| Gifts & Giggles Limited | Wholesale & retail | 2003 |
| GJC Letting Ltd | Real estate | 2025 |
| GJC Property Developments Ltd | Real estate | 2021 |
| Glemway Properties Limited | Real estate | 1967 |
| Gmarc Limited | Information & communication | 2005 |
| Goalart Limited | Construction | 1990 |
| Golf Delta Alpha Limited | Administrative & support | 2022 |
| Gomes Cubed Limited | Other services | 2011 |
| Graham Mental Health Professionals Limited | Health & social care | 2008 |
| Granville-Chapman Holdings Limited | Financial services | 2020 |
| Granville-Chapman Orthopaedics Limited | Health & social care | 2016 |
| Great Oak Investments Limited | Real estate | 2013 |
| Great Oak Property Limited | Real estate | 2017 |
| Green Heat (UK) Limited | Construction | 2009 |
| Green Shoots Real Estate Limited | Real estate | 2003 |
| Grey MSK Ltd | Health & social care | 2018 |
| GRH Training Consultancy Ltd | Professional & scientific | 2007 |
| Grosvenor Property Partnership LLP | | 2021 |
| Ground Rents for Sale Ltd | Real estate | 2016 |
| Guidance, Knowledge & Training Limited | Professional & scientific | 2001 |
| Gvhc Building Co LLP | | 2023 |
| H&R Property Services Ltd | Real estate | 2020 |
| Hambros Property Ltd | Real estate | 2022 |
| Hampshire & Pigeon Ltd | Wholesale & retail | 1997 |
| Hampshire Knee Limited | Health & social care | 2009 |
| Happy Tails Vets Ltd | Professional & scientific | 2021 |
| Harfranson Ltd | Real estate | 2021 |
| Harling Foundries (Hastings) Limited | Financial services | 2007 |
| Hastings and Daughter Ltd | Real estate | 2017 |
| Hastings and Daughter Properties Ltd | Real estate | 2024 |
| Hastings Construction Limited | Construction | 2017 |
| Hastings Flyfishers Club Limited(The) | Arts & recreation | 1932 |
| Haven Sent Properties Ltd | Real estate | 2016 |
| Hawkins Building Ltd | Construction | 2021 |
| Hawkins Legal Ltd | Professional & scientific | 2023 |
| Hawksmith Consultancy Ltd | Professional & scientific | 2023 |
| Hawthorn Safety Consultancy Limited | Professional & scientific | 2023 |
| Hawthorne & Heaney Limited | Manufacturing | 2013 |
| HCM Investments Ltd | Extraterritorial | 2023 |
| HCM Residential LLP | | 2023 |
| Hearth and Heart Limited | Construction | 2016 |
| Hedgehog Golf Company Limited | Arts & recreation | 2007 |
| Helmet Films Limited | Information & communication | 2016 |
| Helmet Investments Ltd | Wholesale & retail | 2020 |
| Herbert and Sons Property Limited | Real estate | 2025 |
| HFF Construction Limited | Construction | 2015 |
| Highland Contractors Limited | Extraterritorial | 2007 |
| Highland Market Gardens Ltd | Real estate | 2025 |
| Highpoint Freeholds (East Sussex) Ltd | Real estate | 2014 |
| Highview Homes Ltd | Construction | 2013 |
| Hippasus Aerospace Ltd. | Administrative & support | 2007 |
| HL Financial Services Limited | Financial services | 2003 |
| Hollington Park Limited | Construction | 2014 |
| Hollingworth Estate Management LLP | | 2022 |
| Hollingworth Investment Ltd | Real estate | 2022 |
| Hollylouise&Me Ltd | Professional & scientific | 2025 |
| Hollywood Tree Surgery Limited | Administrative & support | 2008 |
| Holmes Property Group Limited | Professional & scientific | 1991 |
| Holt Rise Management Limited | Households | 2016 |
| Home and Overseas Property Ltd | Real estate | 2018 |
| Homesmart Estates Limited | Real estate | 2014 |
| Horizon Associates Limited | Administrative & support | 2005 |
| Housebridge Limited | Real estate | 2003 |
| Houston Scott Property Training Ltd | Education | 2021 |
| Houston Wiggs Ltd | Financial services | 2018 |
| Howes Bookshops Limited | Wholesale & retail | 1946 |
| Howsmart Limited | Information & communication | 2015 |
| HR Edge Ltd | Professional & scientific | 2019 |
| HS Sutton Ltd | Real estate | 2023 |
| Hubbert Creative Solutions Ltd | Information & communication | 2009 |
| Hudson CBS LLP | | 2018 |
| Hughenden Fish Bar Limited | Hospitality | 2019 |
| Hummingbird Housing Partners CIC | Real estate | 2019 |
| IAN NJ White Limited | Extraterritorial | 2016 |
| Iberiano Wines Limited | Extraterritorial | 2012 |
| Identify Group Ltd | Information & communication | 2020 |
| Idrisk Advisory Limited | Financial services | 2003 |
| Ievolution Network Ltd | Information & communication | 2017 |
| Immkk Property Management LLP | | 2023 |
| Indexjade Limited | Construction | 1997 |
| Infinity Development & Management Ltd | Construction | 2023 |
| Infinity Developments and Construction Limited | Construction | 2022 |
| Infinity Group Corporations Limited | Financial services | 2022 |
| Infinity Infrastructure Ltd | Construction | 2023 |
| Infinity Living Ltd | Construction | 2022 |
| Infinity Tanning Lounge Limited | Wholesale & retail | 2013 |
| Infinity Utilities Ltd | Construction | 2020 |
| Insight@Infinite Solutions Ltd | Administrative & support | 2020 |
| Inveresk (Bexhill) Limited | Households | 2012 |
| Iproperty Ventures London LLP | | 2019 |
| Iproperty Ventures Ltd | Real estate | 2019 |
| Ironblock Ltd | Real estate | 2023 |
| Isabella's Wine Bar Limited | Hospitality | 2015 |
| Ityna Consulting Limited | Professional & scientific | 2023 |
| J & H Property Maintenance Limited | Construction | 2021 |
| J Bishop & Associates Ltd | Other services | 2011 |
| J Harrison & SON Limited | Construction | 1997 |
| J R Carley Contractors Ltd | Administrative & support | 2025 |
| Jameson Architectural Surveyors Limited | Professional & scientific | 2011 |
| Jamison Plumbing & Heating Ltd | Construction | 2010 |