| HAE Legacy Developments Ltd | Real estate | 2026 |
| Haines Holdings Limited | Financial services | 1991 |
| Hamba Africa Ltd | Administrative & support | 2017 |
| Harbourside Accident Repair Limited | Administrative & support | 2008 |
| Hardacre Properties Limited | Households | 1938 |
| Hardy's Publishing and Promotion Limited | Information & communication | 2001 |
| Harrier Management Limited | Real estate | 1997 |
| Harwood D Limited | Wholesale & retail | 2024 |
| Haus Agent Ltd | Construction | 2016 |
| Haus of FOX Aesthetics Ltd | Other services | 2025 |
| Hawkins Brothers Ltd | Real estate | 2026 |
| Haworth Manor Ltd | Hospitality | 2022 |
| Hayes Road Caravan & Camping Limited | Hospitality | 2025 |
| Healthselect Ltd | Financial services | 2023 |
| Hebbes Holdings Ltd | Administrative & support | 2015 |
| Helmet Hers Limited | Other services | 2017 |
| Hencur Homes Ltd | Real estate | 2017 |
| Henrae Holdings Ltd | Financial services | 2025 |
| Herbie Rentals Ltd | Real estate | 2026 |
| Hereford Christmas Trees Limited | Wholesale & retail | 2018 |
| Heritage Cotswold Homes Limited | Construction | 2020 |
| Hesteyri Academy Ltd | Education | 2024 |
| Hexagon Vehicle Logistics Limited | Transport & logistics | 2024 |
| Hide and Sleek Limited | Wholesale & retail | 2015 |
| Hidj Ltd | Other services | 2025 |
| Highbeech Limited | Extraterritorial | 2003 |
| Highcroft Limited | Other services | 1998 |
| Highland FOX Joinery Limited | Construction | 2026 |
| Highview Road Management Company Limited | Households | 2024 |
| Hill C Limited | Wholesale & retail | 2024 |
| Hill Grove Capital Limited | Financial services | 2017 |
| Hillstreet Training Rooms Ltd | Education | 2021 |
| Hinkley Point Claimants Limited | Professional & scientific | 2019 |
| Hips Social Ltd | Hospitality | 2019 |
| Honeysuckle Analysis Ltd | Professional & scientific | 2026 |
| Howat Rearing Ltd | Agriculture & fishing | 2012 |
| HST Plant & Engineering Ltd | Professional & scientific | 2025 |
| Hughes Bricklaying Limited | Construction | 2019 |
| Hunt Agri Services Limited | Administrative & support | 2012 |
| Hunt Energies Ltd | Extraterritorial | 2023 |
| Hunt Enterprises Ltd | Agriculture & fishing | 2024 |
| Hunt Farming Limited | Agriculture & fishing | 2021 |
| Hutchinson & Bailey Limited | Manufacturing | 2017 |
| Hutchinson Agrifoods Limited | Agriculture & fishing | 2018 |
| Hutchinson Publishing Limited | Information & communication | 2018 |
| Hydraulic Alliance Limited | Wholesale & retail | 2003 |
| Hygiene Services (Gloucester) Limited | Administrative & support | 2009 |
| IAN Watts & SON Limited | Other services | 2014 |
| IC Solutions Ltd | Wholesale & retail | 2026 |
| Ifsecure Limited | Information & communication | 2020 |
| Imagitec Limited | Wholesale & retail | 2003 |
| Infinite Precision Ltd | Information & communication | 1997 |
| Infinity Compressor Pumps Ltd | Manufacturing | 2021 |
| Innovation Spaces (Coleford) Ltd. | Real estate | 2010 |
| Integritas Change Management Limited | Administrative & support | 2015 |
| Intelligent Yarns Ltd | Professional & scientific | 2017 |
| Interfit Limited | Wholesale & retail | 2001 |
| Interstate Trading (Glos) Limited | Wholesale & retail | 2017 |
| Invisible Intelligence Ltd | Professional & scientific | 2020 |
| IS Parts Ltd | Wholesale & retail | 2022 |
| Island Box Services Ltd | Hospitality | 2025 |
| Ivory Consulting (2010) Limited | Information & communication | 2010 |
| J & M Holdings (Lydney) Limited | Financial services | 2017 |
| J & S Babbage Ltd | Construction | 2000 |
| J Cockburn.Com Limited | Real estate | 2010 |
| J Harrison Construction Ltd | Construction | 2022 |
| J W Betty & SON Limited | Construction | 2007 |
| J&J 4X4 Ltd | Wholesale & retail | 2023 |
| J.And C.Ward(Properties)Limited | Extraterritorial | 1963 |
| JA & JC Watkins Limited | Real estate | 2017 |
| JAG Building Services (FOD) Ltd | Construction | 2026 |
| Jamell Limited | Real estate | 2018 |
| James Andrew Morgan Electrical Services Limited | Construction | 2023 |
| James Bevan (Lydney) Limited | Transport & logistics | 1948 |
| James Court (Yorkley Slade) Management Company Limited | Households | 1990 |
| James Love Property Estate Ltd | Real estate | 2019 |
| James Martin Blinds Essex Ltd | Wholesale & retail | 2013 |
| James Martin Interiors (Colchester) Ltd | Administrative & support | 2025 |
| JAN Webb Accountancy Services Limited | Professional & scientific | 2006 |
| Jane FRY Ltd | Professional & scientific | 2021 |
| JBS Design Ltd. | Professional & scientific | 2023 |
| JCJ Fresh Start Ltd | Administrative & support | 2026 |
| JDB Electrics Services Ltd | Construction | 2026 |
| JDF Property Management Limited | Real estate | 2019 |
| Jenkins & Skilton Limited | Professional & scientific | 2014 |
| JKE Heating, Plumbing & Maintenance Ltd | Construction | 2026 |
| JLM Training and Mentoring Limited | Education | 2020 |
| JM Imaginings Ltd | Professional & scientific | 2025 |
| John Wilks Engineering Limited | Manufacturing | 2011 |
| Joshua's Catering Company Limited | Hospitality | 2011 |
| JPM Civils Ltd | Construction | 2026 |
| Jrps (South West) Ltd | Construction | 2016 |
| JSM Fitters Limited | Construction | 2011 |
| Just Eco Clean Ltd | Wholesale & retail | 2020 |
| JWH Group Ltd | Professional & scientific | 1989 |
| K & S Site Services Limited | Manufacturing | 2008 |
| K Howard & Sons Ltd | Wholesale & retail | 2007 |
| K J Toombs Cinderford Ltd | Real estate | 2011 |
| K Thorburn Ltd | Transport & logistics | 2019 |
| K'S Knick Knacks Ltd | Wholesale & retail | 2025 |