| RJL Holdings (North) Ltd | Financial services | 2024 |
| RJL Interiors Ltd | Construction | 2024 |
| RJP Farriery Ltd | Professional & scientific | 2003 |
| RJP Investments Ltd | Financial services | 2023 |
| RJT Installations Ltd | Construction | 2025 |
| RK Garden Furniture Ltd | Manufacturing | 2025 |
| RKS Care Limited | Health & social care | 2013 |
| RLS Investments Limited | Professional & scientific | 2013 |
| RM Auto Solutions Limited | Wholesale & retail | 2025 |
| Rmss Clinical Limited | Health & social care | 2025 |
| Rmtbs Limited | Arts & recreation | 1999 |
| RMW & SON Ltd | Construction | 2018 |
| RND Property Partners Ltd | Real estate | 2025 |
| RNR Homes Ltd | Real estate | 2021 |
| Rob's Auto Repairs (Rednal) Limited | Wholesale & retail | 2025 |
| Robert DE Grafton Limited | Professional & scientific | 2025 |
| Robert Pryde Associates Limited | Wholesale & retail | 2011 |
| Roberts and Daughter Ltd | Real estate | 2025 |
| Roberts Mason & Templar Ltd | Professional & scientific | 2019 |
| Robin Hill Farm Limited | Households | 2015 |
| Robin Hill View Limited | Households | 2017 |
| Robin Redbreast Limited | Arts & recreation | 2021 |
| Robinson Brothers Transport Limited | Transport & logistics | 2022 |
| Robinson Transport Ltd | Transport & logistics | 2025 |
| Robinsonwade Ltd | Information & communication | 2025 |
| Robusto Films Limited | Information & communication | 2014 |
| ROC Property Investments Ltd | Real estate | 2007 |
| Rocafina Ltd | Manufacturing | 2026 |
| Rochford Machine Tool Services Ltd | Professional & scientific | 2019 |
| Rock Farm Pensax LLP | | 2016 |
| Rock Hill Management Company Limited | Households | 2004 |
| Rocup UK Trading Limited | Wholesale & retail | 2024 |
| ROE Wellness Ltd | Health & social care | 2025 |
| Roebuck Controls & Automation Limited | Manufacturing | 2026 |
| Rogue Element Holdings Limited | Financial services | 2013 |
| Rogue Pioneer Ltd | Information & communication | 2023 |
| Rohxn Ltd | Administrative & support | 2025 |
| Roman Doors Holdings Ltd | Financial services | 2025 |
| Roman Doors Ltd | Construction | 2023 |
| Romsley Hill Grange Co Limited | Households | 2017 |
| RON Smith (Properties) Ltd | Real estate | 2015 |
| Roof Rangers Ltd | Construction | 2026 |
| Rookwoods Farm Limited | Agriculture & fishing | 2024 |
| Roome Associates Limited | Professional & scientific | 2007 |
| Roommatch Ltd | Real estate | 2021 |
| Roommatch Solutions Limited | Information & communication | 2022 |
| Ropeworld Ltd | Wholesale & retail | 2018 |
| Rora Store Limited | Wholesale & retail | 2024 |
| Rose House Kefalos Limited | Hospitality | 2021 |
| Roseberry Specialist Care Centres Limited | Health & social care | 2009 |
| Rosedale Fencing Ltd | Administrative & support | 2025 |
| Rosemont Capital One Limited | Real estate | 2017 |
| Rosmetics Aesthetics Limited | Wholesale & retail | 2014 |
| Rossy Diva Hair Limited | Other services | 2026 |
| Rotana Ltd | Wholesale & retail | 2025 |
| Rotaring Ltd | Manufacturing | 2024 |
| Roubaix Group Limited | Real estate | 2019 |
| Rowland Construction and Refurbishments Ltd | Construction | 2013 |
| Rowlands Walker LLP | | 2007 |
| Rowley Care Ltd | Health & social care | 2017 |
| Royale Property Services Ltd | Real estate | 2023 |
| Roylan Construction Limited | | 1980 |
| Royston Ffrench Racing Limited | Arts & recreation | 2009 |
| RPT Consultancy Services Limited | Professional & scientific | 2016 |
| Rrsg Ltd | Arts & recreation | 2018 |
| RSB RN Limited | Administrative & support | 2021 |
| RSJ Holdings Ltd | Professional & scientific | 2019 |
| RSS Electrical Services Limited | Energy | 2013 |
| RSS Holdings (Worcestershire) Limited | Financial services | 2022 |
| Rsvp Healthtech Consulting Ltd | Professional & scientific | 2025 |
| Rubery Healthcare Limited | Wholesale & retail | 2024 |
| Rubicon Rentals Ltd | Real estate | 2025 |
| Ruby Aircraft Support Ltd | Wholesale & retail | 2023 |
| Ruby Aviation Ltd | Wholesale & retail | 2018 |
| Ruby Global Business Ltd | Wholesale & retail | 2024 |
| Rudd Properties Ltd | Construction | 2019 |
| RUM Rover Ltd | Wholesale & retail | 2023 |
| Runa Services Ltd | Transport & logistics | 2021 |
| Running Free Design Limited | Manufacturing | 2011 |
| Rural Timber Window Company Ltd | Manufacturing | 2011 |
| Russell KAR Holdings Ltd | Financial services | 2025 |
| Russell Tovey Ltd | Arts & recreation | 2009 |
| Russon Contracts Ltd | Transport & logistics | 2026 |
| Ruta Limited | Hospitality | 2016 |
| Rutherford Rail Operational Solutions Limited | Professional & scientific | 2014 |
| Rutrell Investments Ltd | Real estate | 2021 |
| RV Corporate Ltd | Professional & scientific | 2020 |
| Rvlv UK Limited | Wholesale & retail | 2017 |
| RWX Holdings Ltd | Financial services | 2021 |
| Rydal Enterprises Limited | Real estate | 2000 |
| Ryknild Drive RTM Company Limited | Households | 2022 |
| Ryknild RTM Company Ltd | Households | 2013 |
| Ryland Property Investments Limited | Real estate | 2020 |
| S & a Mares Ltd | Real estate | 2014 |
| S & B Houses Ltd | Real estate | 2021 |
| S & K Wills Limited | Real estate | 2021 |
| S & L Richardson Ltd | Health & social care | 2018 |
| S & M Holdings Limited | Real estate | 2008 |
| S a Business Park Ltd | Wholesale & retail | 2025 |
| S and H Schoolwear and Sports Limited | Wholesale & retail | 2019 |