| Gains AI Ltd | Arts & recreation | 2025 |
| Galaxy Taxi Ltd | Transport & logistics | 2022 |
| Galley Group Ltd | Manufacturing | 2025 |
| Gareth Cousins Music Limited | Information & communication | 2015 |
| Garman Technology Limited | Wholesale & retail | 2022 |
| Garmon Holdings Limited | Real estate | 2019 |
| Garmon Properties Limited | Real estate | 2018 |
| Gary Woskett (Builders) Limited | Construction | 2012 |
| GB Cycle Components Limited | Manufacturing | 1974 |
| GB Cycles Limited | Financial services | 2021 |
| GB Health, Care and Education Ltd | Professional & scientific | 2020 |
| GB Logistix Ltd | Transport & logistics | 2025 |
| GBF Building Services Limited | Construction | 2021 |
| GBR Surveys Ltd | Construction | 2013 |
| Gcse Classroom Ltd | Education | 2021 |
| GDI Investment Management Ltd | Real estate | 2017 |
| GDW Investments Limited | Real estate | 2025 |
| GDW Properties Limited | Real estate | 2012 |
| Gemma & Jodi's Pet Services Ltd | Other services | 2024 |
| Genesure Limited | Extraterritorial | 2012 |
| Genie Equity Ltd | Information & communication | 2026 |
| Genie Suite Limited | Information & communication | 2014 |
| Gentle Palms Care Limited | Health & social care | 2024 |
| Gentlemend Limited | Administrative & support | 2024 |
| George Pragnell Limited | Wholesale & retail | 1956 |
| GF Strategic Finance Ltd | Professional & scientific | 2026 |
| Gfel Holdings Limited | Financial services | 2025 |
| Gfel Properties Limited | Real estate | 2025 |
| Gibraltar Direct Limited | Transport & logistics | 2015 |
| Gibteck Ltd | Construction | 2017 |
| Giles Garratt Limited | Professional & scientific | 2019 |
| Gilltech Professional Solutions Limited | Professional & scientific | 2004 |
| Gilpin Associates 2 Ltd | Manufacturing | 2022 |
| Gilpin Associates Ltd | Real estate | 2010 |
| Ginger Lifestyle Ltd | Real estate | 2015 |
| Ginger Property Limited | Real estate | 2015 |
| Gioconda Limited | Information & communication | 2006 |
| Gisbourne Builders Limited | Construction | 2025 |
| Gisbourne Construction Limited | Construction | 2010 |
| GJ Estate Planning Limited | Professional & scientific | 2022 |
| GJT Investing Ltd | Professional & scientific | 2023 |
| Gkae Trader Ltd | Wholesale & retail | 2016 |
| Gksharing Ltd | Wholesale & retail | 2022 |
| Gladryn Limited | Real estate | 1982 |
| GLC Marine Leisure International Ltd | Extraterritorial | 2025 |
| Glenwood Construction Limited | Construction | 1996 |
| Glo-Group Limited | Arts & recreation | 2018 |
| Global Cargo Connections Limited | Other services | 2014 |
| Global Lynx Limited | Professional & scientific | 2024 |
| Global Media Hub Limited | Professional & scientific | 2015 |
| Global Watch Applications Limited | Information & communication | 2025 |
| Globalwave Communications Limited | Professional & scientific | 2003 |
| Globe Kingston Ltd | Other services | 2020 |
| Glow Tanning Lounge Ltd | Other services | 2012 |
| Go European Limited | Wholesale & retail | 2001 |
| Go European Motorhomes & Caravans Limited | Wholesale & retail | 2011 |
| Go HR Ltd | Administrative & support | 2014 |
| Goautomate Limited | Extraterritorial | 2000 |
| Golden Nails 5 Ltd | Other services | 2020 |
| Golden Point Padel Events Ltd | Administrative & support | 2023 |
| Golden Point Padel Ltd | Arts & recreation | 2024 |
| Goldicote Hall (Management) Limited | Households | 1999 |
| Goliathtech Cotswolds Limited | Extraterritorial | 2026 |
| Goliathtech Midlands Limited | Construction | 2015 |
| Good Food Express Limited | Manufacturing | 2000 |
| Good Fortune 59 Ltd | Hospitality | 2025 |
| Good Fortune 888 Ltd | Hospitality | 2016 |
| Goodgame Properties Limited | Construction | 2011 |
| Gothia Property Ltd | Real estate | 2023 |
| Gracemount Developments (Worthing) Limited | Construction | 1997 |
| Graeme Morgan Electrical Limited | Construction | 2012 |
| Grand Union Junction Holdings Limited | Professional & scientific | 2009 |
| Granite IP Limited | Wholesale & retail | 2015 |
| Grantcf Limited | Wholesale & retail | 2011 |
| Grapheco Ltd | Hospitality | 2023 |
| Grasmere Court Management Co. Limited | Households | 1983 |
| Grass FED Ltd | Agriculture & fishing | 2021 |
| Graywood Properties Limited | Real estate | 2023 |
| Green Clementine Ltd | Professional & scientific | 2017 |
| Green Flamingo Properties Limited | Real estate | 2021 |
| Green Hill Cleaning Limited | Administrative & support | 2021 |
| Green OWL Therapy Limited | Health & social care | 2016 |
| Green Sheep Group Ltd | Manufacturing | 2006 |
| Green Sheep Partners Ltd | Professional & scientific | 2024 |
| Greenall Construction Limited | Construction | 2006 |
| Greenfinger Garden Care and Maintenance Limited | Administrative & support | 2021 |
| Greenhandz Ltd | Professional & scientific | 2020 |
| Greenhil Pizza Ltd | Hospitality | 2025 |
| Greenhill & Brownfield Limited | Professional & scientific | 2008 |
| Greenhill Pizza Ltd | Hospitality | 2021 |
| Greenline Surveys and Services Ltd | Professional & scientific | 2024 |
| Greenway Initiative Limited | Transport & logistics | 2024 |
| Greenwing Consultants Ltd | Professional & scientific | 2020 |
| Greenwood Autocare Limited | Wholesale & retail | 2026 |
| Greenwood Horizons Limited | Information & communication | 2023 |
| Grenfell James Associates Ltd | Professional & scientific | 2014 |
| Grenfell James Audit LLP | | 2011 |
| Grenfell James Wealth LLP | | 2014 |
| Grevayne Properties Limited | Construction | 1972 |
| Grey Business Holdings Limited | Financial services | 2021 |