| Gedhawa Thai Wellness Ltd | Other services | 2024 |
| Geedub Limited | Information & communication | 2019 |
| Geeky Bear Limited | Information & communication | 2017 |
| Gefi Limited | Construction | 2014 |
| Geioco Ltd | Real estate | 2025 |
| Geion Ltd | Administrative & support | 2025 |
| GEL Landscaping and Groundworks Ltd | Administrative & support | 2022 |
| GEL Ovations Europe Limited | Health & social care | 2007 |
| Gelano LP | | 2013 |
| Gelato Mondo Ltd | Extraterritorial | 2013 |
| Geldar Medical Limited | Health & social care | 2024 |
| Gelgit Ltd | Hospitality | 2026 |
| Gelli HIR Farm Limited | Agriculture & fishing | 1963 |
| GEM DIY Ltd | Wholesale & retail | 2026 |
| GEM Property Services Limited | Real estate | 2019 |
| GEM Security Systems Ltd | Administrative & support | 2012 |
| GEM UK Recruitment Ltd | Administrative & support | 2020 |
| GEM Wellbeing Ltd | Professional & scientific | 2019 |
| Gemapharm Limited | Wholesale & retail | 1998 |
| Gemchem Limited | Professional & scientific | 2002 |
| Gemco Imports Limited | Manufacturing | 2021 |
| Gemdans Limited | Wholesale & retail | 2014 |
| Gemech Foundations Group Limited | Financial services | 2009 |
| Gemech Foundations Limited | Construction | 2021 |
| Gemech Ltd | Construction | 2010 |
| Gemini Energy Limited | Administrative & support | 2013 |
| Gemini Fire Consultants Ltd | Administrative & support | 2020 |
| Gemini Growth Partners Ltd | Professional & scientific | 2024 |
| Gemini Gymnastic Club | Arts & recreation | 2007 |
| Gemma Booth Photography Limited | Administrative & support | 2007 |
| Gemma Gurvidi Eventing Limited | Agriculture & fishing | 2023 |
| Gemma Wright Design Ltd | Professional & scientific | 2024 |
| Gemrod Limited | Professional & scientific | 1977 |
| Gems Property Thornbury Limited | Real estate | 2025 |
| Gemsolar Limited | Construction | 2010 |
| Gemtech Digital Solutions Limited | Information & communication | 2007 |
| GEN a Consultancy Ltd | Professional & scientific | 2020 |
| GEN P Ltd | Extraterritorial | 2025 |
| GEN X Ltd | Construction | 2008 |
| Genalpha Leaseholds Limited | Real estate | 2026 |
| Genalpha Properties Limited | Real estate | 2024 |
| GENER8 Genie Limited | Other services | 2005 |
| General Cars Services (UK) Ltd | Wholesale & retail | 2017 |
| General Consensus Ltd | Information & communication | 2022 |
| General Mills Finance Three UK Limited | Financial services | 2022 |
| General Mills Finance UK Limited | Financial services | 2019 |
| General Mills Finance UK One Limited | Financial services | 2021 |
| General Mills Finance UK Two Limited | Financial services | 2022 |
| General Mills Holding (UK) Limited | Professional & scientific | 2000 |
| General Mills Services (UK) Ltd | Hospitality | 1965 |
| General Mills UK Limited | Wholesale & retail | 2003 |
| General Panel Systems Limited | Manufacturing | 1977 |
| Generation Soil CIC | Health & social care | 2024 |
| Generations Building Ltd | Construction | 2023 |
| Generative Manufacturing Limited | Manufacturing | 2014 |
| Generative Parametrics Limited | Information & communication | 2009 |
| Genesis Agenda Ltd | Agriculture & fishing | 2020 |
| Genesis Dental Laboratory Ltd | Health & social care | 2010 |
| Genesis Scenery Ltd | Manufacturing | 2022 |
| Genesis SET Services Limited | Manufacturing | 2022 |
| Genetic Alliance UK Ltd | Health & social care | 2006 |
| Genie of Dunstans Ltd | Information & communication | 2021 |
| Geniecare Homes Limited | Health & social care | 2014 |
| Genius Film and Television Limited | Information & communication | 2023 |
| Genius Loci Events Ltd | Hospitality | 2024 |
| Genius Loci Limited | Hospitality | 1995 |
| Genius Plastering Ltd | Construction | 2019 |
| Genomic Labs Ltd | Professional & scientific | 2019 |
| Gensia Limited | Information & communication | 2026 |
| Gentec Electrical Ltd | Construction | 2014 |
| Gentic AI Ltd | Information & communication | 2025 |
| Gentle Ways Care Ltd | Health & social care | 2025 |
| Gentlemens Choice Ltd | Other services | 2017 |
| Gents of Bristol BS8 Ltd | Other services | 2025 |
| Gents Venetian Plastering & Rendering Ltd | Construction | 2024 |
| Genus International Ltd. | Professional & scientific | 1995 |
| GEO Testing Services Limited | Professional & scientific | 1991 |
| GEO Testing Services South West Ltd | Construction | 2025 |
| Geo-Wolff Ltd | Other services | 2016 |
| Geocore Civils Limited | Construction | 2026 |
| Geode Marketing Limited | Professional & scientific | 2019 |
| Geodesea Limited | Professional & scientific | 2010 |
| Geodesic Labs Ltd | Professional & scientific | 2025 |
| Geoff Lewis Electrical Limited | Construction | 2011 |
| Geoff Mountjoy Consultancy Services Ltd | Professional & scientific | 2017 |
| Geoff Pinner Aero Consultants Limited | Professional & scientific | 2019 |
| Geoff Rayner Carpentry Ltd | Construction | 2017 |
| GEOH2 Limited | Professional & scientific | 2023 |
| Geohazard Consulting Ltd | Professional & scientific | 2023 |
| Geolithical Limited | Mining & quarrying | 2023 |
| Geomatrix Solutions Ltd | Information & communication | 2021 |
| Geometric (Braggs Lane) Limited | Real estate | 2005 |
| Geometric Design and Build Ltd | Professional & scientific | 2024 |
| Geometric Group Limited | Professional & scientific | 2005 |
| Geometric Stone Limited | Construction | 2004 |
| Geopro Oilfield Technologies International Limited | Other services | 2025 |
| Geoquip Marine Services P.L.C. | Professional & scientific | 2018 |
| Geordassa Ltd | Transport & logistics | 2024 |
| Georganas Ltd | Professional & scientific | 2004 |
| George and Giles Building Services Ltd | Construction | 2019 |