| Home Rewires Ltd | Construction | 2023 |
| HOO Hole Limited | Real estate | 2016 |
| Hookstone Dental Care Ltd | Health & social care | 2019 |
| Hopley Engineering Ltd | Professional & scientific | 2015 |
| Hot Property Network R Ltd | Real estate | 2025 |
| Howarths Removals of Todmorden Ltd | Transport & logistics | 2021 |
| Hrbf Ltd | Administrative & support | 2021 |
| HSG Consultancy Limited | Wholesale & retail | 2020 |
| HTF Contracting Ltd | Administrative & support | 2022 |
| HW Mortgage Solutions Ltd | Financial services | 2023 |
| HX7 Ltd | Extraterritorial | 2016 |
| Hybrid ME Limited | Wholesale & retail | 2015 |
| I P & R Gledhill Ltd | Wholesale & retail | 2016 |
| IAN Nicholls Plumbing and Heating Ltd | Construction | 2018 |
| Ibbm Access Ltd | Construction | 2026 |
| Ichipru Limited | Hospitality | 2019 |
| Ifix HB Ltd | Wholesale & retail | 2023 |
| Ifp-Labs UK Limited | Financial services | 2022 |
| Ifp-Labs UK West Yorkshire Limited | Professional & scientific | 1992 |
| Iggy Electrical Ltd | Construction | 2025 |
| Imagebrook Limited | Arts & recreation | 1981 |
| Imagine Results Limited | Professional & scientific | 2006 |
| Immersive Networks Collective Ltd | Information & communication | 2020 |
| Imogen Bowers Consulting Limited | Professional & scientific | 2009 |
| Imover Consultancy Limited | Information & communication | 2016 |
| IN a Land CIC | Wholesale & retail | 2025 |
| IN the Dog House AS Limited | Other services | 2025 |
| In:Quality Limited | Information & communication | 2015 |
| Independent Rack Surveys Limited | Professional & scientific | 2009 |
| Infinity Fundraising Ltd | Professional & scientific | 2026 |
| INS Resource Planning Limited | Administrative & support | 2010 |
| Insane Automotive Ltd | Wholesale & retail | 2023 |
| Inspiring Health Limited | Health & social care | 2009 |
| Iris Possibilities CIC | Health & social care | 2024 |
| It&D Ltd | Information & communication | 2024 |
| Itech Distributions Group Ltd | Wholesale & retail | 2025 |
| J & D Hudson Limited | Agriculture & fishing | 2019 |
| J & E Holmes Ltd | Construction | 2017 |
| J & L Spencer Ltd | Agriculture & fishing | 2022 |
| J & M Plasterers & Coloured Renderers Ltd | Construction | 2019 |
| J and M Renewables Ltd | Construction | 2023 |
| J Hopkins Ltd | Mining & quarrying | 2011 |
| J L Focus Ltd | Construction | 2019 |
| J R Townfield Projects Ltd | Construction | 2026 |
| J&Z Properties Ltd | Real estate | 2019 |
| J. Lery Limited | Health & social care | 2010 |
| J.A. Whitehead Services (Littletown) Limited | Administrative & support | 1958 |
| Jack Wallington Garden Design Limited | Professional & scientific | 2016 |
| James Shepherd Car Sales Ltd | Wholesale & retail | 2018 |
| James Shepherd of Hebden Bridge Limited | Wholesale & retail | 1991 |
| Jamesrm Holdings Ltd | Financial services | 2024 |
| Jana and Mark Ltd | Hospitality | 2026 |
| JAS Property and Lettings Ltd | Real estate | 2019 |
| JC Cleaning and Removal Services Ltd | Administrative & support | 2024 |
| JC Estates Yorkshire Ltd | Construction | 2015 |
| Jc's Pet Group Ltd | Wholesale & retail | 2023 |
| JDP Honey Ltd | Manufacturing | 2020 |
| Jenji Ltd | Professional & scientific | 2021 |
| Jess Drake Creative Speech and Language Therapy Ltd | Administrative & support | 2016 |
| JLH Independent Services Ltd | Real estate | 2019 |
| JLT Sales Management Ltd | Professional & scientific | 2019 |
| JN Properties Limited | Construction | 2010 |
| Jody Clarke Ltd | Information & communication | 2021 |
| JOE Standerline Ltd | Administrative & support | 2012 |
| John King Builder Ltd | Construction | 2022 |
| Jojos Halifax Ltd | Hospitality | 2025 |
| JON Knowles Training Limited | Education | 2011 |
| Jonathan Woodward Architect Ltd | Professional & scientific | 2020 |
| JPD Service & Installation Ltd | Construction | 2018 |
| Jpksales Ltd | Professional & scientific | 2020 |
| JSB Interiors Ltd | Construction | 2012 |
| Just Melanie Limited | Other services | 2015 |
| JVL Homewares (UK) Limited | Wholesale & retail | 2013 |
| K9SPLASH Limited | Professional & scientific | 2015 |
| Kajc Ltd | Professional & scientific | 2024 |
| Kathy Mytton Art & Design Limited | Arts & recreation | 2008 |
| KB Contractors (Yorkshire) Ltd | Construction | 2022 |
| KEN Wheelwright Restorations Ltd | Wholesale & retail | 2015 |
| Kendell Properties Ltd | Real estate | 2019 |
| Kerf Group Holdings Limited | Professional & scientific | 2019 |
| Ketz Group Limited | Hospitality | 2025 |
| KF Financial Ltd | Financial services | 2023 |
| Kingham Construction Ltd | Construction | 2020 |
| Kiren's Hair & Beauty (Oakwood) Limited | Other services | 2016 |
| Kjsg Consulting Ltd | Real estate | 2008 |
| KLM Auctioneers Limited | Wholesale & retail | 2019 |
| KLN Scaffolding Ltd | Construction | 2018 |
| KR36 Investments Limited | Financial services | 2015 |
| KW Property Services (Yorkshire) Ltd | Construction | 2020 |
| L & M Imaging Systems Limited | Wholesale & retail | 1988 |
| L J Bray & Co Limited | Professional & scientific | 2012 |
| L Kempster Limited | Other services | 2013 |
| Lachlan Carter Surgical Services Limited | Health & social care | 2022 |
| Lakebeech Ltd. | Manufacturing | 2009 |
| Lane Head Farm Productions Ltd | Arts & recreation | 2014 |
| Launchpad Assistive Technology Ltd | Professional & scientific | 2013 |
| Lazarian Limited | Professional & scientific | 2014 |
| Leading Edge Studio Ltd | Information & communication | 2019 |
| Leanian Enterprises Limited | Wholesale & retail | 2015 |
| LEE Peasey Civil Engineers Limited | Construction | 2015 |