| Heathstock Farm Ltd | Real estate | 2022 |
| Heatlab Ltd | Construction | 2022 |
| Heaton Ainsworth Limited | Professional & scientific | 1999 |
| Heavenly Views Cottages LLP | | 2025 |
| Hebp Ltd | Education | 2022 |
| Hectare Capital Ltd | Real estate | 2023 |
| Hector Andrews Limited | Other services | 2020 |
| Hector Investments LLP | | 2021 |
| Helen Johnsen Consultancy Ltd | Professional & scientific | 2024 |
| Helen Norquay Locum Ltd | Health & social care | 2021 |
| Heliuk Ltd | Transport & logistics | 2023 |
| Hello Plants Ltd | Wholesale & retail | 2020 |
| Helping Health Limited | Information & communication | 2006 |
| Helyar Services Limited | Information & communication | 2013 |
| Hemisphere Properties Ltd | Real estate | 2023 |
| Henderson Parker Stone Limited | Professional & scientific | 2007 |
| Hendford House Property Management Limited | Households | 2005 |
| Hendras@Penryn Limited | Wholesale & retail | 2007 |
| Hendy-Hines Limited | Wholesale & retail | 2025 |
| Henfields Cabins Limited | Hospitality | 2018 |
| Henfields Enterprises Limited | Real estate | 2017 |
| Henry MK Ltd | Administrative & support | 2026 |
| Henscott Barton Limited | Agriculture & fishing | 2021 |
| Henson Engineering Ltd | Manufacturing | 2024 |
| Herbella Integrated Services Limited | Wholesale & retail | 2022 |
| Herbert EYE Surgeons Ltd | Health & social care | 2016 |
| Heritage Charters Holdings Limited | Financial services | 2023 |
| Heritage Charters LLP | | 2018 |
| Heritage Independent Financial Consultancy Ltd | Financial services | 2014 |
| Heritage Mill (Wellington) Apartments Management Company Limited | Households | 2017 |
| Heritage Mill (Wellington) Management Company Limited | Households | 2017 |
| Herringston Estates Company Limited | Real estate | 1968 |
| Herringston Farms Ltd | Agriculture & fishing | 2021 |
| Hestine Ltd | Health & social care | 2023 |
| Hewhub Limited | Information & communication | 2019 |
| Hewitt Studios LLP | | 2008 |
| Hewson International Limited | Transport & logistics | 2017 |
| Hexobox Limited | Information & communication | 2021 |
| Hext Property Limited | Households | 2024 |
| HEY Loveable CIC | Health & social care | 2022 |
| Heyford Veterinary Centre Ltd | Professional & scientific | 2025 |
| Heyl Build Ltd | Construction | 2023 |
| HF Christian Ltd | Financial services | 2025 |
| Hffb Limited | Real estate | 2002 |
| HFM Asset Management Ltd | Professional & scientific | 2024 |
| HG (South West) Limited | Financial services | 2020 |
| Hi-Spec Trees Limited | Administrative & support | 2019 |
| Hibbitt SW Ltd | Real estate | 2021 |
| Hiccombe Limited | Real estate | 2010 |
| Hickin Electrical Wholesale Limited | Wholesale & retail | 2000 |
| Hickleys Healthcare Limited | Wholesale & retail | 2024 |
| Hickleys Holdings Limited | Financial services | 2024 |
| Hickleys Limited | Wholesale & retail | 2007 |
| Hickleys Technical Workshops Limited | Wholesale & retail | 2024 |
| Hidden Beacon Ltd | Construction | 2014 |
| Hiflux Limited | Manufacturing | 2000 |
| Higdon Homes Limited | Construction | 2017 |
| High Cross Woodards Apartments Management Limited | Households | 2004 |
| High Spec Roofing (SW) Limited | Construction | 2021 |
| Highbridge Caravan Centre Limited | Wholesale & retail | 1985 |
| Highbury Cars Limited | Wholesale & retail | 2015 |
| Higher Farm Management Limited | Households | 1998 |
| Higher Litchardon Ltd | Financial services | 2024 |
| Highest Limited | Information & communication | 2015 |
| Highet Assets Ltd | Financial services | 2023 |
| Highfield Construction & Maintenance Limited | Construction | 2015 |
| Highfield Mortgage Consultancy Ltd | Financial services | 2025 |
| Highfields (Walton) Management Company Ltd | Households | 2019 |
| Highgrove Commercial Properties Ltd | Real estate | 2021 |
| Highland Court (ASH Priors) Management Limited | Households | 2004 |
| Highspec Glass Ltd | Manufacturing | 2018 |
| Hilary Andrew Ltd | Professional & scientific | 2011 |
| Hilditch NO1 Limited | Financial services | 2024 |
| Hill Power Racing Limited | Wholesale & retail | 2012 |
| Hill View Kitchens and Furniture Ltd | Manufacturing | 2012 |
| Hillacre Lettings Limited | Real estate | 2025 |
| Hillfort House Residents Association Limited | Households | 2014 |
| Hills Electrical Services Limited | Construction | 2007 |
| Hindhayes Lane (Brockham END) Ltd | Real estate | 2003 |
| Hindsite Construction Limited | Construction | 2004 |
| Hinkley and Gravity Accommodation Limited | Households | 2025 |
| Hinton Wood Holdings Limited | Financial services | 2026 |
| Hippo Properties & Investments Ltd | Real estate | 2016 |
| Hippo Ventures Limited | Professional & scientific | 2012 |
| Hipz (Health Improvement Project Zanzibar) | Health & social care | 2016 |
| HIT the HAY Ltd | Professional & scientific | 2018 |
| Hiya & Hello Limited | Arts & recreation | 2017 |
| HJ & HB Case Limited | Agriculture & fishing | 2000 |
| HJ Elkins Limited | Real estate | 2020 |
| Hjhworx Ltd | Manufacturing | 2021 |
| Hlanghout Limited | Administrative & support | 2009 |
| Hltt Limited | Professional & scientific | 2025 |
| HMC SW Ltd | Hospitality | 2023 |
| Hmmvs Ltd | Financial services | 2022 |
| Hmoco Ltd | Real estate | 2025 |
| Hobbs Investments Ltd | Financial services | 2022 |
| Hockaday Sales & Design Limited | Wholesale & retail | 2014 |
| Hockley Court Management Co. Limited | Households | 1973 |
| Hockworthy Limited | Information & communication | 2011 |
| Hol-Saf Design Limited | Professional & scientific | 1969 |