| Raftech Ltd | Manufacturing | 2024 |
| RAG N Shine Ltd | Administrative & support | 2025 |
| Rainbow Property (Cornwall) Limited | Real estate | 2014 |
| Rainbows END Training Limited | Administrative & support | 2017 |
| RAS Management Solutions Ltd | Extraterritorial | 2020 |
| Ravendale Films Limited | Information & communication | 2016 |
| Rbqs Ltd | Professional & scientific | 2021 |
| RCH Cornwall Limited | Construction | 2018 |
| Rcyc Onshore Limited | Extraterritorial | 2023 |
| Rcyc Property Limited | Professional & scientific | 1911 |
| Rcyc Sailing Limited | Arts & recreation | 2010 |
| RDA Systems Ltd | Health & social care | 2023 |
| Real Life Media Groups Ltd | Professional & scientific | 2020 |
| Realwelcome Property Management Limited | Professional & scientific | 1992 |
| Reamplanet Limited | Professional & scientific | 1999 |
| Rebecca Wass Ltd | Professional & scientific | 2016 |
| Red Ensign Marine Limited | Wholesale & retail | 2007 |
| Red Ice Limited | Wholesale & retail | 2003 |
| Red Planet Books Limited | Information & communication | 2021 |
| Red Planet Media Limited | Information & communication | 2019 |
| Red Planet Publishing Limited | Information & communication | 2013 |
| Red River Events Ltd | Hospitality | 2024 |
| Red Robin Pantry Ltd | Hospitality | 2021 |
| Red Willow Holdings Ltd | Wholesale & retail | 2013 |
| Red Willow Properties Ltd | Real estate | 2019 |
| Redborne Metropolis Ltd | Hospitality | 2017 |
| Redmist Racing Ltd | Professional & scientific | 2003 |
| Redshift Property Ltd | Real estate | 2016 |
| Reflect Marine Limited | Transport & logistics | 2021 |
| Reflect Yachts Limited | Extraterritorial | 2021 |
| Regional Municipal Hire Limited | Real estate | 1999 |
| Repairs by Mollie Ltd | Construction | 2023 |
| Rescicler Ltd | Mining & quarrying | 2025 |
| Research Development UK Ltd | Professional & scientific | 2018 |
| Research Instruments Limited | Manufacturing | 1997 |
| Resolute Interiors Ltd. | Construction | 2024 |
| Retallack Woodlands Limited | Arts & recreation | 2017 |
| Revill Reve Ltd | Real estate | 2024 |
| Rhiannon Jones Ltd | Professional & scientific | 2019 |
| RHW Motors Ltd | Wholesale & retail | 2025 |
| RIA Poole Consultancy Ltd | Professional & scientific | 2022 |
| Richard Davis Developments Limited | Construction | 2018 |
| Richard's Specialist Cars Limited | Wholesale & retail | 2008 |
| Ridercamtvtours Limited | Other services | 2024 |
| Ridgmont Properties Limited | Real estate | 2017 |
| Ringwood Fitness Ltd | Arts & recreation | 2025 |
| Rise and Climb CIC | Health & social care | 2025 |
| Riverside Support Service Ltd | Administrative & support | 2021 |
| Riverside's Community Connections CIC | Health & social care | 2026 |
| Riverview Capital Management Limited | Households | 2015 |
| RJH GAS & Heating Limited | Construction | 2018 |
| RJW Commercial Ltd | Real estate | 2026 |
| RJW Real Estate Ltd | Real estate | 2022 |
| RJW Trading Ltd | Wholesale & retail | 2018 |
| RLS Legal Recruitment Ltd | Administrative & support | 2021 |
| RNR Construction Ltd | Construction | 2022 |
| Roar and Rise Ltd | Wholesale & retail | 2025 |
| ROB Vankalsbeek Limited | Professional & scientific | 2008 |
| Robert Macknight Limited | Transport & logistics | 2017 |
| Robinsons Woodburners Ltd | Other services | 2024 |
| Robospace Limited | Real estate | 2018 |
| Rochester Composites and Coatings Ltd | Manufacturing | 2025 |
| Roots and Shoots Falmouth Limited | Wholesale & retail | 2020 |
| Rosebay Court Ltd | Construction | 2020 |
| Roseford Holdings Ltd | Real estate | 2019 |
| Roseland Plumbing & Heat Pumps Limited | Construction | 2023 |
| Rosewood Psychology for Health Ltd | Health & social care | 2025 |
| Rosi Systems Limited | Information & communication | 2009 |
| Round & About Cornwall Ltd | Transport & logistics | 2026 |
| Rowe Design Ltd | Professional & scientific | 2024 |
| Rowse Developments Limited | Construction | 2002 |
| Royalty Relief Limited | Professional & scientific | 2018 |
| RPM Displays Ltd | Arts & recreation | 2021 |
| Runestoneos Ltd | Professional & scientific | 2026 |
| Rustler Yachts Limited | Manufacturing | 2000 |
| RYB AŃ MOR Property Ltd | Real estate | 2025 |
| S & C Valles Property Limited | Real estate | 2024 |
| S & P Sandwiches Limited | Wholesale & retail | 2009 |
| S Dunstan Diving & EOD Limited | Administrative & support | 2014 |
| S J Annear and SON LLP | | 2026 |
| S J L Plumbing & Heating Ltd | Construction | 2006 |
| S. & M. Metals Limited | Administrative & support | 1980 |
| S.Sessions Ltd | Manufacturing | 2025 |
| Saarever Ltd | Wholesale & retail | 2023 |
| Sabai Thai Limited | Hospitality | 2020 |
| Sabu Developments Ltd | Construction | 2019 |
| Sadiq Associates Limited | Health & social care | 2024 |
| Safer Travels Limited | Professional & scientific | 2015 |
| Safety Training Unit Falmouth Ltd | Education | 2021 |
| Sail Cornwall Limited | Arts & recreation | 2016 |
| Sail Training South West Ltd | Education | 2022 |
| Sailors Jail Gallery Ltd | Wholesale & retail | 2023 |
| Salis Property Ltd | Real estate | 2025 |
| Salonfit Limited | Construction | 2008 |
| Salt and Paper Ltd | Arts & recreation | 2025 |
| Salt Art Supply Ltd | Wholesale & retail | 2023 |
| Salt Wind Covers Limited | Manufacturing | 2026 |
| Salthouse Properties Ltd | Real estate | 2020 |
| SAM Buswell Classic Car Restoration and Probate Services Limited | Wholesale & retail | 2025 |
| Sami-K Creative Ltd | Wholesale & retail | 2020 |