| Morfa Gardens Management Company Limited | Households | 1969 |
| Mortimer Environmental Ltd | Professional & scientific | 2018 |
| MPA Financial Management Limited | Financial services | 2000 |
| MPA Wealth Investment Limited | Financial services | 2021 |
| MPA Wealth Management Ltd | Professional & scientific | 2014 |
| MQP Limited | Manufacturing | 2000 |
| Naeco Estates Limited | Real estate | 2024 |
| Napier Capital Partners Limited | Financial services | 2023 |
| National Business Register Corporate Services Limited | Other services | 2015 |
| National Business Register Group Limited | Administrative & support | 2015 |
| Neodymium Eco-Energy Services Limited | Wholesale & retail | 2006 |
| Network Nouveau Limited | Professional & scientific | 2010 |
| New Town Park Toddington Management Company Limited | Households | 2018 |
| Newbold Terrace Apartments (Leamington Spa) Management Company Limited | Households | 2010 |
| Nexalus Limited | Information & communication | 2020 |
| Nexgen IT Solutions Limited | Information & communication | 2016 |
| Nobel EBT Limited | Other services | 2020 |
| Nobel Midco Limited | Financial services | 2017 |
| Northern 2 VCT PLC | Financial services | 1999 |
| Northern 3 VCT PLC | Financial services | 2001 |
| Northern Venture Trust PLC | Financial services | 1995 |
| NRG Stems Limited | Other services | 2017 |
| Nyghar Ltd | Administrative & support | 2020 |
| O & Co (IRE) Limited | Real estate | 2022 |
| O&A Sutcliffe Ltd | Professional & scientific | 2023 |
| Oakley Land Limited | Real estate | 2023 |
| Oakley Two Limited | Construction | 2018 |
| Occhio Ltd | Real estate | 2009 |
| OHM Clothing Limited | Manufacturing | 2025 |
| OIC Group Ltd | Real estate | 2024 |
| Opus Land Nuneaton Limited | Construction | 2022 |
| Orbis Care Limited | Health & social care | 2021 |
| Origin Growth Limited | Information & communication | 2018 |
| Osborne Living Canada Water Ltd | Real estate | 2022 |
| Osborne Living Limited | Real estate | 2021 |
| Osbourne House Management Company Limited | Households | 2003 |
| Ouch First AID Training Ltd | Public administration | 2011 |
| Outlawz Media Limited | Information & communication | 2004 |
| Oxford Cambridge Consultants Network (Occn) Limited | Professional & scientific | 2008 |
| Ozone VET Services Ltd | Professional & scientific | 2023 |
| Pack Properties Limited | Real estate | 2009 |
| Parachute Project Management Limited | Professional & scientific | 2009 |
| Park House (Bridge END) Management Company Limited | Households | 1998 |
| Park Venture Limited | Hospitality | 2019 |
| Passive Fire Limited | Public administration | 2015 |
| Peacey and Carr Limited | Real estate | 2018 |
| Pearl Consulting Ltd | Professional & scientific | 2011 |
| Pebbles Project UK Limited | Education | 2007 |
| Peevers.Co Limited | Health & social care | 2025 |
| Peevort Ltd | Professional & scientific | 2025 |
| Perrins & Co Limited | Real estate | 2021 |
| Peterscroft Management Limited | Households | 1995 |
| Petrek MAY Properties Limited | Real estate | 2024 |
| Phil Deans Consultancy Services Limited | Information & communication | 2025 |
| Philadelphia Church of GOD | Education | 2004 |
| Pieceland Limited | Construction | 2013 |
| PJK (Canalside Dublin) Ltd | Real estate | 2021 |
| PJK Developments (Hilden Mill) Ltd | Real estate | 2017 |
| PJK Developments (Sandyford) Ltd | Real estate | 2020 |
| PJK Developments (Walsall) Limited | Real estate | 2017 |
| PJK Investments (Riverside Evesham) Limited | Real estate | 2017 |
| Planwell Limited | Professional & scientific | 2013 |
| Plogbook Ltd | Information & communication | 2024 |
| Polo Horses Limited | Wholesale & retail | 2014 |
| Port Penlee Waterside Developments Limited | Real estate | 2012 |
| Prema Homes Limited | Real estate | 2002 |
| Prime Properties Warwickshire Ltd | Real estate | 2025 |
| Prochology Limited | Wholesale & retail | 2022 |
| Prodmedia Limited | Information & communication | 2004 |
| Profitable Maintenance Limited | Professional & scientific | 2024 |
| PROGRESSIVE83 Ltd | Administrative & support | 2019 |
| Propmedia Ltd | Information & communication | 2008 |
| Protein Life Express Limited | Hospitality | 2017 |
| Pure Service Limited | Professional & scientific | 2011 |
| Pure White Beauty Clinic Limited | Other services | 2017 |
| PV Hotel SPV Limited | Hospitality | 2021 |
| Quad 4 Services Ltd | Wholesale & retail | 2017 |
| Quadriga Management Limited | Professional & scientific | 2010 |
| Quantum Trainers Ltd | Other services | 2021 |
| Quicksum Limited | Professional & scientific | 2024 |
| Rainier Developments Limited | Construction | 2014 |
| Rainier Real Estate (Ipsley) Limited | Real estate | 2024 |
| Rakker Property Holdings Limited | Financial services | 2025 |
| Rattlechain Redevelopments Ltd | Real estate | 2018 |
| RC Henley Limited | Hospitality | 2019 |
| RC Windowcleaning Limited | Other services | 2002 |
| Redford Developments (Charles Green) Limited | Construction | 2014 |
| Redford Developments (Crawley) Limited | Real estate | 2020 |
| Redford Developments (EON) Limited | Construction | 2026 |
| Redford Developments (Farnham) Limited | Real estate | 2021 |
| Redford Developments (Nottingham) Limited | Real estate | 2022 |
| Redford Developments (Paradise Street) Limited | Construction | 2021 |
| Redford Developments (Russell Way) Limited | Real estate | 2023 |
| Redford Developments (Swindon) Limited | Construction | 2026 |
| Redford Developments Limited | Construction | 2023 |
| Regal (West Point) Limited | Construction | 2000 |
| Regal Property Group Limited | Real estate | 1994 |
| Regency Place Management Company Limited | Professional & scientific | 1999 |
| Regents Green (Leamington Spa) Estate Management Company Limited | Households | 2016 |
| REJ Services Warwickshire Ltd | Administrative & support | 2024 |