| Haywood Landscapes EOT Limited | Administrative & support | 2024 |
| Haywood Landscapes Limited | Construction | 1990 |
| Hazel Martin Slimming World Ltd | Health & social care | 2025 |
| Hazyc UK Limited | Health & social care | 2023 |
| HBS Lettings Ltd | Real estate | 2019 |
| HC4L Limited | Extraterritorial | 2020 |
| Hcs&R (Kent) Limited | Manufacturing | 2009 |
| HDA Convenience-Swalecliffe Ltd | Wholesale & retail | 2026 |
| HDA Convenient Limited | Wholesale & retail | 2023 |
| HDA Property Management Ltd | Real estate | 2024 |
| HDS Property Management Limited | Professional & scientific | 2016 |
| Head Kandy Hair Supplies Ltd | Wholesale & retail | 2022 |
| Headquarters One Limited | Other services | 2004 |
| Headsbase Holdings Limited | Professional & scientific | 2025 |
| Headsbase HR Limited | Administrative & support | 2026 |
| Headsbase Limited | Professional & scientific | 2023 |
| Headsbase Retail Limited | Wholesale & retail | 2026 |
| Headwater Labs Limited | Information & communication | 2026 |
| Headway Kent | Other services | 2002 |
| Health and Safety at Work Limited | Professional & scientific | 2004 |
| Healthcare Law Limited | Professional & scientific | 2015 |
| Healthipops Limited | Extraterritorial | 2020 |
| HEAR2HEAR Ltd | Professional & scientific | 2024 |
| Hearnden & Hearnden Limited | Real estate | 2023 |
| Heartwood Coop CIC | Education | 2026 |
| Heaven Scent Home Help and Cleaning Ltd | Other services | 2018 |
| Hebely Bubbly Limited | Construction | 2018 |
| Heli Consultants Limited | Wholesale & retail | 2016 |
| Heliopolis Medical Limited | Health & social care | 2023 |
| Helios Project Management Ltd | Information & communication | 2016 |
| Hellings IT Services Ltd | Information & communication | 2012 |
| Helmsworth Accountax Solutions Ltd | Professional & scientific | 2025 |
| Helmsworth Ltd | Professional & scientific | 2010 |
| Helping Hands Services Ltd | Health & social care | 2021 |
| Hemivra Limited | Real estate | 2026 |
| Henbury Manor Management Limited | Administrative & support | 2011 |
| Henna Francis Ltd | Real estate | 2024 |
| Henzie Limited | Administrative & support | 2018 |
| Heritage Brickwork Restoration Ltd | Construction | 2014 |
| Heritage Brickwork Training Ltd | Education | 2022 |
| Heritage Craft Construction Ltd | Construction | 2015 |
| Heritage Dermatology Ltd | Health & social care | 2025 |
| Heritage Paint Removal and Cleaning Ltd | Construction | 2021 |
| Heritage Sprint Ltd | Administrative & support | 2018 |
| Herne Bay Holdings Limited | Financial services | 2026 |
| Herne Bay Smile Limited | Health & social care | 2026 |
| Herne Management Limited | Households | 2008 |
| Herringbone Kitchens Limited | Manufacturing | 2014 |
| Herringbone Storage Limited | Real estate | 2020 |
| HESS3 Ltd | Health & social care | 2023 |
| Hewitt Smith Ltd | Hospitality | 2025 |
| Heymar Leisure Limited | Hospitality | 2012 |
| Heysmart Limited | Information & communication | 2011 |
| HF Partnership LLP | | 2014 |
| HG Office Limited | Professional & scientific | 2024 |
| HGF Food Outlets Limited | Hospitality | 2026 |
| HI Way Services (UK) Holdings Limited | Administrative & support | 2012 |
| HI Way Topco Limited | Administrative & support | 2026 |
| Hibernating Hedgehog Homes Limited | Real estate | 2019 |
| Hidden Applications Limited | Information & communication | 2012 |
| Hidden Kingdom Limited | Information & communication | 2016 |
| High Builders Ltd | Construction | 2019 |
| High Stakes Properties Ltd | Real estate | 2024 |
| Highborne Limited | Professional & scientific | 2014 |
| Highgate Propco Ltd. | Real estate | 2017 |
| Highland House Residential Home Limited | Health & social care | 2013 |
| Highway Marine Ltd | Wholesale & retail | 1975 |
| Hilderbrand's Removals & Storage Ltd | Transport & logistics | 2018 |
| Hill Fort Capital UK LLP | | 2018 |
| Hill Property Limited | Real estate | 2009 |
| Hill View Gate Limited | Real estate | 2022 |
| Hill-Sidefarm Ltd | Wholesale & retail | 2018 |
| Hillbrow IT Ltd. | Information & communication | 2013 |
| Hillcrest Development Management Limited | Real estate | 2019 |
| Hills Collectives Ltd | Other services | 2020 |
| Hillside Property Group Limited | Construction | 2016 |
| Hillsmith Ltd | Administrative & support | 2025 |
| Hilltop House RTM Company Ltd | Hospitality | 2010 |
| Hilux Homes Ltd | Real estate | 2009 |
| Himalayan and Nepal Arts and Culture Society | Other services | 2013 |
| Himat Limited | Health & social care | 2022 |
| Hinckley Hills Limited | Professional & scientific | 2015 |
| Hines Decorators Ltd | Construction | 2024 |
| Hipath Consulting Limited | Professional & scientific | 2019 |
| Hirwa Ltd | Arts & recreation | 2022 |
| Hithermoor Soil Treatments Limited | Extraterritorial | 1965 |
| Hitplay Ltd. | Information & communication | 2019 |
| Hjpr Capital Ltd | Other services | 2018 |
| Hkghomes Ltd | Hospitality | 2024 |
| Hmdg Limited | Professional & scientific | 2016 |
| HML Engineering Services Limited | Construction | 2013 |
| HNC Collective Ltd | Wholesale & retail | 2022 |
| Hoades Wood Limited | Agriculture & fishing | 2013 |
| Hoangvanminhgb Ltd | Wholesale & retail | 2025 |
| Hoath Management Company Limited | Professional & scientific | 2013 |
| Hobbs Thomas & Company LLP | | 2016 |
| Hold the M Ltd | Financial services | 2026 |
| Holddelicious Limited | Real estate | 2013 |
| Holden Properties Limited | Real estate | 2016 |
| Holdentech Limited | Administrative & support | 2012 |