| Gadmont Ltd | Real estate | 2022 |
| GALLIUM79 Developments Limited | Construction | 2019 |
| Games&Stuff Ltd | Wholesale & retail | 2024 |
| Gardners Farm & Leisure Limited | Agriculture & fishing | 2026 |
| Gasplus Response Ltd | Manufacturing | 2011 |
| Gasson Ltd. | Construction | 1998 |
| Gatebox Engineering Limited | Wholesale & retail | 2001 |
| GB Aviation Ltd | Transport & logistics | 2022 |
| GBA Homes Ltd | Administrative & support | 2012 |
| George Stone Limited | Construction | 1958 |
| Gizmo Animation Limited | Information & communication | 2004 |
| Glengorse Court Limited | Households | 1980 |
| Global Arts Productions Limited | Information & communication | 1988 |
| Global Engineered Products Limited | Wholesale & retail | 2002 |
| Glow UP Aesthetics by Harriet Ltd | Other services | 2026 |
| Godparents Anthroposophical Training Fund | Education | 2003 |
| Goldenhands Gift Shop Ltd | Wholesale & retail | 2022 |
| Goldfinch Builders Limited | Construction | 2003 |
| Goldway Securities Limited | Real estate | 1995 |
| Graphicsi Limited | Arts & recreation | 2003 |
| Great Park Farm Ltd | Wholesale & retail | 2020 |
| Great Park Farm Shop Ltd | Wholesale & retail | 2021 |
| Great Water Properties Limited | Manufacturing | 1995 |
| Greenhayes Planning Ltd | Professional & scientific | 2016 |
| Greenwave Renewables Services Limited | Wholesale & retail | 2026 |
| Grip Creative Ltd | Information & communication | 2011 |
| Group Alba Ltd | Professional & scientific | 2011 |
| GSC Plumbing & Heating Engineers Ltd | Construction | 2003 |
| GW Structural Ltd | Professional & scientific | 2024 |
| H C Farm Shop & Cafe Ninfield Ltd | Hospitality | 2025 |
| H T Products Limited | Construction | 2002 |
| Harold Cloutt Associates Limited | Information & communication | 1986 |
| Harold Terrace Residents Association Ltd | Households | 2011 |
| Hastings and Rother Voluntary Association for the Blind | Health & social care | 1998 |
| Hastings Cottage Improvement Society Limited(The) | Real estate | 1888 |
| HAVASKIP(1066) Ltd | Administrative & support | 2008 |
| Hca's Direct Limited | Health & social care | 2023 |
| HD Change Ltd | Professional & scientific | 2018 |
| Headstart HR Solutions Ltd. | Administrative & support | 2017 |
| Hearts Design Ltd | Wholesale & retail | 2016 |
| Heavy Gang Limited | Administrative & support | 1976 |
| Heliace Limited | Transport & logistics | 2007 |
| High House (Battle) Limited | Real estate | 2001 |
| High Technology Products Limited | Manufacturing | 2005 |
| Hilders Field Management Company Limited | Households | 2004 |
| Hill Farm Holiday LET Ltd | Hospitality | 2021 |
| Hill Farm Yoga Ltd | Health & social care | 2021 |
| Hiwire Lift Services Limited | Construction | 2003 |
| Hoard Television Ltd | Information & communication | 2023 |
| Holograph Limited | Professional & scientific | 2016 |
| Hope Sussex Community - Home of Positive Energy CIC | Other services | 2022 |
| Hotel George Ltd | Hospitality | 2018 |
| House of Huckstepp Cakery Ltd | Manufacturing | 2019 |
| Hullabullz Ltd | Agriculture & fishing | 2023 |
| HUM & Whistle Limited | Extraterritorial | 2021 |
| Humblebee Media Ltd | Information & communication | 2020 |
| Hurst Wellness Limited | Administrative & support | 2022 |
| HW Britannia Ltd | Transport & logistics | 2020 |
| I a G Metalwork Limited | Manufacturing | 2003 |
| I Revell Business Advisory Services Ltd | Professional & scientific | 2021 |
| Idid Limited | Hospitality | 2014 |
| Idiss Limited | Real estate | 2006 |
| IMC Property Developments Limited | Real estate | 2021 |
| IML Management Solutions Limited | Professional & scientific | 2007 |
| Indie Farmer Ltd | Administrative & support | 2013 |
| Indratec Ltd | Water & waste | 2023 |
| Infinity BET on Course Ltd | Arts & recreation | 2025 |
| Innovative Development London Limited | Agriculture & fishing | 2016 |
| INTERACTIVE3 Ltd | Information & communication | 2011 |
| International Communications Consultancy Organisation Ltd | Other services | 1989 |
| International Creative Investments Limited | Professional & scientific | 2009 |
| International Facilities & Property Information Limited | Information & communication | 1976 |
| Iona Lift Services Limited | Construction | 2020 |
| IVE Grange Management Company Limited | Households | 1998 |
| IVY Court (Eastbourne) Limited | Households | 2003 |
| J Bentley & Daughters Ltd | Real estate | 2025 |
| J Pitman Limited | Agriculture & fishing | 2015 |
| J Sutton Property Ltd | Construction | 2026 |
| J. Dale Limited | Construction | 2002 |
| James Marquees Ltd | Administrative & support | 2018 |
| Jamila LEE Limited | Other services | 2025 |
| JAN VON DER Werth Limited | Health & social care | 2005 |
| Jdpm Property Services Ltd | Real estate | 2024 |
| Jefcoate Construction Limited | Construction | 2002 |
| Jetty 21 Productions Ltd | Administrative & support | 2018 |
| JG Varley Limited | Hospitality | 2015 |
| Jghb Solutions Ltd | Construction | 2025 |
| JLC Plumbing & Heating Ltd | Construction | 2025 |
| John Shaw Furniture Agencies Limited | Wholesale & retail | 2003 |
| Josh Cheshire Engineering Ltd | Wholesale & retail | 2024 |
| JSP Consulting Limited | Administrative & support | 2000 |
| Jtrassociates Limited | Education | 2021 |
| Justin Gardner Consulting Ltd | Professional & scientific | 2015 |
| Justjulesmed Healthcare Limited | Health & social care | 2022 |
| Kasama Creating Safe Brave Spaces CIC | Health & social care | 2022 |
| Kendarctic Siberian Huskies Limited | Agriculture & fishing | 2022 |
| Kenneth Townsend Designs Ltd | Extraterritorial | 2019 |
| Kent Canines Ltd | Extraterritorial | 2016 |
| Kent Mermaids Limited | Education | 2021 |
| Kent Silent Disco Ltd | Administrative & support | 2024 |