| Haven Heights Management Limited | Households | 2003 |
| Haven Manor (Canford Cliffs) Limited | Households | 2015 |
| Haven Medical Integrated Healthcare Ltd | Health & social care | 2023 |
| Haven Prime Stays Limited | Real estate | 2025 |
| Haven Renovation Ltd | Construction | 2025 |
| Havenwood Furniture Ltd | Wholesale & retail | 2025 |
| Havilah Housing Ltd | Real estate | 2025 |
| Haviland Place Limited | Households | 2001 |
| Haviland Tales Ltd | Financial services | 2024 |
| Hawden Ltd | Hospitality | 2024 |
| Hawk Marine Ltd | Manufacturing | 2018 |
| Haxevor Ltd | Wholesale & retail | 2026 |
| Haya Naveen Limited | Health & social care | 2025 |
| Hayes Consulting Ltd | Professional & scientific | 2009 |
| Hayes on the Chine Freehold Limited | Households | 2009 |
| Hayes Property Holdings Ltd | Real estate | 2019 |
| Hayleigh Dibben Ltd | Wholesale & retail | 2026 |
| Hayley's Hair Removal & Aesthetics Ltd | Health & social care | 2022 |
| Haymoor Homes Ltd | Real estate | 2025 |
| Haymoor Views (Management) Limited | Households | 2008 |
| Haynes Marcoms Limited | Professional & scientific | 2019 |
| Haysom Holdings Ltd | Mining & quarrying | 2000 |
| Haysom Purbeck Stone Ltd | Mining & quarrying | 1999 |
| Hayward & Wells Limited | Information & communication | 2026 |
| HAZ Management Ltd | Construction | 2007 |
| Hazel and West Holdings Limited | Financial services | 2020 |
| Hazel and West Limited | Construction | 2010 |
| Hazel Law Investments Limited | Other services | 2019 |
| Hazza Limited | Other services | 2017 |
| HBH Bentley Ltd | Construction | 2025 |
| HC Performance Systems Ltd | Professional & scientific | 2018 |
| HCC Holdings Limited | Professional & scientific | 2018 |
| HCM Ltd | Construction | 2008 |
| Hcoleproperty Ltd | Real estate | 2025 |
| HCV Heating Cooling &Ventilation Ltd | Manufacturing | 2024 |
| HD Building & Plastering Ltd. | Other services | 2014 |
| HD Kitchens Ltd | Construction | 2021 |
| HDA (UK) Ltd. | Extraterritorial | 2001 |
| HDK Home Carers Ltd | Health & social care | 2025 |
| HDK Home EYE Care Ltd | Wholesale & retail | 2025 |
| HDM (Sandhurst) Limited | Construction | 2017 |
| HDM Leisure Limited | Construction | 2009 |
| HE Financing Ltd | Information & communication | 2020 |
| Head in the Clouds Consulting Limited | Professional & scientific | 2024 |
| Head Restart Limited | Administrative & support | 2024 |
| HEAD2TOE Protection Ltd | Manufacturing | 2019 |
| HEAD2TOE Workwear Ltd | Wholesale & retail | 2023 |
| Headchannel Consulting Limited | Professional & scientific | 2020 |
| Heal to TOE Ltd | Other services | 2025 |
| Healaura Limited | Wholesale & retail | 2025 |
| Healing Meme Ltd | Health & social care | 2024 |
| Health NET Services Limited | Financial services | 2002 |
| Healthcare Service Design Ltd | Information & communication | 2024 |
| Healthcaresouth+ Ltd | Administrative & support | 2024 |
| Healthcorp Limited | Financial services | 2010 |
| Healthdecoded Limited | Information & communication | 2009 |
| Healthnet Enterprises Limited | Financial services | 2002 |
| Healthtrust Ltd | Financial services | 2003 |
| Healy Consulting Ltd | Professional & scientific | 2024 |
| Hearnes Bournemouth Limited | Real estate | 2021 |
| Hearnes Poole Ltd | Real estate | 2015 |
| Hearnes Wimborne Limited | Real estate | 2014 |
| Heart and Soul Studio Limited | Wholesale & retail | 2011 |
| Heart Clinic Poole Limited | Health & social care | 2013 |
| Heart of Gold Holidays Ltd | Manufacturing | 2024 |
| Heat & GAS Solutions Limited | Construction | 2017 |
| Heat Assembly Limited | Information & communication | 2022 |
| Heatexchangerspares.Com Limited | Wholesale & retail | 2000 |
| Heath International Ltd | Administrative & support | 2019 |
| Heathcote Care Homes Limited | Extraterritorial | 2012 |
| Heather & Cove Ltd | Other services | 2026 |
| Heather Baird Limited | Administrative & support | 2025 |
| Heather Culpan Garden Design Limited | Professional & scientific | 2025 |
| Heatherlands III Management (Number 2) Limited | Households | 1987 |
| Heathside Properties Limited | Construction | 2021 |
| Heating Spares Specialists Limited | Wholesale & retail | 1995 |
| Heaven Trades Limited | Wholesale & retail | 2021 |
| Heaven Trading Ltd | Hospitality | 2019 |
| Heavenly Homes Properties Ltd | Real estate | 2025 |
| Heavy Moon Recordings Limited | Information & communication | 2015 |
| Hebumbo Limited | Information & communication | 2024 |
| Hecht Ltd | Professional & scientific | 2024 |
| Heckford Park Cabin Ltd | Hospitality | 2022 |
| Hedge-Fx Ltd | Information & communication | 2021 |
| Hedgehog Protection Services Ltd | Financial services | 2018 |
| Hedhertz Limited | Real estate | 2017 |
| Heidel Global Limited | Wholesale & retail | 2025 |
| Heirloom Hampers Limited | Wholesale & retail | 2021 |
| Heka Collective Ltd | Wholesale & retail | 2025 |
| Helen's Caring Heart Ltd | Health & social care | 2025 |
| Helene Limited | Real estate | 2017 |
| Helenick Investments Ltd. | Real estate | 2017 |
| Helford Fratello Ltd | Financial services | 2026 |
| Helford Ltd | Manufacturing | 2010 |
| Helford Sorella Ltd | Financial services | 2026 |
| Helik Ltd | Administrative & support | 2018 |
| Helix Brands Limited | Wholesale & retail | 1991 |
| Helix Risk Solutions Ltd | Financial services | 2025 |
| Helix Solutions Ltd | Construction | 2025 |
| Hellenic Divine Bites Ltd | Hospitality | 2025 |