| Noble Interiors Ltd | Construction | 2011 |
| Noble Joinery Ltd | Construction | 2014 |
| Noble Shopfitters Ltd | Construction | 2014 |
| Nonpareil Care Limited | Health & social care | 2025 |
| North Clements Foot Health Ltd | Health & social care | 2017 |
| Northgate Structural Limited | Construction | 2012 |
| Norton Lifting Services Ltd | Professional & scientific | 2018 |
| Nous Creative Ltd | Professional & scientific | 2025 |
| Novus Healthcare Services Limited | Health & social care | 2023 |
| NSJ Systems Ltd | Construction | 2023 |
| Ntagencies Limited | Wholesale & retail | 2021 |
| NV Sips Plant Limited | Administrative & support | 2023 |
| Nxdigital Ltd | Information & communication | 2025 |
| O&M Landscapes Limited | Administrative & support | 2025 |
| Oakby Property Investment Limited | Real estate | 2021 |
| Oaktree Consultancy GM Ltd | Health & social care | 2023 |
| Oaktrees Home Improvements Ltd | Construction | 2022 |
| Oakview Windows and Doors Ltd | Construction | 2025 |
| OBL Electrical Ltd | Construction | 2026 |
| Official Creative Studio Limited | Professional & scientific | 2025 |
| OJ Vapes Ltd | Wholesale & retail | 2025 |
| OLA Future Ltd | Professional & scientific | 2016 |
| Olive Tree Support Services Ltd | Health & social care | 2022 |
| Oliver Henson Ltd | Professional & scientific | 2025 |
| Omega BMS Ltd | Professional & scientific | 2025 |
| Omoba Ventures UK Ltd | Wholesale & retail | 2024 |
| One Jazz Ltd | Information & communication | 2024 |
| One Stop 4 Equity Release Limited | Financial services | 2021 |
| One Touch Football Academy & Education Scholarship (16+) Limited | Education | 2018 |
| One Touch Football Soccer School Ltd | Arts & recreation | 2012 |
| Open Mind HCM Services Ltd | Information & communication | 2018 |
| Opico Limited | Wholesale & retail | 2007 |
| Orangecross Care Ltd | Health & social care | 2026 |
| Otect Limited | Manufacturing | 2022 |
| P & B Bradford Limited | Transport & logistics | 2014 |
| P&J Care Limited | Health & social care | 2024 |
| P.A.G.E. Architectural Systems Limited | Extraterritorial | 1996 |
| P.A.G.E. Enterprises Limited | Real estate | 1996 |
| P.A.G.E. Group (Peterborough) Limited | Construction | 1996 |
| P.E.D.C Holdings Limited | Financial services | 2019 |
| P.E.D.C Limited | Agriculture & fishing | 2019 |
| P.T. Fasteners Limited | Wholesale & retail | 2007 |
| Pacific Empire Foods UK Ltd | Wholesale & retail | 2006 |
| Packs and Pulls Ltd | Arts & recreation | 2025 |
| Paddock Engineering Ltd | Professional & scientific | 2021 |
| Paint a POT Place Bourne Limited | Arts & recreation | 2015 |
| PAK Process Consulting Limited | Professional & scientific | 2025 |
| Paradise City Cycles Ltd | Other services | 2014 |
| Paragon Ecom Solutions Ltd | Wholesale & retail | 2025 |
| Pareti Ltd | Construction | 2025 |
| Park Wood Dog Activity Centre Ltd | Other services | 2023 |
| Parkgate Services Limited | Professional & scientific | 2009 |
| Parkwood Pork Ltd | Manufacturing | 2007 |
| Paul Toseland (Grain) Limited | Wholesale & retail | 2005 |
| Pave K Ltd | Construction | 2017 |
| Paws in Motion Ltd | Professional & scientific | 2022 |
| PDT Investments Ltd | Hospitality | 2015 |
| Peak Growth Ltd. | Administrative & support | 2020 |
| Peasemore Business Services Limited | Professional & scientific | 2001 |
| Pegasus Property Solutions Ltd | Real estate | 2017 |
| Pension Liability Resolutions Ltd | Financial services | 2020 |
| Perfectstorm.Inc Ltd | Professional & scientific | 2010 |
| Pet Affairs Ltd | Other services | 2022 |
| Peter's Motor Co (Bourne) Ltd | Wholesale & retail | 2026 |
| Petorama Pet Shop Ltd | Wholesale & retail | 2016 |
| PH Medicare Ltd | Wholesale & retail | 2018 |
| Phil Smith Communications Ltd | Professional & scientific | 2015 |
| Phoenix 48 Limited | Water & waste | 2021 |
| Phoenix Advance Limited | Financial services | 2014 |
| Phoenix Biofuels Group Limited | Financial services | 2025 |
| Phoenix Claim Co Limited | Construction | 2022 |
| Phoenix Energy Management Soft Limited | Information & communication | 2020 |
| Phoenix Energy Trading Ltd | Financial services | 2023 |
| Phoenix Land and Building Group Limited | Financial services | 2025 |
| Phoenix Leisure Homes Ltd | Financial services | 2023 |
| Phoenix Office Solutions Ltd | Information & communication | 2020 |
| Phoenix Park & Lodge Group Ltd | Financial services | 2023 |
| Phoenix Park Developments Ltd | Financial services | 2023 |
| Phoenix Port Talbot Limited | Real estate | 2019 |
| Phoenix R&D Group Limited | Financial services | 2025 |
| Phoenix Renewables Group Limited | Financial services | 2025 |
| Phoenix Skegness Park & Housing Ltd | Financial services | 2023 |
| Phoenix Strategic Land Limited | Construction | 2022 |
| Phoenix Sustainable Investments (Division) Limited | Financial services | 2025 |
| Phoenix Sustainable Investments Limited | Financial services | 2022 |
| Phoenix Waste Group Limited | Financial services | 2025 |
| Phoenix Wind Solutions Ltd | Financial services | 2024 |
| Phsr Property Solutions Ltd | Households | 2025 |
| Pick Properties Limited | Real estate | 2003 |
| Pilbeam Motor Company Limited | Wholesale & retail | 2026 |
| Pilbeam Racing Designs Limited | Manufacturing | 1977 |
| PIM Engineering Inspection Services Limited | Professional & scientific | 2015 |
| Pinfold Roofing Limited | Construction | 2022 |
| Pink Bear Media Limited | Administrative & support | 2017 |
| Pinnacle Pace Limited | Real estate | 2025 |
| Pixel Panda Media Limited | Professional & scientific | 2025 |
| PJ Trans 83 Ltd | Transport & logistics | 2017 |
| PK Driving School Limited | Education | 2024 |
| POINT74 Limited | Information & communication | 2007 |
| Polonus Transport Ltd | Transport & logistics | 2021 |