| Grey Street Leisure Ltd | Hospitality | 2022 |
| Grey Street Services Ltd | Administrative & support | 2021 |
| Grey Street Wealth Ltd | Financial services | 2019 |
| Greyridge Software Limited | Information & communication | 2004 |
| Greystoke (Ponteland) Management Company Limited | Households | 2021 |
| Greystoke Management Company Limited | Extraterritorial | 2004 |
| Greystoke Morpeth Management Company Limited | Households | 2017 |
| Greystoke Park Maintenance (NO. 1) Limited | Real estate | 1992 |
| Greystoke Park Maintenance (NO. 2) Limited | Households | 1994 |
| Greystone Group Limited | Administrative & support | 2023 |
| Grice Consulting Services Ltd | Professional & scientific | 2022 |
| Grid Finder Limited | Arts & recreation | 2021 |
| Grid Smarter Cities Ltd | Information & communication | 2009 |
| Gridselect Ltd | Information & communication | 2025 |
| Grieves Bolting Ltd | Construction | 2026 |
| Griffiths Consulting Partnership Ltd | Professional & scientific | 2026 |
| Griffiths Procter Land & Investment Limited | Professional & scientific | 2011 |
| Grimes Accountancy Services Ltd | Professional & scientific | 2006 |
| Grind Coffee & Apparel Limited | Wholesale & retail | 2017 |
| Grindon Broadway Management Company Limited | Households | 2003 |
| Grip Reit PLC | Real estate | 2016 |
| Grip UK Holdings Limited | Financial services | 2016 |
| Grip UK Property Developments Limited | Real estate | 2017 |
| Grip UK Property Investments Limited | Real estate | 2017 |
| Gritstone Project Management Limited | Professional & scientific | 2014 |
| GRO Kids Ltd | Wholesale & retail | 2026 |
| Gro-Group Holdings Limited | Wholesale & retail | 2012 |
| Gro-Group International Limited | Wholesale & retail | 2004 |
| Gro-Group Limited | Wholesale & retail | 2003 |
| Groat Market Leisure Ltd | Administrative & support | 2022 |
| Groat Market Offices Limited | Professional & scientific | 2022 |
| Grocery Hub Ltd | Wholesale & retail | 2021 |
| Groove Theory Ltd | Information & communication | 2026 |
| Groovement Events Ltd | Professional & scientific | 2023 |
| Groovy Disco Tech Limited | Professional & scientific | 2023 |
| Grosvenor Gate Property Management Limited | Real estate | 2005 |
| Grosvenor Lodge South Shields Management Company Limited | Professional & scientific | 2014 |
| Grosvenor Place Property Management Limited | Real estate | 2000 |
| Ground Control MMA Ltd | Arts & recreation | 2019 |
| Ground SIX Limited | Information & communication | 2011 |
| Groundbright Property Management Limited | Households | 1989 |
| Groundsight Ltd | Information & communication | 2025 |
| Groundwork Sports Massage Ltd | Other services | 2025 |
| Group 961 Ltd | Wholesale & retail | 2023 |
| Group Zero Transporters Ltd | Transport & logistics | 2019 |
| Grove Crescent Limited | Real estate | 2016 |
| Grove Europe Pension Trustees Limited | Professional & scientific | 1985 |
| Grove Garage Heaton Limited | Wholesale & retail | 2022 |
| Groverr Stores Ltd | Wholesale & retail | 2025 |
| Grow + Play Ltd | Education | 2024 |
| Growth Circles (UN) Limited | Professional & scientific | 2019 |
| Growth Marketing Gateway Limited | Professional & scientific | 2025 |
| Growth Nation Academy Limited | Education | 2022 |
| Grrowlingly Purrfect Limited | Other services | 2015 |
| Grtr Software Consultancy Ltd | Information & communication | 2025 |
| GS Consulting Limited | Professional & scientific | 2018 |
| GS Narang Ltd | Hospitality | 2016 |
| GSD Creatives CIC | Arts & recreation | 2025 |
| GSD FIX Limited | Construction | 2022 |
| GSD Technology Ltd | Real estate | 2023 |
| GSD TRAD2 Ltd | Wholesale & retail | 2021 |
| GSG (Newcastle) Ltd | Hospitality | 2011 |
| Gsgs Heating & Plumbing Ltd | Other services | 2018 |
| GSL Law Ltd | Professional & scientific | 2024 |
| GT Developments (NE) Limited | Construction | 2016 |
| Gt&L Limited | Professional & scientific | 2018 |
| GT3 Architects Limited | Professional & scientific | 2008 |
| GTB (Gosforth) Limited | Construction | 2022 |
| GTB Software Solutions Limited | Information & communication | 2024 |
| Gtechnic Integrity Management Ltd | Professional & scientific | 2019 |
| GTP Innovations Limited | Administrative & support | 2009 |
| GTR Drivers Club Limited | Other services | 2017 |
| GTR Shippers Ltd | Wholesale & retail | 2026 |
| GTS Rail Operations Limited | Transport & logistics | 2023 |
| GU Licensing Limited | Information & communication | 2007 |
| GU Publishing Limited | Arts & recreation | 2009 |
| Gubeon Limited | Agriculture & fishing | 2023 |
| Gudpac International Ltd | Manufacturing | 2026 |
| Guerilla Advertising Limited | Extraterritorial | 2006 |
| Guerilla Communications Limited | Other services | 1999 |
| Guerilla Interactive Limited | Extraterritorial | 2006 |
| Guerilla Media Ltd | Professional & scientific | 2003 |
| Guerilla PR Ltd | Professional & scientific | 2003 |
| Guerilla Productions Limited | Extraterritorial | 2006 |
| Guerilla Ware Limited | Extraterritorial | 2004 |
| Guerilla Wear Limited | Extraterritorial | 2004 |
| Guerrilla Fabrications Ltd | Construction | 2018 |
| Guess What Games Limited | Information & communication | 2017 |
| Guilden Place (Warkworth) Management Company Limited | Households | 2017 |
| Guine Bridge Ltd | Transport & logistics | 2019 |
| Guitar Anatomy Limited | Wholesale & retail | 2017 |
| Gujjar Car Sales Ltd | Wholesale & retail | 2026 |
| GUL and DIN Ltd | Wholesale & retail | 2023 |
| Gulf Harbour Trade Ltd | Wholesale & retail | 2025 |
| Gulmen Group Ltd | Real estate | 2023 |
| Gumulka Ltd | Transport & logistics | 2024 |
| Gunn-Reed Family Investments Ltd | Financial services | 2024 |
| Gunnell & Chambers Accountants Limited | Professional & scientific | 2021 |
| GUO Limited | Real estate | 2002 |
| Guptaeyepractice Ltd | Health & social care | 2019 |