| GC Professional Services Limited | Professional & scientific | 2025 |
| Gdm(Uk) Ltd | Construction | 2026 |
| George George Limited | Wholesale & retail | 2017 |
| GET HER Going Limited | Wholesale & retail | 2016 |
| GET UP Group Limited | Financial services | 2025 |
| Gibbons Windows South East Limited | Construction | 2020 |
| Gilda Crescent (10-12) Limited | Real estate | 2006 |
| Glidden Design Limited | Administrative & support | 2002 |
| Global Good Communications Limited | Professional & scientific | 2011 |
| Glynde Court (Polegate) Company Limited | Real estate | 1997 |
| GMS Property & Developments Ltd | Real estate | 2020 |
| Go Twenty Seven Ltd | Wholesale & retail | 2019 |
| Go-Figure Customs Ltd | Wholesale & retail | 2025 |
| Goacher Developments Limited | Construction | 2011 |
| Gogoogoo Ltd | Administrative & support | 2020 |
| Golden Arrow Couriers Ltd | Transport & logistics | 2016 |
| Golden Jade Ltd | Wholesale & retail | 2014 |
| Golfbase Limited | Wholesale & retail | 2002 |
| Gondal Builds Ltd | Construction | 2025 |
| Good Flooring Limited | Administrative & support | 2019 |
| Good Neighbour Music Ltd | Information & communication | 2020 |
| Gorizont Social Enterprise C.I.C. | Education | 2015 |
| GR Business Consultants Ltd | Professional & scientific | 2014 |
| Grace Gasson Funeral Service Ltd | Other services | 2017 |
| Gran Paradiso Films Ltd | Information & communication | 2012 |
| Grange (Horam) Management Limited | Households | 2012 |
| Graphicz Limited | Information & communication | 2010 |
| Great Greek Ltd | Hospitality | 2024 |
| Great James Services Ltd | Professional & scientific | 2020 |
| Greekery Limited | Wholesale & retail | 2020 |
| Green Cat Estates Limited | Real estate | 2022 |
| Green Chilli Foods Limited | Hospitality | 2026 |
| Green Group SE Ltd | Transport & logistics | 2023 |
| Green Hunter Group Ltd | Information & communication | 2021 |
| Greg Grzegorz Service Ltd | Information & communication | 2019 |
| Greystone Nominees Ltd | Real estate | 2020 |
| Griffon Consulting Ltd | Professional & scientific | 2019 |
| Grisly Ltd | Administrative & support | 2014 |
| Groundframe Ltd. | Arts & recreation | 2015 |
| Group Bruzell Limited | Professional & scientific | 2006 |
| Grovejoy Limited | Administrative & support | 2016 |
| Gunfleet Limited | Wholesale & retail | 2016 |
| GXS Services Ltd | Administrative & support | 2015 |
| H.A.R Limited | Professional & scientific | 2016 |
| Half OFF Vacations Ltd | Professional & scientific | 2019 |
| Hamilton & White Limited | Administrative & support | 2014 |
| Hamilton-Pierce Ltd | Construction | 2009 |
| Hampton Home Finance Ltd | Financial services | 2021 |
| Hamsard One Thousand and Forty Three Limited | Professional & scientific | 1997 |
| Harbour Building Services Ltd | Construction | 2012 |
| Hardy Construction & Consulting Ltd | Construction | 2025 |
| Harry CFO Limited | Professional & scientific | 2023 |
| Hars Properties Limited | Real estate | 1963 |
| Hatzlaha LLP | | 2014 |
| Havelock Road (45-46) RTM Company Limited | Real estate | 2011 |
| Hawes Building Limited | Construction | 2013 |
| Hawes Property Developments Limited | Financial services | 2025 |
| Hawk Builders and Shopfitters Limited | Construction | 2005 |
| Hayberry Consulting Ltd | Information & communication | 2015 |
| Health + Plus Limited | Manufacturing | 1980 |
| Health Plus Limited | Manufacturing | 1991 |
| Healthy Leadership CIC | Professional & scientific | 2022 |
| Heartward Community Ltd | Professional & scientific | 2023 |
| Heartwood Construction Limited | Construction | 2016 |
| Heatcatcher Ltd | Construction | 2009 |
| Heather Accounts Direct Limited | Professional & scientific | 2017 |
| Heathfield and District Bonfire Society CIC | Arts & recreation | 2025 |
| Herball Drinks Ltd | Manufacturing | 2024 |
| Hertis Services Ltd | Information & communication | 2012 |
| HF Ammunition Company Limited | Wholesale & retail | 2016 |
| High Weald Rehabilitation Services Ltd | Health & social care | 2016 |
| Highlands Developments Limited | Financial services | 2020 |
| Hilary Close B Shareholders Limited | Households | 2025 |
| Hillcrest Garage (South East) Limited | Wholesale & retail | 2010 |
| Hillside Mews Development Limited | Households | 2024 |
| HIT Sturdy (Joinery & Interiors) Ltd | Construction | 2023 |
| HL Clinic Limited | Other services | 2024 |
| Hobbs Recovery Services Limited | Administrative & support | 2002 |
| Hobbs Rental Services Limited | Administrative & support | 2006 |
| Holles Holdings Ltd | Real estate | 2020 |
| Home Junction Limited | Wholesale & retail | 2018 |
| Home Sweet HMO Ltd | Real estate | 2022 |
| Hooked in the City Limited | Hospitality | 2010 |
| Hoop Barn Ltd | Construction | 2014 |
| Hoppings Softwood Products Limited | Agriculture & fishing | 1934 |
| House of Tmeer Limited | Wholesale & retail | 2019 |
| HP Dermatology Centre Limited | Health & social care | 2016 |
| HPD Management (Sussex) Limited | Construction | 2025 |
| Hsun.Uk Professional Services Ltd | Information & communication | 2018 |
| Hugo Sterk Ltd | Arts & recreation | 2019 |
| Human CNC Ltd | Manufacturing | 2017 |
| Humanable Ltd | Professional & scientific | 2024 |
| Hunte Homestead Ltd | Real estate | 2025 |
| I J Rose Services Ltd | Construction | 2024 |
| I4 Services Tech Ltd | Wholesale & retail | 2026 |
| Iain Taylor Consulting Limited | Professional & scientific | 2019 |
| Iber Consulting Ltd | Information & communication | 2019 |
| Ibmg Midco Limited | Financial services | 2018 |
| Ibmg Topco Limited | Financial services | 2018 |
| IC Potential Consulting Ltd | Other services | 2014 |