| Rapid Electrical Contracting Limited | Construction | 2024 |
| Rasa Jewellery Ltd | Manufacturing | 2022 |
| Reavell Architects Ltd | Professional & scientific | 2020 |
| Rebus Securities Ltd | Administrative & support | 2017 |
| Red Brick Securities Limited | Real estate | 1999 |
| Red Roots Ltd | Professional & scientific | 2013 |
| Redwood Developments Limited | Construction | 2005 |
| Redwood Electrical Services Ltd | Construction | 2006 |
| Rehoboth LR Limited | Wholesale & retail | 2015 |
| Revolution Recreation Limited | Arts & recreation | 2015 |
| Reynolds Residential Ltd | Real estate | 2021 |
| RHS Investments Limited | Real estate | 2021 |
| Richardson's Renewables Ltd | Construction | 2023 |
| Richborne Media Limited | Professional & scientific | 2011 |
| Ricta Properties Limited | Real estate | 2014 |
| Ridroad Land Company Limited | Real estate | 1975 |
| Riscou Rentals Ltd | Real estate | 2024 |
| Rjb-It Consultancy Limited | Information & communication | 2016 |
| Rjln Limited | Information & communication | 2021 |
| Rman Electrical Services Ltd | Professional & scientific | 2018 |
| Robert Marshall Consulting Limited | Professional & scientific | 2017 |
| Rock Consulting and Advisory Limited | Professional & scientific | 2016 |
| Rodlokka Ltd | Professional & scientific | 2011 |
| Rolfe Properties Limited | Real estate | 2016 |
| Roofing Croydon Ltd | Construction | 2025 |
| ROX Consultancy Services Limited | Other services | 2025 |
| Roycare Ltd | Health & social care | 2023 |
| Rubicon SPV Limited | Construction | 2025 |
| Ruchat Estates Limited | Real estate | 2025 |
| Rudi Investments Limited | Real estate | 2025 |
| Rvgr Ltd | Professional & scientific | 2017 |
| S W Nicholls Ltd | Construction | 2013 |
| SAN Groundworks Limited | Administrative & support | 2026 |
| Sannak Limited | Financial services | 2022 |
| Sapna Radia Orthodontics Ltd | Health & social care | 2014 |
| Saviour World Limited | Wholesale & retail | 2013 |
| Science and Technology Solutions Limited | Professional & scientific | 2015 |
| SDP Solutions Limited | Real estate | 2019 |
| SDR Waste Maintenance & Recycling Ltd | Water & waste | 2015 |
| Searchwood Heights Estate Management Co Ltd | Households | 2007 |
| Secure by Design Consultancy Limited | Information & communication | 2016 |
| Security Wise Solutions Limited | Administrative & support | 2019 |
| Seeva Consulting Ltd | Professional & scientific | 2024 |
| SEP London Limited | Construction | 2015 |
| SES Global Systems Ltd | Information & communication | 2013 |
| SES Systems Group Ltd | Information & communication | 2024 |
| Sherlock Smartseal Ltd | Construction | 2023 |
| Shivsap (Holdings) Ltd | Financial services | 2017 |
| Shivsap Ltd | Financial services | 2017 |
| Shop the Look Ltd | Wholesale & retail | 2022 |
| Sidevine Limited | Households | 1982 |
| Simon Coleman Ltd | Administrative & support | 2015 |
| Simply the Pets Limited | Other services | 2014 |
| Sister Pledge Cleaning Services Ltd | Water & waste | 2016 |
| SIXTY60 Communication Limited | Construction | 2025 |
| Skidhill Investments Limited | Financial services | 2016 |
| Skill UP Safety Limited | Education | 2021 |
| Skillsphere Consulting Limited | Professional & scientific | 2024 |
| Skim X Plastering Ltd | Construction | 2020 |
| Sliding Wardrobes Ltd | Administrative & support | 2010 |
| SLM Interior Ltd | Construction | 2019 |
| SLZ Properties Ltd | Real estate | 2025 |
| SMS Creative Photography Limited | Professional & scientific | 2003 |
| Soju Domestic Buildings Ltd | Construction | 2022 |
| Solplace Limited | Households | 1980 |
| Soul Purpose Space CIC | Health & social care | 2026 |
| Southdown Building Services Ltd | Construction | 2019 |
| Southwest Hamsey Green Ltd | Construction | 2021 |
| SP Gilligan Ltd | Construction | 2021 |
| Spears Close Residents Limited | Real estate | 2016 |
| Spire Place Freehold Management Company Limited | Real estate | 2004 |
| Sport ED EX Limited | Education | 2023 |
| Sporting Excellence Group Limited | Arts & recreation | 2021 |
| Spotiva Ltd | Administrative & support | 2025 |
| Sqlconnect Ltd | Information & communication | 2012 |
| Squeaki Clean Limited | Administrative & support | 2013 |
| ST Lukes Mews Limited | Real estate | 2014 |
| Stage One Paving & Landscaping Limited | Construction | 2018 |
| Stak Solutions Ltd | Professional & scientific | 2022 |
| Stoneycroft Investments Limited | Financial services | 2022 |
| Sunflower Healthcare Limited | Health & social care | 2006 |
| Sunflower Healthcare (Greenford) LLP | | 2006 |
| Sunflower Healthcare Huddersfield Ltd | Health & social care | 2010 |
| Supa-Shade Limited | Manufacturing | 2005 |
| Superfly Rigging Services Limited | Construction | 2019 |
| Surrey Custom Clothing Ltd | Professional & scientific | 2025 |
| Surrey Plumbing Solutions Limited | Construction | 2015 |
| Susie Parriss Casting Limited | Information & communication | 2002 |
| Sussex Demolition Services Limited | Construction | 1967 |
| Swarm Competitions Limited | Wholesale & retail | 2023 |
| Sycamore Place (Warlingham) Management Company Ltd | Households | 2021 |
| Symphony Hearing (UK) Limited | Wholesale & retail | 2018 |
| Symphony Sound (UK) Limited | Wholesale & retail | 2024 |
| Systemsdna Limited | Information & communication | 2019 |
| Tanby Group Limited | Financial services | 2023 |
| Tanby Pools Limited | Construction | 2014 |
| Tanby Wellness Limited | Construction | 2026 |
| Tandridge Learning Trust | Education | 2012 |
| Targa Construction Ltd | Construction | 2025 |
| Team Property Ltd | Real estate | 2022 |