| Riverhouse Barn Limited | Arts & recreation | 1989 |
| Riverpunch Films Ltd | Information & communication | 2021 |
| Riverside Rebels Limited | Arts & recreation | 2018 |
| RJW Studio Limited | Information & communication | 2025 |
| RMH Florio Ltd | Professional & scientific | 2025 |
| RN Graphic Ltd | Manufacturing | 2025 |
| RNT Events Ltd | Hospitality | 2024 |
| Roadmovers Logistics Limited | Transport & logistics | 2025 |
| Roadtrip Motorcycles Ltd | Administrative & support | 2022 |
| Roar Bros Limited | Real estate | 2023 |
| Robann Holdings Limited | Professional & scientific | 2016 |
| Robert Douglas Associates LLP | | 2005 |
| Robertson (23) Investments Limited | Administrative & support | 2023 |
| Robins Wing Estates Management Limited | Real estate | 2015 |
| Robins Wing Investments Limited | Administrative & support | 2011 |
| Robot Angel Limited | Arts & recreation | 2012 |
| Robots Incorporated Limited | Wholesale & retail | 2008 |
| Rock Renaissance Limited | Arts & recreation | 2009 |
| Rodin Global Ltd | Construction | 2020 |
| Roland John Hair Studio Limited | Other services | 2006 |
| Roll Play Limited | Wholesale & retail | 2025 |
| Roosanj Movers and Logistics Ltd | Transport & logistics | 2018 |
| Ropefield LLP | | 2020 |
| Rosewood of Walton Limited | Hospitality | 2017 |
| Rosieh Group Ltd | Construction | 2021 |
| Rosienna Hemp Consultancy Ltd | Professional & scientific | 2025 |
| Route 2 Group Ltd | Financial services | 2025 |
| Route 2 Medical Ltd | Health & social care | 2023 |
| Route 2 Secure Ltd | Administrative & support | 2025 |
| ROW Town Rangers Limited | Arts & recreation | 2026 |
| RR Arthur Holding Group Limited | Financial services | 2026 |
| Rracos Audio Services Ltd | Information & communication | 2023 |
| RRE Operations Ltd | Professional & scientific | 2023 |
| RS Commissioning Services UK Ltd | Professional & scientific | 2019 |
| RS Imports Ltd | Wholesale & retail | 2024 |
| Rs&H Electrical Ltd | Construction | 2023 |
| RT Glass Design Limited | Construction | 2007 |
| RT KIT Ltd | Wholesale & retail | 2020 |
| Run Qian Limited | Wholesale & retail | 2025 |
| Rusamenda Ltd | Professional & scientific | 2020 |
| Rushmon (Ashley Road) Ltd | Construction | 2024 |
| Rushmon (Brighton Road) Limited | Construction | 2021 |
| Rushmon (Brooklands Road) Limited | Construction | 2021 |
| Rushmon (Chessington Road) Limited | Construction | 2022 |
| Rushmon (LCC) Limited | Construction | 2022 |
| Rushmon (Molesey) Ltd | Construction | 2021 |
| Rushmon (Parker Collins) Ltd | Construction | 2021 |
| Rushmon (Ruxley Lane) Ltd | Construction | 2021 |
| Rushmon Limited | Construction | 1973 |
| Rushmon Prime Homes Ltd | Construction | 2025 |
| Rushmon Urban Homes Ltd | Construction | 2024 |
| Russ Hegarty Associates Limited | Professional & scientific | 2011 |
| Rusty Ltd | Professional & scientific | 2024 |
| Rydens Road Residents Management Company Limited | Households | 2008 |
| Ryebrook Advisory Ltd | Professional & scientific | 2026 |
| S Capital Holdings Ltd | Professional & scientific | 2017 |
| S G S Developments Limited | Construction | 1996 |
| S J Benson Estates Limited | Real estate | 2011 |
| S&D Construction Ltd | Construction | 2022 |
| S&Rm Limited | Professional & scientific | 2018 |
| S. Anderson Logistics Ltd | Transport & logistics | 2023 |
| S. Barnard Associates Limited | Information & communication | 2003 |
| S/: SEL Limited | Wholesale & retail | 2016 |
| Safana Jewellery Ltd | Wholesale & retail | 2022 |
| Safari Limited | Wholesale & retail | 1996 |
| Safekeep Storage Ltd | Transport & logistics | 2025 |
| Saffir Dental Ltd | Health & social care | 2023 |
| Sakura (Designs) Limited | Hospitality | 2024 |
| Samara James the Jewellers Ltd | Wholesale & retail | 2026 |
| Sam’S JET Wash Services Limited | Administrative & support | 2025 |
| Sanders Tax Consulting Ltd | Professional & scientific | 2021 |
| Sandra Porter HR Services Ltd | Administrative & support | 2016 |
| Sapphire Valley Ltd | Wholesale & retail | 2026 |
| Sarah Jones Marketing Ltd | Professional & scientific | 2019 |
| Sarmo Holdings Ltd | Information & communication | 2023 |
| Sasa Green Capital Limited | Hospitality | 2021 |
| Saucywhiffs Ltd | Manufacturing | 2024 |
| Saunders Storage Solutions Limited | Wholesale & retail | 2018 |
| Sauven Marking Limited | Manufacturing | 2017 |
| Savvy Minds Ltd | Information & communication | 2016 |
| Savvy Small Ltd | Professional & scientific | 2018 |
| Scenic Filmcraft Limited | Construction | 2015 |
| Scentsational Collection Ltd | Manufacturing | 2026 |
| Scope D&I Limited | Public administration | 2025 |
| Scope Defence Services LP | | 2026 |
| Scotch Mist Property Limited | Real estate | 2021 |
| SD Electrical London Limited | Construction | 2016 |
| SDO Global T/As Aviobeads Ltd | Wholesale & retail | 2006 |
| SDV Property Group Limited | Real estate | 2025 |
| SDV Work Stays Limited | Real estate | 2025 |
| Seasons Services Ltd | Wholesale & retail | 2025 |
| Seba Building Limited | Construction | 2023 |
| Sedgemore Travel Ltd | Administrative & support | 2019 |
| Selbud Limited | Construction | 2023 |
| Sensory Smart Therapies Limited | Health & social care | 2025 |
| Sentinel Enterprises Ltd | Real estate | 2025 |
| Sentinel Investing Ltd | Financial services | 2025 |
| Seoulmates Ltd | Wholesale & retail | 2025 |
| Sergi Car Cleaning Ltd | Other services | 2018 |
| Service Charge Experts Ltd | Other services | 2026 |