| Huddersfield Engineering Limited | Manufacturing | 2003 |
| Huddersfield Railway Modellers Limited | Construction | 2004 |
| Huddersfield Rifle Club Limited | Arts & recreation | 2025 |
| Hudson Advisory Services Limited | Professional & scientific | 2022 |
| Hudson Horticultural Limited | Administrative & support | 2008 |
| Huepricenow Ltd | Wholesale & retail | 2025 |
| Hulmes Law Limited | Professional & scientific | 2016 |
| Humber Bridge Garden Centre Limited | Wholesale & retail | 2020 |
| Humber Security Solutions Limited | Administrative & support | 2015 |
| Hunter Accountancy Limited | Professional & scientific | 2014 |
| Huntpoint Limited | Professional & scientific | 2013 |
| Hurcombe Developments Ltd | Construction | 2010 |
| Husht Acoustics Limited | Construction | 2016 |
| Hussain's Property Lettings Solutions Limited | Real estate | 2026 |
| Huttal Media Ltd | Information & communication | 2022 |
| Huva Limited | Manufacturing | 2025 |
| Huxley Software Ltd | Information & communication | 2007 |
| Hydranback Ltd | Financial services | 2018 |
| Hydraulic System Products Limited | Professional & scientific | 1972 |
| Hydrogen Energy Solutions UK Ltd | Extraterritorial | 2025 |
| Hyett & Co Ltd. | Other services | 2013 |
| Hygiena Cleaning Services Ltd | Administrative & support | 2023 |
| Hygiene Services (Yorkshire) Limited | Water & waste | 2005 |
| Hygienic UK Ltd | Administrative & support | 2004 |
| Hyped AF Ltd | Arts & recreation | 2025 |
| Hyper Shop Ltd | Wholesale & retail | 2025 |
| Hypersell UK Ltd | Wholesale & retail | 2025 |
| Hypersync Consult Ltd | Information & communication | 2025 |
| Hypertik Ltd | Professional & scientific | 2025 |
| Hysa Building Ltd | Construction | 2023 |
| HZS Stainless Steel Ltd | Construction | 2023 |
| H’S Coffee Corner Limited | Manufacturing | 2024 |
| I & S Properties Limited | Real estate | 1997 |
| I a Motors Wakefield Ltd | Wholesale & retail | 2025 |
| I Stools Limited | Manufacturing | 2020 |
| I V S Design Ltd. | Manufacturing | 2020 |
| I&A Autos Limited | Wholesale & retail | 2022 |
| I-I Hygge Limited | Wholesale & retail | 2023 |
| I-Life Travel Limited | Administrative & support | 2017 |
| I-Motel Limited | Administrative & support | 2006 |
| I-Tex Solutions Limited | Manufacturing | 2012 |
| I.C. Dental Laboratory Limited | Manufacturing | 2024 |
| I.C.T. Limited | Administrative & support | 2006 |
| I.M.A Furniture Trading Ltd | Wholesale & retail | 2026 |
| I7.NET Solutions Limited Partnership | | 2008 |
| Iam-Pam Ltd | Administrative & support | 2026 |
| IAN Godwin Consultancy Ltd | Professional & scientific | 2018 |
| IASPIRE2 Community Interest Company | Education | 2016 |
| Iasyorkshire Ltd | Professional & scientific | 2025 |
| Ibakeholdings Ltd | Hospitality | 2026 |
| Ibhaan Ltd | Real estate | 2020 |
| IBN Saeed Limited | Wholesale & retail | 2022 |
| Ibod Consultancy Limited | Information & communication | 2016 |
| IBP Providers Limited | Information & communication | 2004 |
| Ibritz Holdings Ltd | Real estate | 2026 |
| Ibritz Limited | Real estate | 2024 |
| IC GEO Limited | Construction | 2024 |
| Iceberg M LP | | 2014 |
| Icebite Wakefield Ltd | Wholesale & retail | 2022 |
| Icolocate Limited | Real estate | 2004 |
| Icon Care Ltd | Health & social care | 1996 |
| Iconic Autos Ltd | Wholesale & retail | 2020 |
| Iconic Bars and Clubs Ltd | Hospitality | 2026 |
| ICR Property Ltd | Real estate | 2020 |
| Ictu Ltd | Information & communication | 2014 |
| ICW (UK) Ltd | Manufacturing | 1993 |
| ID Branded Ltd | Professional & scientific | 2024 |
| ID Infinite Detail Limited | Wholesale & retail | 2019 |
| ID Network Ltd | Information & communication | 2019 |
| Idea Foundry Ltd | Information & communication | 2001 |
| Ideal Decor Ltd | Construction | 2026 |
| Ideal Glazing Ltd | Construction | 2024 |
| Identify Group Holdings Ltd | Financial services | 2026 |
| Identify Holdings Ltd | Real estate | 2018 |
| Identify Web Design Limited | Information & communication | 2013 |
| Idotoo Ltd | Information & communication | 2025 |
| Idyd Ltd | Wholesale & retail | 2021 |
| Idyllic Property Ltd | Real estate | 2022 |
| Ie.Ie (Excellent Enterprises UK) Ltd. | Wholesale & retail | 2013 |
| IES Electrical & Renewables Ltd | Construction | 2026 |
| Iglobal Investments Ltd | Financial services | 2023 |
| Iglobal IT Ltd | Information & communication | 2023 |
| Ignition Go Ltd | Wholesale & retail | 2015 |
| IH Leisure Limited | Manufacturing | 2011 |
| Ihec Group Ltd | Health & social care | 2021 |
| Iiris Limited | Hospitality | 2012 |
| IK9 Security Limited | Administrative & support | 2014 |
| Ikaro Group Ltd | Hospitality | 2023 |
| IKL Transport & Hiab Hire Ltd | Transport & logistics | 2015 |
| Ikon Design Limited | Professional & scientific | 1997 |
| Iliesmoves Easy Ltd | Transport & logistics | 2022 |
| ILLUMIN8 Facilities Management Limited | Construction | 2024 |
| Ilml Ltd. | Professional & scientific | 2015 |
| Ilondon Ltd | Administrative & support | 2017 |
| IM Automation Ltd. | Construction | 2024 |
| IM2 - Interim Manager Mittelstand Ltd | Wholesale & retail | 2005 |
| Image Plus Limited | Manufacturing | 2004 |
| Imageworks Design Ltd | Construction | 2015 |
| Imax Malt Limited | Wholesale & retail | 2025 |
| IMJ Valeting Ltd | Administrative & support | 2025 |