| Feickert UK Limited | Manufacturing | 2025 |
| Felicia Nail Ltd | Other services | 2023 |
| Fellowbridge Homes Limited | Real estate | 2025 |
| Fellows Accountants Limited | Professional & scientific | 2014 |
| Fellows Consultants Limited | Professional & scientific | 2002 |
| Fellows Developments Limited | Construction | 2023 |
| Fellows Financial Planning Ltd | Professional & scientific | 2020 |
| Fellows Group Limited | Professional & scientific | 2015 |
| Fellows Healthcare Recruitment Limited | Administrative & support | 2014 |
| Fellows Training Limited | Information & communication | 2016 |
| Fellox Properties Limited | Real estate | 2022 |
| Fells & Fleece Ltd | Wholesale & retail | 2025 |
| Fellsouth Limited | Real estate | 1999 |
| Felrika Ltd | Information & communication | 2008 |
| Felsunny Technology Ltd | Wholesale & retail | 2022 |
| Female Bootcamp Ltd | Health & social care | 2017 |
| Femco Limited | Wholesale & retail | 1992 |
| Femi Precious and Friends Chorale Ltd | Arts & recreation | 2026 |
| Fenavia Solutions Ltd | Professional & scientific | 2024 |
| Fendsol Ltd | Professional & scientific | 2024 |
| Fenella UK Limited | Wholesale & retail | 2013 |
| Fenris Logistics Limited | Transport & logistics | 2008 |
| Fentiman Legal Ltd | Financial services | 2020 |
| Fenton Developments Ltd | Construction | 2020 |
| Ferko Trading Ltd | Wholesale & retail | 2025 |
| Fern Manufacturing Group Limited | Professional & scientific | 2008 |
| Fern Plastic Products Limited | Manufacturing | 1959 |
| Ferringdon Ltd | Real estate | 2024 |
| Ferry Builder Ltd | Other services | 2023 |
| Fertibucks Services Ltd | Health & social care | 2025 |
| Festival Events (Shropshire) Limited | Hospitality | 2023 |
| Fevo Gentz Barber Ltd | Other services | 2025 |
| FEZ Rentals Ltd | Households | 2024 |
| FFF Calvin James Limited | Arts & recreation | 2025 |
| FFJ Group Ltd | Construction | 2024 |
| Ffps Valves & Fittings Ltd | Manufacturing | 2025 |
| Fftc Holdings Limited | Real estate | 2024 |
| FG Newswire Ltd | Information & communication | 2026 |
| FGS Property Solutions Ltd | Real estate | 2025 |
| FH Property Development and Construction Limited | Construction | 2022 |
| FI HQ Ltd | Professional & scientific | 2024 |
| FI Property Limited | Real estate | 2019 |
| FI Real Competitions Limited | Arts & recreation | 2026 |
| Fibreglide Limited | Manufacturing | 1998 |
| Fiction and Fairy Lights Limited | Wholesale & retail | 2026 |
| Fida International Ltd | Manufacturing | 2025 |
| Fidelis Tutores Ltd | Education | 2024 |
| Fidelity Healthcare Services Limited | Real estate | 2016 |
| Field Network Solutions Ltd | Information & communication | 2025 |
| Field Tech Technologies Ltd | Information & communication | 2025 |
| Fifth Avenue Community Shop CIC | Wholesale & retail | 2025 |
| Fifty Scents Ltd | Wholesale & retail | 2024 |
| Fight Club: Pro Ltd. | Arts & recreation | 2017 |
| Fighting Cocks Builders Ltd | Water & waste | 2018 |
| Fighting Cocks Supermarket Ltd | Wholesale & retail | 2023 |
| Fightlinx Limited | Information & communication | 2025 |
| Filed IT Limited | Information & communication | 2025 |
| Film by Soham Ltd | Information & communication | 2024 |
| Filmix Ltd | Information & communication | 2025 |
| Fimed Limited | Health & social care | 2023 |
| Fin's Bins Ltd | Water & waste | 2025 |
| Final Piece Care Limited | Health & social care | 2024 |
| Final Touch Groundworks Ltd | Construction | 2021 |
| Finance 4 Kids Ltd | Education | 2017 |
| Finance Buddy Ltd | Information & communication | 2023 |
| Finance Buddy Technology Ltd | Information & communication | 2023 |
| Financial Consultancy Ltd | Real estate | 2024 |
| Financial Style Limited | Education | 2020 |
| Finaviacom Limited | Transport & logistics | 2008 |
| Finawell Advisory Limited | Wholesale & retail | 2026 |
| Fincalumka Limited | Wholesale & retail | 2025 |
| Finchfield Distribution Service Limited | Transport & logistics | 2005 |
| Finchfield Furniture Ltd | Wholesale & retail | 2024 |
| Finchfield Glass & Glazing Limited | Construction | 2006 |
| Finchfield Properties Limited | Real estate | 2023 |
| Finchfield Roses Limited | Professional & scientific | 1997 |
| Find Group Ltd | Administrative & support | 2024 |
| Findalocum Ltd | Health & social care | 2023 |
| Findmyholidays Ltd | Administrative & support | 2026 |
| Findmypub.Com Ltd | Hospitality | 2009 |
| Finess Developments Co Ltd | Real estate | 2019 |
| Finesse Army Limited | Wholesale & retail | 2023 |
| Finest Feet Ltd | Health & social care | 2024 |
| Finishing Touch Creations Limited | Manufacturing | 2026 |
| Finlook Limited | Wholesale & retail | 2024 |
| Finndian Holdings Limited | Real estate | 2019 |
| Finnexus Business Finance Ltd | Financial services | 2025 |
| Finnexus Ltd | Professional & scientific | 2023 |
| Finsbridge Subco 1 Ltd | Financial services | 2021 |
| Fintelligence Ltd | Professional & scientific | 2007 |
| Finton Limited | Real estate | 2005 |
| Finzbro Consultancy Ltd | Health & social care | 2025 |
| FIR Lane Electrical Limited | Construction | 2021 |
| Fire & Compliance Ltd | Public administration | 2024 |
| Firefeast Limited | Hospitality | 2025 |
| Firefeastkebab Limited | Hospitality | 2025 |
| Firefly Automatix, Limited | Wholesale & retail | 2022 |
| Firelights Corp Ltd | Arts & recreation | 2023 |
| Firewalker Group Limited | Financial services | 2024 |
| Firmswitch Ltd | Administrative & support | 2012 |