| Fresh & Halal Meat Ltd | Wholesale & retail | 2026 |
| Fresh Daily (High Street) Ltd | Wholesale & retail | 2018 |
| Fresh Fruits & VEG Ltd | Wholesale & retail | 2024 |
| Fresh Hope Fertility PVT Ltd | Public administration | 2025 |
| Fresh Start Property Maintenance Limited | Construction | 2025 |
| Freshto Trading Limited | Wholesale & retail | 2024 |
| Freshworks (West END) Limited | Construction | 2014 |
| Friction Services (Bristol) Limited | Manufacturing | 2002 |
| Fridays Future Limited | Professional & scientific | 2011 |
| Friends for Lives C.I.C. | Public administration | 2021 |
| Friends Leisure Ltd | Other services | 2020 |
| Friends of ST Mary the Virgin Little Wakering C.I.C. | Education | 2022 |
| Frinton HCW Ltd | Other services | 2013 |
| Front Foot Consultancy Limited | Administrative & support | 2006 |
| Frontline Pipeline Water Services Ltd | Water & waste | 2021 |
| Frontrow Limited | Wholesale & retail | 2015 |
| Fruits of the Sea Limited | Agriculture & fishing | 2000 |
| Fryatt Golf Collective Limited | Education | 2026 |
| FSG Ltd | Financial services | 2014 |
| FTB Cleaners Limited | Administrative & support | 2023 |
| Fulford (Industrial & Domestic Heating) Limited | Other services | 1976 |
| Full of Grace Hair and Beauty Ltd | Other services | 2026 |
| Full on Flavour Limited | Manufacturing | 2007 |
| Full Stop Global Ltd | Wholesale & retail | 2025 |
| Fuller Functions Ltd | Hospitality | 2022 |
| Funkool Limited | Hospitality | 2011 |
| Funky Medical Accessories Limited | Manufacturing | 2006 |
| Furatto Limited | Real estate | 2014 |
| Fusion (Tooting) Management Company Limited | Households | 2012 |
| Future City Solutions Limited | Manufacturing | 2023 |
| Future Hits Ltd | Information & communication | 2021 |
| Future Telco Ltd | Information & communication | 2022 |
| Fuud Limited | Manufacturing | 2005 |
| Fyresky Ltd. | Arts & recreation | 2004 |
| G & L Taxis Limited | Transport & logistics | 2008 |
| G D Technical Resourcing Limited | Administrative & support | 2007 |
| G Davis Builders (UK) Limited | Wholesale & retail | 2007 |
| G Glaze Ltd | Construction | 2025 |
| G S Food Supermarket Limited | Wholesale & retail | 2005 |
| G Scott Limited | Other services | 2013 |
| G Scott Training Limited | Other services | 2015 |
| G T Forecourt Solutions Limited | Manufacturing | 2013 |
| G&Q Investments Ltd | Real estate | 2020 |
| G&S Heating Ltd | Construction | 2020 |
| G.S Properties Essex Limited | Real estate | 2021 |
| G.T. Power Limited | Extraterritorial | 1992 |
| G/R Managers Limited | Real estate | 2006 |
| G2X Maths and English Tuition Ltd | Education | 2026 |
| G3 Building Company Limited | Households | 2004 |
| G7A Ltd | Professional & scientific | 2025 |
| GA Maintenance Limited | Construction | 2020 |
| Gaineasy.Co Limited | Wholesale & retail | 2019 |
| Gainsborough House Limited | Real estate | 2009 |
| Gajanand Limited | Wholesale & retail | 2020 |
| GAK Building Services Ltd | Construction | 2021 |
| Galanta Construction Style Ltd | Construction | 2020 |
| Gallantry Park Management Company Limited | Households | 2012 |
| Gambero D'Oro Limited | Hospitality | 2015 |
| Gaming Sports Entertainment Group Limited | Financial services | 2025 |
| Gara 1 Ltd | Wholesale & retail | 2025 |
| Gara AF Limited | Professional & scientific | 2025 |
| Gardedge Properties Limited | Construction | 1963 |
| Garden Fusion Limited | Construction | 2006 |
| Garden Railways Limited | Wholesale & retail | 2015 |
| Gargate's Ltd | Manufacturing | 2025 |
| Garlands (ATS) Limited | Professional & scientific | 1997 |
| Garnett Wharfe (Otley) Management Company Limited | Households | 2014 |
| Garnett Wilson Conveyancing Services LLP | | 2010 |
| Garrason Chair Frames Limited | Construction | 2013 |
| Garrison IT Consulting Ltd | Information & communication | 2026 |
| Garrison Residents Ltd | Households | 2022 |
| Garudaa PVT Ltd | Wholesale & retail | 2026 |
| Garwood Property Management Ltd | Real estate | 2019 |
| Gary Crowhurst Limited | Professional & scientific | 2005 |
| Garydan Properties Limited | Construction | 2019 |
| GAS Water & Electric Limited | Construction | 1999 |
| Gasaka International Trading Ltd | Administrative & support | 2025 |
| Gateway Asset Management Limited | Extraterritorial | 2020 |
| Gateway Associated Surveying Limited | Extraterritorial | 2020 |
| Gateway Conveyancing Limited | Professional & scientific | 2018 |
| Gateway Facilities Limited | Other services | 2023 |
| Gateway Facilities Management Limited | Other services | 2011 |
| Gateway Financial Advisors Limited | Financial services | 2018 |
| Gateway Flats Limited | Real estate | 2015 |
| Gateway Ground Rents Limited | Professional & scientific | 2009 |
| Gateway Group Homes Limited | Real estate | 2021 |
| Gateway Holdings (AUB) Limited | Professional & scientific | 2009 |
| Gateway Insurance Brokers Limited | Financial services | 2006 |
| Gateway Lease Advice Limited | Extraterritorial | 2020 |
| Gateway Mayfair Limited | Real estate | 2022 |
| Gateway North Limited | Real estate | 2019 |
| Gateway Properties Limited | Real estate | 2009 |
| Gateway Property Holdings Limited | Real estate | 2004 |
| Gateway Property Management Limited | Real estate | 2002 |
| Gateway Property Services Limited | Financial services | 2018 |
| Gateway Surveying Limited | Professional & scientific | 2008 |
| Gateway Unity Limited | Construction | 2011 |
| Gaudium Associates Limited | Financial services | 2009 |
| Gaudium Consultants Limited | Financial services | 2011 |
| Gazelle London Building Consultancy Ltd | Professional & scientific | 2015 |