| Moonlight Shopper Limited | Wholesale & retail | 2022 |
| Moonlit Meadow Retreat Ltd | Hospitality | 2025 |
| Mooretech Engineering (Lincoln) Ltd | Manufacturing | 2014 |
| Moorethanclean Ltd | Administrative & support | 2026 |
| Moorland (LN) Ltd | Hospitality | 2017 |
| Moorland Way Holdings Limited | Real estate | 2018 |
| Moravek International Limited | Wholesale & retail | 2005 |
| More Development UK Ltd | Construction | 2014 |
| More Rural Consultancy Limited | Agriculture & fishing | 2007 |
| More Than Gardens Ltd | Other services | 2013 |
| Morecrest Limited | Households | 1988 |
| Morella Media Ltd | Information & communication | 2026 |
| Morgan Hospitality Ltd | Hospitality | 2020 |
| Morris (Lincolnshire) Limited | Transport & logistics | 2023 |
| Morris Carpets & Flooring Ltd | Construction | 2003 |
| Morris Cast Signs Ltd | Manufacturing | 2019 |
| Morris EYE Care Ltd | Health & social care | 2013 |
| Morris Helicopter Engineering Limited | Professional & scientific | 2021 |
| Morris Retail Limited | Manufacturing | 2005 |
| Morris Trading Limited | Manufacturing | 2003 |
| Mortar Stone Limited | Construction | 2024 |
| Mortgage Minders (Lincoln) Limited | Financial services | 2008 |
| Morv Estates 2 Limited | Real estate | 2025 |
| Morv Estates Ltd | Financial services | 2017 |
| Moseley Properties Ltd | Real estate | 2026 |
| Mosongo Limited | Transport & logistics | 2023 |
| Mosquito Brewery LLP | | 2013 |
| Moss Europe Limited | Wholesale & retail | 2000 |
| Moss Site Services Limited | Other services | 2013 |
| Mostafa Curry of Lincolns Ltd | Hospitality | 2023 |
| Motivation to Change Therapy Ltd | Health & social care | 2025 |
| Motor Care & Detailing Ltd | Other services | 2020 |
| Motor ME Lincoln Ltd | Wholesale & retail | 2025 |
| Motor Wise Vehicles Ltd | Wholesale & retail | 2014 |
| Motorfox Ltd | Wholesale & retail | 2019 |
| Motslots.Co.Uk Ltd | Wholesale & retail | 2024 |
| Mottram Farms Limited | Agriculture & fishing | 2013 |
| Mould Mission Ltd | Health & social care | 2025 |
| Moulds Fencing (Torksey) Limited | Construction | 2006 |
| Moulds Fencing Limited | Construction | 2026 |
| Moulton Projects Ltd | Construction | 2024 |
| Mount & Minster LLP | | 2015 |
| Mount & Minster Real Estate Ltd | Real estate | 2025 |
| Mountain Flooring Ltd | Construction | 2024 |
| Moustache Deliveries Ltd | Transport & logistics | 2024 |
| Movara Health Limited | Health & social care | 2023 |
| Move, Listen and Learn Limited | Education | 2018 |
| Mower Magic Limited | Wholesale & retail | 2003 |
| Moyes Property Ltd | Real estate | 2023 |
| MP Collective Ltd | Wholesale & retail | 2026 |
| MPD78 Consultants Limited | Professional & scientific | 2014 |
| MPS Investments (Lincoln) Limited | Professional & scientific | 2020 |
| MPT Plant & Transport Limited | Construction | 2021 |
| MR & MRS L Durasamy & Sons Limited | Real estate | 1997 |
| MR a D Toms Ltd | Health & social care | 2011 |
| MR Benjamin's Barbershop Limited | Other services | 2019 |
| MR Brown's Barbershop Ltd | Other services | 2016 |
| MR Dybalo Limited | Real estate | 2021 |
| MR M Sood Ltd | Health & social care | 2009 |
| MR Sparkle Investments Limited | Wholesale & retail | 2025 |
| MR T'S Shirts Ltd | Wholesale & retail | 2016 |
| MR. MOP Ltd | Administrative & support | 2025 |
| Mr.T Glazing & Locksmiths Ltd | Construction | 2025 |
| Mrdeck Ltd | Construction | 2022 |
| MRF Lincoln Ltd | Real estate | 2020 |
| MRL Consultants Limited | Professional & scientific | 2001 |
| Mrozek Transport Ltd | Transport & logistics | 2026 |
| MRP Pipelines Limited | Construction | 2025 |
| Mrwalkerfrcophth Ltd | Health & social care | 2021 |
| MS Cleaning Services Ltd | Administrative & support | 2005 |
| MSB Property Group Ltd | Professional & scientific | 2024 |
| Msfd Plumbing Limited | Construction | 2019 |
| MSK Orthopaedics Ltd | Health & social care | 2014 |
| MSK Subsidiaries Ltd | Real estate | 2019 |
| MSL Developments (Lincoln) Limited | Construction | 2020 |
| MSM Build (Conservation & Restoration Builders) Limited | Construction | 2025 |
| MSP Automotive Holdings Ltd | Real estate | 2024 |
| MSP Automotive Ltd | Wholesale & retail | 2010 |
| MSP Case Management Holdings Limited | Real estate | 2022 |
| MSP Training Services Ltd | Education | 2019 |
| Msph Property Ltd | Real estate | 2025 |
| MSS Consultancy Ltd | Professional & scientific | 2019 |
| MST Property Investments Ltd | Real estate | 2025 |
| MT Maintenance Services Limited | Construction | 2020 |
| MTS Suction Systems UK Ltd | Wholesale & retail | 2014 |
| Mubilee Ltd | Real estate | 2025 |
| MUC My Used Cars Ltd | Professional & scientific | 2026 |
| Mudita Gifts Ltd | Wholesale & retail | 2022 |
| Mudrut Adventures Limited | Extraterritorial | 2012 |
| Mugire Ltd | Wholesale & retail | 2020 |
| Muhammad Naeem Ltd | Wholesale & retail | 2025 |
| Mujahid Properties Ltd | Real estate | 2022 |
| Mulberry House (Lincoln) Limited | Real estate | 2007 |
| Mulberry Landscape and Horticulture Ltd | Administrative & support | 2020 |
| Multi Source Energy Ltd | Other services | 2021 |
| Multi Sport Pro Limited | Education | 2017 |
| Multifacets Ltd | Health & social care | 2009 |
| Mumendears Ltd | Wholesale & retail | 2025 |
| Mumford Land Limited | Real estate | 2024 |
| Munci Limited | Information & communication | 2020 |