| Hali Medica Trading Co., Ltd | Extraterritorial | 2019 |
| Halite Limited | Information & communication | 2018 |
| Hallam Engineering Services Ltd | Professional & scientific | 2026 |
| Hallmark Investments Limited | Professional & scientific | 2025 |
| Hallmark Realties Ltd | Real estate | 2024 |
| Halls Contracts Limited | Administrative & support | 2020 |
| Halosnap Limited | Information & communication | 2022 |
| Hamza Shoaib Ltd | Wholesale & retail | 2026 |
| Hangzhou Coditeck Digital Co., Ltd | Manufacturing | 2016 |
| Hangzhou Forewin Pharma Co., Ltd | Extraterritorial | 2011 |
| Hangzhou Lisheng Construction Machinery Parts Co., Ltd | Extraterritorial | 2024 |
| Hangzhou Maturo Machinery Co., Ltd | Extraterritorial | 2021 |
| Hangzhou Safety Technology Ltd | Extraterritorial | 2015 |
| Hangzhou Yichengkai Technology Co., Ltd. | Wholesale & retail | 2025 |
| Hangzhou Yina Import and Export Co., Ltd | Extraterritorial | 2022 |
| Hangzhou Ysoar Intelligent Equipment Co., Ltd | Wholesale & retail | 2022 |
| Hangzhou Zhuoyuan Import and Export Co., Ltd. | Wholesale & retail | 2025 |
| Hankun Import and Export Company Limited | Manufacturing | 2025 |
| Hanlon Lettings (Staffs) Ltd | Real estate | 2020 |
| Hannibal Bars Ltd | Hospitality | 2024 |
| Hanson Projects Ltd | Professional & scientific | 2020 |
| Hanzi Industrial Shanghai Co., Ltd | Extraterritorial | 2011 |
| Haonix Marine Technology Limited | Wholesale & retail | 2024 |
| Haoxin Technology Limited | Wholesale & retail | 2015 |
| Haozhi Trading Co., Ltd | Extraterritorial | 2022 |
| Happy Appi Limited | Households | 2026 |
| Happy Days (Woodseaves) Limited | Transport & logistics | 1971 |
| Happy Henry's! Ltd | Extraterritorial | 2021 |
| Happy International Group Ltd | Wholesale & retail | 2021 |
| Happy Meeting 168 Limited | Hospitality | 2017 |
| Happy Trackin' Magazine Ltd | Information & communication | 2026 |
| Hardcastle O'Sullivan Limited | Real estate | 2025 |
| Hardcore Performance Ltd | Arts & recreation | 2022 |
| Hardiman Holdings Limited | Professional & scientific | 2017 |
| Harding Mews Management Company Limited | Real estate | 2009 |
| Hari OM Medicals Limited | Health & social care | 2011 |
| Harixon Construction & Maintenance Limited | Construction | 2021 |
| Harixon Developments Limited | Real estate | 2015 |
| Harixon Developments Midlands Limited | Real estate | 2017 |
| Harixon Developments Northern Limited | Real estate | 2019 |
| Harixon Developments Southern Limited | Real estate | 2017 |
| Harixon Limited | Construction | 2008 |
| Harixon Property Limited | Real estate | 2015 |
| Harixon Property Midlands Limited | Real estate | 2021 |
| Harle Investments Limited | Administrative & support | 2025 |
| Harlequin Teamwear Limited | Wholesale & retail | 2011 |
| Harlight Solutions Limited | Arts & recreation | 2024 |
| Harmax Refrigerated Storage Limited | Administrative & support | 2022 |
| Harmax Refrigeration Services Ltd | Transport & logistics | 2017 |
| Harmonic Drive Systems Limited | Extraterritorial | 2006 |
| Harmonic Drive UK Limited | Manufacturing | 2004 |
| Harmony and Synergy Limited | Wholesale & retail | 2025 |
| Harmony Prosperity Security Trading Limited | Wholesale & retail | 2025 |
| Harper Hughes Hospitality Limited | Hospitality | 2025 |
| Harringworth Court (Residents) Limited | Households | 1977 |
| Harris & Harris Properties Limited | Real estate | 2018 |
| Harris Driver Services Limited | Transport & logistics | 2025 |
| Harrison Consulting Limited | Real estate | 2023 |
| Harrison Road Services Ltd | Transport & logistics | 2024 |
| Harrowby Limited | Professional & scientific | 2022 |
| Harry Gardner Motorsport Ltd | Wholesale & retail | 2014 |
| Hartwell Joinery Limited | Construction | 2015 |
| Harvard QMS Ltd | Education | 2019 |
| Harvard Solutions Ltd | Education | 2022 |
| Harvey Pro Media Productions Limited | Professional & scientific | 2014 |
| Hatherton Hall Farm Limited | Extraterritorial | 1973 |
| Hatherton Holdings Limited | Financial services | 2015 |
| Hatterhornby Ltd | Wholesale & retail | 2025 |
| Haughton Fresh & Local Ltd | Wholesale & retail | 2017 |
| Haughton Garage Cars Limited | Wholesale & retail | 2003 |
| Haughton Grange Management Limited | Other services | 2009 |
| Haus & Heim Ltd | Real estate | 2025 |
| Haval Accountants Ltd | Professional & scientific | 2024 |
| Havekuesby Ltd | Wholesale & retail | 2025 |
| Havenrise Ltd | Real estate | 2022 |
| Hawk Trustees Limited | Administrative & support | 2022 |
| Hawkes Power Co., Ltd | Extraterritorial | 2020 |
| Hawthorns Property Company Limited | Real estate | 2015 |
| HAY & Sons Limited | Real estate | 2025 |
| HAY House Farm Education Ltd | Education | 2020 |
| Hayer Electrical Ltd | Administrative & support | 2017 |
| Haywood Accounting Solutions Limited | Professional & scientific | 2003 |
| Haywood Automotive Ltd | Professional & scientific | 2012 |
| Haywood Door and Lock Services Limited | Professional & scientific | 2012 |
| Haywood Garage Limited | Wholesale & retail | 2021 |
| Haywood Grove Management Company Limited | Households | 2018 |
| Haywood Oak Properties Ltd | Real estate | 2022 |
| Haywood Planning Services Ltd | Professional & scientific | 2016 |
| Haywood Restoration Limited | Administrative & support | 2011 |
| Haywood Rope Access Limited | Construction | 2015 |
| Haywood Solutions Limited | Professional & scientific | 2013 |
| Hazelbite Limited | Professional & scientific | 2021 |
| Hazzajacks Ltd | Construction | 2025 |
| Hbmtelemarketing Limited | Professional & scientific | 2021 |
| HBP Property Ltd | Real estate | 2023 |
| HBP Technology Limited | Information & communication | 2024 |
| HCF Equestrian Ltd | Arts & recreation | 2021 |
| HD Building & Landscaping Ltd | Construction | 2024 |
| HDL Services Limited | Water & waste | 2015 |
| Headcase Media Limited | Manufacturing | 2014 |