| Forgeclean Services Ltd | Administrative & support | 2025 |
| Forged Roofing Limited | Construction | 2026 |
| Forinvest Technologies Ltd. | Information & communication | 2023 |
| Formarks Limited | Construction | 2016 |
| Former BUS Depot Limited | Financial services | 2026 |
| Formula Machining Limited | Manufacturing | 2015 |
| Forno Volante Ltd | Hospitality | 2026 |
| Forshaw Design Limited | Professional & scientific | 2005 |
| Fortey FAM Ltd | Construction | 2012 |
| Fortis DPC Limited | Professional & scientific | 2018 |
| Fortitude Dynamics Group Limited | Professional & scientific | 2017 |
| Fortitude Dynamics Limited | Professional & scientific | 2015 |
| Fortress Plumbing & Heating Limited | Construction | 2023 |
| Fortuni Cafe Ltd | Hospitality | 2026 |
| Forum Onshore Limited | Professional & scientific | 2017 |
| Forward Thinking Finance Ltd | Professional & scientific | 2013 |
| Forward.Place Ltd | Information & communication | 2024 |
| Foshar Consultancy Ltd | Information & communication | 2013 |
| Fossen Ltd | Construction | 2015 |
| Foster Consulting Limited | Real estate | 2011 |
| Found West Malling Trading AS Faded Angel Limited | Wholesale & retail | 2014 |
| Founding Teams Limited | Financial services | 2023 |
| Fountain Centre Services Limited | Health & social care | 2015 |
| Four Corners Wine Company Limited | Wholesale & retail | 2015 |
| Four Counties Thatching Limited | Construction | 2013 |
| Four Service Limited | Manufacturing | 2012 |
| Fourbyfive Ltd | Professional & scientific | 2022 |
| Fourfre Ltd | Financial services | 2020 |
| Fourhalls Limited | Construction | 2020 |
| Fourth Base Marketing Ltd | Information & communication | 2023 |
| Fourth Weybrook Residents Association (Guildford) Limited | Households | 1990 |
| Fourtre Ltd | Financial services | 2020 |
| Fourwheels HG Limited | Professional & scientific | 1960 |
| FOX 17 Limited | Professional & scientific | 2020 |
| FOX 71 Capital Ltd | Professional & scientific | 2025 |
| FOX Haulage Limited | Transport & logistics | 2024 |
| FOX Marketing Services Limited | Information & communication | 1997 |
| FOX Red Aviation Ltd | Manufacturing | 2023 |
| Foxball Limited | Manufacturing | 2023 |
| Foxbury Holdings (Shire House) Limited | Administrative & support | 2017 |
| Foxenden House Residents Association Limited | Households | 1982 |
| Foxfuelled Ltd | Professional & scientific | 2018 |
| FP Interconsult Limited | Professional & scientific | 2020 |
| Fractional First UK Ltd | Real estate | 2010 |
| Frame by Frame Ltd | Information & communication | 2011 |
| Framing Castle & Art Gallery Ltd | Wholesale & retail | 2021 |
| Frances Properties Ltd | Real estate | 2019 |
| Frank Dale & Stepsons Limited | Wholesale & retail | 2004 |
| Frank Dawson Limited | Information & communication | 2012 |
| Fraser Consulting (Guildford) Limited | Professional & scientific | 2009 |
| Fraser IT Consulting Ltd | Information & communication | 2008 |
| Fraser Yachts Limited | Administrative & support | 2009 |
| FRD UK Limited | Arts & recreation | 2016 |
| Frdt Ltd | Arts & recreation | 2025 |
| Free to Perform IT Services Ltd | Information & communication | 2009 |
| Freedom OPS Ltd | Administrative & support | 2025 |
| Fresco Delikafessen Ltd | Wholesale & retail | 2017 |
| Fresh Conti Limited | Wholesale & retail | 2011 |
| Fresh Start Children's Media Ltd | Information & communication | 2019 |
| Fresh Start Media Ltd | Information & communication | 2017 |
| Freshomes Ltd | Administrative & support | 2023 |
| Friary Subway Ltd | Hospitality | 2017 |
| Friday Street Interiors Limited | Professional & scientific | 2021 |
| Friend to the END Limited | Health & social care | 2025 |
| Friends of Tacugama | Other services | 2013 |
| Frigid Ltd | Real estate | 2023 |
| Frimley Ultrasound & Medical Training Ltd | Education | 2019 |
| Frogspawn Creative Limited | Information & communication | 2007 |
| Frogspawn Film Limited | Other services | 2013 |
| Frontdesk Queue Management Solutions (UK) Limited | Information & communication | 2020 |
| Frontlight Interiors Limited | Real estate | 1981 |
| Frosburys Limited | Wholesale & retail | 2005 |
| Frosty Dog Games Ltd | Information & communication | 2025 |
| Froyle Park Limited | Hospitality | 2012 |
| Fruitful Work | Other services | 2025 |
| Frère ET Soeur Limited | Professional & scientific | 2024 |
| FS Park Management NO.1 GP Limited | Financial services | 2021 |
| FS Park Management NO.2 GP Limited | Financial services | 2021 |
| FS Park Renewables 1 LLP | | 2021 |
| FS Park Renewables 2 LLP | | 2021 |
| FSB Fabrications Ltd | Construction | 2021 |
| FTL Software Limited | Information & communication | 2025 |
| Fulk Bros Limited | Wholesale & retail | 2016 |
| Full Moon Publications Limited | Information & communication | 2020 |
| Full Stack Industries Ltd | Information & communication | 2019 |
| Fullbrook Ventures Limited | Professional & scientific | 1999 |
| Fuller Tyres Limited | Wholesale & retail | 2009 |
| Fullpwr Studio Ltd | Wholesale & retail | 2019 |
| Fullstride Accounting Limited | Professional & scientific | 2025 |
| Fulshire Limited | Real estate | 2014 |
| FUN Blue Bits Ltd | Information & communication | 2016 |
| Fundamental Games Limited | Information & communication | 2013 |
| Funktion One Limited | Administrative & support | 2011 |
| Funktion One Research Limited | Administrative & support | 1998 |
| Funky Beats Ltd | Arts & recreation | 2026 |
| Funnelhive Limited | Professional & scientific | 2024 |
| Funny Developments, LLP | | 2017 |
| Fuoriporto Limited | Hospitality | 2023 |
| Furniturelink | Wholesale & retail | 2010 |
| Fusion Building Consultancy Guildford Limited | Professional & scientific | 2009 |