| Hi-Tec Rail Limited | Transport & logistics | 2018 |
| Hi-Tech Scaffolding and Waste Services UK Ltd | Water & waste | 2023 |
| Hicce Investments Ltd | Real estate | 2018 |
| Hicks Candles Ltd | Manufacturing | 2020 |
| Hicks Surgery Ltd. | Health & social care | 2011 |
| Hidris UK Ltd | Wholesale & retail | 2019 |
| Higbee Aeronautics Ltd | Manufacturing | 2025 |
| High Directions Limited | Information & communication | 2009 |
| High Oak Groundwork Ltd | Construction | 2022 |
| High Timber Limited | Administrative & support | 2007 |
| High VIZ Media (Group) Limited | Information & communication | 2017 |
| High VIZ Media Limited | Extraterritorial | 2021 |
| Highcross Holdings Limited | Hospitality | 2025 |
| Highdown Hortus Ltd | Administrative & support | 2024 |
| Highflyer Productions Limited | Health & social care | 2020 |
| Highgrove Designer Homes Limited | Construction | 2002 |
| Highgrove Woodchurch Limited | Construction | 2021 |
| Highland Holiday Cottages Ltd | Hospitality | 2021 |
| Highline Care Ltd | Health & social care | 2024 |
| Highline Design & Build Ltd | Construction | 2021 |
| Highline Roofing Contractors Limited | Construction | 2021 |
| Highman Homes Ltd | Real estate | 2025 |
| Highrise Energy Limited | Construction | 2023 |
| Hightrees Private Limited | Real estate | 2019 |
| Highway Trader Ltd | Construction | 2013 |
| Highworth Grammar School Trust | Education | 2010 |
| Hilary's HUT CIC | Health & social care | 2025 |
| Hilden Brothers Bespoke Landscaping Ltd | Administrative & support | 2026 |
| Hilden Properties Kent Ltd | Real estate | 2018 |
| Hildenborough Volvo | | 1997 |
| Hilgers Solutions Ltd | Information & communication | 2018 |
| Hill Common Property Limited | Real estate | 2023 |
| Hill Court (Charing) Limited | Households | 1985 |
| Hill Hire Taxis Limited | Transport & logistics | 2020 |
| Hillcrest Accounting Limited | Professional & scientific | 2026 |
| Hillcrest Enterprises South Limited | Professional & scientific | 2008 |
| Hillcrest Revision Courses Limited | Education | 2012 |
| Hills Property Services Ltd | Construction | 2017 |
| Hillwood House Investments Ltd | Real estate | 2018 |
| Himalaya Properties Limited | Real estate | 2025 |
| Himalayan Bros Limited | Wholesale & retail | 2015 |
| Hind Court Chambers Ltd | Professional & scientific | 2011 |
| Hinges and Brackets Trading LLP | | 2007 |
| Hinxhill Estate Farms LLP | | 2026 |
| Hinxhill Estate LLP | | 2018 |
| Hinxhill Holdings Limited | Real estate | 2024 |
| Hiofu Limited | Information & communication | 2025 |
| Hippo Project Management Limited | Construction | 2022 |
| HIS & Hers Attraction Ltd | Other services | 2020 |
| History Walks Ltd | Extraterritorial | 2012 |
| Hitch Films Limited | Information & communication | 2025 |
| Hitech Learning & Education Ltd | Education | 2019 |
| Hive to Home Ltd | Wholesale & retail | 2025 |
| Hixford 1 Limited | Other services | 2023 |
| Hixford Holdings Limited | Financial services | 2023 |
| HJD Installations Limited | Information & communication | 2016 |
| HJN01 Ltd | Arts & recreation | 2014 |
| HK Data Ltd | Information & communication | 2021 |
| HK Distributors Limited | Wholesale & retail | 2024 |
| HK Golden Pearl Limited | Hospitality | 2020 |
| Hkpg Ltd | Real estate | 2026 |
| HL Maintenance Ltd | Manufacturing | 2019 |
| HLO Brickwork & Landscapes Limited | Construction | 2020 |
| HLP Construct Limited | Construction | 2025 |
| HLP Invest Limited | Financial services | 2025 |
| HM Advisory (London) Ltd | Professional & scientific | 2020 |
| HM Assets & Estates Ltd | Real estate | 2018 |
| HM Carlton Forest Ltd | Energy | 2017 |
| HM Hillside Ltd | Real estate | 2021 |
| Hmffr Ltd | Administrative & support | 2016 |
| HMS Associates Ltd | Extraterritorial | 2013 |
| HMS Electrical Contractors Limited | Construction | 2005 |
| HNH Recruitment Ltd | Administrative & support | 2023 |
| Hobbs Advisory Ltd | Professional & scientific | 2018 |
| Hobbs Parker 1850 LLP | | 2005 |
| Hobbs Parker 2011 LLP | | 2011 |
| Hobbs Parker Auctioneers LLP | | 2005 |
| Hobbs Parker Car Auctions LLP | | 2005 |
| Hobbs Parker Estate Agents LLP | | 2005 |
| Hobbs Parker Property Consultants LLP | | 2005 |
| Hobbs Parker Ventures Limited | Financial services | 2010 |
| HOC Property Holdings Ltd | Real estate | 2024 |
| Hodders (Egham) Limited | Real estate | 2008 |
| Hodders Partnership LLP | | 2015 |
| Hodges Building and Maintenance LLP | | 2018 |
| Hoford Mortgage Solutions Limited | Administrative & support | 2016 |
| Hold Harbour Limited | Real estate | 2026 |
| Holdsworth Cable Communications Installations Ltd | Information & communication | 2018 |
| Holistic Care Services Limited | Health & social care | 2009 |
| Hollingsbee Consulting Limited | Professional & scientific | 2024 |
| Holloway Electrical Kent Ltd | Construction | 2025 |
| Holly Court (ST. Andrews) Management Company Limited | Real estate | 1991 |
| Hollyer's Heating Limited | Construction | 2021 |
| Hollyer's Houses Limited | Real estate | 2021 |
| Hollym Leisure Ltd | Households | 2021 |
| Hollypark Construction Limited | Construction | 2011 |
| Hollypark Estates Limited | Real estate | 1989 |
| Hollytree (London) Limited | Construction | 1994 |
| Hollywood Nails (Ashford) Ltd | Other services | 2021 |
| Holmhurst Property Management Company Limited | Households | 2014 |