| Greens & Others Community Cookery School CIC | Hospitality | 2023 |
| Greens Repairs Ltd | Manufacturing | 2026 |
| Greenside Building Ltd | Construction | 2024 |
| Greenside Mini Market Limited | Wholesale & retail | 2016 |
| Greenside Packaging Services Limited | Administrative & support | 2003 |
| Greenside Way Propco Limited | Real estate | 2017 |
| Greensmed Ltd | Health & social care | 2013 |
| Greenstand Limited | Other services | 2017 |
| Greenstone Industries Limited | Construction | 2024 |
| Greenstone Investments (NW) Ltd | Real estate | 2024 |
| Greenswitch Solutions Ltd | Manufacturing | 2010 |
| Greenteam (MCR) Ltd | Wholesale & retail | 2024 |
| Greentec Auto Limited | Water & waste | 2025 |
| Greentech Renewable Solutions Limited | Professional & scientific | 2025 |
| Greentech Renewables Ltd | Construction | 2020 |
| Greentext Limited | Other services | 2017 |
| Greentown Holdings (UK) Limited | Financial services | 2016 |
| Greentown Investments (UK) Limited | Professional & scientific | 2016 |
| Greentree Capital Limited | Financial services | 2018 |
| Greentree Investments Ltd | Real estate | 2024 |
| Greenuna Accountants Ltd | Extraterritorial | 2023 |
| Greenuna Tax Ltd | Professional & scientific | 2023 |
| Greenvale (Services) Limited | Information & communication | 1986 |
| Greenvale Court Limited | Households | 1970 |
| Greenventuretech Ltd. | Wholesale & retail | 2025 |
| Greenview Investments Ltd | Real estate | 2020 |
| Greenview Properties Limited | Real estate | 2012 |
| Greenwave Logistics Ltd | Transport & logistics | 2026 |
| Greenway IT UK Ltd | Other services | 2023 |
| Greenway Solution Ltd | Wholesale & retail | 2026 |
| Greenwell Cottage Ltd | Real estate | 2023 |
| Greenwich Company Management Ltd | Wholesale & retail | 2025 |
| Greenwood & Co Surveyors Limited | Professional & scientific | 2011 |
| Greenwood Capital Advisory Limited | Financial services | 2022 |
| Greenwood Capital Holdings Limited | Financial services | 2025 |
| Greenwood Capital Lending Limited | Financial services | 2025 |
| Greenwood Capital Technologies Limited | Information & communication | 2025 |
| Greenwood Holdings PVT Limited | Construction | 2026 |
| Greenwood Mortgages Ltd | Financial services | 2021 |
| Greenwood Scaffolding Limited | Construction | 2011 |
| Greenwork SA Ltd | Wholesale & retail | 2022 |
| Greeta Ltd | Administrative & support | 2024 |
| Greetham Management Company Limited | Households | 2016 |
| Greg Stanfield & Company Ltd | Professional & scientific | 2025 |
| Greg&Edi Ltd | Construction | 2024 |
| Gregory COO Ltd | Construction | 2014 |
| Gregory's Laundry Ltd | Administrative & support | 2022 |
| Gregory-Coverdale (SK13) Limited | Construction | 2013 |
| Gregrep Europe Limited | Construction | 2020 |
| Greise a Limited | Wholesale & retail | 2025 |
| Grenavale Limited | | 1983 |
| Grenoble Enterprises Ltd | Real estate | 2019 |
| Gresham Mill Management Company Limited | Households | 2003 |
| Greta Budryte Ltd | Professional & scientific | 2023 |
| Grexall Ltd | Information & communication | 2019 |
| Grey & Disemor Projects-Con Limited | Construction | 2019 |
| Grey Area Books Ltd | Wholesale & retail | 2024 |
| Grey Box Studio Limited | Professional & scientific | 2014 |
| Grey Horse Inn Limited | Real estate | 2018 |
| Grey House Cleaning Limited | Administrative & support | 2019 |
| Grey Knight Solutions Ltd | Construction | 2021 |
| Grey Lantern Events Limited | Arts & recreation | 2025 |
| Grey Look Ltd | Wholesale & retail | 2018 |
| Grey Mobiles Ltd | Wholesale & retail | 2025 |
| Grey Rigg Cottage Ltd | Real estate | 2018 |
| Grey Task International Ltd | Other services | 2016 |
| Grey Task Originals Ltd | Information & communication | 2015 |
| Grey Tech Ltd | Wholesale & retail | 2023 |
| Grey Vine Limited | Information & communication | 2023 |
| Grey Wolf Search Ltd | Administrative & support | 2020 |
| Grey Wolf Transport Ltd | Transport & logistics | 2026 |
| Greycrest Limited | Wholesale & retail | 1990 |
| Greydient Analytics Ltd | Information & communication | 2023 |
| Greyfern Law Limited | Professional & scientific | 2008 |
| Greyfoxx Homes Limited | Real estate | 2019 |
| Greyfriars Capital Ltd | Real estate | 2017 |
| Greyhawks Ltd | Wholesale & retail | 2026 |
| Greyhound Interiors Ltd | Professional & scientific | 2023 |
| Greyleaf Enterprise Ltd | Administrative & support | 2023 |
| Greyline Investigations Limited | Administrative & support | 2026 |
| Greyline Live Ltd | Arts & recreation | 2021 |
| Greystar Homes Ltd | Construction | 2024 |
| Greystoke Financial Services Ltd | Professional & scientific | 2023 |
| Greystoke Properties Ltd | Real estate | 2023 |
| Greystoke Property Services Ltd | Construction | 2022 |
| Greystokes Management Company Limited | Households | 2003 |
| Greystone Construction Solutions Limited | Construction | 2016 |
| Greystone Consulting Limited | Administrative & support | 2002 |
| Greystone House Brands Limited | Financial services | 2022 |
| Greystone House Limited | Financial services | 2022 |
| Greystone Properties NW Ltd | Construction | 2022 |
| Greystone Road (Developments) Limited | Construction | 2025 |
| GREYSTONES786 Limited | Real estate | 2025 |
| Greytex Limited | Other services | 2018 |
| Grfixer Ltd | Professional & scientific | 2017 |
| GRG Global Serv Ltd | Construction | 2026 |
| GRG Operations Ltd | Wholesale & retail | 2025 |
| Gribes Ltd | Wholesale & retail | 2023 |
| Grice and Foster Linen Services Ltd | Other services | 2019 |
| Grid Innovations Ltd | Other services | 2021 |