| Ground UP South East Limited | Construction | 2023 |
| GROUND2FLOOR Construction Ltd | Construction | 2021 |
| Grounded Surfaces Limited | Construction | 2018 |
| Groundsfest Academy Limited | Administrative & support | 2025 |
| Group Direct Marketing Limited | Other services | 2005 |
| Groves (Thanet) Holdings Limited | Real estate | 1965 |
| Grow I.T. Limited | Information & communication | 2003 |
| Grow in Kent Ltd | Professional & scientific | 2020 |
| Grow in London Ltd | Professional & scientific | 2017 |
| Grow the Roses Limited | Professional & scientific | 2026 |
| Grown Grub Limited | Wholesale & retail | 2024 |
| Groworth Ltd | Information & communication | 2024 |
| Grub ‘N Go Ltd | Hospitality | 2024 |
| Grumpy Pony Hobby Ltd | Wholesale & retail | 2019 |
| Grupo Verde Ltd | Professional & scientific | 2025 |
| Gsgs Events Ltd | Construction | 2026 |
| GSM Highways Limited | Professional & scientific | 2023 |
| GSM Partnership Ltd | Construction | 2024 |
| GT Taxis Sevenoaks Limited | Other services | 2009 |
| GTB Property Management Ltd | Households | 2016 |
| Gtmr Education Consultancy Ltd | Education | 2025 |
| GTW Services Kent Limited | Construction | 2025 |
| Guardian Ventures Holdings Ltd | Financial services | 2026 |
| Guardian Ventures Ltd | Manufacturing | 2024 |
| Guava Tree Limited | Real estate | 2014 |
| Guest's Shoe Services Limited | Wholesale & retail | 1961 |
| Gulihar Limited | Health & social care | 2011 |
| Gunton Grange Limited | Information & communication | 2007 |
| Gurkha Cleaning and Laundry Service Ltd | Administrative & support | 2015 |
| Guru Recruitment Marketing Ltd | Professional & scientific | 2018 |
| Gushlow & Cole Limited | Manufacturing | 2016 |
| Guthrie & Guthrie Property Ltd | Real estate | 2025 |
| GW (ST. Botolph's House) Limited | Real estate | 2001 |
| GW Harvey Ltd | Real estate | 2024 |
| GW Power Engineering Ltd | Professional & scientific | 2024 |
| GW Protection & PMI Specialists Ltd | Financial services | 2017 |
| GWA Logistics Ltd | Wholesale & retail | 2026 |
| Gwenda Property Company Limited | Real estate | 1961 |
| GWL Ltd | Construction | 2013 |
| Gybe Research Ltd | Professional & scientific | 2011 |
| Gymcastle Ltd | Wholesale & retail | 2020 |
| Gymsoul Ltd | Wholesale & retail | 2025 |
| Gynaehealth Consultants Ltd | Health & social care | 2019 |
| Gynaemed Healthcare Limited | Health & social care | 2022 |
| Gypforce Ltd | Construction | 2007 |
| H&S Dubai Limited | Real estate | 2025 |
| H+H Celcon Limited | Manufacturing | 1954 |
| H+H Celcon Pension Fund Trustee Limited | Financial services | 1988 |
| H+H UK Holdings Limited | Administrative & support | 2000 |
| H+H UK Limited | Manufacturing | 1930 |
| H.I.R Construction and Property Management Ltd | Households | 2024 |
| H.Jass Consulting Limited | Information & communication | 2013 |
| H20 Pumping Solutions Ltd | Administrative & support | 2013 |
| Habara Marketing & Events Limited | Administrative & support | 2015 |
| Hackstacked Ltd | Information & communication | 2025 |
| Haddley Property Ltd | Real estate | 2022 |
| Hadley Court Limited | Extraterritorial | 2006 |
| Halcon Security Group Ltd | Administrative & support | 2024 |
| Halima Cafe and Bakery Limited | Hospitality | 2016 |
| Halo Dental Studio Limited | Manufacturing | 2022 |
| Halo Management Services Limited | Administrative & support | 2016 |
| Halstead Place Residents Company Limited | Households | 2009 |
| HAM Productions Ltd | Information & communication | 2020 |
| HAM Property Productions Ltd | Real estate | 2025 |
| Hambridge Holdings Limited | Financial services | 2017 |
| Hambridge Homes (Auckland) Limited | Construction | 2020 |
| Hambridge Homes (Braemar) Limited | Construction | 2021 |
| Hambridge Homes (Highfield) Limited | Construction | 2022 |
| Hambridge Homes (Mantle) Limited | Construction | 2025 |
| Hambridge Homes (TM) Limited | Construction | 2020 |
| Hambridge Homes Limited | Construction | 2006 |
| Hambridge Homes Wavertree Court Limited | Extraterritorial | 2013 |
| Hambridge Investments Limited | Construction | 2017 |
| Hamdon Estates Limited | Real estate | 2018 |
| Hamel Advisors Limited | Information & communication | 2013 |
| Hamilton Developments Surrey Ltd | Construction | 2022 |
| Hammer IT Home Limited | Construction | 2015 |
| Hampton 77 Consulting Limited | Professional & scientific | 2016 |
| Hampton Hill 1998 Limited | Real estate | 2018 |
| Hampton Imaging Services Limited | Health & social care | 2010 |
| Hanatown Limited | Real estate | 2020 |
| Hancock and Rowe Ltd | Information & communication | 2019 |
| Hancock Homes Ltd | Real estate | 2022 |
| Hand Picked Hotels Limited | Hospitality | 1999 |
| Hand Picked Limited | Hospitality | 2026 |
| Hand Picked Property Limited | Hospitality | 2026 |
| Handlebar Compliance Ltd | Professional & scientific | 2020 |
| Hans Motors Holdings Limited | Administrative & support | 1964 |
| Hansard Stewart Investments Ltd | Financial services | 2020 |
| Hansen & Associates Ltd | Real estate | 2010 |
| Happily Ever After Parties Ltd | Arts & recreation | 2022 |
| Happy Belly Foods Ltd | Manufacturing | 2013 |
| Happy Hippos Services Limited | Transport & logistics | 2025 |
| Harbourne Associates (Temp and Contracts) Limited | Construction | 2020 |
| Harbourne Associates Limited | Administrative & support | 2013 |
| Harding & Boulter Limited | Information & communication | 2003 |
| Hardy Drainage Limited | Water & waste | 2011 |
| Harlex Build Limited | Construction | 2021 |
| Harley Send Consultancy Limited | Education | 2023 |
| Harley Street Cosmetic Medical Group Ltd | Health & social care | 2022 |