| HER Cakes Ltd | Manufacturing | 2021 |
| Hera Building Ltd | Construction | 2025 |
| Hera's Cakes Limited | Manufacturing | 2019 |
| Herac (Help Educate & Raise Awareness Around Cancer) CIC | Health & social care | 2023 |
| Herb Carpentry Ltd | Manufacturing | 2021 |
| Hercules HR Limited | Financial services | 2019 |
| Here Hospitality Ltd | Hospitality | 2022 |
| Here Spaces & Events Ltd | Real estate | 2019 |
| HERE2TOW Ltd | Transport & logistics | 2025 |
| Hereford Self Store Limited | Administrative & support | 2013 |
| Hereford Tyres Limited | Wholesale & retail | 2004 |
| Heres Legal Ltd | Professional & scientific | 2023 |
| Herga Property Management Ltd | Real estate | 2025 |
| Heriloom Ltd | Wholesale & retail | 2026 |
| Heriots Bakehouse Ltd | Wholesale & retail | 2025 |
| Heriots Collective Ltd | Wholesale & retail | 2025 |
| Heriots Creations Ltd | Wholesale & retail | 2025 |
| Heriots Food Limited | Wholesale & retail | 2025 |
| Heriots Online Limited | Wholesale & retail | 2021 |
| Herish Maintenance Limited | Construction | 2025 |
| Heritage Bengal Global UK Chapter Limited | Education | 2021 |
| Heritage Care Ltd | Health & social care | 2020 |
| Heritage Companions Ltd | Health & social care | 2026 |
| Heritage Garden Supplies Limited | Administrative & support | 2009 |
| Heritage Gems Ltd | Wholesale & retail | 2012 |
| Heritage Homes London Limited | Real estate | 2025 |
| Heritage London (UK) Developments Limited | Real estate | 2022 |
| Heritage Musical Group Ltd | Arts & recreation | 2023 |
| Heritage Shipping UK Limited | Real estate | 2019 |
| Heritage UK Properties Ltd | Real estate | 2024 |
| Heritage Weddings Limited | Hospitality | 2025 |
| Herma Foodies Ltd | Hospitality | 2023 |
| Herman Claude Ltd | Health & social care | 2007 |
| Herman Construction Limited | Construction | 2014 |
| Herman Kunz Limited | Professional & scientific | 2019 |
| Hermes Transfers Ltd | Transport & logistics | 2022 |
| Herne Hill and Dulwich Violin Studio Limited | Education | 2025 |
| Heroic Originals Grayshott Road Limited | Real estate | 2024 |
| Heroic Originals Limited | Real estate | 2013 |
| Heroic Properties Limited | Real estate | 1987 |
| Herrick Consulting Limited | Professional & scientific | 2021 |
| Hershey Consultancy Limited | Information & communication | 2022 |
| Hertfordshire Sunbed Hire Ltd | Administrative & support | 2015 |
| Herts Waste Limited | Construction | 2016 |
| Heselhaye Ltd | Hospitality | 2019 |
| Hesper Properties Limited | Real estate | 2016 |
| Hestia Homes Ltd | Real estate | 2022 |
| Heston London Limited | Wholesale & retail | 2013 |
| HET Technologies Limited | Information & communication | 2023 |
| Hetkim Export Limited | Wholesale & retail | 2026 |
| Hewitson Heating & Utility Services Ltd | Construction | 2021 |
| HEX IT Solutions Ltd | Wholesale & retail | 2025 |
| HEX Wholesale Ltd | Wholesale & retail | 2025 |
| Hexa Consultancy Services Ltd | Information & communication | 2020 |
| Hexaform Construction Limited | Construction | 2020 |
| Hexagon Framework Ltd | Construction | 2025 |
| Hexagon Rise Ltd | Hospitality | 2026 |
| Hexagon Stream Ltd | Hospitality | 2026 |
| Hexagon Ventures Holding Ltd | Hospitality | 2026 |
| Hexarad Group Limited | Health & social care | 2016 |
| Hexham Gardens UB5 Management Limited | Households | 2016 |
| HEY Exhibitions Limited | Administrative & support | 2018 |
| HEY Harrie Limited | Professional & scientific | 2021 |
| HEY PAL Marketing Ltd. | Professional & scientific | 2023 |
| Heygreev Ltd | Extraterritorial | 2023 |
| HF Trading and Services Ltd | Professional & scientific | 2008 |
| HG Accountants & Tax Consultants Limited | Professional & scientific | 2012 |
| HG Glazing Ltd | Financial services | 2025 |
| HGC Estates Limited | Real estate | 2013 |
| HGC Finance Ltd | Financial services | 2020 |
| HGC Romford Limited | Health & social care | 2018 |
| HGG Properties Ltd | Households | 2019 |
| HGP Engineering Limited | Professional & scientific | 2012 |
| HH Accountancy Services Limited | Professional & scientific | 2024 |
| HH IT Services Limited | Information & communication | 2016 |
| HHG3 Cardiff Limited | Hospitality | 2024 |
| HHS Dent Limited | Health & social care | 2024 |
| HHS Teeth Limited | Health & social care | 2020 |
| HI Chai Ltd | Hospitality | 2022 |
| HI Consulting Limited | Professional & scientific | 2016 |
| HI Sky Properties Ltd | Households | 2020 |
| HI Spec Building & Maintenance Ltd | Construction | 2019 |
| Hi-Bar Property Limited | Real estate | 2021 |
| Hi-Spec Supplies Limited | Construction | 2013 |
| Hi-Tech Effects Limited | Arts & recreation | 2017 |
| Hi-Tech Motor Centre Limited | Wholesale & retail | 1988 |
| HI10 Consulting Limited | Information & communication | 2026 |
| HIA Direct Limited | Wholesale & retail | 2019 |
| HIA Limited | Real estate | 2024 |
| Hias+Jcore | Health & social care | 2008 |
| Hiba London Ltd | Wholesale & retail | 2026 |
| Hibah's Archives Ltd | Wholesale & retail | 2023 |
| Hibbert K Services Limited | Wholesale & retail | 2008 |
| Hibs Group Limited | Transport & logistics | 2019 |
| Hidden Gallery Limited | Wholesale & retail | 2025 |
| Hideaway Films Ltd | Information & communication | 2022 |
| Hideout Universal Ltd | Information & communication | 2014 |
| Higgins Mechanical Services Ltd | Construction | 2018 |
| Higgins Winstanley Family Limited | Real estate | 2025 |
| Higgins Winstanley Limited | Administrative & support | 2001 |