| Fraser Building & Civil Engineers Limited | Construction | 2010 |
| Fraser Estates (London) Ltd | Real estate | 2018 |
| FRB Builders Ltd | Construction | 2020 |
| Freddie Poser (Music) Limited | Administrative & support | 1955 |
| Frederick Gordon & Co. Limited | Construction | 1946 |
| Free Drains Services Limited | Construction | 2006 |
| Free Finger Real Estate Limited | Real estate | 2025 |
| Free Practise Ltd. | Professional & scientific | 2010 |
| Free Ventures Limited | Households | 2022 |
| Freed Services Ltd | Construction | 2021 |
| Freedive Menorca Limited | Education | 2024 |
| Freeflow Marine Expeditions Limited | Information & communication | 2020 |
| Freelance Developer Ltd | Construction | 2023 |
| Freerange Building Solutions Ltd | Construction | 2012 |
| Freesia Services Limited | Transport & logistics | 2020 |
| Fresh Code Limited | Information & communication | 2014 |
| Fresh Finish Cleaning Solutions Ltd | Administrative & support | 2024 |
| Fresh Start Property Services Ltd | Administrative & support | 2024 |
| Freshwater Bullion Trading Ltd | Wholesale & retail | 2026 |
| Freshwater Investments Ltd | Financial services | 2024 |
| Freshwater Petroleum Ltd | Wholesale & retail | 2024 |
| Frestons Estate Agents Limited | Real estate | 2023 |
| Freur Bristol Limited | Real estate | 2021 |
| Freur Holdco Limited | Real estate | 2021 |
| Freur Reading Limited | Real estate | 2021 |
| Friends of Manipay Hospital | Health & social care | 2005 |
| Frobisher Mews Residents Association Limited | Households | 2001 |
| FROGNAL39E Ltd | Real estate | 2025 |
| From China Barnet Ltd | Hospitality | 2024 |
| Fromthefavela Ltd | Information & communication | 2025 |
| Frontier Collective Ltd | Information & communication | 2026 |
| Frontline Technologies Ltd | Information & communication | 2008 |
| Frrn Limited | Real estate | 2024 |
| Fruition Talent Group Ltd | Administrative & support | 2018 |
| Fsalim Limited | Health & social care | 2015 |
| FSM Systems Ltd | Administrative & support | 2020 |
| FT Music Ltd | Manufacturing | 2025 |
| FTT Property Limited | Real estate | 2026 |
| FU House Ltd | Hospitality | 2015 |
| Fudoshin Art Ltd | Administrative & support | 2020 |
| Fudoshin Piercing Limited | Administrative & support | 2020 |
| Fudoshin Tattoos Ltd | Administrative & support | 2020 |
| Full of Future Ltd | Health & social care | 2019 |
| Full Stop Charlie Ltd | Professional & scientific | 2023 |
| Fullproof Services Limited | Administrative & support | 2005 |
| Fully Funktional Limited | Arts & recreation | 2005 |
| Fulshaw Capital Holdings Limited | Professional & scientific | 2024 |
| Fulvia Limited | Information & communication | 2010 |
| Funky Home Ltd | Manufacturing | 2023 |
| Furniture Emporium London Ltd | Wholesale & retail | 2017 |
| Furniture Tree Ltd | Wholesale & retail | 2019 |
| Fusion Bespoke Interiors Ltd | Construction | 2025 |
| Fusion Consultancy Limited | Information & communication | 1998 |
| Fusion Professional Ltd | Administrative & support | 2016 |
| Fusion Property Refurbishment Ltd | Construction | 2023 |
| Future Design and Construction Ltd | Construction | 2022 |
| Future Framework Education Ltd | Professional & scientific | 2025 |
| Future Fuelling Limited | Professional & scientific | 2018 |
| Future Intelligence Aviation Ltd | Professional & scientific | 2019 |
| Future Intelligence Ltd | Information & communication | 2012 |
| Future Tech Info Limited | Information & communication | 2019 |
| Future Traffic Solutions Limited | Information & communication | 2022 |
| Futurebility Limited | Administrative & support | 2000 |
| G & a Partners LLP | | 2021 |
| G & G Automotive Limited | Wholesale & retail | 2011 |
| G & G Homes & Interiors Ltd | Real estate | 2021 |
| G & S Webster Ltd | Financial services | 2023 |
| G a Developments Limited | Construction | 2015 |
| G a Steer Investments Ltd | Financial services | 2019 |
| G Adams Films Limited | Administrative & support | 2026 |
| G Clear Ltd | Education | 2011 |
| G Clear Properties Ltd | Real estate | 2019 |
| G Eckert Holdings Limited | Financial services | 2021 |
| G M Telecoms Consultants Limited | Information & communication | 2016 |
| G Marra Plumbing and Heating Ltd | Construction | 2019 |
| G&B Autospray Limited | Wholesale & retail | 2021 |
| G&G Productions Ltd | Construction | 2021 |
| G&J Construction Services Ltd | Construction | 2024 |
| G&J Poullis Limited | Real estate | 2020 |
| G-Force Capital Limited | Financial services | 2021 |
| G-Force Media Limited | Information & communication | 2023 |
| G.A.D. (UK) Ltd | Real estate | 1998 |
| G.G.Gillett Limited | Other services | 1952 |
| G.S.R. Properties Investments Limited | Other services | 1997 |
| G8G Northwood Limited | Financial services | 2012 |
| Gabale Ltd | Real estate | 2024 |
| GABI30 Ltd | Transport & logistics | 2015 |
| Gabion Homes Limited | Real estate | 2002 |
| Gabiris Consulting Ltd | Professional & scientific | 2022 |
| Gada Property Investments Limited | Construction | 2014 |
| Gailxandrey Limited | Professional & scientific | 2022 |
| Gainquote Limited | Real estate | 1982 |
| GAL Libra Ltd | Professional & scientific | 2023 |
| Galahad Estates Ltd | Real estate | 2021 |
| Galenna Limited | Professional & scientific | 2025 |
| Gali Solutions Ltd | Information & communication | 2011 |
| Galian Group Ltd | Administrative & support | 2019 |
| Galian Investments Ltd | Financial services | 2021 |
| Galian Property LLP | | 2021 |
| Galil London Limited | Real estate | 2016 |