| Football-Pad Holdings Ltd | Financial services | 2019 |
| Footing Bricky Ltd | Construction | 2025 |
| Footlights Limited | Arts & recreation | 2007 |
| Fooyes Ltd | Information & communication | 2025 |
| FOR Martial Artists Ltd | Information & communication | 2023 |
| For-Jan Ltd | Energy | 2015 |
| Forbidden Sound Limited | Wholesale & retail | 2022 |
| Forcellati Developments Ltd | Real estate | 2016 |
| Forcious Estates Ltd. | Real estate | 2021 |
| Fordlive Ltd | Information & communication | 2018 |
| Fords of Stamford Ltd | Construction | 2015 |
| Forefront Distribution Ltd | Wholesale & retail | 2023 |
| Foreman & Hobbs Limited | Real estate | 2017 |
| Foreman Property Investment Limited | Households | 2014 |
| Forensic Accounting Solutions Ltd | Professional & scientific | 2013 |
| Forensic Video Services Limited | Information & communication | 2003 |
| Forest Environmental Surveys Limited | Construction | 2009 |
| Forest Facility Ltd | Administrative & support | 2017 |
| Forest Motors (Cambs) Ltd | Wholesale & retail | 2025 |
| Forest Property Management Ltd | Real estate | 2025 |
| Forever & Never Ltd | Information & communication | 2021 |
| Forgaard Agency Limited | Professional & scientific | 2022 |
| Forge Estates Limited | Construction | 2025 |
| Forge Wood (Crawley) Management Company Limited | Households | 2014 |
| Forklift Training Peterborough Ltd | Administrative & support | 2021 |
| Formalfit Tailoring and Medal Mounting Ltd | Manufacturing | 2026 |
| Formalfit Tailoring Limited | Manufacturing | 1991 |
| Forman Media Group Ltd | Professional & scientific | 2026 |
| Formation Developments (Oxney Road) Ltd | Real estate | 2019 |
| Formation Developments Limited | Construction | 2017 |
| Formation Fire Door's Ltd | Manufacturing | 2025 |
| Formula Service Centre Ltd | Wholesale & retail | 2021 |
| Forshaws Davies Ridgway LLP | | 2004 |
| Forster Day Nurseries Ltd | Education | 2019 |
| Forster Property & Leisure Ltd | Arts & recreation | 2012 |
| Forster's Engineering Services Ltd | Other services | 2019 |
| Fort Halstead (Beckman Close) Residents Company Limited | Households | 2026 |
| Forte Consulting Emea Limited | Professional & scientific | 2024 |
| Forthbank Consulting Limited | Professional & scientific | 2024 |
| Forti Insieme Ltd | Real estate | 2023 |
| Fortify INS Ltd | Financial services | 2016 |
| Forton Automotive Limited | Wholesale & retail | 2015 |
| Fortresec Consulting Ltd | Information & communication | 2019 |
| Fortrey Ltd | Real estate | 2023 |
| Fortuna ED Ltd | Administrative & support | 2026 |
| Fortune Electrical Ltd | Construction | 2024 |
| Fortune Valley Limited | Wholesale & retail | 2018 |
| Foryou Logistics Ltd | Transport & logistics | 2024 |
| Forza Alfa Ltd | Information & communication | 2012 |
| Forza Auto Centre Ltd | Other services | 2018 |
| Forza Consultants Limited | Arts & recreation | 2012 |
| Forza Enterprises Limited | Arts & recreation | 2018 |
| Foster Brickwork Services Ltd | Construction | 2026 |
| Foster's Design Ltd | Professional & scientific | 2025 |
| Fosters Barber Shop Limited | Other services | 2011 |
| Fosview Developments Limited | Construction | 2019 |
| Fotheringhay Christmas Trees Limited | Wholesale & retail | 2018 |
| Foulkes Terrace (Aldershot) Residents Company Limited | Households | 2009 |
| Foundation Site Investigation Limited | Construction | 2009 |
| Foundry Intl. Ltd | Professional & scientific | 2022 |
| Fountain of Celebration Ministries | Other services | 2016 |
| Four CS MAT | Public administration | 2010 |
| Four J and a Limited | Health & social care | 2015 |
| Four Seasons Developments and Acquisitions Limited | Professional & scientific | 2019 |
| Four Swift Close Ltd | Real estate | 2023 |
| Fourie Medical Ltd | Professional & scientific | 2019 |
| Fourteen Forty-One Ltd | Financial services | 2024 |
| Fourthroot Data Solutions Ltd | Information & communication | 2025 |
| Fowlmere Road Development Ltd | Construction | 2025 |
| FOX Auto Services Ltd | Wholesale & retail | 2019 |
| FOX Brewing Ltd | Manufacturing | 2025 |
| FOX IS Consultants Limited | Information & communication | 2014 |
| FOX Waste Water Services Limited | Water & waste | 2010 |
| Foxglove View Buckland Brewer Management Company Limited | Households | 2022 |
| Foxgloves and Wolfe Ltd | Professional & scientific | 2024 |
| Foxy NL Limited | Transport & logistics | 2025 |
| FPD (Cambs) Ltd | Professional & scientific | 2015 |
| FQ Partners Ltd | Wholesale & retail | 2025 |
| FRA Bidco Limited | Financial services | 2025 |
| FRA Topco Limited | Financial services | 2025 |
| Fractional Wisdom Ltd | Information & communication | 2026 |
| Fragile Earth Solutions Ltd | Administrative & support | 2022 |
| Fragrance Fusions Ltd | Manufacturing | 2023 |
| Frames 2 Trade Ltd | Manufacturing | 2023 |
| Frampton Gate Residents Management Company Limited | Households | 2020 |
| Fran Trans Ltd | Administrative & support | 2015 |
| Francave Company Ltd | Extraterritorial | 2024 |
| Francesco Siviglia Limited | Transport & logistics | 2016 |
| FRANCHISE61 Ltd | Hospitality | 2019 |
| Francis Signature Health Limited | Health & social care | 2025 |
| Frandot World Ltd | Transport & logistics | 2025 |
| Frank and Josie Ltd | Information & communication | 2023 |
| Frank Bird Promotions Ltd | Arts & recreation | 2024 |
| Frank Commercial Services Limited | Real estate | 2014 |
| Frank Lake Ltd | Real estate | 2025 |
| Frank Modern Lettings Limited | Real estate | 2023 |
| Frank Richardson & SON Limited | Agriculture & fishing | 1951 |
| Frankgates Limited | Hospitality | 2016 |
| Franks Autos Limited | Wholesale & retail | 2016 |
| Franvic Limited | Hospitality | 2026 |