| Greenfingers Tree & Landscapes Ltd | Administrative & support | 2026 |
| Greenforge Garden Tools Ltd | Wholesale & retail | 2026 |
| Greenfusion Environmental Ltd | Construction | 2024 |
| Greengrove Medical Ltd | Health & social care | 2021 |
| Greengrow Global Ltd | Wholesale & retail | 2025 |
| Greenhaven Builders Limited | Construction | 2024 |
| Greenheart Kitchens Limited | Manufacturing | 2009 |
| Greenhill Contracting Ltd | Construction | 2021 |
| Greenhill Court Estates Management Limited | Real estate | 2025 |
| Greenimpactsolution Ltd | Professional & scientific | 2024 |
| Greenisle Wealth Ltd | Professional & scientific | 2018 |
| Greenkeeper Ltd | Other services | 2023 |
| Greenland Business Services Limited | Information & communication | 2013 |
| Greenland Crescent Management Company Limited | Households | 1982 |
| Greenlands Services Ltd | Administrative & support | 2016 |
| Greenlands View Services Limited | Administrative & support | 2018 |
| Greenleaf Tree & Property Services Limited | Administrative & support | 2026 |
| Greenline Building Services Limited | Construction | 2019 |
| Greenlit Capital Limited | Financial services | 2018 |
| Greenlower Ltd | Transport & logistics | 2019 |
| Greenmark Consulting Limited | Information & communication | 2017 |
| Greenmark Invest Ltd | Real estate | 2018 |
| Greenmeadow Gardens Management Ltd | Households | 2026 |
| Greenplus Properties Limited | Real estate | 2016 |
| Greenrock Cronus Capital (UK) Ltd | Financial services | 2025 |
| Greenrock Cronus Private Finance Ltd | Financial services | 2025 |
| Greens CNC Limited | Manufacturing | 2019 |
| Greens Executive Travel Limited | Transport & logistics | 2014 |
| Greens H2O Hire Holdings Ltd | Water & waste | 2020 |
| Greens H2O Road Tanker Hire Ltd | Water & waste | 2020 |
| Greens Team Cymru Ltd | Administrative & support | 2019 |
| Greenscape Design and Build Solutions Ltd | Construction | 2025 |
| Greenscape Systems Ltd | Professional & scientific | 2023 |
| Greenshoots Management Services Ltd | Real estate | 2014 |
| Greenshoots Property LLP | | 2025 |
| Greenstone Building Services LLP | | 2023 |
| Greenstone Property Limited | Real estate | 2021 |
| Greenstream Flooring CIC | Water & waste | 2008 |
| Greenstuff (UK) Limited | Wholesale & retail | 2016 |
| Greentech Energy UK Ltd | Manufacturing | 2019 |
| Greenup International PC | | 2019 |
| Greenveda Limited | Wholesale & retail | 2025 |
| Greenvio Ltd | Wholesale & retail | 2026 |
| Greenway 21 (Wales) Ltd | Construction | 2021 |
| Greenway 21 Ltd | Construction | 2018 |
| Greenway Bristol Limited | Households | 2020 |
| Greenway Court Limited | Real estate | 2020 |
| Greenway Racing Solutions Ltd | Information & communication | 2024 |
| Greenwells Property Ltd | Professional & scientific | 2003 |
| Greenwich PT Limited | Information & communication | 2025 |
| Greenwichs Group Ltd | Transport & logistics | 2017 |
| Greenwood & Lyle Corporation Limited | Information & communication | 2016 |
| Greeting Pine Limited | Wholesale & retail | 2025 |
| Greg Beynon Photography Ltd | Professional & scientific | 2024 |
| Gregson Green Ltd | Wholesale & retail | 2021 |
| Grelotte Ltd | Wholesale & retail | 2024 |
| Grenertia Ltd | Professional & scientific | 2025 |
| Grenoside Group Limited | Extraterritorial | 2026 |
| Gresham Designs Limited | Information & communication | 2025 |
| Grevontiaq Ltd | Wholesale & retail | 2025 |
| Grey & Graham Limited | Professional & scientific | 2025 |
| Grey Bardine Ltd | Wholesale & retail | 2023 |
| Grey Globe Ltd | Construction | 2017 |
| Grey Structures Ltd | Administrative & support | 2019 |
| Greyfen Studio Limited | Professional & scientific | 2025 |
| Greyfield Limited | Professional & scientific | 2012 |
| Greyknight Capital Limited | Financial services | 2024 |
| Greyline Management Ltd | Real estate | 2023 |
| Greyside Ltd | Other services | 2019 |
| Greystoke SRG Limited | Administrative & support | 2022 |
| Greywillow Limited | Health & social care | 2001 |
| Greywolf Global Procurement Ltd | Wholesale & retail | 2025 |
| GRH Matrix Ltd | Wholesale & retail | 2026 |
| GRH Pharma Limited | Wholesale & retail | 2022 |
| GRI Catalyst Ltd | Professional & scientific | 2026 |
| GRI Technology Limited | Information & communication | 2025 |
| Grid Global Limited | Information & communication | 2003 |
| Grid Guru Group Ltd | Administrative & support | 2023 |
| Grid Property & Asset Management Ltd | Real estate | 2021 |
| Grietbe Recruits Ltd | Other services | 2019 |
| Grieve&Grieve Limited | Professional & scientific | 2015 |
| Griffhaus Co Limited | Wholesale & retail | 2026 |
| Griffin Electrical Contracting Ltd | Construction | 2020 |
| Griffin Plastering Services Limited | Construction | 2016 |
| Griffith & Roberts Holdings UK Limited | Financial services | 2024 |
| Griffith Education Bond Ltd | Education | 2025 |
| Griffiths Brothers Masonry Limited | Construction | 2019 |
| Griffiths Fabrications Ltd | Manufacturing | 2023 |
| Griffiths Molloy Ltd | Water & waste | 2016 |
| Griffiths Property Group Ltd | Real estate | 2024 |
| Grill "N" Smoke Ltd | Hospitality | 2025 |
| Grill House Cardiff Ltd | Hospitality | 2019 |
| Grill Ready Goods Limited | Wholesale & retail | 2025 |
| Grillaz Preston Ltd | Hospitality | 2016 |
| Grillbox Ltd | Manufacturing | 2020 |
| Griller Chicken Brighton Ltd | Hospitality | 2024 |
| Grimas ROB Ltd | Wholesale & retail | 2019 |
| Grimmon Ltd | Financial services | 2020 |
| GRIMY2SHINY Ltd | Administrative & support | 2020 |
| Grindlab Ltd | Wholesale & retail | 2025 |