| Rljg Limited | Real estate | 2025 |
| RLX Building Ltd | Construction | 2021 |
| RM Aspire Construction Ltd | Construction | 2018 |
| RM Estate Holdings Limited | Real estate | 2024 |
| RMC Building & Civil ENG Limited | Extraterritorial | 2013 |
| RNV Advisory Ltd | Financial services | 2021 |
| Roam Care Ltd | Manufacturing | 2020 |
| Robeen Ltd | Wholesale & retail | 2022 |
| Robert Raeburn Limited | Professional & scientific | 2026 |
| Robert Zarychta Limited | Construction | 2013 |
| Robina Property Ltd | Real estate | 2020 |
| Robur Popa Ltd | Transport & logistics | 2025 |
| Rocco Property Investments Limited | Real estate | 2020 |
| Rock Luggage Ltd | Wholesale & retail | 2021 |
| ROE Repairs Limited | Wholesale & retail | 2026 |
| Rokwood Roofing Limited | Construction | 2016 |
| Romkino Group Ltd | Wholesale & retail | 2023 |
| Ronville Securities Limited | Financial services | 2010 |
| Rooru Investments Ltd | Real estate | 2021 |
| Roots Cookery Limited | Professional & scientific | 2023 |
| Roowi Ltd | Wholesale & retail | 2021 |
| Rope Access Provider Limited | Construction | 2019 |
| Rosalie Care Holdings Limited | Health & social care | 2023 |
| Rosalie Care Limited | Health & social care | 2023 |
| Rosalie Properties Limited | Real estate | 2023 |
| Rosewhite Rigging Ltd | Construction | 2017 |
| Rotevatn Ltd | Information & communication | 2025 |
| Rouge Technologies Ltd | Wholesale & retail | 2021 |
| Roundgrove Limited | Other services | 1978 |
| Rovisa Fashion Design Ltd | Other services | 2012 |
| Royale Argan OIL Ltd | Wholesale & retail | 2023 |
| Rreva Eco Thread Limited | Wholesale & retail | 2025 |
| RRR Interiors Limited | Construction | 2021 |
| RS London Building Services Ltd | Construction | 2025 |
| RS Motor Trading Limited | Wholesale & retail | 2012 |
| RS Payroll & Taxation Limited | Professional & scientific | 2014 |
| RS Printers Limited | Manufacturing | 2004 |
| RS Property Maintenance Limited | Other services | 2009 |
| RS PVT Ltd | Professional & scientific | 2016 |
| RS Ratiocinators Limited | Professional & scientific | 2014 |
| Rs-Aridan Ltd | Real estate | 2024 |
| Rsgalway Ltd | Wholesale & retail | 2016 |
| RSK UB6 Limited | Hospitality | 2024 |
| Rtmc Ltd | Hospitality | 2023 |
| Ruby's Catering Services Ltd | Hospitality | 2009 |
| Ruci Construction Ltd | Construction | 2020 |
| Ruct Limited | Wholesale & retail | 2017 |
| Rudz Limited | Real estate | 2016 |
| Ruislip Consultancy Services Limited | Administrative & support | 2014 |
| Ruislip Road News Agent Ltd | Wholesale & retail | 2024 |
| Rumisev Ltd | Construction | 2018 |
| Runner Logistics Limited | Transport & logistics | 2019 |
| Runway Ready Limited | Wholesale & retail | 2023 |
| Russelh Limited | Wholesale & retail | 2025 |
| RV Haulier Ltd | Transport & logistics | 2020 |
| Rvsg Limited | Real estate | 2024 |
| RW Contractors Ltd | Construction | 2019 |
| RY Builder Ltd | Construction | 2026 |
| Ryan Sampson Ltd | Arts & recreation | 2015 |
| Rydemotors Limited | Administrative & support | 2024 |
| RYL Auto Lounge Ltd | Wholesale & retail | 2026 |
| Ryts Construction Ltd | Construction | 2022 |
| RZ Building Construction Ltd | Construction | 2015 |
| S & S Innovations Ltd | Construction | 2024 |
| S a Trade Limited | Wholesale & retail | 2021 |
| S Express Shipping Limited | Wholesale & retail | 2025 |
| S G Construct Limited | Construction | 2025 |
| S Nikolas Ltd | Construction | 2014 |
| S Photographic Ltd | Professional & scientific | 2013 |
| S R Kitchen & Bedroom Limited | Construction | 2020 |
| S& S Rugs Ltd | Wholesale & retail | 2019 |
| S&G Gill Investment Ltd | Real estate | 2024 |
| S&Jp Holding Ltd | Financial services | 2021 |
| S&K2 Services Ltd | Construction | 2025 |
| S&R Asset Management Ltd | Administrative & support | 2020 |
| S&S Maintainence Ltd | Construction | 2026 |
| S. Franses Limited | Wholesale & retail | 1959 |
| S.C. Recovery Limited | Wholesale & retail | 2005 |
| S.D.S. Properties Limited | Real estate | 2014 |
| S.E. Build Ltd | Construction | 2011 |
| S.H Contract Solutions Ltd | Administrative & support | 2017 |
| S.H. Badak Ltd | Real estate | 2024 |
| S.Motiram (UK) Limited | Wholesale & retail | 2023 |
| S.S Consultants & Build Limited | Construction | 2024 |
| S.S.T Brothers & Co Ltd | Financial services | 2025 |
| S2V Property Measures Limited | Professional & scientific | 2020 |
| SA Housing Group Limited | Real estate | 2026 |
| Saab Residential Property Limited | Real estate | 2026 |
| SAB Lettings Limited | Real estate | 2012 |
| Sab.Pb Construction Ltd | Construction | 2021 |
| Saba Property & Investment Co Limited | Real estate | 1962 |
| Sabichi Limited | Wholesale & retail | 2011 |
| Sabrina Ferrier Ltd | Administrative & support | 2022 |
| Sabroso Chicken Ltd | Hospitality | 2015 |
| Sachveer Limited | Wholesale & retail | 2024 |
| Sadashiv Properties Limited | Real estate | 2024 |
| Sadia Majid Limited | Other services | 2018 |
| Safa Motorsport Ltd | Wholesale & retail | 2022 |
| Safandarley UK Ltd | Administrative & support | 2007 |
| Safari Daycare Ltd | Health & social care | 2018 |