| Foxwood Flooring Ltd | Construction | 2010 |
| FP Central London Limited | Extraterritorial | 2015 |
| FP Tech Consulting Ltd | Information & communication | 2021 |
| FR Power Solutions Ltd | Professional & scientific | 2024 |
| Fragrance Click Ltd | Wholesale & retail | 2019 |
| Fragrance Direct (UK) Limited | Other services | 2000 |
| Frainworks Bespoke Joinery Ltd | Manufacturing | 2023 |
| Frame Production Limited | Information & communication | 2013 |
| Frame Weddings Limited | Information & communication | 2018 |
| Framed Fantasies Ltd | Information & communication | 2016 |
| Framed Focus Limited | Real estate | 2001 |
| Franbel Services Limited | Manufacturing | 2019 |
| Frances Stanfield Limited | Education | 2021 |
| Francesca Barnett Limited | Professional & scientific | 2025 |
| Francha Limited | Real estate | 2025 |
| Francotyp-Postalia Limited | Administrative & support | 1989 |
| Frank & Scott Limited | Financial services | 2024 |
| Frank H Electric Ltd | Construction | 2015 |
| Frankie’S Transport Services Ltd | Transport & logistics | 2019 |
| Frankko Ltd | Construction | 2021 |
| Fraser Accounting Limited | Professional & scientific | 2017 |
| Fraser Powertrain Ltd | Professional & scientific | 2020 |
| Frayed Ltd | Wholesale & retail | 2018 |
| Freddie's General Gardening Services Limited | Professional & scientific | 2022 |
| Free House Ideas Limited | Information & communication | 2015 |
| Freedom Account Ltd | Information & communication | 2025 |
| Freedom Lighting and Controls Ltd | Construction | 2025 |
| Freedom Run Ltd | Wholesale & retail | 2026 |
| Freelancer Accountants Limited | Professional & scientific | 2013 |
| Freeman & Harding Limited | Other services | 1992 |
| Freeman White Limited | Transport & logistics | 2019 |
| Freight Master Commercials Ltd | Extraterritorial | 2024 |
| French Classics Limited | Administrative & support | 1999 |
| French Nanny Agency UK Ltd | Households | 2019 |
| Frequency Cleaning Limited | Administrative & support | 2016 |
| Fresh Air Facilities Limited | Energy | 2026 |
| Fresh Air Solutions Limited | Energy | 2025 |
| Fresh and Organic Ltd | Extraterritorial | 2017 |
| Fresh Burnham Barbers Ltd | Other services | 2023 |
| Fresh Service Limited | Transport & logistics | 1968 |
| FRESH3D Ltd | Arts & recreation | 2022 |
| Freshehr Clinical Informatics Ltd | Information & communication | 2014 |
| Freshlab Group Limited | Information & communication | 2017 |
| Freya Health Ltd | Health & social care | 2018 |
| Freya VIN Limited | Real estate | 2022 |
| Friction Energy Ltd | Energy | 2020 |
| Friction Limited | Other services | 2005 |
| Frictionless Trade Services Limited | Transport & logistics | 1984 |
| Friendly Deals Limited | Wholesale & retail | 2012 |
| Friends of Trump UK Limited | Other services | 2022 |
| Friningham Farm Car Sales Ltd | Wholesale & retail | 2018 |
| Frobiz Ltd | Arts & recreation | 2015 |
| Frognal Care Limited | Health & social care | 2021 |
| Frontline Professionals Ltd | Professional & scientific | 2007 |
| Frostflow Systems Ltd | Information & communication | 2026 |
| FRP Advisory LLP | | 2010 |
| Fruition Business Limited | Transport & logistics | 2015 |
| Fry's Fitness Limited | Arts & recreation | 2021 |
| Fseth Ltd | Information & communication | 2020 |
| FT Autos Limited | Wholesale & retail | 2024 |
| FT Highways Limited | Other services | 2023 |
| FT Software Limited | Information & communication | 2018 |
| Ftjc Property Ltd | Real estate | 2021 |
| Ftsl Financial Solutions Limited | Financial services | 2017 |
| Ftsl Properties Limited | Real estate | 2023 |
| Ftsl Ventures Limited | Real estate | 2023 |
| Fufc Business Hub Limited | Real estate | 2026 |
| Fuha Holdings Ltd | Wholesale & retail | 2025 |
| Fujitec UK Limited | Manufacturing | 1982 |
| Fulham & Chelsea PUB Co Ltd | Hospitality | 2025 |
| Full Accounting Services Ltd | Professional & scientific | 2020 |
| Full Point Creative Media Ltd | Manufacturing | 2014 |
| Full Spectrum Properties Limited | Real estate | 2021 |
| Fumpredave Ltd | Health & social care | 2018 |
| Funky Gibbon Ltd | Professional & scientific | 2015 |
| Funky Voices Limited | Arts & recreation | 2009 |
| Funmon Consultants Ltd | Financial services | 2015 |
| Funshine Limited | Health & social care | 2005 |
| Furlong Flooring (Southern) Ltd. | Wholesale & retail | 1992 |
| Furnis London Ltd | Construction | 2015 |
| Furniture Disposal Services Ltd | Water & waste | 2025 |
| Furniture JUST4U Limited | Wholesale & retail | 2017 |
| Fuse Fiyi Services Ltd | Professional & scientific | 2023 |
| Fushima Ltd | Hospitality | 2025 |
| Fusion Building Developments Limited | Construction | 2018 |
| Futuralyze Limited | Wholesale & retail | 2025 |
| Future Business Systems Limited | Hospitality | 1983 |
| Future Freight Limited | Transport & logistics | 2018 |
| Future Leisure Films Limited | Professional & scientific | 2013 |
| Future Leisure UK Limited | Professional & scientific | 2009 |
| Future Training and Development Ltd | Education | 2025 |
| Future Travel Advisors Ltd | Administrative & support | 2009 |
| Future Travel Corp Ltd | Hospitality | 2019 |
| Future Vision Tech Ltd | Information & communication | 2024 |
| Futuro Group Limited | Wholesale & retail | 2023 |
| Fuzion Hair Salon Dartford Limited | Other services | 2018 |
| FVP Holdings Limited | Financial services | 2019 |
| FW International Consultancy Ltd | Real estate | 2014 |
| G & a Building Services Limited | Construction | 2008 |
| G & D Heating Contractors Limited | Construction | 2011 |