| GPM 2000 Ltd | Construction | 2016 |
| Gpowermanagement Ltd | Construction | 2024 |
| GQ Capital Limited | Real estate | 2018 |
| GR Controls Limited | Professional & scientific | 2021 |
| GR Digital Solutions Ltd | Professional & scientific | 2026 |
| GR Engineers Ltd | Professional & scientific | 2016 |
| Graaz Ventures Ltd | Health & social care | 2017 |
| Grab Talent Limited | Information & communication | 2024 |
| Grace Court Property Management Limited | Households | 2024 |
| Grace Dynamics Ltd | Real estate | 2021 |
| Grace Global Services Ltd | Hospitality | 2025 |
| GRACE2GRACEPROPERTY Ltd | Real estate | 2022 |
| Gracenest Apartments Ltd | Hospitality | 2024 |
| Gracias Global Ltd | Real estate | 2017 |
| Gracias Global Properties Ltd | Real estate | 2022 |
| Gracieluxe Limited | Other services | 2018 |
| Gradans Hardware Ltd | Wholesale & retail | 2019 |
| Grade One Glazing Limited | Construction | 2023 |
| Graft Mafia Ltd | Health & social care | 2025 |
| Grand Events House Limited | Hospitality | 2025 |
| Grand Maison Limited | Real estate | 2025 |
| Grand Property Limited | Real estate | 2018 |
| Grandline Rail Services Limited | Construction | 2026 |
| Grange Distributors (Romford) Ltd | Wholesale & retail | 2005 |
| Grange Gardens Block Management Limited | Households | 2024 |
| Grange Interiors Limited | Other services | 1998 |
| Grangewood Autos Ltd | Other services | 2000 |
| Grangewood Plastic Packaging Limited | Manufacturing | 1946 |
| Grant Works Ltd | Construction | 2025 |
| Granting Group Ltd | Financial services | 2023 |
| Grape & FIG Limited | Hospitality | 2019 |
| Gratian Services Limited | Administrative & support | 2019 |
| Gravesend Steel Limited | Construction | 2024 |
| Gravisense Limited | Wholesale & retail | 2023 |
| Gravitea Ltd | Hospitality | 2021 |
| Gravitec Construction Ltd | Construction | 2024 |
| Gravitec Ltd | Construction | 2023 |
| Gray Coat Productions Ltd | Information & communication | 2025 |
| Gray Housing Ltd | Real estate | 2025 |
| Grayfield International Limited | Real estate | 2018 |
| Grayfield Solicitors Limited | Professional & scientific | 2019 |
| Grayfox Consulting Ltd | Information & communication | 2026 |
| Grays Autocenters Ltd | Wholesale & retail | 2012 |
| Graystone Estates Limited | Construction | 2020 |
| Graystone Property Services Limited | Real estate | 1973 |
| Grayzer Limited | Transport & logistics | 2014 |
| Grazing Tiffin Limited | Hospitality | 2022 |
| GRC Top Logistics Ltd | Transport & logistics | 2021 |
| Great Africa Ltd | Hospitality | 2021 |
| Great Child Company Limited | Education | 2013 |
| Great Child Property Limited | Real estate | 2024 |
| Great Interiors Limited | Construction | 2017 |
| Great Wall Cuisine Limited | Hospitality | 2022 |
| Great Work Construction Ltd | Construction | 2025 |
| Great Yarmouth Property Ltd | Real estate | 2024 |
| Greatarch Ltd | Administrative & support | 1996 |
| Greatchild Healthcare Ltd | Health & social care | 2023 |
| Greater LDN Card Show Ltd | Administrative & support | 2025 |
| Greater London Drivers Association Limited | Other services | 2017 |
| Greatest Estate Limited | Real estate | 2023 |
| Greatfield Property Limited | Real estate | 2023 |
| Greek Camberley Limited | Hospitality | 2025 |
| Greek Guilford Limited | Hospitality | 2025 |
| Green & Black MEP Limited | Professional & scientific | 2025 |
| Green Bird Property Limited | Real estate | 2023 |
| Green Certify Group Limited | Construction | 2026 |
| Green Compared Ltd | Energy | 2016 |
| Green CUT 2023 Ltd | Administrative & support | 2023 |
| Green Eco Plumbing & Heating Limited | Construction | 2016 |
| Green Fresh Fruit & Vegetable Limited | Wholesale & retail | 2016 |
| Green Grass Essex Limited | Administrative & support | 2016 |
| Green Grass Herts Limited | Administrative & support | 2022 |
| Green Koala Ltd. | Health & social care | 2023 |
| Green Lane Food & Wine Limited | Wholesale & retail | 2021 |
| Green Lotus Retail Ltd | Wholesale & retail | 2024 |
| Green Parrot Homes Limited | Real estate | 2026 |
| Green Parrot Marine Limited | Professional & scientific | 2015 |
| Green Plus Energy Solutions Limited | Construction | 2025 |
| Green River Restaurant Ltd | Hospitality | 2003 |
| Green Route Developments Limited | Real estate | 2026 |
| Green Thumb 3 Ltd. | Health & social care | 2025 |
| Green-It-Recycling Ltd | Wholesale & retail | 2010 |
| Greencare Garden Services Ltd | Construction | 2008 |
| Greenfield Solicitors Limited | Professional & scientific | 2020 |
| Greenflo Gardens & Build Limited | Manufacturing | 2025 |
| Greenford Capital Ltd | Real estate | 2017 |
| Greenford Trading Limited | Wholesale & retail | 2024 |
| Greenhit Ltd | Wholesale & retail | 2022 |
| Greenhouse Heating Ltd | Construction | 2023 |
| Greenhouse Water Gardens Ltd | Wholesale & retail | 2019 |
| Greenlane Shop Ltd | Administrative & support | 2026 |
| Greenleaf Packaging Limited | Wholesale & retail | 2022 |
| Greenline Distribution Ltd | Wholesale & retail | 2025 |
| Greenly Group Ltd | Construction | 2018 |
| Greens Fishmongers Essex Ltd | Hospitality | 2019 |
| Greenstead Road Developments Limited | Real estate | 2025 |
| Greenstone Innovations Ltd | Professional & scientific | 2025 |
| Greenwich Marine Limited | Professional & scientific | 2024 |
| Greenwich Private Doctors Limited | Health & social care | 2023 |
| Grenix Ltd | Construction | 2026 |