| Harihara Photogrammetry Ltd | Professional & scientific | 2025 |
| Harman Homes and Holidays Ltd | Hospitality | 2026 |
| Harmer Gallery Ltd | Wholesale & retail | 2022 |
| Harmer Investments Limited | Real estate | 2013 |
| Harmer INVESTMENTS18 Limited | Administrative & support | 2014 |
| Harmoniz Global Limited | Administrative & support | 2020 |
| Harrells Fertilizer Ltd | Extraterritorial | 2019 |
| Harriette Brookes Holdings Ltd | Financial services | 2021 |
| Harris & Brown Limited | Hospitality | 2017 |
| Harrisons Residential Limited | Real estate | 2016 |
| Harrys Kebabs (Welling) Ltd | Hospitality | 2024 |
| Hart Co Leisure Ltd | Wholesale & retail | 2006 |
| Hartley James Limited | Professional & scientific | 2025 |
| Hartlip Driving School Ltd | Education | 2025 |
| Hartlip Group Limited | Transport & logistics | 2025 |
| Hartlip HGV Driving School Ltd | Education | 2022 |
| Hartlipwest Management Services Limited | Construction | 2022 |
| Harvey Burton Property Investments Ltd | Real estate | 2024 |
| Harwood Mechanical Services Ltd | Construction | 2020 |
| Haseeb Hasan Ltd | Health & social care | 2015 |
| Hashim Barber Kent Ltd | Other services | 2025 |
| Hasm Healthcare Limited | Health & social care | 2013 |
| Hastings Fitness Limited | Arts & recreation | 2018 |
| Hattily Cost and Commercial Ltd. | Administrative & support | 2013 |
| Hatton Mechanical Ltd | Professional & scientific | 2021 |
| Hausi Medway Limited | Real estate | 2023 |
| Hawkins Homes Limited | Real estate | 2016 |
| Hawkins Property Investments Limited | Extraterritorial | 2016 |
| Hawkridge & Company LLP | | 2010 |
| Hawlader Kingdom Ltd | Wholesale & retail | 2020 |
| Hawthorn Avenue (Gillingham) Management Limited | Extraterritorial | 2009 |
| Hawthorn Eyecare Ltd | Financial services | 2023 |
| Hawtree & Sons Ltd | Wholesale & retail | 2025 |
| Hayley’S Place Ltd | Real estate | 2019 |
| Haytec Services Limited | Construction | 2014 |
| Hayward R Limited | Wholesale & retail | 2016 |
| HAZ Chem UK Ltd | Administrative & support | 2015 |
| Hazel Sheldrake Limited | Administrative & support | 2017 |
| Hazrat ALI Ltd | Wholesale & retail | 2025 |
| HC Supplements Ltd | Wholesale & retail | 2018 |
| Hcfix Limited | Construction | 2013 |
| HD MM Cambridge Ltd | Hospitality | 2025 |
| HDC Consults Limited | Administrative & support | 2025 |
| HDF Services Limited | Hospitality | 2023 |
| HDL CAD Solutions Limited | Professional & scientific | 2022 |
| Headline Barber Gillingham Limited | Other services | 2024 |
| Headtrax Solutions Limited | Information & communication | 2024 |
| Healing Wave Sounds Ltd | Wholesale & retail | 2026 |
| Health NAG UK Limited | Manufacturing | 2023 |
| Healthtracker Ltd | Information & communication | 2010 |
| Healthy HAF 24 Ltd | Wholesale & retail | 2018 |
| Healway Services Limited | Administrative & support | 2025 |
| Heap Wisp Limited | Administrative & support | 2021 |
| Heard Trade Limited | Wholesale & retail | 2025 |
| Heart Centred Consultancy Ltd | Health & social care | 2024 |
| Heart Centred Properties Ltd | Real estate | 2024 |
| Heartline Press Ltd | Information & communication | 2025 |
| Heat Masters Kent Limited | Construction | 2025 |
| Heating Smart Ltd | Construction | 2012 |
| Heatsource Electrical Services LLP | | 2016 |
| Hebditch Property Renovations Limited | Construction | 2005 |
| Hebei Hegang Supply Chain Management Co., Ltd | Manufacturing | 2023 |
| Hebei Mingran Chemical Co., Limited | Wholesale & retail | 2020 |
| Hebei Reliance International Trading Co., Ltd | Manufacturing | 2022 |
| Hebei Yingli Import & Export Co., Ltd | Manufacturing | 2023 |
| Hebei Yuantuo Electromechanical Equipment Manufacturing Co., Ltd | Manufacturing | 2023 |
| Hecken Installations Limited | Construction | 2025 |
| Hedge Point Trading Ltd | Wholesale & retail | 2024 |
| Hedwig 25 Ltd | Construction | 2025 |
| Hefei Qingtao Steel Co., Ltd | Manufacturing | 2025 |
| Hemao Co., Limited | Wholesale & retail | 2024 |
| Hemen Ltd | Manufacturing | 2026 |
| Hempstead Pavilion Playgroup Limited | Education | 2016 |
| Hempstead Therapy Centre Limited | Health & social care | 2018 |
| HEN Weekend Chicken Boarding Ltd | Agriculture & fishing | 2025 |
| Hengda Trading Co., Ltd | Wholesale & retail | 2021 |
| Hengli International Ltd | Wholesale & retail | 2018 |
| Henmol Construction Ltd | Construction | 2022 |
| Henrietta Franklin Properties Ltd | Real estate | 2026 |
| Henry Schein Europe Limited | Financial services | 2001 |
| Henry Schein Limited | Extraterritorial | 1984 |
| Henry Schein One UK Limited | Information & communication | 1994 |
| Henry Schein UK Global Holdings Limited | Financial services | 2020 |
| Henry Schein UK Holdings Limited | Wholesale & retail | 2018 |
| Henry Schein UK Limited | Financial services | 2018 |
| Hephzibah Services Limited | Health & social care | 2019 |
| Hercrown Finance Limited | Professional & scientific | 2025 |
| Hereson Management Limited | Households | 2014 |
| Heritage Property Holdings Limited | Real estate | 1990 |
| Heritage Residential Developments Limited | Real estate | 1976 |
| Heritage Shopping Centres Limited | Real estate | 1991 |
| Herne Hill Books Limited | Wholesale & retail | 2009 |
| Hero Fair Trading Co., Ltd | Wholesale & retail | 2024 |
| Heronn Ltd | Other services | 2026 |
| Hesgram Technologies Ltd | Information & communication | 2024 |
| Heywood Traffic Ltd | Construction | 2023 |
| HFF Ltd | Administrative & support | 2020 |
| HFM Catering Ltd | Hospitality | 2026 |
| HG Services Limited | Construction | 2018 |
| HGB Services Limited | Professional & scientific | 2026 |