| Glass Assist UK Limited | Wholesale & retail | 2010 |
| Glass Digital Limited | Professional & scientific | 2014 |
| Glassfrog Consulting Ltd | Information & communication | 2024 |
| Glasshouse Rentals Ltd | Real estate | 2025 |
| Glenanne Limited | Construction | 2013 |
| Glencase Marketing Limited | Real estate | 1987 |
| Glendenning Ltd | Hospitality | 2024 |
| Global Enterprise (Holdings) Ltd | Extraterritorial | 2018 |
| Global Enterprise (NE) Limited | Construction | 2019 |
| Global Geopressure Advice Ltd | Professional & scientific | 2017 |
| Global Headhunting Group Ltd | Professional & scientific | 2019 |
| Global Link Investment Limited | Real estate | 2019 |
| Global Mobility Solutions Limited | Professional & scientific | 2022 |
| Global Office Services Ltd | Administrative & support | 2021 |
| Global One Services U.K. Limited | Real estate | 2019 |
| Global Partnering Solutions Ltd | Administrative & support | 2016 |
| Globalantist Ltd | Wholesale & retail | 2024 |
| Globevia Ltd | Wholesale & retail | 2025 |
| Glory Divine Property Investment Ltd | Real estate | 2022 |
| Gloryus Ltd | Hospitality | 2025 |
| Glow Creative Ltd | Professional & scientific | 2011 |
| Gloyne Properties Limited | Real estate | 2012 |
| Glyncastle Group Ltd | Financial services | 2022 |
| Glynns Construction Ltd | Construction | 2025 |
| GM Plastering & Drylining Services Ltd | Construction | 2016 |
| GM Transportation Limited | Transport & logistics | 2024 |
| GMC Rentals Limited | Administrative & support | 2017 |
| Gmcp Investments Limited | Construction | 2019 |
| GN Warehouse Ltd | Wholesale & retail | 2019 |
| Gnoc Developments Ltd | Construction | 2022 |
| Gnoc Estates Holdings Ltd | Financial services | 2025 |
| Gnoc Estates Ltd | Real estate | 2020 |
| Gnoc Holdings Ltd | Financial services | 2021 |
| Gnoc Ltd | Transport & logistics | 2013 |
| Gnoc Properties Ltd | Real estate | 2020 |
| Go Enviro Facilities Limited | Administrative & support | 2024 |
| Go GAS and Power Ltd | Energy | 2017 |
| Go North Construction Ltd | Construction | 2026 |
| Go Technology Consultancy Limited | Information & communication | 2025 |
| Go the Distance (GTD) CIC | Administrative & support | 2019 |
| Go Zekko Ltd | Information & communication | 2025 |
| Gold Wind Limited | Information & communication | 2013 |
| Goldcrest Developments North East Ltd | Wholesale & retail | 2006 |
| Goldcrest Residential Ltd | Real estate | 2024 |
| Goldcrust Media Limited | Information & communication | 2026 |
| Golf GUY Reviews Limited | Information & communication | 2023 |
| Golftee GP1 Limited | Real estate | 2017 |
| Golftee LP 4 Limited | Professional & scientific | 2003 |
| Golftee NOM C Limited | Professional & scientific | 2017 |
| Golftee NOM D Limited | Professional & scientific | 2017 |
| Gonzales Group Ltd | Households | 2024 |
| Good Nature Retail Ltd | Wholesale & retail | 2024 |
| Goodall Groundworks (NE) Limited | Construction | 2021 |
| Goodfood Labs Ltd | Wholesale & retail | 2026 |
| Goptara Ltd | Financial services | 2023 |
| Gordons Plant Hire Ltd. | Administrative & support | 2011 |
| Gordon’S Groundwork’S Ltd | Construction | 2018 |
| Gorilla Driveways Ltd | Construction | 2026 |
| GP Autocare Limited | Wholesale & retail | 2018 |
| GP Developments (NE) Limited | Construction | 2013 |
| GPD Installation Services Limited | Administrative & support | 2007 |
| GPS Leaflet Group Ltd | Professional & scientific | 2019 |
| Grace Church Newton Hall | Other services | 2019 |
| Gracey Limited | Real estate | 2019 |
| GRACIE123 Ltd | Construction | 2021 |
| Graform Limited | Administrative & support | 2004 |
| Graham + Limited | Professional & scientific | 2000 |
| Graham Holdings Limited | Professional & scientific | 2023 |
| Graham Palmer Consulting & Advisory Services Ltd | Professional & scientific | 2025 |
| Graham Recruitment Ltd | Extraterritorial | 2023 |
| Graham Roofing Contractors Ltd | Construction | 2025 |
| Grandora Global Ltd | Wholesale & retail | 2025 |
| Grandpa's Fish Bar Ltd | Hospitality | 2024 |
| Grandpa's Fish Bar Mobile Limited | Hospitality | 2026 |
| Grandpa’S House Ltd | Financial services | 2026 |
| Grange Iron Company Ltd | Manufacturing | 2023 |
| Grape Software Limited | Information & communication | 2020 |
| Graviton IT Limited | Other services | 2012 |
| Gray & SON Robe Makers (Durham) Ltd | Wholesale & retail | 1988 |
| Gray's Northumberland Ltd | Wholesale & retail | 2007 |
| Graze Food Services Limited | Hospitality | 2022 |
| Grdabor Ltd | Hospitality | 2026 |
| Great Claims Ltd | Administrative & support | 2022 |
| Great Lumley Estates Ltd | Real estate | 2016 |
| Great North Logistics Ltd | Professional & scientific | 2021 |
| Green Energy Collective Limited | Professional & scientific | 2025 |
| Green Eyed Cat Ltd | Professional & scientific | 2022 |
| Green Genie Installations Ltd | Professional & scientific | 2024 |
| Green Spark Energy Ltd | Construction | 2023 |
| Green Villa 808 Limited | Hospitality | 2025 |
| Green Whisper Ltd | Wholesale & retail | 2025 |
| Greenforge Environmental Services Ltd | Water & waste | 2025 |
| Greenstock Pensions Ltd | Real estate | 2016 |
| Green’S Groundwork's Ltd | Construction | 2025 |
| Gregson Laidler Property Consultants Ltd | Professional & scientific | 2020 |
| Grey's Interiors Ltd | Wholesale & retail | 2016 |
| Greyfriars International Ltd | Extraterritorial | 1999 |
| Greystone Surveyors Ltd | Professional & scientific | 2021 |
| GRG Groundworks Ltd | Construction | 2022 |
| Grills & Drinks UK LP | | 2015 |