| Mccourt Holdings (Yorkshire) Limited | Hospitality | 2018 |
| Mcgregor Lang Limited | Professional & scientific | 2000 |
| Mcharvest Ventures Limited | Arts & recreation | 2022 |
| Medical Education and Development Services Limited | Professional & scientific | 2016 |
| Mediterranean Barbers Ripon Ltd | Other services | 2024 |
| Meetingsinn Limited | Other services | 2014 |
| Melmerby Training Services Ltd | Administrative & support | 2012 |
| Metcalfe Fencing Contractors Limited | Construction | 2018 |
| Metz Properties Ltd | Real estate | 2000 |
| MF & C Consultants Ltd | Professional & scientific | 2021 |
| MFJ Land Management Ltd | Agriculture & fishing | 2019 |
| MH Engineers Ltd | Professional & scientific | 2026 |
| MHS Consulting Ltd | Information & communication | 2020 |
| Michael's Deliver Ltd | Transport & logistics | 2025 |
| Middle Farm (HG3) Limited | Agriculture & fishing | 2019 |
| Middleton Agriculture | Financial services | 2025 |
| Midland Gratings (Northern) Limited | Manufacturing | 1982 |
| Milestone Project Consulting Limited | Professional & scientific | 2024 |
| Mill House Management (Ripon) Limited | Households | 1996 |
| Minster ROW (Ripon) Management Limited | Households | 2019 |
| Miranda Rennie Ltd | Professional & scientific | 2023 |
| Mires Investments Ltd | Real estate | 2017 |
| Mitchell Wood Ltd | Professional & scientific | 2023 |
| MJ Box Properties Limited | Real estate | 2025 |
| MKD Payment and Utility Solutions Limited | Other services | 2026 |
| ML Professional Eyecare Ltd | Health & social care | 2021 |
| MLM (UK) Limited | Construction | 2008 |
| Monkey Mountaineering Ltd | Arts & recreation | 2017 |
| Moreland HG Ltd | Real estate | 1991 |
| Morgan's Estates Limited | Other services | 2023 |
| Morkulla Furnishings Ltd | Manufacturing | 2010 |
| Moss Green Limited | Construction | 2024 |
| Mowbray Consulting Limited | Information & communication | 2008 |
| Mowbray Court (Northallerton) Management Company Limited | Households | 2006 |
| Mowbray Design Architects Ltd | Professional & scientific | 2018 |
| Mrkmrfip Limited | Information & communication | 2016 |
| Mumtaz Consultancy Ltd | Information & communication | 2012 |
| Muskox Properties Limited | Construction | 2020 |
| Musterfield Farms Limited | Extraterritorial | 1997 |
| MW ENG Services Ltd | Professional & scientific | 2022 |
| MW Repairs Limited | Wholesale & retail | 2024 |
| MX Direct Ltd | Wholesale & retail | 2021 |
| My Amazing Kitchen Ltd | Construction | 2023 |
| N C Wilson Limited | Construction | 1995 |
| N Cansfield Limited | Construction | 2023 |
| N Parilli Limited | Professional & scientific | 2012 |
| N W & M Vasey & SON Ltd | Agriculture & fishing | 2009 |
| N&N Pallister Ltd | Manufacturing | 2015 |
| N.I.C. Cleaning Services Limited | Administrative & support | 2009 |
| Nandakasoft Limited | Information & communication | 2025 |
| Nathan Grassam Gents Hairdressers Limited | Other services | 2006 |
| Neetip Logistics Limited | Wholesale & retail | 2025 |
| Neevus Property LLP | | 2026 |
| Neil Green Services Limited | Construction | 2013 |
| Netcullis Limited | Information & communication | 2011 |
| Network Medical Products Limited | Manufacturing | 1996 |
| Newba Ltd | Information & communication | 2020 |
| Newby Gravel Limited | Mining & quarrying | 2012 |
| Newby Hall Cricket Club Limited | Arts & recreation | 2026 |
| Newby Hall Estate Company Limited | Energy | 2010 |
| Newby Hall Hydro Limited | Energy | 2011 |
| Nexgov Advisory Ltd | Professional & scientific | 2026 |
| Nextgen Electronics U.K. Ltd | Wholesale & retail | 2024 |
| Nexus Allied Ltd | Professional & scientific | 2013 |
| Nexus Dental Laboratory Ltd | Manufacturing | 2015 |
| Nicholas Powell Automotive Ltd | Wholesale & retail | 2019 |
| Nick Fryer Landscapes Ltd | Professional & scientific | 2025 |
| Nidd Valley Consulting Ltd | Professional & scientific | 2023 |
| Nidderdale Holidays Limited | Hospitality | 2024 |
| Nidderdale Quality Developments Limited | Real estate | 1992 |
| Night Vision Creative Ltd | Information & communication | 2023 |
| Nmbers Holdings Ltd | Information & communication | 2024 |
| Norman Chapman & SON Limited | Construction | 2007 |
| Norseman Thermos Ltd | Wholesale & retail | 2023 |
| North Deighton Sporting Syndicate Limited | Other services | 2024 |
| North Parade Prosthetics Ltd | Health & social care | 2009 |
| North Stainley Farms Limited | Agriculture & fishing | 1997 |
| North Tanfield Farm Limited | Agriculture & fishing | 2024 |
| North Yorkshire Languages Ltd | Education | 2023 |
| North Yorkshire Road Events Ltd | Health & social care | 2025 |
| North Yorkshire Sash Windows (Harrogate) Ltd | Construction | 2026 |
| Northcote Lodge Management Company Limited | Households | 1989 |
| Northern Agricultural Merchant Ltd | Agriculture & fishing | 2017 |
| Northern Air Tightness Testing Services Ltd | Professional & scientific | 2014 |
| Northern Profits Ltd | Wholesale & retail | 2025 |
| Northern Signs Ltd | Professional & scientific | 2026 |
| Norton & Roxburgh Limited | Administrative & support | 1967 |
| Noviniti DEV Co 10 Ltd | Construction | 2022 |
| Noviniti DEV Co 11 Ltd | Construction | 2022 |
| Noviniti DEV Co 12 Ltd | Construction | 2022 |
| Noviniti DEV Co 13 Ltd | Construction | 2022 |
| Noviniti DEV Co 14 Ltd | Construction | 2022 |
| Noviniti DEV Co 15 Ltd | Construction | 2022 |
| Noviniti DEV Co 16 Ltd | Construction | 2024 |
| Noviniti DEV Co 17 Ltd | Construction | 2024 |
| Noviniti DEV Co 18 Ltd | Construction | 2024 |
| Noviniti DEV Co 19 Ltd | Construction | 2026 |
| Noviniti DEV Co 2 Limited | Construction | 2018 |
| Noviniti DEV Co 20 Ltd | Construction | 2026 |
| Noviniti DEV Co 21 Ltd | Construction | 2026 |