| Harry Whittington Racing Limited | Arts & recreation | 2017 |
| Harry's Poetryy Limited | Education | 2026 |
| Hartford Automotive Ltd | Wholesale & retail | 2012 |
| Hartford Point (Burnham) Ltd | Construction | 2021 |
| Harts Hill Barns Management Company Ltd | Households | 2025 |
| Harts Hill Farm (Newbury) Management Limited | Households | 2005 |
| Hartwood Oak Buildings Limited | Construction | 2011 |
| Harvard Corporate Resources Limited | Professional & scientific | 1993 |
| Harvest View (Beedon) Management Company Ltd | Households | 2026 |
| Harveys Insolvency & Turnaround Ltd | Professional & scientific | 2013 |
| HAS2 Property Ltd | Real estate | 2019 |
| Hasemore Limited | Administrative & support | 2000 |
| Hassan Barber Newbury Ltd | Other services | 2024 |
| Hatch & Scale Ltd | Professional & scientific | 2025 |
| Hatch House Games Limited | Financial services | 2021 |
| Hatch House IP Limited | Extraterritorial | 2020 |
| Hawk Sight Security Risk Management Ltd | Administrative & support | 2014 |
| Hawkeye Pest Control Ltd | Agriculture & fishing | 2005 |
| Hawkins Hydro Limited | Energy | 2011 |
| Hawkridge Wood Farm Limited | Agriculture & fishing | 2010 |
| Hawks Management Limited | Real estate | 2025 |
| Hawthorne Electrical Services Ltd | Construction | 2024 |
| HBS Holdings Limited | Financial services | 2006 |
| HCA (Manchester) Limited | Financial services | 2016 |
| HCA Business Support Limited | Real estate | 2017 |
| HCA Business Support Services Ltd | Professional & scientific | 2020 |
| HCA Personal Tax Services Ltd | Professional & scientific | 2020 |
| Hcdn Management Ltd | Real estate | 2012 |
| HE & PB Limited | Real estate | 2026 |
| Headley Body Shop Limited | Wholesale & retail | 1993 |
| Headlight Glasses Ltd | Wholesale & retail | 2022 |
| Heads Farm Constructions Limited | Construction | 2011 |
| Health Blossom Limited | Health & social care | 2014 |
| Health Metrics UK Ltd | Extraterritorial | 2017 |
| Healthspring Wellness Product Limited | Wholesale & retail | 2016 |
| Heat and Combustion Supplies Limited | Extraterritorial | 1991 |
| Heat Cynergy Limited | Administrative & support | 2017 |
| Heatherwold Equipark Operations Limited | Agriculture & fishing | 2023 |
| Hedges & SON Limited | Construction | 2018 |
| Hego Limited | Construction | 2015 |
| Helen Court Residents Company Limited | Households | 2000 |
| Helen Hyde & Associates Limited | Administrative & support | 2020 |
| Helen Lewis Ltd | Manufacturing | 2011 |
| Heli Aviation (U.K.) Limited | Transport & logistics | 2003 |
| Heliaviation Ltd | Transport & logistics | 1999 |
| Helios Asset Holdings Ltd | Financial services | 2025 |
| Helirig Limited | Construction | 2007 |
| Helix Blue Limited | Professional & scientific | 2013 |
| Helix Construct Limited | Construction | 2017 |
| Helix Consulting & Project Management Ltd | Other services | 2016 |
| Helix Homes & Property Limited | Construction | 2025 |
| Helix Parent Holdings Limited | Financial services | 2017 |
| Helix Partnership Homes (Western) Limited | Construction | 2023 |
| Helix Partnership Homes Limited | Real estate | 2017 |
| Hell's Gate Ltd | Arts & recreation | 2012 |
| Help Direct Ltd | Transport & logistics | 2021 |
| Helpme Group Ltd | Information & communication | 2014 |
| Hencilla Canworth Limited | Financial services | 1981 |
| Henlay Group Ltd | Extraterritorial | 2021 |
| Henlay Hoose Ltd | Real estate | 2021 |
| Henley Station Limited | Real estate | 2015 |
| Henley Village Montessori Nursery School Limited | Education | 2016 |
| Henvi Surfacing Limited | Construction | 2026 |
| Henwood and Dean Limited | Manufacturing | 2016 |
| Heraeus Medical UK Ltd | Health & social care | 2022 |
| Herbert Logistics Ltd | Wholesale & retail | 2024 |
| Heresy Publishing Limited | Information & communication | 2019 |
| Herewoodclose Limited | Real estate | 2024 |
| Herriman Limited | Professional & scientific | 2025 |
| Hethertons Bakery Limited | Wholesale & retail | 2015 |
| Hewison Farms Limited | Agriculture & fishing | 1964 |
| Hexstone Holdings Limited | Professional & scientific | 2003 |
| Hidden River Solutions Ltd | Hospitality | 2021 |
| High Flying Events Crew Ltd | Administrative & support | 2020 |
| High Score Arcades Limited | Other services | 2021 |
| Highclere Castle Horse Feeds Limited | Wholesale & retail | 2010 |
| Highclere Castle Media Limited | Arts & recreation | 2021 |
| Highclere Castle Trustee 1 Limited | Administrative & support | 2025 |
| Highclere Castle Trustee 2 Limited | Administrative & support | 2025 |
| Highclere Enterprises LLP | | 2003 |
| Highclere Homes Ltd | Construction | 2026 |
| Highclere Motor Company Garage Limited | Wholesale & retail | 2005 |
| Highclere Nominated Partner Limited | Professional & scientific | 2007 |
| Highclere Stud Limited | Administrative & support | 1978 |
| Highclere Thoroughbred Racing Limited | Administrative & support | 1992 |
| Highclere Tree Works Ltd | Administrative & support | 2022 |
| Highclere Valley Limited | Hospitality | 2026 |
| Highclere Wealth Limited | Financial services | 2012 |
| Highcross Group Limited | Real estate | 1994 |
| Highlands Cinemas Ltd | Information & communication | 2025 |
| Highnett Limited | Manufacturing | 1994 |
| Hillen’S Kitchen Ltd | Hospitality | 2024 |
| Hillier & Jones Ltd | Construction | 2026 |
| Hillier & Wilson Limited | Real estate | 2015 |
| Hillmark Limited | Construction | 1992 |
| Hills and Country Limited | Real estate | 2015 |
| Hills Racing Limited | Arts & recreation | 2026 |
| Hillsden Court Management Limited | Households | 2018 |
| Hillview House (Newbury) Management Company Limited | Households | 2014 |
| Hillview Windows Limited | Construction | 2010 |