| Peak Idea Consultancy (PIC) Limited | Professional & scientific | 2024 |
| Peak Sensors (Holding) Limited | Financial services | 2017 |
| Peak Sensors (Property) Limited | Real estate | 2017 |
| Peak Sensors Limited | Manufacturing | 1997 |
| Peakin-Fear Consulting Engineers LLP | | 2021 |
| Peaks Storehouse Limited | Real estate | 1996 |
| Pear & Olive Limited | Extraterritorial | 2018 |
| Pear Face Ltd | Administrative & support | 2019 |
| Pearbridge Limited | Professional & scientific | 2012 |
| Pearce Creative Consultancy Ltd | Professional & scientific | 2012 |
| Pearl Electrical Limited | Construction | 2018 |
| Pearlbay IT Ltd | Information & communication | 2023 |
| Pearlica Ltd | Wholesale & retail | 2004 |
| Pearlmountain Ltd | Extraterritorial | 2014 |
| Pearmont Publishing Ltd | Information & communication | 2025 |
| Pearson Digital Limited | Information & communication | 2000 |
| Pearson Farms Limited | Information & communication | 2010 |
| Pearson Information Limited | Information & communication | 1997 |
| Pearson Kavanagh Limited | Real estate | 2016 |
| Peatwaterwise Ltd | Information & communication | 2026 |
| Pebble Global Brain Limited | Transport & logistics | 2019 |
| Pebmed Limited | Health & social care | 2020 |
| Pechlofg Ltd | Manufacturing | 2023 |
| Peckcraft Kitchens Ltd | Manufacturing | 2024 |
| Pedal & Brass Limited | Manufacturing | 2021 |
| Pedal Fit Ltd | Arts & recreation | 2010 |
| Pedelecs Limited | Information & communication | 2012 |
| Pedro Harrison Ltd | Professional & scientific | 2021 |
| Peek a BOO Cambridge Nursery LLP | | 2016 |
| Peek Interiors Limited | Manufacturing | 2016 |
| Peekaboo Camb Ltd | Hospitality | 2026 |
| Peeke-Vout Investments Ltd | Financial services | 2016 |
| Peepsio Limited | Information & communication | 2025 |
| Peerboom Limited | Professional & scientific | 2005 |
| Pegasus Global Limited | Financial services | 2024 |
| Pegasus Office Solutions Ltd | Wholesale & retail | 2021 |
| PEI YAO International Limited | Wholesale & retail | 2022 |
| Peiss Industrial Automation Co., Ltd. | Extraterritorial | 2019 |
| Peixeiro Ltd | Manufacturing | 2025 |
| Peking Restaurant (Cambridge) Ltd | Hospitality | 2012 |
| Pelham Power Limited | Manufacturing | 2020 |
| Pelin Milica Ltd | Manufacturing | 2025 |
| Pelle PUB Company LLP | | 2015 |
| Pellis AI Ltd | Health & social care | 2025 |
| Peloton Trading Limited | Financial services | 2009 |
| Pelvihealth Ltd | Health & social care | 2019 |
| PEM Audit Limited | Professional & scientific | 2024 |
| PEM Cambridge Limited | Professional & scientific | 2015 |
| PEM Corporate Finance LLP | | 2002 |
| PEM Financial Ltd | Professional & scientific | 2015 |
| PEM Group LLP | | 2023 |
| PEM Real Estate Ltd | Real estate | 2024 |
| Pembroke Legacy Limited | Real estate | 2025 |
| Pembroke Valves, Flanges & Fittings Ltd | Wholesale & retail | 2014 |
| Pembroke Waters (Cambourne) Management Company Limited | Households | 2000 |
| Pembroke Waters Cambourne Management Company NO. 2 Limited | Households | 2001 |
| Pemena Limited | Professional & scientific | 2013 |
| PEN Leasing Ltd | Wholesale & retail | 2024 |
| Pendleton Events Ltd | Administrative & support | 2004 |
| Peng Cheng Property Holding Limited | Construction | 2018 |
| Pengar Ltd | Administrative & support | 2023 |
| Pengcheng Wanli Co., Ltd | Wholesale & retail | 2024 |
| Penguin DRY Cleaners Ltd | Other services | 2018 |
| Penguin Property (Cambridge) Limited | Real estate | 2019 |
| Penn Farm Physio Limited | Health & social care | 2006 |
| Penny Bell Limited | Information & communication | 2012 |
| Penny Trading Limited | Wholesale & retail | 2019 |
| Penrose Etrm Limited | Professional & scientific | 2026 |
| Penrose Research Limited | Wholesale & retail | 2026 |
| Pensiotec Ltd | Financial services | 2025 |
| Penteconter Limited | Other services | 2024 |
| Pentelei Composites Ltd | Manufacturing | 2022 |
| Pentland Place Management Limited | Administrative & support | 2017 |
| Pentland Strategy Consulting Limited | Information & communication | 2014 |
| Pentlands Court Residents' Association Limited | Households | 1983 |
| Peopld Limited | Information & communication | 2026 |
| People & Performance Ltd | Professional & scientific | 2004 |
| People and Change Solutions Limited | Professional & scientific | 2020 |
| People and Places Partnership Limited | Professional & scientific | 2014 |
| People Puzzles Limited | Professional & scientific | 2010 |
| Peppers Farming Company Limited | Agriculture & fishing | 2009 |
| Percentage Profit Future Co., Limited | Extraterritorial | 2023 |
| Percheron Investments Limited | Professional & scientific | 2002 |
| Perfect Balance BIO Limited | Professional & scientific | 2020 |
| Perfect Care Group Limited | Health & social care | 2023 |
| Perfect Cleaning Services (Cambridge) Ltd | Administrative & support | 2005 |
| Perfect Condition Limited | Arts & recreation | 2003 |
| Perfect Eyebrows Ltd | Other services | 2024 |
| Perfect Paving & Landscaping Ltd | Administrative & support | 2023 |
| Perfect Pitch Recording Services Limited | Information & communication | 2005 |
| Perfect Places (UK) Holdings Limited | Financial services | 2023 |
| Perfect Publishers Limited | Information & communication | 2005 |
| Perfect World Trade Limited | Information & communication | 2024 |
| Performance Pharmatech Ltd. | Health & social care | 2008 |
| Performance Roofing Ltd | Construction | 2017 |
| Performance UK Limited | Agriculture & fishing | 2005 |
| Perhaphstf Ltd | Hospitality | 2025 |
| Periphyseos Press Limited | Information & communication | 2012 |
| Perissos Foods Limited | Wholesale & retail | 2024 |
| Perocycle Limited | Water & waste | 2024 |