| Inaaya Lettings Ltd | Real estate | 2026 |
| Inclusive Psychology in Yorkshire Limited | Education | 2017 |
| Independent GAS Solutions Limited | Wholesale & retail | 2024 |
| Independent Health Visiting Services Limited | Health & social care | 2018 |
| India Restaurant Limited | Hospitality | 2015 |
| Indulge Chicken Ltd | Hospitality | 2024 |
| Indulgence Beauty & Microblading Ltd | Other services | 2019 |
| Industrialo Limited | Administrative & support | 2022 |
| Industry Barista Ltd | Hospitality | 2018 |
| Indy Coffee Limited | Hospitality | 2017 |
| Infago Ltd | Information & communication | 2018 |
| Inference Technologies Ltd | Information & communication | 2025 |
| INFILTR8 Ltd | Information & communication | 2024 |
| Infinite Travel Ltd | Administrative & support | 2023 |
| Infinity Leisure UK Ltd | Professional & scientific | 2022 |
| Infrai Holdings Ltd | Financial services | 2026 |
| Infrai Operations Ltd | Real estate | 2026 |
| Infrastructure Security Solutions Ltd | Administrative & support | 2013 |
| Inghams Design and Build Limited | Manufacturing | 2000 |
| Ingleby Developments Limited | Construction | 2018 |
| Ingrow Autos Limited | Wholesale & retail | 2018 |
| Ingrow Limited | Real estate | 2021 |
| Ingrow MOT Centre Limited | Wholesale & retail | 2020 |
| Ingrow Tyres Limited | Wholesale & retail | 2020 |
| INK Rethink Limited | Wholesale & retail | 2019 |
| Innoscape Ltd | Administrative & support | 2015 |
| Inns & Homes Limited | Real estate | 2021 |
| INR Investment Limited | Real estate | 2022 |
| Insight Coaching for Leaders Ltd | Administrative & support | 2020 |
| Intake Management Solutions Limited | Professional & scientific | 2015 |
| Integrated Educational Foundation Ltd | Education | 2016 |
| Integrated Laboratory Solutions LLP | | 2016 |
| Integrated Pathology Solutions LLP | | 2016 |
| Intellicomms Limited | Information & communication | 2013 |
| Inter City Money Limited | Financial services | 2001 |
| Intercontrol Metering Pumps Limited | Wholesale & retail | 2021 |
| International Sourcing Company Limited | Extraterritorial | 2012 |
| International Stress Relief Limited | Administrative & support | 2020 |
| Intime 247 Limited | Transport & logistics | 2025 |
| Into Sofa Ltd | Real estate | 2004 |
| Intrica Limited | Information & communication | 1992 |
| Invane Ltd | Information & communication | 2023 |
| Invent Interior Solutions Limited | Manufacturing | 2005 |
| Invest UP North Ltd | Hospitality | 2020 |
| Investway Holdings Ltd | Real estate | 2025 |
| Invincible Structures Ltd | Manufacturing | 2024 |
| ION Games Ltd | Information & communication | 2018 |
| Ionic Pharma Ltd | Wholesale & retail | 2020 |
| IP Investments 1 Limited | Real estate | 2026 |
| Ipwl Limited | Manufacturing | 2007 |
| IQ Auto Parts UK Ltd | Wholesale & retail | 2026 |
| IQ Portraits Ltd | Professional & scientific | 2009 |
| IQ Property Developments Ltd | Real estate | 2019 |
| Iqbal Food-To-Go Ltd | Wholesale & retail | 2019 |
| Iqbal FTG Catering Ltd | Hospitality | 2026 |
| Iraj Imran Care Services Limited | Health & social care | 2025 |
| Ironveil IT Group Ltd | Other services | 2026 |
| ISA Food Supplies Limited | Hospitality | 2023 |
| Ishaq Real Estate Limited | Real estate | 2024 |
| Ishtiyak Mahomed Limited | Health & social care | 2011 |
| Ishys Kitchen Indian Takeaway Ltd | Hospitality | 2020 |
| IT Aiml Ltd | Information & communication | 2024 |
| Iuno Ltd | Education | 2024 |
| Ivory Crafts Ltd | Wholesale & retail | 2024 |
| IVY Technologies Ltd | Information & communication | 2019 |
| IZH Transport Services Limited | Transport & logistics | 2018 |
| Izvg LLP | | 2011 |
| J & G Car Sales Limited | Wholesale & retail | 2026 |
| J & L Stoves Limited | Wholesale & retail | 2020 |
| J and N Feather Construction LLP | | 2012 |
| J Bentley Fabrications Limited | Manufacturing | 2002 |
| J C Cowgill Ltd | Administrative & support | 2017 |
| J C Plastering & Rendering Limited | Construction | 2019 |
| J D H Mechanical Engineering Limited | Manufacturing | 2016 |
| J J Ferns Limited | Health & social care | 2023 |
| J M Electrical (Keighley) Limited | Energy | 2011 |
| J Matthews Property Services Limited | Construction | 2012 |
| J R Fabrications Limited | Construction | 2024 |
| J S Electrical Installations Ltd | Construction | 2018 |
| J U M Properties Limited | Real estate | 2024 |
| J Wood Leathers Limited | Wholesale & retail | 2000 |
| J-Formitt Ltd | Manufacturing | 2020 |
| J. and H. Property Management Limited | Real estate | 1999 |
| J. and N. Feather Limited | Construction | 2005 |
| J. H. and E Limited | Real estate | 2023 |
| J.A Motors Limited | Wholesale & retail | 2011 |
| J.A.K. Travel Ltd. | Administrative & support | 2003 |
| J.Hitch Limited | Financial services | 2025 |
| J.K Foods Silsden Ltd | Hospitality | 2025 |
| J.Stell & Sons,Limited | Manufacturing | 1930 |
| J.T.S. (Cushions) Ltd | Manufacturing | 2001 |
| J.V.M. (Haworth) Limited | Transport & logistics | 1977 |
| J.Wild(Confectioners)Limited | Manufacturing | 1939 |
| Jaaras Ltd | Wholesale & retail | 2024 |
| Jack Croft Oil.Servicing Ltd | Construction | 2022 |
| Jacks Catering Supplies Ltd | Wholesale & retail | 2022 |
| Jackson Renewable & Electrical Services Limited | Construction | 2022 |
| Jackson's of Silsden (1988) Limited | Transport & logistics | 1988 |
| Jacs Supply Chain Consultants Ltd | Administrative & support | 2012 |
| Jadamedo Consulting Limited | Professional & scientific | 2025 |