| Heather’S Home Ltd | Wholesale & retail | 2026 |
| Hebburn Village (Phases 5 and 6) Flats Management Company Limited | Households | 1994 |
| Helm Stays Ltd | Real estate | 2026 |
| Helping Hands 4 YOU Clean & Care Ltd | Construction | 2023 |
| Hemmer Coatings Ltd | Construction | 2018 |
| Herban International Ltd | Agriculture & fishing | 2025 |
| Herban UK Ltd | Agriculture & fishing | 2014 |
| Herbs Huts Limited | Construction | 2021 |
| Herd Sands Ltd | Health & social care | 2021 |
| HFA Energy Consultancy Limited | Professional & scientific | 2023 |
| HFR Safety Ltd | Professional & scientific | 2023 |
| Hgvtruck-Tech Ltd | Wholesale & retail | 2023 |
| HH Trades Ltd | Wholesale & retail | 2024 |
| Hi-Spec Construction NE Ltd | Construction | 2018 |
| Hi-Spec Property Services Ltd. | Construction | 2014 |
| Hi-Spec Windows (NE) Ltd | Construction | 2025 |
| Hi-Spec Windows Ltd | Construction | 2018 |
| Hickford Property Ltd | Real estate | 2021 |
| Higgs Family Holdings Ltd | Financial services | 2022 |
| Higgs Investments Ltd | Information & communication | 2021 |
| High Performance Culture Ltd | Professional & scientific | 2025 |
| Highfield Access Services Ltd | Professional & scientific | 2013 |
| Highfield Fisheries South Shields Limited | Hospitality | 2017 |
| Highfield Plumbing & Heating Limited | Construction | 2010 |
| Highfield Service Centre Ltd | Wholesale & retail | 2002 |
| Highshield Advanced Ltd | Construction | 2025 |
| Hillside Electrical Limited | Construction | 2026 |
| Hire Your Chef Ltd | Hospitality | 2019 |
| Hivr Energy Solutions Ltd | Professional & scientific | 2024 |
| HJA Holdings NE Ltd | Professional & scientific | 2022 |
| Hkbites Ltd | Hospitality | 2025 |
| HLW Medics Limited | Health & social care | 2024 |
| HM Renewables Ltd | Manufacturing | 2019 |
| HN Car Sales Ltd | Wholesale & retail | 2026 |
| HN Elite Cars Ltd | Wholesale & retail | 2020 |
| HNE Properties Ltd | Real estate | 2025 |
| Hogg Builders Ltd | Construction | 2025 |
| Holiday & Residential Lettings Ltd | Real estate | 2021 |
| Hollsdan Electrical Services Ltd. | Construction | 2014 |
| Holmfirth Finance Limited | Administrative & support | 1962 |
| Holtby Homes Ltd | Real estate | 2026 |
| Holy Trinity Church of England Academy (South Shields) Trust | Education | 2014 |
| Holyfields York Apartments Management Limited | Real estate | 2007 |
| Home Trader Northern Limited | Construction | 2005 |
| Homease Ltd | Other services | 2025 |
| Homeseal Home Insulations Ltd | Construction | 2020 |
| Hominins Limited | Wholesale & retail | 2025 |
| Honour Roofing Ltd | Construction | 2023 |
| Hoodex Boxing & Fitness Ltd | Wholesale & retail | 2024 |
| Hoopers Fruit & VEG Ltd | Wholesale & retail | 2023 |
| Horden Grange Residents Ltd | Other services | 2022 |
| Hornby Park Estate Management Company Limited | Households | 2006 |
| Hornby Park Properties Limited | Professional & scientific | 2003 |
| Horsley Hill (NE) Ltd | Wholesale & retail | 2025 |
| Houghton EX Electricals Limited | Construction | 2014 |
| Hound of the Suburbs Ltd | Information & communication | 2019 |
| House of Buyers Limited | Wholesale & retail | 2025 |
| House of Loco Ltd | Other services | 2023 |
| Housefull Motion Pictures Ltd | Information & communication | 2024 |
| Households Bargains Ltd | Wholesale & retail | 2024 |
| Hovaz Ltd | Real estate | 2026 |
| Howe Consultancy Limited | Professional & scientific | 2010 |
| HQ Engineering Group Ltd | Professional & scientific | 2026 |
| HQ Fabrication Limited | Professional & scientific | 2017 |
| HR Apex Properties Limited | Real estate | 2026 |
| Hudson Street Leisure Limited | Hospitality | 2019 |
| Hunterspainters Ltd | Construction | 2026 |
| Hussains Rice and Spice Limited | Hospitality | 2024 |
| Hyjc Ltd | Professional & scientific | 2025 |
| Hyper Coatings Limited | Wholesale & retail | 2020 |
| I&S Development Ltd | Construction | 2026 |
| I.G.H.Manufacturing Ltd | Manufacturing | 2020 |
| I.T.S. Entertainment C.I.C. | Arts & recreation | 2021 |
| Iamp LLP | | 2016 |
| IAN Jewitt Marine Services Ltd | Construction | 2014 |
| IAN Tate Holdings Ltd | Construction | 2022 |
| Ic&E Limited | Professional & scientific | 2016 |
| Ice Print and Design Ltd | Wholesale & retail | 2013 |
| Iconic Property Ltd | Real estate | 2025 |
| Ideh Access Ltd | Construction | 2025 |
| IGC Retail Ltd | Wholesale & retail | 2024 |
| IGC Rigging Limited | Professional & scientific | 2023 |
| Ikru Limited | Hospitality | 2025 |
| IL Soft Limited | Information & communication | 2003 |
| Illuminare Business Services Limited | Other services | 2017 |
| Image Studio Photography Limited | Professional & scientific | 2020 |
| Impact Family Services | Health & social care | 1997 |
| Imperial Windows and Doors Ltd | Construction | 2019 |
| Indian Brasserie (UK) Ltd | Hospitality | 2012 |
| Indiran Minimart Ltd | Wholesale & retail | 2023 |
| Industrial PC Solutions Ltd | Manufacturing | 2008 |
| Inertia Business Solutions Limited | Real estate | 2015 |
| Infinite ED Ltd | Education | 2025 |
| Infinity Web Creations Ltd | Information & communication | 2024 |
| Initial Images Embroidery Ltd | Manufacturing | 2010 |
| Inner YOU UK Ltd | Wholesale & retail | 2018 |
| Innovape Limited | Wholesale & retail | 2023 |
| Install AI Ltd | Information & communication | 2025 |
| Instant Expert Advice Ltd | Construction | 2015 |
| Integrity Engineering Group Ltd | Professional & scientific | 2026 |