| HJ & R Holdings Limited | Professional & scientific | 2017 |
| Hj&R Properties Limited | Real estate | 2018 |
| HJ13 Promotions Limited | Arts & recreation | 2018 |
| HJC Cleaning Ltd | Administrative & support | 2021 |
| Hjjp Properties Ltd | Real estate | 2025 |
| HK Smile Solutions Ltd | Health & social care | 2024 |
| HKE Newport Ltd | Hospitality | 2016 |
| HL Jones Investments Limited | Financial services | 2025 |
| HLO Aesthetics Ltd | Health & social care | 2021 |
| HLW Properties Limited | Professional & scientific | 1985 |
| HM Jones Investments Limited | Financial services | 2025 |
| HMB Cars Ltd | Administrative & support | 2023 |
| Hmid Properties Ltd | Real estate | 2025 |
| Hmlh Consulting Limited | Health & social care | 2022 |
| HMS Rapid Routes Limited | Transport & logistics | 2025 |
| HN Careers Ltd | Professional & scientific | 2026 |
| HNO (South Wales) Ltd | Real estate | 2022 |
| Hoarlake Properties Ltd | Real estate | 2025 |
| Hodgson Capital Group Limited | Real estate | 2026 |
| Hodgson JAN Services 1979 Limited | Professional & scientific | 2020 |
| Hogback Limited | Wholesale & retail | 2025 |
| Holborn Partnership Limited | Professional & scientific | 2025 |
| Holbrooke Fleet Disposals Ltd | Wholesale & retail | 2022 |
| HOLIC03 Pizza Ltd | Hospitality | 2026 |
| Holiday & Home Park Consultancy Ltd | Professional & scientific | 2023 |
| Holland Ball Estate Ltd | Households | 2024 |
| Holland Project Services Limited | Information & communication | 2015 |
| Hollidge Homes Ltd | Real estate | 2021 |
| Hollier Farms Ltd | Agriculture & fishing | 2003 |
| Hollinbrow Precision Products (UK) Limited | Manufacturing | 2003 |
| Holly Hill Reach Management Company Ltd | Real estate | 2020 |
| Hollys Cleaning Business CYF | Administrative & support | 2025 |
| Holmes Hurst Farms Limited | Agriculture & fishing | 2019 |
| Holy Cheesus Ltd | Hospitality | 2022 |
| Holyrood Wellbeing Collaborative Ltd | Administrative & support | 2025 |
| Home and Kitchen Ally (HKA) Ltd | Wholesale & retail | 2025 |
| Home Brothers Limited | Real estate | 2026 |
| Home Energy Solutions IW Ltd | Construction | 2023 |
| Home Group Holdings Limited | Financial services | 2017 |
| Home Grown Club Limited | Other services | 2012 |
| Home House Collection Limited | Financial services | 2004 |
| Home House Limited | Other services | 1995 |
| Home Key Property Ltd | Construction | 2025 |
| Home VET Visit Ltd | Professional & scientific | 2026 |
| Home-Dine Club Ltd | Wholesale & retail | 2020 |
| Home-Start I.O.W. | Other services | 2006 |
| Homelink Lettings Ltd | Real estate | 2014 |
| Homepage Media Limited | Information & communication | 2002 |
| Homeport Properties Ltd | Real estate | 2019 |
| Homes 1ST Limited | Manufacturing | 2018 |
| Homes 4 U by EPD Limited | Real estate | 2020 |
| Homeshield Insulation Limited | Construction | 2013 |
| Homess Ltd | Real estate | 2022 |
| Homeviewglazing Ltd | Construction | 2026 |
| Homii Technologies Ltd | Information & communication | 2026 |
| Hona Ltd | Wholesale & retail | 2021 |
| Honddu Veterinary Group Limited | Financial services | 2020 |
| Honddu Veterinary Practice Limited | Professional & scientific | 2013 |
| Honey & Vinegar Ltd | Real estate | 2022 |
| Honey Badger Logistics Limited | Administrative & support | 2015 |
| Honey Suckle and Vanilla Ltd | Health & social care | 2021 |
| Honeycomb Landscapes Ltd | Administrative & support | 2025 |
| Hong Kong Express IOW Newport Ltd | Hospitality | 2022 |
| Hong Oriental Therapy Centre Ltd | Health & social care | 2019 |
| Honnington Grange Residents Limited | Real estate | 2005 |
| Hoodwear Ltd | Wholesale & retail | 2021 |
| Hooked on Homes Properties Limited | Real estate | 2019 |
| Hooked UGC Limited | Information & communication | 2025 |
| Hookings Crofts Solicitors Limited | Professional & scientific | 2020 |
| Hook’D & Fried, Food Service Limited | Hospitality | 2025 |
| Hooles Ltd | Transport & logistics | 2025 |
| Hoonigan Ltd | Transport & logistics | 2025 |
| Hope Horizon Group Limited | Administrative & support | 2024 |
| Hope Ministries Cwmbran | Health & social care | 2016 |
| Hopedeals Ltd | Transport & logistics | 2022 |
| Hopkins Cattle Grids Ltd | Manufacturing | 1998 |
| Hopkins Machinery Limited | Administrative & support | 2015 |
| Hopkins Property Ltd | Real estate | 2021 |
| Hopkins Steel Holdings Limited | Financial services | 2021 |
| Horatio Boyd Consultants Ltd | Professional & scientific | 2024 |
| Horizon Aircraft Flight Training Limited | Education | 2015 |
| Horizon Aircraft Services Limited | Manufacturing | 2013 |
| Horizon Conservatories Ltd | Construction | 2025 |
| Horizon Vets Ltd | Professional & scientific | 2023 |
| Horncastle Holdings Limited | Financial services | 2024 |
| Horsebridge Hill Stores Ltd | Wholesale & retail | 2024 |
| Horseneedsplus LP | | 2011 |
| Horseshoe B&B Limited | Hospitality | 2019 |
| Horsley Disbursement Finance Limited | Financial services | 2025 |
| Horsley Holdings Limited | Professional & scientific | 2015 |
| Horsley Wealth Management Limited | Professional & scientific | 2024 |
| Horton's Coffee Limited | Hospitality | 2016 |
| Hosta Meltis Limited | Wholesale & retail | 1990 |
| Hot Kitchen Ltd | Administrative & support | 2019 |
| Hot WAX Studio Ltd | Wholesale & retail | 2023 |
| Hot-Tub Heroes S&D Ltd | Manufacturing | 2025 |
| Hotbox Group Ltd | Hospitality | 2020 |
| Hotel Mike Limited | Information & communication | 2011 |
| Hothouse Improvements Ltd | Construction | 2022 |
| Hotshot Comps Ltd | Wholesale & retail | 2025 |