| Hari OM Properties Ltd | Real estate | 2018 |
| Harjas Homes Ltd | Real estate | 2025 |
| Harland & Poston Ltd | Real estate | 2016 |
| Harlandwell Builders Limited | Wholesale & retail | 1986 |
| Harley Blue Limited | Administrative & support | 2025 |
| Harmad Properties Ltd | Real estate | 2022 |
| Harmail Healthcare Limited | Professional & scientific | 2022 |
| Harmony Care Homes (2003) Limited | Health & social care | 2003 |
| Harmony Funeral Care Limited | Other services | 2014 |
| Harmonyclear Limited | Professional & scientific | 2026 |
| Harper Homes Block Management Limited | Real estate | 2024 |
| Harper Homes Midlands Limited | Real estate | 2021 |
| Harper Services UK Limited | Other services | 2008 |
| Harrington Group Limited | Financial services | 2008 |
| Harrington Tower Cranes Limited | Administrative & support | 2015 |
| Harris Bassett Limited | Professional & scientific | 2006 |
| Harris Brickwork Limited | Construction | 2024 |
| Harris James Group Ltd | Health & social care | 2018 |
| Harris Leisure Ltd | Arts & recreation | 2015 |
| Harrison Contracts Limited | Construction | 2016 |
| Harrison Logistic Solutions Limited | Transport & logistics | 2017 |
| Harrisons Sports and Social Club Limited | Hospitality | 1996 |
| Harrula Logistic Solutions Limited | Transport & logistics | 2017 |
| Harry E Titley Ltd | Construction | 2019 |
| Harry Harvey Limited | Real estate | 2013 |
| Harry Smith and GEM Management Limited | Real estate | 2025 |
| Harsimrat Holdings Ltd | Financial services | 2019 |
| Hart New Homes Limited | Real estate | 2021 |
| Hartec Computer Services Ltd. | Information & communication | 1987 |
| Hartopp Investments Limited | Real estate | 2001 |
| Harvey Conservatories Limited | Construction | 2012 |
| Harvey-Habridge Limited | Real estate | 1969 |
| Harz Trading Limited | Professional & scientific | 2018 |
| Harzea Ltd | Transport & logistics | 2024 |
| Hasan Housing Ltd | Real estate | 2025 |
| Hascars Ltd | Wholesale & retail | 2025 |
| Hash Builders (Birmingham) Limited | Construction | 2023 |
| Hash Consultancy Ltd | Professional & scientific | 2022 |
| Hashims Bargains 786 Ltd | Wholesale & retail | 2026 |
| Hassan Spine Limited | Health & social care | 2022 |
| Hassans Supplies Ltd | Manufacturing | 2021 |
| Hassanstrading Ltd | Wholesale & retail | 2022 |
| Hateley Cycles Limited | Wholesale & retail | 1984 |
| Hatfield House Property Limited | Extraterritorial | 2017 |
| Haultech Ltd | Transport & logistics | 2025 |
| Haus Property Limited | Real estate | 2018 |
| Haven by Ruth Limited | Hospitality | 2025 |
| Haven Engineering Projects Ltd | Manufacturing | 1998 |
| Haven Law Solicitors Ltd | Professional & scientific | 2025 |
| Havenest Housing Ltd | Real estate | 2026 |
| Haverhill Holdings Limited | Real estate | 2025 |
| Havilland Industrial Limited | Real estate | 1991 |
| Havya Beauty Salon Ltd | Other services | 2019 |
| Hawk Services Ltd | Transport & logistics | 2025 |
| Hawk Trade Ltd | Wholesale & retail | 2021 |
| Hawkesworth Hair Ltd | Other services | 2017 |
| Hawkins Management Systems Ltd | Professional & scientific | 2021 |
| Hawkins Plumbing Contractors Limited | Construction | 2025 |
| Hawthorne Removals Limited | Transport & logistics | 2020 |
| Hawthorns UK Investments Limited | Professional & scientific | 2021 |
| Hawx Holdings Ltd | Wholesale & retail | 2024 |
| HAY Capital Ltd | Real estate | 2025 |
| HAY Care Recruitment and Training Limited | Public administration | 2022 |
| HAY Group Limited | Wholesale & retail | 2021 |
| HAY Pizza Limited | Hospitality | 2025 |
| HAY Property Solutions Limited | Construction | 2019 |
| Hayaat Housing Ltd | Hospitality | 2025 |
| Hayat Planning & Design Ltd | Professional & scientific | 2025 |
| Haych Collective Ltd | Information & communication | 2026 |
| Hayder Homes Ltd | Real estate | 2023 |
| Haydyn's Treats Ltd | Hospitality | 2025 |
| Hayer Consultants Limited | Professional & scientific | 2009 |
| Hayfield Grove Management Limited | Households | 2020 |
| Hayley Nails Spa Limited | Other services | 2026 |
| Hayman Consultancy Ltd | Professional & scientific | 2019 |
| Haytee Digital Limited | Wholesale & retail | 2025 |
| Haytee Limited | Real estate | 2025 |
| Hayters (Exports) Limited | | 1923 |
| Hayyat Pharma Limited | Health & social care | 2024 |
| Hazelhurst Property Investments Ltd | Real estate | 2018 |
| Hazelwood Takeaway Limited | Hospitality | 2025 |
| Hazz Group Holdings Ltd | Financial services | 2024 |
| HBK IT Consultants Ltd | Information & communication | 2019 |
| HBK Traders Ltd | Wholesale & retail | 2021 |
| HBW Barbers Limited | Other services | 2022 |
| HBZ Property Solutions Ltd | Real estate | 2023 |
| HC (Aldridge) Limited | Other services | 2006 |
| HCL Property Ltd | Real estate | 2022 |
| HCL Skin Limited | Health & social care | 2021 |
| HCM Property Investment Ltd | Real estate | 2021 |
| HD FIX Ltd | Construction | 2026 |
| Hdixon Ltd | Wholesale & retail | 2019 |
| HDP Community Inns Limited | Hospitality | 2023 |
| Head Shot Gaming Ltd | Information & communication | 2024 |
| Head Start Tuition Limited | Education | 2016 |
| Headquarterz Barbers Ltd | Other services | 2019 |
| Headspace Studio Limited | Other services | 2024 |
| Headstart at ST John's Ltd | Professional & scientific | 2009 |
| Headstones Direct Limited | Manufacturing | 2020 |
| Heal by Yoga Ltd | Education | 2025 |