| Holden Spring Limited | Water & waste | 1993 |
| Holdenbeck Limited | Professional & scientific | 2009 |
| Holgate Construction Limited | Extraterritorial | 1990 |
| Holgate Engineering Sales & Service Limited | Construction | 1997 |
| Holgate Excavations Limited | Mining & quarrying | 1990 |
| Hollywood Nails 33 Ltd | Other services | 2019 |
| Holmes Antiques Ltd | Wholesale & retail | 2022 |
| Home Buy Carpets Ltd | Administrative & support | 2017 |
| Home Energy Group Ltd | Other services | 2019 |
| Home Havens Real Estate Limited | Real estate | 2025 |
| Home Switch Limited | Wholesale & retail | 2013 |
| Honest Health & Well-Being Ltd | Administrative & support | 2021 |
| Hooria KLY Ltd | Wholesale & retail | 2022 |
| Hope House Holidays Limited | Real estate | 2025 |
| Hope House Properties Ltd | Real estate | 2021 |
| Horizon Asset Holdings Ltd | Real estate | 2022 |
| Horsley & Feather Limited | Administrative & support | 2007 |
| Horton & Armitage Limited | Manufacturing | 1996 |
| Houghside Properties Limited | Administrative & support | 2010 |
| Hound and Heralds Limited | Manufacturing | 2022 |
| House Decor Interiors Limited | Wholesale & retail | 2019 |
| House Decor Ltd | Extraterritorial | 2023 |
| House of Diamonds Limited | Information & communication | 2019 |
| House of Sweets Limited | Wholesale & retail | 2017 |
| HOUSEFLIP1 Ltd | Real estate | 2025 |
| Howarth Industrial Saws Limited | Manufacturing | 1973 |
| Howden Hall Country Furniture Limited | Manufacturing | 2004 |
| Hows Your Head Wigs Ltd | Wholesale & retail | 2020 |
| HPA 2024 Limited | Professional & scientific | 2012 |
| HPA Car Sales Ltd | Wholesale & retail | 2022 |
| HPA Offices Ltd | Professional & scientific | 2020 |
| HPS Heating & Cooling Ltd | Professional & scientific | 2020 |
| HQ Banqueting Hall Limited | Hospitality | 2016 |
| HR Property Managemnt Ltd | Construction | 2026 |
| HRB Commercial Property Management Limited | Real estate | 2018 |
| HRC Analysis Limited | Professional & scientific | 2017 |
| HRM Business Services Limited | Professional & scientific | 2007 |
| HRP Consultancy Limited | Information & communication | 2006 |
| HS Delivery Ltd | Transport & logistics | 2025 |
| HSG 1 Limited | Health & social care | 2013 |
| HSG Property Investments Ltd | Real estate | 2022 |
| HSH Care & Support Ltd Ltd | Health & social care | 2026 |
| Hugh Stanley Associates Limited | Administrative & support | 2007 |
| Hughes Bars Limited | Hospitality | 2018 |
| Hughes Lift Services Ltd | Construction | 2013 |
| Hughes PM Ltd | Construction | 2017 |
| Hull Sports Therapy Ltd | Health & social care | 2024 |
| Humaira's Art, Craft & Design Limited | Wholesale & retail | 2017 |
| Humancode Ltd | Information & communication | 2025 |
| Hungry TED Limited | Hospitality | 2025 |
| Hunter Rendering Limited | Construction | 2021 |
| Hurtley Properties Limited | Real estate | 2025 |
| Hurtsworth Mechanical Services Limited | Construction | 2025 |
| Hussain Building Contractors Ltd | Construction | 2024 |
| Hussains CA Ltd | Professional & scientific | 2009 |
| Hussains CPA Ltd | Professional & scientific | 2018 |
| Hustlergate Coffee Ltd | Hospitality | 2024 |
| HV Engineering Ltd | Construction | 2007 |
| Hybrid & Electric Solutions Ltd | Wholesale & retail | 2021 |
| Hydro Chute Ltd | Manufacturing | 2021 |
| Hydro Yorkshire Limited | Manufacturing | 2021 |
| Hypo Detailing Ltd | Wholesale & retail | 2025 |
| I a Automotive Ltd | Wholesale & retail | 2022 |
| I a V Services Ltd | Professional & scientific | 2008 |
| I Ahmed Consultants Limited | Administrative & support | 2015 |
| I H Autos Centre Limited | Wholesale & retail | 2025 |
| I Love Work Limited | Administrative & support | 2009 |
| I Plant (Yorkshire) Limited | Construction | 2015 |
| I'D Like to BE Ltd | Wholesale & retail | 2011 |
| IAB - LAB (Holdings) Limited | Administrative & support | 2015 |
| IAB - LAB Limited | Construction | 1990 |
| Iain Harris Physiosolutions Limited | Health & social care | 2015 |
| IAN King Electrical Limited | Construction | 2008 |
| IAS Financial Services Ltd | Professional & scientific | 2018 |
| IBA (Holdings) Ltd | Professional & scientific | 2011 |
| Ibrahim Gold Making Limited | Manufacturing | 2024 |
| IC Bespoke Tiling Limited | Construction | 2020 |
| IC Bespoke Wetrooms Limited | Construction | 2025 |
| IC Beverage Ltd | Wholesale & retail | 2025 |
| IC Refurbishment & Restorations Limited | Construction | 2026 |
| ICARE4U Limited | Health & social care | 2011 |
| Ice Roll Factory Limited | Hospitality | 2017 |
| Iced Silsden Ltd | Wholesale & retail | 2023 |
| Icode Academy Ltd | Information & communication | 2015 |
| Icon Properties and Lettings Limited | Real estate | 2025 |
| Iconic Beauty 11 Ltd | Other services | 2025 |
| Icsat LLP | | 2012 |
| Ideabean Software Technology Ltd | Information & communication | 2017 |
| Ignition LAB Design Ltd | Professional & scientific | 2025 |
| Ihsan Homes Limited | Households | 2024 |
| IL Trovatore (Ilkley-Malaga) Limited | Extraterritorial | 1983 |
| Imaan Tour Limited | Administrative & support | 2017 |
| Imagine Hair Ltd | Other services | 2013 |
| Immedicare LLP | | 2013 |
| Impressions Engraving and Chemical Etching Ltd | Manufacturing | 2012 |
| Improving Care Consultancy Ltd | Professional & scientific | 2020 |
| Imran Goldsmith Limited | Wholesale & retail | 2023 |
| IMS Site Management & Carpentry Limited | Construction | 2007 |
| Imssupportedhousing Ltd | Real estate | 2025 |
| IN Need of a Hand Private Home Care Limited | Health & social care | 2015 |