| FKA Properties Limited | Real estate | 2024 |
| Flare Healthcare Limited | Health & social care | 2023 |
| Fleetson UK Ltd | Administrative & support | 2022 |
| Flexxy Care Services Limited | Health & social care | 2021 |
| Florence Child Care Ltd | Health & social care | 2023 |
| Florissa Designs Ltd | Wholesale & retail | 2022 |
| Florybeautifulcollections Limited | Wholesale & retail | 2022 |
| Flourishing Pathways Ltd | Professional & scientific | 2026 |
| Flovic UK Ltd | Wholesale & retail | 2014 |
| Flozybee Ventures Ltd | Health & social care | 2018 |
| Fluxtron Limited | Administrative & support | 2024 |
| FLY High Housing Limited | Real estate | 2025 |
| FM Business and Accounting Services Ltd | Professional & scientific | 2016 |
| FN Limited | Extraterritorial | 2007 |
| FN UK Holdings Limited | Administrative & support | 1989 |
| FNH UK Limited | Manufacturing | 1987 |
| Foat Solutions Ltd | Health & social care | 2021 |
| Fode Ventures Limited | Health & social care | 2018 |
| Fokus Group Ltd | Wholesale & retail | 2017 |
| Folacrown Limited | Health & social care | 2013 |
| Foldate Crystal Solutions Limited | Public administration | 2020 |
| Folhope Ltd | Real estate | 2023 |
| Fone Zone Intl Ltd | Wholesale & retail | 2026 |
| Food Treasure-Uk Ltd | Hospitality | 2026 |
| Foodique Ltd | Hospitality | 2020 |
| Footify Partners UK Limited | Financial services | 2023 |
| Forbzy Ltd | Real estate | 2022 |
| Force Painting Solutions Ltd | Construction | 2022 |
| Forco Limited | Construction | 2016 |
| Forco Properties Ltd | Real estate | 2019 |
| Forefront Civil and Building Ltd | Construction | 2010 |
| Forever Green Hydroponics Limited | Wholesale & retail | 2012 |
| Fort Comciales Ltd | Wholesale & retail | 2025 |
| Fort Global Trading Ltd | Wholesale & retail | 2025 |
| Fortiswell Ltd | Construction | 2025 |
| Fortune Trading & Consultancy Ltd | Financial services | 2011 |
| Forum for Sustainable New Venture | Other services | 2014 |
| Forventure Ltd | Professional & scientific | 2024 |
| Fotead Limited | Health & social care | 2012 |
| Fotk Medicals Limited | Health & social care | 2012 |
| Fotk Services Limited | Real estate | 2019 |
| Foundlearn Limited | Education | 2026 |
| Four Roots Group Ltd | Real estate | 2026 |
| Four Stream Consulting Ltd | Professional & scientific | 2016 |
| Foxfield Global Services Ltd | Administrative & support | 2020 |
| Francesca Skinbrand & Sparadise Ltd | Other services | 2025 |
| Frederick Nelson Fine Foods Ltd | Hospitality | 2019 |
| Freight Engineering Company Limited | Water & waste | 1990 |
| Fresh Fragrance Ltd | Wholesale & retail | 2018 |
| Freshasia Foods Ltd | Manufacturing | 2004 |
| Friends Auto Care Ltd | Wholesale & retail | 2026 |
| Frontstaff Limited | Professional & scientific | 2023 |
| Fruce Limited | Wholesale & retail | 2025 |
| Fruit Geek Ltd | Information & communication | 2022 |
| Fruited Lemons Limited | Wholesale & retail | 2022 |
| FS Deliveries Limited | Administrative & support | 2014 |
| FS Green Investments Limited | Real estate | 2020 |
| FSA Property Ltd | Real estate | 2017 |
| FSO Enterprises Ltd | Real estate | 2019 |
| FSS Homes Ltd | Real estate | 2018 |
| Ftllog UK Ltd | Transport & logistics | 2023 |
| FU Waii Limited | Hospitality | 2024 |
| Fuel Oils (Holdings) Limited | Wholesale & retail | 1983 |
| Fuel Oils Enterprises Limited | Wholesale & retail | 2015 |
| Fuel Oils Limited | Extraterritorial | 1996 |
| Full Plate Ltd | Hospitality | 2026 |
| Fumab Limited | Health & social care | 2014 |
| FUN Kidz Childcare Ltd | Health & social care | 2012 |
| Furniture Welling Kent Ltd | Manufacturing | 2011 |
| Fuseina Larry Ltd | Administrative & support | 2024 |
| Fusion Lifts Ltd | Professional & scientific | 2019 |
| Fusion Realty Solutions Ltd | Construction | 2024 |
| Future Drylining Ltd | Construction | 2015 |
| Future Momentum Systems Ltd | Information & communication | 2026 |
| FVA Care Solutions Limited | Health & social care | 2025 |
| G Allegro Van Hire Ltd | Administrative & support | 2025 |
| G Business Consultancy Ltd | Extraterritorial | 2014 |
| G S Bindra Ltd | Construction | 2023 |
| G Sanches Events Ltd | Other services | 2025 |
| G&C Agency Ltd | Construction | 2023 |
| G&J Cairncross Drycleaners Limited | Other services | 2019 |
| G.P.W. Properties Limited | Real estate | 2022 |
| GAD Homes Ltd | Real estate | 2017 |
| GAK Builders Limited | Other services | 2017 |
| Galaxie Estates Limited | Real estate | 2026 |
| Galaxy Homes and Properties Limited | Real estate | 2025 |
| Galaxyway AI Ltd | Information & communication | 2024 |
| Galetó Ltd | Manufacturing | 2024 |
| Gallant Wellness Ltd | Health & social care | 2015 |
| Galoop Ltd | Construction | 2015 |
| Gamen Consultancy Limited | Wholesale & retail | 2018 |
| Gamers Reborn Ltd | Information & communication | 2024 |
| Gangoue Properties Ltd | Real estate | 2021 |
| Gateway Recruitment Agency Ltd. | Health & social care | 2017 |
| Gauranga Consulting Services Limited | Information & communication | 2014 |
| GBM Asset Management Ltd | Households | 2020 |
| GCK Limited | Construction | 2020 |
| GDT Real Estates Limited | Real estate | 2019 |
| Geeks Table Ltd | Information & communication | 2020 |
| Gemanda Ltd | Health & social care | 2019 |