| GPR Recruitment Limited | Administrative & support | 2021 |
| GPS Fleet Ltd | Wholesale & retail | 2021 |
| GPS Plant Hire Limited | Administrative & support | 2026 |
| GR Film Productions Limited | Information & communication | 2022 |
| GR Mechanical Special Projects Ltd | Construction | 2022 |
| GR OAS Ltd | Construction | 2019 |
| Grab N Go Packaging Ltd | Administrative & support | 2024 |
| Grace & Danger Ltd. | Information & communication | 2015 |
| Grace & Master Limited | Information & communication | 2025 |
| Grace Capital Group Ltd | Real estate | 2025 |
| Grace Difford Photography Ltd | Professional & scientific | 2024 |
| Grace Eagle Ltd | Construction | 2014 |
| Grace Enterprise Ltd | Other services | 2023 |
| Grace Group of Hotels Limited | Hospitality | 2009 |
| Grace Merchants Ltd | Wholesale & retail | 2026 |
| Grace News Ltd | Wholesale & retail | 2021 |
| Grace Pham Photography Ltd | Professional & scientific | 2025 |
| Grace Productions Limited | Information & communication | 2003 |
| Grace Rekords Ltd | Information & communication | 2018 |
| Grace Touch Ltd | Information & communication | 2024 |
| Graceford UK Ltd | Financial services | 2025 |
| Graceway Properties Ltd | Real estate | 2023 |
| Graceway Services Ltd | Transport & logistics | 2015 |
| Gracewood Construction Limited | Construction | 2013 |
| Gracewood Group LLP | | 2009 |
| Gracewood Mile END Regeneration Limited | Construction | 2019 |
| Gracewood Property Group Limited | Financial services | 2019 |
| Gracie & Flavour Ltd | Hospitality | 2020 |
| Graduate College England Ltd | Education | 2018 |
| Graffin Technologies UK Ltd | Manufacturing | 2021 |
| Grafix Guru Ltd | Professional & scientific | 2025 |
| Graft-Barda Ltd | Professional & scientific | 2023 |
| Grafton Property Management Limited | Real estate | 2007 |
| Graham Court(Ealing)Property Management Co.Limited | Households | 1965 |
| Graham Langley Limited | Manufacturing | 2009 |
| Graige Ltd | Wholesale & retail | 2026 |
| Grain House Management Limited | Real estate | 1986 |
| Gram Solutions Ltd | Information & communication | 2013 |
| Grama Consultancy Limited | Manufacturing | 2019 |
| Gramdon Services Limited | Real estate | 1992 |
| Grameen Exclusive Ltd | Hospitality | 2024 |
| Gramercy Construction Limited | Construction | 2016 |
| Granby Street Investments Ltd | Real estate | 2015 |
| Grand Bats Limited | Information & communication | 2023 |
| Grand Contractor Group Ltd | Construction | 2025 |
| Grand Emerald Properties Limited | Real estate | 2022 |
| Grand Final Productions Limited | Other services | 2026 |
| Grand Oaks Capital Limited | Financial services | 2008 |
| Grand Property Investments London Limited | Construction | 2023 |
| Grandiose Konajas Ltd | Information & communication | 2022 |
| Grandlink Ltd | Transport & logistics | 2018 |
| Grange 430 Limited | Real estate | 2017 |
| Grange Court (Leyton) Ltd | Real estate | 2024 |
| Grange Farm Land Limited | Agriculture & fishing | 2020 |
| Granite Mountain Limited | Real estate | 2023 |
| Gransden Avenue Holdings Limited | Real estate | 2019 |
| Gransden Avenue Limited | Construction | 2013 |
| Grant Harrod Lerman Davis LLP | | 2014 |
| Grant Harrod LLP | | 2006 |
| Grant Harrod Parkinson LLP | | 2004 |
| Grapedance Ltd | Wholesale & retail | 2025 |
| Graphene Development & Construction Limited | Construction | 2024 |
| Graphical Agency Limited | Administrative & support | 2007 |
| Grasa Limited | Wholesale & retail | 2025 |
| Graserob Limited | Transport & logistics | 2017 |
| Grasmere Finance Change Limited | Professional & scientific | 2015 |
| Grasp Software Ltd | Information & communication | 2013 |
| Gratevane Ltd | Hospitality | 2014 |
| Gratia (Abbey Care Home) Limited | Real estate | 2004 |
| Gratitude Matters Ltd | Wholesale & retail | 2026 |
| Gratitude Products Limited | Wholesale & retail | 2026 |
| Gravesend Oriental Foods Limited | Wholesale & retail | 2002 |
| Gravic Day Care Limited | Health & social care | 2026 |
| Gravicus Solutions Limited | Information & communication | 2026 |
| Gravicus Technologies Limited | Information & communication | 2016 |
| Gravitasq Ltd | Information & communication | 2018 |
| Grax International Limited | Extraterritorial | 1998 |
| Gray Group Holdings Limited | Financial services | 2022 |
| Gray Group Properties Limited | Real estate | 2022 |
| Grayfin Properties Ltd | Real estate | 2024 |
| GRB Electrics Limited | Construction | 2013 |
| Grdj Group Ltd | Real estate | 2024 |
| Great Bespoke Solutions Limited | Professional & scientific | 2024 |
| Great Hammer Construction Ltd | Construction | 2022 |
| Great Leap Company NO2 Limited | Real estate | 2019 |
| Great Minds Business Limited | Professional & scientific | 2020 |
| Great Path Ltd | Agriculture & fishing | 2020 |
| Great Quality Care Services Limited | Health & social care | 2022 |
| Greater London Vantage Holdings Ltd | Administrative & support | 2011 |
| Greatfind Recruitment Ltd | Administrative & support | 2016 |
| Greatorex Therapy Services Limited | Health & social care | 2015 |
| Greatplace Limited | Professional & scientific | 1984 |
| Greek Sky Ltd | Hospitality | 2026 |
| Green (Meredith Close) Maintenance Limited(The) | Households | 1980 |
| Green Associates Global Ltd | Agriculture & fishing | 2024 |
| Green B Ltd | Construction | 2025 |
| Green Box Holdings Limited | Financial services | 2019 |
| Green Cabin London Ltd | Hospitality | 2023 |
| Green Cactus Services Ltd | Transport & logistics | 2022 |
| Green City Projects Community Interest Company | Administrative & support | 2019 |