| Highland Properties (London) Limited | Real estate | 1959 |
| Hilfox Limited | Agriculture & fishing | 2019 |
| Hills L Limited | Real estate | 2023 |
| Hilt Construction Limited | Construction | 2022 |
| Himayat Community CIC | Education | 2026 |
| Hind Street Salon Ltd | Other services | 2022 |
| Hiqain Ltd | Wholesale & retail | 2022 |
| Hire MD Ltd | Real estate | 2025 |
| HKR Leisure Ltd | Information & communication | 2025 |
| HKW777 Ltd | Hospitality | 2024 |
| HLM Properties & Lettings Ltd | Real estate | 2024 |
| Hlpg (Developments) Limited | Construction | 2015 |
| HM Electrical Resources Ltd | Construction | 2026 |
| HM Network Solutions Ltd | Professional & scientific | 2015 |
| Hmel Holdings Ltd | Financial services | 2024 |
| HMO NE Ltd | Hospitality | 2013 |
| Hodgson Architectural Services Limited | Professional & scientific | 2019 |
| Holarbanqs Integrated Services Limited | Construction | 2016 |
| Holarbanqs Logistics Ltd | Wholesale & retail | 2026 |
| Holborn Luxury Ltd | Wholesale & retail | 2024 |
| Holding-Hands (North East) Community Interest Company | Education | 2022 |
| Holistic Technical Solutions Limited | Manufacturing | 2020 |
| Holly Construction Limited | Manufacturing | 1973 |
| Hollygreen Energyfarm Limited | Energy | 2024 |
| Holmes Ashbrooke Limited | Financial services | 2018 |
| Holmeside Amusements Ltd | Professional & scientific | 2014 |
| Holmeside Coffee Limited | Hospitality | 2016 |
| Holmlands Beauty Limited | Other services | 2011 |
| Holsker Limited | Wholesale & retail | 2023 |
| Holt’S Ventilation Ltd | Construction | 2025 |
| Holy Crop Ltd | Professional & scientific | 2025 |
| Home and Cosy NE Ltd | Construction | 2023 |
| Home Improvements SOS Limited | Construction | 2026 |
| Home Interiors Sunderland Limited | Other services | 2015 |
| Home Living (NE) Limited | Wholesale & retail | 2009 |
| Home Voyage Ltd | Real estate | 2022 |
| Home-Made Resources International Limited | Wholesale & retail | 2024 |
| Homefix Letting Limited | Construction | 2026 |
| Homemed Limited | Health & social care | 2025 |
| Homes (NE) Ltd | Real estate | 2020 |
| Homes (NE) Property Management & Letting Ltd | Real estate | 2021 |
| Homes by House Limited | Construction | 2025 |
| Homesoulstoreuk Ltd | Wholesale & retail | 2014 |
| Honest Living Group Ltd | Real estate | 2025 |
| Honest Power Ltd | Energy | 2022 |
| Honest Utility Group Ltd | Professional & scientific | 2021 |
| Hope 4 Kidz | Other services | 2003 |
| Hopeforall CIC | Hospitality | 2022 |
| Horizon Flavour House Ltd | Manufacturing | 2025 |
| Horizon Property Investments NE Ltd | Real estate | 2020 |
| Horizon Vape Distro Ltd | Wholesale & retail | 2017 |
| Horizon Vape Store Ltd | Wholesale & retail | 2020 |
| Horrocks Properties Ltd | Real estate | 2021 |
| Horsebox Photobooth Ltd | Professional & scientific | 2026 |
| Hotpod Yoga Sunderland Ltd | Arts & recreation | 2019 |
| Hotwheel Studio North East Ltd | Wholesale & retail | 2024 |
| House 32 Ltd | Wholesale & retail | 2019 |
| House 32 Trading Ltd | Construction | 2012 |
| House of Cosmetics Limited | Other services | 2019 |
| House of Ents Ltd | Administrative & support | 2026 |
| House of Smash Limited | Hospitality | 2025 |
| House of Smith International Limited | Wholesale & retail | 2021 |
| House of Smith Limited | Real estate | 2022 |
| HOUSE4PROPERTIES Ltd | Real estate | 2024 |
| Housley-Knight & Tampin Ltd | Professional & scientific | 2023 |
| Howard Media Ltd | Administrative & support | 2010 |
| Howard Smith Holdings Ltd | Real estate | 2025 |
| Howard Software Limited | Information & communication | 2011 |
| Howell Studios Ltd | Information & communication | 2025 |
| HPC Consultants Limited | Professional & scientific | 2023 |
| HRL Construction Ltd | Construction | 2026 |
| HS Northeast Property Ltd | Real estate | 2022 |
| HTB Engineering Ltd | Professional & scientific | 2026 |
| HTR Electrical & Data Communications Limited | Construction | 2012 |
| Htuk Services Limited | Wholesale & retail | 2023 |
| Hudson BEN Limited | Professional & scientific | 2015 |
| Hudson Dock Boating and Yachting Community Interest Company | Arts & recreation | 2014 |
| Hughes and Daughters Care Ltd | Health & social care | 2012 |
| Humble Angel Records Limited | Arts & recreation | 2018 |
| Humbledon Fisheries Ltd | Hospitality | 2024 |
| Humbledon Outdoor Activities Association | Health & social care | 1998 |
| Hume Heating Ltd | Construction | 2022 |
| Hunglish Limited | Manufacturing | 2008 |
| Hungry Shack NE Ltd | Hospitality | 2018 |
| Hunter and Turner Properties Ltd | Real estate | 2024 |
| Hunter Motorsport Limited | Wholesale & retail | 2022 |
| Hunters Mobility Services Limited | Extraterritorial | 2009 |
| Huqain Energy Ltd | Other services | 2024 |
| Hurstwood Supplies Ltd | Wholesale & retail | 2025 |
| Hutton Lane Fish Shop Ltd | Hospitality | 2021 |
| HVN Male Beauty Ltd | Other services | 2024 |
| HWT Beauty Ltd | Other services | 2023 |
| HY on Ltd | Wholesale & retail | 2025 |
| Hydx Precision Tubing Ltd | Manufacturing | 2026 |
| Hylton Castle Ltd | Wholesale & retail | 2025 |
| Hylton Castle Trading Limited | Wholesale & retail | 2017 |
| Hylton Castle Trust | Construction | 2017 |
| Hylton Food Limited | Hospitality | 2022 |
| Hylton Food Store Ltd | Wholesale & retail | 2024 |
| Hylton Park Propco Ltd | Real estate | 2025 |