| Ralph Daire Ltd | Energy | 2025 |
| Randall Engineering Limited | Manufacturing | 2007 |
| Random Collectables South West Ltd | Wholesale & retail | 2022 |
| Rapid Mobility Limited | Wholesale & retail | 2017 |
| Raven Financial Services Limited | Information & communication | 1999 |
| Ray's Chicken Limited | Hospitality | 2016 |
| Ray's Chicken Property Limited | Real estate | 2023 |
| RB Electronics Limited | Manufacturing | 2002 |
| Rbyr Limited | Information & communication | 2025 |
| Re-Cycool Limited | Wholesale & retail | 2025 |
| Read Woodruff Limited | Professional & scientific | 2008 |
| Real Eyes ESG Ltd | Information & communication | 2020 |
| Real World Services Limited | Administrative & support | 2001 |
| Records Transformation Ltd | Information & communication | 2018 |
| Rectory Park Management Limited | Real estate | 1981 |
| Red Crane Divers Limited | Manufacturing | 2024 |
| Red Gill Limited | Wholesale & retail | 2011 |
| Red House Freehold Limited | Households | 2019 |
| Red House Lettings Ltd | Real estate | 2015 |
| Red Panda Technology Ltd | Information & communication | 2022 |
| Redcliff Building Services Limited | Construction | 2025 |
| Redcliff Weymouth Limited | Hospitality | 2015 |
| Redemptore Ltd | Administrative & support | 2018 |
| Redfan Limited | Manufacturing | 1985 |
| Redmore Roofing Ltd | Construction | 2021 |
| Redmore Windows Ltd | Construction | 2026 |
| Redwood House Management Company Limited | Households | 2007 |
| Reed Heating LLP | | 2024 |
| Reflect and React Ltd | Other services | 2023 |
| Regal Building Services (SW) Ltd | Construction | 2025 |
| Regal Upholstery Ltd | Other services | 2009 |
| Regalcrown Properties Limited | Construction | 2002 |
| Regency Care and Mobility Ltd | Wholesale & retail | 2010 |
| Relay Coffee Ltd | Manufacturing | 2025 |
| Relight Group Ltd | Energy | 2021 |
| Remus Investments Limited | Hospitality | 2026 |
| Repono Holdings Limited | Financial services | 2021 |
| Reprint International Limited | Manufacturing | 2015 |
| Reprint Limited | Manufacturing | 2001 |
| Reprint Services Limited | Manufacturing | 2010 |
| Resh Property Limited | Real estate | 2024 |
| Residential Estates(Dorset)Limited | Real estate | 1969 |
| Residents Management (NO.86) Limited | Households | 1986 |
| Resort Media Limited | Professional & scientific | 2023 |
| Revamp Developers Limited | Information & communication | 2026 |
| Revival Property PVT Limited | Real estate | 2021 |
| REX Design Limited | Manufacturing | 2015 |
| Rhodium Properties Ltd | Real estate | 2019 |
| Ricardo Property Investments Ltd | Real estate | 2024 |
| Ricardo Sales Ltd | Wholesale & retail | 2015 |
| Rice and Sail Ltd | Hospitality | 2025 |
| Richard Shrubb Ltd | Information & communication | 2024 |
| Richard Woof Marine Limited | Manufacturing | 2010 |
| Richards and Puszkarz (Developments) Limited | Construction | 1987 |
| Richardson GAS & Renewables Limited | Construction | 2022 |
| Richardson Plumbing & GAS Limited | Construction | 2011 |
| Richmond Research Limited | Manufacturing | 1977 |
| Richpark Holdings Ltd | Construction | 2025 |
| Richpark Limited | Households | 1986 |
| Ricol Leisure Limited | Wholesale & retail | 2001 |
| Riderr Properties Ltd | Real estate | 2016 |
| Ridgeway Complete Services Limited | Wholesale & retail | 2014 |
| Ridyard Estate Agents Limited | Real estate | 2010 |
| Ridyard Lettings Limited | Real estate | 2010 |
| Ridyard Maintenance Limited | Construction | 2010 |
| Ringwood (Weymouth) Ltd | Real estate | 2017 |
| Rinovate Limited | Professional & scientific | 2017 |
| Ripp Limited | Financial services | 2026 |
| Rise Market & Bakery Ltd | Manufacturing | 2021 |
| Riverside Restaurant (Bridport) Limited | Hospitality | 2016 |
| RJC Parsons Limited | Public administration | 2008 |
| RJH Aquaculture Consultancy Limited | Agriculture & fishing | 2019 |
| RJM Consultancy Services Ltd | Professional & scientific | 2015 |
| RJM Contracts & SON Ltd | Construction | 2014 |
| RJS Cleaning Management Limited | Administrative & support | 2008 |
| RKD Transport Logistics Ltd | Transport & logistics | 2025 |
| RMA Precision LLP | | 2013 |
| RMG CNC Limited | Manufacturing | 2018 |
| RNR Inked Beauty Limited | Other services | 2024 |
| Roach Carpenters (Exeter) Limited | Construction | 1973 |
| ROB Oliver Window Cleaning Ltd | Administrative & support | 2009 |
| ROB Perry Garden Machinery Limited | Wholesale & retail | 2019 |
| ROB Perry Marine Ltd | Professional & scientific | 2001 |
| ROB Perry Marine Weymouth Limited | Manufacturing | 2009 |
| Robert Beeston Carpentry Limited | Construction | 2022 |
| Robert J Perry (Marine Surveyors) Ltd | Transport & logistics | 2012 |
| Robert Mowbray Limited | Education | 2010 |
| Roberts Foodservice Limited | Wholesale & retail | 2003 |
| Roberts Plumbing & Heating Limited | Construction | 2001 |
| Robinson Developments (London) Ltd | Real estate | 2014 |
| Rock Bars Limited | Hospitality | 2006 |
| Rock, Fudge and Gifts Limited | Wholesale & retail | 2016 |
| Rockabillyz Limited | Hospitality | 2021 |
| Rockpick Software Limited | Information & communication | 2026 |
| Rodden Farm Enterprise Ltd | Agriculture & fishing | 2024 |
| Rodden House Ltd | Hospitality | 2025 |
| Rodney Tompkin Fine Wines Limited | Wholesale & retail | 1999 |
| Roger Locke Consulting Limited | Professional & scientific | 1999 |
| Rogers Repointing Ltd | Construction | 2026 |
| Roll N Play Ltd | Wholesale & retail | 2025 |