| Hawkes Property GN Limited | Real estate | 2026 |
| Hawkins Carpentry S/W Limited | Construction | 2017 |
| Haydon Forge Ltd | Wholesale & retail | 2024 |
| Haye Road Limited | Construction | 2013 |
| Hazell Construction (Western) Limited | Construction | 2005 |
| Head on Shepton Limited | Real estate | 2008 |
| Heads UP Somerset Ltd. | Health & social care | 1989 |
| Health Behaviour Group | Public administration | 2006 |
| Heaven Bound Essentials Ltd | Wholesale & retail | 2024 |
| Helen Moyers Limited | Extraterritorial | 2014 |
| Henley Lane Management Company Limited | Real estate | 2020 |
| Henley Phern Limited | Real estate | 1982 |
| Hennessy Building Contractors Limited | Construction | 2003 |
| Heppel Homes Ltd | Construction | 2014 |
| Herbert's Cars of Bristol Ltd | Wholesale & retail | 2021 |
| Here WE Go Again Limited | Real estate | 2015 |
| Heroes Productions Ltd | Information & communication | 2014 |
| Hewlett & Holdsworth Ltd | Other services | 2024 |
| Hexagon HR Ltd | Professional & scientific | 2022 |
| Higher Lock Leisure Ltd | Hospitality | 2020 |
| Highfield Capital Limited | Professional & scientific | 2008 |
| Highfields Capital Ltd | Financial services | 2025 |
| Highland COW Bells Limited | Financial services | 2025 |
| Hill Reading Architects Limited | Professional & scientific | 2007 |
| Hillcrest Search Limited | Administrative & support | 2009 |
| Hivale Services Limited | Public administration | 2013 |
| Hoce Limited | Health & social care | 2024 |
| Hoho Wells Ltd | Hospitality | 2025 |
| Holiday Hounds Limited | Other services | 2013 |
| Holland & Odam (S&G) Ltd. | Real estate | 2014 |
| Holland & Odam (Somerton) Ltd | Real estate | 2023 |
| Holy Rock Limited | Real estate | 2021 |
| Holy Well Glass Limited | Manufacturing | 2003 |
| Holy Well Holdings Limited | Real estate | 2023 |
| Home Massage Ltd | Other services | 2025 |
| Home, Business Entertainment and Technology Ltd | Other services | 2019 |
| Honeysuckle Farm Cottages Ltd | Hospitality | 2008 |
| Hooked on a Feeling Ltd | Professional & scientific | 2023 |
| Hope Solutions Services Ltd | Professional & scientific | 2018 |
| Hordern Ciani Ltd | Arts & recreation | 2015 |
| Horsehill Contracting Limited | Construction | 2010 |
| HP Homes Ltd | Real estate | 2014 |
| HQ Coffee Company Limited | Hospitality | 2025 |
| Hrch Ltd | Arts & recreation | 2025 |
| Hunter Studios Ltd | Manufacturing | 2018 |
| Huntsham Limited | Extraterritorial | 2011 |
| Huntsham Lodge Limited | Extraterritorial | 2013 |
| Hurd Investment Ltd | Real estate | 2021 |
| Hurn Consulting Limited | Information & communication | 2020 |
| HVV Consultancy Ltd | Professional & scientific | 2021 |
| I Designworks UK Limited | Professional & scientific | 2016 |
| I Love Tax, SO YOU Don'T Have to Limited | Extraterritorial | 2022 |
| I M Events London Ltd | Administrative & support | 2022 |
| Iabltrading Ltd | Wholesale & retail | 2023 |
| Iapcam UK Ltd | Health & social care | 2016 |
| Icannalink Limited | Professional & scientific | 2025 |
| Icoteq Limited | Information & communication | 2008 |
| Idel Group Ltd | Transport & logistics | 2016 |
| Idetox.Uk Ltd | Manufacturing | 2022 |
| IJC Properties Ltd | Real estate | 2019 |
| Ilexia Limited | Professional & scientific | 2010 |
| IM & S Solutions Limited | Administrative & support | 2007 |
| Immersive Events Ltd | Construction | 2014 |
| Indigo Expeditions Ltd | Professional & scientific | 2018 |
| Infinite Horizons Limited | Financial services | 2023 |
| Inkmark Limited | Manufacturing | 2005 |
| Inner Spiritual Warrior Ltd | Extraterritorial | 2014 |
| Innisfree 2000 Limited | Professional & scientific | 1998 |
| Innovation Agility Limited | Information & communication | 2014 |
| Insight Driven Innovation Limited | Manufacturing | 2003 |
| Institute of Licensing Events Limited | Information & communication | 2006 |
| Insulated Panel Systems Limited | Extraterritorial | 2015 |
| Inter System Specialists South West Limited | Construction | 2012 |
| Intesol Worldwide Limited | Education | 2006 |
| Intrafit Limited | Construction | 2003 |
| Intraflip 1 Limited | Construction | 2024 |
| Intranicity Ltd | Professional & scientific | 2019 |
| Intrasurv Ltd | Other services | 2025 |
| Invisible Windows Limited | Construction | 2025 |
| Ipay Ltd | Financial services | 2025 |
| Irons Empire Limited | Professional & scientific | 2023 |
| Isource Group Ltd | Professional & scientific | 2025 |
| ISS Property Developments Ltd | Construction | 2023 |
| ISS Supply Ltd | Wholesale & retail | 2023 |
| ISW Property Ltd | Real estate | 2015 |
| IT HAS to B Ltd | Hospitality | 2025 |
| Itech Wells Ltd | Wholesale & retail | 2026 |
| IVY Holdings Limited | Information & communication | 2023 |
| J & N Rossi Limited | Hospitality | 2000 |
| J and M Training Limited | Other services | 2011 |
| J Baxter and D RAY Property Account Ltd | Real estate | 2018 |
| J C Smith Farm Ltd | Agriculture & fishing | 2022 |
| J D Services (GB) Limited | Manufacturing | 2002 |
| J K Tree Services Limited | Agriculture & fishing | 2021 |
| J M LEE Construction Limited | Construction | 2019 |
| J Mansfield Ltd | Manufacturing | 2017 |
| J P Marine Ltd | Extraterritorial | 2007 |
| J&M Assets Management LLP | | 2025 |
| J&T Property Consultancy Ltd | Professional & scientific | 2017 |
| J.C. Ball & Sons Limited | Construction | 2002 |