| GBS Electrics Limited | Construction | 2014 |
| GBW2024 Limited | Arts & recreation | 2024 |
| GC Events Ltd | Hospitality | 2025 |
| GC Local Ltd | Information & communication | 2020 |
| GC Turbine Repairs Ltd | Manufacturing | 2020 |
| GCC (NE) Ltd | Arts & recreation | 2025 |
| GCO Solar Ltd | Wholesale & retail | 2025 |
| GCS Training and Medical Group Ltd | Education | 2020 |
| GD Developments PMC Limited | Professional & scientific | 2017 |
| GDC Packaging Group Ltd | Administrative & support | 2019 |
| GDL Electronics Ltd | Information & communication | 2015 |
| Gearbox Repair Specialists Limited | Wholesale & retail | 2002 |
| Geary Powersystems Ltd | Administrative & support | 2011 |
| Gecko Gaming Ltd | Wholesale & retail | 2023 |
| Gecko Heating Limited | Construction | 2016 |
| Gecko Mechanical Limited | Construction | 2026 |
| Gecko North East Limited | Construction | 2026 |
| Gedanken Ltd | Professional & scientific | 2006 |
| Gee-Kent HO Ltd | Other services | 2014 |
| Gefc Limited | Other services | 2011 |
| GEM and Eves Cleans Limited | Administrative & support | 2025 |
| GEM Scaffolding Ltd | Construction | 2012 |
| Gemini Assets Ltd | Hospitality | 2020 |
| Gemini Flooring (NE) Limited | Construction | 2020 |
| Gemini North East Limited | Real estate | 2025 |
| Gems Cricket Club CIC | Arts & recreation | 2024 |
| Genaixa Ltd | Other services | 2025 |
| Gene Cure Ltd | Information & communication | 2023 |
| General Health Limited | Health & social care | 2022 |
| Generational Asset Protection Ltd | Professional & scientific | 2010 |
| Generic A.I. Applications Limited | Information & communication | 2014 |
| Geneva and London Property Limited | Extraterritorial | 2013 |
| Genoah Developments Limited | Real estate | 2021 |
| Gentle Touch Laser Ltd | Other services | 2019 |
| GEO - Drill Limited | Construction | 2006 |
| Geo-Drill Services Limited | Administrative & support | 2011 |
| Geoghegan Capital Ltd. | Financial services | 2026 |
| Geol Consultants Holdings Ltd | Financial services | 2024 |
| Geol-Consultants Limited | Professional & scientific | 2000 |
| Geomatic Systems Ltd | Manufacturing | 2010 |
| Geon Training Solutions Ltd | Education | 2015 |
| Geordie Ghost Hunter Media Operations Limited | Information & communication | 2023 |
| Geordie Ghost Hunters and Paranormal Investigators Limited | Arts & recreation | 2021 |
| Geordie Offshore Ltd | Administrative & support | 2017 |
| George's North East Ltd | Real estate | 2009 |
| Gesha (NE) Ltd | Manufacturing | 2026 |
| Gesher | Education | 2011 |
| GET Carter Holdings Ltd | Financial services | 2023 |
| GET Carter Productions Limited | Professional & scientific | 2003 |
| GET Fit North East Limited | Arts & recreation | 2013 |
| GET Jammy Ltd | Information & communication | 2021 |
| GET the Badge in Newcastle Ltd | Wholesale & retail | 2024 |
| GF18 Group Holdings Ltd | Financial services | 2025 |
| GG Gaming Network Ltd | Information & communication | 2025 |
| GGH Building Services Ltd | Construction | 2024 |
| GGM NE Ltd | Wholesale & retail | 2022 |
| GGN Investment Ltd | Real estate | 2021 |
| GH Business Sales Ltd | Wholesale & retail | 2020 |
| GH Car Sales Center Ltd | Wholesale & retail | 2021 |
| GH Energy Limited | Construction | 2011 |
| GH Flooring Ltd | Construction | 2019 |
| GH Global Holdings Ltd | Construction | 2022 |
| GH Group UK (2018) Ltd | Real estate | 2003 |
| Ghadri Ltd | Health & social care | 2020 |
| Ghag Stores Ltd | Wholesale & retail | 2018 |
| GHD Props Ltd | Real estate | 2025 |
| Gibside Community Farm Community Interest Company | Agriculture & fishing | 2013 |
| Gibson Aerials Limited | Administrative & support | 2002 |
| Gibson Foods Limited | Manufacturing | 2020 |
| Gibson Group Investments Ltd | Real estate | 2021 |
| Gift Gallery Presentations Ltd | Wholesale & retail | 2023 |
| Gift Some Happy Ltd | Wholesale & retail | 2019 |
| Gilbert Real Estate Ltd | Real estate | 2023 |
| Giles Interiors Ltd | Construction | 2025 |
| Gilesgate Plumbing & Bathroom Supplies Ltd | Wholesale & retail | 2018 |
| Gill's Thorney Close Ltd | Wholesale & retail | 2020 |
| Gills Golden North East Ltd | Hospitality | 2017 |
| Giullari Ltd | Manufacturing | 2018 |
| GJ Boss Ltd | Real estate | 2020 |
| Gjps Trust Fund | Education | 2006 |
| GJW Management Services Ltd | Professional & scientific | 2022 |
| GK Bosor Ltd | Hospitality | 2018 |
| GK Health Limited | Health & social care | 2014 |
| GK Milk Ltd | Hospitality | 2019 |
| GKJ Haematology Communications Ltd | Health & social care | 2018 |
| Gladstone Carpentry Ltd | Manufacturing | 2023 |
| Glamlox Hair and Beauty Ltd | Other services | 2021 |
| Glatt Bakery Ltd | Wholesale & retail | 2024 |
| Glatt Butcher & Deli Ltd | Wholesale & retail | 2020 |
| GLC Limited | Wholesale & retail | 2024 |
| Gleaming Spring ENTER10MENT Limited | Professional & scientific | 2024 |
| Gleeburn Ltd | Real estate | 2004 |
| Glendon Consulting Limited | Information & communication | 2013 |
| Glenfield Control Processes Ltd | Information & communication | 2020 |
| Glengyle Commercial Consultants Limited | Professional & scientific | 2013 |
| Glenkemp Limited | Professional & scientific | 2014 |
| Glenrock | Construction | 1961 |
| Glitchbar Limited | Hospitality | 2025 |
| Glitterball Developments Ltd | Construction | 2025 |
| GLM Technical Ltd | Wholesale & retail | 2019 |