| Hazelr DEV Ltd | Construction | 2025 |
| Hazelson DEV Ltd | Construction | 2025 |
| Hburg-Engineering Limited | Administrative & support | 2019 |
| Hcl(Holistic Care ) Ltd | Health & social care | 2018 |
| HCR Tech Limited | Wholesale & retail | 2010 |
| HDL Enterprises Ltd. | Extraterritorial | 2011 |
| Headboards by Design Limited | Wholesale & retail | 2004 |
| Heal-I-D Counselling Limited | Public administration | 2025 |
| Healteam Limited | Professional & scientific | 2021 |
| Health Chick Limited | Health & social care | 2017 |
| Health Renew Limited | Other services | 2017 |
| Health Wealth Care Services Agency Ltd | Administrative & support | 2019 |
| Health Wealth Care Services Ltd | Health & social care | 2018 |
| Healthora Care Group Ltd | Health & social care | 2025 |
| Healthxy Limited | Health & social care | 2024 |
| Healthy Harmony Limited | Hospitality | 2025 |
| Heartfelt Lens Ltd | Professional & scientific | 2025 |
| Heartmeister Limited | Health & social care | 2015 |
| Heat Flow Solution Plumbing and Heating Ltd | Construction | 2025 |
| Heat Plumb & Drain Estates Ltd | Real estate | 2025 |
| Heat Plumb Drain Ltd | Construction | 2009 |
| Heathen Fire Ltd | Construction | 2023 |
| Heatherdale Healthcare Limited | Health & social care | 2005 |
| Heatherdale Nursing Home Limited | Health & social care | 2015 |
| Heathfield Healthcare Limited | Health & social care | 2015 |
| Heathfield Wear Ltd | Wholesale & retail | 2026 |
| Heatley Limited | Construction | 2019 |
| HED Holdings Limited | Real estate | 2017 |
| Hedgemore Consulting Limited | Professional & scientific | 2004 |
| Heduca Awareness C.I.C. | Health & social care | 2025 |
| Heidari Ltd | Wholesale & retail | 2024 |
| Heidi Wells Consulting Limited | Administrative & support | 2006 |
| Helen COX Marketing Limited | Other services | 2016 |
| Helmuts Limited | Financial services | 2022 |
| Help Save Lives Limited | Education | 2018 |
| Helping Hands Support Care Ltd | Health & social care | 2025 |
| Helyar Marketing Limited | Professional & scientific | 2024 |
| HEM Clinical Ultrasound Service Limited | Health & social care | 2014 |
| Hemnani Estates (SPV3) Limited | Real estate | 2023 |
| Hempstead Fire Protection Ltd | Construction | 2018 |
| Henadrin Electrics Ltd | Construction | 2025 |
| Henderson Trading (Kent) Limited | Wholesale & retail | 2024 |
| Henley Construct Limited | Construction | 2008 |
| Henmay DEX Limited | Other services | 2013 |
| Henry Reeves & Co Medway Limited | Professional & scientific | 2017 |
| Henry's Brickwork Ltd | Construction | 2019 |
| Hensman Automotive Limited | Wholesale & retail | 2023 |
| Hephzibah and Beulah Ltd | Health & social care | 2024 |
| Heptinstall Management Services Ltd | Construction | 2024 |
| Herbal Earth Limited | Health & social care | 2019 |
| Here-To-Serve (HTS) Care Ltd | Health & social care | 2023 |
| Heritable Development Finance Limited | Financial services | 2013 |
| Heritage Bloom Limited | Real estate | 2016 |
| Heritage House Management Services 2011 Ltd | Real estate | 2011 |
| Heritage Oaks Ltd | Real estate | 2024 |
| Heritageford Ltd | Wholesale & retail | 2019 |
| Hero Machine Ltd | Professional & scientific | 2009 |
| Heskex Ltd | Administrative & support | 2024 |
| Hesway Limited | Manufacturing | 1968 |
| Hexagon PM Ltd | Real estate | 2023 |
| Heyfiesta Ltd | Information & communication | 2014 |
| Heywood Capital Partners Limited | Construction | 2017 |
| Heywood Estates (SPV1) 1 Ashford Yard, BN21 3UA Limited | Real estate | 2022 |
| Heywood Estates (SPV2) 20 Ashford Yard, BN21 3UA Limited | Real estate | 2022 |
| Heywood Estates Group Limited | Financial services | 2022 |
| Heywood Property Services Ltd | Real estate | 2021 |
| HFJ Online Shop Ltd | Wholesale & retail | 2023 |
| HGA Property Group Ltd | Real estate | 2024 |
| HGE Brothers Ltd | Financial services | 2025 |
| HGE Field Engineering Ltd | Construction | 2016 |
| HGV Global Limited | Professional & scientific | 2022 |
| HH Travel Group Limited | Transport & logistics | 2025 |
| Hhdkitchensandbathrooms Ltd | Construction | 2022 |
| HI Investments Ltd | Real estate | 2018 |
| Hibau Developments Limited | Real estate | 2019 |
| Hibau Group Limited | Construction | 2019 |
| Hibau Living Limited | Construction | 2018 |
| Hietex Party World Ltd | Other services | 2025 |
| High Frequency Installations Ltd | Construction | 2022 |
| High Links Resources Limited | Wholesale & retail | 2020 |
| High Street EPC Limited | Professional & scientific | 2018 |
| Higham Park UK Ltd. | Construction | 2012 |
| Highland Outsourcing Limited | Information & communication | 2021 |
| Highview Glazing & Construction Limited | Construction | 2016 |
| Highview Holds Limited | Real estate | 2025 |
| Hill Top Cars Ltd | Wholesale & retail | 2024 |
| Hillcrest Capital Management Limited | Financial services | 2019 |
| Hillmans Property Group Ltd | Real estate | 2026 |
| Hilltop Haven Limited | Real estate | 2025 |
| Hiltech Media Solutions Ltd | Professional & scientific | 2021 |
| Hilton Projects 2001 Limited | Professional & scientific | 2001 |
| Hinesite Distribution Limited | Administrative & support | 2009 |
| HIS Influence Church Ltd | Other services | 2019 |
| Historic Dockyard Property (2005) Limited | Real estate | 2005 |
| Historic Dockyard Property (2010) Limited | Real estate | 2010 |
| Historic Dockyard Property Limited | Real estate | 1988 |
| Hitchunn Property Limited | Real estate | 2025 |
| Hive & Co Event Space Ltd | Arts & recreation | 2026 |
| Hive Restaurants Ltd | Hospitality | 2020 |
| HJR Projects Kent Limited | Construction | 2018 |