| HBP Ltd | Health & social care | 2023 |
| HD Bright Solutions Ltd | Manufacturing | 2025 |
| HD Fire & Electrical Ltd | Construction | 2015 |
| Heartwork Ltd | Information & communication | 2016 |
| Heating Master Ltd | Construction | 2019 |
| Heatwise GAS & Electrics Ltd | Construction | 2024 |
| Heritage Design Ltd | Wholesale & retail | 2025 |
| Herital Investments Limited | Professional & scientific | 2013 |
| Hesh Offlicence Ltd | Wholesale & retail | 2015 |
| HGV FIX and Go Ltd | Wholesale & retail | 2024 |
| Higher Carz Ltd | Wholesale & retail | 2025 |
| Highlyconnectedv Ltd | Professional & scientific | 2023 |
| Hill Top Security Services Ltd | Administrative & support | 2017 |
| Hmad Property Limited | Real estate | 2025 |
| Hodlok Ltd | Information & communication | 2023 |
| Holistic Alternative Remedies & Therapies Ltd | Wholesale & retail | 2017 |
| Hombres Entertainment Ltd | Arts & recreation | 2023 |
| Home Dream Construction Ltd | Construction | 2024 |
| Homesmart Property Solutions Limited | Hospitality | 2020 |
| Honeybee Solutions Limited | Administrative & support | 2015 |
| Hope R Limited | Health & social care | 2006 |
| Horizon UK Trading Limited | Wholesale & retail | 2016 |
| Hot Pink Pataki Ltd | Manufacturing | 2023 |
| Hot Shots Snooker Hall Limited | Arts & recreation | 2014 |
| House of Rhoyales Events and Catering Ltd | Hospitality | 2025 |
| Houson Investments Ltd | Extraterritorial | 2019 |
| HS Dhillon Limited | Transport & logistics | 2026 |
| HSP Property Ltd | Real estate | 2025 |
| Hubclamp Industries Limited | Extraterritorial | 2011 |
| Hughes Accommodation Ltd | Real estate | 2024 |
| Hybrid Leisure C.I.C. | Arts & recreation | 2014 |
| Hybrid Resources Ltd | Financial services | 2025 |
| Hyde Electrical Division Limited | Construction | 2023 |
| Hydrafix 2000 Limited | Manufacturing | 2000 |
| I and a W Solutions Limited | Professional & scientific | 2023 |
| I&K Transport Ltd | Transport & logistics | 2025 |
| I-Connect Utilities & Renewables Limited | Construction | 2019 |
| Iaacctv Limited | Other services | 2017 |
| IAN Holl Construction & Management Services Limited | Construction | 2014 |
| IC FLO Services Ltd | Transport & logistics | 2024 |
| Icare Care Ltd | Health & social care | 2025 |
| ICP Cyber Ltd | Information & communication | 2025 |
| Idoleyes Limited | Professional & scientific | 2022 |
| Ihygienics Ltd | Professional & scientific | 2021 |
| Image Wheels International Limited | Manufacturing | 1988 |
| Immersely Limited | Information & communication | 2022 |
| Impact Scaffolding and Building Services Ltd | Construction | 2023 |
| Imperial Breeze Healthcare Ltd | Health & social care | 2017 |
| Imperial Landjets Limited | Transport & logistics | 2025 |
| Imtad Ltd | Health & social care | 2013 |
| Indulgence Restaurant Ltd | Hospitality | 2020 |
| Indus Ventures Limited | Wholesale & retail | 2003 |
| Infinity Project Designs Limited | Other services | 2018 |
| Inglewood Residential Home Limited | Health & social care | 2006 |
| Ings Services Ltd | Wholesale & retail | 2015 |
| Initio Property & Investments Ltd | Real estate | 2025 |
| Innovare Care Ltd | Public administration | 2023 |
| Inpx Limited | Extraterritorial | 2017 |
| Inside OUT, Physical Health Therapies Ltd | Extraterritorial | 2024 |
| Institute of Sheet Metal Engineering | Other services | 1960 |
| Inter Cars United Kingdom - Automotive Technology Ltd | Wholesale & retail | 2017 |
| International Commissioning Engineers Limited | Manufacturing | 2001 |
| Intu Fashion Ltd | Wholesale & retail | 2021 |
| Invest-Ease Asset Management Ltd | Financial services | 2024 |
| Investhomes Property Ltd | Real estate | 2019 |
| IOT ADR Ltd | Transport & logistics | 2013 |
| IOT Fleet Services Ltd | Wholesale & retail | 2026 |
| Ipapanu Limited | Wholesale & retail | 2026 |
| IQ Lawyers UK Ltd | Professional & scientific | 2020 |
| IR Real Estate Ltd | Real estate | 2026 |
| Irconsultancyuk Ltd | Real estate | 2023 |
| Isometric Mechanical Ltd | Construction | 2019 |
| Italian Pizza Tipton Ltd | Hospitality | 2025 |
| IWI Holdings Limited | Financial services | 2017 |
| Iwis Drive Systems Limited | Manufacturing | 1994 |
| Izera Limited | Construction | 2020 |
| Izinkanyezi CIC | Professional & scientific | 2026 |
| Izzi Logistic Limited | Transport & logistics | 2025 |
| J a D Structures Ltd | Construction | 2018 |
| J M Patterns Limited | Professional & scientific | 2014 |
| J S Midland Properties Ltd | Real estate | 2023 |
| J Tranter Limited | Health & social care | 2019 |
| J&C RAM Properties Limited | Real estate | 2018 |
| J&M Supplies Ltd | Wholesale & retail | 2020 |
| J&S Services INT Ltd. | Construction | 2020 |
| J&S1 Ltd | Manufacturing | 2025 |
| J&Z Auto Service Ltd | Wholesale & retail | 2026 |
| J.P. Polymer Sheetings Limited | Wholesale & retail | 1990 |
| J.W. & D.M. Allen Limited | Real estate | 1969 |
| Jabres Properties Limited | Real estate | 2016 |
| Jackpot Deals Limited | Wholesale & retail | 2026 |
| Jackrabit Ltd | Information & communication | 2026 |
| Jade Garden Tipton Limited | Hospitality | 2025 |
| Jagir Developments Limited | Construction | 2021 |
| JAJ Corporation Ltd | Professional & scientific | 2026 |
| James Motors Ltd | Wholesale & retail | 2011 |
| Japji SAI Ltd | Wholesale & retail | 2022 |
| Jarep Limited | Real estate | 2008 |
| Jarvis Lettings Limited | Real estate | 2011 |
| Jasmer Limited | Real estate | 2021 |