| Rhythm Wellness Club Ltd. | Information & communication | 2024 |
| RIA Michaela Ltd | Other services | 2022 |
| RIA Sales Corporation Ltd | Wholesale & retail | 2018 |
| Ribeiro Investment Ltd | Real estate | 2019 |
| Rich Technical Solutions Ltd | Information & communication | 2017 |
| Rich Umbrella Ltd | Professional & scientific | 2025 |
| Richard Booth Estate Agent Limited | Real estate | 2025 |
| Richard Cammish Studio Limited | Manufacturing | 2007 |
| Richard Clements Group Ltd | Agriculture & fishing | 2025 |
| Richard Dilley Ltd. | Professional & scientific | 2015 |
| Richard Invests Limited | Professional & scientific | 2025 |
| Richard Knows Best Limited | Administrative & support | 2025 |
| Richard's Taxi Ltd | Transport & logistics | 2026 |
| Richards&Co Property Limited | Real estate | 2022 |
| Richkel Limited | Hospitality | 2024 |
| Richmond Consulting and Technology Ltd | Information & communication | 2024 |
| Rickards Period Plastering Limited | Construction | 2013 |
| Ricky Corvel Ltd | Wholesale & retail | 2026 |
| Riddick Urology Services Ltd | Health & social care | 2013 |
| Ridgeway & Co Recruitment Limited | Administrative & support | 2024 |
| Ridley Godfrey (Holdings) Limited | Financial services | 2013 |
| Ridley Wood Management Limited | Households | 2006 |
| Riffel Road Limited | Extraterritorial | 1998 |
| Rift Valley Beverages Ltd | Manufacturing | 2024 |
| RIG Book Club Ltd | Other services | 2025 |
| Rigang Metal Supplies UK Ltd | Energy | 2026 |
| Riggey's Carpentry Ltd | Manufacturing | 2019 |
| Right by Nature Ltd | Construction | 2026 |
| Right Car Motor Group Ltd | Wholesale & retail | 2020 |
| Right FM Group Limited | Construction | 2024 |
| Righthear Ltd | Wholesale & retail | 2025 |
| Rightway Logistics and Services Ltd | Wholesale & retail | 2019 |
| Riible Limited | Wholesale & retail | 2021 |
| Rimax Real Estate Limited | Professional & scientific | 2019 |
| Ring Group Ltd | Information & communication | 2025 |
| Ringstyle Residents Association Limited | Households | 1982 |
| Ringtail Software Ltd. | Administrative & support | 2016 |
| Rinvest Ltd | Real estate | 2022 |
| Rios Precious Metals Ltd | Manufacturing | 2020 |
| Risby (School Road) Management Company Limited | Households | 2006 |
| Risbygate Framers Ltd | Wholesale & retail | 2020 |
| Risbygate Sports Bar Ltd | Hospitality | 2024 |
| Rise & Thrive Properties Ltd | Real estate | 2025 |
| Rise Consul Limited | Real estate | 2021 |
| Rise With US Consultancy Ltd | Professional & scientific | 2022 |
| Risewell Together CIC | Education | 2025 |
| Risho Stays Ltd | Real estate | 2023 |
| Risk Free Pregnancy Ltd | Information & communication | 2021 |
| Riskaway Safety Consultancy Ltd | Administrative & support | 2025 |
| Risksec Ltd | Construction | 2025 |
| Rita J Rose Ltd | Information & communication | 2025 |
| Rita Restaurant Ltd | Hospitality | 2025 |
| Rivendell International Limited | Extraterritorial | 1921 |
| River Lark Abstractors Limited | Agriculture & fishing | 2022 |
| Riverfront Hotels Ltd | Hospitality | 2025 |
| Riverlite Ltd | Information & communication | 2008 |
| Riverside Assets Limited | Professional & scientific | 2016 |
| Riverside Bar Ltd | Hospitality | 2025 |
| Riverside Court Management (BSE) Limited | Households | 1992 |
| Riverside Marquee Events Ltd | Arts & recreation | 2025 |
| Riverside Property West Moors Limited | Other services | 2001 |
| Riverton Group Ltd | Transport & logistics | 2022 |
| Rivoro Studio Ltd | Professional & scientific | 2026 |
| Rivus Limited | Education | 1999 |
| Rizqy Business Ltd | Professional & scientific | 2026 |
| Rizwan Publication Ltd | Information & communication | 2025 |
| Rizza Holdings Ltd | Financial services | 2016 |
| Rizza Limited | Real estate | 2014 |
| RJ Family Homes Limited | Real estate | 2022 |
| RJ Navagruha Limited | Real estate | 2023 |
| Rjfp Resourcing Limited | Agriculture & fishing | 2009 |
| Rjjones Consulting Ltd | Professional & scientific | 2025 |
| RJK Carpentry Ltd | Construction | 2022 |
| RJO Evans Group Ltd | Construction | 2026 |
| RJP Commercial Services Ltd | Administrative & support | 2025 |
| RJZ Art Ltd | Education | 2026 |
| RK Renovations Ltd | Construction | 2023 |
| RK Sports Coaching Ltd | Education | 2025 |
| RKA Property Ltd | Extraterritorial | 2022 |
| Rkcm Consulting Limited | Professional & scientific | 2014 |
| Rklf Servecing Ltd | Wholesale & retail | 2026 |
| RKM Composites Ltd | Manufacturing | 2019 |
| RKT Data Consultants Ltd | Administrative & support | 2025 |
| Rktxo Ltd | Wholesale & retail | 2024 |
| RL Psychology Limited | Health & social care | 2023 |
| Rlfg Investments Ltd | Financial services | 2025 |
| RLT Transport Essex Ltd | Transport & logistics | 2025 |
| RMC Law Ltd | Professional & scientific | 2026 |
| Rmc&L Ltd | Real estate | 2026 |
| Rmcg QS & Commercial Services Ltd | Professional & scientific | 2019 |
| Rmds Group Ltd | Financial services | 2024 |
| RMS Training Ltd | Professional & scientific | 2007 |
| Rmsyn Group Deals Ltd | Wholesale & retail | 2025 |
| Rmteam International Limited | Professional & scientific | 2019 |
| RMW Development Solutions Ltd | Administrative & support | 2023 |
| RN Project Management Ltd | Other services | 2025 |
| RN Properties Ltd | Construction | 2025 |
| RNA Fibre Ltd | Construction | 2024 |
| RO Services Limited | Transport & logistics | 2015 |
| Roach Davitt Ltd | Other services | 2022 |