| Herd Property Investments Limited | Real estate | 2019 |
| Heritage Adventure Golf Ltd | Arts & recreation | 2025 |
| Heritage Insights Limited | Real estate | 2024 |
| Heritage Mills Limited | Extraterritorial | 1964 |
| Hermolle Associates Limited | Professional & scientific | 1993 |
| Herne Hill Lodge Limited | Extraterritorial | 1987 |
| Heron Props Ltd | Wholesale & retail | 2025 |
| Herons Reach Management (Arnside) Limited | Households | 1996 |
| Herons Reach Management Company (Blackpool) Limited | Households | 1992 |
| Hertzlink Industries UK Ltd | Manufacturing | 2024 |
| Hesed- Golden Groups Limited | Hospitality | 2024 |
| Hesford Properties Ltd | Real estate | 2019 |
| Hesketh Avenue 1962 Limited | Extraterritorial | 2014 |
| Hesketh Land Management Co. Limited | Construction | 2008 |
| Hesketh Maisonettes Limited | Other services | 1970 |
| Hewitt Bros Construction Ltd | Construction | 2025 |
| Hexameter Services Limited | Professional & scientific | 2016 |
| Heya Outreach Limited | Professional & scientific | 2025 |
| Heysleigh Management Company Limited | Households | 2012 |
| Heytree Motors Limited | Wholesale & retail | 2026 |
| Heyworth Consultancy Services Limited | Professional & scientific | 1996 |
| Heyworth Homes Ltd | Real estate | 2024 |
| Hgaf Living Limited | Extraterritorial | 2021 |
| Hgaf Properties Limited | Professional & scientific | 2016 |
| HGR Home Interiors Ltd | Wholesale & retail | 2022 |
| HH Joinery Ltd | Construction | 2026 |
| HH Sales Ltd | Wholesale & retail | 2026 |
| Hh.Unicorn Store Ltd | Wholesale & retail | 2025 |
| HHB Northwest Ltd | Construction | 2017 |
| Hi-Line Holdings Ltd | Financial services | 2020 |
| Hi-Line Transport Limited | Transport & logistics | 1987 |
| Hi-Tech Security Systems Ltd | Manufacturing | 2018 |
| Hibell Consultancy Ltd | Information & communication | 2021 |
| Hidden Corner Campsite Limited | Hospitality | 2026 |
| Hidden GEM Photography Studio Ltd | Professional & scientific | 2019 |
| Hidden Gems Properties Limited | Real estate | 2022 |
| High Alpha Ltd | Arts & recreation | 2018 |
| High Bright Media Ltd | Professional & scientific | 2018 |
| High Class Hounds Limited | Other services | 2017 |
| High G Bulldog Limited | Administrative & support | 2018 |
| High G Engineering Limited | Manufacturing | 2013 |
| High Gaze Group Ltd | Other services | 2024 |
| High Jinx Entertainments Limited | Arts & recreation | 2013 |
| High Legh (Fairhaven) Maintenance Company Limited | Households | 1978 |
| High Level Specialists Ltd | Administrative & support | 2015 |
| High Tech Flooring Services Limited | Construction | 2013 |
| High Times Rope Acces Ltd | Administrative & support | 2022 |
| Highams Accountants Ltd | Professional & scientific | 2022 |
| Highfield Hall (Barrows Green) Management Company Limited | Households | 2003 |
| Highfield Kitchens Limited | Wholesale & retail | 2016 |
| Highfield Park Residents' Association Limited | Real estate | 1974 |
| Highfield Stores Ltd | Wholesale & retail | 2023 |
| Highfield Tree Care Ltd | Administrative & support | 2016 |
| Highgrove Bankfield Management Co. Ltd | Households | 2011 |
| Highgrove Footwear Limited | Manufacturing | 1994 |
| Highland Lodge (Standish) Management Limited | Households | 1995 |
| Highland Roadbrush Ltd | Water & waste | 2018 |
| Highton Camm Ltd | Wholesale & retail | 2025 |
| Highway 79 Limited | Information & communication | 2017 |
| Hilal Dogukan Ltd | Hospitality | 2026 |
| Hilian Ltd | Professional & scientific | 2011 |
| Hill Construction Group Ltd | Construction | 2020 |
| Hill Tarmacadam Limited | Extraterritorial | 2014 |
| Hillcrest Promotions Ltd | Real estate | 2018 |
| Hilo Digital Ltd | Information & communication | 2018 |
| Hilo Space Ltd | Real estate | 2021 |
| Hilon Limited | Administrative & support | 2005 |
| Himo Ltd | Professional & scientific | 2023 |
| Himpeks Global Limited | Extraterritorial | 2025 |
| Hirst and Associates Limited | Health & social care | 2020 |
| HIS Provision CIC | Hospitality | 2013 |
| Hive 42 Ltd | Information & communication | 2019 |
| Hive Holdco Limited | Financial services | 2024 |
| Hive Urban Farm Shops Ltd | Wholesale & retail | 2020 |
| HJB Investments Ltd | Real estate | 2024 |
| HL Systems Ltd | Information & communication | 2020 |
| HLS Cleaning Ltd | Administrative & support | 2020 |
| HM Entertainment Ltd | Arts & recreation | 2025 |
| HMC Fylde Properties Limited | Real estate | 2026 |
| HNH Group Ltd | Financial services | 2010 |
| HO Holding Ltd | Financial services | 2025 |
| Hobart & Heron Ltd | Wholesale & retail | 2025 |
| Hockaday-Moore Surfacing Limited | Construction | 1998 |
| Hodder Consultative Limited | Professional & scientific | 2025 |
| Hodgson Academy Uniform Shop Ltd | Wholesale & retail | 2004 |
| Hofuf Holdings Ltd | Financial services | 2021 |
| Holdcable Limited | Administrative & support | 2007 |
| Holden & LEE (Holdings) Ltd | Professional & scientific | 2025 |
| Holden & LEE Ltd | Professional & scientific | 2025 |
| Holden Access Solutions Limited | Health & social care | 2017 |
| Holden Projects Ltd | Construction | 2026 |
| Holders Sheet Metal Limited | Manufacturing | 2004 |
| Hole Masters Holdings 2022 Limited | Financial services | 2022 |
| Holemasters Demtech Limited | Construction | 1996 |
| Holemasters Holdings Limited | Professional & scientific | 2015 |
| Holemasters Limited | Administrative & support | 2004 |
| Holiday Home Services Ltd | Hospitality | 2022 |
| Holiday Travel Shop Limited | Administrative & support | 2024 |
| Holistic Santé Limited | Public administration | 2024 |
| Holistic Training Academy Ltd | Education | 2023 |