| Rtype Consulting Ltd | Information & communication | 2023 |
| RTZ Ltd | Financial services | 2024 |
| RU4 Real Estate Ltd | Real estate | 2018 |
| Rubbish Capital Ltd | Water & waste | 2019 |
| Ruby Nails 128 Ltd | Other services | 2024 |
| Ruby Nails NL Ltd | Other services | 2026 |
| Ruby Technical Services Ltd | Extraterritorial | 2025 |
| Rubyduke Communications Limited | Professional & scientific | 2017 |
| Rudra SAI Estates Ltd | Real estate | 2020 |
| Rufton Property Services Ltd | Construction | 2012 |
| Rugby Invest Ltd | Real estate | 2025 |
| RUH Abaya London Limited | Wholesale & retail | 2022 |
| Ruhtex Ltd | Construction | 2025 |
| Rule Ltd | Administrative & support | 2016 |
| RUMIN8 Ltd | Education | 2023 |
| Run BNC Limited | Other services | 2016 |
| Run of Show Transport Limited | Transport & logistics | 2025 |
| Rune Consultancy Ltd | Information & communication | 2020 |
| Running Tribe Ltd | Arts & recreation | 2020 |
| Ruptura Infosecurity Limited | Information & communication | 2018 |
| RUQ Associates Ltd | Professional & scientific | 2018 |
| RUR3 Environmental Limited | Professional & scientific | 2007 |
| Rush Electrics Limited | Construction | 2014 |
| Rushhill Limited | Professional & scientific | 2007 |
| Russo Fashion Ltd | Wholesale & retail | 2025 |
| Russo Retail Limited | Wholesale & retail | 2026 |
| Rustlings Gate Management Limited | Professional & scientific | 1992 |
| Ruth & Alison Limited | Professional & scientific | 2025 |
| Ruths Hair and Beauty Limited | Other services | 2016 |
| Rutland Gate Consulting Services Ltd | Professional & scientific | 2025 |
| RV and Daughters Limited | Wholesale & retail | 2021 |
| RV Optical Ltd | Health & social care | 2025 |
| RW Anderson Consultants Ltd | Professional & scientific | 2026 |
| RWA Rigging Services Ltd | Construction | 2025 |
| RWJ Mechanical Limited | Professional & scientific | 2016 |
| Rwsuk Limited | Wholesale & retail | 2024 |
| Rxproperty Ltd | Real estate | 2018 |
| Rxsocial Ltd | Information & communication | 2016 |
| RY 7 Limited | Real estate | 2020 |
| Ryan's Garden Services Limited | Administrative & support | 2016 |
| Rydal Electrical Services Ltd | Construction | 2016 |
| RYE Care Limited | Health & social care | 2013 |
| RYE Stores Limited | Wholesale & retail | 2022 |
| Ryemead Commercial Group Ltd | Administrative & support | 2013 |
| Ryeview Homes Ltd | Real estate | 2012 |
| RYH Automart Ltd | Wholesale & retail | 2024 |
| Ryland Technology Limited | Information & communication | 1990 |
| Rymara Care Ltd | Health & social care | 2021 |
| Rymm Consultancy Ltd | Professional & scientific | 2023 |
| Rype Office Ltd | Wholesale & retail | 2015 |
| RZJ Investments Limited | Households | 2021 |
| S & a Tyres Ltd | Wholesale & retail | 2019 |
| S & B Commercials Limited | Extraterritorial | 1982 |
| S & C Developments (Bognor) Ltd | Professional & scientific | 2013 |
| S & I Property Ltd | Real estate | 2025 |
| S & R Select Plumbing and Heating Ltd | Construction | 2023 |
| S & S Garden Service Limited | Administrative & support | 2000 |
| S & S Home Improvements Ltd | Construction | 2025 |
| S & S Hospitality Downley Limited | Hospitality | 2019 |
| S & S Property Assets Ltd. | Real estate | 2018 |
| S & S Property Lettings Ltd | Real estate | 2019 |
| S a B Kitchens Ltd | Construction | 2008 |
| S a Fazal Ltd | Real estate | 2025 |
| S and I Leicester Ltd | Administrative & support | 2017 |
| S Apex Limited | Information & communication | 2026 |
| S Berry Group Ltd | Financial services | 2026 |
| S Bromham Coaching Ltd | Professional & scientific | 2021 |
| S DAD Developments NO 10 Ltd | Construction | 2018 |
| S DAD Homes Ltd | Real estate | 2018 |
| S Farrell Plumbing & Heating Ltd | Construction | 2024 |
| S G Rigging Ltd | Construction | 2008 |
| S Hamid Limited | Real estate | 2024 |
| S Henson Limited | Construction | 2008 |
| S K Beavis Builders Ltd | Construction | 2004 |
| S K Direct Limited | Wholesale & retail | 2009 |
| S K Property Lettings and Management Limited | Real estate | 2024 |
| S P Firewood Ltd | Agriculture & fishing | 2018 |
| S S P D Limited | Real estate | 2018 |
| S Squared Electrical Ltd | Construction | 2023 |
| S&L Walls and Floors Ltd | Extraterritorial | 2015 |
| S&M(All in One) Ltd | Wholesale & retail | 2025 |
| S.D & R.A. Selleck Electrical Installations Limited | Construction | 2015 |
| S.G Holding Enterprise UK Ltd | Information & communication | 2013 |
| S.G. Busby Limited | Financial services | 1974 |
| S.H.D Property & Maintenance Ltd | Real estate | 2020 |
| S.J Greenfield Ltd | Professional & scientific | 2018 |
| S.J. Gowers & SON Limited | Real estate | 1938 |
| S.K. Commercial Cleaning Services Ltd | Administrative & support | 2000 |
| S.P. Apparels (UK) (P) Limited | Wholesale & retail | 2014 |
| S.R.S. Joinery (High Wycombe) Limited | Manufacturing | 1962 |
| S.W. Building and Carpentry Limited | Construction | 2025 |
| S.Y. Accountancy Limited | Professional & scientific | 2023 |
| S4E Investments Limited | Financial services | 2024 |
| SA Cakes Limited | Wholesale & retail | 2020 |
| SA Constuct Domestic Limited | Construction | 2025 |
| SA Events Limited | Hospitality | 2025 |
| SA Media Solutions Ltd | Information & communication | 2025 |
| SA Mobile Ltd | Wholesale & retail | 2014 |
| SA Shahzad Investments Limited | Real estate | 2025 |
| SA11 Kayani Ltd | Information & communication | 2025 |