| RAM Installations Limited | Construction | 2015 |
| Rame Commercial Management Ltd | Professional & scientific | 2025 |
| Rame Consulting Holdings (2) Limited | Financial services | 2024 |
| Rame Consulting Holdings Limited | Financial services | 2021 |
| Raptor Energy Systems UK Ltd | Professional & scientific | 2026 |
| Ravelston Grange FHC Limited | Households | 2025 |
| Ravensbourne Construction Limited | Construction | 1998 |
| Ravenswood Toy Company Ltd | Wholesale & retail | 2015 |
| RDM Consultants Limited | Construction | 2017 |
| React Music Publishing Limited | Arts & recreation | 1997 |
| Real Animation Works Limited | Professional & scientific | 2009 |
| Reality PR Limited | Administrative & support | 2003 |
| Realtypackaging Ltd | Financial services | 2026 |
| Red Square Consulting Limited | Information & communication | 2012 |
| Redyar Ltd | Wholesale & retail | 2020 |
| Regent Tandoori Ltd | Hospitality | 2019 |
| Rehan Intellij Ltd | Information & communication | 2018 |
| Reliable Enterprise Group Ltd | Real estate | 2023 |
| Rema 88 Limited | Other services | 2023 |
| Renew Architecture and Design Ltd | Professional & scientific | 2018 |
| Residential Property Surveyors Ltd | Professional & scientific | 2025 |
| RG Transport Solutions Limited | Transport & logistics | 2024 |
| RGC Holding Group Limited | Administrative & support | 2024 |
| Rhodehurst Limited | Real estate | 2004 |
| Richard Jakob Executive Search Limited | Administrative & support | 2017 |
| Richmond Health Limited | Health & social care | 2025 |
| Rivendale Care Limited | Health & social care | 2007 |
| Rivendale Vale Limited | Administrative & support | 2007 |
| ROB RYE Limited | Professional & scientific | 2017 |
| Robert James Bespoke Furniture Specialist Ltd | Manufacturing | 2016 |
| Robert Vincent Estate Agents Limited | Real estate | 2013 |
| Robert Vincent Estate Agents Sales Limited | Real estate | 2016 |
| Rocha Rising Limited | Education | 2026 |
| Rodin Limited | Hospitality | 2023 |
| Rodney Wilson and SON Ltd. | Construction | 2011 |
| RON Timehin Productions Ltd | Professional & scientific | 2021 |
| Ronati UK Limited | Information & communication | 2021 |
| Rose Valley Enterprises Ltd | Health & social care | 2014 |
| Rose'Nbell Ltd | Wholesale & retail | 2015 |
| Rouse Bathrooms Limited | Wholesale & retail | 2002 |
| Rouse Tile Studio Ltd | Construction | 2023 |
| Routemap Limited | Professional & scientific | 2016 |
| Roxburgh Estates Limited | Real estate | 1989 |
| Rozem Limited | Hospitality | 2015 |
| RSG Works Ltd | Transport & logistics | 2024 |
| Rtmuk Limited | Professional & scientific | 2017 |
| Ruella Solutions Ltd | Professional & scientific | 2024 |
| Ruff 2 Buff Dog Grooming Services Ltd | Other services | 2025 |
| Rumlink Limited | Real estate | 1988 |
| Run the Numbers Limited | Professional & scientific | 2024 |
| Rural Living Developments Limited | Construction | 2025 |
| RXP Property Management Ltd | Real estate | 2021 |
| S & S Services (Kent) Ltd | Wholesale & retail | 2014 |
| S J Sweeney & Company Limited | Manufacturing | 1995 |
| S P Connor Quality Decorating Limited | Construction | 2007 |
| S S V T Super Stores Ltd | Wholesale & retail | 2013 |
| S Smith Air Conditioning Limited | Construction | 2008 |
| S Z Consultancy Ltd | Professional & scientific | 2026 |
| S.A Barbers West Wickham Ltd | Other services | 2024 |
| SAI RM Enterprise Ltd | Wholesale & retail | 2019 |
| Sakejo Limited | Construction | 2007 |
| Samli Kirtas Limited | Real estate | 2024 |
| Sandford Allotment and Gardens Limited | Agriculture & fishing | 2020 |
| Sanger & George Limited | Information & communication | 2018 |
| Saranda ALB Ltd | Real estate | 2017 |
| Saranda Group Ltd | Real estate | 2018 |
| Savvides Wealth Management Ltd | Financial services | 2014 |
| Sc-Gc Holdings Limited | Financial services | 2024 |
| Scalehire Group Ltd | Administrative & support | 2026 |
| School Explained Limited | Education | 2013 |
| SCM Promotions Ltd | Administrative & support | 2022 |
| Scott Minto Productions Limited | Administrative & support | 2006 |
| SD Consultancy and Advisory Limited | Professional & scientific | 2017 |
| SE Logistics 2020 Ltd | Transport & logistics | 2021 |
| SE Realty Limited | Real estate | 2021 |
| Sea Wave Beauty Ltd | Other services | 2018 |
| Sea Wave Hair Limited | Other services | 2013 |
| Seaford Homes Limited | Health & social care | 1999 |
| Seager Safety Ltd | Construction | 2024 |
| Securigence Limited | Construction | 2021 |
| Sefa-Olczak Ltd | Administrative & support | 2017 |
| Segotex Ltd | Wholesale & retail | 2024 |
| SEL Community Pharmacy FED Limited | Professional & scientific | 2023 |
| Send Solutions Partnership Ltd | Education | 2026 |
| Serasli Limited | Real estate | 2019 |
| Sergeant Investments Ltd | Professional & scientific | 2022 |
| Session KIT Limited | Wholesale & retail | 2023 |
| SGC Property Ltd | Real estate | 2026 |
| Sharp World Limited | Professional & scientific | 2012 |
| Shea Properties Ltd | Construction | 2024 |
| SHG Property Ltd | Real estate | 2024 |
| Shinex (PVT) Limited | Administrative & support | 2026 |
| SHOP-DAILY17 Ltd | Wholesale & retail | 2026 |
| Shopware UK Limited | Information & communication | 2004 |
| Sicilian Chef Limited | Hospitality | 2007 |
| Siddiqui Taxi Limited | Transport & logistics | 2026 |
| Silk Routes Limited | Wholesale & retail | 2010 |
| Silver Square Consultancy Ltd | Administrative & support | 2023 |
| Silver Square Property Ltd | Real estate | 2020 |
| Silverdale RTM Company Limited | Households | 2025 |