| Heavens Hospitality Limited | Hospitality | 2024 |
| Heavens Spices Ltd | Hospitality | 2025 |
| Heavy Lift Trucks UK Ltd | Transport & logistics | 2026 |
| Hecklin Limited | Professional & scientific | 1975 |
| Hector & Vine Ltd | Arts & recreation | 2015 |
| Hector MAY Limited | Real estate | 2022 |
| Hedley's Catering Limited | Hospitality | 2005 |
| Heel 2 Toes Foot Care Ltd | Health & social care | 2020 |
| Heelectrical Solutions Ltd | Construction | 2025 |
| HEH Industries Limited | Construction | 2026 |
| Heightpro Ltd | Other services | 2016 |
| Helcim Group Limited | Extraterritorial | 2011 |
| Helcim Homes Ltd | Extraterritorial | 2012 |
| Helenxp Limited | Professional & scientific | 2024 |
| Helios Technologies Ltd | Information & communication | 2022 |
| Helipebs (Holdings) Limited | Manufacturing | 1922 |
| Helipebs Metal Finishing Ltd | Professional & scientific | 1976 |
| Help for Networks Ltd | Information & communication | 2024 |
| Help to Buy Expert Ltd | Financial services | 2015 |
| Helux Limited | Education | 2012 |
| Hemmings Construction Limited | Construction | 2006 |
| Hemplan Design Limited | Wholesale & retail | 1991 |
| Hempsted Car Wash Limited | Administrative & support | 2022 |
| Hempsted Developments Limited | Construction | 2025 |
| Hempsted IT Limited | Information & communication | 2003 |
| Hempsted Marine Ltd | Manufacturing | 2019 |
| Hempsted Roofing & Building Ltd | Construction | 2003 |
| Hendre Property Ltd | Real estate | 2024 |
| Henley Furniture Limited | Wholesale & retail | 2003 |
| Henley House LLP | | 2018 |
| Henley Property Management Limited | Real estate | 1982 |
| Hennessy Building Group Ltd | Construction | 2021 |
| Henri James Wealth Ltd | Financial services | 2013 |
| Henry Oliver Properties Ltd | Real estate | 2024 |
| Henry Ryder Limited | Real estate | 2011 |
| Henshaws Executive Holdings Limited | Financial services | 2019 |
| Henshaws Executive Travel Limited | Administrative & support | 2007 |
| Henvis Group Ltd | Information & communication | 2024 |
| Hepburn Associates Limited | Professional & scientific | 1998 |
| Hephaestus Craft Limited | Construction | 2025 |
| Herbert Davis Removals Limited | Transport & logistics | 1998 |
| Herbishire Ltd | Health & social care | 2023 |
| Herdwear Ltd | Manufacturing | 2020 |
| Here NOW Adventures Ltd | Administrative & support | 2026 |
| Heritage & Wise Limited | Wholesale & retail | 1961 |
| Heritage Homes & Investments Ltd | Real estate | 2023 |
| Heritage Homes and Living Limited | Construction | 2025 |
| Heritage Sports Supplies Ltd | Wholesale & retail | 2025 |
| Heritage Stone Walls Ltd | Administrative & support | 2024 |
| Heritage Stonecraft Ltd | Construction | 2010 |
| Heritage Traditional Decorating Ltd | Construction | 2024 |
| Heronwood Services Limited | Financial services | 2018 |
| Herridge Group Ltd | Hospitality | 2023 |
| HES Automotive Ltd | Wholesale & retail | 2025 |
| Heshto Service Ltd | Wholesale & retail | 2017 |
| Hessa Legal Services Ltd | Professional & scientific | 2026 |
| Hestia Homewares Ltd | Wholesale & retail | 2020 |
| Hestia Retreats Limited | Real estate | 2022 |
| Hetty's Brownie Bar Ltd | Manufacturing | 2021 |
| Hetty's Kitchen Ltd | Manufacturing | 2018 |
| Hetty's Place Ltd | Hospitality | 2023 |
| Hevone Properties Ltd | Real estate | 2024 |
| HEW Lets Limited | Real estate | 2022 |
| Hewers South West Limited | Construction | 2024 |
| Hexagon (Software) Group Limited | Professional & scientific | 1973 |
| Hexagon Software Solutions Ltd | Professional & scientific | 2004 |
| HEY Pesto Ltd | Hospitality | 2013 |
| HEY Sushi Limited | Hospitality | 2022 |
| HF Life Limited | Financial services | 2013 |
| Hflg Property Limited | Real estate | 2019 |
| HG Wealth Management Ltd | Financial services | 2024 |
| HHJ Boss Hand Car Wash Ltd | Wholesale & retail | 2026 |
| Hhpda (Horses Helping People With Depression and Anxiety) Ltd | Administrative & support | 2017 |
| Hhpda Respite Ltd | Health & social care | 2023 |
| HHS PR Limited | Professional & scientific | 2013 |
| Hi-Tec Fire Group Ltd | Manufacturing | 2017 |
| Hi-Tec Joinery Products Limited | Manufacturing | 2002 |
| Hicks Electrical Solutions Ltd | Construction | 2021 |
| Hicks Property Holdings Limited | Real estate | 2026 |
| Hide Your Cables Ltd | Information & communication | 2025 |
| Hiezebella Ltd | Wholesale & retail | 2023 |
| High Ridge Management Services Ltd | Education | 2005 |
| High Ridge Training Group Ltd | Financial services | 2021 |
| High Ridge Training Ltd | Education | 2014 |
| Highcleeve Limited | Health & social care | 2003 |
| Highfields (Clifton Upon Teme) Management Company Limited | Households | 2022 |
| Highgarth Construction Ltd | Construction | 2025 |
| Highgreen CRT Management Company Limited | Households | 2024 |
| Highleadon Filling Station Limited | Wholesale & retail | 2003 |
| Highnam (Gloucestershire) Management Company Limited | Households | 2018 |
| Highnam Day Nursery Limited | Education | 2003 |
| Highnam Ltd | Administrative & support | 2000 |
| Hilary Newman Clinics Co Ltd | Financial services | 2005 |
| Hilary Newman Treatments Ltd | Health & social care | 2007 |
| Hill Court Farm Research Ltd | Professional & scientific | 2014 |
| Hill Paul Management Limited | Households | 2005 |
| Hill Valley Estates (Glos) Ltd | Real estate | 2025 |
| Hillary Kimutai Care Ltd | Health & social care | 2023 |
| Hillcrest Consult Limited | Information & communication | 2022 |
| Hilleon Limited | Real estate | 1959 |