| Homeglow Competitions Ltd | Information & communication | 2026 |
| Homeland Florists Limited | Agriculture & fishing | 2009 |
| Homeland Transport Ltd | Transport & logistics | 2021 |
| Homelets &Co Northampton Ltd | Construction | 2015 |
| Homemade by Victoria Limited | Hospitality | 2024 |
| Homepack Limited | Wholesale & retail | 2000 |
| Homepipe Ltd | Construction | 2014 |
| Homerz Limited | Wholesale & retail | 2021 |
| Homes Design Limited | Construction | 2007 |
| Homeshield Support Ltd | Administrative & support | 2016 |
| Homestyle Windows Ltd | Construction | 2016 |
| Hometech-Uk Limited | Other services | 2001 |
| Hometech-Uk Northampton Limited | Other services | 2026 |
| Homewood Project Management Ltd | Professional & scientific | 2018 |
| Homez to LET Ltd | Real estate | 2023 |
| Honest Logistics Ltd | Transport & logistics | 2026 |
| Honey & Caramel Ltd | Other services | 2024 |
| Honeybeerecruitment.Com Ltd | Administrative & support | 2007 |
| Honeybode Properties Ltd | Real estate | 2025 |
| Honeycomb Lodges Ltd | Wholesale & retail | 2024 |
| Honeyfields 732 Ltd | Professional & scientific | 2022 |
| Honeygift Limited | Wholesale & retail | 2020 |
| Honeymart Ltd | Wholesale & retail | 2024 |
| Honeysuckle and Castle Limited | Hospitality | 2017 |
| Honeywell Bakes Ltd | Manufacturing | 2018 |
| Hongkongers Project UK Limited | Construction | 2026 |
| Honhub Ltd | Professional & scientific | 2025 |
| Hooden Ltd | Transport & logistics | 2021 |
| Hook & Hatton Limited | Other services | 1985 |
| Hook & Hook Ltd | Wholesale & retail | 2023 |
| Hooley Brown Ltd | Professional & scientific | 2019 |
| Hope & Pride Limited | Information & communication | 2019 |
| Hope Collective CIC | Professional & scientific | 2022 |
| Hope Enterprises (Northampton) Community Interest Company | Health & social care | 2011 |
| Hope for Future Care Ltd | Health & social care | 2023 |
| Hope for Health Solutions Ltd | Wholesale & retail | 2017 |
| Hopebridge Limited | Health & social care | 2025 |
| Hopelay Partners LLP | | 2023 |
| Hopfields Medical Aesthetics Ltd | Health & social care | 2021 |
| Hopi Property Services Limited | Extraterritorial | 2023 |
| Hopkinson Transport (Chesterfield) Limited | Extraterritorial | 1987 |
| Horace Batten (Bootmaker) Limited | Manufacturing | 1999 |
| Horga Limited | Real estate | 2016 |
| Horiba Jobin Yvon IBH Ltd | Manufacturing | 1977 |
| Horiba UK Finance Limited | Financial services | 2016 |
| Horiba UK Limited | Manufacturing | 1988 |
| Horizon Agencies Limited | Wholesale & retail | 2014 |
| Horizon House Investments Ltd | Financial services | 2024 |
| Hornbeam Vehicle Services Ltd | Wholesale & retail | 2024 |
| Hornstone Ltd | Professional & scientific | 2025 |
| Horsepower Hangar Limited | Wholesale & retail | 2017 |
| Horspool Wealth Management Limited | Financial services | 2016 |
| Horts Estate Agency Limited | Real estate | 1996 |
| Hospital Aids Limited | Wholesale & retail | 2007 |
| Hospitality & Leisure Sales Solutions UK Limited | Professional & scientific | 2023 |
| Hospitality and Leisure Tech Solutions Limited | Administrative & support | 2023 |
| Hospitality Mentor Solutions Ltd | Professional & scientific | 2024 |
| Hot Button Productions Limited | Information & communication | 2013 |
| Hot City Media Ltd | Arts & recreation | 2017 |
| Hot Snapper Ltd | Information & communication | 2013 |
| Hot Squares Limited | Information & communication | 2022 |
| Hotbox Design Ltd | Manufacturing | 2012 |
| Hotbox Properties Ltd | Real estate | 2021 |
| Hotdog Creative Ltd | Professional & scientific | 2024 |
| Hotel Aesthetics Ltd | Other services | 2023 |
| Hotel Gastro Ltd | Other services | 2015 |
| HOTELS4BUSINESS Ltd | Administrative & support | 2020 |
| Hotice Accounting Ltd | Professional & scientific | 2019 |
| Hotline Heating Services Limited | Manufacturing | 1996 |
| Hotman Support Consultants Limited | Professional & scientific | 2014 |
| Hotpod Yoga Daventry Ltd | Arts & recreation | 2022 |
| Hotspur Leaf Ltd | Wholesale & retail | 2021 |
| Hottcourt Limited | Professional & scientific | 2022 |
| Houghton & Valentine Homes Ltd | Real estate | 2023 |
| Houghton Hams Limited | Manufacturing | 1994 |
| Houghton Meadow Limited | Real estate | 2025 |
| Hounslow Consortium Limited | Health & social care | 2017 |
| Hour Glass Consulting Limited | Professional & scientific | 2014 |
| Hour Studio Limited | Administrative & support | 2021 |
| Hours Security Ltd | Administrative & support | 2017 |
| House MD Limited | Real estate | 2025 |
| House of Amarah Group Ltd | Wholesale & retail | 2026 |
| House of Artisan Bakery Ltd | Hospitality | 2026 |
| House of Beauty Holdings Ltd | Financial services | 2021 |
| House of Beauty HQ Limited | Other services | 2021 |
| House of Beets Ltd | Hospitality | 2020 |
| House of Binky Ltd | Wholesale & retail | 2022 |
| House of Britannia Limited | Wholesale & retail | 2023 |
| House of Canine Ltd | Professional & scientific | 2014 |
| House of Dahlia Ltd | Wholesale & retail | 2021 |
| House of Hygge Ltd | Wholesale & retail | 2025 |
| House of Jetty Limited | Professional & scientific | 2018 |
| House of Light Ltd | Hospitality | 2026 |
| House of Technologies Ltd | Information & communication | 2020 |
| House to Home Properties Limited | Construction | 2011 |
| Householder Investments Limited | Real estate | 2017 |
| HOUSEJUNGLE07 Ltd | Wholesale & retail | 2025 |
| Housing Futures Limited | Professional & scientific | 2004 |
| Hove-To Ltd | Real estate | 2016 |
| Hoverstone Limited | Wholesale & retail | 2007 |