| F.R.I.Creative Ltd | Arts & recreation | 2014 |
| F1 Estates Ltd | Real estate | 2014 |
| F19 Detailing & Customs Ltd | Administrative & support | 2022 |
| F1RST Actuarial Limited | Financial services | 2004 |
| F3 Olowu Ltd | Information & communication | 2020 |
| F5 Ltd | Information & communication | 2021 |
| FA Certificate Verification Company Limited | Information & communication | 2025 |
| FA Experts Limited | Information & communication | 2023 |
| FA Lettings Ltd | Real estate | 2025 |
| FA Pharma Consultancy Ltd | Administrative & support | 2017 |
| FA Properties Group Ltd | Real estate | 2025 |
| FA Property Management Services Ltd | Administrative & support | 2013 |
| FAA Installations Limited | Construction | 2012 |
| FAB Canada UK Limited | Hospitality | 2021 |
| FAB Concept Ltd | Manufacturing | 2026 |
| FAB Consultancy Limited | Professional & scientific | 2004 |
| FAB Education Limited | Education | 2015 |
| FAB Health Solutions Limited | Health & social care | 2024 |
| FAB Media Ltd | Information & communication | 2024 |
| FAB Metals Yorkshire Limited | Manufacturing | 2015 |
| FAB Technology Limited | Real estate | 2000 |
| Fab-Tek Installations Limited | Manufacturing | 2010 |
| FAB4 Security Ltd | Administrative & support | 2022 |
| Fabled Stories Ltd | Other services | 2026 |
| Fablr Limited | Information & communication | 2015 |
| Fabric Change Limited | Manufacturing | 2022 |
| Fabric Filter Services Limited | Manufacturing | 1975 |
| Fabric Fresh Limited | Administrative & support | 2024 |
| Fabricated Solutions Ltd | Construction | 2020 |
| Fabrication Crafts Ltd | Wholesale & retail | 2010 |
| Fabrice Transport Limited | Transport & logistics | 2019 |
| Fabriclean Solutions Limited | Other services | 2013 |
| Fabrics of Leeds Ltd | Wholesale & retail | 2020 |
| Fabrikk LLP | | 2012 |
| Fabulous Flooring Limited | Wholesale & retail | 2017 |
| Fabulous Freelance Ltd | Administrative & support | 2026 |
| Fabulous Media Limited | Information & communication | 2022 |
| Fabulously Rich Ltd | Wholesale & retail | 2024 |
| Facai 888 Ltd | Hospitality | 2024 |
| FACAI666 Ltd | Hospitality | 2024 |
| Face Aesthetic Clinic (Leeds) Limited | Health & social care | 2017 |
| Face Boss Clinic Ltd | Other services | 2025 |
| Face Boss Ltd | Other services | 2024 |
| Face Facts Fieldwork Ltd | Professional & scientific | 2018 |
| Face Food Pizzeria Ltd | Hospitality | 2024 |
| Face Forward Foundation Ltd | Health & social care | 2012 |
| Face Medical Supplies Ltd | Other services | 2016 |
| Face West Limited | Wholesale & retail | 1997 |
| FACE2FACE Business Club Ltd | Education | 2023 |
| FACE2FACE Group Marketing Limited | Professional & scientific | 2024 |
| Facefood Ltd | Hospitality | 2015 |
| Faceperfect Clinic Limited | Other services | 2013 |
| Facer Printers Limited | Manufacturing | 1997 |
| Faci Echem Ltd | Manufacturing | 1999 |
| Facial Enhancement Suite Limited | Health & social care | 2017 |
| Fact (Leeds) Limited | Education | 2021 |
| Fact Wrap Limited | Education | 2008 |
| Factor One Marketing Ltd | Professional & scientific | 2019 |
| Factoryninetyeight Ltd | Wholesale & retail | 2022 |
| Facultatieve Technologies Limited | Manufacturing | 1959 |
| Facultatieve Technologies UK Limited | Professional & scientific | 1990 |
| Fadak Healthcare Services Ltd | Health & social care | 2014 |
| Fadal Ltd | Health & social care | 2019 |
| Fadden Anaesthetics Ltd | Health & social care | 2026 |
| Fade Corner Limited | Other services | 2025 |
| Fadeable Limited | Manufacturing | 1973 |
| Faded Mist Limited | Construction | 2019 |
| Fading Footprints Limited | Professional & scientific | 2008 |
| Fads Trading Ltd | Wholesale & retail | 2020 |
| FAE Film BP Ltd | Information & communication | 2021 |
| FAE Film BW Ltd | Information & communication | 2021 |
| Faelsafe Electrical Limited | Manufacturing | 2014 |
| Faelsafe Life Safety Limited | Manufacturing | 2012 |
| Faez Khan Ltd | Health & social care | 2007 |
| Fafa CHA Ltd | Hospitality | 2023 |
| Fafa Healthy Food Limited | Hospitality | 2019 |
| Fagan & Castle (Properties) Limited | Professional & scientific | 2002 |
| Fahad Durrani Limited | Financial services | 2019 |
| Faham Empire Ltd | Wholesale & retail | 2025 |
| Faheems Hyderabadi DUM Biryani Ltd | Hospitality | 2020 |
| Faingold Holdings Limited | Financial services | 2018 |
| Faingold Properties Limited | Real estate | 2018 |
| Fair Deal Windows Yorkshire Limited | Construction | 2023 |
| Fair PAY Hub Limited | Administrative & support | 2021 |
| Fairbairn Lawson Realisations (Irlam) Limited | | 1900 |
| Fairbriar (Salford) Land Developments Limited | Construction | 2011 |
| Fairbriar Development Holdings Limited | Real estate | 2017 |
| Fairbriar Developments (Salford) Limited | Construction | 2011 |
| Fairbriar Hatbox Limited | Construction | 2014 |
| Fairbriar Management PH1 Limited | Construction | 2017 |
| Fairbriar Railings Investments Limited | Real estate | 2025 |
| Fairbriar Real Estate Developments Limited | Real estate | 2014 |
| Fairbriar Real Estate Limited | Financial services | 2014 |
| Fairbrother Jones Limited | Water & waste | 1980 |
| Fairburn Convenience Store Ltd | Wholesale & retail | 2024 |
| Fairburn Investments Limited | Financial services | 2024 |
| Fairburn Properties Limited | Real estate | 2016 |
| Fairchild Safeguarding Limited | Education | 2020 |
| Fairfax 3D Design Limited | Professional & scientific | 2016 |
| Fairfax Securities Limited | Construction | 1983 |