| Handytax Limited | Professional & scientific | 2015 |
| Hanes 1969 Care Limited | Health & social care | 2018 |
| Hannay Property Services Limited | Construction | 2005 |
| Hannigand Limited | Information & communication | 2018 |
| Hanno Group Limited | Construction | 2019 |
| Hanno Investments Limited | Real estate | 2017 |
| Hans Holdings Management Ltd | Hospitality | 2023 |
| Hanson BID Services Limited | Professional & scientific | 2015 |
| Hants Care Services Ltd | Administrative & support | 2022 |
| Hants Cars Ltd | Transport & logistics | 2025 |
| Hants Petroleum UK Limited | Wholesale & retail | 2011 |
| Hants Technologies Ltd | Information & communication | 2024 |
| HAP Consulting Ltd | Information & communication | 2023 |
| Happy Feet Pet Services Limited | Other services | 2024 |
| Happy Hearts Holdings Ltd | Health & social care | 2026 |
| Happy House Basingstoke Ltd | Hospitality | 2023 |
| Happybeancoffeebar Ltd | Hospitality | 2021 |
| Harber Inns Limited | Hospitality | 2021 |
| Hard Work and Dedication Ltd | Professional & scientific | 2015 |
| Harding Accounting Ltd | Professional & scientific | 2016 |
| Harding Homes Building & Preservation Ltd | Construction | 2024 |
| Harding Rose Architects Limited | Professional & scientific | 2012 |
| Harken Search Ltd | Administrative & support | 2021 |
| Harlem & Archer Ltd | Construction | 2016 |
| Harlequin Clothing Print & Signage Ltd | Manufacturing | 2019 |
| Harley Street Concierge Ltd | Other services | 2012 |
| Harman Oliver Ltd | Administrative & support | 2014 |
| Harmc Comms Ltd | Information & communication | 2021 |
| Harmonic (UK) Ltd | Information & communication | 1997 |
| Harmony Made-To-Measure Furniture Limited | Manufacturing | 2005 |
| Harrison Arboriculture Ltd. | Agriculture & fishing | 2014 |
| Harry French Studio Limited | Professional & scientific | 2023 |
| Hart Property Development Ltd | Real estate | 2019 |
| Hartford Care (10) Limited | Financial services | 2023 |
| Hartford Care (11) Limited | Health & social care | 2024 |
| Hartford Care (12) Limited | Health & social care | 2024 |
| Hartford Care (13) Limited | Financial services | 2025 |
| Hartford Care (14) Limited | Financial services | 2026 |
| Hartford Care (2) Limited | Health & social care | 2010 |
| Hartford Care (3) Limited | Professional & scientific | 2010 |
| Hartford Care (4) Limited | Health & social care | 2014 |
| Hartford Care (5) Limited | Health & social care | 2015 |
| Hartford Care (8) Limited | Health & social care | 2022 |
| Hartford Care (9) Limited | Health & social care | 2022 |
| Hartford Care (South West) Limited | Health & social care | 2007 |
| Hartford Care (Southern) Limited | Health & social care | 2007 |
| Hartford Care Group Limited | Professional & scientific | 2014 |
| Hartford Care Holdco Limited | Professional & scientific | 2024 |
| Hartford Care Limited | Health & social care | 2003 |
| Hartford Care Propco Limited | Professional & scientific | 2024 |
| Hartgill Financial Ltd | Professional & scientific | 2024 |
| Hartley Tanker Services Limited | Water & waste | 2016 |
| Hartley's Kitchen Ltd | Hospitality | 2014 |
| Hartsfield Limited | Information & communication | 2011 |
| Harvey Laison Ltd | Financial services | 2015 |
| Harwell Dosimeters Limited | Manufacturing | 1994 |
| HASS26 Ltd | Professional & scientific | 2018 |
| Hastings Formwork Ltd. | Construction | 2016 |
| Hatch Warren Management Ltd | Households | 2022 |
| Hatch Warren Under Fives Pre-School Limited | Education | 2009 |
| Hathaway Properties Limited | Real estate | 1996 |
| Haugesund Enterprise Limited | Wholesale & retail | 2025 |
| Haus Basingstoke Ltd | Other services | 2025 |
| Haven Spring Children Services Limited | Health & social care | 2026 |
| Haven Summer Children Services Ltd | Health & social care | 2026 |
| HAVEN247 Healthcare Limited | Health & social care | 2018 |
| Hawkhurst House Limited | Health & social care | 2016 |
| Hawkhurst House PAU Limited | Health & social care | 2021 |
| Hawkinge House 2ND Floor Limited | Health & social care | 2021 |
| Hawkinge House Limited | Health & social care | 2010 |
| Hawkinge House PAU Limited | Health & social care | 2020 |
| Hawkins Environmental Limited | Professional & scientific | 2010 |
| Hawkwood Marketing Ltd | Professional & scientific | 2022 |
| Haybros Ltd | Real estate | 2021 |
| Haynes Carpentry Joinery Specialists Limited | Construction | 2014 |
| Haynes TCG Ltd | Wholesale & retail | 2025 |
| Hazeldene House Ltd | Health & social care | 2002 |
| HB Arthouse Ltd | Arts & recreation | 2016 |
| HCR Corporate Trustee Limited | Professional & scientific | 2014 |
| HCR Funding Corporation Limited | Financial services | 1994 |
| HCR Group Limited | Professional & scientific | 2016 |
| HCR Limited | Professional & scientific | 1986 |
| HD Aerospace Limited | Wholesale & retail | 2025 |
| HD Technical Ltd | Energy | 2024 |
| Head Consultancy Limited | Professional & scientific | 2019 |
| Headaway Limited | Real estate | 2015 |
| Headline Hair Limited | Other services | 2021 |
| Heads UP Global Ltd | Information & communication | 2023 |
| Headway Basingstoke | Health & social care | 1996 |
| Health Chambers Limited | Financial services | 2015 |
| Healthcare 21 (UK) Limited | Wholesale & retail | 2004 |
| Healthcare Delivered Exactly Limited | Wholesale & retail | 2017 |
| Healthncare Limited | Health & social care | 2024 |
| Healvia Limited | Wholesale & retail | 2025 |
| Hearson Communications Limited | Professional & scientific | 2011 |
| Heartburn Cancer UK | Health & social care | 2010 |
| Heat Flow UFH Ltd | Construction | 2019 |
| Heath Lake Building Services Ltd | Construction | 2019 |
| Heathmatch Limited | Professional & scientific | 1995 |
| Heatxpert Ltd. | Construction | 2018 |