| Pryor Farm Produce Ltd | Hospitality | 2026 |
| Pryors Garage Limited | Wholesale & retail | 2009 |
| PS Carwash Ltd | Administrative & support | 2025 |
| PS Wealth Ltd | Financial services | 2022 |
| Psico Limited | Wholesale & retail | 2017 |
| PSM Reid Masters Ltd | Professional & scientific | 2019 |
| Psychcomms Ltd. | Information & communication | 2016 |
| Ptvg Limited | Real estate | 2014 |
| Pull Tuck Pinch Limited | Financial services | 2017 |
| Pulse Events SW Ltd | Hospitality | 2025 |
| Pulsewave Services Limited | Wholesale & retail | 2010 |
| Pure Daisy Cleaning Company Ltd | Administrative & support | 2023 |
| Purely Cornish EGG Co Ltd | Wholesale & retail | 2025 |
| Purla Ltd | Construction | 2003 |
| Push FM Limited | Wholesale & retail | 2022 |
| PW Jennings LLP | | 2023 |
| PWG Consulting Ltd | Professional & scientific | 2021 |
| Pydar Place Ltd | Construction | 2016 |
| Pyne Yacht Consulting Limited | Professional & scientific | 2013 |
| Pysa Limited | Information & communication | 2011 |
| Q Brands Plus Limited | Wholesale & retail | 2018 |
| Q Winning World Limited | | 2015 |
| Q18 Ltd | Information & communication | 2026 |
| Qantx Ltd | Financial services | 2021 |
| QBP Facilities Management Limited | Administrative & support | 2026 |
| QBP Holdings Limited | Financial services | 2025 |
| QMH Management Company Limited | Households | 2010 |
| Quadmove (Cornwall) Limited | Households | 2005 |
| Quadmove (Trustee) Limited | Households | 2005 |
| Qualitee Caterers Limited | Hospitality | 2023 |
| Quality Stairs Limited | Construction | 2019 |
| Quantum Web Solutions Ltd | Information & communication | 2023 |
| Quark Partners Ltd | Information & communication | 2022 |
| Quay Design & One Stop Printers Ltd | Manufacturing | 2018 |
| Quay Orthodontics Limited | Health & social care | 2025 |
| Quay Property Services (Southwest) Ltd | Construction | 2024 |
| Queensway Laundermat Limited | Professional & scientific | 1964 |
| Queer Kernow CIC | Arts & recreation | 2020 |
| Quick Panda Productions Limited | Arts & recreation | 2011 |
| Quite Rude Ltd | Financial services | 2021 |
| Qumran Care Limited | Health & social care | 2010 |
| R & J Mortgages Ltd | Financial services | 2014 |
| R & L Walker Limited | Health & social care | 2022 |
| R B Enterprises Ltd | Hospitality | 1999 |
| R G S Heating Limited | Construction | 2011 |
| R H R Group Limited | Financial services | 2015 |
| R H R Topco Limited | Financial services | 2026 |
| R Hudson Heating and Plumbing Ltd | Construction | 2023 |
| R J Commercials (Cornwall) Limited | Wholesale & retail | 2023 |
| R J M Property Developments Ltd | Construction | 2011 |
| R J Trevail Limited | Transport & logistics | 2013 |
| R James & SON Builders Ltd | Real estate | 2014 |
| R Perry and Sons Ltd | Transport & logistics | 2026 |
| R&S Plumbing and Heating Services Limited | Construction | 2025 |
| R&T Property Management Ltd | Real estate | 2019 |
| R.E Tonkin & SON Ltd | Other services | 2016 |
| RAA Consulting Services Limited | Professional & scientific | 2017 |
| Rabbit Hole Places Limited | Agriculture & fishing | 2017 |
| Rachel Bateman Consultancy Ltd | Professional & scientific | 2020 |
| RAD Catering Cornwall Limited | Hospitality | 2022 |
| Radical WAX Ltd | Other services | 2022 |
| Radio ST Austell Bay Community Interest Company | Information & communication | 2005 |
| Radix Trustee Limited | Professional & scientific | 2021 |
| Rags South West Ltd | Wholesale & retail | 2017 |
| Railway Modellers Club Limited | Other services | 2020 |
| Rainbow's END in Roseland Ltd | Professional & scientific | 2009 |
| Raison Opticians Limited | Wholesale & retail | 2013 |
| RAM Gasket Solutions Limited | Manufacturing | 2004 |
| Rampant Digital LLP | | 2021 |
| Randle Hospitality Ltd | Hospitality | 2022 |
| Ranelagh Mews Management Limited | Households | 1996 |
| Rannji Developments Limited | Construction | 2020 |
| Ranzy Limited | Health & social care | 2020 |
| Raretrade Limited | | 1988 |
| RAT Corp Limited | Other services | 2015 |
| Raven Holdings (Tresco) LLP | | 2018 |
| Rawm Property Ltd | Real estate | 2020 |
| RBS Groundworks Limited | Construction | 2002 |
| RDP Holdings (Cornwall) Limited | Financial services | 2014 |
| RDP Properties (Cornwall) Limited | Real estate | 2022 |
| Re:Now Consultancy Ltd | Professional & scientific | 2026 |
| Reactive Testing Ltd | Information & communication | 2011 |
| Rebelicious Ltd | Wholesale & retail | 2021 |
| Recalling Fire Ltd | Health & social care | 2022 |
| Recovery Designs Developments Ltd | Hospitality | 2025 |
| Recovery Designs Ltd | Construction | 2025 |
| Red Chilli Cuisine Limited | Hospitality | 2022 |
| Red Chilli Takeaway Limited | Hospitality | 2014 |
| Red House Developments Limited | Extraterritorial | 1958 |
| Red Robin Property Services Ltd | Real estate | 2024 |
| Redborne Capital Ltd | Hospitality | 2023 |
| Redfoxdata Limited | Professional & scientific | 2024 |
| Redgrave Commercial Ltd | Real estate | 2017 |
| Redruth Meadery Limited | Real estate | 2010 |
| Redruth Recreation Ground Limited | Real estate | 2021 |
| Redwood Plumbing Ltd | Construction | 2021 |
| Reef Knot Productions Limited | Information & communication | 2024 |
| Reef Services Ltd | Education | 2019 |
| Reen Cross Holiday Park Limited | Hospitality | 2021 |
| Reflections SW CIC | Health & social care | 2009 |