| GCR Offshore Construction Limited | Construction | 2023 |
| GCS Estates Ltd | Real estate | 2025 |
| Gecko Outdoor Living Ltd | Wholesale & retail | 2021 |
| Gecko Testing Solutions Limited | Information & communication | 2007 |
| Generations Windows & Glass Ltd | Construction | 2024 |
| Geobri Limited | Construction | 2023 |
| Georgetown University | | 2023 |
| GFS ( NW ) Limited | Wholesale & retail | 2025 |
| Ghag North East Ltd | Wholesale & retail | 2010 |
| Gibson Copy Limited | Administrative & support | 2020 |
| Gilchrist Physiotherapy Services Ltd. | Health & social care | 2016 |
| Gill Main Developments Limited | Other services | 2012 |
| GK Fabrications Limited | Manufacturing | 2012 |
| Global Reach Connections Limited | Wholesale & retail | 2025 |
| GMC GRP Ltd | Construction | 2020 |
| Gmcc Properties Limited | Real estate | 2022 |
| Go Move Limited | Real estate | 2023 |
| Go-Web Ltd | Information & communication | 2018 |
| Gold Leaf Foods Limited | Administrative & support | 2005 |
| Goldcrop Properties Ltd | Real estate | 2019 |
| Golden FRY Inn Limited | Hospitality | 2004 |
| Good Guarding Ltd | Transport & logistics | 2021 |
| Governor, Leadership & Management Associates LP | | 2011 |
| Gowland and Dawson Limited | Construction | 2001 |
| GR Groundwork’S Ltd | Construction | 2026 |
| Gragareth Way 1972 Limited | Extraterritorial | 2013 |
| Graham Watson Training & Development Ltd | Other services | 2019 |
| Grail Design Limited | Administrative & support | 2019 |
| Grande Ltd | Other services | 2023 |
| Grandora Property Investment Ltd | Real estate | 2025 |
| Graystones Robin Hoods Bay Limited | Hospitality | 2019 |
| Great Oak Engineers Ltd | Professional & scientific | 2018 |
| Green Chili Limited | Hospitality | 2025 |
| Green GAS & Power Ltd | Professional & scientific | 2025 |
| Green Horizon Eco Solutions Ltd | Administrative & support | 2021 |
| Green Roof Property Limited | Construction | 2019 |
| Greenhome Group (North East) Limited | Professional & scientific | 2020 |
| Greenhome Heating Limited | Construction | 2016 |
| Greenhome Properties (North East) Limited | Real estate | 2020 |
| Greens Plumbing and Heating Services (NE) Limited | Other services | 2014 |
| Grey Material Ltd | Hospitality | 2015 |
| Griffith Textile Machines Limited | Manufacturing | 1984 |
| Grovefox Limited | Construction | 2017 |
| GRS NE Limited | Real estate | 2025 |
| GSB Thfc Limited | Transport & logistics | 2025 |
| Guildhall Quayside Limited | Hospitality | 2016 |
| Gulzar Bibi Properties Ltd | Real estate | 2016 |
| Gunstocks Ltd | Manufacturing | 2025 |
| GUS Real Estate Ltd | Real estate | 2024 |
| GVC Destinations Ltd | Hospitality | 2019 |
| GWN Resources Limited | Extraterritorial | 2014 |
| Gypsydoc Limited | Health & social care | 2010 |
| H Change Ltd | Information & communication | 2022 |
| H Housing Ltd | Real estate | 2022 |
| H.M.H. Sheet Metal Fabrications Limited | Manufacturing | 1971 |
| Hadrian Air Conditioning and Refrigeration Company Limited | Energy | 1985 |
| Hadrian Facilities Limited | Professional & scientific | 2018 |
| Hagan Machine Tool Services Ltd | Manufacturing | 2014 |
| Hahn Medical Ltd | Health & social care | 2023 |
| Hails Investments Limited | Financial services | 2026 |
| Hair by Orrell Ltd | Other services | 2024 |
| Hair by Raffeles Limited | Other services | 2016 |
| Hairbyhair Ltd | Health & social care | 2025 |
| Haire Properties Limited | Real estate | 2024 |
| Haley Properties Limited | Real estate | 2012 |
| Halifax House Uxbridge RTM Company Limited | Real estate | 2025 |
| Halls Garage Ltd | Wholesale & retail | 2007 |
| Haloed IO CIC | Information & communication | 2025 |
| Hambard Services Ltd | Construction | 2024 |
| Hamlyn Associates Limited | Construction | 1996 |
| Hamlyn Consultants Limited | Professional & scientific | 2026 |
| Hancock Gallery Limited | Wholesale & retail | 2017 |
| Hannah Graham Story Teller Limited | Information & communication | 2025 |
| Happy Days Investments Ltd | Real estate | 2022 |
| Hardman Grey Ltd | Administrative & support | 2022 |
| Hark Group Holdings Ltd | Financial services | 2020 |
| Harraton Properties Limited | Real estate | 2006 |
| Harrison Handmade Ltd | Manufacturing | 2016 |
| Hart Financial Solutions Limited | Financial services | 2019 |
| Hartech Automation Ltd | Manufacturing | 2001 |
| Harvest Evangelism UK | Other services | 2001 |
| Hattersley Air Tools & Hydraulics Ltd | Manufacturing | 2021 |
| Hausfeld & Co LLP | | 2023 |
| Hawthorns (UK) Limited | Administrative & support | 2013 |
| Hawthorns Logistics Limited | Transport & logistics | 2009 |
| Haylo Transport Limited | Transport & logistics | 2025 |
| HD Lets Ltd | Real estate | 2019 |
| Headspace Ventures Limited | Professional & scientific | 2022 |
| Headway Wearside | Other services | 2011 |
| Healthy Homes North East Ltd | Professional & scientific | 2025 |
| Heatkeeper Ltd | Manufacturing | 2025 |
| Heavisides Investments Limited | Professional & scientific | 2026 |
| Hedley Developments Limited | Real estate | 1991 |
| Helens Residential & Maintenance Ltd | Real estate | 2025 |
| Helix Care Limited | Health & social care | 2022 |
| HEN Solo Limited | Hospitality | 2025 |
| Henry James Law Ltd | Professional & scientific | 2016 |
| Henry James Legal Ltd | Professional & scientific | 2018 |
| Henry's Bar NE Ltd | Hospitality | 2026 |
| Heritage Cues Ltd | Wholesale & retail | 2025 |