| Fine Art Exchange Ltd | Wholesale & retail | 2016 |
| Fire and Safety Systems Ltd | Professional & scientific | 2012 |
| Fire Safety Support Ltd | Public administration | 2026 |
| Firebrand Communications Limited | Professional & scientific | 2025 |
| First Choice Design and Build Ltd | Construction | 2020 |
| First Circle Computers Limited | Information & communication | 1993 |
| First Sports International Ltd | Information & communication | 1998 |
| Firstpoint Consultancy Ltd | Professional & scientific | 2020 |
| Fisher Competitions Ltd | Other services | 2025 |
| Fit and Healthy Life Ltd | Education | 2015 |
| Fit Food Delivery Ltd | Hospitality | 2019 |
| Fitter Family Ltd | Arts & recreation | 2020 |
| Five Points Consulting Limited | Information & communication | 2023 |
| Five Star Nails (Wraysbury) Ltd. | Other services | 2013 |
| FIX Circuit Ltd | Wholesale & retail | 2026 |
| Flaire Group Ltd | Manufacturing | 2024 |
| Fldj Limited | Information & communication | 2017 |
| Fleetperks Ltd | Professional & scientific | 2020 |
| Flip Organics Ltd | Manufacturing | 2021 |
| Flo-Heat Ltd | Construction | 2024 |
| Florida Court (Staines) Management Company Limited | Households | 1994 |
| Fltf Academy Group Limited | Arts & recreation | 2025 |
| Flybarakah Travels Ltd | Manufacturing | 2019 |
| Flying Couriers Limited | Transport & logistics | 2016 |
| FM Smile Ltd | Wholesale & retail | 2023 |
| FMI Trans Limited | Transport & logistics | 2024 |
| FN Global Meat UK Limited | Wholesale & retail | 2016 |
| Food Compliance Partners Ltd | Professional & scientific | 2025 |
| Food Heights Limited | Hospitality | 2022 |
| Foram Enterprise Limited | Wholesale & retail | 2014 |
| Foram Properties Ltd | Real estate | 2018 |
| Foresale Ltd | Wholesale & retail | 2024 |
| Formosa Asset Management Ltd | Professional & scientific | 2024 |
| Forrest Fabrications Limited | Manufacturing | 2020 |
| Forrest Industrial Limited | Transport & logistics | 2014 |
| Fortis Health & Longevity Ltd | Health & social care | 2023 |
| Fortune Realty Limited | Real estate | 2018 |
| Forty-Eight Gresham Ltd | Households | 2006 |
| Foster Mechanics UK Ltd | Administrative & support | 2021 |
| Francesca's Cakes Ltd | Wholesale & retail | 2020 |
| Franco Heat Pumps Ltd | Manufacturing | 2025 |
| Freddie Cottrell Welding Limited | Manufacturing | 2024 |
| Fredellen Ltd | Real estate | 2005 |
| Fresh Image Training Ltd | Arts & recreation | 2015 |
| Freya Noble Melispa Nails Beauty Ltd | Other services | 2024 |
| Front Edge Ltd | Manufacturing | 2022 |
| Frostbite Audio Events Ltd | Arts & recreation | 2025 |
| Frosty Food Factory Ltd | Manufacturing | 2025 |
| Frozen to Fork Ltd | Hospitality | 2025 |
| Fruitful Team Events Limited | Administrative & support | 2018 |
| FU CHA UK Trading Ltd | Hospitality | 2024 |
| Full House Restaurants Holdings Limited | Hospitality | 2014 |
| Full House Restaurants Limited | Hospitality | 1997 |
| Fully Furnished Limited | Wholesale & retail | 2000 |
| FUN Club Blue England Ltd | Arts & recreation | 2020 |
| Funky Consulting Limited | Information & communication | 2023 |
| Fusionshop Limited | Wholesale & retail | 2024 |
| Future Champs Coaching Ltd | Education | 2025 |
| Future Design Landscaping Ltd | Administrative & support | 2018 |
| Future Value Consultants Limited | Administrative & support | 1998 |
| Futurepath Overseas Limited | Education | 2026 |
| FWX Limited | Transport & logistics | 2018 |
| G & M Partnership Limited | Transport & logistics | 2020 |
| G Bird Electrical Limited | Manufacturing | 2021 |
| G Hawks Ltd | Other services | 2021 |
| G Molloy Plumbing and Heating Limited | Construction | 2021 |
| G N Enterprises Limited | Administrative & support | 2006 |
| G S Scaffolding Ltd | Construction | 2020 |
| G&V Homes UK Ltd | Real estate | 2019 |
| G-Force Plumbing and Heating Ltd | Construction | 2020 |
| G.A.A.B Plumbing Ltd | Construction | 2022 |
| G.S.I. (U.K.) Limited | Professional & scientific | 1970 |
| G4 Contractors Ltd | Construction | 2023 |
| Gabbi Limited | Professional & scientific | 2022 |
| Gabriella Home Health Limited | Health & social care | 2020 |
| Galower Developments Limited | Construction | 2022 |
| Gamch Estates Limited | Real estate | 2025 |
| Game Labs Limited | Professional & scientific | 2014 |
| Garcha Property Group Ltd | Real estate | 2017 |
| Garkov Ltd | Construction | 2020 |
| GB Cakes Limited | Wholesale & retail | 2022 |
| GB Invest | Other services | 2017 |
| GB Invest (Holdings) Limited | Financial services | 2019 |
| GDC Build Ltd | Construction | 2025 |
| GDC Ukgb Limited | Professional & scientific | 2022 |
| Gear and Grid Limited | Wholesale & retail | 2025 |
| Geemf III GP Limited | Financial services | 2007 |
| GEF ASF GP Ltd | Financial services | 2009 |
| GEF UK GP Holdings Ltd | Financial services | 2018 |
| Gelismek Limited | Information & communication | 2022 |
| GEM Products UK Limited | Wholesale & retail | 2022 |
| Gemac Hydraulics Limited | Professional & scientific | 2008 |
| General Trading Paname Ltd | Other services | 2019 |
| Geniusbit Services Ltd | Information & communication | 2021 |
| Gensys Limited | Administrative & support | 2004 |
| Gent Consulting Ltd | Information & communication | 2016 |
| GEO Creations UK Ltd | Wholesale & retail | 2020 |
| Geofem (UK) Limited | Professional & scientific | 2022 |
| George Health Enterprises UK Limited | Health & social care | 2017 |
| George Medicines UK Limited | Professional & scientific | 2020 |