| Haal Media Limited | Professional & scientific | 2009 |
| Haans Investments Ltd | Other services | 2022 |
| Haap Solutions PVT Ltd | Information & communication | 2026 |
| Haase & Co. Consulting Group Ltd | Professional & scientific | 2024 |
| Habberpharm Holdings Limited | Real estate | 2020 |
| Habergham Holdings Limited | Other services | 2023 |
| Habermas Limited | Extraterritorial | 2012 |
| Habeshana Hire Ltd | Administrative & support | 2025 |
| Habfi Ltd. | Information & communication | 2016 |
| Habib & Saleem Group Limited | Hospitality | 2019 |
| Habib Luxury Limited | Manufacturing | 2024 |
| Habib Perfume Limited | Manufacturing | 2024 |
| Habibi Chocolat Ltd | Manufacturing | 2025 |
| Habibi Consulting Ltd | Construction | 2025 |
| Habibi Investments Ltd | Real estate | 2021 |
| Habico Limited | Wholesale & retail | 1993 |
| Habit Picture Frames UK Ltd | Wholesale & retail | 2026 |
| Habitat East Limited | Construction | 2025 |
| Habitat Ltd | Real estate | 2016 |
| Habitat Prop Developments Ltd | Real estate | 2017 |
| Habitat Resolution LLP | | 2006 |
| Habitat Sales and Lettings Limited | Real estate | 2012 |
| Habitation Property (Cross Gates) Limited | Real estate | 2026 |
| Habito Limited | Real estate | 2008 |
| Habito Property Investments Ltd | Real estate | 2025 |
| Habito Property Services Limited | Real estate | 2012 |
| Habits Industries Ltd | Hospitality | 2025 |
| Hacien Ltd | Other services | 2019 |
| Hackett Accountants Ltd | Professional & scientific | 2019 |
| Hackett Construction Ltd | Construction | 2021 |
| Hackney Jointing Limited | Administrative & support | 2016 |
| Hadco (Leeds) Limited | Wholesale & retail | 2003 |
| Haddington Warehouse Processes Limited | Professional & scientific | 2026 |
| Hadelinandzavelya Ltd | Other services | 2021 |
| Hadi Care Ltd | Administrative & support | 2017 |
| Hadi Fast Foods Ltd | Hospitality | 2025 |
| Hadi Legal Ltd | Professional & scientific | 2018 |
| Hadi Training Ltd | Education | 2021 |
| Hadicare Kirklees Limited | Health & social care | 2026 |
| Hadleigh Court (Maintenance) Limited | Households | 1982 |
| Hadley Marriot Ltd | Financial services | 2021 |
| Hadrian Cracknell Properties Ltd | Real estate | 2019 |
| Hadrian Homes NE Limited | Construction | 2022 |
| Hadrian Regen AG Co Ltd | Financial services | 2021 |
| Hadron Studio Limited | Information & communication | 2026 |
| Haek Investments Ltd | Real estate | 2026 |
| Haemocell Limited | Manufacturing | 2007 |
| Haemoconcepts Limited | Manufacturing | 2015 |
| Hafeez Properties Limited | Real estate | 2024 |
| Haffejee Ltd | Professional & scientific | 2025 |
| Hafla Presents Ltd | Real estate | 2025 |
| Haftsin Cafe Ltd | Hospitality | 2025 |
| Haftsin Restaurant Ltd | Administrative & support | 2017 |
| Haftsin Rising Sun Ltd | Real estate | 2020 |
| Hagc Limited | Health & social care | 2016 |
| Hagen Wolf Limited | Professional & scientific | 2017 |
| Hagg Lane Farm Ltd | Financial services | 2022 |
| Haggai Cyber Security Consultancy Ltd | Information & communication | 2021 |
| Haggerty Jaques Limited | Administrative & support | 2018 |
| Hagi Speed Transport Limited | Transport & logistics | 2025 |
| Hagry Group Limited | Wholesale & retail | 2020 |
| Hags Consultancy Services Limited | Information & communication | 2016 |
| Haha Ventures Limited | Real estate | 2019 |
| Hahamed Contracting Ltd | Information & communication | 2023 |
| HAI Estates Ltd | Real estate | 2025 |
| Haidari.Market Ltd | Wholesale & retail | 2025 |
| Haider Seikh Limited | Hospitality | 2026 |
| Haiderali Properties Ltd | Real estate | 2023 |
| Haidurqureshi Ltd | Information & communication | 2025 |
| Haigh & Smith Developments Ltd | Construction | 2025 |
| Haigh Care Limited | Health & social care | 2020 |
| Haigh Hoofcare Ltd | Agriculture & fishing | 2023 |
| Haigh Moor Developments Ltd | Construction | 2022 |
| Haighs Waste Management Ltd | Water & waste | 2025 |
| Haighwood Agency (MLY) Limited | Financial services | 2021 |
| Haighwood Financial Services Limited | Professional & scientific | 2019 |
| Haighwood Holdings Limited | Financial services | 2019 |
| Haighwood Ltd | Financial services | 2014 |
| Hailings Limited | Real estate | 1984 |
| Hain Celestial (C & S) Limited | Professional & scientific | 2012 |
| Hain Celestial UK Limited | Manufacturing | 2012 |
| Hain Foods Limited | Manufacturing | 2006 |
| Hain Frozen Foods UK Limited | Manufacturing | 2006 |
| Hains & Lund Recoveries Limited | Administrative & support | 2015 |
| Hainsworth Communications Ltd | Information & communication | 2016 |
| Hair @ Gildas Ltd | Other services | 2018 |
| Hair Associates Limited | Other services | 2011 |
| Hair Beauty by PW Ltd | Other services | 2025 |
| Hair Burst Limited | Health & social care | 2014 |
| Hair by Amber Jade Ltd | Other services | 2026 |
| Hair by Jason Lloyd Limited | Other services | 2023 |
| Hair by JO Ltd | Other services | 2019 |
| Hair by NIC J H Ltd | Other services | 2023 |
| Hair by Rhonda Ltd | Wholesale & retail | 2020 |
| Hair by ZAK Limited | Other services | 2013 |
| Hair Crew @ Limited | Other services | 2015 |
| Hair Extensions by Morgan Ltd | Other services | 2026 |
| Hair Restoration Services Limited | Health & social care | 2025 |
| Hair Studio 77 Ltd | Other services | 2022 |
| HAIR4HEAD Ltd | Professional & scientific | 2025 |