| Cambridge Perfusion LLP | | 2002 |
| Cambridge Perfusion Services Holdings LLP | | 2009 |
| Cambridge Personal Genomics Limited | Professional & scientific | 2006 |
| Cambridge Phone Hub Ltd | Wholesale & retail | 2023 |
| Cambridge Photographers Ltd | Professional & scientific | 2014 |
| Cambridge Photon Technology Limited | Professional & scientific | 2019 |
| Cambridge Physiotherapy Clinic Limited | Health & social care | 2022 |
| Cambridge Pianoforte LLP | | 2011 |
| Cambridge Picture Company Ltd | Information & communication | 2016 |
| Cambridge Pizza Town Ltd | Hospitality | 2016 |
| Cambridge Plant Interiors Limited | Agriculture & fishing | 2003 |
| Cambridge Plant Ltd | Construction | 2014 |
| Cambridge Pledge Foundation | Health & social care | 2025 |
| Cambridge PMO Ltd | Real estate | 2010 |
| Cambridge Polar Consultants Limited | Professional & scientific | 2012 |
| Cambridge Polaris Limited | Professional & scientific | 2010 |
| Cambridge Policy & Research Hub Ltd | Professional & scientific | 2025 |
| Cambridge Polo Academy Limited | Education | 2022 |
| Cambridge Polo Club Ltd | Arts & recreation | 2015 |
| Cambridge Populus Ltd | Administrative & support | 2018 |
| Cambridge Power (Woodham Ferrers) Limited | Manufacturing | 2026 |
| Cambridge Power Electronics Limited | Professional & scientific | 2012 |
| Cambridge Power Limited | Manufacturing | 2020 |
| Cambridge Power Solar Limited | Manufacturing | 2026 |
| Cambridge Prime Developments Ltd | Construction | 2023 |
| Cambridge Prime Ltd | Financial services | 2020 |
| Cambridge Private GPS LLP | | 2024 |
| Cambridge Pro Clean Ltd | Administrative & support | 2026 |
| Cambridge Pro Ltd | Wholesale & retail | 2026 |
| Cambridge Procognitive Discovery Limited | Professional & scientific | 2018 |
| Cambridge Professional Academy Limited | Education | 1997 |
| Cambridge Professional Properties Limited | Construction | 2006 |
| Cambridge Professional Trainers Ltd | Education | 2022 |
| Cambridge Programmes Limited | Education | 1993 |
| Cambridge Progressive Medicine Ltd. | Administrative & support | 2019 |
| Cambridge Projects Limited | Professional & scientific | 1993 |
| Cambridge Properties Investment Ltd | Real estate | 2024 |
| Cambridge Property Cleaning and Maintenance Ltd | Administrative & support | 2017 |
| Cambridge Property Consulting Limited | Professional & scientific | 2019 |
| Cambridge Property Executives Limited | Real estate | 2021 |
| Cambridge Property Innovations Ltd | Real estate | 2021 |
| Cambridge Property Investment Limited | Real estate | 2026 |
| Cambridge Property Lettings Limited | Real estate | 2006 |
| Cambridge Property Management Limited | Real estate | 2010 |
| Cambridge Property Partnership LLP | | 2025 |
| Cambridge Property Search Limited | Real estate | 2014 |
| Cambridge Property Services Limited | Construction | 2024 |
| Cambridge Protein Arrays Limited | Wholesale & retail | 2010 |
| Cambridge Protein Works Limited | Manufacturing | 2013 |
| Cambridge Psychiatry Limited | Health & social care | 2019 |
| Cambridge Psychodynamic Limited | Health & social care | 2019 |
| Cambridge Psychology for Schools Limited | Education | 2021 |
| Cambridge Psychology Services Ltd | Health & social care | 2024 |
| Cambridge Publishing Ltd. | Information & communication | 1980 |
| Cambridge Punters Ltd | Transport & logistics | 2017 |
| Cambridge Punting Company Ltd | Administrative & support | 2016 |
| Cambridge Quarterly Publications LLP | | 2008 |
| Cambridge Quranic Centre Ltd | Education | 2023 |
| Cambridge RA Limited | Professional & scientific | 2010 |
| Cambridge Radio Limited | Information & communication | 1996 |
| Cambridge Raman Imaging Ltd | Professional & scientific | 2018 |
| Cambridge Re-Use | Wholesale & retail | 2010 |
| Cambridge Rebores Engineering Limited | Wholesale & retail | 2012 |
| Cambridge Rebores Holdings Limited | Financial services | 2014 |
| Cambridge Rebores Limited | Wholesale & retail | 2001 |
| Cambridge Regional Wiring Ltd | Construction | 2009 |
| Cambridge Removals Ltd | Construction | 2024 |
| Cambridge Reproductive and Gynaecological Care LLP | | 2024 |
| Cambridge Research and Engineering Limited | Professional & scientific | 2014 |
| Cambridge Research Computing Limited | Information & communication | 2018 |
| Cambridge Research Insights Ltd | Professional & scientific | 2017 |
| Cambridge Research Solutions Ltd | Health & social care | 2014 |
| Cambridge Residential Lettings Limited | Real estate | 2016 |
| Cambridge Revealed Ltd | Administrative & support | 2025 |
| Cambridge Rewinds Limited | Other services | 2002 |
| Cambridge Rhythm Management Limited | Health & social care | 2016 |
| Cambridge Rider Ltd | Transport & logistics | 2024 |
| Cambridge Risk & Intelligence Ltd | Professional & scientific | 2025 |
| Cambridge Risk Management Ltd | Professional & scientific | 2011 |
| Cambridge Riverside (Kingsley Walk) (NO.2) Management Company Limited | Professional & scientific | 2015 |
| Cambridge Riverside (Midsummer Common) Management Company Limited | Households | 2011 |
| Cambridge RNA Technologies Ltd | Professional & scientific | 2025 |
| Cambridge Roofers Ltd | Construction | 2014 |
| Cambridge Roofing Contractors Limited | Construction | 2025 |
| Cambridge Roofing Supplies Limited | Construction | 2026 |
| Cambridge Rowing Ltd | Wholesale & retail | 2021 |
| Cambridge Rugby Limited | Arts & recreation | 2026 |
| Cambridge Russian Academy | Education | 2015 |
| Cambridge Saints Limited | Hospitality | 2015 |
| Cambridge Sauce Ltd | Manufacturing | 2020 |
| Cambridge Scaffold Hire Ltd | Construction | 2017 |
| Cambridge Scaffold Limited | Construction | 2018 |
| Cambridge Scaffolding Limited | Construction | 2024 |
| Cambridge Scholars Innovative Academy Ltd | Professional & scientific | 2023 |
| Cambridge Scholarships Services Limited | Other services | 2024 |
| Cambridge School of Art & Design Limited | Professional & scientific | 1997 |
| Cambridge School of Education | Education | 2017 |
| Cambridge School of Education Global Ltd | Administrative & support | 2024 |
| Cambridge School of Visual & Performing Arts Limited | Professional & scientific | 1989 |
| Cambridge Sci-Tech Industry College Limited | Professional & scientific | 2023 |