| Gresham Property Limited | Real estate | 2012 |
| Gresham Shoot Club Limited | Agriculture & fishing | 2010 |
| Gresley Engineering Limited | Financial services | 2018 |
| Gresser Limited | Professional & scientific | 2021 |
| Grey Consulting Limited | Financial services | 2026 |
| Grey Elephant Properties Ltd | Real estate | 2024 |
| Grey Matter Hospitality Ltd | Administrative & support | 2015 |
| Greycott Group Ltd | Financial services | 2023 |
| Greyfriars Cost Management Limited | Professional & scientific | 2024 |
| Greyfriars Project Management Limited | Professional & scientific | 2018 |
| Greyskies Ltd | Professional & scientific | 2014 |
| GRF Birmingham Ltd | Wholesale & retail | 2017 |
| Grids London Limited | Wholesale & retail | 2011 |
| Griffin Cars Ltd | Wholesale & retail | 2018 |
| Griffin Estates Limited | Real estate | 1997 |
| Griffin Farms Limited | Agriculture & fishing | 1961 |
| Griffin Sporting Limited | Administrative & support | 2026 |
| Griffiths Investment Limited | Financial services | 2024 |
| Griib Design Limited | Arts & recreation | 2005 |
| Grill and Pizza Ltd | Hospitality | 2019 |
| Grill Town (Sherwood) Ltd | Hospitality | 2017 |
| Griller Gillingham Ltd. | Hospitality | 2018 |
| Grillz Khana Limited | Hospitality | 2019 |
| Grillz Steak Limited | Hospitality | 2023 |
| Grillz Steaks & Desserts Limited | Hospitality | 2020 |
| Grillzilla Grill Limited | Hospitality | 2017 |
| Grimble & SKO LLP | | 2022 |
| Grimley Securities Limited | Construction | 1961 |
| Grimwood & Porter’S Ltd | Wholesale & retail | 2025 |
| Grindeks Kalceks UK Limited | Manufacturing | 2022 |
| Grindstone Capital Limited | Professional & scientific | 2020 |
| Grintech Limited | Financial services | 2013 |
| Gripease Ltd | Wholesale & retail | 2025 |
| Gripton Consultancy Ltd | Professional & scientific | 2019 |
| Gripzfusion Ltd | Wholesale & retail | 2023 |
| Griston Land Company Limited | Extraterritorial | 2013 |
| Griston Park Limited | Real estate | 2004 |
| Grit & Grind Ltd | Other services | 2025 |
| Grit Digital Ltd | Information & communication | 2010 |
| Grit Hosting Limited | Information & communication | 2015 |
| Grix Mortgages Ltd | Financial services | 2018 |
| Grix Properties Ltd | Real estate | 2026 |
| Grns Worldwide Ltd | Manufacturing | 2026 |
| Groarke Electrical Services Ltd | Manufacturing | 2022 |
| Groarke Management Consultancy Ltd | Professional & scientific | 2024 |
| Groom Complete Construction Ltd | Construction | 2023 |
| Groom Property Co Ltd | Real estate | 2026 |
| Groombridge Holdings Ltd | Extraterritorial | 2021 |
| Groomed Barber Club Ltd. | Other services | 2015 |
| Grooms (Norwich) Limited | Wholesale & retail | 2010 |
| Groove & HUE Ltd | Other services | 2023 |
| Groreach Ltd | Information & communication | 2025 |
| Grosvenor Capital London Limited | Real estate | 2014 |
| Grosvenor Fish Bar Limited | Hospitality | 2012 |
| Grosvenor Franchising Ltd | Administrative & support | 2024 |
| Grosvenor Road Ltd | Households | 2021 |
| Grosvenor Security Ltd | Administrative & support | 2019 |
| Groszek Polish Shops Ltd | Wholesale & retail | 2014 |
| Groucott Holdings Limited | Financial services | 2024 |
| Ground Technology Services Limited | Construction | 2011 |
| Groundcore Contractors Ltd | Administrative & support | 2023 |
| Groundcore Fencing Ltd | Administrative & support | 2023 |
| Grounded Coffee Bar Ltd | Hospitality | 2023 |
| Grounded Consulting Ltd | Administrative & support | 2026 |
| Groundhog Property Services Ltd | Construction | 2014 |
| Grounds and Garden Limited | Wholesale & retail | 2024 |
| Grounds to Unite CIC | Hospitality | 2025 |
| Groundworks U.K (East Anglia) Ltd | Construction | 2010 |
| Group FMI Limited | Wholesale & retail | 1997 |
| Group HR Solutions Ltd | Administrative & support | 2019 |
| Group Lotus Limited | Professional & scientific | 1958 |
| Group Rapallo Ltd | Hospitality | 2022 |
| Group Social Ltd | Professional & scientific | 2019 |
| GROUP4 Logistics Limited | Transport & logistics | 2017 |
| Groupe Idec UK Limited | Construction | 2018 |
| Groupeast Limited | Real estate | 2008 |
| Groupies Auction Limited | Wholesale & retail | 2025 |
| Grouse Limited | Professional & scientific | 2012 |
| Grove Corner (Banham) Management Company Limited | Households | 2022 |
| Grove Cottages (Chelsea) Ltd | Administrative & support | 2010 |
| Grove EAR Clinic Ltd | Health & social care | 2022 |
| Grove Estate Holdings Ltd | Financial services | 2017 |
| Grove Farm Pigs Ltd | Agriculture & fishing | 2012 |
| Grove Holdings Norfolk Ltd | Real estate | 2024 |
| Grove Walk Management Company Ltd | Households | 2025 |
| Grovesend Productions Ltd | Information & communication | 2025 |
| Grovewood Properties Limited | Real estate | 2012 |
| Grow Barbershop Ltd | Wholesale & retail | 2023 |
| Grow Digital Services Ltd | Professional & scientific | 2018 |
| Grow Greener (GG) Ltd | Wholesale & retail | 2023 |
| Growth Partners Management Limited | Information & communication | 2016 |
| Grrtrading Ltd | Wholesale & retail | 2023 |
| GRS Mechanical Limited | Construction | 2008 |
| GRT Survey Limited | Professional & scientific | 2019 |
| GRUBHUB26 Ltd | Hospitality | 2026 |
| Grump Dog Games Ltd | Information & communication | 2021 |
| Grunt Software Ltd | Information & communication | 2022 |
| GRW Norfolk Management Consultants Limited | Professional & scientific | 2021 |
| GS Bars Limited | Hospitality | 2022 |
| GS Cube Limited | Administrative & support | 2016 |