| Gateway Installations Ltd | Construction | 2024 |
| Gatewood Group Limited | Real estate | 2026 |
| Gather&Go CIC | Wholesale & retail | 2024 |
| Gattuso's Limited | Hospitality | 2015 |
| Gatward & Sons Developments Ltd | Construction | 2013 |
| Gatward & Sons Ltd | Construction | 2015 |
| Gatward Construction Ltd | Construction | 2022 |
| Gaura Investments Ltd | Real estate | 2023 |
| Gaustic Games Ltd | Information & communication | 2025 |
| Gavin Wetton HR Limited | Administrative & support | 2009 |
| Gazeley Courtyard Management Limited | Households | 2023 |
| Gazeley QE II Memorial CIC | Administrative & support | 2023 |
| Gazelle Consulting Limited | Information & communication | 2007 |
| GB Newbry Abby Limited | Wholesale & retail | 2024 |
| GB Race Engineering Limited | Arts & recreation | 2005 |
| GB Social Housing PLC | Financial services | 2010 |
| GB Technical Services (UK) Ltd | Construction | 2014 |
| GBA Online Ltd | Administrative & support | 2014 |
| GBG Global Group Limited | Financial services | 2022 |
| GBG Limited | Professional & scientific | 1996 |
| GBR Trans Ltd | Transport & logistics | 2018 |
| Gbsh Management Limited | Professional & scientific | 2015 |
| Gbts Properties Ltd | Real estate | 2023 |
| GC Biotech UK Ltd | Professional & scientific | 2017 |
| GC Management Company Ltd | Real estate | 2024 |
| GC Turkish Barber Ltd | Other services | 2022 |
| Gcbymc Ltd | Professional & scientific | 2025 |
| Gchc Limited | Professional & scientific | 2023 |
| GCK Homes Ltd | Real estate | 2025 |
| GCL Home Management Ltd | Extraterritorial | 2010 |
| Gclm Limited | Professional & scientific | 2015 |
| GCM Technical Products Co Limited | Wholesale & retail | 2020 |
| GCN Capital Limited | Financial services | 2019 |
| Gcoti Ltd | Information & communication | 2018 |
| GCS Contractors Ltd | Construction | 2025 |
| GD Smartway Ltd | Wholesale & retail | 2016 |
| GDC Service Ltd | Administrative & support | 2025 |
| GDE Technology Ltd | Professional & scientific | 2012 |
| GDG Forensic Medical Services Ltd. | Public administration | 2014 |
| GDM Structures Ltd | Manufacturing | 2023 |
| GDP Engineering & Consulting Limited | Professional & scientific | 2014 |
| Gdpr Auditing Limited | Hospitality | 2005 |
| GDPR360 Trading Ltd | Information & communication | 2017 |
| GE Services Limited | Professional & scientific | 2003 |
| Geamavi Ltd | Manufacturing | 2025 |
| Gearlion International Ltd | Wholesale & retail | 2019 |
| Gearset Limited | Information & communication | 2016 |
| GEB Foundation | Professional & scientific | 2022 |
| Gecko BIO Limited | Professional & scientific | 2025 |
| Gecko Interactive Ltd | Other services | 2007 |
| Geekvape Electronic Cigarettes (UK) Limited | Extraterritorial | 2017 |
| Gehas Limited | Construction | 2018 |
| GEL Insights Ltd | Professional & scientific | 2015 |
| GEL8 Ltd | Professional & scientific | 2025 |
| Gelamack Innovations Technology Deutschland Limited | Extraterritorial | 2025 |
| Geldart Court (Management) Limited | Hospitality | 1996 |
| GEM Health Research Consultancy Ltd | Professional & scientific | 2025 |
| GEM Tone Ltd | Wholesale & retail | 2025 |
| Gemini Financial Management Limited | Financial services | 2000 |
| Gemini PVM Limited | Transport & logistics | 2022 |
| Gemini Sciences Limited | Professional & scientific | 2024 |
| Gemma Coteman Aesthetics Ltd | Other services | 2025 |
| Gemson Property Ltd | Construction | 2011 |
| Gemstone Accounting Ltd | Professional & scientific | 2024 |
| Gemstone Contracting Ltd | Extraterritorial | 2025 |
| Gena - Cars Ltd | Wholesale & retail | 2023 |
| Gender & Policy Insights Community Interest Company | Administrative & support | 2017 |
| Genehealth UK Limited | Health & social care | 2014 |
| Genemuk Ltd | Professional & scientific | 2018 |
| General Dynamics (UK) Technology Ltd | Manufacturing | 2025 |
| Generation Energy Ltd | Construction | 2025 |
| Generative Designs Ltd | Information & communication | 2023 |
| Genesis Biomass Limited | Agriculture & fishing | 2022 |
| Genesis Block Technologies Ltd | Information & communication | 2023 |
| Genesis Finance Limited | Financial services | 2024 |
| Genesis Medica Limited | Health & social care | 2010 |
| Genesis Pro Systems Limited | Professional & scientific | 1994 |
| Genestack Limited | Other services | 2011 |
| Genestack Services Limited | Other services | 2013 |
| Genetic Ancestor Limited | Information & communication | 2005 |
| Genghis Stansted Ltd | Hospitality | 2025 |
| Genie Goals (Holdings) Limited | Wholesale & retail | 2026 |
| Genie Goals Ltd | Wholesale & retail | 2019 |
| Genie Shopping (Holdings) Ltd | Wholesale & retail | 2019 |
| Genie Shopping Ltd | Wholesale & retail | 2014 |
| Genie Ventures Ltd | Extraterritorial | 2020 |
| Genius 2000 Limited | Information & communication | 1998 |
| Genius Gridmaker Ltd | Wholesale & retail | 2025 |
| Genius Growth Consulting Ltd | Professional & scientific | 2024 |
| Genji Services Limited | Hospitality | 2020 |
| Genki Productions Ltd | Professional & scientific | 2010 |
| Genomage Health Ltd | Information & communication | 2024 |
| Genserv Technical Services Limited | Professional & scientific | 2014 |
| Gentle Beginnings Limited | Education | 2026 |
| Gentle Import and Export Company Limited | Wholesale & retail | 2023 |
| Gentle Wolf Ltd | Real estate | 2025 |
| Genuinous Holdings Ltd | Financial services | 2026 |
| Genuinous Ltd | Professional & scientific | 2026 |
| Genus Cams Ltd | Financial services | 2025 |
| Genxt Ltd | Information & communication | 2019 |