| House of Rice Ltd | Hospitality | 2018 |
| House of T&T Ltd | Wholesale & retail | 2026 |
| House of Two Limited | Wholesale & retail | 2014 |
| House of Velinor Ltd | Arts & recreation | 2021 |
| House of Veritas Ltd | Wholesale & retail | 2024 |
| House of Zahra Ltd | Wholesale & retail | 2024 |
| House Signs Ltd | Professional & scientific | 2021 |
| House Signs Shop Ltd | Wholesale & retail | 2024 |
| House Thirty Studio Limited | Manufacturing | 2025 |
| House.London Property Limited | Households | 2019 |
| HOUSE2HOME Renovation Projects Ltd | Construction | 2026 |
| HOUSE90 Limited | Wholesale & retail | 2023 |
| Housedale Limited | Construction | 2016 |
| Housefull Estates Limited | Real estate | 2022 |
| Househatch Ltd | Administrative & support | 2019 |
| Houseofcurlsuk Ltd | Wholesale & retail | 2019 |
| Houseproud Ltd | Real estate | 2019 |
| Houses on High Heels Ltd | Real estate | 2021 |
| Houstons Property Ltd | Real estate | 2019 |
| Houta Consulting Limited | Professional & scientific | 2025 |
| HOV Hub Biomas Limited | Manufacturing | 2025 |
| Hover Square Ltd | Information & communication | 2025 |
| HOW MAY I Assist Ltd | Information & communication | 2023 |
| HOW Refreshing (Kingsley Terrace) Limited | Construction | 2017 |
| HOW Refreshing (New Tredegar) Limited | Construction | 2016 |
| HOW Refreshing (Property Management) Hirwaun Limited | Construction | 2015 |
| HOW Refreshing (Property Management) Winchfawr Limited | Construction | 2015 |
| HOW Refreshing (Salisbury Road) Limited | Construction | 2016 |
| HOW Refreshing (the Bryn) Limited | Construction | 2016 |
| HOW to Vape Escape Ltd | Health & social care | 2025 |
| Howard Court (Cardiff) Ltd | Real estate | 2025 |
| Howard Designs Ltd | Wholesale & retail | 2022 |
| Howard Doolan Associates Limited | Professional & scientific | 1995 |
| Howard Tucker Consultancy Limited | Administrative & support | 2014 |
| Howe and Jones Limited | Construction | 2020 |
| Howe and Jones Properties Limited | Real estate | 2020 |
| Howe Enterprises Ltd | Hospitality | 2020 |
| Howell & Howell Limited | Professional & scientific | 2024 |
| Howell Media CYF | Arts & recreation | 2012 |
| Howell Productions Limited | Information & communication | 2015 |
| Howell Williams Ltd | Financial services | 2016 |
| Howells Legal (Holdings) Limited | Financial services | 2016 |
| Howells Legal (Holdings) Two Limited | Financial services | 2018 |
| Howells Legal Limited | Professional & scientific | 2013 |
| Howemar Limited | Professional & scientific | 2007 |
| Howistart Group Ltd | Wholesale & retail | 2025 |
| Howley Civils (UK) Limited | Construction | 2016 |
| Howling Storm Limited | Construction | 2003 |
| Hoxton Corporate Entertainment Limited | Other services | 2015 |
| Hoylake IT Ltd | Professional & scientific | 2019 |
| Hoyotaathletics Ltd | Wholesale & retail | 2025 |
| Hozannah MAY Property Group Ltd | Real estate | 2025 |
| Hoztlr Ltd | Information & communication | 2024 |
| HP Isangano Ltd | Health & social care | 2016 |
| HP Property Maintenance Ltd | Other services | 2017 |
| HPB Fifty Ltd | Other services | 2013 |
| HPB Leisure Ltd | Hospitality | 2011 |
| Hpgp Trading Ltd | Transport & logistics | 2018 |
| HPL Colt Limited | Information & communication | 2023 |
| HPL DEV Ltd | Information & communication | 2021 |
| Hprop 1 Ltd | Real estate | 2019 |
| HPS Newco Limited | Information & communication | 2016 |
| HQ Chipper Parts Ltd | Manufacturing | 2025 |
| HQ Hair & Beauty Ltd | Wholesale & retail | 2015 |
| HQ Lettings Ltd | Real estate | 2020 |
| HQ Referencing Limited | Real estate | 2017 |
| HQ Restuarant & Bar Limited | Hospitality | 2024 |
| HQ SEO Limited | Professional & scientific | 2017 |
| HR Cosultants Cardiff Ltd | Information & communication | 2025 |
| HR Ecommerce Ltd | Wholesale & retail | 2023 |
| HR Estates Ltd | Construction | 2022 |
| HR Field Services Ltd | Administrative & support | 2025 |
| HR Fractional 1 Ltd | Professional & scientific | 2019 |
| HR Fractional 100 Ltd | Extraterritorial | 2023 |
| HR Fractional 15 Ltd | Extraterritorial | 2023 |
| HR Fractional 16 Ltd | Extraterritorial | 2023 |
| HR Fractional 18 Ltd | Extraterritorial | 2023 |
| HR Fractional 19 Ltd | Extraterritorial | 2023 |
| HR Fractional 2 Ltd | Extraterritorial | 2023 |
| HR Fractional 20 Ltd | Extraterritorial | 2023 |
| HR Fractional 24 Ltd | Extraterritorial | 2023 |
| HR Fractional 25 Ltd | Extraterritorial | 2023 |
| HR Fractional 26 Ltd | Extraterritorial | 2021 |
| HR Fractional 27 Ltd | Extraterritorial | 2023 |
| HR Fractional 28 Ltd | Extraterritorial | 2023 |
| HR Fractional 29 Ltd | Extraterritorial | 2023 |
| HR Fractional 3 Ltd | Extraterritorial | 2023 |
| HR Fractional 31 Ltd | Extraterritorial | 2023 |
| HR Fractional 34 Ltd | Extraterritorial | 2023 |
| HR Fractional 37 Ltd | Extraterritorial | 2023 |
| HR Fractional 38 Ltd | Extraterritorial | 2023 |
| HR Fractional 4 Ltd | Extraterritorial | 2019 |
| HR Fractional 40 Ltd | Extraterritorial | 2021 |
| HR Fractional 42 Ltd | Extraterritorial | 2021 |
| HR Fractional 43 Ltd | Extraterritorial | 2021 |
| HR Fractional 45 Ltd | Extraterritorial | 2021 |
| HR Fractional 46 Ltd | Extraterritorial | 2023 |
| HR Fractional 47 Ltd | Extraterritorial | 2021 |
| HR Fractional 48 Ltd | Extraterritorial | 2021 |
| HR Fractional 49 Ltd | Extraterritorial | 2023 |