| Hello IT Ltd | Information & communication | 2026 |
| Hello Leads Ltd | Information & communication | 2016 |
| Hello Light Foundation | Other services | 2025 |
| Hello Natural Ltd | Wholesale & retail | 2025 |
| Hello Operator Ltd | Information & communication | 2014 |
| Hello Starling Advertising Agency Limited | Professional & scientific | 2018 |
| Hellooogroup Limited | Information & communication | 2020 |
| Helm AG Ltd | Agriculture & fishing | 2017 |
| Helmsman Investments Ltd | Administrative & support | 2019 |
| Help a Host Ltd | Administrative & support | 2023 |
| Help Debt Plus ( Wales ) Limited | Financial services | 2007 |
| Help Drive Group Ltd | Wholesale & retail | 2021 |
| Help Mental Health CIC | Education | 2023 |
| Help Servicing Ltd | Construction | 2022 |
| Help the Host Limited | Households | 2023 |
| Help With My Move Services Ltd | Transport & logistics | 2019 |
| Helping Hands Houses Ltd | Real estate | 2020 |
| Helping Heroes Cardiff Ltd | Hospitality | 2025 |
| Helping Kids Shine Limited | Health & social care | 2022 |
| Helping OUR Future UK Limited | Public administration | 2019 |
| Helpucymru Community Interest Company | Information & communication | 2024 |
| Helrex Ltd | Wholesale & retail | 2020 |
| Helse-Amitzur Limited | Extraterritorial | 2025 |
| Helter Ltd | Professional & scientific | 2025 |
| HEM Kebab Ltd | Hospitality | 2024 |
| Hemaret Limited | Wholesale & retail | 2020 |
| Hemel Blinds Ltd | Wholesale & retail | 2015 |
| Hemingway London Ltd | Real estate | 2012 |
| Hemisphere Networks Limited | Information & communication | 2015 |
| Hemmer Investments Limited | Real estate | 1987 |
| Hemp Botanics Ltd | Hospitality | 2016 |
| Hemp Manufacturing Corporation Ltd | Wholesale & retail | 2025 |
| Hemp Smile Ltd | Wholesale & retail | 2018 |
| Hempcooltura Ltd | Wholesale & retail | 2018 |
| Hempfire UK Ltd | Public administration | 2026 |
| Hemtex Limited | Administrative & support | 2022 |
| Henby Ltd | Professional & scientific | 2007 |
| Henderson-Kaur Ltd | Administrative & support | 2025 |
| Hendre Asset Limited | Real estate | 2017 |
| Hendre Clochydd Hall Ltd | Hospitality | 2022 |
| Hendre Lakes Developments Limited | Construction | 2019 |
| Hendre Surveying Ltd | Professional & scientific | 2024 |
| Hendredenny Properties Ltd | Real estate | 2019 |
| Hendredenny Woods Limited | Real estate | 2023 |
| Hendricks Builders Limited | Construction | 2019 |
| Hengming International Limited | Professional & scientific | 2007 |
| Hengsheng Consulting Ltd | Information & communication | 2021 |
| Hengshi Limited | Extraterritorial | 2021 |
| Hengxin Limited | Information & communication | 2025 |
| Henke Court RTM Company Limited | Households | 2011 |
| Henke Properties Limited | Real estate | 2016 |
| Henley & Prance Property Services Ltd | Households | 2025 |
| Henley Lettings Limited | Real estate | 2019 |
| Hennan Limited | Hospitality | 2002 |
| Hennessey Capital Investments Limited | Real estate | 2022 |
| Hennessey Construction Consultancy Ltd | Construction | 2020 |
| Hennessey Construction Ltd | Construction | 2011 |
| Hennessey Properties Ltd | Real estate | 2023 |
| Henny Penny Peri Peri Ltd | Hospitality | 2015 |
| Henry & Co Investments Limited | Real estate | 2018 |
| Henry Candler Ltd | Professional & scientific | 2015 |
| Henry Kevil Ltd | Wholesale & retail | 2025 |
| Henry Newbery & Co (Film Productions) Ltd | Information & communication | 2024 |
| Henry Trade Co., Ltd | Manufacturing | 2021 |
| Hensol Veterinary Services Ltd | Professional & scientific | 2022 |
| Hensonshomes Limited | Real estate | 2010 |
| Hensy Group Limited | Extraterritorial | 2019 |
| Hental Properties Limited | Real estate | 2025 |
| Henton Properties (Cardiff) Limited | Real estate | 1963 |
| Henweb Consultants Ltd | Professional & scientific | 2020 |
| Henweb Property Limited | Real estate | 2024 |
| HEO I.T Engineering Ltd | Information & communication | 2025 |
| Heol Gerrig Properties Limited | Construction | 1999 |
| Heol HIR 22-24 Freehold Ltd | Real estate | 2018 |
| Heol Lewis Freehold Land Society Limited | Real estate | 1981 |
| Heol Powis Ltd | Real estate | 2019 |
| Heol-Y-Coed Flat Management Company Limited | Households | 1966 |
| Heol-Y-Nant Property Management Limited | Professional & scientific | 2008 |
| Heoldon Court (Whitchurch) Maintenance Limited | Households | 1964 |
| Heor Holdings Limited | Administrative & support | 2018 |
| Hepa Ltd | Information & communication | 2026 |
| Hephaestus Goldworks Ltd | Information & communication | 2020 |
| Hephzibah Surface Design Ltd | Construction | 2024 |
| Hepp Innovate Ltd | Professional & scientific | 2020 |
| Hepp Live Ltd | Information & communication | 2020 |
| Heppell NDT Services Limited | Professional & scientific | 2015 |
| HER Nellieb Boutique Limited | Wholesale & retail | 2025 |
| HER Web Impact CIC | Information & communication | 2025 |
| Hera SZ Ltd | Information & communication | 2026 |
| Hera VPN Ltd | Information & communication | 2025 |
| Heracles International Limited | Wholesale & retail | 2022 |
| Heravitality Ltd | Wholesale & retail | 2024 |
| Herbal World Limited | Wholesale & retail | 2025 |
| Herbalist Massive Ltd | Wholesale & retail | 2018 |
| Herbclever Limited | Wholesale & retail | 2025 |
| Herbelle Ltd | Wholesale & retail | 2026 |
| Herbert Investments Limited | Real estate | 2007 |
| Herbert.R.Thomas Renewables Limited | Water & waste | 2013 |
| Herbertco Limited | Administrative & support | 2019 |
| Herbfx Ltd | Wholesale & retail | 2020 |