| F&D Transport Limited | Transport & logistics | 2017 |
| F&L Transerv Ltd | Transport & logistics | 2017 |
| F&M Car Sale Ltd | Wholesale & retail | 2019 |
| F&S Plastering Ltd | Construction | 2021 |
| F&Sw LLP | | 2020 |
| F.W.Barker(Farms)Limited | Agriculture & fishing | 1955 |
| F2 Systems Ltd | Arts & recreation | 2021 |
| F2F Limited | Construction | 2026 |
| FA- Multiservice Ltd | Other services | 2025 |
| FAB Transport Solution Ltd | Transport & logistics | 2025 |
| Fabarber Limited | Other services | 2014 |
| Faber Carpentry & Refurbishments Ltd | Manufacturing | 2025 |
| Faber Sett Limited | Administrative & support | 2025 |
| Fabiola-Florentina Nenica Ltd | Construction | 2025 |
| Fable and Femme Ltd | Wholesale & retail | 2025 |
| Fabrica Digital Limited | Information & communication | 2020 |
| FAC Holdings Ltd | Financial services | 2015 |
| Face Productions Ltd | Hospitality | 2025 |
| Facewatch Crime Management Ltd | Administrative & support | 2026 |
| Facewatch International Ltd | Administrative & support | 2017 |
| Facewatch Limited | Administrative & support | 2010 |
| Facilities Resource Management Limited | Real estate | 2012 |
| Factory One (Crowborough) Limited | Real estate | 2025 |
| Facts and Dimensions Limited | Administrative & support | 2006 |
| Fade Zone Barbers Ipswich Ltd | Other services | 2026 |
| Faiers Distillery Ltd | Manufacturing | 2018 |
| Faim Luxury Rentals Limited | Administrative & support | 2025 |
| Faims Property Limited | Real estate | 2018 |
| Fair Trade Coffee Winz China UK Ltd | Wholesale & retail | 2025 |
| Fair Trade Shop Ipswich Limited | Wholesale & retail | 1991 |
| Fairhaven International Holdings Ltd | Financial services | 2021 |
| Fairhaven International Limited | Administrative & support | 2016 |
| Fairlead Property Ltd | Real estate | 2016 |
| Fairmount Trade Ltd | Wholesale & retail | 2023 |
| Fairplay Enterprises Limited | Arts & recreation | 2013 |
| Fairview Farm Enterprises C.I.C. | Health & social care | 2017 |
| Fairydent Ltd | Health & social care | 2020 |
| Faith Property Limited | Real estate | 2020 |
| Falcon Court Limited | Real estate | 1991 |
| Falcon EHS Group Ltd | Professional & scientific | 2026 |
| Falcon Fire and Rescue Limited | Public administration | 2016 |
| Fallows Watch (Little Easton) Management Company Limited | Households | 2024 |
| Fame 24HOUR Care Limited | Health & social care | 2016 |
| Fanco Developments Ltd | Real estate | 2026 |
| Fancy Cleaning Ltd | Other services | 2023 |
| Fanel Andrei Ltd | Transport & logistics | 2018 |
| Fanmi Premye Limited | Financial services | 2023 |
| Fanthom Solutions Ltd | Transport & logistics | 2024 |
| Fantic Limited | Wholesale & retail | 2012 |
| Fapr Global Limited | Real estate | 2023 |
| FAR Design & Build Ltd | Construction | 2025 |
| FAR Racing Ltd | Arts & recreation | 2017 |
| Fara Estates Limited | Real estate | 2021 |
| Faragher Haulage Ltd | Transport & logistics | 2025 |
| Fareye Technologies PVT Ltd | Information & communication | 2021 |
| Fargo Systems Limited | Information & communication | 2002 |
| Farida & Rayan Properties SPV Ltd | Real estate | 2022 |
| Farina Consulting Limited | Information & communication | 1998 |
| Farm Forest Limited | Financial services | 2023 |
| Farm Grange Ltd | Administrative & support | 2022 |
| Farm Machinery Preservation Society Limited | Arts & recreation | 1997 |
| Farmagri Limited | Agriculture & fishing | 2006 |
| Farmer & Co Transport Ltd | Transport & logistics | 2026 |
| Farmgauge Ltd | Information & communication | 2026 |
| Farmonix Ltd | Wholesale & retail | 2021 |
| Farriers Walk (Cheveley) Management Company Limited | Households | 2025 |
| Farthings of Newmarket Limited | Administrative & support | 2002 |
| Faso Banqueting Ltd | Hospitality | 2026 |
| Fast & Safe Recovery Ltd | Other services | 2021 |
| Fast 4 Cleaner Ltd | Administrative & support | 2026 |
| Fast Auto Centre Ltd | Wholesale & retail | 2026 |
| Fast Cabs Ipswich Ltd | Transport & logistics | 2020 |
| Fast Cars Dealer Ltd | Wholesale & retail | 2024 |
| Fast Forward (Video) Limited | Wholesale & retail | 1987 |
| Fast Hand Car Wash Ltd | Other services | 2019 |
| Fast Test Limited | Wholesale & retail | 2004 |
| FAT Toad Games Ltd | Information & communication | 2021 |
| Fatema Export and Import Ltd | Wholesale & retail | 2018 |
| Fatema Pharm Ltd | Professional & scientific | 2016 |
| Fatima Ventures Limited | Hospitality | 2014 |
| Fauji Limited | Real estate | 2023 |
| Faye Greenwood Design Limited | Professional & scientific | 2023 |
| Fayers Consulting Limited | Professional & scientific | 2016 |
| FB London Limited | Wholesale & retail | 2020 |
| FBB Ealing Properties (Freehold) Ltd | Real estate | 2024 |
| FBB Ealing Properties Ltd | Real estate | 2024 |
| FBB Holdings Limited | Financial services | 2019 |
| FBJ & Sons Limited | Health & social care | 2016 |
| Fcfe Property Ltd | Real estate | 2026 |
| FD Traffic Management Limited | Construction | 2025 |
| FDC Transport Limited | Transport & logistics | 2020 |
| FDM Solutions Ltd | Information & communication | 2015 |
| FDS Corporation Limited | Wholesale & retail | 2014 |
| Fearscape Ltd | Arts & recreation | 2026 |
| Featherstone Properties Limited | Real estate | 2017 |
| FED Recycling Ltd | Water & waste | 2020 |
| Feel Free Nutrition Ltd | Wholesale & retail | 2010 |
| Felabration UK Limited | Arts & recreation | 2020 |
| Felgains Group Ltd | Financial services | 2022 |
| Felgains Ltd | Wholesale & retail | 2015 |