| Redford & Walkers Limited | Hospitality | 2024 |
| Redford Finance Office Limited | Administrative & support | 2026 |
| Redseven Dorset Ltd | Professional & scientific | 2019 |
| Redwood Blinds Limited | Construction | 2022 |
| Redwood Pharma Consulting Limited | Professional & scientific | 2014 |
| Reeve (South) Ltd | Construction | 2024 |
| Reeve Street Mortgage Solutions Ltd | Financial services | 2017 |
| Refined Roofing and Renovations Limited | Construction | 2022 |
| Reflectocom Communications Ltd | Information & communication | 2023 |
| Refrigeration Services Limited | Professional & scientific | 2010 |
| Refrigeration Specialists Limited | Manufacturing | 2010 |
| Regent House Property Management Limited | Households | 2017 |
| Regina House 22 Carlton Road North Weymouth Freehold Limited | Real estate | 2016 |
| Regina House Management Limited | Households | 1985 |
| Reharmonise Ltd | Information & communication | 2025 |
| Rehsals Creations Ltd | Health & social care | 2020 |
| Reiffer Media Ltd | Professional & scientific | 2017 |
| Relationships Wessex Limited | Health & social care | 1998 |
| Relentless Management Limited | Professional & scientific | 2007 |
| Relish Creating Limited | Wholesale & retail | 2012 |
| Reloved Ltd | Hospitality | 2008 |
| Rely HR & Training Limited | Professional & scientific | 2023 |
| Rely HR Ltd | Professional & scientific | 2015 |
| Rely Ltd | Professional & scientific | 2012 |
| Rely Training Ltd | Professional & scientific | 2015 |
| Renaissance Corporation Limited | Wholesale & retail | 1994 |
| Renoufs Pantry Poole Limited | Wholesale & retail | 2021 |
| Renoufs Restaurant Limited | Extraterritorial | 2015 |
| Renoufs Wine Bars Limited | Hospitality | 2015 |
| Renoufs Wine Bars NO.2 Limited | Hospitality | 2017 |
| Renoufs Wine Bars NO.3 Limited | Hospitality | 2017 |
| Renoufs Wine Bars NO.4 Limited | Hospitality | 2018 |
| Renoufs Wine Bars NO.5 Limited | Hospitality | 2018 |
| Renoufs Wine Bars Poole Limited | Hospitality | 2021 |
| Rented Apps Limited | Extraterritorial | 2014 |
| Reset Residential Ltd | Real estate | 2025 |
| Resolution Quantity Surveying Limited | Professional & scientific | 2012 |
| Resolutions IT Limited | Information & communication | 2014 |
| Response Partners UK Limited | Financial services | 2025 |
| Retro Classics Ltd. | Wholesale & retail | 1997 |
| Revels Lakes Ltd | Agriculture & fishing | 2001 |
| REX Lovelace Limited | Agriculture & fishing | 1957 |
| RGF Skin & Glow Ltd | Wholesale & retail | 2026 |
| Rgsw Properties Ltd | Real estate | 2022 |
| Rhubarb Homes Ltd | Real estate | 2024 |
| Ribis Limited | Wholesale & retail | 2006 |
| Ribrak Ltd | Wholesale & retail | 2024 |
| Richard Parker Flooring Ltd | Construction | 2026 |
| Richmond House Management Company (Crewkerne) Limited | Households | 2000 |
| Richmond Redmile Limited | Administrative & support | 1981 |
| Riderr Motorcycle Products Ltd | Wholesale & retail | 2024 |
| Ridge Farms Limited | Agriculture & fishing | 1997 |
| Ridgeway Community Radio CIC | Information & communication | 2017 |
| RIG Properties Ltd | Construction | 2024 |
| Right/Super Motorsport Limited | Arts & recreation | 2025 |
| Rightworkx Ltd | Other services | 2019 |
| Ringstead Caravan Company Limited | Hospitality | 1978 |
| Ringstead Escape 24 Ltd | Hospitality | 2026 |
| Rippler Ltd | Information & communication | 2023 |
| Rising Wellness Ltd. | Administrative & support | 2021 |
| Rite Advice Limited | Professional & scientific | 2003 |
| River Laboratory Limited | Extraterritorial | 2020 |
| Riverbank Computing Limited | Information & communication | 2001 |
| Riverside Court (Dorchester) Management Limited | Households | 1986 |
| RJ Industries Limited | Manufacturing | 2007 |
| RJB Medical Products Ltd | Wholesale & retail | 2017 |
| RJM Windows Limited | Construction | 2004 |
| RJS Decorating Limited | Construction | 2015 |
| RJS Properties (Dorset) Limited | Real estate | 2019 |
| RJT Elite Performance Limited | Arts & recreation | 2025 |
| Rlat Holdings Limited | Real estate | 2023 |
| RLS Roofing & Leadwork Specialist Ltd | Construction | 2023 |
| Rmbates Consultancy Limited | Professional & scientific | 2019 |
| Rmho Consulting Limited | Professional & scientific | 2016 |
| RMS Southwest Ltd | Wholesale & retail | 2025 |
| RNM Ltd | Construction | 2017 |
| Road and Racing Performance Limited | Wholesale & retail | 2010 |
| Roast Beast Limited | Hospitality | 2021 |
| Robert Angell Financial Services Limited | Administrative & support | 2003 |
| Robert Cotton Limited | Construction | 2006 |
| Robert Eversden Limited | Agriculture & fishing | 1961 |
| Robert JON Wilson Ltd | Real estate | 2024 |
| Robertsj Ltd | Wholesale & retail | 2022 |
| Robertsjhousehold Ltd | Wholesale & retail | 2025 |
| Robin Kitchin Limited | Information & communication | 2014 |
| Robins Garth Management Company Limited | Households | 1988 |
| Robinson Electrical South West Ltd | Construction | 2023 |
| Roboltz UK Ltd | Information & communication | 2024 |
| Rock on Events UK Limited | Administrative & support | 2019 |
| Rockbound Resin Surfacing Ltd | Construction | 2016 |
| Rocket Surgery Limited | Health & social care | 2019 |
| Rocseven Ltd | Professional & scientific | 2026 |
| ROD Wheatley Limited | Construction | 2012 |
| Roger Wightman Retail Consulting Limited | Administrative & support | 2020 |
| Roke Farm Limited | Agriculture & fishing | 1964 |
| Rolls Landscaping Ltd | Administrative & support | 2015 |
| Romaine Stuart Limited | Administrative & support | 1978 |
| RON Dyson Consultancy Ltd | Administrative & support | 2019 |
| Rory Smith Limited | Administrative & support | 2015 |
| Rosewall Osmington Mills LLP | | 2012 |