| Framingham House Holdings Limited | Financial services | 2020 |
| Framingham House Investments Limited | Real estate | 1985 |
| Framlingham MH Ltd | Other services | 2021 |
| Franbos UK Ltd | Hospitality | 2019 |
| Frances Court (Norwich) Limited | Households | 2003 |
| Francesca Healthcare Limited | Health & social care | 2023 |
| Francesca Smith Psychological Therapies Limited | Health & social care | 2023 |
| Francesco Elia Services Limited | Professional & scientific | 2015 |
| Francesco Sabatino Ltd. | Health & social care | 2022 |
| Franchise Investments and Developments Limited | Administrative & support | 2002 |
| Franchise Matchmaking Services Limited | Professional & scientific | 2021 |
| Franchise Recruitment Services Limited | Professional & scientific | 2006 |
| Franchise Supermarket Limited | Administrative & support | 2015 |
| Francis Darrah Surveyors Limited | Professional & scientific | 2002 |
| Francis L James and Partners Ltd | Financial services | 2017 |
| Francis Valeting Ltd | Extraterritorial | 2021 |
| Franco Care Ltd | Health & social care | 2022 |
| Frank Dale Foods Ltd | Extraterritorial | 2019 |
| Frank Rycroft Associates Limited | Professional & scientific | 2010 |
| Frank Spurgeon Limited | Agriculture & fishing | 1964 |
| Frankie & James Consultancy Ltd | Construction | 2024 |
| Franks & Associates Ltd | Professional & scientific | 2020 |
| Frary Financial Planning Limited | Financial services | 2013 |
| Fraser Maintenance Limited | Construction | 2012 |
| Fratello Property Holdings Limited | Real estate | 2024 |
| Fratello Property Limited | Real estate | 2024 |
| Frazer Tattoo Ltd | Other services | 2023 |
| Frazers Court Management Limited | Households | 2010 |
| FRD Consulting Ltd | Professional & scientific | 2025 |
| Fredam Homes Ltd | Households | 2024 |
| Freddie Cann Limited | Extraterritorial | 2002 |
| Freddy Builds Ltd | Construction | 2022 |
| Free Books Campaign CIC | Education | 2021 |
| Free Green Energy Corporation (Solar) Limited | Energy | 2015 |
| Free Green Energy Corporation Limited | Energy | 2010 |
| Freebyrd Properties Ltd | Real estate | 2022 |
| Freeclix Limited | Information & communication | 1999 |
| Freedom Embodied Limited | Health & social care | 2026 |
| Freedom Residential Property Ltd | Households | 2022 |
| Freedom Retreats Ltd | Hospitality | 2026 |
| Freedom Transport Services Limited | Transport & logistics | 2023 |
| Freedom Wellbeing Project CIC | Health & social care | 2022 |
| Freedom Yoga and Retreats Limited | Health & social care | 2017 |
| Freemans Cycles Limited | Wholesale & retail | 2010 |
| Freemanscourt Limited | Professional & scientific | 1921 |
| Freespark Ltd | Construction | 2021 |
| Freestones Coaches Limited | Transport & logistics | 2003 |
| Freeway Southern Limited | Wholesale & retail | 2023 |
| Freeze N Breeze Ltd | Manufacturing | 2025 |
| Freight Labs Limited | Information & communication | 2026 |
| Freightforce Distribution Ltd | Transport & logistics | 1998 |
| Freightforce Ltd | Extraterritorial | 2014 |
| Frelcore Limited | Information & communication | 2013 |
| Fremont Estates Ltd | Real estate | 2025 |
| French Limited | Other services | 2016 |
| Frenchnbullz UK Limited | Other services | 2018 |
| Fresh 2 YOU Limited | Transport & logistics | 2006 |
| Fresh Approach Limited | Wholesale & retail | 2010 |
| Fresh Car Components Ltd | Wholesale & retail | 2024 |
| Fresh Daily Walsall Limited | Wholesale & retail | 2019 |
| Fresh Desh Ltd | Wholesale & retail | 2022 |
| Fresh Fades Barbershop Ltd | Other services | 2024 |
| Fresh Perspective Coaching and Leadership Development Ltd | Professional & scientific | 2024 |
| Fresh POD Limited | Manufacturing | 2006 |
| Fresh Renovations Limited | Real estate | 2026 |
| Fresh Start Enterprises Limited | Health & social care | 2019 |
| Fresh Start Future Enterprises Limited | Administrative & support | 2019 |
| Fresh Start Property Limited | Real estate | 2008 |
| Fresh Trims Norwich Ltd | Other services | 2023 |
| Fresh Xpress Norwich Limited | Wholesale & retail | 2026 |
| Freshbake Norfolk Limited | Manufacturing | 2022 |
| Freshforpandas Limited | Wholesale & retail | 2018 |
| Freshly Maid Laundry (East Anglia) Ltd | Administrative & support | 2024 |
| Freshnspicy Ltd | Hospitality | 2022 |
| Freshstartlee Ltd | Arts & recreation | 2020 |
| Freshways Trading Ltd | Wholesale & retail | 2025 |
| Frettenham Service Station Ltd | Wholesale & retail | 2019 |
| Freyr Fitness Ltd | Arts & recreation | 2024 |
| Friars 577 Limited | Manufacturing | 2008 |
| Fried MEG Ltd | Wholesale & retail | 2024 |
| Friendly Moves Limited | Transport & logistics | 2014 |
| Friendly Touring Group Ltd | Financial services | 2026 |
| Friends of Diva Opera Limited | Professional & scientific | 1999 |
| Friends Therapeutic Community Trust | Health & social care | 2008 |
| Frimbeni Ltd | Manufacturing | 2022 |
| Fringes Limited | Health & social care | 2008 |
| Frisby's College Limited | Education | 2011 |
| Frith & Frost Limited | Professional & scientific | 2022 |
| Frog and Witch Rope Access Ltd | Professional & scientific | 2023 |
| Frogs Hall Management Company Limited | Households | 2004 |
| Frogs London Ltd | Arts & recreation | 2024 |
| From Strategy to Action Ltd | Information & communication | 2015 |
| Frontbench Limited | Administrative & support | 2008 |
| Frontdoor Limited | Real estate | 1993 |
| Frontline Customz Ltd | Administrative & support | 2026 |
| Frontline First AID Training Ltd | Administrative & support | 2019 |
| Frontline Surfacing Ltd | Construction | 2019 |
| Frontline Windows Limited | Manufacturing | 2015 |
| Frost Landscaping Limited | Administrative & support | 2026 |
| Frostbite Services Ltd | Construction | 2025 |