| LEE Kerry Consulting Limited | Arts & recreation | 2015 |
| LEE M Hawke Transport Ltd | Other services | 2023 |
| LEE Shaw Properties Limited | Real estate | 2023 |
| LEE Sorrell Media Ltd | Administrative & support | 2012 |
| LEE Walton Ltd | Construction | 2016 |
| Lee-Gas Limited | Construction | 2003 |
| Leecrest Management Company Limited | Households | 2003 |
| Leeder Safeguarding Training & Consultancy Ltd. | Education | 2019 |
| Leeds Futsal Partnership Limited | Arts & recreation | 2019 |
| Leeds Living Rentals Ltd | Real estate | 2021 |
| Leentech Limited | Information & communication | 1999 |
| Leetaf Care Ltd | Health & social care | 2024 |
| Legacy Financial Estate Planning Ltd | Professional & scientific | 2022 |
| Legacy Financial Ltd | Professional & scientific | 2020 |
| Legacy Home Improvement Solutions Limited | Construction | 2025 |
| Legacy Management Consultancy Limited | Professional & scientific | 2025 |
| Legacy MMA & Management Ltd | Arts & recreation | 2023 |
| Legal Counsel Ltd | Administrative & support | 2016 |
| Legion Group Global Limited | Administrative & support | 2021 |
| Legisto Ltd | Wholesale & retail | 2024 |
| Legix Employment Law Services Limited | Administrative & support | 2011 |
| Leisure Bar Finance Limited | Financial services | 2014 |
| Leisureplus UK Limited | | 1991 |
| Leith Fleet Maintenance Ltd | Wholesale & retail | 2020 |
| Lejato Civils Ltd | Construction | 2025 |
| Lema Nova Ltd | Health & social care | 2026 |
| Lemon Face Cards Ltd | Wholesale & retail | 2025 |
| LEN Shop Limited | Wholesale & retail | 2020 |
| Lenus Limited | Financial services | 2013 |
| Lenus Properties Ltd. | Real estate | 2018 |
| LEO Shad Ltd | Real estate | 2021 |
| Leon Grant Ltd | Manufacturing | 1999 |
| Leosoft Limited | Information & communication | 2025 |
| Lepik Builds Ltd | Construction | 2024 |
| Leslie Frances Elite Hairdressing & Training Limited | Other services | 2012 |
| LET IT Fast Limited | Real estate | 2010 |
| Lets Go Peak District Ltd | Professional & scientific | 2017 |
| Letwell Properties Limited | Real estate | 2007 |
| Letz Limited | Real estate | 2024 |
| Let’S by Summer Ltd | Real estate | 2026 |
| Levity Ventures Limited | Wholesale & retail | 2025 |
| Lewis Commissioning Services Ltd | Professional & scientific | 2009 |
| Lewis D White Groundworks Ltd | Construction | 2026 |
| Lewis Finance Property Ltd | Financial services | 2019 |
| Lewis Residential Lettings Limited | Real estate | 2024 |
| Lexport Logistics Ltd | Transport & logistics | 2022 |
| Leysoft Limited | Information & communication | 2026 |
| LFH Wealth Management Ltd | Financial services | 2019 |
| Lfsy Ltd | Administrative & support | 2024 |
| LG Woodcock Limited | Transport & logistics | 2025 |
| LGI Software Ltd | Information & communication | 2016 |
| LHE Systems Limited | Construction | 2026 |
| LHS Construction (Yorkshire) Ltd | Construction | 2015 |
| LI TAI NA Properties Limited | Real estate | 2024 |
| Liam’S Delivery Service Ltd | Transport & logistics | 2025 |
| Libmil Saint Ltd | Transport & logistics | 2025 |
| LIBUZY79 Limited | Health & social care | 2015 |
| Lick a Paint Limited | Wholesale & retail | 2015 |
| Lidget Compton Limited | Manufacturing | 1990 |
| Lidget Concrete Limited | Professional & scientific | 2008 |
| Lidiaotiliaart Ltd | Manufacturing | 2022 |
| Liepins Club House Ltd | Agriculture & fishing | 2025 |
| Liet Clinic Limited | Health & social care | 2022 |
| Life Afloat Boat Hire Ltd | Hospitality | 2025 |
| Life Jacket Education Group Ltd | Administrative & support | 2024 |
| Life Line Medical Ltd | Health & social care | 2018 |
| Lifecircuit Ltd | Professional & scientific | 2025 |
| Lifejacket Education Group North Ltd | Administrative & support | 2025 |
| Lifestrength Ltd | Health & social care | 2024 |
| Lifestyle Wealth Management Ltd | Financial services | 2013 |
| Lifetime Electrical Services Ltd | Construction | 2023 |
| Lift Move and Test Weight Hire Limited | Administrative & support | 2024 |
| Liftsign Ltd | Construction | 2026 |
| Light and Lace LP | | 2026 |
| Light Health Care Ltd | Administrative & support | 2020 |
| Light Vape Shop Ltd | Wholesale & retail | 2025 |
| Lightfoot's Cooperations Ltd | Real estate | 2026 |
| Lightfoot's Properties Ltd | Real estate | 2026 |
| Lightning Elite Group Ltd | Construction | 2020 |
| Like Minded (Yorkshire) Limited | Health & social care | 2026 |
| Lila Property Solutions Ltd | Real estate | 2025 |
| Lily's Lighting Collection Limited | Energy | 2015 |
| Lime B Ltd | Information & communication | 2015 |
| Lime Tree Nursery (Athersley) Ltd | Education | 2020 |
| Limelight at Whitwood Management Limited | Professional & scientific | 2006 |
| Limesway Ltd | Hospitality | 2022 |
| Limetrees Phase 2 Management Company Limited | Administrative & support | 2016 |
| LIN (Wombwell) Limited | Hospitality | 2026 |
| Linac NDT Services Ltd | Professional & scientific | 2006 |
| Linbro Demolition (UK) Limited | Construction | 1998 |
| Linbros Demolition Limited | Construction | 2014 |
| Lindley Glade Property Management Limited | Real estate | 2004 |
| Lindsay's Lettings Limited | Real estate | 2023 |
| Lineside Repairs Ltd | Wholesale & retail | 2024 |
| Lingua Genesis Limited | Education | 2008 |
| Lingwell Gate Properties Ltd | Real estate | 2025 |
| Lingwell Park Court (Maintenance) Limited | Administrative & support | 1990 |
| Linkfast UK Limited | Wholesale & retail | 2003 |
| Linley Mechanical Ltd | Construction | 2024 |
| Linux 123 Ltd | Information & communication | 2026 |