| Montreux Property Holdings Limited | Arts & recreation | 2017 |
| Moon & Back Media Ltd | Information & communication | 2022 |
| Moonhats Limited | Professional & scientific | 2017 |
| Mosely Associates Limited | Professional & scientific | 2012 |
| Mount Felix (Walton on Thames) Residents Association Limited | Real estate | 1976 |
| Mrra (2018) Limited | Households | 2018 |
| MSP DV1 Limited | Construction | 2020 |
| Murray Pratt Limited | Health & social care | 2015 |
| Muuzart Limited | Professional & scientific | 2016 |
| My HR Careers Limited | Professional & scientific | 2013 |
| Myagent.Estate Limited | Real estate | 2024 |
| Mylife Addiction Rehabilitation Bidco Limited | Financial services | 2022 |
| Mylife Addiction Rehabilitation Midco Limited | Financial services | 2022 |
| Mylife Addiction Rehabilitation Topco Limited | Financial services | 2022 |
| Mylife Digital Counselling Services Limited | Health & social care | 2025 |
| Mylife Holdings Limited | Financial services | 2025 |
| Mylife Rehabilitation Limited | Financial services | 2025 |
| Mylife Residential Limited | Financial services | 2025 |
| Myomaster Limited | Wholesale & retail | 2018 |
| N E Compliance Consulting Limited | Financial services | 2013 |
| Nails Forever 44 Ltd | Other services | 2023 |
| Naturally Belize Limited | Extraterritorial | 2016 |
| Naturally Travels Limited | Administrative & support | 2007 |
| NB Lighting & Design Limited | Administrative & support | 2006 |
| Netvision Solutions Limited | Information & communication | 2024 |
| Next Step Clearance Ltd | Water & waste | 2025 |
| Nick Barras Cars Limited | Wholesale & retail | 2021 |
| Nick Palmer Design Ltd | Arts & recreation | 2011 |
| Nicklevale Limited | Wholesale & retail | 2007 |
| Nickolandro Limited | Administrative & support | 2022 |
| North Surrey Veterinary Emergencies Ltd | Professional & scientific | 2010 |
| NR Accountants Ltd | Professional & scientific | 2002 |
| O'Neill Consultants UK Ltd | Professional & scientific | 2019 |
| Oarsman Place Management Company Limited | Households | 1996 |
| OC Liveries Limited | Health & social care | 2024 |
| OC Polo Limited | Health & social care | 2025 |
| Octagon (Richmond) Limited | Construction | 2002 |
| OJT Ltd | Professional & scientific | 2023 |
| Olive and Basil Hampton Ltd | Hospitality | 2025 |
| Olney House Management Limited | Households | 2005 |
| Oneall Services Ltd | Construction | 2021 |
| Onestop Advisers Limited | Professional & scientific | 2020 |
| Opex Facilities Management Ltd | Other services | 2024 |
| Optima Growth Limited | Professional & scientific | 2022 |
| Optimus DQ Ltd | Information & communication | 2026 |
| Orgest Limited | Hospitality | 2024 |
| Osamco Limited | | 1978 |
| Otra Forma Limited | Manufacturing | 2016 |
| P&N Patel Ltd | Administrative & support | 2025 |
| P&P Patel Ltd | Administrative & support | 2018 |
| P&P Patel Properties Ltd | Real estate | 2022 |
| P2I Technologies Limited | Information & communication | 2026 |
| Padel X20 Ltd | Arts & recreation | 2025 |
| Palace Road Management (NO.24) Limited | Households | 2008 |
| Palmerstown Services Ltd | Professional & scientific | 2022 |
| Parabola Court Freehold Limited | Households | 2017 |
| Parabola Court Management Company Limited | Real estate | 2014 |
| Paragon Ocean Limited | Hospitality | 2012 |
| Parent Support Project Ltd | Education | 2018 |
| Parker Physiotherapy Limited | Administrative & support | 2017 |
| Parks, Dove & Company Limited | Professional & scientific | 1984 |
| Patoche Limited | Wholesale & retail | 2021 |
| Patric Adams Ltd | Construction | 2015 |
| Patterson Consultants Limited | Information & communication | 2023 |
| Paul Bates Interim Ltd | Information & communication | 2025 |
| Pavilion Chelsea Ltd | Other services | 2018 |
| PC Global Implex Ltd | Other services | 2024 |
| Peak Physiotherapy Practice Limited | Health & social care | 2006 |
| Pemberton Terrace Management Company Limited | Real estate | 2002 |
| Pendlebury House Limited | Construction | 2018 |
| Penlap Properties Limited | Real estate | 2020 |
| Pentagon Homes (Southern) Limited | Construction | 2004 |
| People Performance Limited | Professional & scientific | 2012 |
| Perrot Holdings Limited | Financial services | 1958 |
| Perspective Financial Advisory Limited | Professional & scientific | 2012 |
| Philia International Limited | Professional & scientific | 2009 |
| Phoenix Flooring Specialists Limited | Wholesale & retail | 2014 |
| PIE Consulting Ltd | Professional & scientific | 2009 |
| Pinnacle Padel Ltd | Wholesale & retail | 2025 |
| Pitch Marketing Communications Limited | Professional & scientific | 2018 |
| Playpadel Grendon Limited | Arts & recreation | 2025 |
| PLJ Developments Ltd | Real estate | 2016 |
| Pollit Ltd | Information & communication | 2025 |
| Pooler & Partners Ltd | Professional & scientific | 2019 |
| Poppy's ARC Ltd | Other services | 2025 |
| Preferhour Limited | Arts & recreation | 1991 |
| Primetek Solutions Limited | Professional & scientific | 1993 |
| Principle Business Systems Limited | Professional & scientific | 1986 |
| Pro Nursing Healthcare Ltd | Administrative & support | 2018 |
| Procision Limited | Construction | 2010 |
| Proelevate Limited | Professional & scientific | 2024 |
| Propertize Residential Ltd | Construction | 2023 |
| Prospera Research Ltd | Professional & scientific | 2021 |
| PT4PB Limited | Other services | 2013 |
| Pucara Ltd | Professional & scientific | 2022 |
| Pure White Lines Worldwide Ltd | Wholesale & retail | 2026 |
| PW Celebrant Services Ltd | Other services | 2026 |
| Quarmby Group Limited | Health & social care | 2016 |
| Quick Property Sale Limited | Real estate | 2005 |
| R & L Matham Media Ltd | Wholesale & retail | 2019 |