| Have More Control Ltd | Construction | 2018 |
| Haven Hall (Boston) Limited | Households | 1997 |
| Haven Home Management Ltd | Real estate | 2022 |
| Haven Management Limited | Real estate | 1983 |
| Haverhill Mobiles Limited | Wholesale & retail | 2026 |
| Haviker Storm Automotive Ltd | Education | 2025 |
| Havs Limited | Wholesale & retail | 2008 |
| Hawarden Residents Company Limited | Households | 2003 |
| Hawas Disaster Relief Ltd | Extraterritorial | 2024 |
| Hawcroft Court RTM Company Limited | Households | 2013 |
| Hawker Consulting Limited | Professional & scientific | 2019 |
| Hawker Maintenance Company Limited | Households | 1978 |
| Hawkinsmusic Limited | Arts & recreation | 2023 |
| Hawthorn Midlands Limited | Real estate | 2016 |
| Hawthorn Park (Swanley) Management Company Limited | Households | 2018 |
| Hawthorne Place Limited | Real estate | 2022 |
| Hawthorne Square Ltd | Construction | 2019 |
| Hayaat Capital Limited | Real estate | 2024 |
| Haybital Ltd | Health & social care | 2022 |
| Haybridge Mews Management Company Limited | Households | 2004 |
| Haydon Place Management Company Limited | Households | 2005 |
| Hayes Kebab (Kent) Limited | Hospitality | 2019 |
| Hayescamber Limited | Wholesale & retail | 2023 |
| Hayward Media Group Ltd | Professional & scientific | 2021 |
| HAZ Supported Living Ltd | Health & social care | 2025 |
| Hazel Brook Management Company Limited | Households | 2011 |
| Hazel Green Over Management Company Limited | Households | 2009 |
| Hazells Farm Management Company Ltd | Households | 2015 |
| Hazelwick Mews (Crawley) Residents Management Company Limited | Households | 2007 |
| Hazelwood (Binfield) Management Company Limited | Households | 2014 |
| HB Chauffeur's Ltd | Transport & logistics | 2024 |
| HB GAS Services Ltd | Construction | 2023 |
| HB Planning Services Ltd | Construction | 2019 |
| HBD Investments Ltd | Real estate | 2023 |
| HBJ Media Limited | Professional & scientific | 2019 |
| HBS by Rana Group Ltd | Wholesale & retail | 2024 |
| HBS-3603 Limited | Real estate | 2020 |
| HBS-3703 Limited | Real estate | 2020 |
| HCA John and Sons Ltd | Administrative & support | 2014 |
| Hcgrowth Limited | Real estate | 2021 |
| HCL Fleet Services Limited | Wholesale & retail | 2010 |
| HD a and R Ltd | Wholesale & retail | 2024 |
| HD Maintenance Services Ltd | Construction | 2019 |
| HD Occupational Health Limited | Health & social care | 2015 |
| HD Property Partner Limited | Construction | 2010 |
| HD Sports Management Limited | Arts & recreation | 2015 |
| HD Traders Limited | Wholesale & retail | 2026 |
| HDH Property Consultants Limited | Professional & scientific | 2024 |
| HDI Systems Ltd | Administrative & support | 2021 |
| HE Reigns Healthcare Services Limited | Health & social care | 2016 |
| Headrush Hair Studio Limited | Other services | 2012 |
| Heads Above the Cloud Limited | Information & communication | 2015 |
| Headstart Nursery Limited | Real estate | 1992 |
| Headway Insurance Services Ltd | Financial services | 2014 |
| Healey Fold Rochdale Management Company Limited | Households | 2008 |
| Healing Centres Limited | Health & social care | 2025 |
| Healing Crystals & Gemstones Ltd | Wholesale & retail | 2024 |
| Health & Care Management Limited | Health & social care | 2003 |
| Health + Safety Consultancy Ltd. | Construction | 1999 |
| Health Access Partners Ltd | Professional & scientific | 2026 |
| Health and Education Center Limited | Education | 1999 |
| Health and Education Centre | Health & social care | 2011 |
| Health Counter Limited | Wholesale & retail | 2008 |
| Health Excellence Limited | Health & social care | 2019 |
| Health in the City Ltd | Hospitality | 2023 |
| Health-Sea Ltd | Real estate | 2019 |
| Healthcare Drugstores Limited | Professional & scientific | 2010 |
| Healthcure Pharma Limited | Wholesale & retail | 2018 |
| Healthkind Limited | Professional & scientific | 2019 |
| Healthsphere Integrated Care Ltd | Health & social care | 2025 |
| Healthtrader Limited | Information & communication | 2013 |
| Healthy World Ltd | Hospitality | 2020 |
| Healthymed Ltd | Wholesale & retail | 2019 |
| Heanal Patel Optics Ltd | Professional & scientific | 2017 |
| Hear US | Health & social care | 2009 |
| Heart Dental Hygiene Limited | Health & social care | 2023 |
| Heart Smashed Limited | Information & communication | 2023 |
| Heart With Love Ltd | Manufacturing | 2017 |
| Heartbridge Care Recruitment Limited | Administrative & support | 2026 |
| Hearth & Ramen Co. Limited | Hospitality | 2025 |
| Heat Holding (UK) Limited | Professional & scientific | 2001 |
| Heat Plan Utilities Limited | Construction | 2011 |
| Heatbeam Software Ltd | Information & communication | 2008 |
| Heath's Motors Ltd | Wholesale & retail | 2023 |
| Heathcote Court Management Company Limited | Households | 1981 |
| Heatherside Limited | Households | 1998 |
| Heathfield (Buxton) Management Limited | Households | 1990 |
| Heathfield Care Limited | Real estate | 2020 |
| Heathfield Enterprises Limited | Wholesale & retail | 1939 |
| Heathfield House (Coombe Road) Management Company Ltd | Real estate | 2010 |
| Heathfield Residents Association Limited | Real estate | 1985 |
| Heathfields (Tarporley) Management Company Limited | Households | 2011 |
| Heathglade Limited | Real estate | 1997 |
| Heathhurst Limited | Households | 1991 |
| Heathlands Knutsford Management Company Limited | Households | 2000 |
| Heathlands Place Management Company Limited | Households | 2010 |
| Heathrow Cars (GB) Ltd | Professional & scientific | 2014 |
| Heathrow Seaair Ltd | Transport & logistics | 2025 |
| Heathside Park (Hounslow) Management Limited | Households | 1988 |
| Heathside Residents' Association Limited | Households | 1970 |