| G S Doyle Limited | Water & waste | 2014 |
| G&P Services Limited | Construction | 2018 |
| G.I.V. UK Ltd | Wholesale & retail | 1997 |
| Gabriel 2014 Ltd | Construction | 2018 |
| Gabriel C Construction Ltd | Construction | 2021 |
| Gajinder RAM Limited | Wholesale & retail | 2025 |
| Galaxy Dynamics Ltd | Information & communication | 2022 |
| Gambit Property Solutions Ltd | Real estate | 2021 |
| Gapex Limited | Professional & scientific | 2014 |
| Gapex U.K. Limited | Manufacturing | 2017 |
| Garden Spirit Ltd | Administrative & support | 2017 |
| Gardner Residential Ltd | Real estate | 2018 |
| Gargamel Ltd | Real estate | 2025 |
| Garrick Wheelers Ltd | Real estate | 2025 |
| Gartner U.K. Limited | Information & communication | 1988 |
| Gassmac Ltd | Professional & scientific | 2022 |
| GB Tech Support Ltd | Administrative & support | 2011 |
| GB Truck and Van Limited | Wholesale & retail | 2019 |
| GBK Homes Ltd | Real estate | 2018 |
| GBM Minerals Engineering Consultants Limited | Professional & scientific | 1994 |
| GBS Lucas & J Limited | Construction | 2025 |
| GD Builders & Contractors Ltd | Construction | 2023 |
| GD2 Limited | Real estate | 2020 |
| GDC Beauty Group UK Limited | Other services | 1991 |
| Gell Properties Ltd | Real estate | 2024 |
| Gene Vincent Foundation CIC | Information & communication | 2025 |
| General Engine Management Systems Limited | Manufacturing | 1985 |
| Generation: YOU Employed, UK | Administrative & support | 2017 |
| Genevra Care Limited | Health & social care | 2022 |
| Geoalt Limited | Health & social care | 2018 |
| Geoalth Limited | Real estate | 2022 |
| Geoiconic Limited | Professional & scientific | 2021 |
| German Property & Investment Group Limited | Administrative & support | 2016 |
| Gerosa OIL Services Company Ltd | Mining & quarrying | 2018 |
| Gesundheitsmagazin Deutschland Ltd | Information & communication | 2023 |
| Gesundheitstests Ltd | Professional & scientific | 2023 |
| Getty Capital Limited | Administrative & support | 2005 |
| GG-608-356 Limited | Real estate | 2024 |
| GG-918-110 Limited | Real estate | 2024 |
| Ghadco Ltd | Real estate | 2024 |
| Ghani Sons Culinary Services Company Ltd | Hospitality | 2024 |
| Gianix Ltd | Other services | 2013 |
| Gidam Properties Ltd | Real estate | 2026 |
| Gillian Jacquest Limited | Professional & scientific | 2014 |
| Gilmour Associates Ltd | Extraterritorial | 2023 |
| Gilmour Bennett Associates Ltd | Professional & scientific | 2024 |
| Gilmour Management Ltd | Information & communication | 2023 |
| Gjallarhorn Ltd | Financial services | 2021 |
| Gjeta Hightech Electric Ltd | Construction | 2022 |
| GJP (Carlisle) Limited | Real estate | 2009 |
| Glass Medic Limited | Extraterritorial | 1988 |
| Glencar Propco Ltd | Real estate | 2025 |
| Glenfield Properties Limited | Other services | 1991 |
| Glenross Construction Ltd | Construction | 2023 |
| Glenross Plant Hire Ltd | Administrative & support | 2025 |
| Glitter Boutique Ltd | Wholesale & retail | 2019 |
| Global AI Horizon Ltd | Information & communication | 2025 |
| Global Brands and Marketing Ltd | Professional & scientific | 2025 |
| Global Collect Limited | Information & communication | 2021 |
| Global Health Group Ltd | Professional & scientific | 2025 |
| Global Lead Generation Ltd | Information & communication | 2020 |
| Global Motion Limited | Transport & logistics | 2003 |
| Global Motion Pictures Limited | Transport & logistics | 2019 |
| Global Motion Productions Ltd | Transport & logistics | 2013 |
| Global Options HDN Limited | Transport & logistics | 2020 |
| Global Promotional Services Ltd | Professional & scientific | 2022 |
| Global Real Estate Enterprises Ltd | Real estate | 2020 |
| Global Synergestic Solutions Ltd | Financial services | 2021 |
| Global Vision Seven Ltd | Other services | 2024 |
| Glzt Ltd | Real estate | 2021 |
| Go Smart Property Ltd | Administrative & support | 2017 |
| Godley Property Portfolio Ltd | Real estate | 2019 |
| Gold & Mithril Ltd | Other services | 2023 |
| Golden Brooke Limited | Wholesale & retail | 2026 |
| Golden Hands Massage Ltd | Health & social care | 2025 |
| Golden ZEN Limited | Wholesale & retail | 2024 |
| Goldfinch Enterprises Ltd | Real estate | 2025 |
| Goldhawk Group Ltd | Wholesale & retail | 2025 |
| Golding Holdings Ltd | Information & communication | 2018 |
| Goldstone Real Estate Ltd | Real estate | 2024 |
| Goliath Capital LLP | | 2020 |
| Goodnight Charters Ltd | Transport & logistics | 2021 |
| Goodstay Properties Ltd | Hospitality | 2023 |
| Gordon Daniels Contracting Ltd | Construction | 2026 |
| Gorsedd Development Ltd | Construction | 2020 |
| Gostrey Limited | Real estate | 2015 |
| Gould Equity Ltd | Financial services | 2025 |
| Gozero Limited | Transport & logistics | 2017 |
| Grain & Groove Ltd | Manufacturing | 2025 |
| Grakm Limited | Real estate | 2024 |
| Grand Bricks Limited | Real estate | 2021 |
| Grand Flori Ltd | Wholesale & retail | 2020 |
| Granthorp Properties Ltd | Real estate | 2024 |
| Great Capital Investments Ltd | Real estate | 2017 |
| Great Capital Partners Ltd | Real estate | 2018 |
| Great Liberty Invest Ltd | Real estate | 2021 |
| Great Liberty Real Estate Ltd | Real estate | 2021 |
| Green 1ST Ltd | Real estate | 2013 |
| Green Food Products Ltd | Wholesale & retail | 2024 |
| Green Home Living Ltd | Real estate | 2024 |