| Lukes Snap Cabin Limited | Hospitality | 2026 |
| Luma One Ltd | Wholesale & retail | 2021 |
| Luthier's Bench Limited | Manufacturing | 2014 |
| Luxe Beauty Training Ltd | Other services | 2022 |
| Lyft Hub Ltd | Manufacturing | 2025 |
| M & L Van and Waste Services Ltd | Water & waste | 2025 |
| M J Floor Coverings Ltd | Construction | 2015 |
| M Kemp Electrical & Electrical Testing Ltd | Construction | 2015 |
| M.K Engineering & Construction Services Limited | Construction | 2012 |
| MAB Quality Consultancy Ltd | Professional & scientific | 2015 |
| Main Recruit UK Ltd | Administrative & support | 2014 |
| Maison FOO | Professional & scientific | 2008 |
| Maltby's Developments Ltd | Construction | 2024 |
| Mariemc Limited | Administrative & support | 2014 |
| Mark Denton Plumbing & Heating Limited | Construction | 1999 |
| Marks MAN With a Van Removal Services Limited | Transport & logistics | 2024 |
| Marplug Technologies Limited | Manufacturing | 2013 |
| Marrymur Limited | Manufacturing | 2020 |
| Martec of Whitwell Limited | Manufacturing | 1997 |
| Maxi & Matti Properties Ltd | Real estate | 2025 |
| MBF Joinery and Building Services Ltd | Construction | 2012 |
| Mckenna Solar Ltd | Construction | 2023 |
| MCL Unitex Limited | Professional & scientific | 1997 |
| Mcneil Construction (Nottm) Ltd | Construction | 2015 |
| Mcneil Developments Ltd | Real estate | 2017 |
| Mcsd Ltd | Hospitality | 2017 |
| Mcsn Hospitality Ltd | Hospitality | 2020 |
| MD & BW Buxton Holdings Limited | Financial services | 2022 |
| MD Floorcraft Limited | Construction | 2016 |
| MDH Technical Services Limited | Construction | 2020 |
| Medical Device Support Limited | Manufacturing | 2008 |
| MEL Parker Ltd | Professional & scientific | 2018 |
| Menya XD Ramen Ltd | Hospitality | 2026 |
| Miah's Takeaway Heanor Ltd | Hospitality | 2020 |
| Michele Walsh Ltd | Information & communication | 2018 |
| Mickleover Manor Management Limited | Real estate | 1996 |
| Midland Mixers Limited | Transport & logistics | 2007 |
| Midlands Classic Cookers & Heating Ltd | Construction | 2022 |
| Midlands Dance Events Ltd | Arts & recreation | 2016 |
| Midlands Lead Works Ltd | Construction | 2014 |
| Midlands Projects Management Limited | Construction | 2016 |
| Midlands Range Cookers & Heating Ltd | Construction | 2023 |
| Millhouse Care Home Ltd | Health & social care | 2025 |
| Millpoint Showdogs Ltd | Agriculture & fishing | 2020 |
| MJ Design & Print Ltd | Manufacturing | 2022 |
| MJH Properties Solutions Ltd | Real estate | 2026 |
| MJH Welding Ltd | Manufacturing | 2019 |
| MJT Pivotal Limited | Professional & scientific | 2018 |
| MK Joinery and Kitchens Limited | Construction | 2021 |
| ML Property Services Ltd | Real estate | 2017 |
| MLC Property Relocation Ltd | Households | 2024 |
| Mocktail Beverages Europe Limited | Wholesale & retail | 2020 |
| Motor House UK (Derby) Ltd | Wholesale & retail | 2018 |
| Mpave Ltd | Construction | 2021 |
| MPB Composites Ltd | Manufacturing | 2018 |
| MR T'S Heanor Ltd | Hospitality | 2025 |
| MRS Sea's Limited | Wholesale & retail | 2014 |
| Mulberry Road Limited | Wholesale & retail | 2025 |
| Music Madness Ltd | Wholesale & retail | 2026 |
| MW Site Services Ltd | Information & communication | 2019 |
| My Home Your Home Limited | Real estate | 2019 |
| N7 Enterprise Limited | Hospitality | 2024 |
| Narrow Polythene Films Limited | Manufacturing | 2011 |
| Nature's Kiss Ltd | Manufacturing | 2025 |
| Naylor Financial Services Ltd | Financial services | 2021 |
| Nethermoor Care Killamarsh Ltd | Health & social care | 2021 |
| Neurodiverse Self Advocacy Partnership C.I.C. | Information & communication | 2019 |
| Newscard'Z Limited | Wholesale & retail | 2026 |
| NIB Garage Repairs Ltd | Wholesale & retail | 2019 |
| Nick Consultant Ltd | Professional & scientific | 2025 |
| Nigel Brown Limited | Manufacturing | 2001 |
| NIX Collective Ltd | Professional & scientific | 2022 |
| NJK Installations Ltd | Construction | 2016 |
| NL Hotwork Ltd | Professional & scientific | 2024 |
| NO Limits Community Venture Limited | Health & social care | 2013 |
| Noortek Electrical Services Ltd | Construction | 2025 |
| Nottingham Clutch and Gearbox Specialist Ltd | Wholesale & retail | 2021 |
| Nottingham Scrap Metal Limited | Wholesale & retail | 2018 |
| Nuclearpenguinsupplies Ltd | Wholesale & retail | 2026 |
| NUMBER1STAYS Ltd | Hospitality | 2024 |
| Nurture Within Nature CIC | Health & social care | 2025 |
| O'Connor Developments (Midlands) Limited | Construction | 2018 |
| Oak Tree Gardens (Heanor) Ltd | Administrative & support | 2024 |
| Oakwood Lettings Limited | Real estate | 2007 |
| Oates Consultancy Ltd | Professional & scientific | 2011 |
| Obie Specialist Lighting Ltd | Manufacturing | 2016 |
| Obsidian Events Ltd | Hospitality | 2024 |
| Odds & St'Evens Ltd | Wholesale & retail | 2022 |
| Omica Mortgages Ltd | Financial services | 2019 |
| Omica Properties Ltd | Real estate | 2022 |
| Omni Line Fencing Ltd | Construction | 2026 |
| Openmarket Goods Limited | Wholesale & retail | 2025 |
| Ophira Solutions Ltd | Information & communication | 2025 |
| Orchids Child Care Limited | Education | 2007 |
| Origin Holdings & Investments Limited | Financial services | 2023 |
| Orionbiz Ltd | Information & communication | 2016 |
| Orme Property Solutions Ltd | Real estate | 2018 |
| Orton's Haulage and Couriers Ltd | Transport & logistics | 2021 |
| OUR Home Day Centre Ltd | Public administration | 2026 |
| P & M Welding Consultants Limited | Administrative & support | 2010 |