| LOW Stakesby House Residents Association Limited | Households | 1973 |
| Lower URE Conservation Trust | Arts & recreation | 1997 |
| LPS (Richmond) | Hospitality | 1994 |
| LPS (Richmond) Holdings | Real estate | 1979 |
| Lunn 21 Limited | Professional & scientific | 1999 |
| M & F Property (2025) Limited | Real estate | 2025 |
| M & JC Webster & Sons Ltd | Agriculture & fishing | 2007 |
| M & M Wood Ltd | Agriculture & fishing | 2002 |
| M a Graves Joinery Ltd | Manufacturing | 2003 |
| M J Verden Limited | Construction | 2003 |
| M N B Joinery Limited | Construction | 2005 |
| M. Muscroft (Decorators) Ltd | Administrative & support | 2003 |
| M. Nockels Limited | Wholesale & retail | 2002 |
| M.H. Management Company Limited | Construction | 1987 |
| M.J. Wilson Limited | Agriculture & fishing | 2003 |
| Maismb Ltd | Wholesale & retail | 2026 |
| Malcolm Tempest Limited | Professional & scientific | 1970 |
| Malton H& F Limited | Wholesale & retail | 2002 |
| Manor Barn Furniture Limited | Manufacturing | 2001 |
| Manor House Acquisitions Limited | Real estate | 2016 |
| Manor House Commercial Acquisitions Limited | Real estate | 2016 |
| Marc Kerr Limited | Arts & recreation | 2007 |
| Marina K Limited | Information & communication | 1999 |
| Mark Stephenson & Co Limited | Real estate | 2003 |
| Marketmain Limited | Wholesale & retail | 1989 |
| Marketry Limited | Extraterritorial | 2000 |
| Markington Developments Limited | Construction | 1986 |
| Marla Gold Technical Services Ltd | Construction | 2026 |
| Marton Services Limited | Other services | 2007 |
| Mastermans Limited | Professional & scientific | 1992 |
| Mauleverer House Management Company Limited | Households | 1987 |
| Mayroyd Limited | Agriculture & fishing | 2002 |
| Mccain Finance (GB) Limited | Financial services | 1995 |
| MCG (Scarborough) Limited | Real estate | 2003 |
| Mclellan and Bence Consultants Limited | Professional & scientific | 2006 |
| MD Consulting [Malton] Limited | Professional & scientific | 2002 |
| MED Design Services Limited | Professional & scientific | 2001 |
| Medacy Ltd | Administrative & support | 2003 |
| Medalmade Khaleejiya Trading Ltd | Wholesale & retail | 2026 |
| Medlock Method Limited | Information & communication | 2005 |
| Mednova Group Ltd | Manufacturing | 2026 |
| Mentionfield Limited | Professional & scientific | 1983 |
| Metcalfe Farms (Haulage) Limited | Transport & logistics | 2006 |
| Metcalfe Models and Toys Ltd | Manufacturing | 2002 |
| Middlesex Partition Slab & Concrete Company Limited (the) | Construction | 1934 |
| Middleton Lodge Events Limited | Hospitality | 2006 |
| Milano Computing Ltd | Professional & scientific | 2003 |
| Milbank Investments Ltd | Financial services | 2014 |
| Minster View Management Company (York) Ltd | Households | 1995 |
| Miss J L Moran & MR J R Carr Ltd | Agriculture & fishing | 2024 |
| Mister C'S Limited | Hospitality | 2003 |
| Mitchell Roofing Limited | Construction | 2007 |
| MK Services (York) Limited | Information & communication | 2004 |
| Mohamed Hamdy for Trading and General Contracting Ltd | Wholesale & retail | 2026 |
| Moneyweb Limited | Financial services | 1997 |
| Monsoon Indian Cuisine Limited | Hospitality | 2014 |
| Moore & Sadler Limited | Construction | 2003 |
| Morley's of Harrogate Ltd | Real estate | 2005 |
| Motohire Limited | | 1987 |
| Mott Macdonald Bentley Ltd | Construction | 1999 |
| Mount Retail Limited | Transport & logistics | 2004 |
| Movehold Limited | | 1978 |
| Movley Enterprises Limited | | 1960 |
| Mowbray Development Limited | Real estate | 1965 |
| MS Photo Ltd | Professional & scientific | 2007 |
| Mulgrave Limited | Extraterritorial | 1998 |
| N & G Jones Plumbing & Heating Limited | Construction | 2003 |
| Naburn Leisure Limited | Arts & recreation | 2006 |
| Nacl Law Limited | Professional & scientific | 2016 |
| Natterjack Books Limited | Information & communication | 2007 |
| Natural Wonders Limited | Wholesale & retail | 2005 |
| NCD (York) Ltd | Professional & scientific | 2002 |
| NCL Services Ltd. | Professional & scientific | 2006 |
| Nearbylovefound Limited | Other services | 2025 |
| Neil Stead Ltd | Construction | 2002 |
| Netsat Aerials Limited | Information & communication | 2006 |
| New Cavendish Estates Limited | Extraterritorial | 1896 |
| New Equipment Holdings Limited | Financial services | 1984 |
| Newby FUN Factory Limited | Education | 2001 |
| Newdelta Limited | Real estate | 2001 |
| Newton Court (Filey) Management Company Limited | Real estate | 1998 |
| Nigel Atkinson's Bathroom Emporium Limited | Construction | 2002 |
| Nigel Blackburn Agencies Limited | Other services | 1994 |
| Nineteen York Road Malton Limited | Other services | 1981 |
| NO. 53 Residents Association Limited | Households | 2003 |
| NO.4 the Oval Harrogate Limited | Households | 2002 |
| Norman Court Residents Limited | Households | 2004 |
| Normanton Rise Management Company Limited | Real estate | 1983 |
| North of England Historic Railway Trust Limited | Transport & logistics | 2002 |
| North Yorkshire 3D Printers Limited | Professional & scientific | 2001 |
| Northallerton Properties Limited | Real estate | 1962 |
| Northern Business Consulting Limited | Professional & scientific | 2007 |
| Northern College of Acupuncture | Education | 1989 |
| Norton Court Properties Limited | Extraterritorial | 2007 |
| Norton Premier Limited | Wholesale & retail | 2024 |
| Nought Limited | Professional & scientific | 1999 |
| NRH Engineering Limited | Manufacturing | 2005 |
| Number 11 Portland Street (Management Company) York Limited | Households | 1984 |
| Number 36 Dragon Parade Maintenance Limited | Real estate | 1981 |
| Number 5 Westover Road (Scarborough) Management Company Limited | Real estate | 1996 |