| Lambretta Holdings Limited | Financial services | 2007 |
| Landmax Minerals Ltd | Professional & scientific | 2023 |
| Lara Bella's Pizza Ltd | Hospitality | 2019 |
| Lara Bella's Pizzaria Ltd | Hospitality | 2013 |
| Last Stand Ltd | Wholesale & retail | 2026 |
| Latchgate Limited | Other services | 2010 |
| Latchgate Property Limited | Professional & scientific | 2013 |
| Latitude Surveys Ltd | Professional & scientific | 2009 |
| Latkyns Limited | Households | 2023 |
| Latus Property Company Limited | Real estate | 2016 |
| Learner Driving Academy Ltd | Other services | 2016 |
| Leeds Hindu Forum Community Interest Company | Education | 2025 |
| Leila Ives Mortgage and Protection Services Ltd | Financial services | 2020 |
| LEO Francis Photography Limited | Professional & scientific | 2017 |
| Lernaw Consulting Limited | Professional & scientific | 2024 |
| Letting Zone UK Ltd | Real estate | 2006 |
| Levor Consulting Limited | Professional & scientific | 2023 |
| Lifestyle Living Property Ltd | Real estate | 2023 |
| Lifestyle Property Investments Ltd | Real estate | 2024 |
| Liftroller UK Ltd | Wholesale & retail | 2024 |
| Lighthouse Educational Psychology Ltd | Health & social care | 2021 |
| Lilo Music Ltd | Information & communication | 2020 |
| Lisa Mcmurtry Coaching Limited | Administrative & support | 2020 |
| Little Big Smith Ltd | Manufacturing | 2017 |
| Liv’S Lounge Limited | Hospitality | 2024 |
| Lloyd Patchett Farms Limited | Agriculture & fishing | 1989 |
| Localpad Ltd | Hospitality | 2013 |
| Lockwood Spares Limited | Wholesale & retail | 2007 |
| London & Liverpool Limited | Real estate | 2012 |
| Lovel (Beverley) Limited | Real estate | 2002 |
| Lovel (East Midlands) Limited | Real estate | 2012 |
| Lovel Capital Projects Limited | Real estate | 2012 |
| Lovel Developments (Yorkshire) Limited | Construction | 2004 |
| Lovel Developments Limited | Real estate | 2001 |
| Lovel Property Holdings Ltd | Professional & scientific | 2013 |
| LP Building and Construction Ltd | Construction | 2026 |
| LPM 2011 Limited | Financial services | 2011 |
| LPM Group Holdings Limited | Professional & scientific | 2014 |
| LPM Holdings Limited | Financial services | 2004 |
| LPM Investments (2002) Limited | Professional & scientific | 2002 |
| LPM Investments (2003) Limited | Professional & scientific | 2003 |
| LPM Investments (2004) Limited | Extraterritorial | 2004 |
| LRH Services Ltd | Construction | 2024 |
| Lucas Lochlan Consultancy Ltd | Professional & scientific | 2026 |
| Lucas Productions Limited | Information & communication | 2024 |
| Lucky Duck(Welton) Limited | Hospitality | 2020 |
| Luke's Bakery Ltd | Hospitality | 2021 |
| Lyonsadair Ltd | Education | 2022 |
| M & D Hire Ltd | Administrative & support | 2024 |
| M & H Contour Limited | Administrative & support | 2019 |
| M & H Transport (Hull) Limited | Transport & logistics | 1984 |
| M & J Installations Limited | Construction | 2016 |
| M Chapman School of Motoring Ltd | Education | 2011 |
| M L G Advertising Ltd | Information & communication | 2012 |
| M Mell Joinery Ltd | Manufacturing | 2025 |
| M Stellings Property Developments Ltd | Real estate | 2021 |
| Macpad Ltd | Real estate | 2018 |
| Makin Property Management Limited | Real estate | 2020 |
| Malar Retails Ltd | Wholesale & retail | 2021 |
| Malverncrest Limited | Administrative & support | 1996 |
| Market Weighton Development Company Limited | Real estate | 2011 |
| Marsden Holdingco Ltd | Professional & scientific | 2026 |
| Marsh Property Investments UK Limited | Real estate | 2017 |
| Marshland Trangistics Ltd | Transport & logistics | 2014 |
| Martin Family Property Limited | Real estate | 2023 |
| Maruthavel Retails Limited | Wholesale & retail | 2023 |
| Maruthavel UK Ltd | Wholesale & retail | 2016 |
| Matthew Cook Limited | Construction | 2003 |
| Mattsbiofuels Ltd | Wholesale & retail | 2026 |
| Maughan Construction Limited | Construction | 2022 |
| Mayasat Limited | Health & social care | 2019 |
| MB 1962 Ltd | Extraterritorial | 2012 |
| Mchen Developments Limited | Construction | 2025 |
| MCM Engineering Services Limited | Information & communication | 2011 |
| Mcqueen & Pearson Ltd | Agriculture & fishing | 2025 |
| Mcrl Law Limited | Professional & scientific | 2021 |
| MD Catering Ltd | Hospitality | 2015 |
| MD Endomed Ltd | Health & social care | 2022 |
| MD Gardening Services Limited | Administrative & support | 2012 |
| Mechanical Modular Services Ltd | Construction | 2025 |
| Medici Takeaway Limited | Hospitality | 1998 |
| Meena Balaji Limited | Health & social care | 2014 |
| Mendelita Ltd | Agriculture & fishing | 2015 |
| Merevale Luxury Resorts Limited | Hospitality | 2024 |
| Middwind Limited | Manufacturing | 2026 |
| Mikes Fresh Fish Limited | Wholesale & retail | 2017 |
| Millias Close Court RTM Company Limited | Households | 2024 |
| Mindfluential Solutions Limited | Education | 2021 |
| Minecraft Properties Limited | Health & social care | 2021 |
| Mires Beck Nursery | Agriculture & fishing | 1994 |
| Missy & Co Cleaning Ltd | Administrative & support | 2023 |
| Mitchell Oliver Site Services Limited | Construction | 2014 |
| MJD GAS Services Ltd | Manufacturing | 2015 |
| MJJ Piping Ltd | Construction | 2015 |
| Molescroft Estates Limited | Real estate | 2005 |
| Mollymae Direct Limited | Wholesale & retail | 2020 |
| Monksbridge Developments LLP | | 2008 |
| Monksbridge Ltd | Other services | 2023 |
| Moody BEE Marketing Ltd | Professional & scientific | 2020 |
| Moordale Foods Limited | Wholesale & retail | 2015 |