| Hillside View Investments Limited | Real estate | 2023 |
| Hillview (Reigate) Management Company Limited | Households | 2005 |
| Hilsum & Co Ltd | Administrative & support | 2016 |
| Himchuli Ltd | Hospitality | 2025 |
| Hindsight Software Limited | Information & communication | 2012 |
| Hinterland Pictures Ltd | Information & communication | 2018 |
| Hinton & Charlotte Road (Wallington) Management Co. Limited | Real estate | 1976 |
| Hinton Court Management Company Limited | Real estate | 1982 |
| Hird Consulting Limited | Professional & scientific | 2006 |
| Hired Assets Ltd | Administrative & support | 2024 |
| Hisarlaka Security Ltd | Administrative & support | 2017 |
| Hivik Retail Ltd | Wholesale & retail | 2022 |
| HJA Developments Limited | Real estate | 2019 |
| HK Grateful Kitchen Ltd | Hospitality | 2024 |
| HL Real Estate Limited | Real estate | 2025 |
| HLK International Ltd | Arts & recreation | 2025 |
| HMH Couture Ltd | Manufacturing | 2011 |
| HNH Mechanical Ltd | Construction | 2015 |
| Hobbledown Bay Ltd | Arts & recreation | 2023 |
| Hobbledown Limited | Arts & recreation | 2011 |
| Hobbledown West London Limited | Arts & recreation | 2015 |
| Hobkirk Ltd | Professional & scientific | 2015 |
| Hobson Tree Services Ltd | Agriculture & fishing | 2024 |
| Holcha Ltd | Financial services | 2022 |
| Hold Store Limited | Professional & scientific | 2014 |
| Holland Close Limited | Households | 2018 |
| Hollen Plus LLP | | 2023 |
| Holley UK Holdings Limited | Financial services | 2023 |
| Hollyriver Property Management Limited | Households | 2001 |
| Holman Court Residents Limited | Administrative & support | 1989 |
| Holsart Close Management Company Limited | Households | 1999 |
| Holy Tunes Kids Ltd | Wholesale & retail | 2026 |
| Home Design Surrey Ltd | Professional & scientific | 2014 |
| Home Develop Ltd | Construction | 2019 |
| Home Ec.Direct Ltd | Information & communication | 2004 |
| Home Farm House (Esher) Limited | Households | 1988 |
| Home Park (Kingston) Residents Association Limited | Households | 1958 |
| Home-Start Epsom, Ewell & Banstead | Health & social care | 2013 |
| Homecactus Ltd | Wholesale & retail | 2022 |
| Homefield Park (Freehold) Sutton Company Limited | Households | 2007 |
| Honeycomb London Ltd | Construction | 2019 |
| Honeys Scaffolding Ltd | Construction | 2022 |
| Honnest Limited | Information & communication | 2025 |
| Hooks Building Services Limited | Construction | 2005 |
| Hope Valley Property Group Ltd | Households | 2024 |
| Hope Valley Property Management Ltd | Real estate | 2025 |
| Hops and Botanicals Ltd | Wholesale & retail | 2020 |
| Horatio Winston Investments Limited | Real estate | 2026 |
| Hored Holdings Limited | Financial services | 2024 |
| Horizon Apparel Ltd | Wholesale & retail | 2022 |
| Horizon Saas Limited | Wholesale & retail | 2019 |
| Horizon Solutions Ltd | Administrative & support | 2024 |
| Horse Box & Coffee Limited | Hospitality | 2025 |
| Horton Global Ltd | Professional & scientific | 2012 |
| Horton Heights (Epsom) Residents Management Company Limited | Households | 2019 |
| Horton Retail Estate Management Company Limited | Households | 2008 |
| Horton Rose Limited | Administrative & support | 2021 |
| Hot and WET Property Services Limited | Construction | 2025 |
| Hot Smoke Machines and Demonstrations Ltd | Administrative & support | 2022 |
| Hotel Supplies Ltd | Wholesale & retail | 2005 |
| Hourglass Consultancy Limited | Professional & scientific | 2018 |
| House & Hedge Gardening Services Ltd | Administrative & support | 2026 |
| House and Hedge Ltd | Construction | 2026 |
| House Bars Ltd. | Hospitality | 2005 |
| House Cleaning London Ltd | Other services | 2008 |
| House Coin Ltd | Real estate | 2016 |
| House of ADV Ltd | Education | 2025 |
| House of Edge Limited | Wholesale & retail | 2022 |
| House of Gilbert Ltd | Real estate | 2026 |
| House of Ideas (Holdings) Ltd | Financial services | 2024 |
| House of Music and Entertainment Ltd | Administrative & support | 2022 |
| House of Red Ltd | Professional & scientific | 2023 |
| House of Surrey Limited | Construction | 2005 |
| House of Yorke Limited | Information & communication | 2005 |
| Houses of Joseph Ltd | Health & social care | 2024 |
| Howard Maclennan Ltd | Other services | 2012 |
| Howell Services Limited | Households | 2003 |
| Howlett Associates Water Treatment Limited | Professional & scientific | 2001 |
| Howling OWL Ltd | Hospitality | 2020 |
| Howling Tempest Ltd | Information & communication | 2010 |
| Howstan Holdings (Birmingham) Limited | Financial services | 1970 |
| Hoymor Limited | Construction | 2019 |
| HP Holdings (UK) Limited | Extraterritorial | 2009 |
| HP Plumbing Services Ltd | Construction | 2015 |
| HQ People Solutions Ltd | Professional & scientific | 2022 |
| HR Contracts Inc Ltd | Construction | 2019 |
| HR Pillar Ltd | Administrative & support | 2023 |
| HRE Controls Ltd | Professional & scientific | 2012 |
| Hrhs Pivot Solutions Ltd | Professional & scientific | 2025 |
| HS Epsom Limited | Real estate | 2014 |
| HSI Consulting Ltd | Professional & scientific | 2017 |
| Htsuk Limited | Information & communication | 2019 |
| Huaynapotosi Limited | Professional & scientific | 2017 |
| Huggins Edwards & Sharp LLP | | 2015 |
| Huggins Stuart Edwards Commercial Limited | Households | 2019 |
| Human Focus International Limited | Professional & scientific | 1993 |
| Human Sense Design Ltd | Information & communication | 2011 |
| Hummingbird Labs Ltd | Information & communication | 2024 |
| Hummings Part Two Limited | Hospitality | 2023 |
| Hundreds House Management Company Limited | Households | 2022 |