| Minster Industrial Properties Limited | Construction | 2002 |
| Minster Properties Limited | Construction | 2000 |
| Minster Properties Residential Limited | Real estate | 2023 |
| Minster Properties Space to Work Ltd | Real estate | 2016 |
| Mint Modular UK Ltd | Construction | 2014 |
| Mizpah 111 Ltd | Agriculture & fishing | 2026 |
| MJB Housing Ltd | Real estate | 2024 |
| Mlac Limited | Wholesale & retail | 2014 |
| Mlro Support Ltd | Professional & scientific | 2004 |
| Mobile Bar Services Limited | Hospitality | 2015 |
| Mobility and Healthcare Supplies Ltd | Wholesale & retail | 2019 |
| Modular Plantrooms Limited | Manufacturing | 2019 |
| Moise Service Ltd | Wholesale & retail | 2019 |
| Molly Malones on the Harbour Limited | Wholesale & retail | 2023 |
| Molmas Unlimited | Other services | 2023 |
| Momentum Motorcycle Training Ltd | Education | 2023 |
| Momo Products Limited | Information & communication | 2012 |
| Mondial Care Ltd | Real estate | 2014 |
| Monkey IP Limited | Administrative & support | 2013 |
| Monteiro Services Ltd | Manufacturing | 2026 |
| Montrosa Limited | Hospitality | 2024 |
| Montrose Holdings and Assets Limited | Financial services | 2023 |
| Moonlit Shore Studio Ltd | Information & communication | 2025 |
| Moor House Minerals Limited | Real estate | 2012 |
| Moorings Whitby Limited | Real estate | 2022 |
| Morley Minerals Limited | Extraterritorial | 2013 |
| Mosaic Gifts Limited | Wholesale & retail | 2020 |
| Mostyn Mere House Management Limited | Households | 2025 |
| Moulsham Inclusive Housing Limited | Construction | 2020 |
| Mount Park Legal Limited | Professional & scientific | 2026 |
| Mount Square Management Company Limited | Households | 2002 |
| Mouthful of Meat Limited | Hospitality | 2018 |
| Move-In Ready Homes Ltd | Real estate | 2025 |
| Moviebox Design Ltd | Information & communication | 2020 |
| Moviebox Premiere Ltd | Information & communication | 2017 |
| Mo’S Barber Scarbrough Ltd | Other services | 2026 |
| Mo’S Barbershop Scarborough Ltd | Other services | 2026 |
| MP Catering Services Ltd | Hospitality | 2024 |
| MPE Building Ltd | Construction | 2025 |
| MPK Solutions Ltd | Information & communication | 2018 |
| MR Property Development Ltd | Real estate | 2023 |
| MR Rice Takeaway Ltd | Hospitality | 2022 |
| MRP Business Support Limited | Professional & scientific | 2020 |
| MRS Lofthouse's Emporium Ltd | Wholesale & retail | 2025 |
| MS2 Property Group Holdings Ltd | Financial services | 2025 |
| MS2 Property Group Ltd | Real estate | 2023 |
| Msas Enterprises Limited | Financial services | 2015 |
| MSW Lettings Limited | Real estate | 2018 |
| MSW Surfacing & Groundworks Limited | Construction | 2017 |
| MT Coastal Investments Ltd | Real estate | 2025 |
| MTB Property Group Ltd | Real estate | 2025 |
| Muddy Boots Clothing Ltd | Wholesale & retail | 2026 |
| Muhammad ALI Malik Limited | Health & social care | 2017 |
| Muir LEA Cottage Ltd | Hospitality | 2022 |
| Munasinghe Ltd | Health & social care | 2016 |
| Munasinghe Properties Ltd | Real estate | 2017 |
| Munching Media Ltd | Professional & scientific | 2020 |
| Musley Holdings Ltd | Financial services | 2023 |
| Mustang Estates Ltd | Real estate | 2017 |
| Mwam Holdings Limited | Financial services | 2023 |
| Mwam Specialist Engineers Limited | Manufacturing | 2016 |
| My Builders Yorkshire Limited | Construction | 2016 |
| My Courtyard Ltd | Health & social care | 2025 |
| My Pizza Time Ltd | Hospitality | 2025 |
| Myattire Ltd | Information & communication | 2026 |
| Mybility (UK) Limited | Wholesale & retail | 2012 |
| Myshar Dance Limited | Extraterritorial | 2013 |
| Mywebtrix Ltd | Information & communication | 2024 |
| N & R Thorpe Limited | Wholesale & retail | 2014 |
| N a Retail and Wholesale Limited | Wholesale & retail | 2024 |
| N Blades Limited | Hospitality | 2018 |
| N&H Property Ltd | Real estate | 2021 |
| N.A.P.P.I. (UK) Limited | Education | 1995 |
| Nail Bar Scarborough Limited | Other services | 2026 |
| Nalgo Consulting Ltd | Information & communication | 2024 |
| Nathan's Property Development Ltd | Real estate | 2025 |
| National Car Parts Limited | Professional & scientific | 2010 |
| Natura Pets Ltd | Manufacturing | 2025 |
| Nava Sushi Ltd | Hospitality | 2023 |
| Naylor's Newsagents Limited | Real estate | 2000 |
| NB Electrical & Renewables Ltd | Manufacturing | 2017 |
| Nbny Services Ltd | Construction | 2026 |
| NDL Electrical (Scarborough) Ltd | Construction | 2003 |
| Neales Body Shop Limited | Wholesale & retail | 2016 |
| Neat Flooring Ltd | Construction | 2021 |
| Neighbourhood Hospitality Ltd | Wholesale & retail | 2025 |
| Neil Thompson Builders and Brickwork Contractors Ltd | Construction | 2023 |
| Nelson Charles Group Limited | Financial services | 2024 |
| Nelson Contract Management Ltd | Professional & scientific | 2022 |
| NEO Renovations Ltd | Construction | 2024 |
| Neonexa Group Ltd | Wholesale & retail | 2025 |
| Netnine Limited | Real estate | 2006 |
| Neuro-Inclusive Hospitality CIC | Professional & scientific | 2026 |
| Neuro-Progress Coaching Ltd | Education | 2026 |
| Nevaeh Estates Limited | Real estate | 2023 |
| New Hair Style Ltd | Other services | 2022 |
| New Wave IT Consulting Limited | Information & communication | 2018 |
| Newborough Stores Ltd | Wholesale & retail | 2025 |
| Newby Dental Practice Limited | Health & social care | 2019 |
| Newlands Park Fisheries Ltd | Hospitality | 2017 |