| Experience Bedfordshire - the Tourism Partnership CIC | Extraterritorial | 2012 |
| Expert Auto Repair Ltd | Wholesale & retail | 2015 |
| Expert Tints & Wraps Ltd | Manufacturing | 2021 |
| Expertease Tuition Ltd | Education | 2016 |
| Expertel Limited | Information & communication | 2002 |
| Exso Online Ltd | Wholesale & retail | 2019 |
| Eyeol U.K. Limited | Health & social care | 2002 |
| Eyes by Zeynep Ltd | Health & social care | 2023 |
| Eyes Green Limited | Manufacturing | 2024 |
| EZ Support Services Ltd | Health & social care | 2014 |
| EZE Ltd | Wholesale & retail | 2011 |
| Ezeilo Estates Ltd | Real estate | 2026 |
| EZY Access Shipping Ltd | Transport & logistics | 2025 |
| EZY Properties Ltd | Real estate | 2023 |
| Ezzha Limited | Wholesale & retail | 2019 |
| F & A.Hill Limited | Wholesale & retail | 1954 |
| F Kelly Builders Ltd | Construction | 2026 |
| F Kenworthy Limited | Real estate | 1939 |
| F&S Services Ltd | Administrative & support | 2025 |
| F.G.F. (Continental) Limited | Wholesale & retail | 1962 |
| F.G.F. Limited | Wholesale & retail | 1954 |
| F.O. Automotive Ltd | Professional & scientific | 2026 |
| FA & FA Properties Limited | Real estate | 2025 |
| FAB Facial Aesthetics Ltd | Other services | 2022 |
| Faber Builders Limited | Construction | 2019 |
| Fabricated & Machined Solutions Ltd | Manufacturing | 2015 |
| Facet Capital Limited | Financial services | 2013 |
| Facilitek Services Limited | Construction | 2025 |
| Factory Arme Products Limited | Wholesale & retail | 2017 |
| Fahm and Co Limited | Other services | 1998 |
| Faifer Ltd | Construction | 2026 |
| Fairfields of Werrington Limited | Wholesale & retail | 2012 |
| Faithinspiresus Ltd | Information & communication | 2024 |
| Faithwalk Homes Limited | Real estate | 2023 |
| Faiyaz & Lucky Limited | Transport & logistics | 2019 |
| Falcon Estates (Aylesbury) Ltd. | Real estate | 2015 |
| Falcon Taxis Ltd | Transport & logistics | 2014 |
| Falcons Investment Group Limited | Real estate | 2019 |
| FAM Popa Dcie Ltd | Transport & logistics | 2022 |
| Family Cottages Ltd | Real estate | 2017 |
| Farley Property Developments Limited | Real estate | 2017 |
| Farmview Estates Ltd | Real estate | 2024 |
| Farmview Group Limited | Real estate | 2022 |
| Farmview Holdings Limited | Financial services | 2025 |
| Farmview Investments Limited | Real estate | 2019 |
| Farndon Trade Limited | Wholesale & retail | 2019 |
| Fasami Properties Ltd | Construction | 2026 |
| Fast DAN Trans Limited | Transport & logistics | 2016 |
| Fast Mover Group Ltd | Financial services | 2021 |
| Fast Mover Tools Limited | Wholesale & retail | 2011 |
| Fast Pace Solution Ltd | Wholesale & retail | 2026 |
| Fastfit Autocare Limited | Wholesale & retail | 2022 |
| FAT Fish Digital Limited | Information & communication | 2013 |
| Fauna Field Management Limited | Real estate | 2024 |
| Faux & Company Accountants Ltd | Professional & scientific | 2023 |
| Fceconstructions Ltd | Construction | 2026 |
| FCL Housing and Properties Limited | Real estate | 2018 |
| Fcmp Ltd | Manufacturing | 2026 |
| Feel Good Houses Limited | Construction | 2016 |
| FEL Utilities Ltd | Construction | 2023 |
| Felament Limited | Construction | 2023 |
| Fenit Holdings Limited | Professional & scientific | 1996 |
| Fenrisulfur Limited | Construction | 2004 |
| Feral Grips Ltd | Administrative & support | 2009 |
| Fertility Support Education LLP | | 2021 |
| Fertility Support Training Ltd | Education | 2017 |
| FES Fire & Security Ltd | Construction | 2019 |
| Fevata Ltd | Wholesale & retail | 2021 |
| Fevata Properties Ltd | Real estate | 2022 |
| Ffls Fitness Limited | Other services | 2019 |
| FG & Birtoc Ltd | Construction | 2021 |
| FG Removals Ltd | Transport & logistics | 2025 |
| FHS4 Consulting Ltd | Information & communication | 2017 |
| Fielden Homes Limited | Construction | 2004 |
| Fiitlab Ltd | Arts & recreation | 2023 |
| Filis Property Management Ltd | Real estate | 2026 |
| Financially Prudent (IFA) Limited | Financial services | 2002 |
| Fine Textiles Limited | Manufacturing | 2006 |
| Finops Culture Ltd | Information & communication | 2024 |
| First Choice Carpets & Flooring Ltd | Construction | 2018 |
| First Class Fire and Security Ltd | Construction | 2021 |
| First Priority Maintenance UK Ltd | Other services | 2016 |
| Fish Master 2019 Ltd | Hospitality | 2019 |
| Fission Legal Consultants Limited | Professional & scientific | 2014 |
| Fit Bootcamp Limited | Education | 2017 |
| Fit Carpenters Ltd | Construction | 2026 |
| Fit-In Interiors Limited | Construction | 2019 |
| Fitbaseuk Personal Training Ltd | Arts & recreation | 2026 |
| Fitnessbase UK Ltd | Arts & recreation | 2019 |
| Fitt Box Ltd | Education | 2021 |
| Five Nines (Contracts) Ltd | Construction | 2025 |
| FIX Cool Refrigeration Ltd | Manufacturing | 2022 |
| FIX4WARDS Ltd | Information & communication | 2015 |
| Fixoria Ltd | Wholesale & retail | 2021 |
| FJA Fashion Ltd | Manufacturing | 2026 |
| Flame Caterers Limited | Hospitality | 2023 |
| Flashdeals Ltd | Wholesale & retail | 2025 |
| Flavara Trading Limited | Hospitality | 2019 |
| Flavor Fiesta Limited | Hospitality | 2024 |
| Fleet Transport Services Ltd | Transport & logistics | 2016 |