| Fatome Limited | Information & communication | 2019 |
| Fault Line Consulting Ltd | Professional & scientific | 2023 |
| FB Building Services Ltd | Construction | 2011 |
| FE Clayton Ltd | Professional & scientific | 2018 |
| Feedbackfans.Com Limited | Information & communication | 2013 |
| Fenice Court Management Company Limited | Households | 2012 |
| Fensom Business Solutions Limited | Professional & scientific | 2018 |
| Fergus Sgian Dubh Ltd | Manufacturing | 2024 |
| Ferlex Limited | Manufacturing | 2014 |
| Fettes Ltd | Construction | 2022 |
| Fieldbuild Limited | Construction | 2019 |
| FIFTEEN12 Limited | Information & communication | 2017 |
| Fifth EYE Limited | Professional & scientific | 2016 |
| Figura Futura Ltd | Professional & scientific | 2024 |
| FIL Interiors Ltd | Construction | 2022 |
| Filenote Properties Ltd | Construction | 2004 |
| Financial Analytics Research Society | Education | 2023 |
| Finishing Aids (Wales) Limited | Extraterritorial | 1989 |
| Finishing Aids and Tools Limited | Wholesale & retail | 1960 |
| Fiona Shea VA Ltd | Administrative & support | 2023 |
| Fire & Flight Ltd | Arts & recreation | 2019 |
| Fire Extinguishers Online Ltd | Wholesale & retail | 2005 |
| Fire Glaze Solutions Limited | Construction | 2012 |
| Firesafe Surveying Ltd | Professional & scientific | 2020 |
| Firestarpixel Ltd | Construction | 2022 |
| FISH24 CIC | Information & communication | 2026 |
| Fishpool Consulting Ltd | Professional & scientific | 2013 |
| Fishshopsno Ltd | Hospitality | 2025 |
| Fit Electric Ltd | Construction | 2024 |
| Fleur D'Amour Ltd | Wholesale & retail | 2025 |
| Flip the Script Network Ltd | Manufacturing | 2023 |
| Floating Rock Agency Ltd | Professional & scientific | 2025 |
| Flock Feign Ltd | Wholesale & retail | 2025 |
| Floor 23 | Professional & scientific | 2017 |
| Floor Surveys Limited | Construction | 1986 |
| Floored by IAN Ltd | Construction | 2012 |
| Flow State Pilates Limited | Arts & recreation | 2026 |
| Fluenta Solutions Limited | Wholesale & retail | 2014 |
| Flummoxverse Holdings Ltd | Financial services | 2025 |
| Flynn Podiatry Ltd | Health & social care | 2025 |
| FMJ Ventures Ltd | Real estate | 2026 |
| Fogc Holdings Limited | Professional & scientific | 2023 |
| Foilsun Limited | Information & communication | 2000 |
| Folbigg Farm Produce Limited | Wholesale & retail | 2010 |
| Follydays Ltd | Hospitality | 2025 |
| Food Van Finder Ltd | Information & communication | 2024 |
| Food, Innovation & Nutrition Ltd | Hospitality | 2019 |
| Football FUN Factory (Community 021) Limited | Arts & recreation | 2021 |
| Football FUN Factory (N.Ireland) Limited | Arts & recreation | 2022 |
| Forefront Scaffolding Limited | Construction | 2022 |
| Forever First Ltd. | Wholesale & retail | 2002 |
| Form by Design Limited | Wholesale & retail | 2014 |
| Form Components Ltd | Manufacturing | 2023 |
| FORM3R Limited | Arts & recreation | 2026 |
| Fortify Fire Ltd | Construction | 2024 |
| Fortis Fitness Ltd | Arts & recreation | 2024 |
| Fortune Apps Limited | Information & communication | 2011 |
| FOX & Varley Consultancy Ltd | Professional & scientific | 2026 |
| Foxbrook Properties Limited | Real estate | 2018 |
| FPH Services Limited | Construction | 2015 |
| Frashaw Ltd | Real estate | 2026 |
| Fred Broad Installations Limited | Administrative & support | 2015 |
| Freedom Insurance Services Limited | Administrative & support | 2002 |
| Freepine Limited | Wholesale & retail | 2021 |
| Freshstart Signature Ltd | Extraterritorial | 2025 |
| Friends Holdings Limited | Financial services | 2025 |
| Friends Holidays Limited | Hospitality | 2024 |
| Frimway Limited | Professional & scientific | 1983 |
| Frontline Electrical Services Limited | Construction | 2007 |
| Frozenbreak Limited | Wholesale & retail | 2015 |
| Fuhir Trading Services Ltd | Financial services | 2021 |
| Fully Functional Ltd | Health & social care | 2023 |
| Fund Alliance International Limited | Professional & scientific | 2004 |
| Furst AID Ltd | Education | 2026 |
| Fusion Autopaints Ltd | Wholesale & retail | 2021 |
| Futuresmart Limited | Real estate | 1988 |
| Futuresmart Residential Ltd | Real estate | 2014 |
| G & D Trading Company Limited | Construction | 1993 |
| G & E Signs Ltd | Manufacturing | 2014 |
| G & N Sansom Holding Ltd | Hospitality | 2025 |
| G Narbett Holdings Limited | Professional & scientific | 2022 |
| G Nath UK Ltd | Wholesale & retail | 2021 |
| G-Storm Developments Limited | Construction | 2018 |
| G.M Gilbert Family Butchers Ltd | Wholesale & retail | 2020 |
| G.S.N Conservatories Limited | Construction | 2012 |
| G3 Mortgages Limited | Financial services | 2021 |
| Gainz Fitness & Strength (Bedford) Ltd | Arts & recreation | 2019 |
| Gallyon GUN and Rifle Makers Limited | Manufacturing | 2019 |
| Gamlex Ltd | Other services | 2018 |
| GAP Consultancy Limited | Information & communication | 2018 |
| GAR Consulting Limited | Professional & scientific | 2011 |
| Garnet LAB Ltd | Professional & scientific | 2024 |
| Gary Bell Transformation Ltd | Professional & scientific | 2022 |
| Gary Toal Creative Limited | Professional & scientific | 2020 |
| GAS+ Limited | Construction | 2018 |
| Gasslo Ltd | Other services | 2018 |
| GC Logiistics Ltd | Wholesale & retail | 2026 |
| GCB Agricultural Machinery Ltd | Wholesale & retail | 2018 |
| GCC Digital Solutions PLC | Administrative & support | 2023 |
| GCC G7 Hotel Holdings Limited | Hospitality | 2017 |