| GA 93 Ltd | Financial services | 2023 |
| GAL Consulting Limited | Professional & scientific | 2008 |
| Gala Hair Limited | Other services | 2005 |
| Gallery Bookshop Limited | Wholesale & retail | 2009 |
| Galloping Moves Ltd | Information & communication | 2024 |
| Galloways Projects Limited | Professional & scientific | 2016 |
| Game SET & Match (Chichester) Limited | Wholesale & retail | 1995 |
| Gamma Property Portfolio Limited | Construction | 2018 |
| Gannet 7 Ltd | Real estate | 2024 |
| GAP in the Market Ltd | Real estate | 2019 |
| Garage Door Solutions (South Coast) Ltd | Construction | 2023 |
| Garden House (Chichester) Limited | Households | 1993 |
| Garden Thyme Limited | Administrative & support | 2007 |
| Gardner Dynamics Ltd | Professional & scientific | 2026 |
| Garland Close Management Limited | Households | 2009 |
| Garraway Gardening Ltd. | Administrative & support | 2017 |
| Garrett Axford Limited | Professional & scientific | 2003 |
| Garry Noone Construction Limited | Construction | 2015 |
| GAS Ctrl Ltd | Construction | 2025 |
| Gate Securities Limited | Construction | 1994 |
| Gatehaus Limited | Professional & scientific | 2018 |
| Gatelodge Property Company Limited | Real estate | 1998 |
| Gatemile Limited | Professional & scientific | 2011 |
| Gateoffer Property Management Limited | Households | 1988 |
| Gateway Cement Services Ltd | Other services | 2015 |
| Gazprops Ltd | Information & communication | 2023 |
| GB Superminis Ltd | Wholesale & retail | 2026 |
| GB Workshop Ltd | Manufacturing | 2022 |
| GBA Catering Limited | Hospitality | 2022 |
| GBM Keystone Ltd | Real estate | 2025 |
| GCB Metalworks Limited | Manufacturing | 2025 |
| GCS Computer Services Limited | Information & communication | 1999 |
| GDC Collection Ltd | Wholesale & retail | 2015 |
| GDD Developments Limited | Real estate | 2017 |
| GDI Estate Planning Ltd | Professional & scientific | 2017 |
| Geegee Collection Ltd | Manufacturing | 2020 |
| Geenius Developments Ltd | Real estate | 2024 |
| Gees Camping Ltd | Hospitality | 2013 |
| Gelato Cart London Limited | Manufacturing | 2025 |
| Gelyfan Ltd | Professional & scientific | 2009 |
| Gemini Data Loggers (U.K.) Limited | Manufacturing | 1984 |
| Genaura Limited | Wholesale & retail | 2024 |
| Gender Consulting Services Ltd | Professional & scientific | 2022 |
| Genea Interiors Ltd | Professional & scientific | 2018 |
| Genesis Landscapes Ltd | Administrative & support | 2019 |
| Gentle Giant Event Production Ltd | Administrative & support | 2011 |
| Gentry Worldwide Ltd. | Professional & scientific | 2017 |
| Geocultura Limited | Administrative & support | 2020 |
| Geoffs Garden Ornaments Ltd | Manufacturing | 2008 |
| Georef Limited | Construction | 2015 |
| George Ewen Limited | Other services | 1946 |
| George Henty & Sons Limited | Manufacturing | 2020 |
| George IDE Investment Limited | Financial services | 2013 |
| George IDE LLP | | 2008 |
| Geraldines Management Limited | Extraterritorial | 2004 |
| GES Accountancy Limited | Professional & scientific | 1998 |
| GET the Keys Ltd | Hospitality | 2023 |
| Gf&Lp Construction Ltd | Construction | 2021 |
| GG Roofing Ltd | Construction | 2025 |
| Gg&M Ltd | Real estate | 2020 |
| Ghyll House Management Ltd | Real estate | 2020 |
| Gibbard & Sons Ltd | Construction | 2019 |
| Gibbings Harrison & Co Limited | Extraterritorial | 1890 |
| Gigi Lane Ltd | Hospitality | 2022 |
| Gilagu Limited | Information & communication | 2026 |
| Gilbert Hannam Close Management Company Limited | Households | 2016 |
| Gilessmith Group Ltd | Professional & scientific | 2010 |
| Gilessmith Wealth Management LLP | | 2015 |
| Gillian Mary Limited | Other services | 2023 |
| Gillingham Group Ltd | Financial services | 2018 |
| Gillingham Properties Ltd | Construction | 2021 |
| Gillson Moore Limited | Construction | 1975 |
| Gima Limited | Wholesale & retail | 2000 |
| GK Build Services Ltd | Construction | 2025 |
| Glam Cleaning Services Ltd | Administrative & support | 2025 |
| GLANCE24 Ltd | Wholesale & retail | 2010 |
| Glass Blocks Direct Limited | Wholesale & retail | 2004 |
| Glassy Rooms Limited | Wholesale & retail | 2026 |
| Gleaming & Cleaning Group Ltd | Administrative & support | 2018 |
| Glebedales Limited | Other services | 2013 |
| Glen Park (Selsey) Management Limited | Households | 1976 |
| Glide Sports Limited | Arts & recreation | 2022 |
| Glitter Walls UK Limited | Wholesale & retail | 2020 |
| GLO Advisers Ltd | Professional & scientific | 2018 |
| Global Appliance Care Ltd | Other services | 2017 |
| Global Candy Vending Ltd | Wholesale & retail | 2026 |
| Global Herbs (Europe) Limited | Wholesale & retail | 2022 |
| Global Home Services Limited | Construction | 2018 |
| Global Philanthropic Holdings UK Limited | Administrative & support | 2010 |
| Global Philanthropic Limited | Administrative & support | 2004 |
| Global Reach Pacific Ltd | Professional & scientific | 2024 |
| Global Risk Initiatives Limited | Financial services | 1997 |
| Global Talent International Ltd | Information & communication | 2025 |
| Globefish Consultancy Services Limited | Professional & scientific | 2021 |
| Glorious Spa (Havant) Ltd | Other services | 2018 |
| Glorious Spa (Rustington) Ltd | Other services | 2015 |
| Glorious Spa (Worthing) Ltd | Other services | 2014 |
| Glorious Spa Limited | Other services | 2010 |
| Gloucester Project Solutions Ltd | Other services | 2017 |
| Glow Hand Car Wash Ltd | Administrative & support | 2021 |