| Rodos LP | | 2022 |
| Roger Gomm Limited | Administrative & support | 2012 |
| ROI Solutions Limited | Information & communication | 2002 |
| ROJ Design Limited | Professional & scientific | 2013 |
| Rokera Limited | Information & communication | 2003 |
| Rolling Road Resources Ltd | Mining & quarrying | 2018 |
| Rolmot Group Co Limited | Extraterritorial | 2021 |
| ROM Associates Limited | Information & communication | 1986 |
| Romail Limited | Wholesale & retail | 1987 |
| Romalodi LLP | | 2011 |
| Romanangel Limited | Extraterritorial | 2001 |
| Ronin Inc. Limited | Wholesale & retail | 2025 |
| Rooftop Roofing Limited | Construction | 2018 |
| Room 9 Music Ltd | Arts & recreation | 2025 |
| ROOT2 Tax (Dispute Resolution) Limited | Professional & scientific | 2014 |
| Rooted Architecture Limited | Professional & scientific | 2010 |
| Rosamar Properties Limited | Real estate | 1963 |
| Rosetrax Limited | Administrative & support | 2010 |
| Roseworld Healthcare Ltd | Health & social care | 2013 |
| Rosslyn Management Company Limited | Real estate | 1983 |
| Rothsay Court (Gower Road) Management Company Limited | Households | 2015 |
| Routinely Limited | Administrative & support | 2026 |
| Roxborough Mortgages Limited | Financial services | 2023 |
| Roxko Ltd | Wholesale & retail | 2025 |
| Royale Care UK Limited | Health & social care | 2015 |
| Roycott Limited | Manufacturing | 1938 |
| Royndin Ltd | Information & communication | 2021 |
| Rpfy Limited | Real estate | 2020 |
| Rpmm Global Ltd | Arts & recreation | 2016 |
| RPS Service Ltd | Manufacturing | 2014 |
| RRK Property Limited | Construction | 2019 |
| RSB 13 Limited | Real estate | 2018 |
| RSS Investments and Trading Limited | Financial services | 2024 |
| RTS Assist Ltd | Wholesale & retail | 2024 |
| Ruby London Limited | Manufacturing | 2005 |
| Ruby SC Ltd | Transport & logistics | 2023 |
| RUD Estates Limited | Real estate | 2017 |
| Rudgard City Limited | Wholesale & retail | 1999 |
| Rufus Solutions Limited | Information & communication | 2017 |
| Rugbytots Hersham Ltd | Education | 2022 |
| Runnymede (Holdings) Limited | Financial services | 2013 |
| Runnymede Homes (Esher) Limited | Construction | 2024 |
| Runnymede Homes Limited | Construction | 2011 |
| Runnymede Investments Limited | Real estate | 1994 |
| Rupert Morgan Limited | Professional & scientific | 2012 |
| Rupert Trusler Associates Limited | Administrative & support | 2010 |
| Rural Energy Saving Grants Ltd | Professional & scientific | 2022 |
| Rush Hour 4 Limited | Wholesale & retail | 2022 |
| Russell Geotechnical Innovations Limited | Administrative & support | 2007 |
| Russmeyer Ltd | Professional & scientific | 2018 |
| Rust Resources Holdco Limited | Professional & scientific | 2012 |
| Rust Resources Limited | Administrative & support | 1992 |
| Rustic Bros Pizza Co Ltd | Hospitality | 2022 |
| Rutherford Property Developments Ltd | Real estate | 2024 |
| Rutherford Property Investments Limited | Real estate | 2018 |
| Rutherford Property Surveyors Ltd | Professional & scientific | 2020 |
| Ruxbury Property Investments Limited | Real estate | 2020 |
| Ruyi Investment Limited | Professional & scientific | 2016 |
| Ruyi Real Estate Management Limited | Real estate | 2018 |
| RWC Portobello Limited | Wholesale & retail | 2010 |
| RWH Consulting LLP | | 2026 |
| Ryan Nangle Media Limited | Professional & scientific | 2017 |
| Rynloc Ltd | Professional & scientific | 2016 |
| Ryserve Ltd | Manufacturing | 2023 |
| S & J Finance Ltd | Professional & scientific | 2024 |
| S & L Ventures Limited | Construction | 2012 |
| S & S Asset Management Limited | Real estate | 2021 |
| S J Landscaping Limited | Administrative & support | 2003 |
| S J Tenzin Limited | Administrative & support | 2012 |
| S M Blakemore Ltd | Information & communication | 2024 |
| S Pabla Limited | Hospitality | 2016 |
| S R Tweed Limited | Financial services | 2016 |
| S&P BUY4LESS Ltd | Wholesale & retail | 2023 |
| S.N.G. Holdings Limited | Professional & scientific | 1996 |
| S.R.P. Consultancy Limited | Other services | 2011 |
| S.R.P. Inventories Franchise Limited | Real estate | 2017 |
| S2S Investments Limited | Real estate | 2021 |
| S2SMARTS Limited | Wholesale & retail | 2009 |
| Sabear Limited | Professional & scientific | 2004 |
| Sacabaya Limited | Information & communication | 2006 |
| Sachem Ltd. | Extraterritorial | 2008 |
| Saeb Consultancy Limited | Financial services | 2016 |
| Safe Space Lockers Ltd | Other services | 2004 |
| Safe Space Spares LLP | | 2011 |
| Safety Factors Limited | Other services | 2010 |
| Saffron Brand Consultants Limited | Administrative & support | 2002 |
| Sage Management & Marketing Limited | Administrative & support | 1987 |
| SAI Lasha Limited | Hospitality | 2023 |
| Saint Bay Studio Limited | Professional & scientific | 2025 |
| Sajas Limited | Real estate | 2002 |
| Sales Angel Ltd | Other services | 2025 |
| Salford One SPV Limited | Real estate | 2016 |
| Salisbury Burwood Limited | Professional & scientific | 2012 |
| Salmon Heaton & Kimmins Limited | Administrative & support | 1993 |
| Salon Vision Consulting Limited | Professional & scientific | 2023 |
| Salt and Staged Property Staging Ltd | Professional & scientific | 2023 |
| Salter Training and Consulting Limited | Professional & scientific | 2018 |
| Salvare Worldwide Limited | Wholesale & retail | 2014 |
| Samark Consulting Limited | Professional & scientific | 2014 |
| Samax Limited | Professional & scientific | 2021 |