| GB Structures Limited | Manufacturing | 2024 |
| GB Tasty Limited | Hospitality | 2023 |
| GB Traders London Limited | Wholesale & retail | 2015 |
| GB Ventilation Ltd | Construction | 2019 |
| GBA Consultants Ltd | Information & communication | 2024 |
| Gbart Recovery Ltd | Wholesale & retail | 2023 |
| GBC Lightspeed Ltd | Construction | 2025 |
| GBH Utilities Limited | Construction | 1998 |
| GBK Contracting Limited | Construction | 2019 |
| GBO Ltd | Transport & logistics | 2012 |
| GBP Carpentry Renovations Ltd | Manufacturing | 2020 |
| Gbtrix Ltd | Other services | 2023 |
| GC Beauty Studio Ltd | Wholesale & retail | 2026 |
| GC Bita Limited | Wholesale & retail | 2020 |
| GC Connections Ltd | Construction | 2024 |
| GC Decorating Limited | Construction | 2016 |
| GC Engineers Ltd | Manufacturing | 2013 |
| GC71 Services Ltd | Professional & scientific | 2026 |
| GCA Financial Advice Ltd | Financial services | 2024 |
| Gcarr Ltd | Information & communication | 2018 |
| GCE Transport Limited | Transport & logistics | 2025 |
| GCF Engineering Ltd | Professional & scientific | 2011 |
| GCH Realisations Ltd | Other services | 2012 |
| Gchihai Ltd | Construction | 2021 |
| GCI Buildgroup Limited | Construction | 2017 |
| GCM Brickwork Ltd | Construction | 2018 |
| GCM Consultancy Services Limited | Professional & scientific | 2019 |
| GCM Contractors Limited | Construction | 2010 |
| GCS Developments Limited | Real estate | 2002 |
| GCS Summit Limited | Education | 2018 |
| Gcss Services Ltd | Professional & scientific | 2026 |
| GCT Services Limited | Professional & scientific | 2006 |
| GD Build Company Ltd | Construction | 2023 |
| Gdaa ROM Ltd | Transport & logistics | 2015 |
| GDB Holdings Limited | Information & communication | 2026 |
| GDB Logistics Ltd | Transport & logistics | 2026 |
| Gdguk Limited | Other services | 2015 |
| GDI Solutions Limited | Information & communication | 2024 |
| GDJ Security Ltd | Administrative & support | 2019 |
| GDL Controls Limited | Professional & scientific | 2017 |
| GDM (UK) Ltd | Transport & logistics | 2014 |
| Gdmr Ltd | Transport & logistics | 2021 |
| GDR Logistics Limited | Transport & logistics | 2023 |
| GE Northants Limited | Real estate | 2013 |
| GE Transport Ltd | Transport & logistics | 2023 |
| Geartec Limited | Manufacturing | 2003 |
| Gebo Transport Ltd | Transport & logistics | 2026 |
| Geca Limited | Health & social care | 2022 |
| Gechos From Pindore Ltd | Information & communication | 2026 |
| Gecko Hairdressing Ltd | Administrative & support | 2016 |
| Geds Bespoke Carpentry Limited | Manufacturing | 2019 |
| Geelysis Limited | Information & communication | 2014 |
| Geemac Holdings Ltd | Financial services | 2019 |
| Geemac Sales and Marketing Limited | Wholesale & retail | 2003 |
| GEG Property Investment Ltd | Real estate | 2026 |
| Gega Innovations Ltd | Manufacturing | 2025 |
| Gegan Solutions Limited | Professional & scientific | 2005 |
| Geismar (UK) Limited | Manufacturing | 1980 |
| Geländewagen Limited | Wholesale & retail | 2026 |
| GEM Cable Communications Limited | Information & communication | 2004 |
| GEM Island Limited | Wholesale & retail | 2023 |
| Gem-Tec Electrical Solutions Limited | Construction | 2019 |
| Gemellivillas UK Limited | Real estate | 2015 |
| Gemini Build Ltd | Construction | 2024 |
| Gemini Technology Limited | Information & communication | 2000 |
| Gemini Trading Limited | Information & communication | 2009 |
| Gemitech Operations Limited | Professional & scientific | 1995 |
| Gems Cleaning Services Ltd | Administrative & support | 2010 |
| GEN10 Ltd | Professional & scientific | 2018 |
| GEN3BLOCK Limited | Information & communication | 2025 |
| Genagent Ltd | Information & communication | 2025 |
| Genco Offshore Ltd | Transport & logistics | 2025 |
| Genelli Logistics Ltd | Transport & logistics | 2026 |
| Genelli Tech Ltd | Information & communication | 2024 |
| General Acord Invest Ltd | Transport & logistics | 2016 |
| General Brands Limited | Administrative & support | 2018 |
| General Inspection Technical Office Ltd | Professional & scientific | 2023 |
| General Magic Ltd. | Professional & scientific | 2010 |
| General Practice Alliance Limited | Health & social care | 2014 |
| General Service Design & Build Ltd | Construction | 2023 |
| Generatemarketinguk Ltd | Professional & scientific | 2022 |
| Generation SIX Limited | Information & communication | 2014 |
| Generator Sales LLP | | 2012 |
| Generator Sales Products Limited | Information & communication | 2017 |
| Generator Systems Limited | Information & communication | 1997 |
| Generika Ltd | Information & communication | 2010 |
| Generosity Bank Ltd | Information & communication | 2018 |
| Genesis Blue Sky Ltd | Professional & scientific | 2017 |
| Genesis CDA Limited | Health & social care | 2017 |
| Genesis Consultant Services Ltd | Extraterritorial | 2017 |
| Genesys Systems Ltd | Wholesale & retail | 2023 |
| Genevieves Cafe Limited | Hospitality | 2021 |
| Genexus Limited | Wholesale & retail | 2026 |
| Gengas Limited | Energy | 1995 |
| Genifars Hairs Ltd | Wholesale & retail | 2025 |
| Genius Brickwork Ltd | Construction | 2021 |
| Genius Explorer Management Limited | Extraterritorial | 2014 |
| GENR8 Energy Ltd | Construction | 2022 |
| Gent Garments Limited | Wholesale & retail | 2018 |
| Gent Holdings Limited | Other services | 2018 |