| Himal Chitwan Limited | Hospitality | 2023 |
| Himalaya Enterprise Limited | Hospitality | 2025 |
| Himalaya Restaurant EST 1974 Ltd | Hospitality | 2013 |
| Himax Trading Limited | Wholesale & retail | 2014 |
| Himaya Haven Community Interest Company | Health & social care | 2017 |
| Himaya Ltd | Administrative & support | 2015 |
| Himbletons Limited | Construction | 2000 |
| Himbol Shopping Centre Limited | Real estate | 2025 |
| Himjee Holdings Ltd | Financial services | 2025 |
| Himley Care Group Limited | Real estate | 2026 |
| Himount Ltd | Health & social care | 2014 |
| Himu Store Ltd | Wholesale & retail | 2025 |
| Hindi Limited | Hospitality | 2025 |
| Hinen UK Limited | Wholesale & retail | 2024 |
| Hing & Jones Limited | Professional & scientific | 2002 |
| Hingley Psychology Ltd | Education | 2021 |
| Hingmed Ltd | Health & social care | 2025 |
| Hingmed Properties Ltd | Real estate | 2025 |
| Hinkes Hospitality Limited | Hospitality | 2021 |
| Hinslands (Willingdon) Residents Management Company Limited | Households | 2023 |
| Hinson Property Limited | Real estate | 2022 |
| Hint Corp Ltd | Manufacturing | 2025 |
| Hint Holdings Ltd | Manufacturing | 2025 |
| Hintlesham Properties Limited | Real estate | 2021 |
| Hints Builders Ltd | Construction | 2020 |
| Hints Homes Ltd | Construction | 2018 |
| Hinza Enterprises Limited | Wholesale & retail | 2023 |
| HIP and Knee Surgery Limited | Health & social care | 2018 |
| Hipkiss Holdings Limited | Manufacturing | 1996 |
| Hiplets Limited | Real estate | 2014 |
| Hipp Happy Hub Ltd | Hospitality | 2026 |
| Hippasus Solutions Ltd | Health & social care | 2024 |
| Hiptonics Limited | Agriculture & fishing | 2006 |
| Hiptsd (Dartmouth) Limited | Real estate | 2021 |
| Hiptsd (Teignmouth) Limited | Construction | 2021 |
| HIQ Holdings Limited | Financial services | 2020 |
| Hira Hamid Limited | Health & social care | 2024 |
| Hira Investments Birmingham Ltd | Real estate | 2021 |
| Hira Textiles Ltd | Wholesale & retail | 2023 |
| Hirab Property Services Ltd | Real estate | 2026 |
| Hirapro Ltd | Information & communication | 2025 |
| Hire Calibre AI Ltd | Information & communication | 2026 |
| Hire Collect Limited | Administrative & support | 2024 |
| Hire Function Room Ltd | Hospitality | 2026 |
| Hire IT Vehicles Limited | Administrative & support | 2016 |
| Hire Nationwide Limited | Extraterritorial | 2011 |
| Hire OR Sales Enterprises Limited | Transport & logistics | 2007 |
| Hire Portable Office Cabins Limited | Construction | 2024 |
| Hire Resolve UK Limited | Administrative & support | 2021 |
| Hire Solutions Ltd | Administrative & support | 2007 |
| Hire Standard (UK) Limited | Real estate | 1999 |
| Hire Talent Limited | Administrative & support | 2023 |
| Hire Tools & Sales Ltd | Administrative & support | 1997 |
| HIRE4YOU4LESS Ltd | Administrative & support | 2025 |
| Hired Ltd | Transport & logistics | 2022 |
| Hirefleet Limited | Extraterritorial | 2009 |
| Hireflights Media Limited | Administrative & support | 2023 |
| Hireflow Consultants Limited | Administrative & support | 2025 |
| Hiron Ltd | Real estate | 2025 |
| Hiros Haven Limited | Wholesale & retail | 2017 |
| HIS and Hers Brewery Ltd | Manufacturing | 2020 |
| HIS Delight (UK) Ltd | Wholesale & retail | 2020 |
| HIS Property Holdings Ltd | Real estate | 2022 |
| HIS Technicians Ltd | Manufacturing | 2025 |
| Hisaab Consultancy Limited | Professional & scientific | 2020 |
| Hisbah Consultancy LLP | | 2017 |
| Hisbah Energy Consultants Ltd | Administrative & support | 2021 |
| Hisbah LLP | | 2008 |
| Hisbah Support Services Limited | Health & social care | 2023 |
| Hishaam Upholstery Ltd | Wholesale & retail | 2020 |
| Hispania Ashby Ltd | Hospitality | 2023 |
| Hissy Fit Ltd | Wholesale & retail | 2019 |
| History & Heritage Holdings Ltd | Wholesale & retail | 2024 |
| Hita Off-Licence & Grocery Ltd | Wholesale & retail | 2023 |
| Hitachi Energy UK Limited | Manufacturing | 1994 |
| Hitash Ltd | Professional & scientific | 2024 |
| Hitb Logistics Ltd | Transport & logistics | 2023 |
| Hitchen Contracts Limited | Construction | 2024 |
| Hitec Power Protection Limited | Manufacturing | 1995 |
| Hitech Lord Trading Ltd | Wholesale & retail | 2025 |
| Hitide Fishbar Ltd | Hospitality | 2025 |
| Hittel Holdings Limited | Financial services | 2023 |
| Hiva Ltd | Professional & scientific | 2020 |
| Hive 360 Group PLC | Administrative & support | 2017 |
| Hive 360 Support Services Limited | Administrative & support | 2016 |
| Hive Asset Management Ltd | Real estate | 2026 |
| Hive Children's Care Ltd | Health & social care | 2026 |
| Hive Housing (Midlands) Ltd | Real estate | 2020 |
| Hive Logistics Ltd | Transport & logistics | 2023 |
| Hivoo Ltd | Wholesale & retail | 2025 |
| Hiworld Enterprises Ltd | Wholesale & retail | 2026 |
| Hiya Consulting Limited | Information & communication | 2016 |
| Hiyam Bridal Ltd | Wholesale & retail | 2025 |
| Hiyrai Ltd | Information & communication | 2025 |
| HIZ Aesthetics Ltd | Wholesale & retail | 2025 |
| HIZ Energy Limited | Construction | 2024 |
| Hizanaz Ltd | Wholesale & retail | 2024 |
| Hizen Distribution Ltd | Wholesale & retail | 2020 |
| Hizir Group Limited | Wholesale & retail | 2025 |
| Hizoom.Com Limited | Professional & scientific | 2018 |