| Hope Healthcare Limited | Health & social care | 2018 |
| Hope of Glory International Christian Centre Ltd | Other services | 2026 |
| Hopeway-Thebridge Ltd | Information & communication | 2018 |
| House of Fades Limited | Other services | 2018 |
| House of Vianni Ltd | Wholesale & retail | 2025 |
| Howard Langley Associates Limited | Professional & scientific | 2007 |
| HPJ Properties Ltd | Real estate | 2025 |
| HPT Medical Ltd | Health & social care | 2023 |
| Hridoye Bangabandhu Limited | Other services | 2025 |
| HRS Properties 1 Ltd | Real estate | 2025 |
| HSY Accountancy Services Ltd | Professional & scientific | 2011 |
| Hummerstone & Hawkins Limited | Real estate | 2019 |
| Hurr Consulting Ltd | Professional & scientific | 2024 |
| Hutchins Solutions Ltd | Professional & scientific | 2012 |
| HV Consulting Solutions Ltd | Professional & scientific | 2024 |
| HV Logistics Ltd | Transport & logistics | 2026 |
| Hydor Space Ltd | Hospitality | 2021 |
| Hydro Machines Ltd | Other services | 2012 |
| Hyoju Trade Ltd | Wholesale & retail | 2022 |
| Hyperlearning AI Ltd | Information & communication | 2015 |
| Hypermartique Limited | Wholesale & retail | 2024 |
| Hyperspace Group Ltd | Education | 2025 |
| I & B Property Services Limited | Real estate | 2025 |
| I AM Kreative & Legal Consults Ltd | Information & communication | 2020 |
| I N K Extra Ventures and Outfitters Limited | Wholesale & retail | 2015 |
| IAN Underhill Drainage and Building Specialist Limited | Water & waste | 2019 |
| IBS Business Limited | Health & social care | 2014 |
| Ibtose Limited | Real estate | 2021 |
| Ice 4 YOU Ltd. | Wholesale & retail | 2019 |
| Icona Projects Contracting Company Ltd | Wholesale & retail | 2025 |
| Ideals City Ltd | Health & social care | 2024 |
| IEM Construction Ltd | Construction | 2021 |
| IG Accounting & Auditing Ltd | Professional & scientific | 2018 |
| IHB Construction Limited | Construction | 2022 |
| Ijgbconnect Ltd | Administrative & support | 2025 |
| Ikem Consulting Ltd | Construction | 2013 |
| Ikem Design Limited | Professional & scientific | 2020 |
| Ilidench Ltd | Construction | 2020 |
| Illing Ltd | Professional & scientific | 2022 |
| Immigrans Global Limited | Real estate | 2024 |
| Imperialis Ltd | Wholesale & retail | 2023 |
| Indian Curry Corner Limited | Hospitality | 2024 |
| Ines Peres Pereira Limited | Professional & scientific | 2023 |
| Infitech Business Solutions Limited | Information & communication | 2015 |
| Infitech Investments Limited | Real estate | 2018 |
| Infohive Ltd | Information & communication | 2024 |
| Insiders Intelligence Ltd | Information & communication | 2025 |
| Inspire Hair and Beauty Academy Ltd | Other services | 2018 |
| Instabuilders Ltd | Administrative & support | 2022 |
| Inswè Ltd | Wholesale & retail | 2025 |
| Integrisure Limited | Professional & scientific | 2008 |
| Intellect Elevators Ltd | Construction | 2019 |
| Introlux Properties Ltd | Real estate | 2025 |
| Inventapropertyinventories Ltd | Households | 2026 |
| Inversure Umbrella Ltd | Financial services | 2017 |
| Investment Property Group Ltd | Real estate | 2018 |
| IO Surveying Limited | Professional & scientific | 2018 |
| IP Aesthetics Limited | Health & social care | 2020 |
| Iptf Management Limited | Professional & scientific | 2023 |
| Iqra Services Ltd | Transport & logistics | 2023 |
| Iraq International Company Ltd | Wholesale & retail | 2025 |
| Irinajo Ltd. | Administrative & support | 2014 |
| Ishaa Enterprise Ltd | Other services | 2024 |
| Isuru Oshada Ltd | Administrative & support | 2015 |
| Italo Limited | Professional & scientific | 2024 |
| Itanna Care Limited | Health & social care | 2023 |
| Itech Wholesalers Ltd | Wholesale & retail | 2018 |
| Itnry Ltd | Transport & logistics | 2025 |
| Itreset Ltd | Information & communication | 2026 |
| Itservice Direct Limited | Information & communication | 2015 |
| Ivia Contractors Ltd | Construction | 2017 |
| Ivrona Ltd | Transport & logistics | 2020 |
| Ivyca Ltd | Health & social care | 2026 |
| Izzpro Ltd | Households | 2026 |
| J & D Pallet Services Limited | Transport & logistics | 2004 |
| J C S Consulting Services Limited | Information & communication | 1991 |
| J F Lift Repairs Ltd | Manufacturing | 2020 |
| J S Dhesi Ltd | Health & social care | 2003 |
| J&S Construction Ltd | Construction | 2026 |
| J&S Entertainment Limited | Hospitality | 2018 |
| J.A.R. Anderson Ltd | Information & communication | 2012 |
| J.H. Garlick Limited | Administrative & support | 1973 |
| J115 Properties Ltd | Real estate | 2024 |
| J2E Properties Limited | Real estate | 2023 |
| J3 Logistics Ltd | Transport & logistics | 2024 |
| J3S UK Property Ltd | Real estate | 2021 |
| Jaag Group Ltd | Financial services | 2025 |
| Jaal Cleaning Service Ltd | Administrative & support | 2026 |
| Jack Thomas Electrical Contractors Limited | Construction | 2021 |
| Jaffna Construction Ltd | Construction | 2012 |
| Jahangir Ltd | Wholesale & retail | 2026 |
| Jamestown Ltd | Administrative & support | 2023 |
| Jamrah AL Fayd Ltd | Manufacturing | 2025 |
| Jamsta Global Limited | Information & communication | 2018 |
| JAN & Minnaaz Ltd | Real estate | 2025 |
| Janus and Lara Ltd | Transport & logistics | 2022 |
| Janus Fashion Ltd | Manufacturing | 2024 |
| Jardel Ltd | Transport & logistics | 2015 |
| JAT Ventures Ltd | Real estate | 2020 |
| JAX Auto Group Ltd | Wholesale & retail | 2024 |