| Harmer Fitz Douglas Limited | Professional & scientific | 2015 |
| Harminy Developments Ltd | Real estate | 2023 |
| Harmonia Interiors Limited | Real estate | 2020 |
| Harmony by Drsk Ltd | Health & social care | 2024 |
| Harmony Inn Derby Ltd | Hospitality | 2024 |
| Harmony Interiors (UK) Limited | Wholesale & retail | 2001 |
| Harmony Place MG Investments Ltd | Real estate | 2024 |
| Harmony Stitches Ltd | Wholesale & retail | 2026 |
| Harmy&Rome Limited | Health & social care | 2026 |
| Haroon AMZ Ltd | Wholesale & retail | 2025 |
| Haroon Host Ltd | Wholesale & retail | 2024 |
| Haroon Wealth Limited | Real estate | 2025 |
| Harper and Carter's Chauffeured Cars Limited | Transport & logistics | 2019 |
| Harping Services Ltd | Information & communication | 2017 |
| Harpur's Coaches Limited | Transport & logistics | 2003 |
| Harpurs & Company Limited | Professional & scientific | 2011 |
| Harricon Ltd | Information & communication | 2011 |
| Harrier Trail Running Limited | Wholesale & retail | 2020 |
| Harrier Truck Ltd | Wholesale & retail | 2019 |
| HARRIET14 Prop Ltd | Households | 2022 |
| Harrington Knight Limited | Construction | 2022 |
| Harrington-Simpsons Properties Limited | Real estate | 2018 |
| Harriott’S Home Maintenance Ltd | Other services | 2025 |
| Harris Amjed Real Estate Ltd | Real estate | 2013 |
| Harris Capitalco Ltd | Financial services | 2020 |
| Harris Residential Lets Ltd | Real estate | 2025 |
| Harris Roofing Contractors Limited | Construction | 2023 |
| Harrison Building Ltd | Construction | 2019 |
| Harrison Carrazco Ltd | Professional & scientific | 2025 |
| Harrison Facilities Management Group Limited | Administrative & support | 2014 |
| Harrison Flexible Maintenance Services Limited | Administrative & support | 2021 |
| Harrisons Housing Ltd | Real estate | 2023 |
| Harry Foods Limited | Hospitality | 2025 |
| Harryblaq Ltd | Transport & logistics | 2017 |
| Harryshomeimprovments Ltd | Construction | 2024 |
| Harsh Haulage Ltd | Transport & logistics | 2016 |
| Hart Aggregates Limited | Extraterritorial | 1972 |
| Hartan Transport Ltd | Transport & logistics | 2017 |
| Hartside View (Hartlepool) Residents Management Company Limited | Households | 2022 |
| Harvest Canton Limited | Hospitality | 2024 |
| Harvey & Timms Commercial Limited | Real estate | 2018 |
| Harvey & Timms Ltd | Real estate | 2017 |
| Harvey Beric Associates Limited | Administrative & support | 1998 |
| Harvey Building Services Ltd | Construction | 2024 |
| Harvey Douglas Solutions Limited | Professional & scientific | 2002 |
| Harvey Luke Limited | Other services | 2003 |
| Harvey PSG Holdings Ltd | Real estate | 2019 |
| Harvey PSG Ltd | Real estate | 2017 |
| Harvey's Fast Food Ltd | Hospitality | 2022 |
| Harwood Performance Source Ltd | Wholesale & retail | 2007 |
| Harwood Surveyors Ltd | Professional & scientific | 2016 |
| Hasan Brothers Ltd | Transport & logistics | 2023 |
| Haseeb Halal Meat and Grocery Limited | Wholesale & retail | 2024 |
| Hashcode Digital Limited | Information & communication | 2018 |
| Hasluck & Sons Property Limited | Real estate | 2018 |
| Hasmo Trading Limited | Real estate | 2021 |
| Hasnat Consultancy Ltd | Information & communication | 2018 |
| Hassington Ltd | Real estate | 2022 |
| Hasthi Global Limited | Wholesale & retail | 2022 |
| Haston Direct Investments Limited | Real estate | 2018 |
| Hasu ZEN Ltd | Health & social care | 2024 |
| Haswell Group Ltd | Financial services | 2026 |
| Hathor Solutions Limited | Professional & scientific | 2013 |
| Hatocan Limited | Professional & scientific | 2013 |
| Hatton Butchers Ltd | Wholesale & retail | 2016 |
| Haul Haulage Limited | Transport & logistics | 2025 |
| Haulage and Construction Ltd | Construction | 2022 |
| Haus of Flawless Ltd | Other services | 2025 |
| Haus of Villain Ltd | Wholesale & retail | 2023 |
| Haval Ltd | Construction | 2024 |
| Havana Cigar Exchange Ltd | Professional & scientific | 2018 |
| Haven Home Care Group Ltd | Health & social care | 2014 |
| Haven Properties (Tendring) Limited | Households | 2023 |
| Haven Property Enterprises Ltd | Real estate | 2020 |
| Havender Living Limited | Real estate | 2025 |
| Havendish Associates Limited | Administrative & support | 2006 |
| Havenfix Services Ltd | Construction | 2025 |
| Havenstone Care Ltd | Health & social care | 2026 |
| Havspro Limited | Manufacturing | 2015 |
| Hawk and Buckle Holdings Limited | Real estate | 2026 |
| Hawkes Tours (Derby) Limited | Transport & logistics | 2012 |
| Hawkins & Shepherd Limited | Wholesale & retail | 2002 |
| Hawks Enterprises Limited | Wholesale & retail | 2022 |
| Hawksworth Medical Secretarial Services Limited | Administrative & support | 2023 |
| Hawley Property Group Ltd | Real estate | 2024 |
| Hawthorn Court Management Company (Southcroft) Limited | Other services | 2008 |
| Hawthorn Field Limited | Professional & scientific | 2026 |
| Hawthorne Construction Ltd | Construction | 2017 |
| Hayas-Uk Ltd | Real estate | 2020 |
| Haybale Homes Ltd | Real estate | 2022 |
| Hayden Foster Limited | Financial services | 2006 |
| Hayer Education Recruitment Ltd | Administrative & support | 2025 |
| Hayley Hudson Limited | Education | 2022 |
| Hayman Quantrill Limited | Administrative & support | 2009 |
| Haynes Property Services Ltd | Real estate | 2024 |
| HAZ Solutions Limited | Wholesale & retail | 2025 |
| Haze Music Ltd | Arts & recreation | 2026 |
| Hazel Court Management Company (Drage Street) Limited | Households | 2005 |
| Hazelford Care Home Ltd | Health & social care | 2021 |
| Hazelford Way Management Company Limited | Real estate | 2004 |