| Harman Welch Engineering Ltd | Professional & scientific | 2024 |
| Harmon Proficient Ltd | Administrative & support | 2019 |
| Harmonic Controls Ltd | Administrative & support | 2013 |
| Haroon Barber Warrington Ltd | Other services | 2024 |
| Harriet Stockwell Limited | Arts & recreation | 2018 |
| Harrild Projects Limited | Administrative & support | 2015 |
| Harringtons Healthcare Ltd | Health & social care | 2024 |
| Harris and Reeves Property Holdings Ltd | Real estate | 2019 |
| Harris and Sephton Limited | Construction | 2025 |
| Harris Bates Photo Ltd | Manufacturing | 2025 |
| Harris Family Travel Ltd | Administrative & support | 2023 |
| Harrison Barlow Mortgages Limited | Financial services | 2019 |
| Harrison Bioservices Ltd | Administrative & support | 2022 |
| Harrison Memorials Limited | Wholesale & retail | 2011 |
| Harrison Project Management Consultancy Limited | Administrative & support | 2015 |
| Harrison Properties 2014 Limited | Real estate | 2015 |
| Harrison Property & Developments Ltd | Real estate | 2026 |
| Harrison Stock Consulting Limited | Administrative & support | 2018 |
| Harrison Tree Services (North West) Limited | Agriculture & fishing | 2019 |
| Harrod Interior Construction Ltd | Construction | 2023 |
| Harrold Healthcare Ltd | Health & social care | 2014 |
| Harrsmith Consultancy Ltd | Professional & scientific | 2026 |
| Hart Engineering and Compliance Limited | Professional & scientific | 2014 |
| Hart's of Warrington (Drapers) Limited | Wholesale & retail | 1977 |
| Hartcom Solutions Limited | Administrative & support | 2014 |
| Harthill Wind Limited | Energy | 2011 |
| Hartland Films Ltd | Administrative & support | 2021 |
| Hartley Evolution Holdings Limited | Financial services | 2025 |
| Hartley-Smith Consulting Limited | Professional & scientific | 2023 |
| Harun Limited | Hospitality | 2023 |
| Harvard IT Limited | Information & communication | 2019 |
| Harvester Wealth Limited | Administrative & support | 2010 |
| Harvey Engineering & Design Limited | Administrative & support | 2013 |
| Harvey Supplies Limited | Wholesale & retail | 2018 |
| Harwood Jones Ltd | Other services | 2024 |
| Harwood Quarry Company Limited | Mining & quarrying | 1938 |
| Harwood Quarry Holdings Ltd | Financial services | 2020 |
| Harworth Power (Generation) Limited | Energy | 2012 |
| Hass GAS Ltd | Professional & scientific | 2019 |
| Hassall Gill Limited | Administrative & support | 2004 |
| Hassan Khalil Ltd | Information & communication | 2017 |
| Hatch Electrical Systems Limited | Administrative & support | 2015 |
| Hatchard Projects Limited | Professional & scientific | 2019 |
| Hatchway Products Limited | | 1985 |
| Hatrick Consulting Limited | Information & communication | 2020 |
| Hatters Chase Management Company Limited | Households | 2021 |
| Hattonepms Ltd | Construction | 2023 |
| Haulage Consultants Ltd | Professional & scientific | 2016 |
| Haulage G&S Ltd | Transport & logistics | 2019 |
| Haulagehub Technologies Ltd | Information & communication | 2019 |
| Haus Birmingham Ltd | Real estate | 2020 |
| Haus Concrete Ltd | Manufacturing | 2023 |
| Haus Manchester Ltd | Real estate | 2017 |
| Hausheat Ltd | Construction | 2025 |
| Hausz Ltd | Real estate | 2018 |
| Haven Care and Support Limited | Health & social care | 2007 |
| Haven House Supported Living Limited | Health & social care | 2025 |
| Haven IT Solutions Limited | Real estate | 2015 |
| Havenstone Ltd | Professional & scientific | 2013 |
| Hawkestech Limited | Professional & scientific | 2011 |
| Hawkglobe Management Limited | Information & communication | 2020 |
| Hawkins Heating Ltd | Manufacturing | 2006 |
| Hawks R US Limited | Arts & recreation | 2013 |
| Hawksmoor Holdings Limited | Professional & scientific | 2015 |
| Hawram Construction Limited | Construction | 2024 |
| Haydn Projects Limited | Administrative & support | 2024 |
| Haydock Furniture Limited | Wholesale & retail | 2016 |
| Haydock Lodge RTM Company Ltd | Households | 2013 |
| Hayelind Limited | Construction | 1984 |
| HAYES18 Ltd | Arts & recreation | 2025 |
| Hayiley Limited | Wholesale & retail | 2025 |
| Hayle Management Company Limited | Real estate | 2006 |
| Hayleys Little Heroes Limited | Education | 2022 |
| Haynes Holmes Homes Limited | Construction | 2005 |
| Hayscastle Electrical Services (North West) Limited | Construction | 2014 |
| Haystacks Ltd | Professional & scientific | 2025 |
| Hayton Heyes Limited | Professional & scientific | 2019 |
| Hayward Performing Arts Ltd | Arts & recreation | 2001 |
| HAZ Engineering Ltd | Professional & scientific | 2017 |
| HAZ IT Limited | Information & communication | 2019 |
| Hazchem Training Ltd | Education | 2006 |
| Hazel Elif Ltd | Hospitality | 2023 |
| Hazel Tree Education Ltd | Administrative & support | 2022 |
| HBA Projects Ltd | Administrative & support | 2025 |
| HBH Consultancy Services Ltd | Professional & scientific | 2022 |
| Hblc Farming Ltd | Real estate | 2026 |
| Hbworld Ltd | Arts & recreation | 2020 |
| HC Corporate Ltd | Administrative & support | 2021 |
| HC Memorabilia Ltd | Wholesale & retail | 2023 |
| HC Optical Ltd | Professional & scientific | 2023 |
| HC Safety and Risk Limited | Professional & scientific | 2017 |
| HC Squared Ltd | Professional & scientific | 2022 |
| HCC Promotions Limited | Manufacturing | 2003 |
| HCD Consultancy Ltd | Information & communication | 2023 |
| Hcga Consulting Ltd | Administrative & support | 2026 |
| HCM Studios Ltd | Wholesale & retail | 2023 |
| HCR Aviation Ltd | Administrative & support | 2025 |
| HD 03 Ltd | Hospitality | 2025 |
| HD Tutoring Limited | Education | 2026 |
| HDCO9 Limited | Financial services | 2021 |