| KJ Gold (Dewsbury) Limited | Wholesale & retail | 2026 |
| KJ Gold Limited | Wholesale & retail | 2022 |
| Kkkjwn Limited | Health & social care | 2025 |
| KM Sustainable Engineering Solutions Limited | Professional & scientific | 2025 |
| Kmazur Limited | Transport & logistics | 2015 |
| Knight CUE Sports (UK) Ltd | Wholesale & retail | 2025 |
| Knight Sleep Limited | Wholesale & retail | 2019 |
| Knives Down Gloves UP Ltd | Education | 2025 |
| Koby Health Care Limited | Health & social care | 2015 |
| Koiri Ltd | Health & social care | 2009 |
| Koko Hair N0.2 Ltd | Other services | 2026 |
| Kola Associates Limited | Professional & scientific | 2026 |
| Kola Lighting Ltd | Wholesale & retail | 2022 |
| Kongdeliveries Ltd | Transport & logistics | 2026 |
| Koolkidsplus Limited | Wholesale & retail | 2018 |
| Koolkidzplus Ltd | Wholesale & retail | 2018 |
| Kothia Investments Limited | Health & social care | 2016 |
| Kozi Fashion Limited | Manufacturing | 2002 |
| Krazy Kingdom Ltd | Arts & recreation | 2014 |
| KS Health Ltd | Health & social care | 2024 |
| KS Partnership LLP | | 2023 |
| KSA Consultants Ltd | Professional & scientific | 2021 |
| KST Interiors Ltd | Wholesale & retail | 2025 |
| KT 29 Solutions Ltd | Transport & logistics | 2024 |
| KT Media Ltd | Professional & scientific | 2026 |
| Kumobeds Ltd | Wholesale & retail | 2026 |
| Kuona Clinic Limited | Health & social care | 2024 |
| Kynaston Forwarding Limited | Financial services | 2017 |
| L S Engineering Site Services Limited | Construction | 2016 |
| L'Or Traders Ltd | Manufacturing | 2023 |
| LA Groundworks & Landscaping Ltd | Construction | 2024 |
| LA Myrna Ltd | Manufacturing | 2017 |
| LA Vida Beds Limited | Wholesale & retail | 2025 |
| Ladha Bros (UK) Ltd | Wholesale & retail | 2018 |
| Ladha Enterprises Ltd | Real estate | 2018 |
| Ladha Holdings Ltd | Professional & scientific | 2024 |
| Ladies First Private Hire Limited | Transport & logistics | 2024 |
| Lahori Tawa House Ltd | Hospitality | 2025 |
| Laiba Travels Ltd | Transport & logistics | 2026 |
| Lakhi Optical Ltd | Public administration | 2025 |
| Laksy Trades Ltd | Wholesale & retail | 2023 |
| Lala Motors Yorkshire Ltd | Wholesale & retail | 2025 |
| Lamteks Ltd | Wholesale & retail | 2013 |
| Lanesborough Properties Limited | Construction | 1993 |
| Langtins Limited | Wholesale & retail | 2024 |
| Launch.Bz Ltd | Information & communication | 2023 |
| Laundryloungedewsbury Ltd | Other services | 2024 |
| Laurel Mattresses UK Ltd | Wholesale & retail | 2020 |
| Laurentiu-Ionut Andreca Healthcare Ltd | Health & social care | 2025 |
| Lavsih Ltd | Wholesale & retail | 2020 |
| Layer & Coat Ltd | Construction | 2026 |
| Layers Logistics Ltd | Transport & logistics | 2023 |
| Layyin Ltd | Wholesale & retail | 2023 |
| LCA Clarity Ltd | Professional & scientific | 2026 |
| Leading Aspirations Residential Limited | Health & social care | 2024 |
| Leagueglobal Limited | | 1990 |
| Learn.Org.Uk Limited | Education | 2004 |
| Leathers R US Ltd | Wholesale & retail | 2013 |
| Leeds Haematology Ltd. | Health & social care | 2003 |
| Lees Hall 1957 Limited | Extraterritorial | 2013 |
| Leevers Decorators Ltd | Construction | 2023 |
| Leg-Invest Ltd | Real estate | 2026 |
| Legacy Resourcing Ltd | Administrative & support | 2013 |
| Legend Barbers (Dewsbury) Ltd | Other services | 2019 |
| Lennox Learning and Development Ltd | Professional & scientific | 2013 |
| Leosandu Construction Limited | Construction | 2023 |
| Levi Dynamics Limited | Education | 2025 |
| Lewis’S Disco & Karaoke Entertainment World Ltd | Administrative & support | 2025 |
| Lexis Cars Ltd | Wholesale & retail | 2024 |
| Lgcy-Inv Ltd | Real estate | 2020 |
| LHC Consulting Ltd | Professional & scientific | 2019 |
| Libaas Ltd | Wholesale & retail | 2011 |
| Libco Construction Ltd | Construction | 2022 |
| Lifestyle Network Ltd | Professional & scientific | 2026 |
| Lifeworks Academy Ltd | Education | 2020 |
| Lifeworks Community Projects Ltd | Education | 2022 |
| Lifted Culture Ltd | Wholesale & retail | 2025 |
| Liftrain Limited | Education | 2024 |
| Lima Car Sales Ltd | Wholesale & retail | 2025 |
| Linga Bhairavi Homes Limited | Real estate | 2025 |
| Link Contract Cleaning Ltd | Administrative & support | 2022 |
| Link Contract Consultants Ltd | Wholesale & retail | 1979 |
| Linkline Ltd | Transport & logistics | 2026 |
| Liontech Studios Ltd | Information & communication | 2016 |
| Liquid Mafia Ltd | Wholesale & retail | 2017 |
| Lira Contracting Ltd | Wholesale & retail | 2020 |
| Lishman Associates Ltd | Financial services | 2020 |
| Little Wonders (Early Years) Limited | Health & social care | 2017 |
| Livewire Drinks Limited | Wholesale & retail | 2024 |
| Living Logistics Ltd | Professional & scientific | 2013 |
| Lizaa Ltd | Wholesale & retail | 2021 |
| LJF Worksurfaces Limited | Construction | 2017 |
| Llana Design Services Limited | Professional & scientific | 2017 |
| Locksmith Leeds Ltd | Other services | 2024 |
| LOG 2020 Limited | Wholesale & retail | 2020 |
| Logistra Ltd | Transport & logistics | 2025 |
| Loka Chai Limited | Hospitality | 2025 |
| London Eskimo Ltd | Manufacturing | 2019 |
| Longside Distribution UK Ltd | Wholesale & retail | 2013 |
| Lonkosi Intergrated Health Ltd | Administrative & support | 2025 |