| Fortune Compass Limited | Financial services | 2025 |
| Fortune Gleam Limited | Wholesale & retail | 2025 |
| Fortune House North West Ltd | Hospitality | 2016 |
| Fortune House Property Ltd | Real estate | 2017 |
| Fortune Hub Global Ltd | Wholesale & retail | 2026 |
| Fortune International Holdings Limited | Financial services | 2021 |
| Fortune Media Ecom Ltd | Wholesale & retail | 2021 |
| Fortune Panda Restaurants Ltd | Hospitality | 2023 |
| Fortune Sphere Limited | Wholesale & retail | 2024 |
| FORTUNEGARDEN666 Ltd | Hospitality | 2025 |
| Fortunelodge Limited | Real estate | 1991 |
| Fortunewealthy Limited | Real estate | 2023 |
| Forturn Limited | Manufacturing | 2025 |
| Forty Blessings Stays Ltd | Hospitality | 2026 |
| Forty Four Global Ltd | Administrative & support | 2023 |
| Forty One Investments Ltd | Real estate | 2026 |
| Forty Two CL Ltd | Real estate | 2018 |
| Forty-Seven Hotel Manchester Ltd | Hospitality | 2024 |
| FORTY3 Media Ltd | Information & communication | 2022 |
| FORTY6 Projects Limited | Professional & scientific | 2016 |
| Fortythreetwo Ltd | Transport & logistics | 2020 |
| Forukis Ltd | Professional & scientific | 2020 |
| Forum Conveniens LLP | | 2025 |
| Forum Leadership Services Ltd | Professional & scientific | 2024 |
| Forum NON Conveniens LLP | | 2025 |
| Forward Ascend Limited | Other services | 2025 |
| Forward Marketing Ltd | Information & communication | 2023 |
| Forward Technology Training Limited | Information & communication | 2023 |
| Forwarding Digital Limited | Information & communication | 1998 |
| Forwardleap Consultants (UK) Ltd. | Professional & scientific | 2013 |
| Forwardplus Limited | Wholesale & retail | 2011 |
| Forza Talent Acquisition Ltd | Administrative & support | 2017 |
| Fosab Global Services Limited | Wholesale & retail | 2008 |
| Foscrot Ltd. | Information & communication | 2013 |
| Fosse Court Limited | Health & social care | 2012 |
| Fosta Holdings Ltd | Information & communication | 2026 |
| Fostabam Ltd | Construction | 2025 |
| Foster Civil Engineering and Paving Limited | Construction | 2014 |
| Fosters Accountants Limited | Professional & scientific | 2006 |
| Fosters Couriers Limited | Transport & logistics | 2015 |
| Fotev Ltd | Construction | 2015 |
| Foto Velo Limited | Professional & scientific | 2011 |
| Fotogravur Photograver Ltd | Administrative & support | 2011 |
| Fotosense Limited | Wholesale & retail | 2001 |
| Fotune International Investment Limited | Financial services | 2024 |
| Foulds and Turton Limited | Construction | 1993 |
| Foulmouth Theatre Ltd | Arts & recreation | 2026 |
| Found Consciousness Limited | Health & social care | 2022 |
| Foundation Consult Limited | Professional & scientific | 2025 |
| Foundation for Science, Technology and Civilisation UK | Education | 2014 |
| Foundation Living Group Limited | Health & social care | 2026 |
| Foundation Websites Ltd | Professional & scientific | 2023 |
| Foundational Economy Research Ltd | Professional & scientific | 2020 |
| Foundational Health Ltd | Information & communication | 2024 |
| Foundational One Limited | Information & communication | 2023 |
| Foundations Employee Ownership Trust Limited | Professional & scientific | 2024 |
| Foundations in Housing Ltd | Real estate | 2025 |
| Foundations Independent Living Trust Limited | Health & social care | 2002 |
| Foundations of Wellness CIC | Health & social care | 2024 |
| Foundations Property Management Ltd | Real estate | 2011 |
| Founded Group Limited | Financial services | 2022 |
| Founder Capital Debenture Ltd | Professional & scientific | 2025 |
| Founder Creative Holdings Limited | Financial services | 2024 |
| Founder Creative Ltd | Information & communication | 2019 |
| Founders Align Limited | Information & communication | 2026 |
| Founders Dream Ltd | Wholesale & retail | 2026 |
| Founding a Village Ltd | Health & social care | 2025 |
| Foundnearby Ltd | Information & communication | 2026 |
| Foundry Code Ltd | Information & communication | 2026 |
| Foundry Financial Limited | Financial services | 2026 |
| Foundry Salford Management Company Limited | Real estate | 2015 |
| Fountain Court Recoveries Limited | Manufacturing | 1943 |
| Fountain Enterprise Services Limited | Administrative & support | 2022 |
| Fountain Finances Limited | Professional & scientific | 2012 |
| Fountain One Group Ltd | Wholesale & retail | 2023 |
| Fountain ST Developments Ltd | Construction | 2024 |
| Fountain Terrace Management Company Limited | Administrative & support | 2008 |
| Fountas Limited | Public administration | 2025 |
| Fountech Labs Limited | Information & communication | 2023 |
| Fountech OS Limited | Information & communication | 2026 |
| Four a Compliance Limited | Professional & scientific | 2024 |
| Four Acer Ltd | Extraterritorial | 2023 |
| Four Acres Dog Day Camp Limited | Other services | 2017 |
| Four Architects Limited | Professional & scientific | 2018 |
| Four Brothers Furniture Wholesale Ltd | Wholesale & retail | 2022 |
| Four by Two Property Limited | Construction | 2023 |
| Four Corners Comprehensive Investment Company Ltd | Wholesale & retail | 2025 |
| Four Floors Property Limited | Real estate | 2018 |
| Four Groups 1 Limited | Professional & scientific | 2002 |
| Four Groups 2 Limited | Professional & scientific | 2002 |
| Four Groups Limited | Professional & scientific | 2003 |
| Four Leaves Limited | Professional & scientific | 2011 |
| Four MAR Holdings Limited | Financial services | 2019 |
| Four MAR Limited | Manufacturing | 1995 |
| Four Oceans Services Limited | Professional & scientific | 2022 |
| Four Pillars Investment (Manchester) Ltd | Real estate | 2021 |
| Four Pillars Property Services Ltd | Construction | 2020 |
| Four Pines Care Ltd | Health & social care | 2022 |
| Four Points Desserts Ltd | Hospitality | 2025 |
| Four Rivers Ltd | Wholesale & retail | 2024 |