| Fast Food Distribution Ltd | Hospitality | 2023 |
| Fast Track Removals & Services Ltd | Transport & logistics | 2018 |
| Fast Workplace Supplies Limited | Wholesale & retail | 2019 |
| Fast-Accurate-Transparent Accountancy Services Ltd | Professional & scientific | 2025 |
| Fate Pharma Ltd | Health & social care | 2018 |
| Faulkner Smart Solutions Ltd | Wholesale & retail | 2018 |
| Favex Limited | Construction | 2015 |
| Favour Properties Limited | Real estate | 2022 |
| Favourite Properties Ltd | Real estate | 2023 |
| Favourquick Limited | Professional & scientific | 1992 |
| Favourstep Limited | Other services | 2016 |
| Fazakerley Performance Ltd | Health & social care | 2026 |
| FB Surveying Limited | Professional & scientific | 2022 |
| FBL Consultancy Services Limited | Professional & scientific | 2023 |
| FBR Associates Limited | Administrative & support | 2025 |
| FD Cain Ltd | Construction | 2026 |
| FDS Contracting Limited | Construction | 2019 |
| FDS Ducting Limited | Construction | 2024 |
| FDS Group Holdings Limited | Financial services | 2020 |
| FDS Maintenance Limited | Public administration | 2020 |
| Fdsconsult(Uk) Limited | Public administration | 2020 |
| FDX Infosec Limited | Information & communication | 2023 |
| FDX Studios Ltd | Real estate | 2023 |
| Feal Property Ltd | Real estate | 2023 |
| Fedonell Limited | Professional & scientific | 2016 |
| Feet Matters Ltd | Administrative & support | 2008 |
| FEI Shon Ltd | Construction | 2022 |
| Feishon Construction Supplies Ltd | Real estate | 2026 |
| Felbridge Property Ltd | Real estate | 2018 |
| Femate Limited | Administrative & support | 2017 |
| Femely Health Limited | Health & social care | 2025 |
| Femflix Limited | Other services | 2022 |
| Fenn Bell Management Company (Kent) Limited | Households | 2025 |
| Fentons Granite and Glass Limited | Construction | 2016 |
| Fernbank Properties Limited | Real estate | 1999 |
| Ffatoba Global Concept Limited | Transport & logistics | 2025 |
| FFC PVT Ltd | Real estate | 2020 |
| Fibercast Ltd | Construction | 2014 |
| Fibremen Ltd | Information & communication | 2023 |
| Fidelis Consulting Limited | Information & communication | 2012 |
| Fiduspal Ltd | Professional & scientific | 2026 |
| Field and Grant Limited | Professional & scientific | 2015 |
| Fighting PIG Ltd | Manufacturing | 2023 |
| Filbrit Connect Ltd | Arts & recreation | 2025 |
| Filipneteyam Ltd | Transport & logistics | 2025 |
| Filmer Farms Limited | Agriculture & fishing | 2008 |
| Filston Apartments Ltd | Construction | 2022 |
| Filston Road Apartments Ltd | Real estate | 2026 |
| Filter Creative Limited | Administrative & support | 2006 |
| Finally-Decent Ltd | Construction | 2025 |
| Finance Kitchen Asset Management Limited | Professional & scientific | 2025 |
| Finance Kitchen Limited | Financial services | 2011 |
| Financescrip Ltd | Professional & scientific | 2020 |
| Fine Line Productions Ltd | Arts & recreation | 2011 |
| Finesight Aluminium Limited | Manufacturing | 2019 |
| Finest Fruit and Vegetables Limited | Wholesale & retail | 2019 |
| Fineva Construction Ltd | Construction | 2021 |
| Fingdom Financial Consultants Ltd | Professional & scientific | 2020 |
| Fingdom Global | Other services | 2024 |
| Fingdom Mortgages Ltd | Financial services | 2026 |
| Fingertips Typing Services Limited | Administrative & support | 2009 |
| Finquay Consulting Ltd | Information & communication | 2017 |
| Fins Logistics Limited | Transport & logistics | 2018 |
| Finscope Consulting Limited | Administrative & support | 2020 |
| Finsure Consultants Limited | Professional & scientific | 2025 |
| Finsure Holdings Limited | Real estate | 2019 |
| Finverex Technologies Ltd | Professional & scientific | 2026 |
| Fire Armour UK Ltd | Construction | 2017 |
| Fire Design Solutions Limited | Construction | 2002 |
| Fireaway Dartford Ltd | Hospitality | 2020 |
| Firoza Property Limited | Real estate | 2022 |
| First Class House Helpers Limited | Other services | 2018 |
| First Class Management LDN Ltd | Real estate | 2025 |
| First GAS Services LLP | | 2004 |
| First Hands on AI CIC | Education | 2025 |
| First Insite Services Ltd | Construction | 2025 |
| First Place Maintenance Limited | Construction | 2026 |
| First Special Reports Limited | Information & communication | 2015 |
| First Strategic Insight Ltd | Information & communication | 1986 |
| Firstech Limited | Professional & scientific | 2009 |
| Firstplace Electrical Services Limited | Construction | 2018 |
| Firstpoint International Incorporated (UK) Limited | Financial services | 2023 |
| Firstpoint Mercantile (EU) Ltd | Financial services | 2023 |
| Firstpoint Mercantile (UK) Ltd | Financial services | 2023 |
| Fish & Chip Bite Ltd | Hospitality | 2025 |
| Fish Shack & Take Away Ltd | Wholesale & retail | 2015 |
| Fit EM in Ltd | Wholesale & retail | 2025 |
| Fit MAX Global Ltd | Wholesale & retail | 2022 |
| Fits People Ltd | Other services | 2021 |
| Fitzgerald Design Services Limited | Construction | 2010 |
| Five K'S Ventures Ltd | Real estate | 2023 |
| Five K’S Building Maintenance Ltd | Construction | 2023 |
| Five Legend Ltd | Health & social care | 2012 |
| Five Rocks Limited | Wholesale & retail | 2025 |
| Five Roses Property Services Ltd | Construction | 2013 |
| Five Sevens CAB Services Ltd | Administrative & support | 2015 |
| Five Star Recruitment Limited | Administrative & support | 2015 |
| Five Zeefi Ltd | Construction | 2020 |
| FIVE10 Designs Limited | Wholesale & retail | 2025 |
| FIX GAS Ltd | Construction | 2016 |