Sign & Print Company Limited | Administrative & support | 2000 |
| Freixenet Copestick Limited | Wholesale & retail | 2005 |
| French & French Limited | Real estate | 1994 |
| French-Brooks Interiors Limited | Administrative & support | 2007 |
| Fresh Build Berkshire Ltd | Construction | 2024 |
| Fresh Oyster Consulting Limited | Information & communication | 2016 |
| Freshers Fair Limited | Professional & scientific | 2000 |
| Friary Motors Limited | Extraterritorial | 2011 |
| Friendly Vets Limited | Professional & scientific | 2007 |
| Friends of Hope for Africa Missions | Other services | 2004 |
| Fringoo Group Ltd. | Wholesale & retail | 2013 |
| Fruit Machine Smoothies Limited | Wholesale & retail | 2025 |
| FRY Consulting Limited | Information & communication | 2019 |
| Fulmar Limited | Construction | 2018 |
| Funkasm Limited | Administrative & support | 2012 |
| Fussy Holdings Ltd | Real estate | 2024 |
| Future Design Foundation Limited | Professional & scientific | 2015 |
| Future Energy Services Ltd | Construction | 2021 |
| Future Safe Properties Ltd | Real estate | 2024 |
| Futures for Women | Health & social care | 1879 |
| Futuresense Foundation | Health & social care | 2009 |
| Fxpipsclub Ltd | Financial services | 2024 |
| Fyfe & Mcgrouther Limited | Extraterritorial | 1982 |
| FYM Repair Ltd | Wholesale & retail | 2022 |
| G & P Computing Limited | Professional & scientific | 2005 |
| G & T Bar + Catering Limited | Hospitality | 2023 |
| G & T Creative Limited | Information & communication | 2015 |
| G H Process Engineering Limited | Professional & scientific | 2004 |
| G L Freight Services Limited | | 1985 |
| G Maslin HR Limited | Administrative & support | 2025 |
| G S Pickett Family Butchers Limited | Wholesale & retail | 2000 |
| G Tech G Construction Ltd | Construction | 2020 |
| G&E Holdings Ltd | Transport & logistics | 2024 |
| G&F Show Jumpers Limited | Agriculture & fishing | 2025 |
| G. a. Butler & Sons Limited | Agriculture & fishing | 2003 |
| G.F.I Ltd | Professional & scientific | 2026 |
| G.W.S.A. Carpentry Limited | Construction | 2007 |
| G2 Enterprises Limited | Information & communication | 2013 |
| G2 Field Marketing Ltd | Professional & scientific | 2013 |
| Gabriels Group Ltd | Administrative & support | 2025 |
| Gadbourne Services (Newbury) Ltd | Construction | 2021 |
| Gainz Farm Limited | Wholesale & retail | 2017 |
| Gaitq Limited | Professional & scientific | 2019 |
| GAL Chauffeurs LLP | | 2023 |
| Gallagher Building and Carpentry Limited | Construction | 2026 |
| Gamblewear Ltd | Wholesale & retail | 2023 |
| Garcia Creative Design Ltd | Professional & scientific | 2023 |
| Garden Doctor Landscaping Ltd | Administrative & support | 2025 |
| Garden HUT Storage Limited | Other services | 2001 |
| Gardening in London Limited | Administrative & support | 2007 |
| Gardenistic Limited | Administrative & support | 2014 |
| Gardenlink Group Limited | Financial services | 2023 |
| Gardenlink Limited | Administrative & support | 2001 |
| Gardens by James Dean Ltd | Wholesale & retail | 2008 |
| Gardiner Ventures Limited | Professional & scientific | 2016 |
| Gardner Leader LLP | | 2008 |
| Gardner Leader Trust Corporation Limited | Professional & scientific | 2026 |
| Gardner Mechanical Services Limited | Construction | 1992 |
| Garford Consulting Limited | Information & communication | 2019 |
| Garner Osborne Circuits Limited | Manufacturing | 1999 |
| Gate Consulting Limited | Information & communication | 2014 |
| Gateway Active Ltd | Information & communication | 2019 |
| Gavels Auctioneers & Valuers Limited | Professional & scientific | 2010 |
| Gazkaz Promotional Wear Limited | Manufacturing | 2003 |
| GBLL1 Investments Ltd | Real estate | 2017 |
| GDN House Ltd | Financial services | 2020 |
| GDN House Propco Ltd | Real estate | 2020 |