| Quaest Resourcing Limited | Professional & scientific | 2002 |
| Quantum Lane AI Ltd | Information & communication | 2025 |
| Questacre Limited | Construction | 1979 |
| Quincewood Holdings Ltd | Real estate | 2023 |
| R J Elphick Limited | Real estate | 2015 |
| R Squared Electrical Ltd | Construction | 2022 |
| R&K Scaffolding Ltd | Construction | 2025 |
| Ralliwood Road Society Limited | Households | 1996 |
| Rapid Answers Limited | Information & communication | 1996 |
| Rarama Ltd | Professional & scientific | 2022 |
| Ratho Advisory Services Limited | Professional & scientific | 2023 |
| Ravenscourt Palace Road Limited | Households | 2015 |
| RE4M Limited | Information & communication | 2019 |
| Rectory Close Ashtead Limited | Extraterritorial | 2014 |
| Red Helix Group Ltd | Information & communication | 2020 |
| Red Lotus Digital Marketing Ltd | Information & communication | 2026 |
| Red River Computing Limited | Information & communication | 1986 |
| Redwood Electrical UK Ltd | Construction | 2024 |
| Refined Polymers Limited | Manufacturing | 2011 |
| Refined Products and Services Group Ltd | Administrative & support | 2016 |
| Reidys Consultancy Limited | Professional & scientific | 2011 |
| Relck Limited | Administrative & support | 2023 |
| Rep-Cars Limited | Wholesale & retail | 2002 |
| Replix AI Ltd | Information & communication | 2026 |
| Retrosource Limited | Information & communication | 2023 |
| Rhotau Consulting Ltd | Professional & scientific | 2024 |
| Richard Berliand Limited | Professional & scientific | 2011 |
| Richard Matthews Consultancy Ltd | Administrative & support | 2015 |
| Ringside Social Management Ltd | Professional & scientific | 2025 |
| Rita (Publishing) Limited | Information & communication | 1981 |
| Riva Recruitment Ltd | Administrative & support | 2020 |
| River Bloom Coaching Ltd | Professional & scientific | 2019 |
| Rivulo Ltd | Information & communication | 2025 |
| RJA Wealth Management Ltd | Professional & scientific | 2015 |
| RMW OIL Advisors Limited | Professional & scientific | 2016 |
| Robin Ayres Building Services Limited | Construction | 2004 |
| Roman Khromin Ltd | Information & communication | 2025 |
| Roman Property Limited | Real estate | 1996 |
| Rookery Hill Services Limited | Administrative & support | 2019 |
| Roundel Pipework Limited | Construction | 2026 |
| Royall Tree Services Limited | Administrative & support | 2023 |
| Royan Group Management Limited | Construction | 2023 |
| Rpcl Ltd | Transport & logistics | 2024 |
| Ruffwood Hampton Development Limited | Construction | 1999 |
| Ruffwood Hampton Holdings Limited | Construction | 2010 |
| Ruxley Cleaning Services Limited | Administrative & support | 2025 |
| RYE Field Management Limited | Real estate | 1998 |
| Ryefield Finance Limited | Professional & scientific | 2020 |
| S&M Building & Plumbing Services Limited | Construction | 2024 |
| S. Korea Consulting Ltd | Other services | 2012 |
| Salo Consulting Limited | Administrative & support | 2016 |
| Sant (London) Limited | Administrative & support | 2009 |
| Sarah Kate London Ltd | Professional & scientific | 2022 |
| Savage Tiger Ltd | Professional & scientific | 2022 |
| Sawel Investments Limited | Real estate | 2001 |
| Sbsw Construction Ltd | Construction | 2013 |
| SEARCH22 Ltd | Administrative & support | 2014 |
| Secure Veillance Limited | Administrative & support | 2026 |
| Semaphore Productions Limited | Information & communication | 2003 |
| Send Marsh Limited | Information & communication | 2013 |
| Sensus People Ltd | Professional & scientific | 2013 |
| Shastan Limited | Administrative & support | 2012 |
| Shepperton Court Residents Company Limited | Households | 1992 |
| Shier Holdings Limited | Other services | 2024 |
| Shift Consulting Ltd | Professional & scientific | 2024 |
| Shiraz IT Consultants Ltd | Information & communication | 2018 |
| SHK Solutions Ltd | Professional & scientific | 2018 |
| Shoreline Construction Management Ltd | Construction | 2018 |
| Sico Technical Services Limited | Professional & scientific | 2001 |
| Siecle VR Ltd | Other services | 2020 |
| Silver Key Developments Limited | Real estate | 2018 |
| Silver Key Projects Ltd | Real estate | 2023 |
| Simpson Boswell Services Limited | Professional & scientific | 2023 |
| Simpsons Estates Ltd | Professional & scientific | 2022 |
| Slick Clean Services Ltd | Administrative & support | 2013 |
| Solis Property Ltd | Real estate | 2018 |
| Solomon & Silver Limited | Extraterritorial | 2016 |
| Sona GRP Ltd | Professional & scientific | 2024 |
| Southern Counties Services (Technologies) Ltd | Construction | 2015 |
| Sparker Lighting Ltd | Information & communication | 2023 |
| Spectre Military Equipment Ltd | Wholesale & retail | 2018 |
| Sportshareapp Limited | Information & communication | 2021 |
| Srvr Limited | Information & communication | 2017 |
| ST George Property Management Company Limited | Households | 2002 |
| ST George's Cafe Ltd | Hospitality | 2026 |
| Stable Dean Enterprises Limited | Professional & scientific | 2025 |
| Stag Leys (Ashtead) Management Company Limited | Administrative & support | 1989 |
| Stannard & Sparkes Limited | Extraterritorial | 2016 |
| Staple Street Limited | Extraterritorial | 2020 |
| Stems Floral Design Ltd | Wholesale & retail | 2003 |
| Stephen Holmes Ltd | Professional & scientific | 2021 |
| Stephen Ward & Associates (Accountancy) Ltd. | Professional & scientific | 2011 |
| Steve Howe Consulting Limited | Professional & scientific | 2017 |
| Steve Kearney Consulting (SKC) Limited | Professional & scientific | 2006 |
| Steven Lewis Associates Limited | Administrative & support | 2008 |
| Stringer Brothers Limited | Construction | 1999 |
| Subtle Ideas Ltd | Administrative & support | 2025 |
| Sul-Fit Carpenters Limited | Construction | 2019 |
| Sunderland Partners Limited | Extraterritorial | 2015 |
| Supreme Nails & Beauty Limited | Other services | 2020 |