| I&R Medical Solutions Ltd | Health & social care | 2016 |
| IA Strategies Ltd | Professional & scientific | 2022 |
| Ice Blue Marketing (Solutions) Ltd | Wholesale & retail | 2022 |
| Ijustice Limited | Financial services | 2000 |
| Imran Autos Ltd | Wholesale & retail | 2025 |
| Imran Patel Holdings Limited | Real estate | 2021 |
| Imran's Alfatek Ltd | Transport & logistics | 2024 |
| IN Health and Fitness Ltd | Arts & recreation | 2019 |
| Industrial Assets Ltd | Professional & scientific | 2024 |
| Innsight Design Limited | Professional & scientific | 2003 |
| Integrated Protection & Medical Group Ltd | Administrative & support | 2025 |
| Iron AXE Consultancy Limited | Professional & scientific | 2024 |
| ISH Joinery Ltd | Construction | 2025 |
| Iwaad Ltd | Real estate | 2018 |
| J & D Strangeway Ltd | Construction | 2016 |
| J Foster Construction Ltd | Manufacturing | 2003 |
| J Weston Campbell & Co Limited | Administrative & support | 2019 |
| J. C. Rawlings Plasterers Limited | Construction | 2009 |
| J40 Carpets and Floors Ltd | Construction | 2025 |
| James Hamill Building Services Ltd | Construction | 2024 |
| James Kelly PDH (UK) Ltd | Transport & logistics | 2012 |
| Jays Sleighs Ltd | Manufacturing | 2021 |
| JCL Fire Limited | Professional & scientific | 2017 |
| JCS Site Services Ltd | Construction | 2025 |
| JD Caterers Ltd | Hospitality | 2024 |
| JD Strangeway Ltd | Construction | 2022 |
| JJ Custom Creations Ltd | Manufacturing | 2022 |
| JJ Properties (Yorkshire) Limited | Real estate | 2014 |
| Jjroy Limited | Administrative & support | 2020 |
| JLC Car Group Ltd | Wholesale & retail | 2026 |
| JO & LD Properties Limited | Real estate | 2024 |
| Jobe Joinery Ltd | Construction | 2025 |
| John Brooke Builders Ltd | Construction | 2013 |
| Jonathan Law Management Services Ltd | Extraterritorial | 2020 |
| JPM Investment Group Limited | Financial services | 2023 |
| JPM Services (Yorkshire) Ltd | Real estate | 2023 |
| JRZ Sales Ltd | Wholesale & retail | 2022 |
| JS2 Engineering Supplies Ltd | Wholesale & retail | 2025 |
| JV Commercials Ltd | Wholesale & retail | 2016 |
| K Ingleson Holdings Ltd | Professional & scientific | 2025 |
| K W Sales Consultants Limited | Administrative & support | 2013 |
| Kasam Motors Ltd | Wholesale & retail | 2024 |
| Kavik Ltd | Wholesale & retail | 2016 |
| KCL Recovery,S Ltd | Transport & logistics | 2018 |
| KG Architectural Metalwork Ltd | Construction | 2024 |
| Kimm Butchers Limited | Wholesale & retail | 2016 |
| Kirkgate Engineering Limited | Manufacturing | 2020 |
| KSA Trading Ltd | Wholesale & retail | 2025 |
| KSH Joinery Ltd | Construction | 2025 |
| KTC Compressors UK Limited | Manufacturing | 2022 |
| KW Leasing Limited | Administrative & support | 2019 |
| L H Engineering Dewsbury Limited | Manufacturing | 2003 |
| Lakeside Weddings Limited | Other services | 2023 |
| Lamour Beds Group Ltd | Wholesale & retail | 2025 |
| Lavish Furnishings Limited Limited | Wholesale & retail | 2025 |
| LB Hightown Ltd | Hospitality | 2018 |
| Lbregistrations Ltd | Wholesale & retail | 2026 |
| LDC Engineering Limited | Manufacturing | 2008 |
| Leading Edge Facilities Limited | Administrative & support | 2025 |
| Leading Edge Signage and Graphics Limited | Professional & scientific | 2008 |
| Learn Grow BE Group Limited | Administrative & support | 2022 |
| Leopard Music Limited | Information & communication | 2002 |
| Leyden CNC Limited | Manufacturing | 2016 |
| Lievesley Limited | Information & communication | 2017 |
| Linear Surveys Limited | Professional & scientific | 2010 |
| Liopetro Holding Ltd | Real estate | 2025 |
| Liqd Ltd | Wholesale & retail | 2025 |
| Little Rainbows Day Nursery & OUT of School Club Ltd | Health & social care | 2016 |
| Liversedge FC (Clayborn) Limited | Arts & recreation | 2011 |
| Liversedge Lettings Limited | Real estate | 2022 |
| Liviana Limited | Professional & scientific | 2003 |
| LJ and Co Accounting Solutions Ltd | Professional & scientific | 2024 |
| LKL TEC Limited | Manufacturing | 2009 |
| Locala Community Partnerships C.I.C. | Health & social care | 2011 |
| Locala Homecare Limited | Health & social care | 2013 |
| Locala Innovation Limited | Financial services | 2026 |
| Locala Pathways Limited | Financial services | 2026 |
| Locala Private Healthcare Ltd | Financial services | 2025 |
| Locala Social Care Limited | Financial services | 2026 |
| Locala Solutions Ltd | Financial services | 2025 |
| Locumise Ltd | Wholesale & retail | 2019 |
| Lola's Lounge Dog Grooming Limited | Other services | 2025 |
| LOW Street Garage Bodywork and Vehicle Storage Ltd | Wholesale & retail | 2015 |
| LPI Group Ltd | Financial services | 2026 |
| LQH Goods Ltd | Wholesale & retail | 2021 |
| LT Financial Services Limited | Professional & scientific | 2024 |
| Luddites Revenge Ltd | Information & communication | 2016 |
| Lumb Mews Management Company Limited | Households | 2017 |
| M Arnold Electrical Limited | Construction | 2020 |
| M Build W.Y Ltd | Construction | 2024 |
| M J Rounding Design Ltd | Manufacturing | 2018 |
| Magic Products (UK) Limited | Extraterritorial | 2009 |
| Makzak Commercials Limited | Real estate | 2024 |
| Manor Park Miniature Railway Ltd | Arts & recreation | 2026 |
| March Engineering Design Services Limited | Professional & scientific | 2008 |
| Markden (City Homes) Limited | Construction | 2009 |
| Markden (Wrenbury Projects) Limited | Construction | 2021 |
| Markden Limited | Professional & scientific | 2004 |
| Martyn's Property Services Limited | Construction | 2012 |
| Masthouse Ltd | Professional & scientific | 2023 |