| Rayan Reyya Ltd | Transport & logistics | 2023 |
| Raymar Limited | Information & communication | 2015 |
| RC Medical Ltd | Health & social care | 2020 |
| RC Real Estate Ltd | Real estate | 2022 |
| RD Property Ventures Ltd | Real estate | 2026 |
| Rday Properties Ltd | Real estate | 2018 |
| Reachai Ltd | Information & communication | 2023 |
| Real Kitchen Limited | Hospitality | 2026 |
| Reaner Ltd | Administrative & support | 2019 |
| Rebenoc Limited | Health & social care | 2022 |
| Recycling Planet Limited | Water & waste | 2025 |
| Red Malachite Ltd | Education | 2025 |
| Red Robot Number 7 Ltd | Professional & scientific | 2013 |
| Red Tile Property Investment Limited | Real estate | 2021 |
| Reema Motors Limited | Wholesale & retail | 2020 |
| Reforal Ltd | Real estate | 2026 |
| Refoural Property Investment Ltd | Real estate | 2026 |
| REG Adwiser Ltd | Wholesale & retail | 2014 |
| Regentis Group Limited | Information & communication | 2024 |
| Rein Electrical Ltd | Construction | 2023 |
| Reliable Building Contractors Limited | Construction | 2011 |
| Rental Insights by Nelson Ltd | Administrative & support | 2026 |
| Rentierre Ltd | Administrative & support | 2024 |
| Repairs Clinic Ltd | Manufacturing | 2023 |
| Repco Ltd | Information & communication | 2023 |
| Retail Design & Installation Ltd | Manufacturing | 2016 |
| Retail First Limited | Wholesale & retail | 2024 |
| Revitaskin Ltd | Health & social care | 2019 |
| REY Knolls Limited | Professional & scientific | 2026 |
| Rflvd Property Ltd | Real estate | 2022 |
| RG Retailer Ltd | Wholesale & retail | 2024 |
| Richard Matthews Garden Services Ltd | Other services | 2002 |
| Richard Robinson Technology Limited | Information & communication | 2007 |
| Richurban London Limited | Wholesale & retail | 2017 |
| Ridgeway AL Construction Ltd | Construction | 2017 |
| Riga Interiors Limited | Construction | 2003 |
| Rigocean Marine Limited | Extraterritorial | 1997 |
| Rigtrans Intermodal Limited | Manufacturing | 2016 |
| Rikcom Limited | Professional & scientific | 2012 |
| Riverhill Mews Residents Limited | Households | 2004 |
| RIX Roofing Ltd | Construction | 2019 |
| RJW Systems Limited | Information & communication | 1995 |
| RKR Technologies Ltd | Information & communication | 2021 |
| Rkst Properties Ltd | Real estate | 2024 |
| Rnrjd Commercial Investments Limited | Real estate | 2018 |
| Rnts Global Ltd | Professional & scientific | 2014 |
| Rnvj Transport Limited | Transport & logistics | 2024 |
| Robert Parker A.A.L.P.A Limited | Real estate | 1962 |
| Roman Electrical Services (RES) Limited | Construction | 2020 |
| Roosters Grill Tooting Ltd | Hospitality | 2019 |
| Rootline Holdings Limited | Financial services | 2026 |
| Roots of Korea Ltd | Manufacturing | 2019 |
| Roscar Angling Developments EU Limited | Agriculture & fishing | 2013 |
| Rovet Limited | Wholesale & retail | 2004 |
| RSS Middleware Ltd | Professional & scientific | 2016 |
| RT Carpentry & Joinery Ltd | Construction | 2021 |
| Rural Internet Kiosks Limited | Wholesale & retail | 2018 |
| Rvfx Ltd | Information & communication | 2025 |
| RXS Epsilon Ltd | Professional & scientific | 2007 |
| S & T Refrigeration Limited | Other services | 2009 |
| S Q (UK) Limited | Professional & scientific | 2014 |
| S&N Property Ltd | Real estate | 2016 |
| S&R Building Solutions Ltd | Construction | 2020 |
| S.M.E. Success Limited | Professional & scientific | 2015 |
| Saap BAW Ltd | Hospitality | 2026 |
| Sabarai Limited | Wholesale & retail | 2021 |
| Sahi N Associates Limited | Other services | 2016 |
| SAI Civil Engineering Limited | Construction | 2010 |
| SAI Service Station Limited | Wholesale & retail | 2010 |
| Saieaza Services Limited | Extraterritorial | 2022 |
| Saiesh Consulting Ltd | Information & communication | 2017 |
| Sakthi Care Limited | Health & social care | 2015 |
| Sallen Consulting Limited | Information & communication | 2011 |
| Salsin Limited | Households | 1998 |
| Salt and Vinegar (London) Limited | Hospitality | 2017 |
| Saltwood Interiors Ltd | Other services | 2026 |
| Sameer U Ltd | Wholesale & retail | 2017 |
| Samir Property Investments Limited | Construction | 2025 |
| Samitrock Ltd | Real estate | 2019 |
| Sanitat Ltd | Information & communication | 2016 |
| Sarah Technologies Limited | Information & communication | 2010 |
| Sarsa Ltd | Manufacturing | 2024 |
| SAS Marketing Solutions Limited | Professional & scientific | 2024 |
| SAS Professionals Ltd | Real estate | 2019 |
| Savour & Serve Limited | Manufacturing | 2024 |
| Sayee Vishwa Theepam Ltd | Professional & scientific | 2019 |
| Says Estate Ltd | Real estate | 2024 |
| SBB Electrical London Ltd | Construction | 2020 |
| SBC Consulting Limited | Information & communication | 2010 |
| Sbsus Ltd | Real estate | 2022 |
| SCH Home and Outdoor Improvements Ltd | Other services | 2017 |
| Schoolwear Inc Limited | Wholesale & retail | 2017 |
| SCJ Accounting Services Ltd | Professional & scientific | 2009 |
| SD Decorating Ltd | Construction | 2026 |
| SDG Studio Ltd | Wholesale & retail | 2019 |
| Sea Land Sky Limited | Real estate | 2023 |
| Sea Mosaics Ltd | Construction | 2018 |
| Sea Shells Solutions Limited | Information & communication | 2017 |
| Sean Hanna Sutton Limited | Other services | 2010 |
| Seasoned Logs Surrey Ltd | Wholesale & retail | 2019 |