| Husnain Optical Services Ltd | Wholesale & retail | 2023 |
| I.S.L. (Systems) Limited | Information & communication | 1997 |
| Ibbyk Ltd | Wholesale & retail | 2026 |
| Icebreaker Bands Ltd | Wholesale & retail | 2015 |
| Icon Injury Specialists Limited | Administrative & support | 2020 |
| IEI Health Limited | Wholesale & retail | 2025 |
| IH Medicines Ltd | Wholesale & retail | 2026 |
| Ikhbaat Limited | Wholesale & retail | 2025 |
| Imaging Diagnostic Enterprise Limited | Health & social care | 2025 |
| Indicanos Heckmondwike Ltd | Hospitality | 2025 |
| Indifold Doors Limited | Wholesale & retail | 2020 |
| Industrial Design Services Ltd | Professional & scientific | 2026 |
| Infusion IT Ltd | Administrative & support | 2017 |
| Inky Kimi Art Limited | Arts & recreation | 2022 |
| Innovalink Ltd | Financial services | 2024 |
| Intoo Skills Limited | Real estate | 2012 |
| Iron Arms Amateur Boxing Gym CIC | Arts & recreation | 2024 |
| Iron Arms Boxing & Fitness Gyms Ltd | Arts & recreation | 2024 |
| Isaam Ltd | Real estate | 2009 |
| ISL (Computers) Limited | Information & communication | 2005 |
| J Milner Plumbing & Heating Ltd | Construction | 2023 |
| J R Rentals Limited | Real estate | 2022 |
| J S Khan OPT Limited | Health & social care | 2022 |
| J Tofts Design Limited | Professional & scientific | 2014 |
| Jabz Distribution Ltd | Other services | 2024 |
| Jackmar ICF Build Ltd | Construction | 2013 |
| Jacksons Food Service Limited | Wholesale & retail | 2013 |
| Jaja Motors Yorkshire Ltd | Wholesale & retail | 2022 |
| James Wilby Group Limited | Financial services | 2025 |
| James Wilby Logistics Limited | Transport & logistics | 2022 |
| Jaoh Ltd | Real estate | 2019 |
| Jezz Noor Ltd | Professional & scientific | 2005 |
| JJ Concrete Ltd | Manufacturing | 2025 |
| Jlaba Holdings Limited | Administrative & support | 2026 |
| JLD Solutions Ltd | Professional & scientific | 2019 |
| JLI Fabrication and Welding Ltd | Construction | 2022 |
| Jlmotorgroup Ltd | Wholesale & retail | 2018 |
| JNA Properties Limited | Real estate | 2022 |
| JNR Housing Ltd | Real estate | 2026 |
| JR Realty Ltd | Real estate | 2024 |
| Junction Pharma Limited | Health & social care | 2018 |
| K R Packaging Limited | Wholesale & retail | 2024 |
| Kaktus Group Ltd | Wholesale & retail | 2025 |
| KARTHI13 Limited | Wholesale & retail | 2026 |
| Kashmir Takeaway Limited | Hospitality | 2026 |
| Kdsdddhd Holdings Limited | Administrative & support | 2026 |
| Khayam Javed Ltd | Health & social care | 2013 |
| KI Destiny Cleaning Ltd | Administrative & support | 2025 |
| Kiranimperials Ltd | Wholesale & retail | 2026 |
| KJH Single PLY Roofing Limited | Construction | 2024 |
| Knight Consultancy Ltd | Professional & scientific | 2025 |
| Knitty-Gritty Ltd | Wholesale & retail | 2015 |
| Krazy Kids Limited | Health & social care | 2022 |
| Kwan GAM Ltd | Hospitality | 2018 |
| Kylie Pearse Ltd | Construction | 2025 |
| L&K Industrial Flooring Ltd | Construction | 2019 |
| LA Romantica Beds Limited | Manufacturing | 2005 |
| Laaam Trading Ltd | Wholesale & retail | 2024 |
| LAF Accountants Ltd | Professional & scientific | 2022 |
| Lahori Nashta & Takeaway Limited | Hospitality | 2025 |
| Lakeland Awnings Limited | Manufacturing | 2013 |
| Laly Classy Nails and Beauty Ltd | Other services | 2023 |
| Lauri Sigma Ltd | Manufacturing | 2016 |
| Layezee Beds Ltd | Manufacturing | 2024 |
| Lazy Night Ltd | Manufacturing | 2026 |
| LC Vibe Shop Ltd | Wholesale & retail | 2026 |
| LCL Estates Ltd | Real estate | 2024 |
| LE Soleil (UK) Limited | Other services | 2013 |
| Lead Grow NOW LLP | | 2019 |
| LEH Holmes Ltd | Real estate | 2025 |
| Lifestyle Properties (Bradford) Ltd | Real estate | 2018 |
| Lime Tree Boutique Limited | Wholesale & retail | 2018 |
| Lionwood Studio Ltd | Information & communication | 2026 |
| Living of Brighouse Ltd | Wholesale & retail | 2014 |
| Lodgecloud Limited | | 1984 |
| Lojo Holdings Ltd | Information & communication | 2025 |
| Love Lime Tree Ltd | Wholesale & retail | 2025 |
| Lunex Services Limited | Administrative & support | 2025 |
| Lush Beds Direct Ltd | Wholesale & retail | 2021 |
| M Baqir Consultants Limited | Administrative & support | 2017 |
| M W Energy Solutions Ltd | Other services | 2023 |
| M&W Groundworks Ltd | Construction | 2013 |
| M.Hanif Group Ltd | Real estate | 2025 |
| MAC Distribution Limited | Extraterritorial | 2017 |
| Macaronessuk Limited | Wholesale & retail | 2024 |
| Majeraone Ltd | Information & communication | 2026 |
| Majestic Manor Limited | Wholesale & retail | 2026 |
| Makzak Takeaways Limited | Hospitality | 2026 |
| Maltas Properties Limited | Real estate | 2023 |
| Malvar Engineering Limited | Professional & scientific | 2014 |
| Manu's Imports & Exports Ltd | Wholesale & retail | 2025 |
| Marjaangroup Ltd | Wholesale & retail | 2026 |
| Market Fisheries Limited | Hospitality | 2004 |
| Marketsync LLP | | 2024 |
| Martins Transport Ltd | Transport & logistics | 2016 |
| Maryamjoptics Ltd | Wholesale & retail | 2025 |
| Masa Express Ltd | Wholesale & retail | 2023 |
| Masood Pharma Ltd | Wholesale & retail | 2024 |
| Mave Group (Holdings) Ltd | Extraterritorial | 2020 |
| Mave Limited | Administrative & support | 2009 |