| Freebies Ltd | Administrative & support | 2017 |
| Freedom View Management Limited | Households | 2004 |
| Freeman Financial Partners Ltd | Financial services | 2024 |
| Freeman Price Services Ltd | Administrative & support | 2023 |
| Freeman Property Services Ltd | Real estate | 2025 |
| Freerack Ltd | Transport & logistics | 2017 |
| Freespirit (Holdings) Limited | Professional & scientific | 2009 |
| Freestyle Graphics Ltd | Manufacturing | 2014 |
| French Gardens Ltd | Households | 2005 |
| Freyr Health Ltd | Information & communication | 2025 |
| Friday Club 81 Ltd | Wholesale & retail | 2024 |
| Friedheim International Limited | Wholesale & retail | 1913 |
| Friedheim Trustees Limited | Other services | 2023 |
| Friendship Network Group Ltd | Administrative & support | 2021 |
| Frits & Sons Ltd | Construction | 2022 |
| From Skrrrch Limited | Wholesale & retail | 2025 |
| Front-End-App-Development Limited | Information & communication | 2022 |
| Frost Fang Ltd | Information & communication | 2012 |
| Frosty Service Ltd | Wholesale & retail | 2017 |
| Frostypig Limited | Other services | 2009 |
| Frux Trade Limited | Wholesale & retail | 2008 |
| FSK Ltd | Transport & logistics | 2026 |
| FTJ Interiors Ltd | Construction | 2021 |
| FTK Holdings Limited | Financial services | 2021 |
| FTT Solutions Limited | Information & communication | 2018 |
| Fuel Included Limited | Construction | 2014 |
| Fuhry Management Limited | Professional & scientific | 2024 |
| Full on Marketing Limited | Administrative & support | 2001 |
| Fullbrook Systems Limited | Wholesale & retail | 1982 |
| Fuller Strategic Developments Ltd | Construction | 2026 |
| Fun-Damental Consulting Ltd | Professional & scientific | 2018 |
| Functional Fungi Ltd | Agriculture & fishing | 2023 |
| Funklad Services Limited | Professional & scientific | 2016 |
| Furnell Transport Limited | Professional & scientific | 1991 |
| Furnitureistic Ltd | Manufacturing | 2022 |
| Fusion Flames Ltd | Hospitality | 2025 |
| Fusion Glazing Systems Ltd | Financial services | 2025 |
| Fusion Mews Management Company Limited | Households | 2005 |
| Fusion&Rootsfoods Ltd | Hospitality | 2026 |
| Future Champs Boxing Ltd | Arts & recreation | 2025 |
| Future Climate Ltd | Construction | 2025 |
| Future Engineering Solutions Limited | Manufacturing | 2017 |
| Future Shapers Limited | Professional & scientific | 2006 |
| Futuro Resources Ltd | Professional & scientific | 2025 |
| Fuxin Express(Uk) International Limited | Transport & logistics | 2016 |
| Fuze Electrical Ltd | Construction | 2022 |
| FW Lettings (Holdings) Limited | Financial services | 2024 |
| FW Lettings Limited | Real estate | 2012 |
| Fwecom Futures Limited | Financial services | 2012 |
| Fwecom Properties Limited | Real estate | 2020 |
| Fyco Limited | Other services | 2018 |
| Fym.Creative Ltd | Professional & scientific | 2026 |
| FYR Ltd | Information & communication | 2018 |
| G - JAN Computers Limited | Information & communication | 1983 |
| G Frimley Limited | Wholesale & retail | 2018 |
| G Hall Builders Limited | Construction | 2010 |
| G Marsh Consultants Ltd | Construction | 2011 |
| G Petrescu Ltd | Extraterritorial | 2015 |
| G T K Systems Ltd | Information & communication | 2005 |
| G&D Electrical Ltd | Construction | 2020 |
| G&M Fitting Ltd | Construction | 2022 |
| G&Y Logistic Limited | Transport & logistics | 2014 |
| G. Jakeman Limited | Professional & scientific | 2004 |
| G. Rasimi HCW Ltd | Other services | 2017 |
| G.& E.Automatic Equipment Limited | Wholesale & retail | 1969 |
| G.B. Kent & Sons PLC | Manufacturing | 1900 |
| G.C.S. Property Management Limited | Real estate | 1995 |
| G.G.T. Building Service Limited | Construction | 2016 |
| G.T Transportations Ltd | Transport & logistics | 2022 |
| G2TV Limited | Information & communication | 2011 |
| Gaba Labs (Research) Ltd | Manufacturing | 2016 |
| Gaba Labs Ltd | Manufacturing | 2016 |
| Gabiano (UK) Ltd | Wholesale & retail | 2022 |
| Gabriel Andreea Limited | Wholesale & retail | 2023 |
| Gaddesden Industries Limited | Wholesale & retail | 2024 |
| Gaddesden Place RDA Centre | Arts & recreation | 2011 |
| Gaddesden Sporting Club Limited | Arts & recreation | 2024 |
| Gadebridge Bedding and Furniture Limited | Wholesale & retail | 1983 |
| Gadebridge Harun Cafe Limited | Hospitality | 2019 |
| Gafas Trading Ltd | Wholesale & retail | 2022 |
| Gage Group Global Ltd | Financial services | 2021 |
| Gage Property Ltd | Real estate | 2019 |
| Gainclarity Ltd | Professional & scientific | 2023 |
| Galaxy Developments Limited | Professional & scientific | 1985 |
| Galileo Property Investments Ltd | Real estate | 2013 |
| Gallant Maintenance Services Limited | Agriculture & fishing | 2018 |
| Galley Property Ltd | Real estate | 2023 |
| Gama Healthcare Corporation Limited | Manufacturing | 2017 |
| Gama Healthcare Ltd | Health & social care | 2004 |
| Gama Property Corporation Limited | Real estate | 2018 |
| Gamedog Gear Limited | Wholesale & retail | 2025 |
| Ganievex Solutions Ltd | Information & communication | 2026 |
| Garadice Developments Ltd | Construction | 2020 |
| Garden Private Holdings Limited | Financial services | 2017 |
| Garden Retreat UK Limited | Wholesale & retail | 2014 |
| Gardener Property Management LLP | | 2010 |
| Gardiners Park Village (Basildon) Management Company Limited | Households | 2017 |
| Garner Reidy Property Ltd | Real estate | 2024 |
| Garton Holdings Limited | Financial services | 2003 |
| Garuda Capital Limited | Financial services | 2026 |