| Hellens Investments (Silverlink) LLP | | 2016 |
| Hellens Investments (Teal Farm Park) LLP | | 2008 |
| Hellens Investments (Washington) LLP | | 2008 |
| Hellens Land Limited | Construction | 2014 |
| Hellens Plant Limited | Extraterritorial | 2003 |
| Hellens Residential Limited | Real estate | 2012 |
| Hellens Retail (Spennymoor) Limited | Real estate | 2017 |
| Hellings Family Partnership LLP | | 2023 |
| Hellings Properties Ltd | Real estate | 2023 |
| Helmanis & Howell Limited | Construction | 1986 |
| Hembury Properties Ltd | Real estate | 2024 |
| Hepworth Landscaping Limited | Construction | 2025 |
| Here/Now/Today Ltd | Education | 2026 |
| Herman Family Holdings Ltd | Real estate | 2021 |
| Heron Services Ltd | Professional & scientific | 2022 |
| High Spen Holdings Limited | Real estate | 2025 |
| Highwaves Ltd | Health & social care | 2022 |
| Hikmit Ltd | Hospitality | 2023 |
| Hillstone Property Holdings Ltd | Real estate | 2025 |
| Hind Co 1 Limited | Manufacturing | 2004 |
| Hindle Investments Limited | Real estate | 2018 |
| Hindle Property Developments Limited | Real estate | 2020 |
| Hirebright Recruitment Limited | Administrative & support | 2023 |
| HJ Properties NE Ltd | Real estate | 2024 |
| Hjbb Services Ltd | Real estate | 2023 |
| HJD Enterprises Ltd | Hospitality | 2020 |
| Hlukose Ltd | Wholesale & retail | 2023 |
| HMB Accountants Limited | Professional & scientific | 2013 |
| Hmcmillan and Jskeens WP Ltd | Administrative & support | 2024 |
| HMG Removals Ltd | Transport & logistics | 2025 |
| Hmrg Capital LLP | | 2017 |
| Hoby Estates LLP | | 2021 |
| Hodder Place Holdings Ltd | Real estate | 2022 |
| Hodder Place Partnership LLP | | 2022 |
| Hodge Wealth Management Ltd | Financial services | 2015 |
| Hogg Motors NE Limited | Wholesale & retail | 2025 |
| Holness Partnership LLP | | 2018 |
| Holrock Escapes Ltd | Real estate | 2022 |
| Holrock Homes Ltd | Real estate | 2021 |
| Holrock Ltd | Financial services | 2025 |
| Holway Ltd | Real estate | 2021 |
| Home Hub Info Ltd | Information & communication | 2024 |
| Homemaster Building Contractors Limited | Construction | 2002 |
| Honeybee Distribution Limited | Wholesale & retail | 2012 |
| Honeymoon 88 Ltd | Other services | 2024 |
| Hooker Family Holdings Ltd | Real estate | 2018 |
| Hooker Family Partnership LLP | | 2018 |
| Hope Street Caravan and Motorhome Leisure Limited | Wholesale & retail | 2024 |
| Horizon Advisory Services Ltd | Professional & scientific | 2025 |
| Horton Family Holdings Ltd | Real estate | 2017 |
| Horton Family Partnership LLP | | 2017 |
| Horus Medical Services Ltd | Health & social care | 2026 |
| Hotham Park Cafe Ltd | Hospitality | 2014 |
| House of Hair Hartlepool Ltd | Other services | 2026 |
| House of Instinct LLP | | 2019 |
| House of Mystic LLP | | 2019 |
| House of Obebe Investments Limited | Real estate | 2022 |
| House of Serendipity Ltd | Wholesale & retail | 2024 |
| House of Valor LLP | | 2019 |
| HPY Energy Developments Ltd | Professional & scientific | 2023 |
| HQ Accounting Solutions Ltd | Professional & scientific | 2018 |
| HR North East Limited | Professional & scientific | 2013 |
| HRS Engines Limited | Manufacturing | 2013 |
| HS & GK Property Limited | Real estate | 2021 |
| HSB Property Group Ltd | Real estate | 2022 |
| Htfd Ltd | Real estate | 2020 |
| Hudson & Hale Ltd | Administrative & support | 2017 |
| Hugo BEA Ltd | Professional & scientific | 2022 |
| Humble Construction Services Ltd | Construction | 2017 |
| Hunt Consult Ltd. | Administrative & support | 2011 |
| Huska Design Studio Limited | Wholesale & retail | 2012 |
| Hutton Estates Limited | Hospitality | 2008 |
| Hydara Rental Homes Ltd | Households | 2026 |
| Hydratrak Ltd | Extraterritorial | 2024 |
| I & K Richardson Properties Limited | Real estate | 2015 |
| I & N Ross WP Ltd | Administrative & support | 2024 |
| I D&B Ltd | Construction | 2014 |
| I&R Ranasinghe WP Ltd | Professional & scientific | 2024 |
| Iafts Limited | Education | 2023 |
| IAM Family Limited | Financial services | 2022 |
| IAM Group Holdings Limited | Financial services | 2022 |
| IC Containers Ltd | Wholesale & retail | 2024 |
| ICF Future Build Ltd | Construction | 2025 |
| ICS Integrated Cable Services Limited | Construction | 2000 |
| ID Project Control Services Limited | Professional & scientific | 2014 |
| Identity Dancewear Ltd | Wholesale & retail | 2025 |
| IG EHS Ltd | Construction | 2026 |
| Igcc Management Ltd | Real estate | 2017 |
| Iguanamed Limited | Wholesale & retail | 2020 |
| IJ Sanderson Contracting Ltd | Professional & scientific | 2023 |
| IJR Safety Services Ltd | Professional & scientific | 2023 |
| Ikon Hairdressing Limited | Other services | 2012 |
| Ikso Properties Ltd | Real estate | 2021 |
| Ikso Property Partnership LLP | | 2021 |
| Ilcigno Pizzeria Limited | Hospitality | 2022 |
| Iloko Family Holdings Ltd | Real estate | 2019 |
| Iloko Family Partnership LLP | | 2019 |
| Ilyria Holdings Ltd | Real estate | 2022 |
| Ilyria Partnership LLP | | 2022 |
| Image Instructor Ltd | Education | 2020 |