| Gurinder Singh DD Limited | Transport & logistics | 2025 |
| Gurney Casino Limited | Professional & scientific | 2010 |
| GV Plant Hire Ltd | Administrative & support | 2018 |
| GVE (Holdings) Limited | Financial services | 2020 |
| GW Darts Limited | Wholesale & retail | 2024 |
| GW Support Ltd | Administrative & support | 2026 |
| Gwaw Ltd | Construction | 2020 |
| Gwco Consult Ltd | Professional & scientific | 2023 |
| GWM Earthworks Limited | Construction | 2023 |
| Gyder Ltd | Information & communication | 2019 |
| Gymmad Gymnastics Academy Limited | Arts & recreation | 2017 |
| Gymmad Limited | Other services | 2016 |
| H & a Joinery Services Limited | Construction | 2021 |
| H & H Double Glazing Limited | Construction | 2009 |
| H (Warrington) Limited | Extraterritorial | 2012 |
| H B Technologies Limited | Professional & scientific | 1991 |
| H F S (Hutchinson Financial Services) Limited | Financial services | 2020 |
| H&H Agriservices Ltd | Administrative & support | 2019 |
| H&M Wholesale Limited | Wholesale & retail | 2019 |
| H&Re Ltd | Construction | 2018 |
| H.A.S Solutions DL Ltd | Construction | 2025 |
| HAB Northern Ltd | Construction | 2012 |
| Habiv Care & Support Ltd | Health & social care | 2025 |
| Hadfield Property Ltd | Real estate | 2020 |
| Hainton Recruitment Group Limited | Administrative & support | 2015 |
| Hair and Beauty Directory Limited | Information & communication | 2025 |
| Hair by North East Limited | Other services | 2013 |
| Hajo Engineering Limited | Administrative & support | 2012 |
| Half Shell Studios Ltd | Information & communication | 2024 |
| Hall Design North East Ltd | Professional & scientific | 2020 |
| Halls Motor Bodyworks Limited | Wholesale & retail | 2020 |
| Hall’S Garden Maintenance Ltd | Administrative & support | 2023 |
| Halo Physiotherapy Ltd | Health & social care | 2024 |
| Halt Hire Ltd | Administrative & support | 2016 |
| Hamilton Coverdale Ltd | Administrative & support | 2023 |
| Hamilton Land and Development Limited | Real estate | 2018 |
| Hamilton Willis Land & Development Limited | Real estate | 2019 |
| Hamiltonridge Ltd | Construction | 2025 |
| Hammad Manzoor Limited | Wholesale & retail | 2025 |
| Hamper Happiness Ltd | Wholesale & retail | 2026 |
| Hampshire Estates Partnership Limited | Real estate | 2011 |
| Hamy Nails & Spa Ltd | Other services | 2025 |
| Hamza’S E-Commerce Ltd | Wholesale & retail | 2025 |
| Hancock & Ainsley Limited | Wholesale & retail | 2003 |
| Handcraftdbyjon Ltd | Construction | 2015 |
| Hanlon & Stewart Holdings Ltd | Financial services | 2026 |
| Hannah & Harry Property Investment Ltd | Real estate | 2025 |
| Hanover Blue Services Limited | Construction | 2018 |
| Happy Host Holidays Limited | Hospitality | 2024 |
| Happy Space Teesside Ltd | Arts & recreation | 2024 |
| Happy Spoon Ltd | Wholesale & retail | 2016 |
| HAR Houses Ltd | Real estate | 2023 |
| Harding Industrial Solutions Limited | Construction | 2015 |
| Hardlife Fightwear Ltd | Wholesale & retail | 2024 |
| Hardpath Consulting Ltd | Information & communication | 2016 |
| Hardwick Advisory Ltd | Professional & scientific | 2025 |
| Hardwick Integrity Consultancy Limited | Professional & scientific | 2018 |
| Hardwick Leisure Limited | Hospitality | 2026 |
| Harewood Inspection Services Ltd | Professional & scientific | 2023 |
| Harjax Global Services Ltd | Professional & scientific | 2026 |
| Harker Commercials Ltd | Wholesale & retail | 2025 |
| Harker Properties Limited | Real estate | 2015 |
| Harlea Homes Limited | Real estate | 2007 |
| Harmax Property Services Ltd | Construction | 2025 |
| Harmont Taverns Limited | Hospitality | 2025 |
| Haroon Legacy Enterprises Ltd | Wholesale & retail | 2025 |
| Harper Rental Refurbishments Ltd | Construction | 2005 |
| Harper-Chahal Consultancy Ltd | Professional & scientific | 2023 |
| Harpers Golf & Leisure Company Limited | Arts & recreation | 1989 |
| Harpers Greenworks Ltd | Administrative & support | 2024 |
| Harpers Landscape and Garden Services Ltd | Administrative & support | 2026 |
| Harpington Limited | Extraterritorial | 2021 |
| Harrington House Holdings Limited | Financial services | 2018 |
| Harris & Mulloy Limited | Construction | 2019 |
| Harris H&S Ltd | Construction | 2020 |
| Harrogate Timber Limited | Wholesale & retail | 2003 |
| Harrow Consulting (Newcastle) Limited | Professional & scientific | 2014 |
| Harrtech Services Limited | Professional & scientific | 2003 |
| Harry’S Seaton Ltd | Hospitality | 2024 |
| Hart and Soul Trading Limited | Wholesale & retail | 2012 |
| Hart Family Accountancy Limited | Professional & scientific | 2015 |
| Hartann Ltd. | Wholesale & retail | 2017 |
| Hartburn Accountancy Limited | Professional & scientific | 2011 |
| Hartburn Consultants Limited | Professional & scientific | 2007 |
| Hartburn Holdings (N.E) Limited | Financial services | 2024 |
| Hartburn Hounds Ltd | Other services | 2025 |
| Hartburn Plastering Ltd | Construction | 2023 |
| Hartburn Properties Limited | Real estate | 2025 |
| Hartburn Village Management Limited | Extraterritorial | 2009 |
| Hartlepool and Stockton Health Ltd | Health & social care | 2016 |
| Hartlepool Stags Junior Football Club Ltd | Arts & recreation | 2025 |
| Hartley Property Services (NE) Ltd | Construction | 2013 |
| Hartleys Leisure Parks Limited | Hospitality | 2025 |
| Hartleys Luxury Lodges Limited | Hospitality | 2023 |
| Harvey Cooper Ltd | Real estate | 2020 |
| Harveyc Ltd | Construction | 2025 |
| Harwood Power Services Ltd | Construction | 2025 |
| Hassall Limited | Manufacturing | 2003 |
| Hassan Express Limited | Professional & scientific | 2025 |
| Haus of Design Limited | Wholesale & retail | 2008 |