| RTP Nutrition Limited | Health & social care | 2023 |
| Rtrvit Limited | Transport & logistics | 2021 |
| RTX Logos Limited | Manufacturing | 2024 |
| RU Enterprises Ltd | Wholesale & retail | 2025 |
| Rubek Medical Limited | Health & social care | 2024 |
| Rubicon Employee Ownership Trustee Limited | Professional & scientific | 2021 |
| Rubio Lifestyle Limited | Wholesale & retail | 2021 |
| Rubus Properties Ltd | Real estate | 2024 |
| Ruby Property Rentals (Southern) Ltd | Real estate | 2018 |
| Ruby Stow Limited | Professional & scientific | 2021 |
| Rudds of London Limited | Hospitality | 2023 |
| Rudi Savanna Aesthetics and Education Ltd | Other services | 2025 |
| RUE Gear Ltd | Wholesale & retail | 2025 |
| Rufat Garibov Limited | Wholesale & retail | 2022 |
| Rufus & Associates Limited | Administrative & support | 2015 |
| Rufus & George Private Office Limited | Professional & scientific | 2018 |
| Rufus George & Associates Limited | Administrative & support | 2017 |
| Rugged Data Limited | Information & communication | 2014 |
| Rugo Investments Limited | Real estate | 2024 |
| Rule of 40 Ltd | Professional & scientific | 2025 |
| Rumigor Limited | Transport & logistics | 2024 |
| Runfar Limited | Professional & scientific | 2019 |
| Runfly Ltd | Wholesale & retail | 2022 |
| Running Free (Poole) Limited | Wholesale & retail | 2025 |
| Running on Grooms Ltd | Other services | 2024 |
| Runway Growth Consulting Ltd | Professional & scientific | 2023 |
| Runway Growth Marketing Ltd | Professional & scientific | 2025 |
| Rupin Rach Limited | Professional & scientific | 2020 |
| Ruqaiya AL Ghafri Limited | Wholesale & retail | 2025 |
| Ruqaya Altarshi Limited | Wholesale & retail | 2025 |
| Rural Retreat Rentals Limited | Real estate | 2025 |
| Rusbydigital Ltd | Information & communication | 2024 |
| Rushay Developments Limited | Real estate | 2005 |
| Russell Freeholds Ltd | Hospitality | 2015 |
| Russell Mount Management Company Limited | Households | 1983 |
| Russell Restaurants Bournemouth Limited | Hospitality | 2017 |
| Russettings Care Investments Ltd | Professional & scientific | 2026 |
| Russettings Care Limited | Health & social care | 2013 |
| Russettings Care Services Ltd | Health & social care | 2023 |
| Rustica BR Ltd | Wholesale & retail | 2025 |
| Rustica Ultra Ltd | Wholesale & retail | 2025 |
| Ruth Developments Ltd | Real estate | 2022 |
| Ruth Jackson Limited | Wholesale & retail | 2012 |
| Rutim Ltd | Construction | 2011 |
| Rvcj Limited | Information & communication | 2010 |
| RVM Management Company Limited | Professional & scientific | 2006 |
| RVM Portfolio Limited | Real estate | 2023 |
| Rvmb Ltd | Manufacturing | 2021 |
| RVT Bidco Limited | Financial services | 2025 |
| RVT Midco Limited | Financial services | 2025 |
| RVT Opco Limited | Wholesale & retail | 2025 |
| RVT Topco Limited | Financial services | 2025 |
| RW Roofing & Maintenance Limited | Construction | 2023 |
| RWJ Financial Services Ltd | Financial services | 2011 |
| RY & SA Investments Ltd | Real estate | 2025 |
| Ryan Bartlett Limited | Transport & logistics | 2017 |
| Rydal House Freehold Limited | Households | 1998 |
| Ryder Property Limited | Real estate | 2025 |
| RYM Marine Services Ltd | Manufacturing | 2025 |
| Rynaco Consultants Limited | Construction | 2020 |
| Rynox Limited | Education | 2026 |
| RYW Solutions Limited | Professional & scientific | 2014 |
| Röwer & RÜB (UK) Ltd | Construction | 2019 |
| S & a Utilities Ltd | Construction | 2019 |
| S & J Palmer Ltd | Financial services | 2014 |
| S & W Solutions Limited | Manufacturing | 2021 |
| S and K Management Limited | Arts & recreation | 2019 |
| S B Barber Ltd | Other services | 2018 |
| S Bradley Solutions Ltd | Financial services | 2014 |
| S C L Leisure Ltd | Arts & recreation | 2019 |
| S Cooke Limited | Professional & scientific | 2017 |
| S Draper Tree Specialists Ltd | Agriculture & fishing | 2021 |
| S G Auto Care Ltd | Wholesale & retail | 2018 |
| S G Care Homes Limited | Administrative & support | 2013 |
| S Hansford Limited | Construction | 2008 |
| S Harding Electrical Ltd | Construction | 2016 |
| S J M Surveying Limited | Professional & scientific | 2010 |
| S J Nethercott Limited | Construction | 2015 |
| S Jeffery Marine Ltd | Manufacturing | 2022 |
| S L Dawes Cleaners Limited | Administrative & support | 2013 |
| S MYC Ltd | Hospitality | 2019 |
| S P Redrupp Limited | Professional & scientific | 2009 |
| S S Plumbing Ltd | Water & waste | 2017 |
| S Sanders Consulting Limited | Professional & scientific | 2025 |
| S&C Multitrades Ltd | Construction | 2025 |
| S&J Thread Repair Ltd | Wholesale & retail | 2020 |
| S&K Building Limited | Wholesale & retail | 2001 |
| S-Tek Limited | Information & communication | 1998 |
| S.A M. Global Ltd | Health & social care | 2018 |
| S.A. Dorset Rentals Limited | Real estate | 2025 |
| S.A.F.I. Ltd | Manufacturing | 1973 |
| S.E. Connell & Sons Limited | Construction | 1988 |
| S.F.E.C Construction Ltd | Construction | 2025 |
| S.I.A. Tiling and Stonework Ltd | Construction | 2024 |
| S.J.Stanborough Homes Ltd | Construction | 2000 |
| S.M.A.R.T Training & Leadership Limited | Education | 2016 |
| S.Marie Creative Ltd | Information & communication | 2025 |
| S.O.A.P. Community Arts CIC | Arts & recreation | 2026 |
| S.R. France Contractors Limited | Construction | 1997 |
| S.Z.M.A.T.A. Special Zone Main Automatic Transport Alternative Limited | Transport & logistics | 2021 |