| Happy Tails Professional Dog Grooming Ltd | Other services | 2014 |
| Happyhomes North Limited | Real estate | 2019 |
| Hardy Aerospace Limited | Professional & scientific | 2005 |
| Harelaw Sawmill Limited | Manufacturing | 2004 |
| Hargreaves Elsworth Limited | Professional & scientific | 2006 |
| Harper Harlyn Consulting Ltd. | Professional & scientific | 2014 |
| Harrison Architectural Ltd | Construction | 2019 |
| Harrison Wind Ltd | Energy | 2023 |
| Harrison's Newcastle Deliveries Limited | Transport & logistics | 2020 |
| Hartridge Buddhist Monastery Trust | Other services | 2010 |
| Hastie Burton Joinery Ltd | Manufacturing | 2004 |
| Haus Distribution Ltd | Wholesale & retail | 2019 |
| Hausco Limited | Extraterritorial | 2021 |
| Haven Adventures CIC | Education | 2026 |
| Haydn Grey Ltd | Information & communication | 2012 |
| Haydon Accountancy Services Limited | Professional & scientific | 2018 |
| Haydon Utility Services Limited | Administrative & support | 2025 |
| Hazeldene Accounting Services Ltd | Professional & scientific | 2020 |
| HB Joinery & Construction Limited | Construction | 2017 |
| Hbrothers PK Limited | Wholesale & retail | 2022 |
| HC Law LLP | | 2009 |
| HDI Quayside Ltd | Hospitality | 2017 |
| Hearn Tutoring Limited | Education | 2026 |
| Heartbreak Recordings Ltd | Information & communication | 2024 |
| Heaton Electrical Engineering Services Ltd | Construction | 2023 |
| Heaven Therapy Ltd | Other services | 2015 |
| Hedley Hughes Home Improvements Ltd | Professional & scientific | 2020 |
| Hedley's Auto Care Ltd | Wholesale & retail | 2025 |
| Hedleys Trade Enterprise Limited | Wholesale & retail | 2025 |
| Hedley’S Recovery Ltd | Transport & logistics | 2025 |
| Hedlong Construction Ltd | Construction | 2026 |
| Helen Surana Limited | Professional & scientific | 2021 |
| Helix Arts Limited | Health & social care | 1987 |
| Helix Residential Ltd | Real estate | 2024 |
| Helme Property Investment Ltd | Real estate | 2020 |
| Helme Property Ltd | Real estate | 2020 |
| Helpquick Limited | Information & communication | 2005 |
| Helsaya Limited | Manufacturing | 2016 |
| Hemmex Ltd | Construction | 2025 |
| Hendersons Electrical Limited | Construction | 2025 |
| Hendlesby & Sons Holdings Ltd | Financial services | 2025 |
| Hendtec Ltd | Construction | 2023 |
| Henry IX Limited | Arts & recreation | 2014 |
| Here YOU Belong Limited | Information & communication | 2024 |
| Heritage Floor Sanding Ltd | Construction | 2025 |
| Hero Blades and Brew Ltd | Other services | 2024 |
| Heyup Limited | Manufacturing | 2015 |
| Hi-Fi Subjectivist Audio Ltd | Wholesale & retail | 2019 |
| Hi-Flo Developments Limited | Construction | 2020 |
| High View Properties NE Ltd | Real estate | 2026 |
| Higher Effect CIC | Professional & scientific | 2014 |
| Highland Farm Foods Ltd | Hospitality | 2019 |
| Hike International Ltd | Construction | 2014 |
| Hindle Campbell Limited | Professional & scientific | 2011 |
| HIS and Hers Building Services Ltd | Agriculture & fishing | 2021 |
| Historic Property Restoration Limited | Construction | 1995 |
| HJR Joinery Ltd | Manufacturing | 2026 |
| HLS Access Ltd | Professional & scientific | 2019 |
| HMC Asset Management Ltd | Professional & scientific | 2019 |
| HN Design Ltd | Professional & scientific | 2023 |
| Hogan and Arend LLP | | 2026 |
| Hola Casita Ltd | Education | 2025 |
| Holder House Garden Community Interest Company | Health & social care | 2008 |
| Holistic Integrity Consulting Ltd | Professional & scientific | 2017 |
| Holywell Mews Management Limited | Households | 1989 |
| Home and Leisure International Limited | Wholesale & retail | 1988 |
| Hone Digital Ltd | Information & communication | 2018 |
| Hope Solutions & Technitions Ltd | Mining & quarrying | 2019 |
| Horatio Holdings Limited | Financial services | 2015 |
| Hospitality Northumberland Ltd | Real estate | 2025 |
| House of Bebe Limited | Wholesale & retail | 2022 |
| House of Grandeur Limited | Professional & scientific | 2025 |
| House of Isabella Limited | Wholesale & retail | 2019 |
| House of Orkney Education Limited | Education | 2026 |
| House Seven Wellness Ltd | Administrative & support | 2010 |
| Howard Court (North Shields) Management Company Limited | Administrative & support | 1995 |
| Howie Aitchison Ltd | Manufacturing | 2025 |
| HPR Construction Limited | Construction | 1998 |
| HPR Trustee Limited | Construction | 2022 |
| Hseq & Inspection Services Ltd | Professional & scientific | 2024 |
| Hubberston Offshore Charters Limited | Agriculture & fishing | 2019 |
| Hudshaw Ltd | Education | 2025 |
| Hunteraccess Limited | Other services | 2018 |
| Hurren & Jubb Accountants Limited | Professional & scientific | 1995 |
| Hurren & Jubb Properties Limited | Real estate | 2021 |
| Huscrofts Decorative Salvage Ltd | Wholesale & retail | 2021 |
| Husk Design Limited | Construction | 2014 |
| Husk Northern Limited | Construction | 2018 |
| Husk Partnerships Limited | Construction | 2018 |
| Hvac-Sanitary Limited | Other services | 2018 |
| Hybrid Workshop UK Ltd | Wholesale & retail | 2025 |
| Hydro Bathrooms & Plumbing Limited | Construction | 2025 |
| Hyem Home Ltd | Real estate | 2025 |
| Hype Film Limited | Information & communication | 2006 |
| Hyper North Ltd | Professional & scientific | 2017 |
| Hyper Trail Limited | Manufacturing | 2024 |
| Hyperklean Ltd | Administrative & support | 2004 |
| I Love North Shields CIC | Information & communication | 2024 |
| I Love Office Supplies Limited | Administrative & support | 2004 |
| I-Shine N.E Ltd | Administrative & support | 2020 |