| Hagg Recruitment Limited | Construction | 2025 |
| Hahn Automation Ltd | Manufacturing | 2003 |
| HAI Northern Ltd | Real estate | 2024 |
| Haider Impex Ltd | Wholesale & retail | 2023 |
| Haidrix Ltd | Wholesale & retail | 2024 |
| Haim Ltd | Information & communication | 2024 |
| Haining Croft Management Company Limited | Real estate | 2007 |
| Hair & Beauty Boutique (Throckley) Limited | Other services | 2024 |
| Hair at Home Newcastle Ltd | Extraterritorial | 2016 |
| Hair by DKL Ltd | Other services | 2008 |
| Hair by Vasari Ltd | Other services | 2003 |
| Hair City Newcastle Ltd | Wholesale & retail | 2023 |
| Hair North East Limited | Wholesale & retail | 2009 |
| Hairmarjesty Limited | Other services | 2025 |
| Hairoom Limited | Other services | 2005 |
| Hairzone Ltd | Other services | 2013 |
| Hajra Sattar Optical Ltd | Wholesale & retail | 2022 |
| Hajrah Finds Ltd | Wholesale & retail | 2025 |
| Hake Limited | Hospitality | 2025 |
| Halcyon Paving Ltd | Construction | 2025 |
| Haldane Terrace Freehold Company Limited | Administrative & support | 2003 |
| Haley and Zillessen Ventures Limited | Information & communication | 2026 |
| Haley Carr Beauty Limited | Health & social care | 2018 |
| Half Systems Half People Ltd | Information & communication | 2021 |
| Halidon Health Ltd | Health & social care | 2014 |
| Halidon Homes Ltd | Real estate | 2021 |
| Hall & Partners (Special Projects) Limited | Professional & scientific | 1998 |
| Hallco 894 Management Co Limited | Real estate | 2003 |
| Halliday Capital Limited | Real estate | 2021 |
| Halls Durham Limited | Transport & logistics | 2010 |
| Halls Intl Ltd | Hospitality | 2020 |
| Halls of Heddon Limited | Wholesale & retail | 2000 |
| Halls Pharmacy ( North East ) Limited | Health & social care | 2012 |
| Hallside (Mowden Park) Managing Company Limited | Real estate | 2020 |
| Halman Thompson Limited | Professional & scientific | 2020 |
| Halo Barber Ltd | Other services | 2024 |
| Halo Digital Strategy Ltd | Professional & scientific | 2013 |
| Halo Hive Ltd | Information & communication | 2026 |
| Halo Pillow Ltd | Wholesale & retail | 2018 |
| Halthean Worldwide Limited | Professional & scientific | 2004 |
| HAM Services Solutions Ltd | Professional & scientific | 2024 |
| HAM Wharf Limited | Construction | 2021 |
| Hambling Marine Limited | Transport & logistics | 2020 |
| Hamd Trading International Ltd | Wholesale & retail | 2023 |
| Hamer Fitness Limited | Other services | 2015 |
| Hami Haciendas Ltd | Real estate | 2023 |
| Hamilton Anaesthesia Ltd | Health & social care | 2026 |
| Hamilton Hastings Ltd | Hospitality | 2020 |
| Hamilton Jarvis Automotive Limited | Wholesale & retail | 2023 |
| Hamilton Jarvis Holdings Ltd | Financial services | 2023 |
| Hamilton Jarvis Prestige Ltd | Manufacturing | 2023 |
| Hamilton Shanghai (UK) Limited | Professional & scientific | 2016 |
| Hamilton Shanghai Limited | Financial services | 2021 |
| Hammer PW Bidco Limited | Financial services | 2023 |
| Hammer PW Topco Limited | Financial services | 2023 |
| Hammond Mechanical Services Limited | Extraterritorial | 2023 |
| Hampton Estates ( NE ) Ltd | Real estate | 2024 |
| Hampton View Media Limited | Professional & scientific | 2018 |
| Hamster Homes Limited | Real estate | 2014 |
| Hamsterley Limited | Professional & scientific | 2018 |
| Hamsterley Pastures Residents Management Company Limited | Households | 2024 |
| Hamza and Brohers Motors Newcastle Ltd | Wholesale & retail | 2026 |
| Hamza Properties Ltd | Real estate | 2018 |
| Hamzah Tandoori Ltd | Hospitality | 2025 |
| HAN Chicken Ltd | Hospitality | 2022 |
| HAN Clyde Ltd | Hospitality | 2021 |
| HAN Companies Ltd | Wholesale & retail | 2018 |
| HAN Perth Ltd | Hospitality | 2021 |
| HAN Residentials Ltd | Hospitality | 2021 |
| HAN Stores Greenock Ltd | Hospitality | 2022 |
| HAN Stores Ltd | Hospitality | 2022 |
| HAN Stores North East Ltd | Hospitality | 2022 |
| Hana Investments Ltd | Real estate | 2024 |
| Hanaizah Properties Ltd | Real estate | 2019 |
| Hanam Luxe Ltd | Wholesale & retail | 2025 |
| Hancone Ltd | Manufacturing | 2025 |
| Hand of Ltd | Education | 2016 |
| Handbag Clinic Ltd | Other services | 2018 |
| Handesh Global Ltd | Wholesale & retail | 2026 |
| Handfcreative Limited | Arts & recreation | 2023 |
| Handpicked Stays Limited | Administrative & support | 2025 |
| Hands & Services Ltd | Health & social care | 2018 |
| Handsome Horses Ltd | Agriculture & fishing | 2020 |
| Handy Andy Car Wash Ponteland Limited | Other services | 2017 |
| Hanford Digital Odontologica Limited | Health & social care | 2023 |
| Hang Sing Hong Manchester Ltd | Wholesale & retail | 2020 |
| Hania Properties Ltd | Real estate | 2025 |
| Hanigroup Ltd | Wholesale & retail | 2023 |
| Haniya Electronics Ltd | Other services | 2022 |
| Hann Consultancy Ltd | Other services | 2021 |
| Hannah Walker Consultancy Ltd | Professional & scientific | 2023 |
| Hanover Point Management Limited | Extraterritorial | 2022 |
| Hanover Social Housing Limited | Real estate | 2022 |
| Hanro Holdings Limited | Financial services | 2023 |
| Hanro Land Limited | Real estate | 2019 |
| Hanro Limited | Professional & scientific | 1988 |
| Hanro Property Holdings Limited | Financial services | 2023 |
| Hanro Property Limited | Real estate | 2023 |
| Hanro Realisations Limited | Other services | 2026 |
| HANS1 Ltd | Information & communication | 2020 |