| Fieldway 2 Limited | Real estate | 2022 |
| Fieldway 3 Limited | Real estate | 2022 |
| Fieldway 4 Limited | Real estate | 2022 |
| Filomax Limited | Real estate | 2017 |
| Financial Literacy Education CIC | Education | 2024 |
| Fire Suppression Solutions Limited | Professional & scientific | 2015 |
| Firesec Compliance Limited | Professional & scientific | 2008 |
| Fireward Limited | Wholesale & retail | 2010 |
| First Choice Transport Group Limited | Financial services | 2018 |
| First Choice Transport London Ltd | Transport & logistics | 2018 |
| First Choice Tuition Ltd | Education | 2023 |
| First Habitation Lettings Ltd | Real estate | 2020 |
| First Habitation Limited | Real estate | 2012 |
| Fishers Stainless Fabrications Ltd. | Manufacturing | 2003 |
| FIT4CARE UK Ltd | Administrative & support | 2020 |
| Fix'A Gaff Ltd | Construction | 2026 |
| FJA Plumbing & Heating Limited | Construction | 2021 |
| FJK Holdings Limited | Real estate | 2023 |
| Flare & Forge Limited | Administrative & support | 2025 |
| Flatts Investments Ltd | Financial services | 2022 |
| Fleetwise Services Ltd | Education | 2020 |
| Fletton Quays Hotel Operations Limited | Hospitality | 2021 |
| Fontessa Limited | Extraterritorial | 1959 |
| Footings & Floors Concrete Finishing Ltd | Administrative & support | 2019 |
| Footings & Floors Properties Limited | Real estate | 2019 |
| Footings and Floors Limited | Construction | 2012 |
| FOR the Bride Publishing Limited | Extraterritorial | 1999 |
| Forever Held CIC | Health & social care | 2026 |
| Forrester Hughes Limited | Construction | 2018 |
| Fortis Trident Limited | Administrative & support | 2019 |
| Fortis Vision Limited | Administrative & support | 2018 |
| Fortis Windrose Holdings Limited | Financial services | 2024 |
| Fortisman Consultancy Limited | Financial services | 2017 |
| Fortisman Investments Limited | Real estate | 2026 |
| Fortuna EX Saporibus UK Limited | Manufacturing | 2026 |
| Foundation Creative Limited | Professional & scientific | 2013 |
| Foundry Bedford Ltd | Arts & recreation | 2026 |
| Fountain Properties (Essex) Limited | Administrative & support | 2011 |
| Four FS Consulting Ltd | Professional & scientific | 2023 |
| FOX Fire Services Ltd | Construction | 2022 |
| Foxbeck Limited | Real estate | 2024 |
| Foxbeck Properties (EA) Ltd | Real estate | 2024 |
| Foxbeck Properties (Tendering) Ltd | Real estate | 2011 |
| Foxbeck Properties Limited | Real estate | 2022 |
| Foxbeck Properties Norfolk Ltd | Financial services | 2024 |
| Francesca Dulake Limited | Manufacturing | 2024 |
| Freebournes Properties Limited | Construction | 1985 |
| Frequencia Ltd | Manufacturing | 2010 |
| Fresh PUB Company Limited | Administrative & support | 2017 |
| Friday Direct Ltd | Information & communication | 2022 |
| Friends of Witham ST. John CIC | Health & social care | 2022 |
| Fringewood Holdings Ltd | Financial services | 2026 |
| Fringewood Investments Ltd | Financial services | 2026 |
| Frinton Property Company Limited | Real estate | 2024 |
| Futures Essex Ltd | Education | 2024 |
| G & G Designs (London) Limited | Professional & scientific | 2016 |
| G & T Health and Safety Group Limited | Administrative & support | 2018 |
| G Collins and Sons Funeral Directors Limited | Other services | 2008 |
| G H Sons Limited | Financial services | 2020 |
| G J Mariner and SON Limited | Construction | 2004 |
| G L Underwood Consulting Ltd | Professional & scientific | 2022 |
| G M Health and Safety Limited | Administrative & support | 2024 |
| G S Howard Transport Ltd | Transport & logistics | 2018 |
| G Underwood Consulting Limited | Professional & scientific | 2015 |
| G W Hardy & SON Limited | Other services | 2012 |
| G2S Windows & Cleaning Limited | Administrative & support | 2018 |
| Gadgetclub UK Ltd | Wholesale & retail | 2022 |
| Galaxy Publications Limited | Extraterritorial | 1966 |
| GARDENMAN993 Ltd | Administrative & support | 2022 |
| Garlands Estates Ltd | Real estate | 2019 |
| Gatekeeper Technology Limited | Information & communication | 1998 |
| Gateson Scaffolding Ltd | Construction | 2025 |
| GC Bishop Ltd | Administrative & support | 2020 |
| GD Safety Inspections Ltd | Professional & scientific | 2025 |
| Gdib Ltd | Professional & scientific | 2015 |
| Geedon Construction Services Ltd | Construction | 2010 |
| GEM Solutions Recruitment Ltd | Administrative & support | 2026 |
| Gemini Building Maintenance Ltd | Construction | 2018 |
| General Business Holdings Limited | Other services | 1991 |
| General Finance Services Limited | Construction | 1982 |
| Geoassets Ltd | Professional & scientific | 2020 |
| Geoteam Geomatics Limited | Transport & logistics | 2024 |
| Gibanlufe Finance Limited | Administrative & support | 2019 |
| Gift Sent Ltd | Manufacturing | 2025 |
| Gipson Landscapes Limited | Construction | 2021 |
| Gittgo Ltd | Information & communication | 2020 |
| GKS Graphics Ltd | Professional & scientific | 2022 |
| Gladman Limited | Real estate | 2016 |
| Glasgow Internet Services Limited | Professional & scientific | 1995 |
| GLB Maintenance Services Ltd | Other services | 2019 |
| Global AD Ventures Ltd | Administrative & support | 2020 |
| Global Diligence Solutions Ltd | Professional & scientific | 2014 |
| Global ECM Solutions Ltd | Information & communication | 2010 |
| Global Fashion Ltd | Wholesale & retail | 2012 |
| Global Fulfilment Group Limited | Financial services | 2022 |
| Global Projects Ltd | Financial services | 2003 |
| Globalgrade Healthcare Ltd. | Health & social care | 2018 |
| Globalramzan Ltd | Wholesale & retail | 2025 |
| Gloucestershire Internet Services Limited | Professional & scientific | 1995 |
| Glovers Motors Limited | Wholesale & retail | 2018 |