| Guliyev Limited | Information & communication | 2018 |
| Gurkha Jewellery Limited | Other services | 2017 |
| Guru RAJ Ltd | Real estate | 2021 |
| Gurus Limited | Administrative & support | 2003 |
| Guspelver Limited | Professional & scientific | 2021 |
| Gusta AS Ltd | Manufacturing | 2025 |
| Guyman Entertainment Limited | Wholesale & retail | 2024 |
| GVA Solutions Ltd | Construction | 2025 |
| Gvlk Engineering Limited | Administrative & support | 2012 |
| GW Global Media Ltd | Information & communication | 2019 |
| Gwynne Holdings Limited | Financial services | 2024 |
| Gwynne Propco Limited | Real estate | 2025 |
| GYG Logistics Ltd | Transport & logistics | 2026 |
| Gylsson Homes Ltd | Real estate | 2018 |
| Gym Club JIA Ltd | Health & social care | 2024 |
| H & H Accessories Ltd | Wholesale & retail | 2019 |
| H & I Builders Ltd | Construction | 2021 |
| H & P Empire (UK) Limited | Construction | 2015 |
| H a Vision Limited | Health & social care | 2011 |
| H Consulting Limited | Professional & scientific | 2010 |
| H D8 LD Limited | Other services | 2020 |
| H Global Ltd | Other services | 2019 |
| H K Move Monitor Limited | Information & communication | 2025 |
| H L Building Services Limited | Construction | 2013 |
| H N T Vape Shop Ltd | Wholesale & retail | 2018 |
| H Runarsson Limited | Construction | 2007 |
| H W Bracknell Ltd | Hospitality | 2018 |
| H&B Globaltech Limited | Information & communication | 2024 |
| H&Jjr Ltd | Wholesale & retail | 2024 |
| H&M Diamond Services Ltd | Transport & logistics | 2023 |
| H&R Renovations Ltd | Construction | 2021 |
| H&R Sons Limited | Wholesale & retail | 2019 |
| H&S Business Enterprises Ltd | Wholesale & retail | 2026 |
| H&T World Wide Enterprise Ltd | Wholesale & retail | 2020 |
| H.A Home 27 Limited | Real estate | 2024 |
| H.B Construction Limited | Construction | 2012 |
| H.E.R.S. (Heating Equipment Replacement Services) Limited | Extraterritorial | 1978 |
| H2A Group Limited | Wholesale & retail | 2015 |
| H2O IT Limited | Information & communication | 2004 |
| HA Inc Ltd | Professional & scientific | 2011 |
| HA Mobile Tyres Ltd | Wholesale & retail | 2025 |
| HA8 Resources Limited | Professional & scientific | 2012 |
| Habaid | Health & social care | 2008 |
| Habibtea Ltd | Hospitality | 2025 |
| Hackney Fine Arts Community Interest Company | Education | 2019 |
| Hadar Holdings Ltd | Real estate | 2024 |
| Haddar Limited | Wholesale & retail | 2024 |
| Haddenham Dental Limited | Health & social care | 2022 |
| HAI Bricklayer Ltd | Construction | 2026 |
| Haideri Estates Limited | Real estate | 2022 |
| Haideri Holdings Limited | Real estate | 2018 |
| Haidi Services INT Ltd | Wholesale & retail | 2012 |
| Haifa Museum Limited | Real estate | 2018 |
| Hair & Wear London Ltd | Other services | 2024 |
| Hair by Charlotte Ltd | Other services | 2023 |
| Hair by MIN Ltd | Other services | 2020 |
| Haja Sesay Ltd | Health & social care | 2012 |
| Hakeem Brothers Limited | Real estate | 2026 |
| Hakeem Islam Qureshi Ltd | Wholesale & retail | 2025 |
| Hakim Khan Limited | Wholesale & retail | 2026 |
| Halachic Arbitration and Mediation Centre - Jewish Arbitration Limited | Other services | 2014 |
| Halal Pizza Ltd | Hospitality | 2026 |
| Halane Transport Ltd | Transport & logistics | 2026 |
| Halban Publishers Limited | Information & communication | 1986 |
| Hale Finance Limited | Financial services | 2022 |
| Halibo Contractors Ltd | Other services | 2015 |
| Hallian Facility Management Limited | Administrative & support | 2023 |
| Halliwick Gate Residents Company Limited | Households | 1994 |
| Hallmark Healthcare Limited | Health & social care | 2020 |
| Hamakor UK Ltd | Professional & scientific | 2010 |
| Hamdard Properties Ltd | Real estate | 2025 |
| Hamiltonn Holdingh Ltd | Financial services | 2025 |
| Hamiltonn Ltd | Information & communication | 2023 |
| Hamiltonn Trust | Financial services | 2024 |
| Hamlin Foods Limited | | 1988 |
| Hammer Cristian Ltd | Construction | 2024 |
| Hammond Builders Limited | Construction | 1982 |
| Hamnah Properties Ltd | Real estate | 2022 |
| Hampstead Dental Studio Limited | Health & social care | 2020 |
| Hampstead Handlers Ltd | Other services | 2011 |
| Hamsard 3768 Limited | Financial services | 2024 |
| Hanan Clinic Ltd | Other services | 2020 |
| Hands Design Graphics Ltd | Professional & scientific | 2005 |
| Hands on Maintenance Limited | Construction | 2015 |
| Haneveim Ltd | Real estate | 2005 |
| Hangkang Limited | Real estate | 2024 |
| Hanison Park Solutions Limited | Administrative & support | 2024 |
| Hanko Holdings Limited | Information & communication | 2024 |
| Hannspree UK Limited | Wholesale & retail | 2006 |
| Hanover Bond Investments Ltd | Real estate | 2016 |
| Hanover West (Asset Management) Ltd | Real estate | 1999 |
| Hanover West (Portfolio Management) Ltd | Extraterritorial | 2004 |
| Hanover West Limited | Real estate | 2002 |
| Hanu Ncrs Limited | Wholesale & retail | 2025 |
| Hanzu Ltd | Wholesale & retail | 2025 |
| Happy Burma Limited | Real estate | 2025 |
| Happy Chalet Ltd | Health & social care | 2023 |
| Happy Days Agency Limited | Other services | 2026 |
| Happy Homes 2023 Ltd | Real estate | 2023 |
| Happy Kids Holiday Club Ltd | Hospitality | 2026 |