| Greenteck Global Northern Ltd | Manufacturing | 2023 |
| Greer Alexander Ltd | Professional & scientific | 2013 |
| Greer Exporting Company Ltd | Wholesale & retail | 2014 |
| Greg Agro Ltd | Wholesale & retail | 2019 |
| Greg General Building Services Ltd | Construction | 2014 |
| Greybird North Limited | Real estate | 2022 |
| Greyhound Grips Ltd | Information & communication | 2018 |
| Greythorpe Commercial Limited | Real estate | 2018 |
| Grievesons Valuers & Auctioneers Limited | Other services | 2025 |
| Griffin & Co Holdings Ltd | Financial services | 2025 |
| Griffin Leisure Limited | Construction | 2025 |
| Groom of Jesmond Limited | Professional & scientific | 2017 |
| Groovygreets Ltd | Wholesale & retail | 2025 |
| GROUNDSCREWS4U Ltd | Construction | 2020 |
| Group Horizon Limited | Administrative & support | 2008 |
| Group SMB Limited | Professional & scientific | 1985 |
| Group Universal Technical Services Limited | Construction | 2022 |
| Grovewell Commercial Ltd | Construction | 2023 |
| Growloom Marketing Ltd | Professional & scientific | 2025 |
| GRS Consultants NE Ltd | Health & social care | 2017 |
| GRS Medical Limited | Health & social care | 2015 |
| Grub at the Hub Limited | Hospitality | 2024 |
| GS & JK Properties Ltd | Real estate | 2024 |
| GS MAX Properties Limited | Real estate | 2024 |
| GS Sandhu Joinery Ltd | Construction | 2026 |
| GS Specialist Cars Limited | Wholesale & retail | 2023 |
| GSA Properties Limited | Real estate | 2002 |
| GSB Offshore Ltd | Professional & scientific | 2023 |
| GSD TRAD3 Ltd | Wholesale & retail | 2021 |
| GSF Renewables Ltd | Manufacturing | 2023 |
| GSP North East Ltd | Transport & logistics | 2021 |
| GT Energy Solutions Ltd | Construction | 2021 |
| GTS Couriers Ltd | Transport & logistics | 2025 |
| GUF Training Ltd | Education | 2020 |
| Guiding Light NE CIC | Administrative & support | 2021 |
| Gulfedge Machinery Ltd | Wholesale & retail | 2022 |
| Gurreilla Security Services Ltd | Administrative & support | 2022 |
| Guzik-Jagus Ltd | Health & social care | 2018 |
| GVT Tech Ltd | Information & communication | 2026 |
| GW Architectural Design Ltd | Administrative & support | 2015 |
| Gwengale Accountancy Ltd | Professional & scientific | 2026 |
| GWH North East Ltd | Manufacturing | 2023 |
| Gymbee Enterprises Ltd | Other services | 2025 |
| H & C Facilities Management Ltd | Other services | 2025 |
| H & J Pipe Fitting Services Limited | Professional & scientific | 2013 |
| H & R Racing Limited | Arts & recreation | 2024 |
| H and a Convenience Store Ltd. | Wholesale & retail | 2016 |
| H J C Specialist Coatings Limited | Extraterritorial | 2022 |
| H&I Investment Group Ltd | Financial services | 2026 |
| H&M Newcastle Construction Limited | Construction | 2022 |
| H&T Project Services Ltd | Construction | 2021 |
| H&Z Car Valeting Ltd | Wholesale & retail | 2024 |
| H.A Locums NE Ltd | Wholesale & retail | 2021 |
| H.C. Retail Ltd. | Wholesale & retail | 2004 |
| H.G.Timber Limited | Manufacturing | 1945 |
| H.K.C. (North East) Limited | Construction | 2006 |
| H.N.Storey Limited | Construction | 1959 |
| H.R. for the Small Business Limited | Administrative & support | 2009 |
| H2O Estates Limited | Construction | 2005 |
| H4 Medical Limited | Wholesale & retail | 2010 |
| HAB Property Group Ltd | Construction | 2024 |
| Habibi Eats Market Ltd | Wholesale & retail | 2026 |
| Habibi Let's Go NE Ltd | Hospitality | 2025 |
| Habibi Serving Events Ltd | Wholesale & retail | 2026 |
| Habibi Shawarma Street Eats Ltd | Hospitality | 2024 |
| Habilis Biotech Innovations Limited | Professional & scientific | 2005 |
| Habuvibez Inc Ltd | Wholesale & retail | 2026 |
| Hadrian Cleaning Company Limited | Administrative & support | 2017 |
| Hadrian Coachworks Limited | Wholesale & retail | 1982 |
| Hadrian Healthcare (Developments) Limited | Construction | 2018 |
| Hadrian Healthcare (Gosforth) Limited | Health & social care | 2009 |
| Hadrian Healthcare (Penrith) Limited | Health & social care | 2024 |
| Hadrian Healthcare (Whickham) Limited | Health & social care | 2009 |
| Hadrian Healthcare Limited | Financial services | 2016 |
| Hadrian Packaging NE Ltd | Manufacturing | 2024 |
| Hadrian's Wall Brewery Ltd | Manufacturing | 2021 |
| Hadston Parade Ltd | Extraterritorial | 2015 |
| Hadston Precinct Ltd | Extraterritorial | 2015 |
| Haech Properties Ltd | Real estate | 2023 |
| Haem-Dezh Limited | Health & social care | 2022 |
| Hafizmall Limited | Wholesale & retail | 2025 |
| Haighs Law Firm Limited | Professional & scientific | 2016 |
| Haihat Limited | Health & social care | 2022 |
| Hailsy Ltd | Construction | 2025 |
| Hair and Skin Expert Ltd | Real estate | 2017 |
| Hair by Claire H Limited | Other services | 2026 |
| Hair by Firenze Ltd | Other services | 2026 |
| Hair HAS NO Gender Ltd | Other services | 2024 |
| Hairabella Luxe Ltd | Other services | 2021 |
| Hairflair Beauty Salon Limited | Other services | 2002 |
| Hairtrade.Com Limited | Wholesale & retail | 2017 |
| Hakibo Holding Ltd | Financial services | 2023 |
| Haldorsen Properties Limited | Real estate | 1979 |
| Haleveim Limited | Real estate | 2017 |
| Half Moon Inn Ltd | Hospitality | 2024 |
| Hall Accountancy Limited | Professional & scientific | 2009 |
| Hall Consultants Limited | Real estate | 2011 |
| Hallasgo and Sons Limited | Health & social care | 2021 |
| Halls of Durham Northern Limited | Wholesale & retail | 2009 |
| Hally Designs Limited | Wholesale & retail | 2019 |