| Four Jays Limited | Other services | 2003 |
| Four Reel Media CIC | Information & communication | 2024 |
| Four Ring Traders Limited | Wholesale & retail | 2024 |
| Four Seasons Fencing Limited | Construction | 2001 |
| Fourmy Media Group Ltd | Professional & scientific | 2020 |
| Fourmy Studio Ltd | Arts & recreation | 2026 |
| FOX & Rowe Ltd | Wholesale & retail | 2023 |
| FOX Framing Limited | Manufacturing | 2017 |
| FOX Hill Lettings Limited | Real estate | 2020 |
| FOX Rail Solutions Ltd | Transport & logistics | 2018 |
| Foxhill (High Halden) Management Company Limited | Households | 2019 |
| Foxley Electrical Ltd | Construction | 2022 |
| Foxley Engineering Ltd | Professional & scientific | 2020 |
| Foxtechrepairs Ltd | Other services | 2026 |
| Foxy Management Ltd | Professional & scientific | 2010 |
| Foxymed Limited | Professional & scientific | 2000 |
| FPS Kent Limited | Construction | 2015 |
| FPT Deluxe Homes Limited | Real estate | 2024 |
| Fractional Operations Limited | Information & communication | 2025 |
| Frag Aviation Limited | Arts & recreation | 2024 |
| Fraim Ltd | Other services | 2024 |
| Framex Carpentry Ltd | Manufacturing | 2026 |
| Fran Excell Limited | Other services | 2017 |
| Frank's Bakery Headcorn Ltd | Wholesale & retail | 2025 |
| Frankie Stachini Ltd | Administrative & support | 2024 |
| Frankie's Food Box Ltd | Hospitality | 2019 |
| Fraser Engineering (UK) Limited | Manufacturing | 2004 |
| Fraser Engineering Limited | Manufacturing | 1996 |
| Fraudpulseai Technologies Limited | Information & communication | 2026 |
| Frazer Composites Ltd | Professional & scientific | 2026 |
| Freathy Lane Management Company Limited | Households | 2001 |
| Fred and Ginger Limited | Construction | 2005 |
| Fred's Bicycle Company Limited | Wholesale & retail | 2021 |
| Freddie's Farm Ltd. | Wholesale & retail | 2014 |
| Frederick Ward Ltd | Professional & scientific | 2023 |
| Free Flowing Plumbing and Heating Ltd | Construction | 2021 |
| Freedom Dance Collective Ltd | Arts & recreation | 2021 |
| Freedom Living Properties Limited | Real estate | 2024 |
| Freedom Living Solutions Ltd | Construction | 2017 |
| Freeman Engineering Services (Kent) Ltd | Construction | 2019 |
| Freeman Properties Kent Ltd | Real estate | 2025 |
| Freight Movement UK Limited | Transport & logistics | 2004 |
| Freight-Link Heathrow Ltd | Transport & logistics | 2014 |
| French Selection UK Limited | Administrative & support | 1997 |
| Fresh & Fast Foods Ltd | Hospitality | 2025 |
| Fresh Beans Ltd | Hospitality | 2011 |
| Fresh Direct (UK) Limited | Wholesale & retail | 1995 |
| Fresh Direct Limited | Professional & scientific | 2015 |
| Fresh Start Crystal Clean Ltd | Administrative & support | 2025 |
| Fresh Start Fruit and VEG Ltd | Wholesale & retail | 2025 |
| Fresh Start Removals and Clearance Ltd | Water & waste | 2025 |
| Fresh Startups Limited | Administrative & support | 2019 |
| FRI Services Ltd | Transport & logistics | 2019 |
| Friars 662 Limited | Administrative & support | 2011 |
| Fridaybox Limited | Professional & scientific | 2013 |
| Fridaysfashion Limited | Professional & scientific | 2017 |
| Friends of Folkestone Academy Ltd | Education | 2004 |
| Friends of Shepherds Bush Green C.I.C. | Professional & scientific | 2022 |
| Frimpy Creations Ltd | Manufacturing | 2019 |
| Fritag Limited | Other services | 2018 |
| Frith Developments Ltd | Construction | 2026 |
| Frith Road Property Group Ltd | Real estate | 2025 |
| From Learning to Earning Ltd | Information & communication | 2020 |
| Frozen Herbs Limited | Manufacturing | 2007 |
| FSF Fencing Supplies Limited | Administrative & support | 2010 |
| FSI Europe Limited | Administrative & support | 2009 |
| FSM Investments Limited | Real estate | 2018 |
| Fstone Construction Ltd | Construction | 2026 |
| Ftech Solutions Ltd | Professional & scientific | 2018 |
| FTI Online Limited | Wholesale & retail | 2022 |
| FTW Safety Ltd | Other services | 2015 |
| FUB Ltd | Administrative & support | 2016 |
| Fuggle Developments Limited | Construction | 2017 |
| Fulcrumtec UK Ltd | Information & communication | 2020 |
| Fulker Developments Limited | Construction | 2024 |
| Fulker Plant Limited | Construction | 2017 |
| Fuller & Jeffree Ltd | Real estate | 2024 |
| Fuller (Corporate) Limited | Financial services | 2011 |
| Fully Charged Limited | Wholesale & retail | 2012 |
| Fume Cupboard Design Ltd | Construction | 2024 |
| Fundamenta Land & Airspace Ltd | Real estate | 2020 |
| Fundamenta LLP | | 2018 |
| Funder Films CIC | Information & communication | 2014 |
| Fungma Limited | Wholesale & retail | 2026 |
| Funtasy Ltd | Wholesale & retail | 2017 |
| Furhg Sawmills Ltd | Manufacturing | 2018 |
| Furnace Solution UK Limited | Administrative & support | 2019 |
| Furnish Art Ltd | Manufacturing | 2025 |
| Furniture Design Services Limited | Wholesale & retail | 2006 |
| Fusion Financial Planning Ltd | Financial services | 2022 |
| Future Dance Ashford Limited | Education | 2022 |
| Future Dance CIC | Education | 2024 |
| Future Designs 247 Limited | Administrative & support | 2024 |
| Future Energy Installations LLP | | 2021 |
| Future Focused HR Ltd | Professional & scientific | 2025 |
| Future JS Limited | Financial services | 2019 |
| Future Packaging Supply Ltd | Wholesale & retail | 2023 |
| Futurecultures Ltd | Hospitality | 2020 |
| Futuristic AV Limited | Real estate | 2015 |
| Futuristicventure Ltd | Professional & scientific | 2019 |