| Heatbase Solutions Ltd | Manufacturing | 2026 |
| Heath and Norris Ltd | Wholesale & retail | 2021 |
| Heathcollis Ltd | Construction | 2010 |
| Heather Brown Limited | Information & communication | 2014 |
| Heather's Tearoom Ltd | Hospitality | 2022 |
| Heatherdene Management Company Limited | Hospitality | 1995 |
| Heatherlea Clinic 2 Ltd | Other services | 2024 |
| Heathfield (Parkstone) Limited | Real estate | 2014 |
| Heathlands DB Pension Limited | Financial services | 2025 |
| Heathwood Consulting Ltd | Administrative & support | 2016 |
| Heatrite (Dorset) Ltd | Construction | 2022 |
| Heavebury Limited | Manufacturing | 1979 |
| Heavenly Divine Decor Limited | Wholesale & retail | 2017 |
| Heck Holdings Limited | Real estate | 2018 |
| Hector Benjamin (UK) Limited | Real estate | 2004 |
| Hedgebay Partners UK Limited | Financial services | 2015 |
| Heidi Cruwys Limited | Arts & recreation | 2003 |
| Heidi Perks Books Ltd | Information & communication | 2017 |
| Heights (UK) Investments Limited | Real estate | 1995 |
| HEIGHTS2018 RTM Company Limited | Households | 2018 |
| Helen J Perkins Consulting Ltd | Professional & scientific | 2024 |
| Hello Aurora Ltd | Information & communication | 2024 |
| Hello-Cirro Limited | Information & communication | 2013 |
| Help and Heal Community Project Ltd | Agriculture & fishing | 2024 |
| Help Spot IT Ltd | Information & communication | 2026 |
| Helping Hands, Healing Hooves Ltd | Other services | 2019 |
| Helpz Limited | Other services | 2021 |
| Helpz Rewards Limited | Information & communication | 2025 |
| HEM Logistics Ltd | Transport & logistics | 2025 |
| Hemant Properties Limited | Real estate | 2025 |
| Hemco Investments Limited | Professional & scientific | 2013 |
| Hemsworth Farms LLP | | 2011 |
| Hend Consulting Limited | Financial services | 2019 |
| Hendonis Limited | Other services | 2020 |
| Hendonis Promotions Ltd | Professional & scientific | 2024 |
| Hengist Properties Ltd | Households | 2024 |
| Hengist Road Freehold Company Limited | Households | 2012 |
| Hengist Road Management Company Limited | Real estate | 2025 |
| Hengist Stays Limited | Real estate | 2021 |
| Hengistbury Head Limited | Real estate | 2019 |
| Hengistbury House Management Company Limited | Households | 2006 |
| Henhay Ltd | Arts & recreation | 2015 |
| Hennessy Construction South Ltd | Construction | 2024 |
| Hennings Wharf Apartments Ltd | Households | 2003 |
| Henriikka Limited | Construction | 2014 |
| Henry Ross Limited | Professional & scientific | 2007 |
| Henry William Group Ltd | Financial services | 2018 |
| Herbdox Limited | Manufacturing | 2023 |
| Herbert Road Estates Limited | Households | 2008 |
| Herbert Road Freehold Company Limited | Households | 2007 |
| Herbforty Ltd | Wholesale & retail | 2021 |
| Herbies Fish & Chips Ltd | Hospitality | 2025 |
| Heritage Chimney & Masonry Ltd | Construction | 2025 |
| Heritage Concert Productions Limited | Education | 1998 |
| Heritage Court (Canford Cliffs) Management Limited | Households | 1991 |
| Heritage Repointing Solutions Ltd | Construction | 2024 |
| Hermitage Consultancy Limited | Professional & scientific | 2025 |
| Hero UK Foods Limited | Wholesale & retail | 1992 |
| Hero UK Holdings Limited | Wholesale & retail | 2010 |
| Heron Court (Winton) Management Limited | Households | 2024 |
| Heron Court RTM Company Ltd | Households | 2012 |
| Heron House Management (Bournemouth) Limited | Real estate | 2004 |
| Herons Court Limited | Households | 1999 |
| Herronix Ltd | Information & communication | 2024 |
| Hesketh Investments Limited | Financial services | 2018 |
| Hewn & Whole Solutions Ltd | Construction | 2025 |
| Hexertia Ltd | Professional & scientific | 2023 |
| Heyday Living LLP | | 2025 |
| Heyflexi Limited | Wholesale & retail | 2023 |
| Heys Play Ltd | Hospitality | 2019 |
| Heyshott Consulting Ltd | Information & communication | 2008 |
| HGC Consultants Ltd | Construction | 2005 |
| HGW Trading Ltd | Construction | 2026 |
| HH Accommodations Limited | Hospitality | 2026 |
| HH Financial Advisory Limited | Financial services | 2019 |
| HH Physio Limited | Other services | 2018 |
| Hhgc Limited | Financial services | 2017 |
| HI Focus Management Ltd | Professional & scientific | 2014 |
| HI Media Limited | Manufacturing | 2023 |
| HI Property Limited | Real estate | 1998 |
| HI REZ Industries Ltd | Professional & scientific | 2020 |
| HI Tech Building and Construction Ltd | Construction | 2019 |
| HI Tech Commercial Construction Limited | Construction | 2021 |
| HI Tech Construction Services Limited | Construction | 2021 |
| HI Tech Development Servces Limited | Construction | 2021 |
| HI Tech Facilities Services Limited | Professional & scientific | 2024 |
| HI Tech Group Limited | Financial services | 2024 |
| HI Tech Procurement Limited | Professional & scientific | 2021 |
| HI Tech Services Dorset Ltd | Construction | 2025 |
| HI Tech Steel Fabrication Limited | Manufacturing | 2019 |
| HI Therapies Limited | Other services | 2011 |
| Hi-Fi House Limited | Households | 2009 |
| Hi-Ground Ltd | Manufacturing | 2012 |
| Hibiscus-Cosmetics Limited | Wholesale & retail | 2023 |
| Hiclass Accounting Limited | Professional & scientific | 2023 |
| Hidden Inches Limited | Administrative & support | 2022 |
| Hidden Profiles Movie Ltd | Information & communication | 2024 |
| Higgins Hotels Limited | Real estate | 1998 |
| High Maintenance Fine Decor Limited | Construction | 2022 |
| High Point Poole Ltd | Real estate | 2005 |