| Lakes and Dales Countryside and Landscaping Services Ltd | Agriculture & fishing | 2023 |
| Lakes and Rivers Environmental Services Ltd | Water & waste | 2024 |
| Lakes Bioscience Ltd | Manufacturing | 2019 |
| Lakes Commercial Property Investments Limited | Real estate | 2026 |
| Lakes Construction Limited | Construction | 2024 |
| Lakes Creative Limited | Information & communication | 2011 |
| Lakes Easy Hire Limited | Administrative & support | 2026 |
| Lakes Gliding Club Ltd | Arts & recreation | 2013 |
| Lakes Heating Solutions Ltd | Construction | 2023 |
| Lakes Joinery Co Ltd | Construction | 2026 |
| Lakes LVS Ltd | Wholesale & retail | 2026 |
| Lakes PR Limited | Professional & scientific | 2011 |
| Lakes Property Investments Limited | Real estate | 2021 |
| Lakes Tanning 1982 Limited | Other services | 2025 |
| Lancashire Teaching Agency Limited | Extraterritorial | 2015 |
| Lancaster Teaching Agency Limited | Administrative & support | 2015 |
| Land and Sea Resources Limited | Administrative & support | 2010 |
| Land Drilling NVQ Ltd | Education | 2018 |
| Landrush Limited | Hospitality | 2019 |
| Larimar 1729 Ltd | Wholesale & retail | 2025 |
| Laura Jane (Cumbria) Limited | Other services | 2005 |
| LB Electrical Cumbria Ltd | Construction | 2023 |
| LDF Properties Limited | Real estate | 2016 |
| Lean SIX Sigma Services Limited | Professional & scientific | 2016 |
| Leece Homes Limited | Construction | 2013 |
| Leven Valley Electrics Limited | Construction | 2003 |
| Leven Valley Outdoors Ltd | Construction | 2019 |
| LHK Quarry Services Limited | Mining & quarrying | 2015 |
| Lighthouse Financial Planning Ltd | Financial services | 2017 |
| Lightyear Electrics Ltd | Construction | 2024 |
| Lily FOX Property Solutions Ltd | Construction | 2020 |
| Lind Studio Limited | Professional & scientific | 2018 |
| Line OUT Limited | Financial services | 2014 |
| Lisa Paunovitch Design Limited | Professional & scientific | 2016 |
| Little Brogues Limited | Wholesale & retail | 2017 |
| LL Retail Limited | Wholesale & retail | 2019 |
| LOC Fire & Safety Ltd | Professional & scientific | 2021 |
| Locksmith Cottage Limited | Hospitality | 2023 |
| LOG Home Village UK Limited | Real estate | 2004 |
| Lonjevitee Ltd | Wholesale & retail | 2010 |
| LOW Sunbrick Farm Ltd | Hospitality | 2017 |
| Lower Gill Developments Limited | Real estate | 2013 |
| Lower Nibthwaite Anglers Limited(The) | Agriculture & fishing | 1960 |
| Lowwood Products Company Limited(The) | Energy | 1953 |
| LSG Properties Limited | Real estate | 2013 |
| Ltcart Limited | Arts & recreation | 2022 |
| Luma Thai Ltd | Wholesale & retail | 2025 |
| Lunaria Housekeeping Ltd | Administrative & support | 2021 |
| Luscombe Plant Hire Limited | Administrative & support | 2001 |
| Luscombe Properties Limited | Financial services | 2024 |
| Luxer Tech Limited | Manufacturing | 2024 |
| Lydia's Hair Studio Limited | Other services | 2018 |
| M&T Adventures Ltd | Education | 2022 |
| M&V BAM Properties Ltd | Real estate | 2024 |
| M. T. Wood & Sons Limited | Construction | 2003 |
| M.E. Saunders & Sons Limited | Transport & logistics | 2000 |
| M.Ella Properties Ltd | Real estate | 2024 |
| Macs Dance Ltd | Education | 2022 |
| Magical Bamboo Ltd | Wholesale & retail | 2018 |
| MAH Clinical Services Limited | Health & social care | 2020 |
| Maidenlands Cattery Ltd | Hospitality | 2015 |
| Maidenlands Tarn Ltd | Agriculture & fishing | 2017 |
| Manaaki Limited | Health & social care | 2024 |
| Marger Limited | Professional & scientific | 1979 |
| Margertam Ltd | Hospitality | 2023 |
| Marie Braithwaite Limited | Other services | 2002 |
| Mark Bell Electrical Limited | Construction | 2010 |
| Martin Hool Construction Ltd | Construction | 2006 |
| Marton Hall Farm Ltd. | Construction | 2003 |
| Masters Putting Southport Ltd | Arts & recreation | 2000 |
| Mater Christi Multi-Academy Trust | Education | 2021 |
| Matt Dodd Limited | Information & communication | 2017 |
| MB Building Ulverston Ltd | Construction | 2026 |
| MBR Motorsports Limited | Wholesale & retail | 2014 |
| MCC Fitting and Quarry Services Limited | Manufacturing | 2018 |
| Mcdermott Brothers (Furness) Ltd | Wholesale & retail | 2017 |
| Mcrovin Services Limited | Construction | 2012 |
| Measand Limited | Hospitality | 2014 |
| Meejacafe Limited | Professional & scientific | 2025 |
| Messrs P and TL Edmondson Limited | Agriculture & fishing | 2002 |
| Metworking Limited | Other services | 2022 |
| MF78 Venture Limited | Other services | 2025 |
| Mgderm Ltd | Professional & scientific | 2012 |
| Michael Atkinson Flooring Limited | Wholesale & retail | 2010 |
| Miixa 100 Limited | Wholesale & retail | 2023 |
| Mike Clarke Building Services Ltd | Construction | 2006 |
| Mike Jones and Sons Limited | Wholesale & retail | 2022 |
| Millerfield Holdings Limited | Financial services | 2025 |
| Millerfield Limited | Real estate | 2020 |
| Millfield, Soutergate Management Company Limited | Households | 1997 |
| MIS Sold Energy UK Ltd | Professional & scientific | 2023 |
| MKG Properties Limited | Real estate | 2018 |
| MLE Services Ltd | Public administration | 2003 |
| Mllp DEV Limited | Other services | 2025 |
| Moma's Kitchen Limited | Hospitality | 2023 |
| Moma's Outside Catering Ltd | Hospitality | 2024 |
| Monica Forsman Dental & Beauty Limited | Health & social care | 2012 |
| Morecambe Holdings Limited | Real estate | 2026 |
| Morgan Joinery Limited | Manufacturing | 2015 |
| Morgan's Professional CV Writing Services Limited | Other services | 2017 |