| Rhino Rank Ltd | Information & communication | 2017 |
| Rhode Hill Management Limited | Real estate | 1997 |
| Ribeye Shrewsbury Limited | Hospitality | 2025 |
| Richard Beaman Estates Limited | Construction | 2001 |
| Richard Corbett Limited | Financial services | 2024 |
| Richard Dawes Fine Wine Limited | Wholesale & retail | 2007 |
| Richard Emery Ltd | Financial services | 2012 |
| Richard Heap Ltd | Financial services | 2022 |
| Richard Higgins Conservation Limited | Other services | 2003 |
| Richard Sherratt Builders Limited | Construction | 2002 |
| Richard Taylor-Duxbury Limited | Professional & scientific | 2023 |
| Richards and Cooke Plumbing and Heating Ltd | Construction | 2022 |
| Richards Groundworks Limited | Construction | 2019 |
| Richard’S House Limited | Construction | 2025 |
| Richerads Limited | Professional & scientific | 2020 |
| Riches Property LLP | | 2013 |
| Richmond Hill Management Ltd | Construction | 2011 |
| Rickman Furniture & Fine Joinery Ltd | Construction | 2014 |
| Ricky & Simone's Family Company Ltd | Real estate | 2022 |
| Ricsan Properties Limited | Construction | 2013 |
| Rideventures Ltd | Arts & recreation | 2012 |
| Ridge Fuels Ltd | Wholesale & retail | 2019 |
| Ridgebourne Management Limited | Professional & scientific | 2019 |
| Ridgewood Plate Racks Ltd | Manufacturing | 2026 |
| Riera Surg Ltd | Health & social care | 2019 |
| RIF Associates LLP | | 2017 |
| Rigare Limited | Administrative & support | 2008 |
| Right Haul Ltd | Transport & logistics | 2022 |
| Rights & Rules Ltd | Professional & scientific | 2025 |
| RIK Consultancy Limited | Professional & scientific | 2024 |
| Rimell Holdings Limited | Financial services | 2025 |
| Risdon & Risdon Ltd | Manufacturing | 2017 |
| Risdons Barbershop Ltd | Other services | 2016 |
| Rise Creative Studio Limited | Professional & scientific | 2013 |
| Rite Height Scaffolding ENG Ltd | Construction | 2025 |
| RITUALSY3 Ltd | Hospitality | 2025 |
| Riva Villa Ltd | Construction | 2016 |
| River Card Ltd | Financial services | 2024 |
| River DEE Machinery Ltd | Wholesale & retail | 1977 |
| River Marketing Limited | Wholesale & retail | 2018 |
| River's View Limited | Hospitality | 2025 |
| Riverside Cabins Limited | Real estate | 2012 |
| Riverside Court & Brantley Mews Management Company Limited | Real estate | 2005 |
| Riverside Landings Management Company Limited | Households | 2002 |
| Riverside Lodge and Chiswick Lodge Management Company Limited | Real estate | 2011 |
| Riverside Management Company (Boston) Limited | Households | 2010 |
| RJ Mullineux Limited | Construction | 2021 |
| RJD Developments Ltd | Construction | 2013 |
| RJR Holdings Limited | Arts & recreation | 2026 |
| RJT Access Limited | Construction | 2024 |
| RJW Groundworks Ltd | Construction | 2003 |
| RJW Metalworks Limited | Manufacturing | 2019 |
| RL Wildflower Seeds Limited | Agriculture & fishing | 2022 |
| Rllc Limited | Hospitality | 2022 |
| RM5 Limited | Professional & scientific | 2006 |
| RMC Farming Ltd | Agriculture & fishing | 2020 |
| RMD Property Development Limited | Extraterritorial | 2006 |
| RMW Electrical Holdings Limited | Financial services | 2012 |
| RMW Electrical Services Limited | Construction | 2001 |
| RMW Facilities Management Company Limited | Real estate | 2021 |
| RMW Fire and Security Ltd | Extraterritorial | 2014 |
| RNG Trading Ltd | Agriculture & fishing | 2013 |
| Roach Enterprises Limited | Professional & scientific | 2012 |
| Road Sport and Classic Ltd | Wholesale & retail | 2024 |
| Roadrunner Events Ltd | Arts & recreation | 2015 |
| ROB Freeman Ltd | Health & social care | 2012 |
| ROB Law Limited | Health & social care | 2010 |
| ROB Yescombe Limited | Information & communication | 2011 |
| Robert & Leigh Consultants Ltd | Professional & scientific | 2016 |
| Robert Davies & Co Limited | Professional & scientific | 2004 |
| Robert Davies Machinery Limited | Wholesale & retail | 2001 |
| Robert Mason Grain Limited | Wholesale & retail | 2020 |
| Roberts's Homes Ltd | Real estate | 2019 |
| Robest for HAJ and Umra Services Ltd | Hospitality | 2025 |
| Robin Tanulak Limited | Transport & logistics | 2020 |
| Robinshaw Property Ltd | Real estate | 2017 |
| Robinson House Management Limited | Real estate | 2005 |
| Robson Family Company Limited | Real estate | 2021 |
| Robson Stores Greenfields Limited | Wholesale & retail | 2003 |
| Robson Stores Limited | Wholesale & retail | 1999 |
| Robstech Consulting Ltd | Manufacturing | 2007 |
| Rochon IT Consultancy Limited | Information & communication | 2024 |
| Rocket Ride-Ons Ltd | Wholesale & retail | 2025 |
| Rockford House Management Company Limited | Households | 2013 |
| Rocksteady Films Limited | Information & communication | 2011 |
| Rocktel Services Limited | Real estate | 2000 |
| Rocliff (Holdings) Limited | Financial services | 2018 |
| Rocliff Limited | Other services | 2012 |
| Roden Renewables Limited | Agriculture & fishing | 2016 |
| Rodgers Knox & Co. Financial Planning | | 1997 |
| Rodington Court Residents Association Limited | Real estate | 1989 |
| Roger Parry and Partners LLP | | 2005 |
| Roger Parry Limited | Financial services | 2024 |
| Roger T Hulme Limited | Financial services | 2000 |
| Rogers Chiropractic Clinics Limited | Health & social care | 2023 |
| Rollerstrut LLP | | 2007 |
| Rolleston Leas (Rolleston) Residents Management Company Limited | Real estate | 2023 |
| Rolling Homes Camper Ltd | Manufacturing | 2015 |
| Rolls&Cones Limited | Hospitality | 2025 |
| Roman Place (Syston) Management Company Limited | Households | 2005 |