| Roxburghe Group Limited | Professional & scientific | 2013 |
| Roxburghe Holdings Limited | Construction | 2019 |
| Roxburghe Homes Limited | Construction | 2019 |
| Roxburghe Private Wealth Management Limited | Extraterritorial | 2015 |
| Roxburghe Ventures Limited | Real estate | 2013 |
| Rozel Media Ltd | Extraterritorial | 2021 |
| Rozel Property Ltd | Real estate | 2026 |
| RP Car Sales Limited | Wholesale & retail | 2022 |
| RP Exclusives Limited | Wholesale & retail | 2019 |
| Rpas Constructions Ltd | Construction | 2023 |
| RPR Holdings and Investments Ltd | Financial services | 2020 |
| RPS Group (WV1 Properties) Ltd | Real estate | 2018 |
| RS Carpentry & Joinery Ltd | Construction | 2024 |
| RS Detailing and Valeting Limited | Administrative & support | 2025 |
| RS Oils Ltd | Extraterritorial | 2015 |
| RSB Optical Services Limited | Wholesale & retail | 2023 |
| Rskas Ltd | Real estate | 2025 |
| RSN Trading Ltd | Wholesale & retail | 2013 |
| Rsnm Rawat Ltd | Transport & logistics | 2023 |
| RT Holdings and Investments Ltd | Financial services | 2024 |
| RT UK Services Ltd | Other services | 2024 |
| RTC Housing Services Ltd | Real estate | 2020 |
| RTC Supported Housing CIC | Real estate | 2020 |
| Rtuck UK Ltd | Information & communication | 2016 |
| Rubberrevival Ltd | Manufacturing | 2026 |
| Ruby Accountancy Ltd | Other services | 2021 |
| Ruby Blossom Limited | Health & social care | 2018 |
| Rudh Limited | Hospitality | 2014 |
| Rudh Properties Ltd | Real estate | 2022 |
| Rugby Plastics Limited | Manufacturing | 2012 |
| Rumi Management Limited | Administrative & support | 2022 |
| Running Freek Ltd | Wholesale & retail | 2024 |
| Running Plumbing Ltd | Construction | 2025 |
| RUNWAY25 Ltd | Extraterritorial | 2019 |
| Ruserv Ltd | Administrative & support | 2018 |
| Rush Jobs Limited | Administrative & support | 2005 |
| Rushby Commercial Property Investments Limited | Real estate | 2024 |
| Rushby Developments Ltd | Construction | 2019 |
| Rushby Holdings and Investments Ltd | Financial services | 2017 |
| Rushby's Limited | Construction | 2007 |
| Russell Court Care Home Ltd | Health & social care | 2018 |
| Russell Court U.K. Ltd | Health & social care | 2017 |
| Russells Hall Drink Shop Ltd | Wholesale & retail | 2026 |
| Rutki Trans Ltd | Transport & logistics | 2018 |
| RWM (2014) Limited | Construction | 2014 |
| Rybridge Associates Limited | Professional & scientific | 2000 |
| Rybridge Consultants Limited | Administrative & support | 1975 |
| S & a Groundworks & Construction Ltd | Construction | 2023 |
| S & AB Automotive Ltd | Wholesale & retail | 2025 |
| S & B Pubs Ltd | Hospitality | 2025 |
| S & J Builders Limited | Construction | 2017 |
| S & L Quality Services Limited | Professional & scientific | 2015 |
| S & M Daniels Holdings Limited | Real estate | 2015 |
| S & P Plant Limited | Administrative & support | 2018 |
| S & R Dupree Ltd | Administrative & support | 2021 |
| S & S Bakery Ltd | Wholesale & retail | 2025 |
| S & S Property Holdings Limited | Real estate | 2017 |
| S and B Health Ltd | Wholesale & retail | 2019 |
| S and B Property Ventures Limited | Real estate | 2020 |
| S Blakeney Limited | Other services | 2013 |
| S C Building Ltd | Construction | 2022 |
| S Copper Holdings Limited | Construction | 2016 |
| S Dodd Programming Services Ltd | Construction | 2023 |
| S E J Support Limited | Other services | 2015 |
| S Galvin Consultancy Limited | Professional & scientific | 2016 |
| S J & K L Kennedy Limited | Administrative & support | 2015 |
| S J Cooper Electrical Limited | Construction | 2011 |
| S J GAS & Plumbing Solutions Ltd | Energy | 2025 |
| S J Richards Limited | Construction | 1987 |
| S Johns Carpentry and Building Ltd | Construction | 2025 |
| S M a Heating & Plumbing Solutions Ltd | Other services | 2020 |
| S N Bryan Consulting Limited | Financial services | 2018 |
| S Nama Limited | Administrative & support | 2022 |
| S R Roofing Services (Abersoch) Ltd | Construction | 2018 |
| S Sedgley Turkish Barber Ltd | Other services | 2026 |
| S T Johnmore Investments Limited | Financial services | 2018 |
| S T Lifting Holdings Limited | Professional & scientific | 2004 |
| S T Lifting Limited | Manufacturing | 2003 |
| S&A Groundworks & Landscaping Ltd | Construction | 2026 |
| S&A Holdings & Investments Ltd | Financial services | 2026 |
| S+S Properties Limited | Real estate | 2004 |
| S. Builders (PVT) Limited | Construction | 2017 |
| S. Easton & Sons Limited | Administrative & support | 2016 |
| S.& W.Glazed Tile Company Limited | Water & waste | 1956 |
| S.B. Plumbing & Heating Ltd | Construction | 2022 |
| S.Bowen Services Limited | Construction | 2008 |
| S.E.P. Response Limited | Real estate | 2000 |
| S.F Upvc Fitters Limited | Construction | 2013 |
| S.F.B Consultancy Water Management Ltd | Professional & scientific | 2022 |
| S.G. Foods (Dudley) Ltd | Hospitality | 2025 |
| S.H.Britton Engineering Ltd. | Professional & scientific | 2016 |
| S.Learning Ltd | Professional & scientific | 2024 |
| S.Parsons (Cradley Heath) Limited | Real estate | 1955 |
| S.R.M. Fasteners Limited | Wholesale & retail | 2012 |
| S.T Garrish Carpentry Ltd | Construction | 2023 |
| S.T Removals Limited | Transport & logistics | 2026 |
| S.T.S Surfacing Limited | Construction | 2020 |
| S.W Services [WM] Limited | Wholesale & retail | 2004 |
| S5 Properties Limited | Real estate | 2026 |
| SA Direct Motors Limited | Wholesale & retail | 2024 |