| Local Crafters Collective Ltd | Professional & scientific | 2022 |
| Lockhart Limited | Real estate | 2002 |
| Lockhart Property Management Limited | Real estate | 2005 |
| Lodge Procurement Ltd | Administrative & support | 2018 |
| Lodgequest Holding Limited | Hospitality | 2011 |
| Lodgequest Operations Limited | Real estate | 2014 |
| Loftus Vascular Ltd | Other services | 2016 |
| Logistics Project Services Limited | Professional & scientific | 2022 |
| Logitechnical Consulting Ltd | Information & communication | 2011 |
| Lohita & Krishna Ltd | Health & social care | 2022 |
| Lolarose&Coco Ltd. | Manufacturing | 2013 |
| Look-Alite Limited | Extraterritorial | 2014 |
| Lord Clarke Associates Limited | Administrative & support | 2022 |
| Lord Clarke Limited | Financial services | 2006 |
| Lorna Jayne Ltd | Manufacturing | 2011 |
| Loughborough CNC Limited | Manufacturing | 1993 |
| Loving Your Work Ltd | Information & communication | 2009 |
| Lower East Property Ltd | Real estate | 2026 |
| Lowvolthub Ltd | Wholesale & retail | 2021 |
| LOX Creative Ltd | Arts & recreation | 2011 |
| Loxam Access Limited | Administrative & support | 2024 |
| LPH Concerts & Events Ltd | Other services | 2014 |
| LS2 Holdings Limited | Administrative & support | 2020 |
| LSG Business Consultancy Ltd | Professional & scientific | 2022 |
| LSH Electrical Services Ltd | Construction | 2024 |
| LT Imaging Ltd | Health & social care | 2023 |
| Lucky Eyes Limited | Wholesale & retail | 2014 |
| Luddite Engineering Ltd | Professional & scientific | 2018 |
| Luscious Greens Ltd | Agriculture & fishing | 2020 |
| Lutterworth & District Shops | Health & social care | 2017 |
| Lutterworth 5-A-SIDE Leagues Limited | Arts & recreation | 2016 |
| Lutterworth Auto Service & Repairs Ltd | Wholesale & retail | 2026 |
| Lutterworth Cycle Centre Ltd | Wholesale & retail | 2015 |
| Lutterworth Driving School Ltd | Other services | 2013 |
| Lutterworth Fire and Security Ltd | Wholesale & retail | 2025 |
| Lutterworth Football Academy Limited | Arts & recreation | 2015 |
| Lutterworth GC Holdings Limited | Arts & recreation | 2019 |
| Lutterworth GC Limited | Arts & recreation | 2019 |
| Lutterworth High School Academy Trust | Education | 2011 |
| Lutterworth Hvac Limited | Construction | 2024 |
| Lutterworth Landscapes Limited | Other services | 2001 |
| Lutterworth M.O.T. Centre Ltd | Wholesale & retail | 2007 |
| Lutterworth Masonic Association Limited | Other services | 2018 |
| Lutterworth Nail and Spa Ltd | Other services | 2025 |
| Lutterworth Natural Health Ltd | Hospitality | 2025 |
| Lutterworth Properties Limited | Real estate | 2015 |
| Lutterworth Property Management Company Limited(The) | Construction | 1959 |
| Lutterworth Shambles Limited | Hospitality | 2024 |
| Lutterworth Storage Ltd | Transport & logistics | 2025 |
| Lutterworth Trailer Hire Limited | Other services | 2012 |
| Lutterworth Volunteer Centre Limited | Other services | 2011 |
| Lynton Developments Limited | Construction | 2009 |
| M & a Persse Ltd | Hospitality | 2018 |
| M & L Services (Midlands) Limited | Construction | 2002 |
| M C Industries Limited | Manufacturing | 2014 |
| M Daunt Ltd | Health & social care | 2019 |
| M Deacon Builders Ltd | Construction | 2013 |
| M G Joinery Contracts Ltd | Manufacturing | 2010 |
| M Giovannelli Limited | Real estate | 2011 |
| M J Buckingham Ltd | Administrative & support | 2016 |
| M J Gamble Agriculture & Plant Ltd | Professional & scientific | 2026 |
| M J Gamble Mechanical Services Ltd | Wholesale & retail | 2026 |
| M J Parker GAS Services Ltd | Construction | 2017 |
| M M M Ventures Limited | Health & social care | 2015 |
| M P H International Limited | Wholesale & retail | 2006 |
| M T Engineering Solutions Ltd | Other services | 2014 |
| M T Stanton Holdings Ltd | Financial services | 2023 |
| M Williams Consulting Limited | Information & communication | 2008 |
| M&H Consultancy Ltd | Professional & scientific | 2023 |
| M&J Hair Tech Limited | Other services | 2012 |
| M. C. Reeve Engineering Ltd | Manufacturing | 2014 |
| M.I.S. Resolved Ltd | Information & communication | 2007 |
| M.J. Golding Electrical Limited | Construction | 2012 |
| M.K.L. Properties Ltd. | Hospitality | 1992 |
| MAC Templating Limited | Construction | 2014 |
| Macanom Ltd | Manufacturing | 2023 |
| Macc Kent Limited | Other services | 2024 |
| Macc UK Limited | Wholesale & retail | 1997 |
| Machin Health & Wellbeing Ltd | Health & social care | 2024 |
| Madebrand Limited | Professional & scientific | 1992 |
| MAF Fire Consultants Ltd | Professional & scientific | 2025 |
| MAF Fire Risk Ltd | Extraterritorial | 2021 |
| Magna Storage LLP | | 2020 |
| Magna Works Ltd | Construction | 2025 |
| MAH Inspections Ltd | Professional & scientific | 2020 |
| MAH Orthopaedics Ltd | Health & social care | 2022 |
| Mainland Engineering Limited | Professional & scientific | 2024 |
| Mair Land & Planning Consultants Ltd | Professional & scientific | 2017 |
| Makfry UK Ltd | Wholesale & retail | 2013 |
| Mallory Industrial Coatings Limited | Manufacturing | 1997 |
| Malo & Krumbs Ltd | Health & social care | 2016 |
| Maloygo Contracts Limited | Information & communication | 2007 |
| Maltings (Crib Street) Management Limited | Households | 1982 |
| Mandala Enterprises Limited | Arts & recreation | 2004 |
| Mango NO1 (UK) Limited | Energy | 2019 |
| Manor Farm (Leicestershire) Limited | Agriculture & fishing | 2024 |
| Manor Farm Catthorpe Campsite Limited | Hospitality | 2024 |
| Manta Risk Solutions Ltd | Administrative & support | 2025 |
| Maple Reach Limited | Administrative & support | 2026 |
| Maple Tree Financial Planning Ltd | Professional & scientific | 2024 |