| Febilos Limited | Real estate | 2025 |
| FEC Group Ltd | Financial services | 2024 |
| FEC Renewables Ltd | Construction | 2022 |
| Feedermasters Limited | Arts & recreation | 2014 |
| Feere Ltd | Wholesale & retail | 2020 |
| Feet Supplies Ltd | Wholesale & retail | 2023 |
| Felsen-Kanzel Limited | Real estate | 2016 |
| Felvus Properties Limited | Administrative & support | 2024 |
| Fely & Sons Transport Ltd | Transport & logistics | 2022 |
| Fenby Projects Limited | Construction | 2021 |
| Fenchurch Partnership Limited | Information & communication | 2015 |
| Fendo Ltd | Real estate | 2026 |
| Fenix NO Limits EC MR Ltd | Wholesale & retail | 2020 |
| Fenlake Building & Joinery Solutions Limited | Construction | 2014 |
| Fentarivoxa Ltd | Wholesale & retail | 2026 |
| Fenton & Morris Construction Ltd | Construction | 2026 |
| Fenton Board (Banner Cross) Limited | Real estate | 2014 |
| Fenton Interiors Limited | Households | 2016 |
| Fera Network Consultancy Limited | Professional & scientific | 2026 |
| Fera Trading Limited | Wholesale & retail | 2025 |
| Feral Floral Limited | Wholesale & retail | 2025 |
| Feral Pixel Limited | Information & communication | 2024 |
| Ferham Road Mini Market Limited | Wholesale & retail | 2024 |
| Ferham Super Store Ltd | Wholesale & retail | 2024 |
| Ferham Tyres Ltd | Wholesale & retail | 2020 |
| Fern Forge Farriers Ltd | Administrative & support | 2007 |
| Fern House Limited | Professional & scientific | 1997 |
| Fernbrae Holdings Limited | Wholesale & retail | 2023 |
| Feron Holdings Limited | Financial services | 2026 |
| Ferris 4 Properties Ltd | Real estate | 2023 |
| Ferris Financial Solutions Limited | Financial services | 2008 |
| Ferris Mechanical Plumbing & Heating Services Limited | Construction | 2009 |
| Festival Trade Ltd | Wholesale & retail | 2025 |
| FF Ltd | Health & social care | 2017 |
| FGA Properties Limited | Households | 2023 |
| FGH Interior Design Limited | Wholesale & retail | 2021 |
| FHT Analytics Ltd | Information & communication | 2021 |
| Fialgus Ltd | Wholesale & retail | 2025 |
| Fibonaaci Ltd | Wholesale & retail | 2025 |
| Fibrefind Environmental Ltd | Professional & scientific | 2022 |
| Fibreflow Comms Ltd | Information & communication | 2026 |
| Fielding Grove Limited | Construction | 2014 |
| Fieldview Construction Ltd | Construction | 2026 |
| Fiestgloves Ltd | Wholesale & retail | 2024 |
| Figaros Barber S66 Ltd | Other services | 2022 |
| Fika Coffee Lounge Limited | Hospitality | 2025 |
| Filesmart Hub Ltd. | Professional & scientific | 2025 |
| Financial Fitness Instructor Limited | Professional & scientific | 2016 |
| Financial Hubs Management Ltd | Transport & logistics | 2025 |
| Find My Treasure Ltd | Wholesale & retail | 2025 |
| Finechamra Ltd | Wholesale & retail | 2018 |
| Finesse Construction Ltd | Construction | 2023 |
| Finesse Housing Ltd | Real estate | 2025 |
| Finesse Rentals Limited | Real estate | 2022 |
| Finesse Travel Ltd | Administrative & support | 2012 |
| Finesse Yorkshire Limited | Financial services | 2025 |
| Fingers Health Care Limited | Public administration | 2020 |
| Finlay & Louie Properties Limited | Real estate | 2022 |
| Finley Mews (Wickersley) Management Company Ltd | Real estate | 2015 |
| Finmark Group Ltd | Professional & scientific | 2023 |
| Finoxy Ltd | Information & communication | 2023 |
| Finsen Consulting Ltd | Professional & scientific | 2020 |
| Firat Foods Limited | Hospitality | 2024 |
| Fire Industry Protection Limited | Construction | 2025 |
| Firecore Secure Ltd | Administrative & support | 2024 |
| Firefort Solutions Ltd | Construction | 2025 |
| Fireleaf Limited | Professional & scientific | 2014 |
| Firesoft Solutions Ltd | Information & communication | 2023 |
| Firestar Safety Limited | Manufacturing | 2015 |
| Firmac Scaffolding Ltd | Construction | 2012 |
| First Choice Learning Limited | Administrative & support | 2025 |
| First Class Building Group Ltd | Construction | 2020 |
| First Rate Brickwork Limited | Construction | 2026 |
| First Rate Property Management Ltd | Real estate | 2018 |
| First Response Medical Logisitcs Limited | Transport & logistics | 2025 |
| First Steps Accommodations Ltd | Real estate | 2025 |
| Firth (UK) Ltd | Construction | 2013 |
| Firth Rixson Metals Limited | Manufacturing | 1914 |
| Firth Rixson Rings Limited | Professional & scientific | 1987 |
| Firvale Limited | Financial services | 2004 |
| Fish Fellows Ltd. | Hospitality | 2017 |
| FISH6 Limited | Extraterritorial | 2005 |
| Fishers Consultancy Limited | Professional & scientific | 2024 |
| Fishing Clothing Shop Limited | Wholesale & retail | 2026 |
| FIT4RUGBY Ltd | Education | 2019 |
| Fitz Property Services Ltd | Real estate | 2025 |
| Fitz Rail Ltd | Construction | 2019 |
| Fitzgard Ltd | Wholesale & retail | 2026 |
| Fitzrovia Ventures Limited | Financial services | 1987 |
| Fitzwilliam Hotel Limited | Hospitality | 2002 |
| Fitzwilliam PM Ltd | Construction | 2014 |
| Fitzwilliam Properties Limited | Real estate | 2016 |
| Fitzwilliam Road TEN2TEN Limited | Wholesale & retail | 2026 |
| Five Star Cleaning Sheffield Ltd | Administrative & support | 2020 |
| Fivestar Garage Ltd | Wholesale & retail | 2020 |
| Fiveways Fish Bar Limited | Wholesale & retail | 2008 |
| Fixtop Engineering Limited | Construction | 2018 |
| Fjell Homes Limited | Construction | 2023 |
| FJH Ltd | Financial services | 2025 |
| FK Complex Ltd | Real estate | 2025 |