| Freight Express Transport Limited | Transport & logistics | 2025 |
| Freight Network Ltd | Transport & logistics | 2008 |
| Freight Xchange Ltd | Transport & logistics | 2025 |
| Freightx International Ltd. | Transport & logistics | 2024 |
| French Law Consultancy Limited | Professional & scientific | 2018 |
| Frensham Homes (Folkestone) Limited | Construction | 2016 |
| Fresh Design & Print Solutions Ltd | Manufacturing | 2008 |
| Fresh Lengths Limited | Professional & scientific | 2016 |
| Fresh Press Ltd | Wholesale & retail | 2025 |
| Freshfable Limited | Hospitality | 2025 |
| Freshstart Pro Clean Ltd | Administrative & support | 2025 |
| Freya Comprehensive Fire Solutions Ltd. | Professional & scientific | 2016 |
| Friars Properties Limited | Real estate | 2024 |
| Fridge Club Ltd | Wholesale & retail | 2025 |
| Fridge UK Limited | Manufacturing | 2008 |
| Friel Control System Services Limited | Professional & scientific | 2016 |
| Friends of the Theatre on the ROW Limited | Arts & recreation | 2021 |
| Friendz Properties Ltd | Real estate | 2020 |
| Frigel (UK) Limited | Wholesale & retail | 2009 |
| Frio-Tech Limited | Construction | 2005 |
| Frogameleon Limited | Information & communication | 1998 |
| Fromnetwork Limited | Information & communication | 2026 |
| Frontline Carpentry Ltd | Construction | 2022 |
| Frontline Courier Limited | Transport & logistics | 2026 |
| Frost Telecomms Ltd | Construction | 2023 |
| Frozen Brothers Investments Limited | Real estate | 2021 |
| Frozen Brothers Limited | Manufacturing | 1945 |
| Frozen Brothers Manufacturing Limited | Administrative & support | 2017 |
| Frutina Limited | Professional & scientific | 1994 |
| FS Digital Limited | Professional & scientific | 2022 |
| FSM Enterprises Ltd | Wholesale & retail | 2022 |
| FSM Solutions Ltd | Financial services | 2025 |
| Fsport Ltd | Wholesale & retail | 2020 |
| Ftstechnologies Limited | Information & communication | 2025 |
| FTW Driving Ltd | Transport & logistics | 2016 |
| Fuel Your Working Day Limited | Hospitality | 2018 |
| Fulcrum Biometrics, Limited | Wholesale & retail | 2020 |
| Full Automation Limited | Professional & scientific | 2022 |
| Full Circle Services Limited | Wholesale & retail | 2003 |
| Full Control Expansion Ltd | Professional & scientific | 2024 |
| Full Flood Productions Ltd | Information & communication | 2017 |
| Full-Funnel CRM Specialists Ltd | Information & communication | 2025 |
| Fulon Limited | Construction | 2016 |
| FUN and Games Limited | Arts & recreation | 2022 |
| FUN4FOUR Ltd | Wholesale & retail | 2022 |
| Functionate Ltd | Health & social care | 2023 |
| Fundamental Home Care Limited | Health & social care | 2024 |
| Fungai Services Limited | Health & social care | 2008 |
| Furner Communications Limited | Administrative & support | 2004 |
| Furniture Industry Research Association(The) | Professional & scientific | 1961 |
| Fuse Franchising Limited | Arts & recreation | 2023 |
| Fusion Stylo Apparel Ltd | Wholesale & retail | 2019 |
| Fusionpcb Limited | Manufacturing | 2025 |
| Future Conditional Limited | Professional & scientific | 2023 |
| Future Mortgages Ltd | Financial services | 2024 |
| Future Perfect Consulting Limited | Other services | 2013 |
| Future-Use Limited | Professional & scientific | 2022 |
| Futuresight Technologies Ltd | Professional & scientific | 2019 |
| Fuzion Electronics Ltd | Wholesale & retail | 2013 |
| FW Healthcare Services Ltd | Education | 2025 |
| FWR Trading Ltd | Wholesale & retail | 2020 |
| Fyeo Portraits Ltd | Professional & scientific | 2019 |
| Fynamics Academy Ltd | Professional & scientific | 2020 |
| Fynor Ltd | Wholesale & retail | 2025 |
| FYP Foods Limited | Hospitality | 2025 |
| FZ Plumbing and Heating Ltd | Construction | 2024 |
| FZH Limited | Real estate | 2022 |
| G & D Plastering Limited | Construction | 2015 |
| G & N Electrical Systems Limited | Administrative & support | 2014 |
| G & S Design Services Ltd | Administrative & support | 2009 |
| G C Jones Construction Company Limited | Construction | 2002 |
| G D Laser Limited | Information & communication | 2001 |
| G D T ( Fire Extinguishers) Limited | Wholesale & retail | 1996 |
| G Fryer Light Engineering Limited | Professional & scientific | 2021 |
| G N Physio Ltd. | Other services | 2015 |
| G P Wilkinson Limited | Construction | 2003 |
| G Star Construction Limited | Construction | 2021 |
| G W Astra Plastering Limited | Construction | 2025 |
| G&G Care Services Ltd | Health & social care | 2024 |
| G&G Hayes Ltd | Real estate | 2025 |
| G&H Corporation Limited | Professional & scientific | 2025 |
| G. and S. Accountants Limited | Professional & scientific | 2005 |
| G. COX Lift Engineers Ltd | Manufacturing | 2007 |
| G.F.D Carpentry Ltd | Manufacturing | 2022 |
| G.M.Site Ltd | Construction | 2018 |
| G.O.A.T Building Services Limited | Professional & scientific | 2022 |
| G.U.C. Limited | Education | 1995 |
| G51 Merchandise Limited | Wholesale & retail | 2024 |
| G8 Building Ltd | Construction | 2006 |
| Gadgets Galaxy Ltd | Wholesale & retail | 2016 |
| Gadhvi 1515 Holdings Ltd | Financial services | 2024 |
| Gadwey Properties Limited | Real estate | 1964 |
| Gaia HR Consultancy Limited | Administrative & support | 2010 |
| Gailoblay Ltd | Information & communication | 2023 |
| GAK Associates Limited | Professional & scientific | 1995 |
| Galaxy Marquees Ltd | Administrative & support | 2021 |
| Gallus Trail Ltd | Wholesale & retail | 2023 |
| Game Changer Productions Ltd | Information & communication | 2025 |
| GAN Management Ltd | Administrative & support | 2017 |
| Garage Doors (Central) Limited | Wholesale & retail | 2013 |