| Grafton Property Limited | Real estate | 1997 |
| Gramadi Place Limited | Wholesale & retail | 2012 |
| Grambashi Ltd | Transport & logistics | 2021 |
| Granbee Estates Limited | Real estate | 2014 |
| Grand Design Studio Ltd | Professional & scientific | 2024 |
| Grand Food Catering Limited | Hospitality | 2026 |
| Grand Spice Ltd | Hospitality | 2026 |
| Grandstation Limited | Extraterritorial | 2013 |
| Grange Homes Estate Agents Ltd | Real estate | 2011 |
| Granite Direct Limited | Wholesale & retail | 2007 |
| Grantsu Ltd | Information & communication | 2020 |
| Graphics Inc Ltd | Professional & scientific | 2024 |
| Gravity Enterprise Ltd | Financial services | 2021 |
| Gravon Ltd | Construction | 2022 |
| Grays Inn Food Ltd | Hospitality | 2025 |
| Grays of Enfield Ltd | Wholesale & retail | 2018 |
| Great Beginnings Montessori Limited | Education | 2010 |
| Great Building Solution Ltd | Construction | 2021 |
| Great Cambridge Road (Cheshunt) Management Company Limited | Households | 2019 |
| Great Elshaddai Integrated Services Ltd | Construction | 2023 |
| Great Managers Limited | Professional & scientific | 2004 |
| Greater London Demolition Group Limited | Construction | 2018 |
| Greater London Demolition Limited | Construction | 1993 |
| Greater London Environmental Limited | Construction | 2006 |
| Greater London Waste Disposal Limited | Water & waste | 1997 |
| Greatest Minds LDN CIC | Education | 2023 |
| Grecian Artisan Wine Co. Ltd | Wholesale & retail | 2024 |
| Greek Eat&Cyprus Pitta Ltd | Hospitality | 2024 |
| Greek Reality Ltd | Hospitality | 2020 |
| Green Chair Artist Growth Ltd | Professional & scientific | 2026 |
| Green Construct (Liphook) Limited | Construction | 2014 |
| Green Core Cleaning Ltd | Administrative & support | 2026 |
| Green Cycle Training C.I.C. | Other services | 2023 |
| Green Dragon Trees Limited | Wholesale & retail | 2023 |
| Green Land Commerce Ltd | Wholesale & retail | 2026 |
| Green Locker Ltd | Wholesale & retail | 2025 |
| Green Oak Surveyors Limited | Professional & scientific | 2020 |
| Green Olive Care Ltd | Health & social care | 2021 |
| Green on the Lanes Ltd | Wholesale & retail | 2023 |
| Green Path & Partners Limited | Professional & scientific | 2024 |
| Green Planet Services Limited | Wholesale & retail | 2015 |
| Green Salad Ltd | Wholesale & retail | 2019 |
| Green Street Hand Car Wash Ltd | Other services | 2026 |
| Green Tick Property Group Ltd | Real estate | 2021 |
| Green Vending Ltd | Wholesale & retail | 2017 |
| Greenberg Electrical Limited | Construction | 2025 |
| Greencloud Consulting Ltd | Professional & scientific | 2026 |
| Greencycle Solutions Limited | Wholesale & retail | 2008 |
| Greener Schools Community Interest Company | Professional & scientific | 2024 |
| Greenestateenfield Limited | Real estate | 2025 |
| Greenie Cleaning Service Ltd | Households | 2014 |
| Greenlea Property Solutions Ltd | Professional & scientific | 2015 |
| Greenlight Walk Ltd | Health & social care | 2023 |
| Greenora Ltd | Wholesale & retail | 2025 |
| Greenplace Healthcare Ltd | Transport & logistics | 2023 |
| Greensail International Limited | Professional & scientific | 2010 |
| Greenway Corporation Limited | Construction | 2000 |
| Greg Kessler Equities Limited | Real estate | 2015 |
| Gregcar Ltd | Wholesale & retail | 2025 |
| Gregory Building Ltd | Construction | 2019 |
| Gregorz Properties Limited | Real estate | 2004 |
| Grevada Transport Limited | Transport & logistics | 2021 |
| Gridify Marketing Global Ltd | Professional & scientific | 2025 |
| Gridline Electrical & Fire Services Ltd | Manufacturing | 2024 |
| Grill 79 Ltd | Hospitality | 2015 |
| Grilled Meat Co Ltd | Hospitality | 2024 |
| Grind Homes Limited | Real estate | 2025 |
| Grotrics Ltd | Administrative & support | 2025 |
| Ground Force Pro Ltd | Administrative & support | 2022 |
| Groundwork Gardening.Com Limited | Administrative & support | 2008 |
| Grove Foods Ltd | Hospitality | 2010 |
| Groveace Limited | Hospitality | 1996 |
| Grovegreen Apartments Limited | Households | 2024 |
| Grovelands Court (Southgate) Limited | Hospitality | 1998 |
| Grovelands Leisure Holdings Limited | Hospitality | 2022 |
| Grovestream Limited | Administrative & support | 2002 |
| Growing Plants 4U Ltd. | Wholesale & retail | 2013 |
| Growth Medical Limited | Wholesale & retail | 2016 |
| Grub Enfield Ltd | Hospitality | 2026 |
| GRV Plumbing & Heating Limited | Construction | 2014 |
| Gryphon Boats Ltd | Manufacturing | 2018 |
| GS Event and Marketing Solutions Ltd | Information & communication | 2018 |
| GS Mortgage Solutions Ltd | Financial services | 2010 |
| GS Painting Decorating and Gardening Services Ltd | Construction | 2025 |
| GS40 Ltd | Other services | 2017 |
| GSA Retail Limited | Wholesale & retail | 2020 |
| GSA Universal Technology Solutions Ltd | Information & communication | 2023 |
| GSG Law Limited | Professional & scientific | 2016 |
| GSL Productions Ltd | Information & communication | 2017 |
| GSR Beyond Building Ltd | Construction | 2026 |
| GSS Construct Ltd | Construction | 2020 |
| Gssg UK Limited | Wholesale & retail | 2020 |
| GST Entertainment Limited | Other services | 2025 |
| GT Media Digital Ltd | Professional & scientific | 2022 |
| GT Trading Worldwide Ltd | Professional & scientific | 2015 |
| GTO Property Limited | Administrative & support | 2017 |
| Gualtieri Property Investment LLP | | 2023 |
| Guaranteed Rent Limited | Real estate | 2009 |
| Guardian Chauffeur Drive Ltd | Transport & logistics | 2022 |
| Guardian Properties Surrey Limited | Real estate | 2025 |