| Print My Part Ltd | Manufacturing | 2017 |
| Prior Associates (Soham) Limited | Professional & scientific | 2016 |
| Prism Media Products Limited | Manufacturing | 1992 |
| Prism Sound Limited | Manufacturing | 1987 |
| Private Cellar Reserves LLP | | 2011 |
| Privilege Development Finance Limited | Financial services | 2018 |
| Privilege Eco Finance Limited | Financial services | 2020 |
| Privilege Finance Limited | Administrative & support | 2015 |
| Privilege Holdings Limited | Professional & scientific | 2015 |
| Privilege Investments Limited | Professional & scientific | 2011 |
| Privilege Project Finance 2 Limited | Financial services | 2013 |
| Privilege Project Finance 3 Limited | Financial services | 2020 |
| Privilege Project Finance 4 Limited | Financial services | 2021 |
| Privilege Project Finance 5 Limited | Financial services | 2021 |
| Privilege Project Finance 6 Limited | Financial services | 2021 |
| Privilege Project Finance Limited | Financial services | 2001 |
| Privilege Renewable Finance 2 Limited | Financial services | 2021 |
| PRJ Media Ltd | Information & communication | 2012 |
| PRN Statistical Consulting Services Ltd. | Administrative & support | 2014 |
| Pro Build Carpentry and Building Limited | Construction | 2023 |
| Pro Care Websites Ltd | Professional & scientific | 2025 |
| Pro Investing Limited | Real estate | 2026 |
| Pro Plumbing & Heating Ltd | Other services | 2019 |
| Pro Steel Buildings Limited | Construction | 2023 |
| Pro-Line Interiors Ltd | Construction | 2017 |
| Proaltus Industries Limited | Construction | 2008 |
| Procare Quality Services Limited | Health & social care | 2013 |
| Process Sensing Technologies Ltd. | Professional & scientific | 2016 |
| Prodata Associates Limited | Wholesale & retail | 1996 |
| Proedge Associates Limited | Real estate | 2016 |
| Proedge Construction Limited | Construction | 2014 |
| Project 75 Limited | Professional & scientific | 2014 |
| Project Management Resolutions Limited | Other services | 2016 |
| Property 76 Limited | Real estate | 2025 |
| Property Aspects Limited | Real estate | 2023 |
| Property Innovation Limited | Real estate | 2010 |
| Protech Amusement Rides Ltd | Manufacturing | 2025 |
| PS Hair Limited | Other services | 2017 |
| PS Technology Research Ltd | Information & communication | 2024 |
| PSB Electrical & Air-Conditioning Ltd | Construction | 2026 |
| PSC Construction (Newmarket) Limited | Construction | 2011 |
| PST Group Holdings Ltd | Financial services | 2016 |
| Psychonovo Publishing Limited | Information & communication | 2018 |
| Pulsewise Ltd | Information & communication | 2023 |
| Pupa's Shop Ltd | Wholesale & retail | 2019 |
| Purcell Accountancy Services Limited | Professional & scientific | 2024 |
| Purcell Freelance Solutions Ltd | Professional & scientific | 2013 |
| Pure Heat Insulation Ltd | Administrative & support | 2025 |
| Pureclad Ltd | Construction | 2015 |
| Pureflow Exteriors Ltd | Health & social care | 2025 |
| Purple Advantage Limited | Professional & scientific | 2024 |
| Purple Rock Investments Limited | Wholesale & retail | 2006 |
| Purplepower Recruitment Ltd | Administrative & support | 2006 |
| PWL Dance Ltd | Arts & recreation | 2025 |
| Pypers Hill Farms Limited | Agriculture & fishing | 1984 |
| Q & a Cambridge Properties Ltd | Real estate | 2025 |
| Q Range Ltd | Construction | 2023 |
| QAV EOT Limited | Administrative & support | 2025 |
| QAV Limited | Information & communication | 2001 |
| QEW Cambridge LLP | | 2007 |
| QS Consulting Limited | Professional & scientific | 2017 |
| QUA FEN Communications Ltd | Information & communication | 2021 |
| Quality AMR Ltd | Administrative & support | 2025 |
| Quality Home Care Anglia Limited | Health & social care | 2015 |
| Quality House Limited | Wholesale & retail | 2018 |
| Quality Roof Cladding Ltd | Construction | 2021 |
| Quantum Mind, Body and Soul Coaching Limited | Administrative & support | 2025 |
| Quarterway Construction Ltd | Construction | 2009 |
| Quarterway House Limited | Real estate | 2020 |
| Queen Edith's and ELY Therapy Centres | Health & social care | 2007 |
| Quentin Flat Management Company Limited | Households | 1977 |
| Quentin Flats 23/33 RTM Company Limited | Extraterritorial | 2023 |
| Quentin Flats 35/45 RTM Company Limited | Extraterritorial | 2023 |
| Questlink Associates Limited | Professional & scientific | 2003 |
| Quick Sprout Ltd | Other services | 2019 |
| Quinteiro Astbury Properties Ltd | Real estate | 2010 |
| Quintessential (Cambridge) Limited | Wholesale & retail | 2003 |
| Quiptolabs Consulting Limited | Information & communication | 2014 |
| Quonset Ltd | Administrative & support | 2014 |
| R & C Consulting Limited | Administrative & support | 2005 |
| R B H Contractors | Agriculture & fishing | 2012 |
| R H Carpentry and Building Limited | Construction | 2025 |
| R Palmer & Sons Limited | Manufacturing | 2005 |
| R S Prepress Services LLP | | 2010 |
| R W M (Laboratory & Office Services) Limited | Construction | 2013 |
| R. Turner (Haulage) Limited | Transport & logistics | 1982 |
| R.Hills Landscape Services Ltd | Administrative & support | 2023 |
| R.N.Morris & SON Limited | Real estate | 1957 |
| Radford Electronics Ltd | Manufacturing | 2005 |
| RAG Developments Limited | Professional & scientific | 2018 |
| Raglan Projects Ltd | Professional & scientific | 2021 |
| Rags and Bakpaks Ltd | Wholesale & retail | 2020 |
| Rakckb Limited | Hospitality | 2019 |
| Ralavi Ltd | Construction | 2022 |
| Rampton Drift Residents Company Limited | Real estate | 2000 |
| Rana Capital Limited | Real estate | 2016 |
| Randall Engineering Services Limited | Manufacturing | 2001 |
| Randox AD Limited | Energy | 2010 |
| Ranjan Property Investment Ltd | Real estate | 2025 |
| Rapid Relief Recovery Room Ltd | Health & social care | 2025 |