| Little Sunshines Pre-School Ltd | Education | 2014 |
| LJ Construction and Maintenance Ltd | Construction | 2015 |
| LJ Construction Group Limited | Construction | 2025 |
| Ljdr Holdings Ltd | Financial services | 2026 |
| Ljdr Property Ltd | Real estate | 2026 |
| LJG Asbestos Ltd | Professional & scientific | 2025 |
| LJG Trading Ltd | Wholesale & retail | 2023 |
| LJP Developments (Ilkeston) Limited | Construction | 2013 |
| Lobina Holdings Limited | Financial services | 2022 |
| Lobina Property Management Limited | Real estate | 2024 |
| Lobina Transport Services Limited | Transport & logistics | 2005 |
| Longfield Building Limited | Construction | 2014 |
| Lora Hollingworth Limited | Real estate | 2015 |
| Lots Civils Limited | Construction | 2012 |
| Lourens Ventures Ltd | Professional & scientific | 2026 |
| Love Desserts Ilkeston Limited | Hospitality | 2024 |
| Love Security Ltd | Administrative & support | 2026 |
| Loving Stuff Limited | Wholesale & retail | 2013 |
| Lucky Leisure Limited | Hospitality | 1982 |
| Lucy Lockwood Ltd | Other services | 2026 |
| Luigi Lobina Socials Limited | Professional & scientific | 2025 |
| Lukas Maintenance Ltd | Real estate | 2023 |
| Lukas Properties Ltd | Real estate | 2024 |
| Lukas-Simon Trans Ltd | Transport & logistics | 2013 |
| Lumine Partners Limited | Professional & scientific | 2017 |
| Lunar Interior Projects Ltd | Professional & scientific | 2016 |
| Luxury of Fashion Limited | Extraterritorial | 2013 |
| LW Roofing Services Ltd | Construction | 2021 |
| Lynch's Mini Mart Ltd | Other services | 2024 |
| M & a Inns Ltd | Hospitality | 2024 |
| M H Relines Limited | Construction | 2005 |
| M J Lewis Electrical Ltd | Construction | 2015 |
| M Lowman Catering Limited | Administrative & support | 2006 |
| M R Gilbert Ltd | Professional & scientific | 2020 |
| M S Builders (Nottingham) Limited | Construction | 2011 |
| M&A Bars Ltd | Hospitality | 2024 |
| M-Pac Packaging Limited | Administrative & support | 2003 |
| M. R. Oates Limited | Construction | 2003 |
| M.B. Fire Attire Ltd | Wholesale & retail | 2024 |
| M.F. Birch Limited | Administrative & support | 1984 |
| M.Leavey & Sons.Limited | Extraterritorial | 1936 |
| M.P Business Ltd | Professional & scientific | 2026 |
| M3 Cloud Limited | Real estate | 2019 |
| M8PAC Limited | Financial services | 2023 |
| Macharrison Property Limited | Construction | 2022 |
| MAD Dog Coffee Bar Ltd | Hospitality | 2025 |
| Madalin Ilie Transport Limited | Transport & logistics | 2025 |
| Made Catchy Ltd | Professional & scientific | 2023 |
| Magenta Catering Supplies Limited | Wholesale & retail | 2011 |
| Maisy Morris Hairdressing Ltd | Other services | 2026 |
| Majesticare (Evesham) Holdings Limited | Financial services | 2014 |
| Majesticare (Evesham) Limited | Health & social care | 2014 |
| Majesticare Bovingdon (Holdings) Limited | Financial services | 2021 |
| Majesticare Bovingdon Limited | Health & social care | 2021 |
| Majesticare Cavendish Limited | Health & social care | 2018 |
| Majesticare Haddenham (Holdings) Limited | Financial services | 2017 |
| Majesticare Haddenham Limited | Health & social care | 2017 |
| Majesticare Hoddesdon (CS) Limited | Financial services | 2024 |
| Majesticare Hoddesdon (EV) Limited | Financial services | 2024 |
| Majesticare Hoddesdon (Holdings) Limited | Financial services | 2024 |
| Majesticare Hoddesdon (PS) Limited | Financial services | 2024 |
| Majesticare Hoddesdon Limited | Health & social care | 2024 |
| Majesticare Holdings 1 Limited | Financial services | 2011 |
| Majesticare Holdings 6 Limited | Financial services | 2013 |
| Majesticare Ltd. | Professional & scientific | 2001 |
| Mallory Motorcycles Ltd | Wholesale & retail | 2022 |
| Maltby's Creative Mill Limited | Manufacturing | 2012 |
| Manners Management Limited | Households | 2003 |
| Manor Fish Bar (Ilkeston) Ltd | Transport & logistics | 2023 |
| Manor Foundry (Ilkeston) Limited(The) | Manufacturing | 1955 |
| Manor Horizons Limited | Financial services | 2014 |
| Manor House Maintenance Limited | Construction | 2019 |
| Manor House Property Ltd | Real estate | 2016 |
| Manor Kebab Ilkeston Ltd | Wholesale & retail | 2025 |
| Manor Property Ilkeston Ltd | Real estate | 2021 |
| Manor Public Houses Ltd | Hospitality | 2018 |
| Manor Scaffolding (Ilkeston) Ltd | Construction | 2019 |
| Mapledale Limited | Manufacturing | 1998 |
| Mapperley Glamping Ltd | Hospitality | 2020 |
| Marathon Electrical Ltd | Construction | 2024 |
| Marble International Ltd | Wholesale & retail | 2019 |
| Marigold Property Group Ltd | Real estate | 2025 |
| Mark Berridge Transport Ltd | Transport & logistics | 2023 |
| Mark Lambert Limited | Construction | 2005 |
| Market Pubs Ltd | Hospitality | 2023 |
| Markoni Services Ltd | Construction | 2011 |
| Marlow's Properties Ltd | Real estate | 2025 |
| Marrabell Ltd | Wholesale & retail | 2020 |
| Marriott Optical Services UK Ltd | Information & communication | 2017 |
| Martin Grange Ltd | Real estate | 2021 |
| Martin Ogden High Class Family Butcher Ltd | Wholesale & retail | 2021 |
| Martin Pearson Investments Limited | Information & communication | 2016 |
| Martins Metals Ltd | Wholesale & retail | 2021 |
| Martyn Proctor Plumbing & Heating Ltd | Construction | 2015 |
| Marwood Leather Ltd | Wholesale & retail | 2019 |
| Mashy Ltd | Real estate | 2019 |
| Matt Wood Transport Services Ltd | Transport & logistics | 2014 |
| Mattmcguinnessandthemlc Limited | Arts & recreation | 2021 |
| MAX Waste Solutions Limited | Water & waste | 2016 |
| Maxforce Sounds Limited | Information & communication | 2026 |