| Moore Physio Limited | Education | 2007 |
| Morc Electrical Ltd | Construction | 2003 |
| Morc Electrical Services Ltd | Construction | 2002 |
| Moxton Properties Ltd | Real estate | 2022 |
| MR2 Owners Club Limited | Other services | 2007 |
| MRC Developments (Nottm) Limited | Real estate | 2006 |
| MRH Agency Limited | Wholesale & retail | 2007 |
| MSW (Holdings) Limited | Professional & scientific | 2002 |
| Muddy Spaniel Bars Ltd | Hospitality | 2024 |
| Mudi Ltd | Wholesale & retail | 2021 |
| Muslim Charity : Helping the Needy | Health & social care | 1999 |
| N & R Properties Limited | Real estate | 2020 |
| N Foulkes Ltd | Administrative & support | 2007 |
| Natural Solutions Services Limited | Arts & recreation | 2020 |
| Naturescape Wildflowers LLP | | 2022 |
| Neil Beers Electrical Services Limited | Construction | 2007 |
| New Hollybeck Nurseries Limited | Wholesale & retail | 2002 |
| Newadvance Property Management Limited | Households | 1992 |
| Newark & Nottinghamshire Agricultural Society | Other services | 1983 |
| Newark Cattle Market Company Limited | Wholesale & retail | 1972 |
| Newark Marina Limited | Manufacturing | 1983 |
| Newark Storage Company Limited | Other services | 1992 |
| Newfield Farm(Screveton)Limited | Agriculture & fishing | 1948 |
| News & Booze Conway Limited | Wholesale & retail | 2023 |
| Newtons Accountants Limited | Professional & scientific | 1998 |
| Nick Coupe Building Services Limited | Construction | 2003 |
| Nigel Moss Transport Limited | Transport & logistics | 2006 |
| Nine Derby Terrace Limited | Extraterritorial | 2000 |
| Nirootell International Limited | Information & communication | 2022 |
| NO 1 High Pavement Limited | Professional & scientific | 1993 |
| NO Claims Limited | Arts & recreation | 2001 |
| NO1. Carers 4 YOU Limited | Other services | 2023 |
| Nocton FEN Farms Limited | Agriculture & fishing | 2007 |
| Nordtrak Limited | Professional & scientific | 2005 |
| North Accountancy Services Limited | Professional & scientific | 1997 |
| North Farm Tuxford Road Management Company Limited | Households | 2007 |
| North Leverton Windmill Co.,Limited | Other services | 1956 |
| Northern Foods Plus Limited | Wholesale & retail | 2014 |
| Northgate Business Centre Limited | Real estate | 2001 |
| Norwood Park Golf Course Limited | Arts & recreation | 1998 |
| Nottingham Forest Women’S Football Club Limited | Arts & recreation | 1999 |
| Nottingham Travel (UK) Ltd | Administrative & support | 2007 |
| Nottinghamshire Sexual Violence Support Services Ltd | Health & social care | 2003 |
| Novita Property Ltd | Real estate | 2026 |
| Nu-Flu Chimney Lining Systems Limited | Construction | 2003 |
| Number 75 Design Limited | Manufacturing | 2012 |
| Oakleigh Lodge Social Club Limited | Hospitality | 1966 |
| Oaktree Developments (Nottinghamshire) Limited | Construction | 1998 |
| Oakweb Design Ltd | Information & communication | 2003 |
| Oceans of FUN Limited | Arts & recreation | 2006 |
| Ocho Media Tech Limited | Wholesale & retail | 2005 |
| Olap Computing Limited | Information & communication | 2006 |
| Omega Controls Limited | Manufacturing | 2001 |
| One Corner Limited | Financial services | 2007 |
| Optical Fibre Solutions Limited | Wholesale & retail | 1991 |
| Optimal Chef Services Ltd | Administrative & support | 2023 |
| Optimal Project Management Ltd | Information & communication | 2006 |
| ORB Apartments Limited | Real estate | 2007 |
| Orchard (Dialysis 2) Limited | Extraterritorial | 2003 |
| Orchard (Dialysis 3) Limited | Extraterritorial | 2003 |
| Oss-I-Chaff Limited | Agriculture & fishing | 1996 |
| OWL Nest EGG Ltd | Real estate | 2024 |
| P & a Barratt Limited | Construction | 2007 |
| P & J Guthrie Properties Ltd | Real estate | 2000 |
| P J Moir Limited | Energy | 2005 |
| P R Headland Agricultural & Industrial Services Limited | Agriculture & fishing | 2007 |
| P.A.C. Supplies Ltd. | Wholesale & retail | 1999 |
| P.J. Reilly & Sons Limited | Construction | 2003 |
| Pabla Medical Services Limited | Health & social care | 2002 |
| Pandrol UK Limited | Manufacturing | 1945 |
| Papplewick Farms Limited | Agriculture & fishing | 1960 |
| Paragon Law Limited | Professional & scientific | 2003 |
| Park Stores (Lenton) Limited | Wholesale & retail | 2002 |
| Parkin Asset Management Ltd | Real estate | 2024 |
| Pathfinder (Newark) Limited | Transport & logistics | 1985 |
| Paul Applegate Limited | Wholesale & retail | 2002 |
| Paul Rogers Cars Ltd | Wholesale & retail | 2010 |
| Peak Property and Land Limited | Hospitality | 2005 |
| Pearson Industrial Doors Ltd | Wholesale & retail | 2020 |
| Pegasus Coachways Limited | Transport & logistics | 1983 |
| Pegglets Limited | Hospitality | 2005 |
| Penfold Investments Ltd | Real estate | 2025 |
| Pestaid Pest Control, Environmental & Property Services Ltd | Professional & scientific | 2006 |
| Peter Smith Collective Limited | Arts & recreation | 2006 |
| Peter Thompson Photography Limited | Professional & scientific | 1986 |
| Phoenix Refrigeration Limited | Manufacturing | 2004 |
| Piano Home Ltd | Real estate | 2024 |
| Pickering Investments Limited | Financial services | 1971 |
| Pipeline Services (Derbyshire) Limited | Construction | 2002 |
| Plating Engineering Limited | Manufacturing | 2002 |
| Plumtree Developments Limited | Construction | 2007 |
| PMG (Notts) Limited | Wholesale & retail | 2006 |
| Polly Bowls Club Community Interest Company | Arts & recreation | 2006 |
| Pratt & Gelsthorpe, Limited | Wholesale & retail | 1926 |
| Premier Bending Limited | Extraterritorial | 2003 |
| Premier Service Centre Limited | Wholesale & retail | 2005 |
| Primachem Limited | Wholesale & retail | 2002 |
| Prime Precision Holdings Ltd | Financial services | 2019 |
| Priority Healthcare Limited | Financial services | 2000 |
| Priory Motors Limited | Wholesale & retail | 1996 |