| Hard Ventures Ltd | Hospitality | 2019 |
| Hardacre Property Investments Limited | Households | 2015 |
| Hardedge Developments Limited | Financial services | 2015 |
| Hardeep Films Entertainment UK Limited | Information & communication | 2021 |
| Hardeep Gill Ltd | Health & social care | 2013 |
| Hardhat Construction Limited | Construction | 2025 |
| Harding Anaesthetic Services Ltd | Health & social care | 2026 |
| Hardings Group Holdings Ltd | Financial services | 2025 |
| Hardipk Property Ltd | Real estate | 2019 |
| Hardman & Company Trading Limited | Households | 2018 |
| Hardtech System Supplies Limited | Wholesale & retail | 2021 |
| Hardteck Limited | Wholesale & retail | 2014 |
| Hardware Heaven Clearance Ltd | Wholesale & retail | 2026 |
| Hardwick Estates 1 Ltd | Real estate | 2020 |
| Hardwick Healthcare Ltd | Health & social care | 2016 |
| Hardwicke House Management Limited | Households | 1986 |
| Hardwood Business Services Limited | Professional & scientific | 2013 |
| Hardy & Nelson Court (Moseley) Management Company Limited | Households | 1994 |
| Hardy Fisher Services Ltd | Professional & scientific | 2019 |
| Hardy Health Safety & Environmental Ltd | Professional & scientific | 2022 |
| Hardy Wilson Limited | Professional & scientific | 2005 |
| Hardy-Johnson Engineering Co. Limited(The) | Professional & scientific | 1944 |
| Hare Craig Wind Farm Holdings 1 Limited | Financial services | 2019 |
| Hare Craig Wind Farm Holdings 2 Limited | Financial services | 2019 |
| Hare Craig Windfarm LLP | | 2019 |
| Hareem GP Services Ltd | Health & social care | 2024 |
| Hareem Medics Ltd | Health & social care | 2024 |
| Hareer UK Ltd | Wholesale & retail | 2011 |
| Harehills Valeting Ltd | Other services | 2025 |
| Harem Trade Limited | Wholesale & retail | 2024 |
| Harewood Estates (Midlands) Limited | Real estate | 2019 |
| Hargeisa Ltd | Transport & logistics | 2019 |
| Harges Limited | Construction | 2025 |
| Hargreave Accountants Ltd | Professional & scientific | 2026 |
| Hari & SON Limited | Real estate | 2024 |
| Hari Acquisition Limited | Information & communication | 2022 |
| Hari Kirpa Limited | Real estate | 2020 |
| Haria Pharma Ltd | Wholesale & retail | 2025 |
| Haridev Properties Limited | Real estate | 2018 |
| Harihara Accountants Ltd | Professional & scientific | 2019 |
| Harihara Advisors & Tax Solutions Ltd | Professional & scientific | 2023 |
| Harihara Mortgages Ltd | Financial services | 2025 |
| Harik Property Management Limited | Professional & scientific | 1997 |
| Haris and Sons Company Ltd | Real estate | 2018 |
| Haris Foods Limited | Wholesale & retail | 2024 |
| Haris Hair Studio Ltd | Other services | 2020 |
| Haris Homes Ltd | Real estate | 2018 |
| Haris Khalid Photography Ltd | Professional & scientific | 2025 |
| Haris Pharma Ltd | Wholesale & retail | 2026 |
| Haris Property Ltd | Real estate | 2024 |
| Haris Shinwari Ltd | Wholesale & retail | 2019 |
| Haris Technician Ltd | Wholesale & retail | 2025 |
| Harith Limited | Health & social care | 2017 |
| Hariz Limited | Real estate | 2015 |
| Harizaj Roofing & Construction Limited | Construction | 2018 |
| Harj Holdings Limited | Real estate | 2021 |
| Harjap Logistics Ltd | Transport & logistics | 2026 |
| Harjit Bansal Ltd | Health & social care | 2022 |
| Harkal Ltd | Wholesale & retail | 2024 |
| Harkin (Holdings) Limited | Other services | 2004 |
| Harkin Developments Ltd | Real estate | 2021 |
| Harkin Group Limited | Real estate | 2005 |
| Harkirit Limited | Construction | 2006 |
| Harky's Cake Limited | Hospitality | 2023 |
| Harl Limited | Manufacturing | 2021 |
| Harlac Limited | Health & social care | 2023 |
| Harlaston Property Maintenance Limited | Construction | 2024 |
| Harleen and Jasleen Limited | Wholesale & retail | 2010 |
| Harlequin Group Limited | Professional & scientific | 1993 |
| Harlequin Implementation Limited | Construction | 2001 |
| Harlequin Limited | Professional & scientific | 2003 |
| Harlescott Properties Limited | Real estate | 2006 |
| Harley Skin Aesthetics Ltd | Health & social care | 2021 |
| Harley Street Laboratory Ltd | Wholesale & retail | 2025 |
| Harley Street Therapist Ltd. | Health & social care | 2014 |
| Harley Ultrasound Limited | Health & social care | 2019 |
| Harlow Construction Ltd | Construction | 2014 |
| Harma Consulting Limited | Information & communication | 2006 |
| Harman Eyecare Limited | Health & social care | 1997 |
| Harman Properties Limited | Real estate | 2014 |
| Harmans Polyurethane Coatings Limited | Manufacturing | 2013 |
| Harmatton Limited | Wholesale & retail | 2016 |
| Harmeen Cuisines Limited | Extraterritorial | 2016 |
| Harmitrader Ltd | Wholesale & retail | 2022 |
| Harmoney Money Transfer Limited | Information & communication | 2025 |
| Harmonia Instruments Ltd | Wholesale & retail | 2026 |
| Harmonie Care Ltd | Health & social care | 2026 |
| Harmonious Improvement Group Limited | Professional & scientific | 2018 |
| Harmonize Limited | Administrative & support | 2023 |
| Harmony 88 Limited | Health & social care | 2015 |
| Harmony Dessert Ltd | Hospitality | 2024 |
| Harmony Elixir Health Haven Ltd | Wholesale & retail | 2024 |
| Harmony Housing Solutions Ltd | Real estate | 2017 |
| Harmony Motors Limited | Wholesale & retail | 2024 |
| Harmony Nexus Hub CIC | Information & communication | 2024 |
| Harmony Orthodontics Ltd | Health & social care | 2019 |
| Harmony Sleep Ltd | Wholesale & retail | 2025 |
| Harmony Support Housing Ltd | Health & social care | 2025 |
| Harmony Talent Solutions Ltd | Administrative & support | 2025 |
| Harmunney Services Ltd | Real estate | 2023 |