| Galon Medical Technology Co., Ltd | Beckenham | 2015 |
| Galore Business Consulting Ltd | London | 2015 |
| Galtebo Limited | London | 2006 |
| Galton Contractors Limited | Chandlers Ford | 2004 |
| Galton Court Management Company Limited | Rugeley | 2005 |
| Galton Limited | Harrogate | 2025 |
| Galwally Mews Management Limited | Belfast | 2008 |
| Galway Natural Health Company Limited | London | 2017 |
| Galway Park Management Company Limited | Belfast | 1999 |
| GAM Management Ltd | Market Rasen | 2020 |
| GAM Secretaries Limited | | 2007 |
| Gama Machinery Ltd | Beckenham | 2014 |
| Gambalunghino Limited | Stockport | 1994 |
| Gamber Produce Limited | Hereford | 1993 |
| Gamble DE Grussa Ltd | Stockton-On-Tees | 2004 |
| Gambling Ltd | London | 2002 |
| Gamblits Limited | Staffordshire | 1999 |
| Gamdesigners Ltd | Manchester | 2018 |
| Game Bird Shooting Limited | Camberley | 2013 |
| Game Hunter International Limited | Fordham Ely | 2018 |
| Game Ltd | Stoke-On-Trent | 2025 |
| Game of Thrones Location Tours Limited | Trafford Park | 1975 |
| Game SET and Tax Limited | London | 2020 |
| Gamecape Limited | London | 1991 |
| Gamechanger Technologies Limited | Richmond | 2015 |
| Gamenese Limited | Sleaford | 2025 |
| Gameplan Ltd | Tadworth | 2021 |
| Gameplay Events Limited | Oldham | 2021 |
| Games for Good Causes PLC | London | 1993 |
| Games Kingdom Ltd | Hartlepool | 2021 |
| Games Master GEM Limited | Worthing | 2021 |
| Games Talk Limited | Swindon | 2004 |
| Gameset Limited | Harrow | 2005 |
| Gamet Technology Ltd | Beckenham | 2024 |
| Gaming 4 Life Limited | London | 2023 |
| Gaming Ventures International Limited | London | 2011 |
| Gamingbible Limited | Manchester | 2016 |
| Gamma Capital Limited | Caterham | 2009 |
| Gamma for Trading & Services Limited | Manchester | 2026 |
| Gamma GR Limited | London | 2016 |
| Gamma Photos Limited | Harrogate | 2011 |
| Gamma RAY Ltd | London | 2021 |
| Gamma Rise Capital Ventures Ltd | Manchester | 2026 |
| Gamville Ltd | Salford | 2008 |
| GAN Collective Ltd | London | 2025 |
| Gancrest Limited | London | 1982 |
| Gandaduo (UK) Plant Nutrition Ltd | Manchester | 2023 |
| Gander 1956 Limited | London | 2014 |
| Ganesha Healthcare Limited | Chorley | 2012 |
| Ganesha Indian Restaurant Private Limited | Bristol | 2007 |
| Ganga DIN Limited | Derby | 2003 |
| Gangcheng International Co., Ltd. | Beckenham | 2020 |
| Gangdi Enterprise Limited | London | 2017 |
| Ganlax Investments Ltd | London | 2017 |
| Gannel View Investments Limited | London | 2014 |
| Gannett U.K. Limited | Bournemouth | 1999 |
| Gannolex Pavilion Limited | Bicester | 1976 |
| Gantech Industry Co., Ltd | Coventry | 2014 |
| GAO DI Trade Co., Ltd | Beckenham | 2016 |
| Gaosheng Clothing Co., Ltd | Manchester | 2023 |
| GAP Carpentry Limited | Walsham-Le-Willows | 2025 |
| GAP Distribution Limited | Guildford | 2018 |
| GAP Global Systems Ltd | Kingston Upon Thames | 2000 |
| GAP Group International Limited | Retford | 2018 |
| GAP Online Limited | Poole | 2021 |
| GAP Property Investments Limited | Selby | 2012 |
| GAP V Ltd | Liverpool | 2020 |
| GAP Vehicle Hire Limited | Glasgow | 2014 |
| Gapdaemon Limited | Gateshead | 2009 |
| Gapdaemon UK Limited | Gateshead | 2010 |
| Gapped Ltd | Cwmbran | 2022 |
| Gapuma (UK) Limited | Milton Keynes | 1999 |
| GAR Training Limited | Leicester | 2006 |
| Garage Door Fixed (NI) Ltd | Mansfield | 2018 |
| Garage Doors Fixed Ltd | Mansfield | 2018 |
| Garage Owners Network Limited | Milton Keynes | 2019 |
| Garbh Choire Limited | Glasgow | 2021 |
| Garboys Management Ltd | Edinburgh | 2010 |
| Garbstore Limited | London | 2006 |
| Garbutt Heaters Limited | Middlesbrough | 2006 |
| Garchi International Ltd | Morecambe | 2019 |
| Garda Industries Limited | Brentwood | 2010 |
| Garden 1959 Limited | East Grinstead | 2013 |
| Garden and House Limited | Harrogate | 2012 |
| Garden at Trade Limited | Needham Market | 1996 |
| Garden Avenue Management Company Limited | Ballymena | 2000 |
| Garden Cafe (Penge) Limited | Royal Victoria Docks | 2015 |
| Garden Centre Plants Limited | Preston | 1969 |
| Garden DR Limited | Aldington | 2018 |
| Garden Exposures Photo Library Limited | Richmond | 2001 |
| Garden Genesis Limited | Gloucester | 2020 |
| Garden Glamping Ltd | Uxbridge | 2019 |
| Garden House Midlands Ltd | Birmingham | 2022 |
| Garden Industrial (China) Co., Ltd | Beckenham | 2018 |
| Garden Joy Co., Ltd | Cambridge | 2010 |
| Garden Lounge Roof Limited | Leyland | 2013 |
| Garden Master Limited | Dunmow | 2019 |
| Garden of England Foods Ltd | Sittingbourne | 2013 |
| Garden of England Preserving Company Limited | Kent | 1986 |
| Garden of Ideas Limited | London | 2014 |