| Forensic Equity Ltd | Professional & scientific | 2010 |
| Forest M.O.T. & Service Centre Ltd. | Wholesale & retail | 1997 |
| Forest Vehicle Body Repair Specialists Limited | Wholesale & retail | 2020 |
| Foretldn Limited | Administrative & support | 2015 |
| Forgeray Limited | Real estate | 2022 |
| Forina Aesthetics Limited | Other services | 2016 |
| Forster Build Ltd | Construction | 2024 |
| Fortiva FM Ltd | Professional & scientific | 2025 |
| Fortknox Cyber Solutions Limited | Information & communication | 2023 |
| Fortune Space Ltd | Hospitality | 2020 |
| Forward Momentum Consulting Limited | Information & communication | 2001 |
| Fotoware UK Ltd | Information & communication | 2021 |
| Found Investments Limited | Other services | 2023 |
| Found Talent Group Limited | Administrative & support | 2023 |
| Found Talent Limited | Administrative & support | 2020 |
| Foundry Gardens (Wokingham) Management Company Limited | Real estate | 2006 |
| FOUNDRY29 Ltd | Manufacturing | 2025 |
| Four Bears Computing Limited | Information & communication | 2018 |
| Four Walls Property Solutions Ltd | Real estate | 2015 |
| Fowlcotes Limited | Construction | 2017 |
| FOX Films Ltd | Information & communication | 2023 |
| FOX Red Creative Ltd | Professional & scientific | 2016 |
| Foxcote Financial Solutions Limited | Professional & scientific | 2011 |
| Foxmoat Consultancy Services Ltd | Information & communication | 2023 |
| Foxmoat Holdings Ltd | Real estate | 2016 |
| Foxmoat Technical Services Ltd | Information & communication | 2016 |
| FQ Locums Ltd | Health & social care | 2018 |
| Fq&S Transport Ltd | Transport & logistics | 2021 |
| Fractional Services Ltd | Information & communication | 2024 |
| Francis Rose Financial Limited | Financial services | 2025 |
| Freddie's Auto's Ltd | Wholesale & retail | 2026 |
| Freehit Sports Limited | Wholesale & retail | 2011 |
| Freemind Mentors Ltd | Health & social care | 2022 |
| FRESH01 Limited | Administrative & support | 2001 |
| Friendly Faces Care Ltd | Health & social care | 2015 |
| Frog Hall Residents' Management Company Limited | Households | 1995 |
| Frontier Biopharma Limited | Financial services | 2021 |
| Frontier Pharma Limited | Professional & scientific | 2016 |
| Frontiera Customs Services Limited | Professional & scientific | 2019 |
| Frost Cleaning Services Limited | Administrative & support | 2025 |
| Frost Optical Services Limited | Manufacturing | 2006 |
| Frostreat Limited | Hospitality | 2025 |
| FRR Consulting Ltd | Professional & scientific | 2021 |
| FRS Engineering Consultancy Limited | Professional & scientific | 2010 |
| Fruk Rugby Ltd | Information & communication | 2025 |
| Fryer Commercial Limited | Real estate | 2010 |
| FSC First Company Ltd | Real estate | 2020 |
| Fstm Holdings Limited | Professional & scientific | 2025 |
| Fswram Ltd | Professional & scientific | 2025 |
| Full Pitch Analytics Ltd | Arts & recreation | 2024 |
| Full Rotation Limited | Extraterritorial | 2011 |
| Fullbrook Window Cleaning Services Limited | Administrative & support | 2022 |
| Funtastic Kids Ltd | Health & social care | 2015 |
| Furnate Ltd | Financial services | 2020 |
| Fusion Learning Limited | Professional & scientific | 2000 |
| Fusion Removals & Logistics Ltd | Other services | 2017 |
| Fussy Bakes Ltd | Wholesale & retail | 2025 |
| Future Family Inheritance Ltd | Professional & scientific | 2025 |
| Future Family Wealth Ltd | Professional & scientific | 2025 |
| Futurewave Accounting Ltd | Professional & scientific | 2024 |
| G & N Superstore Ltd | Wholesale & retail | 2025 |
| G B Construction Services Ltd | Construction | 2009 |
| G Care Planning Limited | Professional & scientific | 2022 |
| G D Public Relations Limited | Other services | 2017 |
| G G Scenic Decor Ltd | Information & communication | 2016 |
| G M Plumbing & Heating Services (Bracknell) Limited | Construction | 2008 |
| G T Field Limited | Financial services | 2023 |
| G&H Lifestyle Ltd | Information & communication | 2018 |
| G-Cubed Ventures Limited | Financial services | 2024 |
| G.A.Brooks Partners Limited | Real estate | 1956 |
| G5 Finance Limited | Professional & scientific | 2013 |
| Gaanavi Partners Limited | Information & communication | 2025 |
| Gabor Plastering Ltd | Construction | 2025 |
| Gabriel's Angels Limited | Health & social care | 2012 |
| Gabriel’S Angels Management Ltd | Administrative & support | 2018 |
| Gadgets LAB Ltd | Wholesale & retail | 2017 |
| Gahan Property Limited | Real estate | 2022 |
| Gain Digital Ltd | Professional & scientific | 2023 |
| Gallius Holdings Limited | Financial services | 2020 |
| GALVEN2017 Ltd | Wholesale & retail | 2017 |
| Gama Pharmed Solutions Limited | Health & social care | 2012 |
| Gana Inc Limited | Real estate | 2024 |
| Gangnath Investment Ltd | Real estate | 2025 |
| Garabyhunt Ltd | Information & communication | 2011 |
| Garden Angels Limited | Other services | 1995 |
| Garden of Dreams Ltd | Information & communication | 2018 |
| Garden ROW Studio Limited | Financial services | 2023 |
| Gardenwaze Ltd | Wholesale & retail | 2024 |
| Gareth Ward Chiropractic Limited | Health & social care | 2015 |
| Garford Services Ltd | Manufacturing | 2003 |
| Gas-It Heating Ltd | Construction | 2018 |
| Gasx Limited | Manufacturing | 2010 |
| Gate House Entertainment Limited | Information & communication | 2014 |
| Gate Software Limited | Wholesale & retail | 2004 |
| Gazelle Estates Limited | Real estate | 2018 |
| GAZSS786 Ltd | Health & social care | 2019 |
| GB Long Logistics Limited | Transport & logistics | 2018 |
| GC Film Services Limited | Construction | 2023 |
| GC Holdings International Ltd | Administrative & support | 2018 |
| GC SPV 1 Limited | Financial services | 2024 |