| Hanworth Rooftop Lounge Ltd | Hospitality | 2026 |
| Happy Jane Limited | Real estate | 2020 |
| Hard Concrete Ltd | Administrative & support | 2017 |
| Hardcoresoftware Limited | Information & communication | 2012 |
| Hari Rama Limited | Wholesale & retail | 2023 |
| Harihar Yadav Ltd | Construction | 2020 |
| Hariharasuta IT Solutions Limited | Information & communication | 2026 |
| Haris Naseer Ltd | Wholesale & retail | 2025 |
| Harlington Electrical Service Ltd | Construction | 2016 |
| Harlington High Street Limited | Construction | 2022 |
| Harpentry Ltd | Construction | 2024 |
| Harrian Holdings Ltd | Households | 2024 |
| Harris Financial Ltd | Financial services | 2023 |
| Harrismx Ltd | Construction | 2019 |
| Harrison Executive Travel Limited | Transport & logistics | 2015 |
| Harsimran Properties Ltd | Real estate | 2014 |
| Haseeb Motors London Ltd | Extraterritorial | 2020 |
| Hashmiz Ltd | Wholesale & retail | 2021 |
| Hashtech Innovation Ltd | Wholesale & retail | 2025 |
| Hatton Kross Limited | Professional & scientific | 2011 |
| Haulageman Ltd | Manufacturing | 2018 |
| HAUS23 Property Services Ltd | Real estate | 2022 |
| Havensource Ltd | Real estate | 2024 |
| Hawthorn Residential Management RTM Company Limited | Households | 2020 |
| Hayati Care Ltd | Health & social care | 2024 |
| Haymill Services UK Limited | Energy | 2018 |
| Hayyat Traders Limited | Hospitality | 2014 |
| HCA Healthcare Services (UK) Limited | Administrative & support | 2023 |
| HCC Properties Ltd | Real estate | 2022 |
| HD Carpet Ltd | Wholesale & retail | 2025 |
| HD Construction Group Ltd | Construction | 2025 |
| HDJ Ltd | Health & social care | 2013 |
| HDR Test Ltd | Construction | 2026 |
| Health and Lifestyle Solutions Limited | Administrative & support | 2026 |
| Healthlife Ltd | Professional & scientific | 2024 |
| Healthy 4 Life Limited | Wholesale & retail | 2014 |
| Heart Crafted Company Ltd | Wholesale & retail | 2020 |
| Heartful Healing Ltd | Health & social care | 2020 |
| Heat Pump Hero Ltd | Education | 2023 |
| Heathrow Car World Ltd | Wholesale & retail | 2023 |
| Heathrow Haulage Ltd | Transport & logistics | 2023 |
| Heathrow Hoppers Ltd | Transport & logistics | 2024 |
| Heavenly Interiors Ltd | Construction | 2025 |
| Hedges Close Management Company Limited | Households | 2013 |
| Heer Haus Ltd | Wholesale & retail | 2025 |
| Helen's Hair (Ashford) Ltd | Other services | 2025 |
| Helix IT Services Ltd | Extraterritorial | 2016 |
| Hellobuyers Ltd | Wholesale & retail | 2021 |
| HELP2MIGRATE Services Limited | Professional & scientific | 2024 |
| Henryk Ultra Decorating Ltd | Construction | 2023 |
| Henu Exim UK Ltd | Wholesale & retail | 2018 |
| Herit Group Limited | Manufacturing | 2023 |
| Heritage Wardrobe Group Limited | Manufacturing | 2023 |
| Heritage Wardrobe Limited | Wholesale & retail | 2023 |
| Hero Humata Ltd | Professional & scientific | 2025 |
| Hesed for Communities CIC | Administrative & support | 2023 |
| Hetvik Property Investments Ltd | Real estate | 2024 |
| HFD Chauffeurs Ltd | Transport & logistics | 2026 |
| HH UK Corporation Ltd | Wholesale & retail | 2019 |
| HHC Builders Ltd | Construction | 2018 |
| HI Excel Limited | Wholesale & retail | 2008 |
| HIA Cyber Ltd | Information & communication | 2025 |
| Hidden Villas 1 Ltd | Real estate | 2025 |
| Hidden Villas 2 Ltd | Real estate | 2025 |
| Hidden Villas 3 Ltd | Real estate | 2025 |
| Hidden Villas 4 Ltd | Real estate | 2025 |
| Hidden Villas 5 Ltd | Real estate | 2025 |
| Hidden Villas 6 Ltd | Real estate | 2025 |
| Hidden Villas Ltd | Real estate | 2025 |
| High Tones UK Limited | Wholesale & retail | 2011 |
| Highland Redstone Ltd | Wholesale & retail | 2023 |
| Highly Decorated Limited | Construction | 2024 |
| Hill Crest Healthcare Services Limited | Administrative & support | 2020 |
| Hinerti Limited | Professional & scientific | 2014 |
| Hire Investments Limited | Other services | 2021 |
| Hitvocals Limited | Administrative & support | 2024 |
| Hive Residency Ltd | Real estate | 2024 |
| Hiya Advisory Limited | Information & communication | 2018 |
| HJ Interiors Limited | Manufacturing | 2018 |
| HJ Securities Ltd | Administrative & support | 2025 |
| HK Sapra Ltd | Wholesale & retail | 2019 |
| HKS Logistics Solutions Ltd | Transport & logistics | 2018 |
| HL Consultants Ltd | Professional & scientific | 2025 |
| Hlrc Staines Ltd | Information & communication | 2025 |
| Hmshost UK Limited | Administrative & support | 1998 |
| HMX Estates Limited | Real estate | 2024 |
| HNA Ltd | Other services | 2025 |
| Hogan’S Hero’S Ltd | Wholesale & retail | 2019 |
| Hogarth Services Group Ltd | Construction | 2024 |
| Holistic Care and Training C.I.C. | Health & social care | 2020 |
| Hollis and Tate Ltd | Construction | 2024 |
| Holly Residential Management RTM Company Limited | Households | 2020 |
| Holtech Systems Ltd | Construction | 2022 |
| Homecrew Limited | Real estate | 2025 |
| Homehaven Solutions Ltd | Wholesale & retail | 2025 |
| Homes 4 Future Ltd | Construction | 2024 |
| Hoofprints Technologies Ltd | Hospitality | 2016 |
| Horizon Construction Advisory Ltd | Professional & scientific | 2025 |
| Horizon Hospitality Group (HG) Limited | Hospitality | 2026 |
| Horizon Key Ltd | Real estate | 2025 |