| Gallery 65 Limited | Wholesale & retail | 2015 |
| Gallifrey Investments Limited | Real estate | 2013 |
| Galvin & Co Interiors Limited | Construction | 2009 |
| Gambian Development Agency CIC | Other services | 2024 |
| Gambit Marine Ltd | Other services | 2020 |
| Game Rift Ltd | Information & communication | 2022 |
| Gameonology Ltd | Manufacturing | 2019 |
| Gamerz Ltd | Wholesale & retail | 2014 |
| Games Trove Ltd | Administrative & support | 2026 |
| Gannett International Finance LLP | | 2016 |
| Gannett International Holdings LLP | | 2016 |
| Gannett U.K. Limited | Extraterritorial | 1999 |
| Garabi Education Limited | Education | 2019 |
| Garden Court (Bournemouth) Management Company Limited | Households | 1983 |
| Garden House (Management) Limited | Households | 1977 |
| Garden of Secrets Ltd | Wholesale & retail | 2020 |
| Garden of Yeadon Ltd | Administrative & support | 2015 |
| Garden Ridge Management Limited | Households | 2006 |
| Gardens Outlook Limited | Households | 1980 |
| Gardin-Air Ltd | Manufacturing | 2017 |
| Gardner Road Management Company (Christchurch) Ltd | Households | 2012 |
| Gareth Clarke Consulting Limited | Professional & scientific | 2017 |
| Garfield David Construction Limited | Construction | 2023 |
| Garland Roofing Ltd | Construction | 2025 |
| Garm Depot Limited | Wholesale & retail | 2025 |
| Garstea Carpentry Ltd | Construction | 2022 |
| Gary Hawkins Motors Limited | Wholesale & retail | 2012 |
| GAS Assist Ltd | Manufacturing | 2019 |
| GAS Express LPG Ltd | Transport & logistics | 2019 |
| GAS Express Ltd | Transport & logistics | 2021 |
| GAS React Ltd | Construction | 2020 |
| GAS Wells Ltd | Mining & quarrying | 2026 |
| Gasbits Ltd | Wholesale & retail | 2005 |
| Gate 1 Components Ltd | Wholesale & retail | 2002 |
| Gatebeyond Ltd | Transport & logistics | 2026 |
| Gatehouse Cattery Limited | Other services | 2019 |
| Gatehouse Chessel Limited | Real estate | 2006 |
| GATEHOUSEJ4 Limited | Professional & scientific | 2013 |
| Gator Grafix Ltd | Manufacturing | 2002 |
| Gator Productions Limited | Information & communication | 2025 |
| Gaunts Construction Ltd | Construction | 2014 |
| Gaunts Heritage and Listed Buildings Ltd | Construction | 2019 |
| Gavin James Education Ltd | Education | 2016 |
| Gavya Enterprise Ltd | Hospitality | 2024 |
| GB Build Solutions Ltd | Construction | 2026 |
| GB Entertainment Ltd | Real estate | 2023 |
| GB Fire Safety Solutions Ltd | Public administration | 2025 |
| GB Tiling Ltd | Construction | 2013 |
| Gb&B Services Limited | Administrative & support | 2013 |
| Gblrc Events Ltd | Arts & recreation | 2025 |
| GBY Stores Ltd | Wholesale & retail | 2025 |
| GC 2018 Developments Ltd | Construction | 2018 |
| GC Datatech Ltd | Information & communication | 2020 |
| GC Dynamics Ltd | Manufacturing | 2014 |
| GC Technical Consulting Ltd | Professional & scientific | 2026 |
| GCA Events Ltd | Administrative & support | 2014 |
| GCM Parkwood Consulting Ltd | Information & communication | 2017 |
| GD Paintwork Limited | Wholesale & retail | 2023 |
| GDG Lettings Ltd | Real estate | 2022 |
| GDG Projects Ltd | Professional & scientific | 2022 |
| GDH Civils Ltd | Construction | 2024 |
| GDH Plastering Ltd | Construction | 2025 |
| Gdmp Investments Limited | Financial services | 2020 |
| Gdmp Limited | Wholesale & retail | 2012 |
| Gdmp Properties Limited | Real estate | 2020 |
| GDN Motors Ltd | Wholesale & retail | 2025 |
| Gdnm Finance Ltd | Financial services | 2021 |
| Gdolls Hair Extensions Limited | Wholesale & retail | 2023 |
| GDS Decor and Home Improvements Ltd | Construction | 2018 |
| GDS Residential Ltd | Real estate | 2025 |
| GDW Financial Solutions Limited | Financial services | 2005 |
| Gearpower Group Ltd | Extraterritorial | 2016 |
| Gearscope Limited | Wholesale & retail | 1993 |
| Gearshift Garage Ltd | Wholesale & retail | 2025 |
| Gecko Contracts Ltd | Administrative & support | 2012 |
| GEE Whites Swanage Limited | Hospitality | 2022 |
| Geeantee Wholesale Limited | Wholesale & retail | 1983 |
| GEI Building Consultancy Limited | Professional & scientific | 2011 |
| Gelworx Inc Ltd | Other services | 2020 |
| Gemini Elite Performers Academy Ltd | Education | 2025 |
| Gemma Bonum Ltd | Manufacturing | 2025 |
| GEN WAH Takeaway Limited | Hospitality | 2026 |
| General Leisure Inc. Limited | Arts & recreation | 1999 |
| General Pacific Trading Co Limited | Wholesale & retail | 2006 |
| General Real Estate and Tangible Assets (Greata) Limited | Information & communication | 2003 |
| Genesis Health Consulting Ltd | Professional & scientific | 2025 |
| Genesis Property Services Ltd | Real estate | 2011 |
| Genevive Instant Care Ltd | Health & social care | 2019 |
| Genevive Unseen Ltd | Arts & recreation | 2025 |
| Genie Residential Mortgages Ltd | Financial services | 2018 |
| Gent's Body Care Ltd | Wholesale & retail | 2024 |
| Gentle Gardens Limited | Administrative & support | 2025 |
| Gentle Nails Bar Ltd | Other services | 2023 |
| Gents Belts UK Ltd | Wholesale & retail | 2012 |
| Genuine OEM Car Parts UK Limited | Wholesale & retail | 2024 |
| Geobella Developments Ltd | Construction | 2009 |
| Geomatic Engineering Surveys (UK) Limited | Professional & scientific | 2008 |
| George Commercial Limited | Real estate | 2025 |
| George IFA Limited | Professional & scientific | 2026 |
| George Morgan (Bournemouth) Limited | Extraterritorial | 2018 |