| Fwfm Ltd | Construction | 2025 |
| G & a Joinery Specialists Limited | Construction | 2017 |
| G & P Property Investments Ltd | Real estate | 2019 |
| G B W Developments Limited | Administrative & support | 2016 |
| G C Joinery Services Limited | Construction | 2002 |
| G Calvert Masonry and Joinery Ltd | Construction | 2024 |
| G D Contracts (North East) Limited | Construction | 2011 |
| G Fairhurst Contracting Services Limited | Professional & scientific | 2012 |
| G H Farms Limited | Agriculture & fishing | 2010 |
| G J Jackson Accountants Limited | Professional & scientific | 2002 |
| G Jacobs Builders Limited | Construction | 2017 |
| G K M Technical Services Limited | Information & communication | 2002 |
| G Matthews Property Solutions Limited | Construction | 2021 |
| G R Martin Limited | Construction | 2008 |
| G T S NE Ltd | Transport & logistics | 2024 |
| G&D Watchman Limited | Wholesale & retail | 2018 |
| G. Gardiner & SON Ltd | Professional & scientific | 2011 |
| G.E.H Developments Ltd | Administrative & support | 2011 |
| G.W.Rudd Limited | Real estate | 1908 |
| GA Properties North East Ltd | Real estate | 2025 |
| GAF Consulting Ltd | Administrative & support | 2011 |
| Gainvest Ltd | Extraterritorial | 2020 |
| Gallone Holdings Limited | Financial services | 2022 |
| Game's on Ltd | Arts & recreation | 2025 |
| Gamechanging Outcomes Ltd | Professional & scientific | 2020 |
| Gareth Richardson Ltd | Construction | 2008 |
| Gary Thompson Steelwork Limited | Construction | 2025 |
| Gary Wilkinson Limited | Extraterritorial | 2016 |
| Gavin Lund Contracts Limited | Construction | 2015 |
| GB Bodybuilders Horseboxes Ltd | Manufacturing | 2024 |
| GB Commercial Finance Limited | Financial services | 2026 |
| GB Tyre Repairs Ltd | Manufacturing | 2021 |
| GCB Trading Ltd | Wholesale & retail | 2024 |
| GD Heating & Plumbing Limited | Construction | 2006 |
| Gemini Acquisitions Ltd | Real estate | 2023 |
| Gemini Bathrooms Ltd. | Wholesale & retail | 2022 |
| Gemini Developments Ltd | Construction | 2022 |
| Gemini Properties NE Ltd | Real estate | 2023 |
| Generation Demand Limited | Professional & scientific | 2022 |
| Genesis Tax LLP | | 2021 |
| Gentle Nails-Bishop Auckland Limited | Other services | 2024 |
| Geomar Ltd | Transport & logistics | 2025 |
| GG-023-258 Limited | Real estate | 2022 |
| GH Investco Limited | Financial services | 2025 |
| Ghent Building Contractors Limited | Construction | 2010 |
| GHS Crane Hire Limited | Administrative & support | 2003 |
| Gibson Building Contractors Limited | Construction | 2003 |
| Giles Rice Property Management Ltd. | Real estate | 2017 |
| Gillian Arnold Manufacturing Limited | Extraterritorial | 2022 |
| Gillian Arnold North Limited | Extraterritorial | 2022 |
| Gillian Arnold Online Limited | Extraterritorial | 2022 |
| Gillian Arnold Training Limited | Extraterritorial | 2022 |
| Gladstone Development NE Limited | Construction | 2020 |
| Glasper LEE Design Limited | Professional & scientific | 2018 |
| Gleam Team North East Ltd | Administrative & support | 2025 |
| Gledstone Estates Limited | Real estate | 2006 |
| Glenn Stockley Solutions Limited | Manufacturing | 2013 |
| Global Internet Consultant Ltd | Information & communication | 2019 |
| Global Iron and Steel Limited | Wholesale & retail | 2011 |
| Globalocity Travel Limited | Administrative & support | 2019 |
| GMC Taxis North East Ltd | Transport & logistics | 2009 |
| Goldy Fish Bar Ltd | Hospitality | 2026 |
| Gora Deol Ltd | Hospitality | 2023 |
| Gordon Elliott Solutions Ltd | Construction | 2026 |
| GP Management Consultants Limited | Professional & scientific | 2018 |
| GP Trips Ltd | Construction | 2026 |
| Graeme Norman Limited | Real estate | 2022 |
| Graham Electrical Solutions Ltd | Construction | 2020 |
| Graham Logistics Limited | Wholesale & retail | 2008 |
| Graham Marsh Creative Ltd | Professional & scientific | 2025 |
| Graham Transport Limited | Extraterritorial | 2012 |
| Graham Ventures Limited | Real estate | 2019 |
| Graham's Motor Services Limited | Transport & logistics | 2010 |
| Grants Gym Supplement Shop Limited | Wholesale & retail | 2011 |
| Grantwise Limited | Professional & scientific | 2024 |
| Graphitepanda Ltd | Professional & scientific | 2018 |
| Grass Direct Limited | Wholesale & retail | 2013 |
| Gratex Company Limited | Wholesale & retail | 2024 |
| Gray's Consultancy Services LLP | | 2007 |
| Graytness Ltd | Arts & recreation | 2026 |
| Great Broughton (Management Company) Limited | Real estate | 2018 |
| Green Horizon Renewables NE Ltd | Construction | 2025 |
| Greener Miles Running Limited | Arts & recreation | 2019 |
| Greener Roads Ltd. | Professional & scientific | 2014 |
| Greenvale Farms Limited | Manufacturing | 1997 |
| Gregorys Bakers & Deli Limited | Hospitality | 2021 |
| Grove Reed Joinery Limited | Manufacturing | 2008 |
| Growing Together Durham Ltd | Health & social care | 2015 |
| GRP North East Limited | Construction | 2021 |
| GS & MD Ltd | Real estate | 2025 |
| GSS Associates Limited | Hospitality | 2013 |
| GTR Enterprises Limited | Professional & scientific | 2017 |
| Guardian Alliance Health Care Services Ltd | Administrative & support | 2021 |
| Guardian Alliance Training and Development Ltd | Health & social care | 2024 |
| GW Car Repairs Limited | Wholesale & retail | 2024 |
| H&B Screeders Limited | Construction | 2013 |
| H.D.V. Food Limited | Real estate | 2001 |
| H.E. Waite Limited | Wholesale & retail | 2024 |
| H.S. Carlsteel Engineering Limited | Construction | 2005 |
| H2O Clean Drain Care Ltd | Administrative & support | 2018 |