| Hunkins Choice Limited | Health & social care | 2013 |
| Hussain Midland Properties Ltd | Real estate | 2024 |
| Huts Technology Ltd | Extraterritorial | 2024 |
| HW8 Properties Ltd | Real estate | 2024 |
| Hyde Park Steels Limited | Wholesale & retail | 2012 |
| Hype Sneakers Limited | Wholesale & retail | 2023 |
| I.D. Pro-Clean Limited | Administrative & support | 2007 |
| I.T.Sherwood Limited | Financial services | 2018 |
| IAN Hill Photography Limited | Professional & scientific | 2022 |
| IAN Livie Concert Lighting Ltd | Administrative & support | 2025 |
| IAN Livie.Com Concert and Corporate Lighting Limited | Administrative & support | 2011 |
| IC90 Properties Limited | Real estate | 2024 |
| Ice Automotive Ltd | Wholesale & retail | 2025 |
| Ice Rentals Ltd | Transport & logistics | 2021 |
| Icefire Associates Limited | Administrative & support | 2020 |
| Iclick IT and Epos Solutions Ltd | Information & communication | 2012 |
| Icon Racer Limited | Extraterritorial | 2025 |
| Idi-Ci Europe Holdings Limited | Professional & scientific | 2009 |
| IEA Capital Ltd | Real estate | 2019 |
| IEK Customs Services Limited | Transport & logistics | 2021 |
| IEK Logistics Ltd | Transport & logistics | 2017 |
| Iffi (Midlands) | Other services | 2011 |
| IJ Smiles Ltd | Health & social care | 2023 |
| IJA Holdings Limited | Wholesale & retail | 2023 |
| IK Convenience Limited | Wholesale & retail | 2025 |
| Ikhuntind Solutions Ltd | Transport & logistics | 2017 |
| IM Transport Services Ltd | Transport & logistics | 2016 |
| Imagine Steel International Limited | Professional & scientific | 2004 |
| Imodelita Limited | Other services | 2025 |
| Impact Sales Coaching Ltd. | Professional & scientific | 2017 |
| Imperial Dental Studio Limited | Professional & scientific | 2014 |
| Imperial Oak Financial Solutions Ltd | Administrative & support | 2016 |
| Imperial SAM Limited | Administrative & support | 2024 |
| Import Merchants Limited | Administrative & support | 2004 |
| Imprint (West Midlands) Limited | Manufacturing | 2000 |
| Inc Design Associates Limited | Professional & scientific | 1995 |
| Inc Holdings Limited | Professional & scientific | 2008 |
| Indoor Snow Research Limited | Professional & scientific | 1988 |
| Industrial Metal Forms Limited | Manufacturing | 1980 |
| Inertia Management Limited | Manufacturing | 2013 |
| Infinity Property London Ltd | Real estate | 2015 |
| Infused Art Ltd | Wholesale & retail | 2025 |
| Ingram Properties Limited | Real estate | 2000 |
| Inner City Electrical Limited | Wholesale & retail | 2008 |
| Inner Strength Wellbeing Solutions Ltd | Other services | 2025 |
| Innovo Group Limited | Financial services | 2016 |
| Inside OUT Building & Landscaping Solutions Ltd | Construction | 2018 |
| Insulated Roller Shutters Limited | Extraterritorial | 2002 |
| Integrity Products Limited | Manufacturing | 2012 |
| Intelligent Media Analytics Ltd | Information & communication | 2026 |
| Inter-Tube Ltd | Wholesale & retail | 2015 |
| International Cookware Distribution Limited | Manufacturing | 2010 |
| International Power Presses Limited | Professional & scientific | 2000 |
| Intoinsight Limited | Information & communication | 2023 |
| Intosafety Ltd | Professional & scientific | 2024 |
| Intranet Limited | Information & communication | 2003 |
| Intuitive Computer Management Ltd | Information & communication | 2009 |
| Invest TK Limited | Real estate | 2023 |
| IPG Retail Limited | Financial services | 2013 |
| Iron Lady Fitness Solutions Ltd | Other services | 2026 |
| Isgrove Properties Limited | Real estate | 2021 |
| Iskang Ltd | Professional & scientific | 2013 |
| J & J Construction Solutions Limited | Construction | 2009 |
| J & L Electrics (LYE) Limited | Construction | 2001 |
| J & L Investment Properties Limited | Real estate | 2020 |
| J & M Fletcher Ltd | Households | 2025 |
| J & M Yeomans Limited | Education | 2012 |
| J B L F Steel Fabrications Ltd | Manufacturing | 2012 |
| J Bridgwood Holdings Limited | Financial services | 2018 |
| J Crocker Ltd | Construction | 2026 |
| J D Commercial Bodies Ltd | Administrative & support | 2021 |
| J Edwards Transport Limited | Transport & logistics | 2004 |
| J H Kemp (Holdings) Limited | Professional & scientific | 2012 |
| J H Kemp Limited | Manufacturing | 2000 |
| J P & J Lettings Limited | Real estate | 2018 |
| J Stafford Developments Limited | Real estate | 2017 |
| J Stafford Holiday Lets Limited | Real estate | 2023 |
| J T W Metals Limited | Water & waste | 2009 |
| J T W Properties (Midlands) Limited | Real estate | 2021 |
| J W Marsh Funeral Directors Ltd | Other services | 2014 |
| J&G ALI Limited | Information & communication | 2007 |
| J&K Pipelines Limited | Construction | 2018 |
| J&M Haulage Services UK Limited | Transport & logistics | 2025 |
| J. Barnsley Cranes Limited | Manufacturing | 1989 |
| J.C.O. Industrial Roofing & Cladding Limited | Construction | 2011 |
| J.D Welding Service's Ltd | Manufacturing | 2015 |
| J.F.T. Law & Company Limited | Extraterritorial | 2013 |
| J.Harper & Sons(Leominster)Limited | Construction | 1963 |
| J.M.B Utilities Ltd | Construction | 2021 |
| J.R.M Electrical Contractors Limited | Construction | 2013 |
| J4G Design & Consultancy Limited | Professional & scientific | 2014 |
| JA Dent Limited | Health & social care | 2023 |
| JA Productions Limited | Arts & recreation | 2007 |
| Jack B Properties Ltd | Real estate | 2018 |
| JAM Consultants Limited | Professional & scientific | 2023 |
| James Grayson Properties Limited | Real estate | 2020 |
| James LEE Solutions Ltd | Construction | 2020 |
| James Wade Dart Promotions Ltd | Arts & recreation | 2009 |
| Jammy Eagle Holdings Limited | Financial services | 2024 |
| Jannah Cusin Ltd | Hospitality | 2022 |