| Fraser Campbell Painting & Decorating Ltd | Construction | 2014 |
| Fresh Limits Ltd | Professional & scientific | 2015 |
| Fresh Mint Ltd | Hospitality | 2022 |
| Fresh Water Direct Limited | Extraterritorial | 2026 |
| Fried Onions Limited | Professional & scientific | 2020 |
| Friends.Tax LLP | | 2020 |
| Frog Financial Management Ltd | Financial services | 2012 |
| Frog Wealth Management Ltd | Financial services | 2016 |
| Frontier Biosciences Limited | Administrative & support | 2014 |
| Frontier Oncology Limited | Extraterritorial | 2014 |
| FSM Building Services Limited | Real estate | 2020 |
| FSM Management Services Limited Limited | Construction | 2018 |
| FUEL2U Limited | Wholesale & retail | 2014 |
| Furzefield (Ascot) Management Co Ltd | Households | 2020 |
| Fusion Venture Partners Limited | Professional & scientific | 2025 |
| Future Health Expo Ltd | Administrative & support | 2019 |
| Future Health Global Response Limited | Wholesale & retail | 2019 |
| Future Markets Ltd | Wholesale & retail | 2008 |
| Futurehealthlive Ltd | Administrative & support | 2020 |
| G F Falconer & SON Limited | Extraterritorial | 1954 |
| G.D.Hill Ltd | Construction | 2006 |
| G.E.D. Wealth Limited | Financial services | 2013 |
| G.R.K. Construction Limited | Construction | 1974 |
| G.R.K. Lettings Limited | Real estate | 2021 |
| GAD Mustata Ltd | Transport & logistics | 2025 |
| Galapagos U.K. Limited | Professional & scientific | 2024 |
| Galibier Limited | Professional & scientific | 2023 |
| Gallello Atelier Ltd | Wholesale & retail | 2023 |
| Gallia Limited | Professional & scientific | 2024 |
| Galliven Homes Limited | Construction | 2000 |
| Gaman Digital Ltd | Professional & scientific | 2024 |
| Gamma Financial Analysis Limited | Financial services | 2006 |
| Gate Gardens Limited | Health & social care | 2019 |
| Gates Investments Limited | Financial services | 1993 |
| GB Food Solutions Ltd | Professional & scientific | 2020 |
| GC Wealth Limited | Financial services | 2009 |
| GEM Estates Limited | Real estate | 2001 |
| Gemini Holdings Management Ltd | Construction | 2016 |
| General Asset Finance Limited | Financial services | 2002 |
| Geo-Serv Limited | Professional & scientific | 1991 |
| Georgie Benz Music Services Limited | Arts & recreation | 2025 |
| Georgina Wright Limited | Manufacturing | 2020 |
| Gershon and Sons Limited | Wholesale & retail | 2022 |
| Gervest Holdings Ltd | Financial services | 2023 |
| Gfmc Services Ltd | Professional & scientific | 2008 |
| Ghanson Consult UK Limited | Information & communication | 2024 |
| Ghme Limited | Construction | 2014 |
| Giant Entertainment & Management Limited | Real estate | 2020 |
| Giant Things Limited | Administrative & support | 1984 |
| Gillam Decor Limited | Construction | 2005 |
| Glasshouse Accountancy Limited | Professional & scientific | 2016 |
| Glendevon Trading Ltd | Real estate | 2013 |
| Global Connection Learning Limited | Education | 2022 |
| Global Education Management (Overseas) Limited | Education | 2011 |
| Global Focus Limited | Wholesale & retail | 2008 |
| Global Rotors Limited | Extraterritorial | 2019 |
| Global Sourcing and Promotions Limited | Wholesale & retail | 2021 |
| Global Wealth Academy Limited | Information & communication | 2024 |
| Glory Hill Farm Limited | Extraterritorial | 1998 |
| GMB Leisure Limited | Arts & recreation | 2009 |
| GNW Services Limited | Professional & scientific | 2015 |
| Gobarging Limited | Transport & logistics | 1998 |
| Gobell Limited | Professional & scientific | 2024 |
| Golden Achimi Limited | Hospitality | 2020 |
| Golders Hill and General Estates Company,Limited(The) | Real estate | 1908 |
| GOO Education Ltd | Education | 2021 |
| Goro MED Ltd | Health & social care | 2025 |
| Grab Hire London Ltd | Water & waste | 2016 |
| Grange Park Holdings Limited | Real estate | 2005 |
| Grayston Enterprises Ltd | Professional & scientific | 2008 |
| Great Missenden Garage Limited | Wholesale & retail | 2008 |
| Greater Globe Holdings Ltd | Wholesale & retail | 2025 |
| Green UK Clinics Ltd | Administrative & support | 2025 |
| Green UK Developments Ltd | Administrative & support | 2025 |
| Green UK Products Ltd | Wholesale & retail | 2025 |
| Green UK Wholesale Ltd | Wholesale & retail | 2025 |
| Green Urban Transport Limited | Transport & logistics | 2007 |
| Greenash Developments Limited | Real estate | 2003 |
| Greener Property Management Ltd | Real estate | 2024 |
| Greenlight Commercial and Consulting Ltd | Professional & scientific | 2018 |
| Greenock Hotels Limited | Hospitality | 1999 |
| Greentech Waste to Energy Limited | Water & waste | 2023 |
| Greenwood Glade Ltd | Construction | 2023 |
| Grid Prop Limited | Real estate | 2021 |
| Gripable Limited | Health & social care | 2017 |
| Grjw Consulting Ltd | Professional & scientific | 2020 |
| Group ASA Ltd | Administrative & support | 2018 |
| Group Cards Limited | Wholesale & retail | 2021 |
| Grovewood Services Ltd | Manufacturing | 2022 |
| Gscan Ltd | Professional & scientific | 2024 |
| GSP Accountancy Services Ltd | Professional & scientific | 2015 |
| Guard Point S Ltd | Households | 2025 |
| Guitar Cafe Limited | Information & communication | 1992 |
| Gulf Source Ltd | Information & communication | 2019 |
| Gurney Close Limited | Households | 2018 |
| GVS Properties Limited | Real estate | 2013 |
| Gvuk Design Limited | Wholesale & retail | 2013 |
| GWS Estates Ltd | Real estate | 2017 |
| Gymstar (Leighton) Limited | Arts & recreation | 2022 |
| Gymstar Leisure Group Limited | Arts & recreation | 2023 |