| Reflex Energy Services Limited | Professional & scientific | 2012 |
| Reflex Foundation C.I.C. | Other services | 2012 |
| Regain (SW) Ltd | Extraterritorial | 2010 |
| Regal Nails & Spa 1 Ltd | Other services | 2025 |
| Regencyfx Ltd | Financial services | 2020 |
| Reggie Beaver Properties Ltd | Real estate | 2016 |
| Regima Building Services Limited | Construction | 2025 |
| Rehasense (UK) Limited | Health & social care | 2018 |
| Reiki Across Borders Limited | Education | 2021 |
| Remain Investments Limited | Real estate | 2022 |
| Renaissance Medical Artistry Ltd | Other services | 2024 |
| Rene Chorley Ltd | Health & social care | 2016 |
| Renwicks Cafe Ltd | Hospitality | 2024 |
| Rescue Information Consultancy Ltd | Transport & logistics | 2025 |
| Reservoir Apartments Management Company Limited | Households | 2008 |
| Resme Ltd. | Wholesale & retail | 2023 |
| Resolute Building and Renovation Ltd | Construction | 2022 |
| Resolute SW Ltd | Extraterritorial | 2024 |
| Resolution.Psd Ltd | Professional & scientific | 2005 |
| Resource Medical Locums Limited | Administrative & support | 2024 |
| Restronguet Developments Limited | Construction | 2011 |
| Revitalise Harmonia Limited | Health & social care | 2025 |
| Revolutionary Engineering & Digital Design Ltd | Information & communication | 2021 |
| REX Farms Limited | Agriculture & fishing | 1995 |
| RF Maritime Works Ltd | Professional & scientific | 2025 |
| RG Kellow Ltd | Construction | 2007 |
| RH Cummings Ltd | Real estate | 2021 |
| RHG Property SW Ltd | Real estate | 2024 |
| Rhino Projects (SW) Limited | Construction | 2018 |
| Rhos Construction Limited | Construction | 1996 |
| Rhosnoweth Developments Limited | Construction | 2006 |
| Richard Burton Window Solutions Ltd | Construction | 2015 |
| Richard Fish Consultancy Limited | Professional & scientific | 2009 |
| Richard Lenihan-Thomas Financial Management Services Ltd | Professional & scientific | 2024 |
| Richard Pizey Ltd | Professional & scientific | 2022 |
| Richens Limited | Professional & scientific | 2004 |
| Richie Norton Ltd | Wholesale & retail | 2021 |
| Ride on Holdings Ltd | Wholesale & retail | 2021 |
| Ridge House Management Company Limited | Households | 2004 |
| Riding & Driving for the Disabled - Chiverton Group | Arts & recreation | 2013 |
| RIG Roseland Ltd | Manufacturing | 2016 |
| Rigginsew Ltd | Arts & recreation | 2022 |
| Right EYE Ltd | Professional & scientific | 2015 |
| Rippons Bakery Limited | Real estate | 1965 |
| Risk Ojea | Financial services | 2025 |
| Riventa Ltd | Manufacturing | 2000 |
| River Holdings Limited | Real estate | 2020 |
| River House Bookkeeping Ltd | Administrative & support | 2013 |
| Riverrun Construction Ltd | Construction | 2020 |
| Riverrun Developments Ltd | Construction | 2020 |
| Riverrun Holdings Ltd | Financial services | 2025 |
| Riverside Grampound Ltd | Construction | 2021 |
| Riverside Studios Ltd | Professional & scientific | 2010 |
| Rjmjs 4 Limited | Energy | 2016 |
| RJS Cornwall Limited | Wholesale & retail | 2011 |
| RJZ Beach Limited | Real estate | 2016 |
| RK Door Systems Ltd | Wholesale & retail | 2013 |
| RK Doorsystems (Broxbourne) Limited | Extraterritorial | 2014 |
| RK Ironmongery Limited | Wholesale & retail | 2022 |
| RK Steel Limited | Wholesale & retail | 2016 |
| RKH Developments Limited | Construction | 2015 |
| RLA Cornwall Limited | Administrative & support | 2023 |
| Rlct Ltd | Real estate | 2014 |
| RM Technology Ltd | Information & communication | 2023 |
| RMU Property Limited | Real estate | 2024 |
| RNA Social Performance Solutions Limited | Professional & scientific | 2019 |
| RND Investments Limited | Financial services | 2021 |
| RNH (West END) Limited | Households | 1995 |
| Roark Design & Surveying Ltd | Professional & scientific | 2018 |
| ROB Taylor Limited | Wholesale & retail | 2020 |
| Robai Ltd | Manufacturing | 2023 |
| Robertson Developments Holdings Limited | Financial services | 2017 |
| Robertson Developments Ltd | Construction | 2006 |
| Rocco's GIN & Retro Bar Ltd | Wholesale & retail | 2018 |
| Roche Rock Property Management Company Limited | Real estate | 2008 |
| Rock Long Limited | Real estate | 2025 |
| Rock Pool Bar & Restaurants Limited | Hospitality | 2015 |
| Rock Road Ltd | Construction | 2017 |
| Rock View Vets Limited | Professional & scientific | 2015 |
| Rockguild Limited | Extraterritorial | 1997 |
| Rockley Civil Engineering Limited | Construction | 2025 |
| Rockstar (Scilly) Limited | Hospitality | 2014 |
| Rockstar Bishop Ltd | Hospitality | 2025 |
| Rockville Property Management Company Limited | Households | 2013 |
| Rodgers Consultancy Specialists Ltd | Manufacturing | 2012 |
| Roger Best Limited | Professional & scientific | 2010 |
| Roger Trethewy Limited | Agriculture & fishing | 2016 |
| Rope Access, Rigging & Rescue Ltd | Construction | 2016 |
| Rope Walk Court Management Limited | Real estate | 1994 |
| Ropewalk Limited | Manufacturing | 2009 |
| Roscarrack Developments Ltd | Real estate | 2015 |
| Roscarrack House Limited | Health & social care | 2008 |
| Rose Court (Bowndervean) Management Company Limited | Households | 2007 |
| Rose Heritage Builders Limited | Construction | 2022 |
| Rose Valley Management Company (2017) Limited | Households | 2017 |
| Rosedown Eggs Limited | Wholesale & retail | 2016 |
| Rosehill Residents Association Company Limited | Households | 2009 |
| Roseland CLT Ltd | Real estate | 2007 |
| Roseland Construction Ltd | Construction | 2019 |
| Roseland Furniture Limited | Wholesale & retail | 2011 |