| Hamusa Ltd | Wholesale & retail | 2026 |
| Hamza Fried Chicken Ltd | Hospitality | 2018 |
| Hamza Hospitality Limited | Hospitality | 2025 |
| Hamza Online Academy Ltd | Education | 2021 |
| Hamza Services Limited | Transport & logistics | 2023 |
| Hamzai Trading Ltd | Other services | 2019 |
| Hanas Closet Ltd | Wholesale & retail | 2023 |
| Hana’S Collections Limited | Wholesale & retail | 2026 |
| Hanbo Trading Limited | Hospitality | 2025 |
| Hand of Grace Co Limited | Health & social care | 2019 |
| Hand to Door Ltd | Wholesale & retail | 2021 |
| Handa Heating Limited | Construction | 2017 |
| Hands of Mercy and Hope Ltd | Other services | 2018 |
| Handset Hub Ltd | Wholesale & retail | 2023 |
| Handske Ltd | Real estate | 2024 |
| Handy MAN & Light Haulage Services Limited | Construction | 2018 |
| Handy Skills Ltd | Other services | 2013 |
| Hang IT Services Ltd | Construction | 2019 |
| Hani Massage and Spa Limited | Other services | 2023 |
| Hania’S Skincare Ltd | Wholesale & retail | 2026 |
| Haniya Medical Services Ltd | Health & social care | 2026 |
| Hanjeee Sweets Ltd | Wholesale & retail | 2021 |
| Hanley Tech Ltd | Information & communication | 2024 |
| Hanley's Housing Limited | Real estate | 2020 |
| Hannah Hope Limited | Hospitality | 2019 |
| Hanson Furnishings Limited | Manufacturing | 2020 |
| Hanspal Capital Partners Limited | Real estate | 2024 |
| Hansphull Limited | Construction | 2020 |
| Hanuman Consulting Ltd | Information & communication | 2019 |
| Hanuman IT Consultants Limited | Information & communication | 2024 |
| Hanyvision Ltd | Information & communication | 2021 |
| Happeo Ltd | Information & communication | 2021 |
| Happify Limited | Wholesale & retail | 2022 |
| Happy 2 Move Limited | Transport & logistics | 2012 |
| Happy Blessing Limited | Health & social care | 2012 |
| Happy BOY Consultancy Limited | Professional & scientific | 2024 |
| Happy Days (2012) Ltd | Wholesale & retail | 2012 |
| Happy Duffy Ltd | Professional & scientific | 2020 |
| Happy HIS and Hers Hair Ltd | Other services | 2021 |
| Happy Homes Estate Limited | Real estate | 2024 |
| Happy Hounds Holidays Limited | Agriculture & fishing | 2021 |
| Happyhome Community Support CIC | Health & social care | 2025 |
| Happyhut Investments Ltd | Real estate | 2022 |
| Hapzon Properties Ltd | Real estate | 2018 |
| HAQ Enterprise Estates Ltd | Real estate | 2025 |
| HAQ Holdings Ltd | Education | 2024 |
| Haqiqat Global Incorporation Limited | Hospitality | 2019 |
| Haque Technical Ltd | Extraterritorial | 2015 |
| HAR Property Ltd | Construction | 2021 |
| Haram Traders Limited | Wholesale & retail | 2025 |
| Haramaincars Ltd | Transport & logistics | 2025 |
| Harbour 2011 Limited | Hospitality | 2010 |
| Harcombe Manor Limited | Administrative & support | 2016 |
| Hardarshan Ltd | Health & social care | 2025 |
| Hardwoodstairs Limited | Wholesale & retail | 2025 |
| Hardy Group Limited | Financial services | 1996 |
| Hareem Enterprises Limited | Wholesale & retail | 2022 |
| Harewood Place (Slough) Management Limited | Households | 1994 |
| Hargun Flooring Ltd | Other services | 2018 |
| Hargun Transport Limited | Transport & logistics | 2025 |
| Harhulla GX Properties Ltd | Real estate | 2026 |
| Hari Food and Wine Ltd | Wholesale & retail | 2020 |
| Hari Real Estate Ltd | Real estate | 2026 |
| Harihara Properties Ltd | Real estate | 2021 |
| Harimex Limited | Transport & logistics | 2026 |
| Harita K Sahans Ltd | Health & social care | 2017 |
| Harjinder S Gill Ltd | Real estate | 2026 |
| Harjs Ltd | Real estate | 2025 |
| Harkirat Singh Ltd | Construction | 2025 |
| Harleen Estates Ltd | Real estate | 2026 |
| Harley Street Medical Group Limited | Professional & scientific | 2007 |
| Harlington Investments Limited | Administrative & support | 2002 |
| Harman Services Limited | Transport & logistics | 2017 |
| Harmeet Sehra Ltd | Administrative & support | 2017 |
| Harmony Staffing & Living Ltd | Administrative & support | 2025 |
| Harmony Wellness Ltd | Extraterritorial | 2025 |
| Harnam and Son's Limited | Wholesale & retail | 2024 |
| Harnam Homes Developments Limited | Real estate | 2021 |
| Harnek Building Solutions Limited | Construction | 2026 |
| Harneklondon Limited | Real estate | 2026 |
| Haroon's Realty Group Ltd | Real estate | 2024 |
| Harpreet SINGH10 Ltd | Construction | 2021 |
| Harpreet Transport Ltd | Transport & logistics | 2018 |
| HARPREET86 Ltd | Health & social care | 2023 |
| Harrier Haulage Heathrow Ltd | Transport & logistics | 2013 |
| Harringtons Cars Ltd | Wholesale & retail | 2021 |
| Harrison & Co (Rose Lane ) Ltd | Real estate | 2017 |
| Harrison Managed Investments Ltd | Real estate | 2025 |
| Harry Clark 5 Ltd | Arts & recreation | 2024 |
| Harry Ghotra Limited | Transport & logistics | 2015 |
| Harry Group Limited | Administrative & support | 2020 |
| Harry's Park & Drink Ltd | Hospitality | 2026 |
| Harry's Truck Tyres Ltd | Wholesale & retail | 2024 |
| Harrys Transport Ltd | Transport & logistics | 2021 |
| Harrytyres Ltd | Wholesale & retail | 2022 |
| Harsahib Ltd | Real estate | 2022 |
| Hart 2 Hart Properties Ltd | Real estate | 2026 |
| Hart Plumbing & Heating Ltd | Construction | 2024 |
| Hartley Way Homes Ltd | Real estate | 2025 |
| Hartt Performance Ltd | Professional & scientific | 2014 |