| Rigel International LP | | 2016 |
| Riggedout Ltd | Real estate | 2025 |
| Righ Properties Limited | Hospitality | 2023 |
| Right Choice Renovations Ltd | Construction | 2018 |
| Right Choice Supplements Ltd | Wholesale & retail | 2021 |
| Right Concept LP | | 2016 |
| Right Footings Limited | Real estate | 2020 |
| Right Services L.P. | | 2013 |
| Right Solutions Corporation L.P. | | 2012 |
| Right Turn Driving School Ltd | Education | 2025 |
| Rightline Sales L.P. | | 2012 |
| Righton Import L.P. | | 2015 |
| Rights Advice Scotland | Administrative & support | 2002 |
| Rightson Nordic L.P. | | 2014 |
| Rightways Tramac and Paving Services Limited | Construction | 2025 |
| Rigpa Ltd | Professional & scientific | 2020 |
| Riha Holding Limited | Real estate | 2022 |
| RIK Systems Limited | Other services | 2023 |
| Rikestone Impex LP | | 2014 |
| Rikki Music Shop Ltd | Wholesale & retail | 2012 |
| Riko Consult LP | | 2017 |
| Rikson Capital LP | | 2012 |
| Rikson Company LP | | 2014 |
| Rilana Home Ltd | Wholesale & retail | 2025 |
| Riley & Moore LP | | 2014 |
| Riley Solutions Ltd | Professional & scientific | 2024 |
| Rillbank Development LLP | | 2020 |
| Rillingtone Sales LP | | 2012 |
| RIM Residentials Limited | Real estate | 2024 |
| RIM Services Limited | Construction | 2025 |
| Rimella United LP | | 2021 |
| Rinatrade Project LP | | 2013 |
| Ring Courier Ltd | Transport & logistics | 2025 |
| Ring of Software Engineers UK Ltd | Information & communication | 2007 |
| Ringcliff SP | | 2002 |
| Ringmile Alliance L.P. | | 2015 |
| Ringstead SLP | | 1997 |
| Ringsted Processing LP | | 2013 |
| Rini Travel and Tour Limited | Administrative & support | 2023 |
| Rinky Dink Enterprises Ltd | Information & communication | 2023 |
| Rinn Therapeutics Limited | Professional & scientific | 2024 |
| Rinzler Labs Limited | Information & communication | 2023 |
| RIO Brasil Group LP | | 2016 |
| RIO Corporation L.P. | | 2012 |
| RIO CP LP | | 2015 |
| RIO DE LA Plata LP | | 2011 |
| RIO Escondido SP | | 2004 |
| RIO Guiado LP | | 2016 |
| RIO International Investments Limited | Financial services | 2017 |
| RIO Investments LP | | 2014 |
| RIO Precious Metals Ltd | Financial services | 2018 |
| RIO Property Ltd | Real estate | 2013 |
| RIO SOL Ltd | Hospitality | 2023 |
| RIO TLP Ltd | Administrative & support | 2017 |
| Rioch and Robertson Armadale Limited | Health & social care | 2025 |
| Rioch and Robertson Bathgate Limited | Health & social care | 2025 |
| Rioch and Robertson Limited | Education | 2017 |
| Riome Consulting Limited | Information & communication | 2013 |
| Riome Studio Ltd | Professional & scientific | 2025 |
| Riore Impex LP | | 2017 |
| Rios Edinburgh 1 Ltd | Hospitality | 2025 |
| Riotech Services LP | | 2015 |
| Ripao Investments SP | | 2002 |
| Ripara Ltd | Construction | 2012 |
| Ripio Europe LP | | 2015 |
| Ripon Commerce LP | | 2015 |
| Ripple Arts Ltd. | Arts & recreation | 2013 |
| Ripple Dental Limited | Health & social care | 2023 |
| Ripple Medical Assessment Ltd | Health & social care | 2018 |
| Rippowam Partners | | 1998 |
| Riptide Engineering Ltd | Professional & scientific | 2026 |
| RIR Limited | Financial services | 2013 |
| Risalton Trading LP | | 2013 |
| Rise Access & Scaffolding Solutions Limited | Construction | 2024 |
| Rise and Shine International LP | | 2022 |
| Rise and Thrive International Limited | Other services | 2024 |
| Rise Nutrition, UK Limited | Administrative & support | 2020 |
| Rise Property Investment Limited | Real estate | 2017 |
| Rise Property Resi Ltd | Real estate | 2019 |
| Riserflow Utilities Ltd | Manufacturing | 2026 |
| Rishera Ethnosart Ltd | Wholesale & retail | 2024 |
| Rishi Transport International Limited | Administrative & support | 2025 |
| Rising Sparrow SP | | 2003 |
| Rising Star Consultancy Ltd | Real estate | 2019 |
| Rising Sun Cuisine Ltd | Hospitality | 2023 |
| Rising Tide Cafe Limited | Hospitality | 2020 |
| Rising Trade Port LP | | 2017 |
| Risk Assessment Service Ltd | Financial services | 2022 |
| Risk Asset Consulting Ltd | Professional & scientific | 2011 |
| Risk Guard Limited | Public administration | 2025 |
| Riskpoint Ltd | Information & communication | 2026 |
| Ristna Risk Management & Consultancy LP | | 2014 |
| Ristorazione Esterna Ltd | Hospitality | 2022 |
| Riswell Resources L.P. | | 2013 |
| RIT Carry LP | | 2012 |
| RIT Interior Design Ltd | Construction | 2020 |
| RIT Investments GP Limited | Administrative & support | 2012 |
| RIT Investments LP | | 2012 |
| Ritchie & Goodwin Limited | Construction | 2002 |
| Ritchie & Macintosh Ltd | Construction | 2023 |