| FAB Preji Limited | Hospitality | 2015 |
| Fabian Popa Ltd | Other services | 2015 |
| Fabiance Limited | Health & social care | 2025 |
| Fabilous Ltd | Wholesale & retail | 2025 |
| Fabit Consultancy Solutions Ltd | Professional & scientific | 2023 |
| Fabric Centre Limited | Wholesale & retail | 2009 |
| Fabrizio Company Services Ltd | Administrative & support | 2016 |
| Fabworth Ltd | Wholesale & retail | 2023 |
| FAC Ventures Ltd | Wholesale & retail | 2021 |
| Factory Clearing House Limited | Wholesale & retail | 2011 |
| FAD Developments Ltd | Construction | 2020 |
| Fadarex Property Limited | Real estate | 2022 |
| Fadent Limited | Health & social care | 2012 |
| Fades United Limited | Other services | 2025 |
| Fadez Barberz Ltd | Other services | 2024 |
| Fadhal Holdings Ltd | Real estate | 2025 |
| Fadhal Impact CIC | Information & communication | 2026 |
| Fadhal Limited | Real estate | 2024 |
| FAE Stuff Limited | Wholesale & retail | 2021 |
| Fafab Integrated Facilities Ltd | Administrative & support | 2026 |
| Fafs Retail Ltd | Wholesale & retail | 2026 |
| Fahadholdings Limited | Wholesale & retail | 2025 |
| Fahani Ltd | Hospitality | 2025 |
| Fahd Aromatics Limited | Construction | 2025 |
| Fahzen Enterprise Ltd | Real estate | 2025 |
| Fainens Limited | Financial services | 2025 |
| Fair Deal Services Ltd | Real estate | 2023 |
| Fair Links Ltd | Real estate | 2013 |
| Fair MEX Limited | Financial services | 2006 |
| Fair Multi BIZ Ltd | Wholesale & retail | 2025 |
| Fair Properties Ltd | Real estate | 2022 |
| Fair-Five Food Distribution Limited | Wholesale & retail | 2021 |
| Fairacre Contractors Limited | Construction | 2010 |
| Faircross Care Home London Limited | Other services | 2016 |
| Fairdale Pharmacy Ltd | Wholesale & retail | 1991 |
| Fairdeal Builders Ltd | Construction | 2014 |
| Fairfield Property Investments Ltd | Real estate | 2019 |
| Fairflo Environmental Ltd | Water & waste | 2021 |
| Fairhaven Medihealth Limited | Wholesale & retail | 2026 |
| Fairkey Ltd | Wholesale & retail | 2022 |
| Fairlane Hart Limited | Information & communication | 2023 |
| Fairlawn Associates Ltd | Real estate | 2015 |
| Fairlop Developments Limited | Construction | 2016 |
| Fairmaids Laundry Ltd | Other services | 2018 |
| Fairmont College Limited | Education | 2024 |
| Fairoak Construction (UK) Limited | Construction | 2005 |
| Fairoak Developments London Ltd | Construction | 2013 |
| Fairview Lets Limited | Real estate | 2001 |
| Fairville Assets Limited | Real estate | 2024 |
| Fairville Business Services Ltd | Professional & scientific | 2026 |
| Fairville Estate Limited | Real estate | 2023 |
| Fairville Property Assets Limited | Real estate | 2025 |
| Fairway Building Consultancy Ltd | Real estate | 2026 |
| Fairway Facilities UK Ltd | Construction | 2001 |
| Faisal Gents Hairdressers Ltd | Other services | 2012 |
| Faith Accountancy Solutions Limited | Professional & scientific | 2021 |
| Faith Investments Ltd | Real estate | 2022 |
| Faiza Munir Ltd | Wholesale & retail | 2025 |
| Faizan Blinds Limited | Wholesale & retail | 2017 |
| Faizi Freight Ltd | Transport & logistics | 2023 |
| Faizi Group Limited | Real estate | 2017 |
| Fajr Solutions Ltd | Administrative & support | 2025 |
| Falafel Queen Ltd | Hospitality | 2016 |
| Falah RMS Limited | Financial services | 2026 |
| Falak Solutions Ltd | Information & communication | 2021 |
| Falcon Brothers Ltd | Professional & scientific | 2022 |
| Falcon Building Development Solutions Limited | Construction | 2024 |
| Falcon City Ltd | Real estate | 2024 |
| Falcon Elite Moving Services Limited | Transport & logistics | 2010 |
| Falcon EYE Protection Ltd | Administrative & support | 2025 |
| Falcon High Traders Ltd | Wholesale & retail | 2025 |
| Falcon London Services Ltd | Wholesale & retail | 2024 |
| Falcon Money Ltd | Professional & scientific | 2022 |
| Falcon Motors Ltd | Wholesale & retail | 2024 |
| Falcon Park Laboratories Limited | Wholesale & retail | 2000 |
| Falcon Ride Ltd | Transport & logistics | 2024 |
| Falcon U Ltd | Real estate | 2023 |
| Falconix Limited | Wholesale & retail | 2018 |
| Falcons Stylish Ltd | Wholesale & retail | 2025 |
| Fallowfield Stay Limited | Real estate | 2021 |
| Falmouth Accountancy Ltd | Professional & scientific | 2002 |
| Falmouth Stay Limited | Real estate | 2022 |
| Falola Fitness Ltd | Arts & recreation | 2025 |
| FAM Construction Ltd | Construction | 2022 |
| FAM Consultant Ltd | Professional & scientific | 2024 |
| FAM Entertainment Ltd | Professional & scientific | 2023 |
| FAM Removal Ltd | Transport & logistics | 2021 |
| FAM Trading Ltd | Manufacturing | 2017 |
| Fam'Z Peri Peri Limited | Hospitality | 2016 |
| Fami Sports Limited | Manufacturing | 2021 |
| Family Bridges Limited | Health & social care | 2013 |
| Family Name Origins (Bognor) Limited | Wholesale & retail | 2002 |
| Famko Ltd | Wholesale & retail | 2011 |
| Famous International Limited | Wholesale & retail | 2019 |
| Famus Group Ltd | Wholesale & retail | 2023 |
| FAN Club Fcsb UK Ltd | Other services | 2024 |
| Fance Ltd | Wholesale & retail | 2025 |
| Fancy Diamonds Limited | Wholesale & retail | 2025 |
| Fancy Flights Ltd | Administrative & support | 2016 |
| Fancy Real Estate Limited | Real estate | 2025 |