| Rojan (UK) Ltd | Administrative & support | 2013 |
| Rojo Investments Limited | Real estate | 2024 |
| Rojo Property ORS Limited | Real estate | 2024 |
| Rokewood Limited | Agriculture & fishing | 2002 |
| Rolak Limited | Real estate | 2017 |
| Role Mapper Technologies Ltd | Information & communication | 2019 |
| Rollestone Construction Limited | Construction | 2012 |
| Rolls Bridge Holdings Limited | Professional & scientific | 2016 |
| Roman Bridge Management Company Limited | Real estate | 2002 |
| Roman Couriers Ltd | Transport & logistics | 2026 |
| Roman Ioan 1175 Limited | Transport & logistics | 2015 |
| Roman Studio Ltd | Manufacturing | 2022 |
| Romiley Hand Car Wash Ltd | Administrative & support | 2022 |
| Romore Limited | Real estate | 2000 |
| Romore Properties Ltd | Real estate | 2019 |
| Ronde Holdings 1 Ltd | Professional & scientific | 2026 |
| Ronde Strategy Limited | Professional & scientific | 2018 |
| Roni (SW) Ltd | Real estate | 2026 |
| Rooboo Investments Ltd | Real estate | 2018 |
| Roof Estimating Services Ltd | Construction | 2024 |
| Roof Rite Roofing Contractors Limited | Manufacturing | 2013 |
| Rooffix Ltd | Construction | 2019 |
| Rooftrain (UK) Limited | Education | 2011 |
| Rookie Fit Limited | Arts & recreation | 2020 |
| Root and Branch (Training) Limited | Education | 2009 |
| Rooted Health Nutrition Ltd | Wholesale & retail | 2020 |
| Roots & Wings Devon Ltd | Agriculture & fishing | 2022 |
| Roots to Market Limited | Extraterritorial | 2017 |
| ROQ Online Ltd | Wholesale & retail | 2017 |
| ROR Digital Ltd | Professional & scientific | 2022 |
| Roraima Limited | Wholesale & retail | 2018 |
| Rosalvo Ltd | Real estate | 2022 |
| Rosche Partitions Ltd | Construction | 2015 |
| Rose Care Group Limited | Financial services | 2012 |
| Rose Duryard Management Company Limited | Households | 1997 |
| Rosehill Advisors Limited | Real estate | 2020 |
| Rosehill Projects LLP | | 2023 |
| Roselink Limited | Wholesale & retail | 2003 |
| Rosemil Property Lettings Limited | Real estate | 2026 |
| Rosemont Court (Exeter) Limited | Households | 1975 |
| Rosemont Court (NO.2) (Exeter) Limited | Households | 1977 |
| Roseveare Tractors Limited | Real estate | 1944 |
| Roshcom Ltd | Real estate | 2021 |
| Rosie and Rudy Hotdogs Limited | Hospitality | 2025 |
| Ross and Morgan Partners Limited | Professional & scientific | 2026 |
| Ross Fanyinka Ltd | Health & social care | 2021 |
| Ross Hoey Limited | Professional & scientific | 2011 |
| Ross Image Rights Limited | Arts & recreation | 2024 |
| Rossiter Property Ltd | Other services | 2020 |
| Rotamic Engineering Limited | Manufacturing | 2004 |
| Rotamic Precision Holdings Limited | Financial services | 2022 |
| Rotamic Systems Limited | Manufacturing | 1996 |
| Rothelm Limited | Real estate | 1953 |
| Rotten Robots Ltd | Manufacturing | 2026 |
| Rougemont Court (Exminster) Limited | Households | 1992 |
| Rougemont Property LLP | | 2010 |
| Roundel Clothing Ltd | Wholesale & retail | 2017 |
| Roundspace Limited | Education | 2010 |
| Roundswell (Barnstaple) Management Company Limited | Households | 2024 |
| Route 2 Topsham Ltd | Hospitality | 2022 |
| ROUTE2 Training & Consultancy Limited | Administrative & support | 2022 |
| Rowden Court Management Company Limited | Real estate | 1986 |
| Rowe Cleaning Services Domestic Division Ltd | Administrative & support | 2025 |
| Rowe Cleaning Services Ltd | Administrative & support | 2023 |
| Rowe Group Holdings Limited | Financial services | 2024 |
| Rowe Properties (Devon) Limited | Construction | 2013 |
| Rowe Properties Homes Limited | Construction | 2004 |
| Rowlands Leisure Limited | Arts & recreation | 2008 |
| Rowles Solar Park Limited | Energy | 2013 |
| ROX Star London Ltd | Professional & scientific | 2024 |
| Royal Grange Court Management Limited | Households | 1999 |
| Royson Superyachts Ltd | Extraterritorial | 2010 |
| Royston Community Solar Project C.I.C. | Energy | 2015 |
| Royston Solar Project Limited | Energy | 2015 |
| RP5 Cargo Limited | Transport & logistics | 2024 |
| RP5 Express Cargo Limited | Extraterritorial | 2011 |
| RPG Fast Ltd | Transport & logistics | 2022 |
| RPM Logistics Ltd | Administrative & support | 2019 |
| RPN Motor Services Ltd | Wholesale & retail | 2017 |
| RPS Engineers Ltd | Professional & scientific | 2024 |
| RS Aylesbeare Ltd | Construction | 2021 |
| RS Capital Group Ltd | Financial services | 2024 |
| RS Coaching and Consulting Limited | Professional & scientific | 2017 |
| RS Developments (South West) Ltd | Construction | 2013 |
| RS Developments Group Limited | Financial services | 2022 |
| RS EXE Cleaning Services Ltd | Administrative & support | 2026 |
| RS Seaton Limited | Construction | 2021 |
| RSA International Ltd | Real estate | 2023 |
| RSC Builders Ltd | Construction | 2022 |
| RSC Developments Ltd | Construction | 2025 |
| RSG13 Limited | Professional & scientific | 2018 |
| RT Parris Limited | Wholesale & retail | 2002 |
| RT Screen & Design Limited | Manufacturing | 2001 |
| RTC Logitrans Ltd | Other services | 2017 |
| RTP Property and Development Ltd | Construction | 2023 |
| RTP Surveyors Holdings Limited | Financial services | 2018 |
| RTP Surveyors Limited | Professional & scientific | 2008 |
| Ruairi Cunnane Ltd | Health & social care | 2014 |
| Rubber Flat Roof Ltd | Construction | 2019 |
| Ruben Maye Ltd | Professional & scientific | 2023 |