| Foray Trading Limited | Other services | 2025 |
| Forces in Mind Limited | Extraterritorial | 2014 |
| Fordingbridge Tyre and Battery Limited | Wholesale & retail | 2000 |
| Fordy Marine Solutions Ltd | Construction | 2025 |
| Forensics Care Support Limited | Health & social care | 2021 |
| Forest & ARB Plant Hire Ltd | Manufacturing | 2026 |
| Forest Digby Ltd | Professional & scientific | 2022 |
| Forest Edge Accountancy Limited | Professional & scientific | 2014 |
| Forest Edge Downton Management Company Limited | Households | 2006 |
| Forest Edge Electrical Limited | Construction | 2020 |
| Forest Edge Properties Ltd | Real estate | 2016 |
| Forest of Bere Limited | Agriculture & fishing | 2023 |
| Foresters Way Management Company Limited | Households | 2019 |
| Forestside Consultancy Limited | Education | 2010 |
| Forever England Limited | Wholesale & retail | 2002 |
| Forkingout Limited | Hospitality | 2002 |
| Form One Limited | Construction | 2012 |
| Formic Networks Limited | Professional & scientific | 2025 |
| Fort Consulting Ltd | Professional & scientific | 2024 |
| Fortcumberlandarms Ltd | Hospitality | 2026 |
| Forte Logistics Consulting Limited | Professional & scientific | 2021 |
| Forthcore Limited | Administrative & support | 2019 |
| Fortibus Fields at Apsham Grange (Topsham) Management Company Limited | Households | 2025 |
| Fortunes Therapy Farm CIC | Other services | 2025 |
| Fortythreewood Ltd | Hospitality | 2024 |
| Forum Heritage Services Limited | Professional & scientific | 2007 |
| Foster Careline Ltd. | Health & social care | 2008 |
| Foundations Advisory Ltd | Professional & scientific | 2026 |
| Foundry Assets Limited | Administrative & support | 2025 |
| Foundry Enterprises Limited | Financial services | 2018 |
| Foundry Food Partners Ltd | Professional & scientific | 2026 |
| Foundry Property Limited | Real estate | 2024 |
| Foundry Rare Breeds Limited | Agriculture & fishing | 2018 |
| Four Corners Catering Limited | Hospitality | 2017 |
| Four Dragons Consulting Limited | Professional & scientific | 2024 |
| Four Oaks Investment Limited | Professional & scientific | 2000 |
| Four Seasons Heating and Plumbing Limited | Construction | 2021 |
| Fourninefour Limited | Construction | 2024 |
| FOV Solutions Ltd | Administrative & support | 2023 |
| Fovea Communications Limited | Professional & scientific | 2006 |
| FOX & FIG Digital Ltd | Professional & scientific | 2023 |
| FOX and Mole Properties Limited | Real estate | 2023 |
| FOX Grant Limited | Real estate | 2004 |
| FOX Grant Partnerships Limited | Extraterritorial | 2006 |
| Foxbridge Property Ltd | Real estate | 2026 |
| Foxden Limited | Information & communication | 2020 |
| Foxhill (Brackley) Management Company Limited | Households | 2016 |
| Foxhills (Barnt Green) Management Company Limited | Households | 2015 |
| Foxtate Farming Ltd | Agriculture & fishing | 2020 |
| FPE Media Limited | Administrative & support | 2014 |
| FPR Consulting Limited | Information & communication | 2026 |
| FPS Group Services Limited | Real estate | 2005 |
| Fractional Contracts Limited | Professional & scientific | 2024 |
| Frampton Park Management Limited | Construction | 2014 |
| Frances & MAE Home Ltd | Wholesale & retail | 2021 |
| Francis Gardens (Silver END) Management Company Limited | Households | 2025 |
| Francis Gate (Boars TYE Road) Management Company Limited | Real estate | 2018 |
| Francis Moore Holdings Limited | Financial services | 2013 |
| Franginia Ltd | Health & social care | 2021 |
| Frankie & SON Services Ltd | Transport & logistics | 2019 |
| Fraxinus Publishing Ltd | Information & communication | 2026 |
| Fred & Co Limited | Professional & scientific | 2012 |
| Frederick Hope Cabinetmakers Ltd | Professional & scientific | 2020 |
| Freedom Driving Instruction Limited | Transport & logistics | 2010 |
| Freelance Entry Solutions Limited | Construction | 2002 |
| Freeze Inc Ltd | Professional & scientific | 2023 |
| Fremar Communications Limited | Manufacturing | 2007 |
| Fremar Support Services Ltd | Other services | 2023 |
| French ELM Advisors Limited | Professional & scientific | 2021 |
| Frenchmoor Garden Buildings Limited | Manufacturing | 2002 |
| Fresh and Wild Adventures Ltd | Education | 2021 |
| Freshfield Estates Limited | Construction | 2003 |
| Friars Hayes Farm Limited | Agriculture & fishing | 1956 |
| Frideswide Road (Oxford) Management Company Limited | Households | 2023 |
| Friends of Bury Limited | Other services | 2014 |
| Fro-J's Ltd | Professional & scientific | 2026 |
| Frogit Crochet Ltd | Wholesale & retail | 2024 |
| From the Woods Ltd | Hospitality | 2025 |
| Frontline Military Supplies Ltd | Wholesale & retail | 2025 |
| Frost Hill Consultancy Limited | Professional & scientific | 2009 |
| FRY Day Foods Ltd | Hospitality | 2024 |
| Fryfilm Productions Ltd | Information & communication | 2015 |
| Fryz Limited | Hospitality | 2011 |
| Fsaym Limited | Education | 2015 |
| Fuel Mechanics Limited | Manufacturing | 2026 |
| Fuggles Court (Benenden) Management Co. Ltd. | Households | 1996 |
| Fugglestone Red Management Company Limited | Households | 1988 |
| Fulford Place Ltd | Households | 2017 |
| Fulham Partners Ltd | Professional & scientific | 2026 |
| Full Logistic Ltd | Wholesale & retail | 2016 |
| Full Parks Limited | Real estate | 2017 |
| Full Property Services Limited | Extraterritorial | 2007 |
| Fullers Meadow (Wantage) Management Company Limited | Households | 2019 |
| Fulneck Court Flat Management Company Limited | Real estate | 2004 |
| Functional Fragrances Ltd | Wholesale & retail | 2011 |
| Fund for Global Human Rights UK | Other services | 2013 |
| Fundamental Studios Clothing Ltd | Wholesale & retail | 2023 |
| Fundatia Adept Ltd | Agriculture & fishing | 2006 |
| Funfordogs Limited | Other services | 2012 |
| Funkofusion Limited | Wholesale & retail | 2026 |