| H & N Community Housing C.I.C. | Hospitality | 2026 |
| H & R Investment Properties Ltd | Real estate | 2004 |
| H & T Real Estate Limited | Real estate | 2020 |
| H a Partners Ltd | Administrative & support | 2012 |
| H a Events & Productions Ltd | Administrative & support | 2026 |
| H a Khan Ltd | Wholesale & retail | 2025 |
| H a Logistics Ltd | Transport & logistics | 2013 |
| H a Suppliers Ltd | Real estate | 2020 |
| H Academy Ltd | Education | 2021 |
| H and J Inspire Ltd | Real estate | 2020 |
| H and N Pro Ltd | Real estate | 2022 |
| H Basi Limited | Financial services | 2011 |
| H Bomb Limited | Wholesale & retail | 2018 |
| H Camilla Lowe Studio Ltd | Professional & scientific | 2026 |
| H E Corp Ltd | Other services | 2019 |
| H F Curtains & Rugs Ltd | Wholesale & retail | 2019 |
| H F Rogers Joinery & Cabinet Making Ltd | Construction | 2025 |
| H J Berkley Ltd | Construction | 2019 |
| H J Online Limited | Wholesale & retail | 2016 |
| H N Courier Services Ltd | Other services | 2018 |
| H Q Lounge Ltd | Hospitality | 2023 |
| H Q Supplies Ltd | Other services | 2020 |
| H R Land Limited | Real estate | 2013 |
| H R Minhas Traders Limited | Wholesale & retail | 2025 |
| H S Birdi Limited | Health & social care | 2010 |
| H S Shisha Limited | Wholesale & retail | 2018 |
| H Sandhu Consultancy Ltd | Other services | 2021 |
| H Sandhu Holdings Limited | Real estate | 2022 |
| H X Immigration Services Ltd | Professional & scientific | 2021 |
| H Y H Limited | Real estate | 2008 |
| H&A Plumbing and Drainage Limited | Construction | 2025 |
| H&A Properties London Ltd | Real estate | 2026 |
| H&A Shopping Ltd | Wholesale & retail | 2026 |
| H&A Wholesale Ltd | Wholesale & retail | 2025 |
| H&F Solutions Ltd | Construction | 2016 |
| H&H Couriers Ltd | Transport & logistics | 2025 |
| H&H New Fashion Ltd | Wholesale & retail | 2015 |
| H&H Shopings Limited | Wholesale & retail | 2025 |
| H&H Tyre and Service Centre Ltd | Wholesale & retail | 2016 |
| H&J Real Estate Ltd | Real estate | 2026 |
| H&K Business Associates Limited | Professional & scientific | 2014 |
| H&M Chauffeur Ltd | Transport & logistics | 2025 |
| H&M Inventory Ltd | Real estate | 2025 |
| H&M Tech Limited | Wholesale & retail | 2025 |
| H&M Transport Solutions Ltd | Transport & logistics | 2026 |
| H&P Property Holdings Ltd | Real estate | 2020 |
| H&R Services Ltd | Construction | 2020 |
| H&S Developers Ltd | Real estate | 2024 |
| H&S Doal Ltd | Real estate | 2020 |
| H&S Facilities Management Limited | Administrative & support | 2024 |
| H&S Group Holdings Ltd | Financial services | 2023 |
| H&S London Construction Ltd | Hospitality | 2024 |
| H&S London Roofing Ltd | Construction | 2021 |
| H&S Properties London Ltd | Construction | 2023 |
| H&S Resources Ltd | Real estate | 2025 |
| H&S Training Academy Ltd | Education | 2022 |
| H&S Unity Ltd | Wholesale & retail | 2024 |
| H,M & J Singh and Sons Ltd | Construction | 2022 |
| H,M J Singh Properties Limited | Real estate | 2024 |
| H-Malik Traders Ltd | Transport & logistics | 2025 |
| H-Preet Ltd | Construction | 2025 |
| H. Y. R. (UK) Limited | Wholesale & retail | 2010 |
| H.A. Fleet Ltd | Wholesale & retail | 2023 |
| H.A. Optical Care Ltd | Health & social care | 2026 |
| H.A.A. Services Limited | Real estate | 2004 |
| H.B Mechanical Ltd | Wholesale & retail | 2025 |
| H.B.A Mangan Ltd | Other services | 2019 |
| H.I Venturez Limited | Transport & logistics | 2025 |
| H.I.T. Enterprise Limited | Information & communication | 2012 |
| H.J.K. Property Ltd. | Real estate | 2016 |
| H.Master Limited | Health & social care | 2009 |
| H.O.P.E. Superjobs Limited | Administrative & support | 2004 |
| H2 Trading Ltd | Wholesale & retail | 2022 |
| H2 Variety Ltd | Wholesale & retail | 2024 |
| H2A Property Ltd | Real estate | 2026 |
| H2R Homes Community Interest Company | Real estate | 2026 |
| H3 Electrical & Engineering Services Limited | Construction | 2016 |
| H3K Investments Ltd | Financial services | 2025 |
| HA Consulting (GB) Ltd | Professional & scientific | 2014 |
| HA Developments Ltd | Extraterritorial | 2024 |
| HA Enterprise London Ltd | Information & communication | 2026 |
| HA Health & Education Ltd | Professional & scientific | 2026 |
| HA Management Services Ltd | Professional & scientific | 2020 |
| HA Naturals Ltd | Wholesale & retail | 2018 |
| HA Prime Ltd | Wholesale & retail | 2026 |
| HA Services London Limited | Construction | 2018 |
| HA24 Health Care Ltd | Health & social care | 2022 |
| HAA Trading Ltd | Wholesale & retail | 2018 |
| HAA Enterprise Ltd | Transport & logistics | 2025 |
| HAA Homes Limited | Real estate | 2019 |
| HAA Partners Limited | Administrative & support | 2016 |
| HAA Property Ltd | Real estate | 2020 |
| Haaris Bird Centre Limited | Wholesale & retail | 2020 |
| Haavey Construction Ltd | Financial services | 2025 |
| Habalynq Limited | Construction | 2015 |
| Habeering Limited | Extraterritorial | 2022 |
| Habib London Properties Limited | Real estate | 2020 |
| Habib Munawar Ltd | Information & communication | 2017 |
| Habib's Maintenance & Building Ltd | Construction | 2024 |
| Habiba Foods Limited | Hospitality | 2019 |