| Facade Management and Consultancy Services Ltd | Professional & scientific | 2024 |
| Facchini Ltd | Wholesale & retail | 2023 |
| Face 24-7 (PVT) Limited | Health & social care | 2015 |
| Face and Body Contour Limited | Health & social care | 2024 |
| Face and Body Rooms Limited | Other services | 2025 |
| Face Electrical Limited | Construction | 2023 |
| Face Fairy Aesthetics Ltd | Health & social care | 2025 |
| Face First Aesthetics and Beauty Ltd | Other services | 2023 |
| Face Front Security Ltd | Other services | 2022 |
| Face Intelligence Limited | Administrative & support | 2016 |
| Faceclinicaesthetics Ltd | Health & social care | 2018 |
| Faced PMU & Cosmetics Ltd | Other services | 2025 |
| Faceless Apparel Ltd | Wholesale & retail | 2025 |
| Faceless Marketing Ltd | Professional & scientific | 2026 |
| Facemetic Ltd | Other services | 2024 |
| Facepunch Group Limited | Information & communication | 2014 |
| Facepunch Presents Limited | Information & communication | 2026 |
| Facepunch Studios Ltd | Information & communication | 2009 |
| Faces Today Limited | Real estate | 2008 |
| Facial Aesthetics and Beauty Limited | Health & social care | 2019 |
| Facial Field Ltd | Manufacturing | 2026 |
| Facial H Dresser Ltd | Other services | 2025 |
| Facial LAB Ltd | Other services | 2020 |
| Facial Spa Ltd | Other services | 2022 |
| Facilitate Business Ltd | Professional & scientific | 2026 |
| Facilitate Urban Limited | Professional & scientific | 2011 |
| Facilitating Services Limited | Other services | 2018 |
| Facilities & Corporate Solutions Limited | Manufacturing | 1996 |
| Facilities Support 24 7 Ltd | Administrative & support | 2020 |
| Facilitrade Services Ltd | Administrative & support | 2024 |
| Factories - Land & Houses Limited | Administrative & support | 2004 |
| Factory Road Studios CIC | Information & communication | 2026 |
| FACTORY2U.CO.UK Limited | Wholesale & retail | 2004 |
| Factual Staffing Services Ltd | Administrative & support | 2021 |
| Fadda Ltd | Health & social care | 2014 |
| Faddie Group Limited | Wholesale & retail | 2026 |
| Fade 1 Barber Ltd | Other services | 2026 |
| Fade IT Ltd | Other services | 2026 |
| Fade Stone Limited | Wholesale & retail | 2025 |
| Faded Ltd | Other services | 2016 |
| Fadee Services Ltd | Other services | 2020 |
| Fadexo Limited | Health & social care | 2013 |
| Fadi Express Ltd | Wholesale & retail | 2020 |
| Fadii Ltd | Wholesale & retail | 2025 |
| Faerie Tale Alpacas Ltd | Agriculture & fishing | 2010 |
| Fafuni Limited | Wholesale & retail | 2025 |
| Fagan Logistics Ltd | Wholesale & retail | 2024 |
| Fagrada Limited | Information & communication | 2024 |
| Fagus Limited | Administrative & support | 2005 |
| FAH Packaging Ltd | Administrative & support | 2022 |
| Fahad Luxury Limited | Wholesale & retail | 2026 |
| Fahad Solutions Ltd | Wholesale & retail | 2025 |
| Faheem Hussain Ltd | Wholesale & retail | 2025 |
| Fahim Real Estate Holdings Ltd | Financial services | 2023 |
| Fahim Spice Ltd | Hospitality | 2022 |
| Fahimaluxestays Ltd | Households | 2025 |
| Fahiqah's Learning Academy Ltd | Education | 2019 |
| Fahm Housing Ltd | Real estate | 2023 |
| Fahmann Autos Ltd | Wholesale & retail | 2024 |
| Fahren Taps Ltd | Wholesale & retail | 2020 |
| Fahrenheit Plumbing Contractors Ltd | Construction | 2023 |
| Faida Ltd | Professional & scientific | 2023 |
| Faim Consultants Ltd. | Health & social care | 2016 |
| Faimont Capital Real Estate Ltd | Construction | 2026 |
| Fair Biogenic Ltd | Professional & scientific | 2025 |
| Fair Deal Marketing UK Ltd | Real estate | 2023 |
| Fair Deal Music (Holdings) Limited | Real estate | 2016 |
| Fair Deal Music Limited | Wholesale & retail | 1996 |
| Fair Fuel Limited | Transport & logistics | 2017 |
| Fair Gold Ltd | Real estate | 2021 |
| Fair Group of Companies (UK) Limited | Real estate | 2025 |
| Fair Isaac Europe Limited | Information & communication | 2001 |
| Fair Isaac Services Limited | Information & communication | 1986 |
| Fair Isaac Software Holdings Limited | Financial services | 1992 |
| Fair Isaac UK Group Limited | Financial services | 2004 |
| Fair Isaac UK International Holdings Ltd. | Information & communication | 1988 |
| Fair Isaac UK Investment Holdings LP | | 2016 |
| Fair Products Limited | Wholesale & retail | 2023 |
| Fair Tax Accountants Ltd | Professional & scientific | 2018 |
| Fair Technologies Limited | Information & communication | 2010 |
| Fair Trend Ltd | Wholesale & retail | 2020 |
| Fairbrick PM Ltd | Real estate | 2025 |
| Fairbridge Finance Ltd | Financial services | 2026 |
| Faircomplus Limited | Administrative & support | 2004 |
| Fairdeal (B'Ham) Limited | Wholesale & retail | 2008 |
| Fairdeal PC Ltd | Real estate | 2018 |
| Fairestone Ltd | Administrative & support | 2026 |
| Fairfax Fish FRY KE Ltd | Hospitality | 2025 |
| Fairfield Accountants Ltd | Professional & scientific | 2013 |
| Fairfield Assets and Properties Limited | Real estate | 2022 |
| Fairfield Transport Services Limited | Transport & logistics | 2019 |
| Fairfield-Mabey Limited | Manufacturing | 1966 |
| Fairfields Developments (West Midlands) Limited | Real estate | 2017 |
| Fairgate Outsourcing Limited | Professional & scientific | 2023 |
| Fairground International Limited | Wholesale & retail | 2023 |
| Fairlight Equity Limited | Real estate | 2026 |
| Fairlight Musical Ltd | Arts & recreation | 2025 |
| Fairman Social Care Ltd | Professional & scientific | 2019 |
| Fairmans Estate Agents Ltd | Real estate | 2023 |
| Fairmans Estates Ltd | Real estate | 2023 |