| Locked in Promotions Ltd | Arts & recreation | 2022 |
| Locked Properties Limited | Real estate | 2023 |
| Lockholt Solutions Ltd | Information & communication | 2017 |
| Locksmith Leeds Mobilels Ltd | Administrative & support | 2018 |
| Lockwood Roofing Ltd | Construction | 2019 |
| Lockwoods Technical Services (Liverpool) Limited | Construction | 1971 |
| Loco PVT Ltd | Professional & scientific | 2026 |
| Locsofleeds Limited | Professional & scientific | 2025 |
| Locum Force Ltd | Health & social care | 2019 |
| Locum GPS Agency Limited | Health & social care | 2017 |
| Locum PA Ltd | Health & social care | 2013 |
| Locums.Prn Ltd | Professional & scientific | 2024 |
| Locus Action Research | Arts & recreation | 2008 |
| Locus Financial & HR Ltd | Other services | 2020 |
| Lodestar Engineers Limited | Manufacturing | 1993 |
| Lodestone Holdings Leeds Ltd | Professional & scientific | 2026 |
| Lodestone Holdings Limited | Financial services | 2020 |
| Lodestone Living Developments Limited | Construction | 2024 |
| Lodestone Living Limited | Real estate | 2024 |
| Lodestone Projects (Leeds) Limited | Construction | 2020 |
| Lodestone Projects Limited | Construction | 2011 |
| Lodge Builders Limited | Construction | 2017 |
| Lodge Leeds Ltd | Hospitality | 2021 |
| Loft (Rawdon) Limited | Hospitality | 2026 |
| Loftfix Ltd | Construction | 2025 |
| Lofthouse Roofing Limited | Other services | 2012 |
| Loftus Roofing Ltd | Construction | 2025 |
| Loftware UK Limited | Professional & scientific | 2020 |
| Lofty Project Services Ltd | Professional & scientific | 2022 |
| Logan Luxury and Investment Properties Ltd | Real estate | 2013 |
| Loganberry Homes Ltd | Real estate | 2024 |
| Logbook Money Limited | Financial services | 2011 |
| Logic Architecture Limited | Professional & scientific | 2014 |
| Logic Entertainment (Leeds) Ltd | Arts & recreation | 2025 |
| Logic Healthcare Ltd | Wholesale & retail | 2014 |
| Logic Leasing Ltd | Wholesale & retail | 2020 |
| Logic Motor Group Ltd | Wholesale & retail | 2020 |
| Logic Supplies Limited | Information & communication | 2016 |
| Logical Contracting Limited | Construction | 2014 |
| Logical Facilities Management Ltd | Households | 2025 |
| Logical Minds Limited | Information & communication | 2004 |
| Logical Personnel Solutions Limited | Administrative & support | 2006 |
| Logical PS Group Limited | Professional & scientific | 2014 |
| Logical Resources Fmcg Limited | Administrative & support | 2015 |
| Logical Resources International Limited | Administrative & support | 2023 |
| Logical Resources Sales Recruitment Limited | Administrative & support | 2014 |
| Logihub Ltd | Transport & logistics | 2026 |
| Logiscore Ltd | Information & communication | 2026 |
| Logistic Solutions Global Limited | Other services | 2024 |
| Logistics Consultant UK Freight Ltd | Transport & logistics | 2020 |
| Logistics Delivery by Road Limited | Transport & logistics | 2024 |
| Logistratix Limited | Information & communication | 2025 |
| Logix Communications Ltd | Information & communication | 2019 |
| Logps Property Limited | Real estate | 2019 |
| LOGS4FIRES Ltd | Wholesale & retail | 2025 |
| Loico Ltd | Wholesale & retail | 2019 |
| Loida Consulting Limited | Professional & scientific | 2025 |
| Loidis Capital Ltd | Financial services | 2022 |
| Loidis Care Services Limited | Health & social care | 2018 |
| Loisconsultinghcd Limited | Hospitality | 2025 |
| LOJ Trading Limited | Arts & recreation | 2026 |
| LOK Consulting Services Ltd | Financial services | 2023 |
| Loklee Limited | Transport & logistics | 2023 |
| Loktec Limited | Administrative & support | 2003 |
| Lolana Ltd | Administrative & support | 2025 |
| Lolavista Limited | Health & social care | 2014 |
| Lolies Limited | Health & social care | 2018 |
| Lollop Media House Limited | Arts & recreation | 2016 |
| Lomas Automation Ltd | Professional & scientific | 2021 |
| Lomax Contractors Ltd | Construction | 2019 |
| Lomax Enterprises Limited | Wholesale & retail | 2013 |
| Lombite's Compassionate Health Care Limited | Health & social care | 2024 |
| Lonbank Realty Limited | Real estate | 2018 |
| Londesborough Holdings Ltd | Real estate | 2011 |
| London & Allerthorpe Limited | Administrative & support | 2013 |
| London & Leeds Business Centres Limited | Real estate | 1999 |
| London & Warwick Limited | Information & communication | 2004 |
| London Adviser Ltd | Professional & scientific | 2026 |
| London and Pocklington LLP | | 2008 |
| London Axion Ltd | Information & communication | 2026 |
| London Barber 4 Ltd | Other services | 2024 |
| London Building Control Services Limited | Construction | 2017 |
| London Court Limited | Financial services | 1989 |
| London Environmental (Asbestos) LLP | | 2018 |
| London Equity Release Limited | Financial services | 2016 |
| London EYE Health Limited | Health & social care | 2025 |
| London Fashion Festival Limited | Professional & scientific | 2015 |
| London Green Roof Company Limited | Construction | 2007 |
| London Health Star Ltd | Manufacturing | 2023 |
| London Property Services Limited | Real estate | 2003 |
| London Publishing Ltd | Education | 2019 |
| London Restaurant Group Limited | Financial services | 2024 |
| London Spray Painters Limited | Construction | 2024 |
| London Street Kitchen Ltd | Hospitality | 2022 |
| London Wheels Leeds Ltd | Hospitality | 2025 |
| Londrette Ltd | Administrative & support | 2016 |
| Lone Motors Ltd | Wholesale & retail | 2025 |
| Lone Wolf Fitness Limited | Education | 2024 |
| Lonely Warrior Ltd | Wholesale & retail | 2023 |
| Lonestar Music Ltd | Wholesale & retail | 2011 |