| Gabriela Alina Botea Limited | Professional & scientific | 2015 |
| Gaby Valeting Limited | Wholesale & retail | 2019 |
| Gadgetfox UK Ltd | Administrative & support | 2016 |
| Gail Roberio Ltd | Wholesale & retail | 2025 |
| Galbraith Wight Limited | Other services | 1996 |
| Game and Flames Bespoke Catering Limited | Hospitality | 2026 |
| Game and Flames Events Ltd | Hospitality | 2026 |
| Game and Flames Limited | Hospitality | 2016 |
| Gardens and Grounds Limited | Administrative & support | 2026 |
| Garnet Consultancy Ltd | Professional & scientific | 2024 |
| Garrod House Residents Association Limited | Households | 2006 |
| Gary's Burgers Ltd | Wholesale & retail | 2022 |
| Gasplus Energy Services Ltd | Construction | 2025 |
| Gatehouse Residents Amenity Limited | Households | 1989 |
| Gemini Construction Brothers Ltd | Construction | 2020 |
| Gemini Greetings Ltd | Wholesale & retail | 2021 |
| Gemini Properties Sussex Limited | Real estate | 2022 |
| Gemselect Management a B & J Archery Road Limited | Households | 2022 |
| Gemselect Management Block K Limited | Households | 2022 |
| Genesis Sport & Entertainment Ltd | Professional & scientific | 2026 |
| Gerisa Group Limited | Real estate | 2017 |
| Getsetsave Ltd | Professional & scientific | 2016 |
| Gibbs Property Holdings Limited | Construction | 2016 |
| Gibsys Limited | Information & communication | 1995 |
| Gild Restore Limited | Arts & recreation | 2025 |
| Gillaroo Design Limited | Professional & scientific | 2002 |
| Giza Health Limited | Health & social care | 2024 |
| Giza Properties Ltd | Real estate | 2024 |
| GL 1066 Limited | Construction | 2022 |
| Global Education Marketing Limited | Education | 2016 |
| Global Golf Schools Limited | Administrative & support | 2017 |
| Global Medical Advancement C.I.C. | Other services | 2023 |
| Global Payments Consulting Services Limited | Professional & scientific | 2020 |
| Global SAP Ltd | Other services | 2025 |
| Global Technology Advancement C.I.C. | Other services | 2023 |
| Global Ventures Holdings Ltd | Wholesale & retail | 2023 |
| Glosol Ltd | Construction | 2025 |
| Gloucester Gate Limited | Real estate | 1996 |
| Glyne Consulting Ltd | Professional & scientific | 2023 |
| Glyne GAP School | Education | 2013 |
| Glyne Hall Freehold Limited | Real estate | 2006 |
| GMB 1066 Holdings Limited | Financial services | 2022 |
| GMB Air Conditioning and Ventilation Services Limited | Manufacturing | 2011 |
| Gnie Ltd | Information & communication | 2021 |
| GNT (South East) Limited | Real estate | 2022 |
| GNT Group Ltd | Professional & scientific | 2025 |
| Go Forward Property Management Ltd | Real estate | 2026 |
| Go-Haus Ltd | Construction | 2025 |
| Goddard Fencing & Trees Ltd | Construction | 2021 |
| Godolphin Consultancy Limited | Professional & scientific | 1998 |
| Godolphin Group Limited | Professional & scientific | 1998 |
| Godolphin Private Equity Limited | Professional & scientific | 1998 |
| Goldaway Properties Ltd | Real estate | 2018 |
| Golden Sands Ltd | Hospitality | 1986 |
| Good Wolves Capital CIC | Financial services | 2026 |
| Goose Events Group Ltd | Hospitality | 2026 |
| Gorse Vale Management Limited | Real estate | 1988 |
| GPS Food Service Solutions Ltd | Professional & scientific | 2012 |
| Grand Court (ST Leonards on Sea) Limited | Households | 2010 |
| Granite Worktops Sussex Limited | Construction | 2013 |
| Grantleigh Consultants Ltd | Professional & scientific | 2022 |
| Great High Woods Limited | Administrative & support | 2018 |
| Greeba Court Management Company Limited | Households | 1979 |
| Greek Street Holdings Ltd | Real estate | 2018 |
| Green Hedges Oxted Management Company Limited | Households | 2023 |
| Greenacres Leisure Limited | Hospitality | 2001 |
| Greengate Developments Ltd | Real estate | 2025 |
| Greengate Land Ltd | Real estate | 2025 |
| Greenwood Financial Advice Limited | Financial services | 2022 |
| Griffins Events Ltd | Hospitality | 2026 |
| Grime 2 Shine (South East) Limited | Administrative & support | 2021 |
| Grist Mill RYE Limited | Real estate | 2016 |
| Groundup Landscapes Ltd | Administrative & support | 2025 |
| Grove Court (Bexhill) Limited | Households | 2012 |
| Grove House Property Limited | Hospitality | 2019 |
| GT Roofing Services Limited | Construction | 2005 |
| Gymstop Distribution Limited | Wholesale & retail | 2025 |
| Gymstop Group Limited | Wholesale & retail | 2017 |
| H & a Truck Assistance Ltd | Wholesale & retail | 2015 |
| H & a Truck Holdings Ltd | Financial services | 2022 |
| Hair by AKO Ltd | Other services | 2026 |
| Hair by the Collective Limited | Other services | 2014 |
| Hales Brickwork Limited | Construction | 2014 |
| Hales Energy Limited | Professional & scientific | 2024 |
| Hall Enterprises Holdings Ltd | Financial services | 2023 |
| Hall Health and Education Limited | Health & social care | 2019 |
| Halleluyah Healthcare Ltd | Wholesale & retail | 2025 |
| Halligan Services Limited | Extraterritorial | 2007 |
| Hallowed Turf Limited | Arts & recreation | 1993 |
| Hammerton Caravan Group Limited | Professional & scientific | 1966 |
| Hammerton Leisure Limited | Hospitality | 1959 |
| Hammond Interiors South East Ltd | Construction | 2022 |
| Hampshire Mental Health Partners LLP | | 2025 |
| Hand to Hand Care Ltd | Public administration | 2018 |
| Handom Limited | Arts & recreation | 2015 |
| Hardings Caravan Repairs Limited | Other services | 2002 |
| Hareshakkish Properties Ltd | Real estate | 2025 |
| Harewood Close Residents' Association Limited | Other services | 1972 |
| Harley Shute Developments Ltd | Construction | 2025 |
| Harry&Lilly Ltd | Manufacturing | 2020 |