| Renmac Engineering Limited | Professional & scientific | 2022 |
| Rent Locally Lettings Ltd | Real estate | 2017 |
| Requiem Deep Sleep Limited | Wholesale & retail | 2025 |
| Residence Estate Agents Limited | Real estate | 2012 |
| Resilient Roots Limited | Arts & recreation | 2024 |
| Resolve PK Ltd | Professional & scientific | 2016 |
| Response Healthcare Solutions Ltd | Health & social care | 2021 |
| Restora Recovery Ltd | Wholesale & retail | 2025 |
| Retail UN- Limited | Wholesale & retail | 2018 |
| Revilo Hair Ltd. | Other services | 2022 |
| Revive Home Improvements Ltd | Construction | 2026 |
| Revlon Offshore Limited | | 2013 |
| Revoil Design Ltd | Professional & scientific | 2015 |
| Reymac Limited | Real estate | 2007 |
| Rfid Digital Ltd | Information & communication | 2023 |
| RFR Properties Limited | Real estate | 2024 |
| RG Pipework Limited | Professional & scientific | 2025 |
| Rgakp Ltd | Arts & recreation | 2025 |
| RGM Cranes UK Ltd | Wholesale & retail | 2022 |
| Rgour Services Ltd | Professional & scientific | 2026 |
| RH Commercial (SCO) Limited | Wholesale & retail | 2025 |
| RH Medical Ltd | Health & social care | 2020 |
| RHC Legal Limited | Professional & scientific | 2023 |
| Rhematech Ltd | Transport & logistics | 2020 |
| Rhlm Property Limited | Real estate | 2020 |
| Rhyl Management Co Ltd | Real estate | 2013 |
| Rhys Contracts Ltd | Construction | 2015 |
| Richland (Scotland) Limited | Transport & logistics | 1999 |
| Riddell Medical Limited | Professional & scientific | 2016 |
| Rihu Farooq Limited | Health & social care | 2016 |
| RIO Tinto Escondida Limited | | 1988 |
| RIO UK Developments Limited | Real estate | 2025 |
| Rise & Shine Cleaning Ltd | Administrative & support | 2023 |
| Rise Gym Glasgow Ltd | Arts & recreation | 2020 |
| Risecroft Ltd | Professional & scientific | 2017 |
| Rising Light Capital Limited | Financial services | 2026 |
| Rising Light Investments Limited | Financial services | 2025 |
| Ritchies Training Centre Limited | Other services | 2024 |
| Ritvik Petroleum Ltd | Wholesale & retail | 2024 |
| Rivals Martial Arts Limited | Other services | 2023 |
| River Wonders Ltd | Health & social care | 2019 |
| Riverside Technology Management Associates Ltd | Information & communication | 2014 |
| RJM Housing Limited | Real estate | 2026 |
| RJM Roofing (UK) Limited | Construction | 2014 |
| Rkmax Ltd | Administrative & support | 2019 |
| RKP Care Ltd | Health & social care | 2024 |
| RL Drinks Ltd | Administrative & support | 2024 |
| Rltl Holdings Ltd | Hospitality | 2023 |
| Rltl Provisions Ltd | Hospitality | 2025 |
| RLW Accountancy Ltd | Professional & scientific | 2023 |
| RM Electrical Solutions Limited | Construction | 2021 |
| RMB Roofing & Cladding Ltd | Construction | 2021 |
| Rmcl Contracts Limited | Construction | 2025 |
| Rmgc Limited | Construction | 2021 |
| RN Power Ltd | Construction | 2025 |
| Roan Ltd. | | 2023 |
| Robert Reid Management Ltd | Professional & scientific | 2019 |
| Robert Smith Logistics Ltd. | Other services | 2019 |
| Robert Wells Landscape Gardeners Limited | Professional & scientific | 2002 |
| Roberts O.B. Security Ltd | Administrative & support | 2025 |
| Robertson and Travers Transport Ltd | Transport & logistics | 2026 |
| Robertson Travel Ltd | Transport & logistics | 2026 |
| Robkat & Co Ltd | Transport & logistics | 2019 |
| ROC Leisure Ltd | Hospitality | 2021 |
| Rocca Ltd | Other services | 2016 |
| Rohan Estates Limited | Real estate | 2017 |
| Roivant Sciences Ltd. | | 2021 |
| Rokhu Investments Limited | Real estate | 2021 |
| ROL Group Ltd | Wholesale & retail | 2020 |
| Ronall Motors Ltd | Wholesale & retail | 2021 |
| Ronovations Ltd | Construction | 2020 |
| Ronzio Cafe Hamilton Ltd | Hospitality | 2026 |
| Roofteq Limited | Construction | 2009 |
| Rooney Family Law Limited | Professional & scientific | 2017 |
| Rors Tech Ltd | Wholesale & retail | 2026 |
| ROS & Paws Limited | Other services | 2012 |
| Rosanna 12 Limited | Hospitality | 2014 |
| Rose Associates International Limited | Professional & scientific | 2017 |
| Rose Financial Limited | Financial services | 2024 |
| Rose G Aesthetics Limited | Other services | 2025 |
| Rosebank (Dundee) Limited | Health & social care | 2017 |
| Roseberry Properties Ltd | Real estate | 2012 |
| Rosehazel Limited | Real estate | 1995 |
| ROSETULIP613 Limited | Wholesale & retail | 2025 |
| Roshnyah Ltd | Health & social care | 2023 |
| Rosie Moir SCO Limited | Arts & recreation | 2024 |
| Rosny House Limited | Health & social care | 2025 |
| Ross - Roofing & Roughcasting Ltd | Construction | 2023 |
| Ross Alexander Photography Limited | Professional & scientific | 2018 |
| Ross Clelland Ltd | Information & communication | 2021 |
| Ross Dunbar Warden Services Ltd | Administrative & support | 2014 |
| Ross Investments Ltd | | 2023 |
| Ross Irving Online Consultancy Limited | Health & social care | 2020 |
| Ross Prentice Ltd | Construction | 2026 |
| Rossex Services Limited | Construction | 2015 |
| Rota Joinery Ltd | Construction | 2018 |
| Rotherholme Dental Practice Ltd | Health & social care | 2019 |
| Roundhill Park Investments Limited | Real estate | 2016 |
| Route 66 Driving School Ltd | Education | 2025 |
| Route Mobile Inc. | | 2024 |