| Freeway Systems Ltd | Administrative & support | 2026 |
| Fresh Horticultural Careers Ltd | Administrative & support | 2008 |
| Freyasigns Limited | Manufacturing | 2017 |
| Fridel Care Limited | Health & social care | 2023 |
| Frontier Computer Services Limited | Information & communication | 2005 |
| FSR Insight Solutions Ltd | Professional & scientific | 2024 |
| Fundamental Associated Brokers Limited | Financial services | 2002 |
| Fundamental Coaching Ltd | Education | 2024 |
| Fungai Ltd | Health & social care | 2015 |
| Funmicares Limited | Health & social care | 2020 |
| Furniture Design Consultancy Ltd | Professional & scientific | 2020 |
| Furore Cars Limited | Other services | 2011 |
| Fusion Mortgages Ltd | Financial services | 2019 |
| Future Home Capital Ltd | Real estate | 2025 |
| Future in Football Ltd | Arts & recreation | 2013 |
| Futuready Ltd | Education | 2026 |
| Futurecom Consultancy Limited | Transport & logistics | 1999 |
| Fuzeflo Ltd | Construction | 2026 |
| FWR Electrical Contractor Ltd | Construction | 2018 |
| G & H Automotives Basildon Limited | Wholesale & retail | 2021 |
| G & K Groundworks Limited | Real estate | 1997 |
| G a K Holdings Limited | Financial services | 2020 |
| G B Benningfield Limited | Administrative & support | 2016 |
| G Goddard Ltd | Construction | 2020 |
| G J Motorsport Engineering UK Limited | Professional & scientific | 2019 |
| G M Modelling Limited | Professional & scientific | 2012 |
| G M T Groundworks Limited | Construction | 2011 |
| G Massey Property Services Ltd | Households | 2023 |
| G R S Property Management Limited | Real estate | 2014 |
| G&B Waste Ltd | Water & waste | 2025 |
| G&E Property Group Limited | Real estate | 2026 |
| G&G Insurance Brokers Limited | Financial services | 2021 |
| G&M Communications Ltd | Information & communication | 2025 |
| G. J. Brett Carpentry and Joinery Ltd | Construction | 2011 |
| G.B.M. Building Services Limited | Construction | 2008 |
| G.D. Ground Engineering Services Ltd | Professional & scientific | 2020 |
| G.F. Weller Financial Services Limited | Financial services | 2005 |
| Gabriele Cappelli Limited | Arts & recreation | 2004 |
| Gabrielle Brooke Limited | Wholesale & retail | 2012 |
| Gala Motors Ltd | Wholesale & retail | 2012 |
| Gale Heating Ltd | Construction | 2023 |
| Galvoptics Limited | Wholesale & retail | 1973 |
| Gammack Consulting Limited | Professional & scientific | 2021 |
| GAR Property Ltd | Real estate | 2026 |
| Garrold Property Ltd | Real estate | 2024 |
| GAS Central Heating Limited | Construction | 2015 |
| GAS Haulage Ltd | Extraterritorial | 2023 |
| Gasfix Bros Ltd | Construction | 2018 |
| Gasreg Services Ltd | Construction | 2023 |
| Gateway Attractions Limited | Administrative & support | 2018 |
| Gavin Duncan Associates LLP | | 2015 |
| GB Installations Limited | Other services | 2021 |
| GBS Cooling Ltd | Other services | 2019 |
| GBT Steelwork and Construction Limited | Manufacturing | 2021 |
| Gear & Grind Coffee Co LLP | | 2025 |
| GEB Productions Limited | Information & communication | 2002 |
| GEE EFE Grooming Ltd | Other services | 2019 |
| GEE Tech IT Limited | Information & communication | 2013 |
| GEM Auto Services Ltd | Wholesale & retail | 2015 |
| GEM Exhibitions Ltd | Professional & scientific | 2018 |
| Gembridge Limited | Wholesale & retail | 1984 |
| Gemgrove Management Limited | Real estate | 2008 |
| Gemini Windows & Doors Ltd | Construction | 2022 |
| GEN 3 Developments Ltd | Construction | 2020 |
| Genco Construction Ltd | Construction | 2021 |
| Generations Estates Ltd | Real estate | 2025 |
| Genie Garage Door Specialist Ltd | Construction | 2023 |
| Geno Kent Ltd | Construction | 2017 |
| Gentz Essex Limited | Other services | 2018 |
| Geo-Analytics Ltd | Information & communication | 2015 |
| GET a Grip Skateboards Ltd | Wholesale & retail | 2020 |
| GET Rich OR DIE Frying Ltd | Hospitality | 2020 |
| Get-Tech Ltd | Information & communication | 2021 |
| Gfps Projects Limited | Public administration | 2019 |
| GH Independent Financial Solutions Limited | Financial services | 2018 |
| GHD Partnership (Eastleigh) Limited | Professional & scientific | 2012 |
| Giant Ltd | Extraterritorial | 2003 |
| Gilbert House (Ilford) Management Company Limited | Households | 2005 |
| Gilmore Protection Ltd | Construction | 2016 |
| Gimme Greek Limited | Hospitality | 2025 |
| Giraffe Horizon Properties Ltd | Hospitality | 2025 |
| GJD Comms Ltd | Information & communication | 2022 |
| Gladwin Capital Management Limited | Professional & scientific | 2020 |
| Glasscare Ltd | Administrative & support | 1999 |
| GLC Capital Ltd | Professional & scientific | 2022 |
| GLC Property Investments Ltd | Real estate | 2026 |
| Glendale Court RTM Company Limited | Real estate | 2007 |
| Global Citizens Advice Bureau Limited | Other services | 2017 |
| Global Property Development Ltd. | Real estate | 1998 |
| Globalreach Supply Outlet Ltd | Wholesale & retail | 2023 |
| Globe Thermal Insulations Ltd | Construction | 2012 |
| Go Chef Catering Limited | Wholesale & retail | 2023 |
| Go Morzine Limited | Hospitality | 2013 |
| Go Motorhome Limited | Administrative & support | 2023 |
| Goflex Cars Ltd | Transport & logistics | 2025 |
| Goforward Events Limited | Administrative & support | 2012 |
| Gold Tanning Ltd | Other services | 2023 |
| Golden Rose Services Limited | Construction | 2020 |
| Golden Sands Enterprises Ltd | Wholesale & retail | 2025 |
| Goldseven Limited | Hospitality | 1997 |