| Glenn Bridge Ltd | Professional & scientific | 2015 |
| Global Detection Solutions Ltd | Administrative & support | 2022 |
| Global Finance and Properties Limited | Construction | 2005 |
| Global Private Rating Company "Standardrating" Ltd | Administrative & support | 2010 |
| Global Safetywatch - Viseum Ethical AI Limited | Information & communication | 2004 |
| Globus Solutions Limited | Wholesale & retail | 2023 |
| Gloss & Go Detailing Ltd | Wholesale & retail | 2025 |
| Gloucester Restaurant Group Ltd | Hospitality | 2025 |
| Glowbeast Ltd | Information & communication | 2016 |
| GM & Sons (Property) Ltd | Real estate | 2022 |
| GM Management Consultant Ltd | Professional & scientific | 2018 |
| Gmaks Enterprises Ltd | Real estate | 2022 |
| GMC Alliance LLP | | 2003 |
| GNS Marketing Limited | Administrative & support | 2016 |
| GO2 Hotels Limited | Hospitality | 2024 |
| Goat Films Limited | Information & communication | 2020 |
| Goel Associates Ltd | Information & communication | 2025 |
| Gold Leaf Consulting Ltd | Other services | 2023 |
| Golden Fern Ltd | Real estate | 2023 |
| Goldkey Estates Limited | Real estate | 2011 |
| Goldman Blackz Ltd | Real estate | 2019 |
| Goldman Group Ltd | Administrative & support | 2020 |
| Goldstar Media Limited | Other services | 2018 |
| Goldstream Limited | Real estate | 2016 |
| Gondo Ascend Ltd | Wholesale & retail | 2025 |
| Googol Accounting Ltd | Professional & scientific | 2012 |
| Gorilla Circus Limited | Arts & recreation | 2007 |
| Gounoubi's Limited | Real estate | 2022 |
| Gouvras Knowledge & Networks Ltd | Professional & scientific | 2026 |
| GPS Security Limited | Administrative & support | 2019 |
| Graceful Pilates Ltd | Arts & recreation | 2025 |
| Gracenest Ltd | Health & social care | 2025 |
| Gracewood Ltd | Professional & scientific | 2018 |
| Graham F Whybrow (Business Services) Limited | Professional & scientific | 1981 |
| Graham Goldsmith Consulting Limited | Professional & scientific | 2021 |
| Graham Welding Construction (PB) Limited | Manufacturing | 2009 |
| Grand Island Limited | Professional & scientific | 2016 |
| Grand Loft Design Ltd | Other services | 2017 |
| Grand Melodies Ltd | Information & communication | 2023 |
| Grange (Whitefield) Care Services Limited | Health & social care | 2010 |
| Grange Whitefield Care Limited | Health & social care | 2015 |
| Grangemoor Builders Ltd | Construction | 1987 |
| Granvillewords Limited | Arts & recreation | 2009 |
| Graphic Image Solutions Limited | Manufacturing | 2008 |
| Graphite Homes Limited | Professional & scientific | 2008 |
| Grayda Services Ltd | Information & communication | 2024 |
| Great British Teddy Bear Holdings Limited | Financial services | 2026 |
| Great DON Ltd | Manufacturing | 2018 |
| Great Place to Stay Ltd | Real estate | 2014 |
| Great Wincey Farm Management Company Limited | Financial services | 2024 |
| Great Wood Products Limited | Professional & scientific | 2010 |
| Greatbrook Developments Limited | Administrative & support | 2002 |
| Greater Systems Ltd | Information & communication | 2014 |
| Greekbeat Radio Limited | Professional & scientific | 2016 |
| Green Light Locations Limited | Information & communication | 2026 |
| Green Monday Ltd | Administrative & support | 2015 |
| Green Ohms Electrical Services Ltd | Construction | 2022 |
| Green Papaya (UK) Ltd | Hospitality | 2023 |
| Green Savannah Sustainable Foods Ltd | Wholesale & retail | 2025 |
| Green Star Engineering Services Limited | Professional & scientific | 2020 |
| Greenhearth Design Studio Limited | Wholesale & retail | 2026 |
| Greenlife Energy Limited | Real estate | 2020 |
| Greenr Developments Ltd | Administrative & support | 2023 |
| Greenton Fields Ltd | Real estate | 2022 |
| Greenview Healthcare Limited | Administrative & support | 2005 |
| Greenview Healthcare Properties Limited | Real estate | 2026 |
| Gregsons Imports Ltd | Wholesale & retail | 2017 |
| Grenache Limited | Real estate | 2006 |
| Gresley Court (Potters Bar) Management Company Limited | Administrative & support | 1971 |
| Gresley London Ltd | Administrative & support | 2018 |
| Greyinsights Ltd | Health & social care | 2018 |
| Gridcuff Integrated Services Ltd | Other services | 2025 |
| Griffith & Yelland Electrical Contractors Ltd | Construction | 2008 |
| Griffiths Automotive Ltd | Wholesale & retail | 2026 |
| Grim Consulting Limited | Professional & scientific | 2005 |
| Grosvenor Beaumont Financial Planning Limited | Financial services | 2007 |
| Grosvenor Beaumont Financial Services Limited | Financial services | 2005 |
| Groupartist Ltd | Other services | 2020 |
| Grove Garage (Chingford) Limited | Wholesale & retail | 1966 |
| Grumpy Granny Bake and Brew Ltd | Wholesale & retail | 2023 |
| Gruppo Find Ltd | Administrative & support | 2018 |
| GS Renovation Ltd | Construction | 2023 |
| Gscs Services Ltd. | Administrative & support | 2014 |
| GSL Advisory Ltd | Professional & scientific | 2020 |
| GSR Property Management Ltd | Real estate | 2025 |
| GST Ponds & Landscaping Limited | Professional & scientific | 2026 |
| Gtmp Ltd | Information & communication | 2025 |
| GTR Beauty Limited | Wholesale & retail | 2019 |
| Guardian Monitoring Services Limited | Construction | 2025 |
| Guardian Wills and Probate Services Limited | Other services | 2011 |
| Guberan Capital LLP | | 2023 |
| Guberan Partners LLP | | 2019 |
| Guild of Investment Managers Ltd | Other services | 2016 |
| Guppy Properties Ltd | Real estate | 2016 |
| Gwalia Education Ltd | Education | 2021 |
| H & Z Corporation Limited | Wholesale & retail | 2006 |
| H . Solomon Ltd | Health & social care | 2022 |
| H a T for Goods Ltd | Wholesale & retail | 2025 |
| H Lawrence Diamonds Ltd | Wholesale & retail | 2022 |
| H.B.E.P.L. Limited | Households | 1966 |