| Highaims Realestate Ltd | Real estate | 2024 |
| Highams 26 Ltd | Other services | 2026 |
| Highser Limited | Construction | 2023 |
| Highstride Recruitment Ltd | Administrative & support | 2025 |
| Hijr Ltd | Wholesale & retail | 2026 |
| Hijrah Connect Ltd | Professional & scientific | 2026 |
| Hikmo Pharma Ltd | Wholesale & retail | 2026 |
| Hillbourne Residential Ltd | Real estate | 2020 |
| Hillflex Limited | Wholesale & retail | 2012 |
| Hilltop Logistics Ltd | Construction | 2019 |
| Hilltop Security UK Ltd | Other services | 2024 |
| Himaya Hijabs Ltd | Wholesale & retail | 2025 |
| Himrit Ltd | Wholesale & retail | 2025 |
| Hipkin Holdings Limited | Professional & scientific | 1997 |
| Hippolyte ET AL Company Limited | Health & social care | 2015 |
| Hiraj Group Ltd | Professional & scientific | 2024 |
| Hire N Drive Ltd | Administrative & support | 2025 |
| HIS Mercy Ltd | Health & social care | 2014 |
| Histomed & Health Care Limited | Health & social care | 2019 |
| Hiwa MO Ltd | Wholesale & retail | 2025 |
| HJS Building Services Limited | Construction | 2023 |
| Hknc Ltd | Real estate | 2022 |
| HM Broad Enterprises Ltd | Wholesale & retail | 2024 |
| HM Group & Investment Ltd | Real estate | 2023 |
| HM Medipharma Ltd | Professional & scientific | 2025 |
| HM Tailors Ltd | Manufacturing | 2024 |
| Hm&Hm Stars Ltd | Wholesale & retail | 2025 |
| Hmf&Mario Ltd | Construction | 2014 |
| HMG Building Services (Property) Ltd | Real estate | 2024 |
| HMG Building Services (Scaffolding) Ltd | Construction | 2022 |
| HNM Bengal Ltd | Wholesale & retail | 2026 |
| Hodis Civil Ltd | Construction | 2019 |
| Hoga Consultancy Ltd. | Administrative & support | 2015 |
| Holatinpo Services UK Ltd | Administrative & support | 2017 |
| Holinex Consultancy Services Limited | Professional & scientific | 2017 |
| Holistic Able Care Limited | Health & social care | 2020 |
| Holts of Hoxton Ltd | Wholesale & retail | 2026 |
| Holyfa Multibiz Limited | Other services | 2015 |
| Homage Corporation Ltd | Health & social care | 2018 |
| Home & Away Suites Ltd | Real estate | 2024 |
| Home and Away Student Services Limited | Hospitality | 2013 |
| Home Blox Ltd | Wholesale & retail | 2020 |
| Home Care Store Ltd | Wholesale & retail | 2026 |
| Home Care Supported Living Limited | Hospitality | 2022 |
| Home Choice Estate Agents Limited | Real estate | 2022 |
| Home Decisions Store Limited | Manufacturing | 2018 |
| Home Food London Ltd | Hospitality | 2023 |
| Home for YOU Properties Ltd | Real estate | 2022 |
| Home Land Developers Ltd | Construction | 2025 |
| Home of Thobe Limited | Wholesale & retail | 2025 |
| Home Smart Lease Properties Ltd | Real estate | 2020 |
| Homebuds Limited | Real estate | 2016 |
| Homepro Services Ltd | Construction | 2020 |
| Homesphere (Ammz) Ltd | Real estate | 2021 |
| Homestead Construction Services Ltd | Construction | 2023 |
| Homeverse Properties Ltd | Real estate | 2025 |
| Homi Estates Limited | Real estate | 2025 |
| Hones Maintenance Ltd | Manufacturing | 2025 |
| Honest Beauty Limited | Other services | 2021 |
| Honestcore Limited | Wholesale & retail | 2026 |
| Honey DO Limited | Wholesale & retail | 2024 |
| Honeydiamond Ltd | Transport & logistics | 2017 |
| Honourin Care Limited | Health & social care | 2021 |
| HOO Hing Holdings Limited | Wholesale & retail | 1978 |
| HOO Hing Limited | Wholesale & retail | 1991 |
| Hoorain & Co Limited | Transport & logistics | 2020 |
| Hope Accountancy Ltd | Professional & scientific | 2022 |
| Hope Care Home Services Limited | Health & social care | 2024 |
| Hope Civil Engineering Ltd | Construction | 2016 |
| Hope Management London Ltd | Other services | 2020 |
| Hope Pro London Ltd | Administrative & support | 2019 |
| Hope to the Hopeless | Health & social care | 2018 |
| Hopefield Care Limited | Health & social care | 2022 |
| Hopelash Ltd | Other services | 2023 |
| Horatio Eyewear Limited | Wholesale & retail | 2026 |
| Horizon AID International CIC | Health & social care | 2026 |
| Horizon Properties Investment Ltd | Real estate | 2025 |
| Hornak Venture Ltd | Wholesale & retail | 2022 |
| Horne Electrical Services Limited | Construction | 2007 |
| Horo SON Ltd | Hospitality | 2018 |
| Horseless Carriages & Holdings Ltd | Wholesale & retail | 2020 |
| Hoseenu Limited | Health & social care | 2015 |
| Hot & Tender (Essex) Ltd | Hospitality | 2019 |
| Hot Favourite Private Ltd | Hospitality | 2019 |
| Hotfoot Ltd | Administrative & support | 2024 |
| House Builders Ltd | Construction | 2023 |
| House Deep Cleaning Ltd | Administrative & support | 2024 |
| House of Flying Daggerz Limited | Construction | 2016 |
| House of Judah Dagenham Assemblies of GOD Ltd | Other services | 2017 |
| House of Lillies Ltd | Wholesale & retail | 2026 |
| House of Meliora Ltd | Wholesale & retail | 2020 |
| House of Nikee Ltd | Manufacturing | 2022 |
| House Refurbishment Ltd | Construction | 2022 |
| Housekeeping Recruitment Agenda Limited | Administrative & support | 2025 |
| Houses for Hire Property Ltd | Households | 2023 |
| Housing Direct Ltd | Real estate | 2026 |
| Housingbritain Limited | Real estate | 2004 |
| Hout of London Services Limited | Transport & logistics | 2022 |
| Howard ASC Ltd | Education | 2017 |
| Howard Security Services Ltd | Administrative & support | 2016 |