| Hazari Stores Limited | Wholesale & retail | 2025 |
| HBK Foods Ltd | Hospitality | 2024 |
| Hboparai Ltd | Wholesale & retail | 2025 |
| HBS Management Ltd | Professional & scientific | 2019 |
| HC Mediastore Ltd | Information & communication | 2024 |
| HD SS Trading Ltd | Wholesale & retail | 2026 |
| Health + Care Ltd | Health & social care | 2022 |
| Health Sphere NP Limited | Health & social care | 2025 |
| Health-Edge Skills & Services Ltd | Administrative & support | 2024 |
| Heart and Home Network Ltd | Real estate | 2026 |
| Heart Construction Limited | Construction | 2017 |
| Heart Design & Build Ltd | Professional & scientific | 2020 |
| Heat Network Consultants Ltd | Professional & scientific | 2025 |
| Heathcote Local Ltd | Wholesale & retail | 2026 |
| Heatherfield Chauffeurs Limited | Transport & logistics | 2017 |
| Heathrow Airport Transfers Limited | Transport & logistics | 2017 |
| Heathrow Build and Designs Ltd | Construction | 2015 |
| Heathrow Homes Ltd | Real estate | 2016 |
| Heathrow Limousine Limited | Wholesale & retail | 2024 |
| Heathrow Midland Properties Ltd | Real estate | 2026 |
| Heathrow Parking Spot Ltd | Administrative & support | 2023 |
| Heathrow Plant Sales Limited | Wholesale & retail | 2015 |
| Heathrow Properties Holdings Ltd | Financial services | 2026 |
| Heathrow Properties Ltd | Real estate | 2019 |
| Heathrow Safe Deposit Limited | Administrative & support | 2012 |
| Heathrow Skips Limited | Water & waste | 2025 |
| Heating and Plumbing Services 24/7 Ltd | Construction | 2025 |
| Heaven Design & Build Ltd | Construction | 2023 |
| Heavens Care Ltd | Health & social care | 2017 |
| Heer Fashions Ltd | Wholesale & retail | 2015 |
| Heer Investment Properties Ltd | Real estate | 2018 |
| Heera & Sons Ltd | Real estate | 2025 |
| Heera Property Management Ltd | Real estate | 2022 |
| Heera Property UK Ltd | Real estate | 2025 |
| Hello Bengali Sweets UK Limited | Wholesale & retail | 2024 |
| Hello-Wheelchair-Hire Ltd | Administrative & support | 2026 |
| Help Education & Life Programme | Education | 2016 |
| Hemant Ltd | Construction | 2025 |
| Henna's Salon and Spa Ltd | Other services | 2019 |
| HER Space & Retreat CIC | Education | 2025 |
| Herjot Buttar Limited | Real estate | 2025 |
| Hermes International Developments Limited | Financial services | 2008 |
| Hermes International Group Limited | Other services | 2008 |
| Hermes International Investments Limited | Professional & scientific | 2008 |
| Herts Fibre Ltd | Information & communication | 2023 |
| Heston Design Build Ltd | Construction | 2024 |
| Heusden Corporate Services LLP | | 2022 |
| Heusden Group Limited | Construction | 2021 |
| Heusden Holdings LLP | | 2021 |
| Heven Fish Market Ltd | Wholesale & retail | 2026 |
| Heven Properties Ltd | Real estate | 2025 |
| Heven Supermarket Ltd | Wholesale & retail | 2022 |
| Heymedia Marketing Ltd | Professional & scientific | 2025 |
| HFS Nutritious Oils Limited | Manufacturing | 2026 |
| HGG Estates Ltd | Real estate | 2026 |
| HGV Gurpreet Ltd | Transport & logistics | 2025 |
| HI Tech Carpet & Flooring Ltd | Construction | 2023 |
| HI Tech Contruction UK Limited | Construction | 2026 |
| HI Tech Glass Supplier Ltd | Wholesale & retail | 2025 |
| HI Virk Ltd | Transport & logistics | 2022 |
| Hi-Profile Hair & Beauty Studio Ltd | Other services | 2015 |
| HIA Food Ltd | Wholesale & retail | 2025 |
| HIA Kitchens Ltd | Manufacturing | 2026 |
| Hibiscue Ltd | Construction | 2025 |
| Hiecom Ltd | Manufacturing | 2022 |
| High Tech Trader Ltd | Wholesale & retail | 2021 |
| High View Investments Midlands Limited | Real estate | 2025 |
| Highend London Ltd | Construction | 2022 |
| Highmoor Retreat Limited | Real estate | 2026 |
| Hijama Ltd | Health & social care | 2019 |
| Hilac Meat Cash & Carry Limited | Wholesale & retail | 2024 |
| Hilal Business Services Limited | Administrative & support | 2009 |
| Hilldene Pizza Ltd | Hospitality | 2025 |
| Hillhead Rail Limited | Construction | 2015 |
| Hilton Engineering and Management Ltd | Construction | 2021 |
| Hiltons Broadway Limited | Real estate | 2012 |
| Hiltons HMO Limited | Real estate | 2022 |
| Hiltons Western Road Limited | Real estate | 2012 |
| Himalaya Carpets Limited | Wholesale & retail | 1979 |
| Himalaya Housing CIC | Real estate | 2023 |
| Himalaya Real Estate Limited | Construction | 2016 |
| Hinna Mahmood Ltd | Health & social care | 2024 |
| Hinton Avenue Limited | Real estate | 2006 |
| Hippo Accessories Limited | Wholesale & retail | 2020 |
| Hira Transport Ltd | Transport & logistics | 2024 |
| Hire PCO Cars Ltd | Administrative & support | 2022 |
| Hire Taxi Services Limited | Transport & logistics | 2016 |
| Hirst Ltd | Real estate | 2025 |
| HIT & CB Ltd | Wholesale & retail | 2025 |
| HJG Services Limited | Professional & scientific | 2023 |
| HJJ Private Ltd | Real estate | 2025 |
| Hjm&Krj Property's Ltd | Real estate | 2022 |
| HJS Bridal Ltd | Wholesale & retail | 2023 |
| HK Cleaning Ltd | Other services | 2025 |
| HK Jewellers Ltd | Wholesale & retail | 2020 |
| HK Power Ltd | Wholesale & retail | 2018 |
| HK Pro Ltd | Administrative & support | 2025 |
| HK Property Holdings Ltd | Real estate | 2022 |
| HK Service Ltd | Construction | 2014 |
| HKG Transport Ltd | Transport & logistics | 2017 |