| Flexx Pilates Ltd | Arts & recreation | 2025 |
| Flexy Living Ltd | Wholesale & retail | 2023 |
| Flirt Cafe Ltd | Hospitality | 2021 |
| Flirt Catering Ltd | Administrative & support | 2019 |
| Flit Holdings Limited | Financial services | 2023 |
| FLM Communications Ltd | Information & communication | 2013 |
| Floareapop Limited | Hospitality | 2021 |
| Floating Buffalo Ltd | Information & communication | 2019 |
| Floating Buffalo Ventures Ltd | Agriculture & fishing | 2025 |
| Flog UK Ltd | Professional & scientific | 2001 |
| Floodmate Limited | Construction | 2016 |
| Floor Team Industrial Limited | Construction | 2008 |
| Floral 2ND Imports Ltd | Wholesale & retail | 2024 |
| Flordeasoka UK Ltd | Wholesale & retail | 2025 |
| Florence House Freehold Limited | Households | 2015 |
| Florence Housing Limited | Real estate | 2006 |
| Florence LE Ltd | Other services | 2021 |
| Flourish Wealth Ltd | Financial services | 2021 |
| Flovi Limited | Manufacturing | 2022 |
| Flow Performance Automotive Ltd | Wholesale & retail | 2021 |
| Flow Radar Limited | Wholesale & retail | 2026 |
| Flow Reformer Poole Ltd | Arts & recreation | 2026 |
| Flowbird Smart City UK Limited | Administrative & support | 2003 |
| Flowbird Transport Limited | Manufacturing | 1975 |
| Flower Computers Ltd | Wholesale & retail | 2014 |
| Flowers at 166 Ltd | Wholesale & retail | 2020 |
| Flowers Blossom Limited | Wholesale & retail | 2025 |
| Flowers in the Rainbow Ltd | Wholesale & retail | 2024 |
| Flowers Valley Developments Limited | Real estate | 2017 |
| Flowsync Solutions Ltd | Manufacturing | 2023 |
| Fluffworks Limited | Information & communication | 2026 |
| Fluid Clothing Ltd | Wholesale & retail | 2009 |
| Flush Advertising Limited | Professional & scientific | 2014 |
| Flux Store Limited | Wholesale & retail | 2025 |
| Fluxra Ltd | Manufacturing | 2025 |
| FLY Baby (Dorset and Wiltshire) LP | | 2012 |
| FLY Comfies Limited | Other services | 2025 |
| Flying LAP Limited | Real estate | 2022 |
| Flying Umbrella Limited | Professional & scientific | 2013 |
| FMB Cleaning Contractors Ltd | Administrative & support | 2023 |
| FMR Sport Limited | Professional & scientific | 2016 |
| Focaccia Partenopea Ltd | Hospitality | 2025 |
| Focal Software Ltd. | Information & communication | 2017 |
| Focalix Media Ltd | Information & communication | 2025 |
| Focus Options Limited | Administrative & support | 2025 |
| Focus Property Solutions Ltd | | 2010 |
| Focused Philanthropy Limited | Professional & scientific | 2009 |
| FOH BOH Limited | Information & communication | 2025 |
| Foilborne Limited | Arts & recreation | 2018 |
| Folkish Press Ltd | Information & communication | 2022 |
| Follow Frank Ltd | Administrative & support | 2020 |
| Folo Ventures Ltd | Real estate | 2017 |
| Fone World UK Limited | Wholesale & retail | 2012 |
| Fonosphere Ltd | Wholesale & retail | 2025 |
| Fontanelle Ltd | Health & social care | 2023 |
| Food and Beverage Expert Limited | Wholesale & retail | 2024 |
| Food Heaven Poole Limited | Hospitality | 2019 |
| Food Safety First Limited | Professional & scientific | 2019 |
| Food Tribe Events & Concessions Limited | Hospitality | 2026 |
| Food Tribe Limited | Hospitality | 2023 |
| Foodzo Ltd | Information & communication | 2025 |
| Foolish Ltd | Information & communication | 2025 |
| Foot in Limited | Administrative & support | 2015 |
| Foot on the Ladder Ltd. | Construction | 2017 |
| Footbus Ltd | Information & communication | 2020 |
| Footycam Ltd | Arts & recreation | 2024 |
| FOR Generations Ltd | Wholesale & retail | 2025 |
| Forager Investments Limited | Agriculture & fishing | 2021 |
| Force Property Management Limited | Households | 2018 |
| Forces Wives Challenge CIC | Other services | 2019 |
| Ford Anglia 105E Owners' Club Limited | Other services | 1992 |
| Ford Anglia 105E Spares Limited | Other services | 1996 |
| Fordingbridge Clinic Ltd | Health & social care | 2016 |
| Forecastle Developments Ltd | Construction | 2019 |
| Forecourt Ltd | Administrative & support | 2020 |
| Forelle Estates (Hurn) Limited | Construction | 2021 |
| Forelle Estates Limited | Construction | 1963 |
| Forelle Group Limited | Professional & scientific | 2018 |
| Forelle Limited | Real estate | 2024 |
| Foreshore Services Ltd | Professional & scientific | 2020 |
| Foresight Homes Ltd | Extraterritorial | 2023 |
| Foresight Security Ltd | Construction | 2020 |
| Forest Edge Care Home Limited | Health & social care | 2013 |
| Forest Edge Kart Club Ltd | Arts & recreation | 1996 |
| Forest Firefly Limited | Real estate | 2021 |
| Forest Gate (Ringwood) Management Ltd | Real estate | 2010 |
| Forest Mill Limited | Extraterritorial | 2014 |
| Forever Phoenix Property Group Ltd | Real estate | 2025 |
| Foreverlife Events Ltd | Other services | 2018 |
| Forexbee Ltd | Wholesale & retail | 2021 |
| Forgetmenotstoreuk Ltd | Wholesale & retail | 2026 |
| Forlet Homes Limited | Real estate | 2023 |
| Form Automation Robotics Ltd | Manufacturing | 2012 |
| Form Estates Ltd | Manufacturing | 2001 |
| Form-It-All Limited | Construction | 1992 |
| Formatting Printed Ltd | Information & communication | 2017 |
| Forrester Management Services Limited | Other services | 2011 |
| Fortec Trading Ltd | Wholesale & retail | 2014 |
| Fortigra Limited | Information & communication | 2014 |
| Fortis Protection Ltd | Administrative & support | 2022 |