| George Vyner Limited | Information & communication | 2006 |
| Ghost UK Properties Ltd | Households | 2024 |
| Gibby Consulting Ltd | Professional & scientific | 2014 |
| Gilgar Consultancy Ltd | Professional & scientific | 2023 |
| Gilliland Farms Limited | Agriculture & fishing | 2000 |
| Gingecko Ltd | Administrative & support | 2023 |
| Giraffa Limited | Construction | 2011 |
| Girls CAN DO Anything Ltd | Information & communication | 2022 |
| Gisland House Management Company Limited | Households | 2007 |
| Glenn Nattrass Electrical Limited | Manufacturing | 2013 |
| Global Gorilla Limited | Professional & scientific | 2018 |
| Global Treasury Consultants UK Limited | Professional & scientific | 2014 |
| Go Green (2007) Limited | Water & waste | 2007 |
| Go Pro NOW Limited | Wholesale & retail | 2011 |
| Golden Dragon Hexham Ltd | Hospitality | 2025 |
| Good Roots Collective CIC | Education | 2026 |
| Gordon Dodd Consultancy Ltd | Professional & scientific | 2011 |
| Grace & Purpose Ltd | Wholesale & retail | 2024 |
| Grafikm Design Limited | Professional & scientific | 2010 |
| Graham Reader Motor Engineer Limited | Wholesale & retail | 2006 |
| Graham Stables Planning Services Limited | Construction | 2020 |
| Grasp (UK) Limited | Transport & logistics | 2014 |
| Grasp Aviation Limited | Manufacturing | 2015 |
| GRC Property Developments Limited | Construction | 2015 |
| Great Divide Engineering Ltd | Professional & scientific | 2022 |
| Greedy Sheep Inns Limited | Hospitality | 2002 |
| Green Team Partnership Ltd | Construction | 2011 |
| Greenhead Hostel LLP | | 2024 |
| Greenhead Hotel Brampton LLP | | 2020 |
| Greenridge Farm | Administrative & support | 2009 |
| Gregarious Games Limited | Manufacturing | 2019 |
| Grey Street Properties (NE) Limited | Construction | 2016 |
| Grieve Farming | Administrative & support | 2011 |
| Ground Branch Ltd | Real estate | 2025 |
| Grove Pond Yachts Ltd. | Manufacturing | 2016 |
| GT Cranes UK Limited | Manufacturing | 2024 |
| Guerrilla Working Ltd | Administrative & support | 2017 |
| Guidepost Leadership Ltd | Education | 2012 |
| GUY Nicholson Surveyors Limited | Real estate | 2011 |
| Gwallace Flooring Ltd | Wholesale & retail | 2019 |
| GWC North Ltd | Hospitality | 2023 |
| H.S.M. (NE) Ltd | Other services | 2011 |
| Haartech Ltd | Professional & scientific | 2026 |
| Hadrian Developments (Hexham) LLP | | 2023 |
| Hadrian EYE Solutions 2025 Limited | Administrative & support | 2025 |
| Hadrian Hotel Limited | Hospitality | 2006 |
| Hadrian Learning Trust | Education | 2016 |
| Hadrian Property Partners LLP | | 2019 |
| Hadrian Renewables Ltd | Energy | 2012 |
| Hall Hill Farm Shop Limited | Wholesale & retail | 2023 |
| Halliwell Dene Limited | Extraterritorial | 1996 |
| Halls of Data Ltd | Information & communication | 2025 |
| Hallside Limited | Construction | 2019 |
| Hamilton Building and Joinery Services Limited | Construction | 2016 |
| Hamilton Buildings Limited | Real estate | 2016 |
| Hamish Scott Holdings Ltd | Other services | 2018 |
| Hancockhamlin Ltd | Professional & scientific | 2020 |
| Hardhaugh Residents' Management Company Limited | Households | 2021 |
| Harnham Hall Farming Limited | Agriculture & fishing | 2022 |
| Harper's Environment | Professional & scientific | 2024 |
| Harry Douglas Ltd | Real estate | 2023 |
| Haugh Lane Garage Ltd | Wholesale & retail | 2013 |
| Hawkeye Mechanical Engineering Limited | Professional & scientific | 2025 |
| Haydon Bridge and Haydon Parish Development Trust | Other services | 2009 |
| HDC Distribution Ltd | Wholesale & retail | 2024 |
| HDO Investments Limited | Real estate | 2019 |
| HE Servicing Ltd | Construction | 2012 |
| Healthylife SIM Community Interest Company | Professional & scientific | 2016 |
| Hear IT Ltd | Professional & scientific | 2000 |
| Heart of Allen Valley Ltd | Health & social care | 2022 |
| Hearthlyte Studios Ltd | Information & communication | 2025 |
| Heartstone House Ltd | Professional & scientific | 2023 |
| Hebburn Properties (NE) Limited | Households | 2015 |
| Hedley & Spark Limited | Construction | 2020 |
| Hedley Planning Services Limited | Administrative & support | 2012 |
| Hencotes Management Company Limited | Households | 1994 |
| Henderson & Harrison Limited | Construction | 2013 |
| Henderson Fitted Furniture Limited | Manufacturing | 2002 |
| Hendy Consultancy Ltd | Professional & scientific | 2025 |
| Henshaw Nursery | Education | 2009 |
| Herip Limited | Professional & scientific | 2012 |
| Heritage Consolidation Limited | Construction | 2008 |
| Hesleyside Forest Bathing Limited | Hospitality | 2019 |
| Hesleyside Heating Limited | Energy | 2013 |
| Hesleyside Leisure Limited | Hospitality | 2020 |
| Hexdale Consultants Ltd | Construction | 2023 |
| Hexham Abbey Trading Limited | Wholesale & retail | 2011 |
| Hexham Book Festival C.I.C | Arts & recreation | 2008 |
| Hexham Business Park Ltd | Real estate | 2025 |
| Hexham Canoe Club | Arts & recreation | 2010 |
| Hexham Classic Cars Limited | Wholesale & retail | 2024 |
| Hexham Community LED Housing | Administrative & support | 2018 |
| Hexham Community Partnership | Administrative & support | 2006 |
| Hexham Computer Services Limited | Other services | 2014 |
| Hexham Dental Clinic | Health & social care | 2012 |
| Hexham Farmers Market Limited | Wholesale & retail | 2001 |
| Hexham Fish Bar Ltd | Hospitality | 2021 |
| Hexham Golf and Hospitality Limited | Administrative & support | 2016 |
| Hexham Holiday Homes LLP | | 2021 |
| Hexham Hospitality Ltd | Hospitality | 2023 |