| RP Pharma Limited | Professional & scientific | 2014 |
| RP Travel Limited | Administrative & support | 2023 |
| Rr@As Ltd | Hospitality | 2022 |
| RRA Management Limited | Professional & scientific | 2026 |
| RRS Lighting Ltd | Construction | 2017 |
| RS Vintage Limited | Wholesale & retail | 2022 |
| RSA Freehold Limited | Real estate | 2026 |
| Rscf Holding Limited | Education | 2025 |
| Rscf Limited | Education | 2012 |
| Rscomnetwork Ltd | Construction | 2019 |
| RSK Eighteen UK Ltd | Hospitality | 2019 |
| RT Advisory Limited | Arts & recreation | 2022 |
| RTS GRP PLC | Wholesale & retail | 2018 |
| Ruaa Strategic and Future Studies Ltd | Professional & scientific | 2025 |
| Rubicon PM Ltd | Construction | 2018 |
| Ruby Road Limited | Financial services | 2021 |
| Rumble Mill Ltd | Information & communication | 2022 |
| Rumit Limited | Information & communication | 2023 |
| Run Light Limited | Information & communication | 2015 |
| Runfest Limited | Arts & recreation | 2013 |
| Ruptura Solutions Limited | Information & communication | 2021 |
| RUS Consult Limited | Professional & scientific | 2013 |
| Rushmere Place (Wimbledon) Management Company Limited | Households | 1992 |
| Russell Court (Surbiton) Maintenance Association Limited | Households | 1961 |
| Rustic & Real Ltd | Hospitality | 2025 |
| Ruth Wills Ltd | Real estate | 2024 |
| Rutland Court (Kingston) Freehold Limited | Households | 2018 |
| Rutland Lodge (Teddington) Residents Association Limited | Households | 1970 |
| Rvhe Consulting Limited | Professional & scientific | 2025 |
| RW Uxbridge Limited | Real estate | 2024 |
| RWO London Ltd | Wholesale & retail | 2017 |
| Rwre Limited | Real estate | 2025 |
| RY Procurement Limited | Professional & scientific | 2023 |
| Ryams IT Limited | Information & communication | 2015 |
| Ryan Chilcote Productions Ltd | Professional & scientific | 2017 |
| Ryan SK Limited | Real estate | 2024 |
| Rydell Properties Limited | Professional & scientific | 2005 |
| S & G Support Services Limited | Administrative & support | 2017 |
| S & J Investment Consulting Co. Ltd | Real estate | 2025 |
| S & R Mortgage Services Limited | Financial services | 2012 |
| S Islam & Co Limited | Professional & scientific | 2020 |
| S L Management Company Limited | Households | 2018 |
| S Mccall Ltd | Professional & scientific | 2023 |
| S&J Property Management Services LLP | | 2023 |
| S&P Management Limited | Real estate | 2025 |
| S&S First Limited | Real estate | 2015 |
| S&W Consultancy Limited | Professional & scientific | 2023 |
| S-Industries Ltd | Extraterritorial | 2015 |
| S. D. P. Floor Screeds Limited | Construction | 2004 |
| S. U. N. (London) Limited | Construction | 1986 |
| S.Ali Holdings Ltd | Wholesale & retail | 2021 |
| S.Bissett Management Limited | Information & communication | 2013 |
| S.E.A. Courier Ltd | Transport & logistics | 2019 |
| S.P.I. Freight Limited | Transport & logistics | 2008 |
| S.R. Brothers Limited | Administrative & support | 1999 |
| S.S Sylvester Ltd | Health & social care | 2023 |
| S.V. Dale (London) Limited | Education | 2013 |
| S4 Applications Limited | Wholesale & retail | 2016 |
| S4SYSTEMS Limited | Professional & scientific | 2016 |
| S4SYTEMS Properties Limited | Real estate | 2019 |
| SA Ledgers Ltd | Professional & scientific | 2019 |
| Sabrenet I.T. Limited | | 1999 |
| Sacred Heart Care Limited | Health & social care | 2011 |
| Sadaqah Seekers Ltd | Health & social care | 2024 |
| Saddlers Mews (Hampton Wick) RES. Assoc. Limited | Other services | 1995 |
| Safc Consulting Limited | Professional & scientific | 2024 |
| Safe Fire and Security Ltd | Construction | 2011 |
| Safe Haven Books Ltd | Information & communication | 2015 |
| Safer Training Solutions Ltd | Education | 2014 |
| Safetycare (UK) Limited | Manufacturing | 1991 |
| Safezone Services Ltd | Wholesale & retail | 2024 |
| Safl Ventures Ltd | Real estate | 2016 |
| Sagence Health Ltd | Information & communication | 2025 |
| Sahaj Recruitment Services Ltd | Administrative & support | 2025 |
| SAI Sharavana Ltd. | Real estate | 2018 |
| Sailing Around Ltd | Administrative & support | 2024 |
| Saipem Limited | Construction | 2010 |
| Sakura Digital Consulting Limited | Professional & scientific | 2017 |
| Sales Kinetics Limited | Professional & scientific | 2012 |
| Salient Medical Communications Ltd. | Professional & scientific | 2017 |
| Saltrock Surfwear Limited | Wholesale & retail | 2018 |
| SAM Corporate UK Ltd | Extraterritorial | 2020 |
| SAM Darby Marketing Ltd | Professional & scientific | 2023 |
| Samad & Brothers Ltd | Hospitality | 2026 |
| Samahoma Media Advisors Limited | Professional & scientific | 2019 |
| Samaya Investments Limited | Wholesale & retail | 2002 |
| Samirs Food Limited | Hospitality | 2025 |
| Samso Limited | Construction | 2023 |
| Sanara Properties Ltd | Real estate | 2023 |
| Sandcross Limited | Construction | 2025 |
| Sandoren Investments Limited | Real estate | 2008 |
| Sandoren Limited | Extraterritorial | 1995 |
| Sandpipers Place Buildings Management Limited | Households | 2008 |
| Sandus Capital Limited | Construction | 2018 |
| Sansaran-It Ltd | Information & communication | 2025 |
| Santini Cleaning Ltd | Administrative & support | 2024 |
| Sanvi Carpets Ltd | Wholesale & retail | 2022 |
| Sanyang Design Ltd | Professional & scientific | 2022 |
| Sanzeal Limited | Information & communication | 2006 |
| SAP Kingston Limited | Hospitality | 2021 |