| Game on Solutions Ltd | Information & communication | 2026 |
| Gary Hunton Fayers Limited | Professional & scientific | 2019 |
| Gazelle Web-Tech Ltd | Information & communication | 2020 |
| Geek Box Gaming Ltd | Wholesale & retail | 2019 |
| Gibson Utilities Limited | Construction | 2025 |
| GK Architects Limited | Professional & scientific | 2013 |
| Go Cladding Services Limited | Construction | 2014 |
| Goodwill Healthcare Services Limited | Health & social care | 2018 |
| Gourmet Food Options Ltd | Wholesale & retail | 2020 |
| Graham Newco Ltd | Administrative & support | 2021 |
| Granit Bizz Ltd | Wholesale & retail | 2024 |
| Grass Roots Music C.I.C. | Arts & recreation | 2020 |
| GRID18 Ltd | Transport & logistics | 2025 |
| Grim Reaper Limited | Wholesale & retail | 2022 |
| Ground Improvements Limited | Construction | 2004 |
| GVR Geoservices Ltd | Professional & scientific | 2020 |
| Hall's Meat and Poultry Limited | Manufacturing | 2023 |
| Hamilton Roofing & Cladding Limited | Construction | 2010 |
| Handy AL Ltd | Other services | 2025 |
| Hanjamemi Group Ltd | Construction | 2022 |
| Hans Kollders Ltd | Manufacturing | 2022 |
| Harrison Commercial Properties (NE) Ltd | Construction | 2021 |
| Hayes Leisure Holdings Ltd | Financial services | 2025 |
| Health Performance Limited | Health & social care | 2014 |
| Henderson Developments (NE) Ltd | Real estate | 2019 |
| Herring-Sykes (NE) Limited | Transport & logistics | 2019 |
| Hifi Vintage Ltd | Wholesale & retail | 2020 |
| Hindwest Developments Limited | Agriculture & fishing | 1995 |
| HMA Ventilation Services Limited | Construction | 2006 |
| Hookslink Digital Marketing Ltd | Professional & scientific | 2024 |
| HR Pro Support Limited | Administrative & support | 2022 |
| Hydram Engineering Limited | Manufacturing | 1994 |
| Iain Anderson Plastic Surgery Ltd | Health & social care | 2024 |
| IAN Thompson Limited | Wholesale & retail | 2014 |
| IAN Tregoning Limited | Administrative & support | 2010 |
| IDA Advisory Ltd | Professional & scientific | 2023 |
| Igrid Energy Limited | Professional & scientific | 2021 |
| Igym Ferryhill Ltd | Arts & recreation | 2022 |
| Ikarus Flight School Ltd | Education | 2022 |
| IN the Box Limited | Transport & logistics | 2002 |
| Inglefield Consulting Ltd | Professional & scientific | 2015 |
| Insights Air Range LLP | | 2019 |
| Irmc Ltd | Information & communication | 2022 |
| Istanbul Golden Barber Ltd | Other services | 2022 |
| J D Jowett Ltd | Construction | 2017 |
| J Lingard Property Company Ltd | Real estate | 2023 |
| J Lingard Site Services Ltd | Construction | 2018 |
| J.O. Construction & Developments Ltd | Construction | 2020 |
| J.Stevens Access Limited | Construction | 2025 |
| Jake of ALL Trades Ltd | Information & communication | 2026 |
| Jane Kerby Plastic Surgery Ltd | Health & social care | 2025 |
| JBS Property Portfolio Ltd | Real estate | 2026 |
| JEC Property Management Limited | Real estate | 2018 |
| JMB Commercial Ltd | Construction | 2023 |
| Jmdi Ltd | Wholesale & retail | 2023 |
| Joh's BKS Ltd | Professional & scientific | 2021 |
| Joker Clothing Ltd | Wholesale & retail | 2025 |
| JP Health (NE) Limited | Health & social care | 2020 |
| JR Joinery North East Ltd | Construction | 2018 |
| JRB Freelance Services Limited | Administrative & support | 2016 |
| JSR Recovery Services Ltd | Transport & logistics | 2024 |
| Jubilingo Ltd | Real estate | 2018 |
| Just Grass Angus Ltd | Wholesale & retail | 2018 |
| Jwnpainting Ltd | Manufacturing | 2025 |
| K & B Interiors Ltd | Wholesale & retail | 2013 |
| K.Marshall Rolling Stock Ltd | Professional & scientific | 2026 |
| Karelyn Properties Limited | Real estate | 2018 |
| KDL Associates Limited | Health & social care | 2021 |
| Kelly’S Commercial & Domestic Cleaning Services Ltd | Administrative & support | 2024 |
| Kepis Properties Limited | Real estate | 1992 |
| Keziah Limited | Wholesale & retail | 2024 |
| Killa Gorilla Kennels Limited | Administrative & support | 2025 |
| Kirsty Taylor Ltd | Professional & scientific | 2020 |
| KN Media Marketing Ltd | Arts & recreation | 2025 |
| KS2020 Limited | Public administration | 2019 |
| L & G Utilities Ltd | Energy | 2010 |
| L Brown Installations Ltd | Construction | 2018 |
| L X Consulting Engineers Limited | Professional & scientific | 2020 |
| LA Garenne Properties Ltd | Real estate | 2021 |
| Laidlaws Roadworks Limited | Construction | 2026 |
| Lamplight (Coxhoe) Ltd | Hospitality | 2024 |
| Land Trains for Hire Ltd | Administrative & support | 2025 |
| Lavery Entertainment Ltd | Information & communication | 2021 |
| Lawrence Earls Tractor Hire Limited | Administrative & support | 2017 |
| Leary's Property Development Ltd | Construction | 2019 |
| Leasideone Limited | Real estate | 2015 |
| Legacy Investment Property Ltd | Real estate | 2020 |
| Legacy Investment Trading Ltd | Wholesale & retail | 2020 |
| Leon CAD Ltd | Professional & scientific | 2015 |
| Lightrock Software Limited | Information & communication | 2015 |
| Lincoln Logistics Ltd | Transport & logistics | 2024 |
| Lineside Civils Ltd | Construction | 2022 |
| Lineside Maintenance Company Limited | Construction | 1997 |
| Liquor Store Ltd | Wholesale & retail | 2020 |
| Little Hands Limited | Wholesale & retail | 2018 |
| Little Land of Adventures Ltd | Education | 2020 |
| Liz&Sam Leisure Ltd | Hospitality | 2017 |
| LJB Decorators Ltd | Construction | 2025 |
| LJS Plotworks Limited | Construction | 2025 |
| Longnewton Property Services Limited | Other services | 2015 |