| RJD Corporate Ltd | Professional & scientific | 2015 |
| RJS Legal Limited | Professional & scientific | 2012 |
| RJS Surveying Ltd | Construction | 2023 |
| RKC Food & Wine Ltd | Wholesale & retail | 2022 |
| Rmccormack Ltd | Professional & scientific | 2024 |
| RNG Enterprise Ltd | Wholesale & retail | 2022 |
| Roar and Bellow Limited | Administrative & support | 2016 |
| Robert Kulesza Limited | Health & social care | 2002 |
| Robert Munro Ltd | Professional & scientific | 2019 |
| Robert YEO Limited | Professional & scientific | 2018 |
| Robotios Limited | Professional & scientific | 2024 |
| Rock & Fairy Limited | Other services | 2009 |
| Rock Restaurant Ltd | Hospitality | 2022 |
| Rockall Group Ltd | Other services | 2024 |
| Rockford Film Lighting Ltd | Administrative & support | 2015 |
| Rockmines Coffee Limited | Manufacturing | 2020 |
| Rogers Prestige Properties Limited | Real estate | 2020 |
| Romalo Film & Creative Ltd | Information & communication | 2025 |
| Rondavel Limited | Real estate | 2024 |
| Rooks Fine Kentish Foods Limited | Wholesale & retail | 2023 |
| Room 307 Limited | Professional & scientific | 2014 |
| Roomers Limited | Real estate | 2019 |
| Roost Studio Limited | Professional & scientific | 2010 |
| Root Canal Referral Centre Limited | Health & social care | 2017 |
| Roots Gardens Limited | Administrative & support | 2011 |
| ROS and Salim Property Ltd | Real estate | 2023 |
| Rosa Construction Limited | Construction | 2015 |
| Rosaloma Limited | Professional & scientific | 2020 |
| Rosary Rascals Limited | Education | 2016 |
| Rose Cottage Sustead Limited | Real estate | 2020 |
| Rosebrock Management and Origination Services Limited | Professional & scientific | 2016 |
| Rosebrock Property Holdings Limited | Real estate | 2021 |
| Roseheath Consultants Limited | Professional & scientific | 2024 |
| Roses & Pearls Events Ltd | Hospitality | 2022 |
| Rosevale Trading Limited | Hospitality | 2018 |
| Rosie Chai Limited | Hospitality | 2021 |
| Rosine Suire Ltd | Professional & scientific | 2021 |
| Roso Borosso Ltd | Wholesale & retail | 2024 |
| Ross Bateson Limited | Information & communication | 2012 |
| Rosslan Limited | Real estate | 1994 |
| Rosslyn Nursery and Preschool LLP | | 2017 |
| Rostra Consulting Limited | Professional & scientific | 2013 |
| Rotham Ltd | Financial services | 2025 |
| Roundaboutski Limited | Information & communication | 2004 |
| Rousseau Enterprises Limited | Information & communication | 2025 |
| Rowdy Sound Ltd | Arts & recreation | 2018 |
| ROX Q Limited | Arts & recreation | 2025 |
| Roxby Investments Limited | Real estate | 2014 |
| Roymount Court Residents Association Limited | Households | 1994 |
| RPJ Enterprises Ltd | Professional & scientific | 2023 |
| RR & RM Limited | Wholesale & retail | 2013 |
| RR & RM Properties Limited | Real estate | 2024 |
| RRC Acupucture Ltd | Other services | 2016 |
| RRG Asset Management Ltd | Financial services | 2018 |
| RRR Private Ltd | Wholesale & retail | 2026 |
| RS Force Ltd | Information & communication | 2006 |
| RS1 Building Co Ltd | Construction | 2023 |
| RSB & Sons Ltd | Other services | 2013 |
| RSJ Consulting Limited | Information & communication | 2014 |
| Rsjr Investments Limited | Real estate | 2018 |
| RSK Business Park Limited | Real estate | 2024 |
| RT Marketing Limited | Professional & scientific | 1996 |
| Rtfd Design Limited | Professional & scientific | 2024 |
| Rthomas Books Limited | Wholesale & retail | 2020 |
| RTK Direct Ltd | Real estate | 2020 |
| Ruark Consulting Ltd | Professional & scientific | 2023 |
| Ruben Property Services Ltd | Real estate | 2016 |
| Rubi Rocks Ltd | Hospitality | 2023 |
| Rubicon International Funerals Limited | Other services | 2024 |
| Rugby Care Limited | Health & social care | 2003 |
| Rugby Football Development Limited | Arts & recreation | 2005 |
| Rugby Football Foundation | Arts & recreation | 2002 |
| Rugby Love Ltd | Hospitality | 2024 |
| Rugby Reflink Limited | Information & communication | 2000 |
| Rumhoney Limited | Hospitality | 2024 |
| Run the Solstice Ltd | Arts & recreation | 2025 |
| Runi's Cake N Bake Limited | Hospitality | 2026 |
| Runnat Accounting Ltd | Professional & scientific | 2021 |
| Ruth Rowan Marketing Ltd | Extraterritorial | 2021 |
| Rutland Court (Twickenham) Residents Association Limited | Households | 1962 |
| Ruyi Developments Ltd | Financial services | 2020 |
| RV Architecture Ltd | Professional & scientific | 2017 |
| RVB Consultants Ltd | Professional & scientific | 2025 |
| RW Interior & General Refurbishment Ltd | Construction | 2024 |
| Rwcwhitton Limited | Wholesale & retail | 2015 |
| RWP Holdings Ltd | Construction | 2020 |
| Ryder Accounting Services Limited | Professional & scientific | 2018 |
| Ryder Management Limited | Other services | 2014 |
| Ryder Tax Consultants Limited | Professional & scientific | 2015 |
| Ryley & Right Limited | Information & communication | 2019 |
| RZ Legacy Limited | Real estate | 2022 |
| S & Alim Builders Limited | Construction | 2017 |
| S & M Landscapes Ltd | Administrative & support | 2026 |
| S & R Storrs Limited | Real estate | 2021 |
| S J Accounts Limited | Professional & scientific | 2009 |
| S K Labour Ltd | Administrative & support | 2018 |
| S Saini Optical Limited | Health & social care | 2025 |
| S&A Resourcing Ltd | Administrative & support | 2021 |
| S&M Glow Limited | Information & communication | 2024 |
| S&M Property Investments Limited | Real estate | 2018 |