| H&N Practice Management Limited | Professional & scientific | 2026 |
| H&O Tech Ltd | Wholesale & retail | 2020 |
| H&R Beauty Ltd | Other services | 2025 |
| H&S ALI Limited | Health & social care | 2019 |
| H&S Ecom Limited | Wholesale & retail | 2025 |
| H&S Holdings (3 Counties) Limited | Real estate | 2021 |
| H&S Luton Ltd | Administrative & support | 2016 |
| H&S Transport (London) Limited | Transport & logistics | 2017 |
| H&S Travel Limited | Transport & logistics | 2018 |
| H&S Zaman Sons Ltd | Wholesale & retail | 2026 |
| H&T Co Ltd | Wholesale & retail | 2025 |
| H-R Axis Trade Co Limited | Information & communication | 2025 |
| H. Butterfield Trustee Limited | Wholesale & retail | 2023 |
| H. Mcintyre & Sons Limited | Construction | 1974 |
| H.A Builders Limited | Construction | 2024 |
| H.A Williams Enterprises Limited | Real estate | 2022 |
| H.Hussien Ltd | Health & social care | 2025 |
| H.M.R.A Holdings Ltd | Real estate | 2025 |
| H.R. Tennants Limited | Real estate | 1997 |
| H.S Property Acquisitions Ltd | Real estate | 2021 |
| H.Syed Pharma Ltd | Health & social care | 2020 |
| H.W Transports Ltd | Transport & logistics | 2020 |
| H.Y. Logistics Ltd | Transport & logistics | 2025 |
| H.Zoltan Contractors Ltd | Transport & logistics | 2015 |
| H2BR Holdings Ltd | Financial services | 2025 |
| H2K Healthcare Limited | Health & social care | 2016 |
| HA ENT Ltd | Other services | 2025 |
| HA Health Ltd | Health & social care | 2025 |
| HA Investments Group Ltd | Real estate | 2021 |
| HA Properties Investment Ltd | Real estate | 2021 |
| HA Solutions(Uk) Ltd | Professional & scientific | 2014 |
| HA Tran Enterprise Limited | Other services | 2014 |
| HA Wares Ltd | Wholesale & retail | 2024 |
| HA Windows and Doors Ltd | Construction | 2021 |
| Haap Ltd | Professional & scientific | 2026 |
| Haas Store Ltd | Wholesale & retail | 2025 |
| Haberstash Ltd | Wholesale & retail | 2011 |
| Habib and SON Transport Ltd | Transport & logistics | 2026 |
| Habib Variety Store Limited | Wholesale & retail | 2022 |
| Habilito Ltd | Other services | 2015 |
| Haddon FEW Montuschi Architects Limited | Professional & scientific | 1993 |
| Hadi Cars Ltd | Wholesale & retail | 2024 |
| Hadleigh Gate ( Harrow) Management Co. Ltd | Households | 2012 |
| Hafeez Motors Limited | Transport & logistics | 2016 |
| Hafiz Majumdar & Sons Properties Ltd | Real estate | 2025 |
| HAG Autos Ltd | Wholesale & retail | 2021 |
| Hagere Foods Limited | Hospitality | 2024 |
| Haggerston Road Ltd | Real estate | 2013 |
| Hagton MB Car Wash Ltd | Wholesale & retail | 2025 |
| HAI Global Ltd | Hospitality | 2023 |
| Haider K Engineering Ltd | Construction | 2025 |
| Haider Q S Services Limited | Professional & scientific | 2019 |
| Hailey International Limited | Wholesale & retail | 2025 |
| Hair Services Ltd | Other services | 2020 |
| Hair Systems Europe Limited | Manufacturing | 1998 |
| Hairoun Business Solutions Ltd | Administrative & support | 2017 |
| Hairven Artistry Limited | Wholesale & retail | 2025 |
| Haiwing Ltd | Hospitality | 2022 |
| Haji Motors Ltd | Wholesale & retail | 2020 |
| Hajrashakoor Ltd | Wholesale & retail | 2024 |
| Hakeem Property Management Limited | Real estate | 2025 |
| Hakh Holdings Ltd | Real estate | 2025 |
| Hakie Ltd | Information & communication | 2026 |
| Halal Cart Ltd | Wholesale & retail | 2019 |
| Halal Catering Limited | Hospitality | 2025 |
| Halal Food Services Ltd | Wholesale & retail | 2017 |
| Halal Fried Ltd | Hospitality | 2025 |
| Halal Matchmakers Limited | Other services | 2018 |
| Halal Meat & Grocery Store Ltd | Wholesale & retail | 2019 |
| Halal Mini Market Ltd | Wholesale & retail | 2024 |
| Halal Shopping Expo Ltd | Administrative & support | 2025 |
| Halal Travel PAL Ltd | Administrative & support | 2025 |
| Halalfluence Ltd. | Other services | 2025 |
| Halali Finance Ltd | Professional & scientific | 2026 |
| Haldini Ltd | Construction | 2026 |
| Hale & Mccloy Design Ltd | Professional & scientific | 2021 |
| Hale Construction Limited | Construction | 2016 |
| Hale Paving & Design Ltd | Construction | 2025 |
| Hale Paving & Landscaping Ltd | Administrative & support | 2025 |
| Hale Paving Ltd | Administrative & support | 2025 |
| Haleem Services Ltd | Administrative & support | 2025 |
| Haleema Limited | Other services | 2021 |
| Half a Yard Limited | Wholesale & retail | 2022 |
| Halima and Aminah Ltd | Information & communication | 2024 |
| Halima Enterprises Limited | Real estate | 2017 |
| Halls Homes for Young People Ltd | Hospitality | 2018 |
| Hallstart Limited | | 1988 |
| Halo Gym Limited | Arts & recreation | 2024 |
| Halo Residential Limited | Real estate | 2020 |
| Halo Wellness Hub CIC | Arts & recreation | 2024 |
| Halwala Ltd | Wholesale & retail | 2024 |
| HAM FAM Media Ltd | Information & communication | 2026 |
| HAM Trans Limited | Transport & logistics | 2025 |
| Hamdaan Heavy Machinery Trading Limited | Information & communication | 2026 |
| Hamdan IH Ltd | Wholesale & retail | 2025 |
| Hamdi Healthcare Ltd | Health & social care | 2021 |
| Hameem Ltd | Wholesale & retail | 2018 |
| Hameesha Limited | Wholesale & retail | 2018 |
| Hamid and Sons Ltd | Hospitality | 2024 |
| Hamid Leather UK Limited | Wholesale & retail | 2022 |