| Heppners (UK) Ltd | Construction | 2014 |
| Herbert Pool Limited | Wholesale & retail | 2019 |
| Herbithera Ltd | Wholesale & retail | 2025 |
| Hermes Glow London Limited | Manufacturing | 2020 |
| Heron Court (Sandhurst) Management Company Limited | Households | 2004 |
| Heron Mansions Limited | Real estate | 2015 |
| Herwellness Ltd | Health & social care | 2025 |
| Hesi Solutions Ltd | Information & communication | 2024 |
| HESTIA21 Ltd | Real estate | 2017 |
| Hettigoda Industries UK Limited | Professional & scientific | 2015 |
| HGM Assistant Ltd | Administrative & support | 2024 |
| HHA Limited | Professional & scientific | 2012 |
| Hhopkins Ltd | Construction | 2024 |
| Hi-Res Security Limited | Administrative & support | 2008 |
| Hiberly Ltd | Information & communication | 2019 |
| High Ridding Flats Limited | Households | 1979 |
| High Tech Choice Limited | Wholesale & retail | 2010 |
| Highams Saaz Group Limited | Professional & scientific | 2021 |
| Highams Saaz LLP | | 2018 |
| Highfield Court Twyford Gardens Limited | Households | 1961 |
| Highground Estates Ltd | Real estate | 2014 |
| Highground Lettings Management Ltd | Real estate | 2013 |
| Highline HPC Ltd | Information & communication | 2026 |
| Highway Management Limited | Households | 2008 |
| Hilgrove House Residents Co Limited | Real estate | 2002 |
| Hilink Limited | Construction | 2024 |
| Hill House (Esher) Management Co Ltd | Households | 2012 |
| Hill's Boot Stores Limited | Real estate | 2015 |
| Hillmoore Fire Protection Limited | Construction | 2006 |
| Hillsborough Amenity Limited | Hospitality | 2005 |
| Hillside Landscape Services Limited | Administrative & support | 2014 |
| HIP2TOE Ltd | Health & social care | 2014 |
| Hiper Global UK Ltd | Information & communication | 2001 |
| Hirestore Ltd | Wholesale & retail | 2022 |
| Hjpf LLP | | 2021 |
| Hksy Limited | Wholesale & retail | 2024 |
| HM Assets Ltd | Real estate | 2020 |
| HM Cooper Limited | Households | 2025 |
| Hmak Ltd | Information & communication | 2018 |
| HN United Engineering Ltd | Wholesale & retail | 2024 |
| HNE Property Ltd | Financial services | 2023 |
| Hntly Limited | Arts & recreation | 2025 |
| Hoarding Disorders UK (South) CIC | Other services | 2023 |
| Hobbs Granger Roitt LLP | | 2007 |
| Hogg Consulting Limited | Professional & scientific | 2007 |
| Hollister Europe Limited | Manufacturing | 1989 |
| Hollister Services Limited | Administrative & support | 2000 |
| Holly Cottage Day Nursery Limited | Education | 1998 |
| Holly Leaf Consulting Limited | Information & communication | 2011 |
| Hollybush Lettings Limited | Real estate | 2024 |
| Holme Grange Limited | Education | 1967 |
| Holmlea Road (Datchet) Management Company Limited | Real estate | 1986 |
| Home BRU Cafe Limited | Hospitality | 2025 |
| Home Choice Developments Ltd | Real estate | 2008 |
| Home Farm (South) Limited | Agriculture & fishing | 2020 |
| Home Marketing Group Ltd | Professional & scientific | 2015 |
| Home Marketing Holdings Ltd | Financial services | 2021 |
| Home of Hmos Ltd | Real estate | 2026 |
| Home Sense Company Ltd | Manufacturing | 2009 |
| Home Shine Hereford Limited | Administrative & support | 2026 |
| Home Stairlifts Ltd | Wholesale & retail | 2022 |
| Home-Start Wokingham District | Health & social care | 2005 |
| Homeflow Limited | Information & communication | 2005 |
| Homegrowing Limited | Extraterritorial | 2023 |
| Homeleigh Residents Management Limited | Households | 2026 |
| Homemade Digital Limited | Information & communication | 2008 |
| Homes & Hearts Limited | Health & social care | 2023 |
| Homes by M&J Limited | Construction | 2024 |
| Homes Property Services (UK) Limited | Real estate | 2012 |
| HOMES4U Property Ltd | Real estate | 2021 |
| Homex Property Services Ltd | Construction | 2021 |
| Honeey Bird Technologies Limited | Information & communication | 2022 |
| Honey Heart Bakehouse Ltd | Manufacturing | 2026 |
| Honeycomb Creations Limited | Professional & scientific | 2021 |
| Honeycomb HR Limited | Information & communication | 2020 |
| Hong Kong Cultural Heritage CIC | Administrative & support | 2026 |
| Honour Apparel Limited | Wholesale & retail | 2020 |
| Hopenox Ltd | Real estate | 2025 |
| Horizon Consult Limited | Professional & scientific | 2024 |
| Horizon Currency Ltd | Financial services | 2018 |
| Horizon Gaming Services Limited | Administrative & support | 2022 |
| Horizon UK Tax Solutions Limited | Professional & scientific | 2023 |
| Horizoncars Ltd | Wholesale & retail | 2025 |
| Horizongot Limited | Wholesale & retail | 2025 |
| Horndale Solutions Limited | Information & communication | 2015 |
| Horseguard Investments Limited | Real estate | 2023 |
| Hortins Limited | Financial services | 2011 |
| Horton Grange (Management) Limited | Households | 1987 |
| Horton Leisure Limited | Administrative & support | 2001 |
| Hosanna Technology Limited | Information & communication | 2024 |
| Hosting Techniques Limited | Information & communication | 2013 |
| Hotnog Builders Ltd | Construction | 2022 |
| Hound Content & Media Limited | Information & communication | 2015 |
| Houndalert Ltd | Information & communication | 2026 |
| House of Creativity Ltd | Professional & scientific | 2018 |
| House of Stafford Limited | Professional & scientific | 2026 |
| Houseman Properties Ltd | Administrative & support | 2017 |
| Housing Services CIC | Real estate | 2023 |
| Howarth Winterbrook (Foods) Limited | Manufacturing | 1986 |
| Howcroft Garden Services Limited | Other services | 2010 |