| MC Building Developments Limited | Construction | 2026 |
| Mccb Electrical Engineering Ltd | Professional & scientific | 2019 |
| MCN Capital Limited | Administrative & support | 2021 |
| MD Mobile Tyres Kendal Ltd | Wholesale & retail | 2026 |
| Meadow and Moon Limited | Administrative & support | 2025 |
| Meadow View RTM Company Limited | Households | 2025 |
| Meadows Padel Ltd | Arts & recreation | 2026 |
| Mealbank Properties Limited | Real estate | 1991 |
| Meaningful Marketing Limited | Professional & scientific | 2022 |
| Meantime Information Technologies Ltd | Information & communication | 1991 |
| Mediatrain Ltd | Information & communication | 2008 |
| Memoscan Ltd | Real estate | 2023 |
| Menzi Muck Ireland Ltd | Manufacturing | 2025 |
| Menzi Muck Ltd | Manufacturing | 2025 |
| Meraki HR Solutions Ltd | Professional & scientific | 2014 |
| Meridian Geoscience Limited | Professional & scientific | 1996 |
| Meritin Management Limited | Professional & scientific | 2004 |
| Merrycon Ltd | Information & communication | 2001 |
| Metroplan Limited | Wholesale & retail | 1978 |
| MH Archtech Limited | Professional & scientific | 2026 |
| Michael Coates Limited | Arts & recreation | 2012 |
| Microdot Boutique Limited | Wholesale & retail | 2021 |
| Microdot Creative Ltd | Professional & scientific | 2018 |
| Midac Body Repairs Limited | Wholesale & retail | 2003 |
| Mighty Oak Initiative Ltd | Education | 2024 |
| Mike Barron Tiling Ltd | Construction | 2019 |
| Mike Capstick Limited | Construction | 2011 |
| Mike Harper Limited | Agriculture & fishing | 2003 |
| Miles Tarn Community Action | Professional & scientific | 2005 |
| Military Quads UK Ltd | Wholesale & retail | 2021 |
| Mill Beck New Hutton Management Company Ltd. | Households | 1998 |
| Millbeck Hydro Limited | Energy | 2014 |
| Miller Clear Architects LLP | | 2016 |
| Millholme Properties Limited | Real estate | 2023 |
| Millhouse Estates Limited | Construction | 2003 |
| Milne Moser Property Limited | Real estate | 2016 |
| Mint Homes Lettings Ltd | Real estate | 2013 |
| Mint Mill Kendal Ltd | Hospitality | 2021 |
| Mint Optical Ltd | Health & social care | 2015 |
| Mint Street 1969 Limited | Extraterritorial | 2014 |
| Mintlife Ltd | Wholesale & retail | 2024 |
| Mirefoot Holdings | Financial services | 2023 |
| Miss Marks Limited | Health & social care | 2021 |
| Mitchinsons Accountants Ltd | Professional & scientific | 2018 |
| MJ Shepherd Limited | Construction | 2014 |
| MK Evolution Solutions Ltd | Health & social care | 2026 |
| MKB Sisters Ltd | Hospitality | 2017 |
| ML France Properties Ltd | Real estate | 2024 |
| MM Cottages Limited | Real estate | 2026 |
| Moderation PUB Company Ltd | Hospitality | 2024 |
| Modern Living Housing Association | Real estate | 2009 |
| Modlabs Limited | Wholesale & retail | 2023 |
| Moffat Lettings Limited | Real estate | 2018 |
| Moheko Ltd | Extraterritorial | 2009 |
| Mommas Foods Limited | Hospitality | 2002 |
| Monk & Brown Ltd | Professional & scientific | 2025 |
| Moor Mike Ltd | Agriculture & fishing | 2024 |
| Moor Race Ltd | Agriculture & fishing | 2024 |
| Moor Steve Ltd | Agriculture & fishing | 2024 |
| Moore Wealth Limited | Financial services | 2002 |
| Morecambe Bay Physiotherapy Limited | Health & social care | 2012 |
| Moreni Rescue Dogs and T4T Transportation Ltd | Agriculture & fishing | 2021 |
| Morph Media Ltd | Information & communication | 2021 |
| Motmot Consulting Ltd | Professional & scientific | 2017 |
| Mountain Creative Limited | Arts & recreation | 2014 |
| Mountain Tops Care Farm CIC | Education | 2026 |
| MTB Accounting Services Limited | Professional & scientific | 2017 |
| Muddy Boots Adventures Ltd | Hospitality | 2022 |
| Mulard Renewables Holdings Limited | Energy | 2018 |
| Mulard Renewables Limited | Energy | 2013 |
| Mumbai Indian Ltd | Hospitality | 2024 |
| Mumbai Kendal Ltd | Hospitality | 2024 |
| Mwbh Bottling Co. Limited | Manufacturing | 1999 |
| My Gourmet Mushrooms Ltd | Wholesale & retail | 2021 |
| My Kind of Clean - South Lakes Ltd | Administrative & support | 2022 |
| Myers Interiors Limited | Administrative & support | 2017 |
| Myrtle Grove Estate Limited | Financial services | 2024 |
| N Coates and Sons Construction Limited | Construction | 2025 |
| N Coates and Sons Limited | Construction | 2014 |
| N G and T K Procter Ltd | Construction | 2003 |
| N W Mattinson Ltd | Construction | 2025 |
| N.B. Dugdale (Engineering) Limited | Construction | 1996 |
| N.Gill Roofing Services Ltd | Construction | 2022 |
| Nadj Consulting Limited | Administrative & support | 2016 |
| Nalas Bistro Limited | Hospitality | 2024 |
| Nateby Farm | Professional & scientific | 2010 |
| Natland Dairies Limited | Manufacturing | 2024 |
| Natland Sales Group Limited | Wholesale & retail | 2025 |
| Natural Beauty by Alexandra Ltd | Wholesale & retail | 2025 |
| Natural Kendal CIC | Professional & scientific | 2023 |
| Naturesgems Ltd | Professional & scientific | 2021 |
| Navigation Trails Ltd | Arts & recreation | 2024 |
| Ndnh Plastering Ltd | Construction | 2025 |
| Neil Jurd Consulting and Training Limited | Professional & scientific | 2017 |
| Neill Fisher Limited | Construction | 2006 |
| Nest Properties Holding Ltd | Financial services | 2024 |
| Nest UK Properties Ltd | Real estate | 2024 |
| NET Development Ltd | Administrative & support | 2012 |
| Netherbridge Limited | Professional & scientific | 2024 |
| Network Trade Insurance Services Limited | Financial services | 2008 |