| Lumley's Properties Ltd | Households | 2021 |
| Luna Beauty 11:11 Ltd | Other services | 2025 |
| Luna Ceramics Limited | Wholesale & retail | 2011 |
| Luna Drives Ltd | Professional & scientific | 2022 |
| Luna Whisky Limited | Wholesale & retail | 2022 |
| Lunaaestheticsandwellness Ltd | Other services | 2026 |
| Lunetta Asset Management Ltd | Financial services | 2026 |
| Lunoc Ltd | Financial services | 2025 |
| Luquintia Limited | Health & social care | 2012 |
| Lusso Park Homes Ltd | Real estate | 2019 |
| Lusso Residential Holdings Ltd | Households | 2021 |
| Luvero Accounting Limited | Professional & scientific | 2017 |
| LUX Lets (Lincoln) Ltd | Real estate | 2022 |
| Luxe HEN Limited | Wholesale & retail | 2023 |
| Luxe Majesty Ltd | Wholesale & retail | 2025 |
| Luxeora VIK Ltd | Wholesale & retail | 2025 |
| Luxepave Solutions Ltd | Construction | 2025 |
| Luxlift Ltd | Transport & logistics | 2024 |
| Luxurious KS Ltd | Wholesale & retail | 2026 |
| Luxury Bathroom Solutions (UK) Ltd | Wholesale & retail | 2014 |
| Luxury Bathroom Solutions Ltd | Wholesale & retail | 2020 |
| Luxury Labelz Limited | Wholesale & retail | 2021 |
| Luxury Nails Leytonstone Ltd | Other services | 2022 |
| Luxury Share Ltd | Real estate | 2020 |
| LVS AG Limited | Wholesale & retail | 2016 |
| LVS Racing Limited | Extraterritorial | 2013 |
| LW Renovation Group Ltd | Real estate | 2025 |
| LWK Plastering & Building Ltd | Construction | 2024 |
| Lwol Limited | Water & waste | 2013 |
| LWS Group Holdings Ltd | Information & communication | 2026 |
| Lyall Building Services Ltd | Manufacturing | 2024 |
| Lyman & Co Ltd | Real estate | 2017 |
| Lyman Marshall Surveyors Limited | Real estate | 2023 |
| LYN Will Ltd | Administrative & support | 2022 |
| Lyndsay's Contracting Services Ltd | Administrative & support | 2026 |
| Lyndsey Goddard Photography Limited | Professional & scientific | 2009 |
| Lynwith Consulting Limited | Professional & scientific | 2016 |
| Lynx AC (Holdings) Limited | Financial services | 2022 |
| Lynx AC Limited | Wholesale & retail | 1999 |
| Lynx Light & Audio Ltd | Administrative & support | 2025 |
| M & B Warehouse Limited | Wholesale & retail | 2018 |
| M & C Home Improvements Limited | Construction | 2009 |
| M & C'S Virtual Assistance Agency Limited | Administrative & support | 2024 |
| M & D Transport (Lincoln) Ltd | Transport & logistics | 2026 |
| M & G Properties Lincoln Limited | Extraterritorial | 2007 |
| M & J (Notton) Developments Ltd | Construction | 2025 |
| M & R Kirk Groundworks Limited | Construction | 2008 |
| M & S Crankshafts Limited | Manufacturing | 2011 |
| M & S Transport (Lincoln) Ltd | Transport & logistics | 2011 |
| M & T Brommell Ltd. | Construction | 2002 |
| M a Build Ltd | Construction | 2020 |
| M a M Lincoln Ltd | Construction | 2006 |
| M a Spraggins Limited | Construction | 2002 |
| M Afford Contractors Limited | Professional & scientific | 2014 |
| M and E Smithers Ltd | Arts & recreation | 2026 |
| M B Electrical Services (Lincoln) Limited | Construction | 2002 |
| M B Site Consultancy Services. Limited | Construction | 2014 |
| M C Investments Lincoln Limited | Real estate | 2018 |
| M C S (Lincoln) Limited | Construction | 2002 |
| M Dyer Transport Ltd | Transport & logistics | 2024 |
| M E C Recycling Limited | Water & waste | 2004 |
| M George Limited | Health & social care | 2009 |
| M J Medon Ltd | Wholesale & retail | 2022 |
| M J Spencer and Sons (Nettleham) Limited | Construction | 1995 |
| M K & Sons Properties Ltd | Real estate | 2018 |
| M K Perrin & SON Transport Ltd | Transport & logistics | 2022 |
| M P Holdings Lincoln Limited | Financial services | 2023 |
| M Pope Building Limited | Construction | 2016 |
| M Simenacz Ltd | Health & social care | 2017 |
| M T M Property Limited | Other services | 2003 |
| M T W Construction Limited | Construction | 2003 |
| M W In-Phase Safety Ltd | Professional & scientific | 2017 |
| M&A Hamilton Consultancy Ltd | Water & waste | 2023 |
| M&C Household Services Ltd | Other services | 2021 |
| M&K Rentals Limited | Real estate | 2026 |
| M&M Contracting Services Ltd | Construction | 2020 |
| M&M EUC Ltd | Administrative & support | 2018 |
| M&M Fit Lincoln (Centre) Limited | Health & social care | 2022 |
| M&M Foods (East Midlands) Ltd | Hospitality | 2012 |
| M&M's Cafebistro Limited | Hospitality | 2023 |
| M&P Construction & Civils Ltd | Construction | 2023 |
| M&S Cabs Ltd | Transport & logistics | 2026 |
| M. Gladwin Electrical Contractors Limited | Construction | 2002 |
| M. Mcdougall Properties Limited | Real estate | 2021 |
| M.A.W Chef Services Ltd | Hospitality | 2021 |
| M.D.B Groundworks Ltd | Construction | 2022 |
| M.F. Recovery Ltd | Wholesale & retail | 2024 |
| M.H. Design Limited | Professional & scientific | 1996 |
| M.N. Lamyman Limited | Agriculture & fishing | 1987 |
| M.S.H Electrical Services Ltd | Construction | 2022 |
| M.W.F Developments Ltd | Construction | 2020 |
| M21 Transport Ltd | Transport & logistics | 2026 |
| M3 Construction and Civils Ltd | Construction | 2022 |
| M9 HDD Ltd | Construction | 2016 |
| MA Development & Homes Ltd | Construction | 2015 |
| MA4 Ltd | Wholesale & retail | 2025 |
| Mableford Limited | Construction | 2018 |
| MAC G Aviation Limited | Professional & scientific | 2023 |
| MAC Genius Limited | Information & communication | 2007 |
| MAC Paving Ltd | Construction | 2015 |