| GA Interiors Ltd | Construction | 2018 |
| Gabbaipainting Ltd | Construction | 2022 |
| Gables Wrotham Management Limited | Households | 2016 |
| Gaelle French Tutors Ltd | Education | 2023 |
| GAG Grand Automatic Gates Ltd | Manufacturing | 2020 |
| Gall & Gall Ltd | Administrative & support | 2024 |
| Gallium Capital Limited | Financial services | 2011 |
| Gallium Fund Solutions Administration Limited | Administrative & support | 2009 |
| Gallium Fund Solutions Limited | Financial services | 2008 |
| Gallium P E Depositary Limited | Financial services | 2011 |
| Ganges Point (Shotley) Block Management Company Limited | Households | 2022 |
| Ganges Point 1 Limited | Administrative & support | 2022 |
| Gangeshwar Limited | Wholesale & retail | 2015 |
| Garancie Background Screening Limited | Administrative & support | 2026 |
| Garancie Limited | Administrative & support | 2009 |
| Garcia Commercial Property Limited | Real estate | 2026 |
| Garcia Homes & Estates Limited | Real estate | 2026 |
| Garden Cottages Management Company (Leigh) Ltd | Households | 2019 |
| Gardenology Ltd | Administrative & support | 2024 |
| Gary Coles Limited | Wholesale & retail | 2005 |
| GAS Station Limited | Wholesale & retail | 1992 |
| Gaskains Vineyard Contracting Limited | Agriculture & fishing | 2025 |
| Gatestreet Ltd | Information & communication | 2011 |
| Gavinkennedycreative Limited | Professional & scientific | 2016 |
| GB Bistro Limited | Hospitality | 2018 |
| GB Health & Wellness Ltd | Health & social care | 2022 |
| GBA Contracts (Essex) Ltd | Construction | 2019 |
| GBA Contracts Limited | Construction | 2014 |
| GBC Consulting Limited | Financial services | 2012 |
| GBP Group Ltd | Construction | 2021 |
| GBT Brickwork Ltd | Construction | 2010 |
| GC Harding Limited | Professional & scientific | 2025 |
| Gciib Property Ltd | Administrative & support | 2016 |
| GCS (GB) Limited | Other services | 2013 |
| Gecko Road Limited | Professional & scientific | 2020 |
| Gecko Travel Recruitment Ltd | Administrative & support | 2021 |
| Geec Holding Company Limited | Financial services | 2024 |
| Geeco 1000 Limited | Information & communication | 2025 |
| Geeco 150 Limited | Financial services | 2024 |
| Geeco Registrars Limited | Administrative & support | 2007 |
| GEL Appointments Limited | Real estate | 1993 |
| Gel-Tag Ltd | Administrative & support | 2023 |
| GEM C&C Ltd | Professional & scientific | 2020 |
| GEM Product Solutions Ltd | Wholesale & retail | 2018 |
| Gemma Dixon Psychotherapies Ltd | Health & social care | 2026 |
| Gemzas Garden Maintenance Limited | Administrative & support | 2023 |
| Gene Source UK LLP | | 2017 |
| Generational Planning Group Ltd | Public administration | 2019 |
| Generator Installers Limited | Manufacturing | 2014 |
| Genesis Company Services Ltd | Other services | 2018 |
| Genevafirst Eurasia Trading Company (UK) Limited | Wholesale & retail | 2016 |
| Genus Technologies Ltd | Administrative & support | 2016 |
| Geographers' A-Z 2013 Trustee Limited | Other services | 2013 |
| Geographers' A-Z MAP Company Limited | Information & communication | 1968 |
| George Oliver Associates Limited | Professional & scientific | 2024 |
| Georgie Murton Ltd | Manufacturing | 2023 |
| Geotechnical Experts Limited | Construction | 2016 |
| German Translation & Language Services (UK) Ltd. Ltd | Professional & scientific | 2016 |
| GET Coding Ltd | Information & communication | 2020 |
| GET Golfing Retail Limited | Wholesale & retail | 2020 |
| GET Golfing Trading Limited | Hospitality | 2018 |
| GET Yards Farnborough Limited | Administrative & support | 2022 |
| GET Yards Partnerships Limited | Other services | 2023 |
| GET Yards Woking Ltd | Transport & logistics | 2023 |
| Getboxxd Partnerships Limited | Administrative & support | 2025 |
| Getting IT Working Ltd | Information & communication | 2016 |
| GF Consulting Limited | Professional & scientific | 2022 |
| GFS Corporate Director Limited | Financial services | 2008 |
| GFS Founder Partner Limited | Financial services | 2011 |
| GFS Nominee 5 Limited | Financial services | 2024 |
| GFS Nominee 6 Limited | Financial services | 2024 |
| GFS Nominee 7 Limited | Financial services | 2025 |
| GFS Trustee Limited | Financial services | 2013 |
| Ghalh Beauty Ltd | Other services | 2025 |
| Ghja Properties Ltd | Construction | 2013 |
| GI and Protection Management Ltd | Financial services | 1998 |
| Giallo Cars Limited | Wholesale & retail | 2004 |
| Gibbs Laidler Consulting LLP | | 2006 |
| Gibbs Laidler Ltd | Financial services | 2023 |
| Gidov OIL & Logistics Ltd. | Wholesale & retail | 2020 |
| Gilbert Ventures Limited | Education | 2024 |
| Gilden Test & Inspection Limited | Construction | 2006 |
| Giles Hilton Tea Company Limited | Extraterritorial | 2013 |
| Giles Winser Creative Limited | Professional & scientific | 2018 |
| Gillian Victoria Interiors Limited | Professional & scientific | 2019 |
| Gilwell Leisure Limited | Wholesale & retail | 1998 |
| Ginger & Pickles Property Limited | Real estate | 2011 |
| Gingerink Limited | Administrative & support | 2016 |
| Gingermonkeys Creative UK Limited | Professional & scientific | 2010 |
| Girlactico Ltd | Professional & scientific | 2026 |
| GJM Implant Services Ltd | Health & social care | 2017 |
| Gjonaj Painting and Decorating Ltd | Construction | 2023 |
| Glam Garage Limited | Wholesale & retail | 2024 |
| GLC Consultants Limited | Professional & scientific | 2020 |
| Glebe Court Limited | Households | 1982 |
| Glendale Court Management Company Limited | Households | 1989 |
| Glenfinnan Partners Limited | Financial services | 2016 |
| Glive Limited | Professional & scientific | 2012 |
| Global Reach Linguistics Ltd | Professional & scientific | 2013 |
| Global Workforce Solutions Limited | Administrative & support | 2023 |