| Fidelitas Ltd | Administrative & support | 2022 |
| Field Coating Solutions Limited | Professional & scientific | 2012 |
| Fieldcraft Enterprises Limited | Construction | 1998 |
| Fields Clinic Limited | Health & social care | 2003 |
| Fieldside Court Management Limited | Households | 1998 |
| Fieldton Estates Limited | Real estate | 2005 |
| Fildes Fire Safety Ltd | Public administration | 2023 |
| Filmmaker Phil Limited | Information & communication | 2013 |
| Films in Upton Limited | Information & communication | 2023 |
| Finance My VAT Limited | Financial services | 2025 |
| Financial Fortress Limited | Financial services | 2014 |
| Finch Holdings Limited | Real estate | 2023 |
| Find Well Ltd | Wholesale & retail | 2024 |
| Findlater C&C Limited | Professional & scientific | 2007 |
| Finest Hour Ltd | Manufacturing | 2024 |
| Finley Park (Farnworth) Management Company Limited | Households | 2007 |
| Finsoft Consultancy Limited | Information & communication | 2021 |
| Finsoft Services Limited | Professional & scientific | 2024 |
| Finzite Limited | Information & communication | 2025 |
| Fiorry Social Ltd | Information & communication | 2019 |
| FIR Tree Lane (Land Management Company) Limited | Real estate | 2013 |
| Firacatering Ltd | Hospitality | 2026 |
| Firdale Park Apartments Management Company (NO.1) Limited | Households | 1982 |
| Firdale Park Apartments Management Company (NO.4) Limited | Households | 1983 |
| Firdale Park East Apartments Management Company (Number 1) Limited | Households | 1985 |
| Fire Sector Competency Limited | Professional & scientific | 2018 |
| Fireball Media Limited | Professional & scientific | 2001 |
| Firebrand Direct Ltd | Wholesale & retail | 2018 |
| Firecrest Law Limited | Administrative & support | 2017 |
| Fireflytech Ltd | Information & communication | 2025 |
| Fires & Stoves Chester Limited | Construction | 2022 |
| Firs Education Limited | Education | 2009 |
| First 2 Group (Holdings) Limited | Professional & scientific | 2006 |
| First 2 Group Limited | Administrative & support | 2006 |
| First Call Accident Management Limited | Professional & scientific | 2008 |
| First Call Community Systems Limited | Health & social care | 2002 |
| First Call Resourcing Limited | Administrative & support | 2015 |
| First Celtic Toys and Learning Ltd | Wholesale & retail | 2011 |
| First Celtic Toys and Learning-Holding- Ltd | Wholesale & retail | 2012 |
| First Century Events Ltd | Arts & recreation | 2019 |
| First Contact DT Ltd | Professional & scientific | 2022 |
| First Division Builders Ltd | Construction | 2016 |
| First Home Step Ltd | Households | 2018 |
| First Home Step Trading Ltd | Administrative & support | 2013 |
| First Law Solutions Limited | Other services | 2014 |
| FIRST4GLASS Ltd | Wholesale & retail | 2016 |
| Fit Factor Nutrition UK Ltd | Wholesale & retail | 2015 |
| Fit Law Limited | Professional & scientific | 2024 |
| Fitz Asset Finance Limited | Professional & scientific | 2019 |
| Fitzpat Investments Ltd | Real estate | 2020 |
| Fitzwilton Finance (U.K.) Limited | Professional & scientific | 1996 |
| Fivenights.Com Ltd | Extraterritorial | 2011 |
| FIX & Repair Engineering Ltd. | Information & communication | 2011 |
| FIX Lift Ltd | Professional & scientific | 2025 |
| Fixing Services Ltd | Other services | 2025 |
| FJ Invest Ltd | Real estate | 2016 |
| FJM (NW) Limited | Financial services | 2010 |
| FJP Business Services Limited | Other services | 2011 |
| Flakefame Limited | Households | 1986 |
| Flames 34 Ltd | Hospitality | 2022 |
| Flamio Burger Pizza Kebab and Shakes Limited | Hospitality | 2026 |
| Flamio Dessert Limited | Hospitality | 2025 |
| Flanagan Consultancy Limited | Professional & scientific | 2019 |
| Flat Air Limited | Real estate | 2025 |
| Flat Earthers Ltd | Hospitality | 2024 |
| Flat Taverns Limited | Real estate | 2024 |
| Flaxmere Properties Limited | Real estate | 2012 |
| Fleet Hosting Limited | Information & communication | 2026 |
| Fleming Technical Limited | Manufacturing | 1993 |
| Flemings Jeans (Liverpool) Limited | Extraterritorial | 2006 |
| Flerie Invest Ltd | Administrative & support | 2022 |
| Fletcher Maritime Limited | Transport & logistics | 2014 |
| Fletcher Risk Management Limited | Financial services | 2017 |
| Fletchers Developments & Investments Limited | Real estate | 2026 |
| Fleur Marie Ltd | Wholesale & retail | 2025 |
| Flexible Building Services Limited | Construction | 2017 |
| Flexible Trading Limited | Wholesale & retail | 2012 |
| Flintshire Property Development and Maintenance Ltd | Real estate | 2012 |
| Flintshire Windows Limited | Construction | 2003 |
| Flippin’ Properties Limited | Real estate | 2019 |
| Flipstone Developments Ltd | Real estate | 2026 |
| Flique Hair Ltd | Hospitality | 2017 |
| Flookersbrook (Rowan House Flats) Limited | Households | 1980 |
| Floral Wish Ltd | Wholesale & retail | 2020 |
| Florensis Consulting Ltd | Information & communication | 2025 |
| Florentyna Limited | Wholesale & retail | 2016 |
| Florin Healthcare Recruitment Ltd | Administrative & support | 2023 |
| Flourish From the Past Ltd | Education | 2022 |
| Flowers by Emma of Chester Limited | Wholesale & retail | 2017 |
| Flowtech Properties Limited | Real estate | 2017 |
| Floyd Twenty One Limited | Real estate | 2023 |
| Fluent IT Limited | Information & communication | 2002 |
| Fluid Assets 25 Limited | Construction | 2025 |
| Fluid Assets Limited | Construction | 2020 |
| Fluid Power Centre Limited | Administrative & support | 2000 |
| Fluid Property Group Ltd | Real estate | 2025 |
| Flutter Shutter Ltd | Manufacturing | 2018 |
| Flutterlab Ltd | Manufacturing | 2018 |
| Flux Funding Limited | Financial services | 2017 |
| Flying Badger Consulting Ltd | Professional & scientific | 2019 |