| Hansaworld International Limited | Information & communication | 2004 |
| Hansaworld UK Limited | Information & communication | 1998 |
| Hanson Group Construction Ltd | Construction | 2025 |
| Haque TM Ltd | Construction | 2024 |
| Harcourt Registrars Limited | Extraterritorial | 1984 |
| Hardbox Productions Ltd | Information & communication | 2020 |
| Harelands (Melsonby) Limited | Extraterritorial | 2012 |
| Harelands Courtyard 16 Limited | Extraterritorial | 2015 |
| Hargas Consulting Limited | Professional & scientific | 2019 |
| Harkerside Holdings Ltd | Financial services | 2023 |
| Harland Components Ltd | Manufacturing | 2010 |
| Harlynn Limited | Real estate | 2016 |
| Harriet Hoult Limited | Arts & recreation | 2014 |
| Harris & Besant Ltd | Administrative & support | 2013 |
| Harris and Green Properties Ltd | Real estate | 2025 |
| Harris Irwin Associates Limited | Professional & scientific | 2005 |
| Harris Irwin Holdings Limited | Financial services | 2026 |
| Harris Jones Wellbeing Limited | Health & social care | 2023 |
| Harrison Eidsgaard Limited | Administrative & support | 2005 |
| Harrison Farming Limited | Agriculture & fishing | 2025 |
| Harrison Props Limited | Real estate | 2014 |
| Harrison Renewables Ltd | Energy | 2014 |
| Harry J White Ltd | Agriculture & fishing | 2025 |
| Harrys Taxis Ltd | Transport & logistics | 2012 |
| Hartness Properties LLP | | 2023 |
| Hartness Property Investment Limited | Real estate | 2024 |
| Harvel House Farm LLP | | 2023 |
| Harvey Heating Ltd | Construction | 2017 |
| Harvey Properties North East Ltd | Real estate | 2026 |
| Hatton & Berkeley Suppliers Limited | Professional & scientific | 2016 |
| Hatton and Vernon Limited | Real estate | 2017 |
| Hatton Property Investments Ltd | Real estate | 2015 |
| Hawes Assets Ltd | Real estate | 2025 |
| Hawthorn Tree Property Limited | Households | 2018 |
| Hayama Ventures Limited | Professional & scientific | 2018 |
| Hayying Consultancy Ltd | Professional & scientific | 2025 |
| Hazelbrow Events Ltd | Real estate | 2017 |
| HBK Consultants Limited | Professional & scientific | 2013 |
| Hbldn PLC | Professional & scientific | 2016 |
| Hbldn Receivables Ltd | Professional & scientific | 2020 |
| HC Holdings (YS) Limited | Real estate | 2026 |
| Hcvp Ltd | Professional & scientific | 2022 |
| Hdrv Studio Ltd | Professional & scientific | 2024 |
| HE Official Limited | Wholesale & retail | 2016 |
| Healing Hands Chiropractic Ltd | Health & social care | 2014 |
| Healthbud Ltd | Information & communication | 2019 |
| Healthy With Homeopathy Limited | Health & social care | 2024 |
| Healy Mcnally Coaching and Education Ltd | Education | 2026 |
| Hear and Know Consultants Limited | Professional & scientific | 2010 |
| Heart Business Consultants Limited | Professional & scientific | 2013 |
| Heat Care Installation Ltd | Construction | 2013 |
| Heaven Scent Cleaning Services Ltd | Administrative & support | 2014 |
| Hebridean Island Cruises Limited | Administrative & support | 2016 |
| Hector AI Limited | Information & communication | 2018 |
| Hedgehog Furniture Limited | Manufacturing | 2018 |
| Heidi's Creative Studio Limited | Professional & scientific | 2013 |
| Heisenberg Restaurants Ltd | Hospitality | 2023 |
| Helcat Productions Limited | Arts & recreation | 2017 |
| Helen Floral Art Limited | Wholesale & retail | 2022 |
| Helium One (UK) Limited | Mining & quarrying | 2017 |
| Helius Enterprises Limited | Real estate | 1966 |
| Helius(Holdings)Limited | Real estate | 1964 |
| Hellbound Samurai Ltd | Wholesale & retail | 2024 |
| Hellenic (UK) Limited | Real estate | 1996 |
| Hellix Ltd | Administrative & support | 2010 |
| Hello Hello Media Limited | Arts & recreation | 2019 |
| Helpful Solutions Worldwide LLP | | 2018 |
| Hemisphere Investments Limited | Real estate | 2014 |
| Hemisphere Security Solutions Ltd | Education | 2011 |
| Henbury House Management Limited | Households | 2010 |
| Hennys Kitchen Limited | Hospitality | 2019 |
| Henry Fortune Limited | Professional & scientific | 2017 |
| Henson Global Limited | Financial services | 2017 |
| Henzler Talent Advisory Ltd | Administrative & support | 2022 |
| Hepple Haulage Limited | Transport & logistics | 2022 |
| Hepple Transport Limited | Transport & logistics | 2018 |
| HER Inc Ltd | Other services | 2019 |
| Hera Group Limited | Financial services | 2014 |
| Hera Properties Limited | Real estate | 1999 |
| Herbert Associates Limited | Professional & scientific | 2012 |
| Herbert Fine Wine Ltd | Wholesale & retail | 2026 |
| Heritage Enterprises Ltd | Health & social care | 2024 |
| Heritage Property Marske Limited | Real estate | 2005 |
| Hermetia Proteins Ltd | Agriculture & fishing | 2024 |
| Hermitage Editions Ltd | Information & communication | 2021 |
| Hermitage Richmond Property Management Company Limited(The) | Households | 1981 |
| Heroes Boutique Ltd | Wholesale & retail | 2012 |
| Heron Brew Limited | Professional & scientific | 2014 |
| Heron Contracting Limited | Construction | 2005 |
| Herontech UK Limited | Manufacturing | 2002 |
| Herrity Consultancy Limited | Information & communication | 2020 |
| Hersham Properties Ltd | Real estate | 2016 |
| Hester Terrace Management Company Limited | Real estate | 1994 |
| Heuer Homes Ltd | Construction | 2024 |
| Hewetson & Johnson Limited | Professional & scientific | 2015 |
| HG Talent Ltd | Professional & scientific | 2024 |
| HGL Global Consultants Limited | Public administration | 2024 |
| HGP Holdings Ltd | Financial services | 2025 |
| Hi-Line Medical Technologies Ltd | Manufacturing | 2024 |
| HIC Transport Limited | Administrative & support | 2017 |