| Extraquick Transport Limited | Transport & logistics | 1991 |
| Extrudaseal Limited | Extraterritorial | 2011 |
| EYE 2 EYE Limited | Administrative & support | 2001 |
| EYE Clinic Barot Limited | Wholesale & retail | 2016 |
| EYE Test & Care Ltd | Health & social care | 2008 |
| EYE Track Limited | Construction | 2002 |
| Eye-Kaus Limited | Health & social care | 2013 |
| Eyecare Vision Limited | Other services | 2021 |
| Eyedea Ltd | Real estate | 2020 |
| Eyeframe Ltd | Health & social care | 2004 |
| Eyeful Presentations Limited | Professional & scientific | 2004 |
| Eyeful Presentations Trustees Limited | Administrative & support | 2022 |
| Eyepath Ltd | Professional & scientific | 2026 |
| Eyerx Limited | Health & social care | 2019 |
| Eyes on the Road (Eyecare) Ltd | Health & social care | 2023 |
| Eyes Wide Open Film Productions Ltd | Information & communication | 2026 |
| Eyesha Limited | Health & social care | 2006 |
| EZ Cuttz Limited | Other services | 2018 |
| EZ Energy Solution Ltd | Professional & scientific | 2013 |
| Ezco Limited | Administrative & support | 2025 |
| EZE Chek (UK) Limited | Professional & scientific | 2020 |
| Ezeykey Ltd | Financial services | 2026 |
| Ezine Limited | Hospitality | 2023 |
| Ezomfy Ltd | Wholesale & retail | 2025 |
| Ezra Property Solutions Ltd | Real estate | 2021 |
| Ezrillee Solutions Limited | Information & communication | 2023 |
| Eztyga Limited | Wholesale & retail | 2017 |
| F & J Wholesale Ltd | Wholesale & retail | 2017 |
| F & S Accountancy Limited | Professional & scientific | 2017 |
| F & S Antiques Limited | Wholesale & retail | 2016 |
| F & W Plumbing & Heating Services Limited | Construction | 2013 |
| F & ZEE Commercial Management Limited | Professional & scientific | 2018 |
| F a Gabbar Ltd | Health & social care | 2025 |
| F a Kebab Ltd | Hospitality | 2025 |
| F a Retailing Ltd | Wholesale & retail | 2008 |
| F and K Flooring Ltd | Wholesale & retail | 2025 |
| F Ayub & Co Ltd | Professional & scientific | 2016 |
| F Berdinner Limited | Administrative & support | 2018 |
| F C L C Limited | Construction | 2021 |
| F E S Property Developments Limited | Real estate | 2020 |
| F H Magambo Limited | Health & social care | 2021 |
| F Holdings Ltd | Real estate | 2025 |
| F I Trading Ltd | Wholesale & retail | 2022 |
| F J Fitness Wear Ltd | Information & communication | 2025 |
| F M London Ltd | Construction | 2011 |
| F SZN Ltd | Wholesale & retail | 2021 |
| F W Pickford (Kettering) Limited | Financial services | 2005 |
| F&B Pack Ltd | Administrative & support | 2023 |
| F&F Solutions (Leic) Ltd | Professional & scientific | 2022 |
| F&Fc Holdings Ltd | Financial services | 2026 |
| F&H Property Investments Limited | Real estate | 2022 |
| F&M Catering Limited | Hospitality | 2024 |
| F&M Healthcare (UK) Ltd | Health & social care | 2009 |
| F&S Roofing Limited | Construction | 2020 |
| F&W Holdings Ltd | Financial services | 2019 |
| F&Y Properties Ltd | Real estate | 2019 |
| F&Z Investment Limited | Hospitality | 2022 |
| F. & C.D. Wells Limited | Construction | 1975 |
| F. a. M Healthcare Solutions Ltd | Wholesale & retail | 2009 |
| F. Capua Ltd | Other services | 2020 |
| F.A Retail Group Ltd | Wholesale & retail | 2025 |
| F.C.Measom Limited | Construction | 1960 |
| F.Dee Ltd | Public administration | 2018 |
| F.F. Marble Ltd | Administrative & support | 2004 |
| F.Gozukara Ltd | Transport & logistics | 2021 |
| F.H. Gilman & Co | Manufacturing | 1942 |
| F.I.D Fosse Interior Developments Ltd | Manufacturing | 2023 |
| F.I.M.Trading Ltd | Manufacturing | 2025 |
| F.I.S Constructions Limited | Construction | 2025 |
| F.K. Property Solutions Ltd | Real estate | 2019 |
| F.L.K. Clinical Services Limited | Health & social care | 2013 |
| F.N.F. Investment Limited | Real estate | 2014 |
| F.P. Industrial Limited | Manufacturing | 1988 |
| F.R.R Midlands Ltd | Construction | 2023 |
| F.S Contractors Ltd | Construction | 2025 |
| F.W. Mays & Co. Limited | Wholesale & retail | 1968 |
| F1 Manufacturing Ltd | Manufacturing | 2003 |
| F16 Ltd | Construction | 2024 |
| F2 Property Investments Limited | Real estate | 2016 |
| F21 DJT Limited | Real estate | 2024 |
| F2L Investments Limited | Health & social care | 2022 |
| F3 Property Investments Limited | Real estate | 2018 |
| F5X Transporterx Limited | Transport & logistics | 2016 |
| F7H Fit Club Ltd | Arts & recreation | 2026 |
| FA Midlands Ltd | Professional & scientific | 2025 |
| Faas Ltd | Administrative & support | 2008 |
| Faay Transport Services Ltd | Transport & logistics | 2022 |
| FAB Clothing Ltd | Wholesale & retail | 2023 |
| FAB Prime Spices Limited | Wholesale & retail | 2024 |
| FAB Production and Entertainment Limited | Information & communication | 2020 |
| FAB Transport Ltd | Transport & logistics | 2022 |
| Fabalt Powertools Ltd | Other services | 2020 |
| Faber Design (Leicester) Limited | Professional & scientific | 2019 |
| Faber Group Ltd | Construction | 2019 |
| Faber-Saks Consultants Ltd | Administrative & support | 2015 |
| Faber-Saks Health Care Services Ltd | Health & social care | 2017 |
| Faber-Saks Lettings & Property Management Ltd | Extraterritorial | 2017 |
| Faber-Saks Procurement & Supply Services Ltd | Extraterritorial | 2017 |
| Faber-Saks Security Solutions Ltd | Administrative & support | 2017 |
| Faber-Saks Training Academy Ltd | Extraterritorial | 2017 |