| Fittrip Ltd | Extraterritorial | 2024 |
| Fitudio Inc. Ltd | Wholesale & retail | 2020 |
| Fituri Group Limited | Health & social care | 2025 |
| Fitz Flooring Installation Ltd | Manufacturing | 2026 |
| Fitz Testing Services Ltd | Information & communication | 2026 |
| Fitzden Construction Ltd | Construction | 2018 |
| Fitzgerald of Codsall One Ltd | Other services | 2011 |
| Fitzio Ltd | Construction | 2024 |
| Fitzjohns Capital II LLP | | 2021 |
| Fitzjohns Capital II LP | | 2022 |
| Fitzjohns Capital III LP | | 2024 |
| Fitzjohns Capital Partners III LLP | | 2024 |
| Fitzjohns Capital Partners III LP | | 2026 |
| Fitzjohns Capital Partners Limited | Real estate | 2020 |
| Fitzpatrick Fuels Limited | Wholesale & retail | 2011 |
| Fitzpatrick Property Developments Ltd | Construction | 2025 |
| Fitzpatrick's Direct Ltd | Wholesale & retail | 2020 |
| Fitzpatricks Group & Co Limited | Real estate | 2026 |
| Fitzroy Bailey Limited | Construction | 2021 |
| Five 9S Holdings Ltd | Financial services | 2023 |
| Five 9S Realty Ltd | Real estate | 2016 |
| Five 9S Solutions Ltd | Information & communication | 2016 |
| Five Aces Ltd | Wholesale & retail | 2018 |
| Five Bros Holdings Ltd | Construction | 2021 |
| Five Chaps Limited | Other services | 2017 |
| Five Formula Lights Limited | Professional & scientific | 2025 |
| Five Hearts Cares Ltd | Health & social care | 2026 |
| Five Home Trading Ltd | Wholesale & retail | 2025 |
| Five Lakes PRM Ltd | Other services | 2020 |
| Five Oak Leisure Limited | Real estate | 1946 |
| Five Oak Partners Ltd | Real estate | 2025 |
| Five Piccadilly Management Company Limited | Real estate | 2009 |
| Five Plus Architects Limited | Professional & scientific | 2010 |
| Five Plus Architects London Limited | Professional & scientific | 2011 |
| Five Rivers TV Ltd | Information & communication | 2022 |
| Five Star Asian Foods Limited | Wholesale & retail | 2018 |
| Five Star Entertainment Manchester Ltd | Professional & scientific | 2010 |
| Five Star Holdings Group Limited | Financial services | 2025 |
| Five Star Marketing Ltd | Professional & scientific | 2026 |
| Five Star Marketing MCR Ltd | Wholesale & retail | 2019 |
| Five Star Media Limited | Arts & recreation | 2025 |
| Five Star Properties (UK) Limited | Extraterritorial | 2008 |
| Five Star Valeting and Detailing Limited | Wholesale & retail | 2025 |
| Five Stars Events UK Ltd | Arts & recreation | 2026 |
| Five Stars INT Ltd | Wholesale & retail | 2026 |
| Five Stars Savers Limited | Wholesale & retail | 2017 |
| Five Towns Developments Ltd | Real estate | 2021 |
| Five Towns Limited | Real estate | 2024 |
| Five Wealth Holdings Limited | Financial services | 2022 |
| Five Wealth Intermediate Limited | Financial services | 2022 |
| Five Wealth Limited | Financial services | 2016 |
| Five-A-Side Ltd | Information & communication | 2013 |
| FIVE5STARS Limited | Professional & scientific | 2018 |
| Fivedimes Ltd | Extraterritorial | 2001 |
| Fivefive Clothing Ltd | Wholesale & retail | 2025 |
| Fiveming Limited | Wholesale & retail | 2024 |
| Fiveoaks (Knutsford) Residential Limited | Real estate | 2018 |
| Fiveola.Com Limited | Information & communication | 2012 |
| Fivepak CIC | Other services | 2024 |
| Fiveriversdevelopments Ltd | Construction | 2025 |
| Fivestarfits Ltd | Wholesale & retail | 2026 |
| Fivestars Electrical Ltd | Construction | 2023 |
| Fivestaruk Limited | Wholesale & retail | 2016 |
| Fiveways Autos Ltd | Wholesale & retail | 2024 |
| Fiveways M O T Station Limited | Wholesale & retail | 2019 |
| Fiwa Talent Limited | Administrative & support | 2024 |
| Fiwfa Ltd | Administrative & support | 2019 |
| Fiwi Food Ltd | Hospitality | 2021 |
| FIX & Repairs Limited | Construction | 2025 |
| FIX and Flow Manchester Limited | Real estate | 2025 |
| FIX Auto Ltd | Wholesale & retail | 2024 |
| FIX Fitness and Therapy Ltd | Arts & recreation | 2022 |
| FIX Genius Limited | Other services | 2019 |
| FIX MCR Ltd | Arts & recreation | 2023 |
| FIX My Phone MCR Ltd | Manufacturing | 2026 |
| FIX N Flip Ltd | Wholesale & retail | 2025 |
| FIX Right Ltd | Construction | 2025 |
| FIX UP Academy Ltd | Education | 2025 |
| Fix-Ableuk Ltd | Construction | 2025 |
| FIX8 Creative Limited | Extraterritorial | 2010 |
| FIX8 Group (Manchester) Limited | Administrative & support | 2005 |
| FIX8 Limited | Extraterritorial | 2012 |
| Fixallparts Ltd | Wholesale & retail | 2025 |
| Fixbycycle Ltd | Wholesale & retail | 2025 |
| Fixcert Ltd | Information & communication | 2026 |
| Fixdex (Hongkong) Co Limited | Wholesale & retail | 2026 |
| Fixfast Motors Limited | Wholesale & retail | 2026 |
| Fixfy Ltd | Hospitality | 2018 |
| Fixian Ltd | Administrative & support | 2021 |
| Fixify Services Ltd | Construction | 2025 |
| Fixit Maintenance & Glazing Services Limited | Manufacturing | 2025 |
| Fixit Pro Limited | Construction | 2025 |
| Fixmydeviceco Ltd | Other services | 2025 |
| Fixmyrun Ltd | Health & social care | 2019 |
| Fixpro Technologies Ltd | Information & communication | 2026 |
| Fixthat Ltd | Other services | 2020 |
| Fixtuur Ltd | Information & communication | 2012 |
| Fixvan Ltd | Construction | 2025 |
| Fixxtek Ltd | Wholesale & retail | 2024 |
| Fiying Thai Ltd | Wholesale & retail | 2025 |