| Rosie's Cafe & Deli Ltd | Hospitality | 2024 |
| Rosina Street Management Company Ltd | Households | 2016 |
| Roslin Way Allotments Ltd | Arts & recreation | 2020 |
| Ross Digital Media Ltd | Professional & scientific | 2026 |
| Rossbacco Ltd | Real estate | 2019 |
| Rota Support Ltd | Administrative & support | 2024 |
| Route 2 Trade Ltd | Education | 2026 |
| Rovi Biotech Limited | Wholesale & retail | 2014 |
| ROW 9 Productions Ltd | Information & communication | 2022 |
| Rowan Court Freehold Management Limited | Professional & scientific | 2004 |
| Rowden & Partners Limited | Construction | 2002 |
| ROX Marketing Ltd | Hospitality | 2024 |
| Roxburgh Place (Bickley) Management Company Limited | Households | 2013 |
| ROY Cheng Studio Ltd | Professional & scientific | 2024 |
| Royal Archer (New Cross) RTM Company Limited | Real estate | 2017 |
| Royal Court (Mottingham) Management Company Limited | Real estate | 1993 |
| RP10 Consulting Limited | Information & communication | 2011 |
| Rpgms Consulting Limited | Information & communication | 2023 |
| Rpjm Limited | Wholesale & retail | 2026 |
| RPM Management Limited | Manufacturing | 2017 |
| RR Facades Homes Ltd | Real estate | 2023 |
| RR Facades Ltd | Construction | 2020 |
| RRD Medical Ltd | Public administration | 2024 |
| RS Bookkeeping & Accounting Ltd | Professional & scientific | 2020 |
| RS Cost Consulting Limited | Professional & scientific | 2026 |
| RSE Global Group Ltd | Manufacturing | 2025 |
| RSN Consulting Limited | Information & communication | 2014 |
| RSR Homes Limited | Real estate | 2003 |
| Rsrm Holdings Ltd | Wholesale & retail | 2020 |
| RSS Holdco Ltd | Administrative & support | 2024 |
| RT & DT Consulting Limited | Professional & scientific | 2025 |
| RTI Consulting Solutions Ltd | Information & communication | 2022 |
| RU & RU Management Ltd | Extraterritorial | 2024 |
| Ruba Caterers Ltd | Hospitality | 2018 |
| Ruban Perfect Chicken Ltd | Hospitality | 2021 |
| Ruby Interims Limited | Professional & scientific | 2005 |
| Ruby Spa Ltd | Other services | 2019 |
| Ruche Property Limited | Households | 2024 |
| Rule of Three Limited | Arts & recreation | 1996 |
| Rumblo Studios Ltd | Information & communication | 2026 |
| Running Hare Restaurants Limited | Hospitality | 2020 |
| Runtingz Inc Limited | Health & social care | 2014 |
| Rupert House RTM Company Limited | Households | 2010 |
| Rusinov Ltd | Transport & logistics | 2017 |
| Rusjon (UK) Limited | Real estate | 1999 |
| Russell Financial Management Ltd | Professional & scientific | 2025 |
| Russell London Enterprises Ltd | Wholesale & retail | 2020 |
| Russell London Estates Ltd. | Administrative & support | 2016 |
| Russell Mews Management (Paddock Wood) Ltd | Real estate | 2004 |
| Russells A-G Limited | Professional & scientific | 2000 |
| Rust-Andrews Investments Limited | Real estate | 2016 |
| Ruta Construction Ltd | Construction | 2025 |
| Rutland Trinity Ltd | Real estate | 2019 |
| Ruzik Ltd | Construction | 2021 |
| RV HR Consulting Ltd | Information & communication | 2025 |
| RW Advisory Ltd | Administrative & support | 2019 |
| RW Painting, Decorating & Property Maintenance Limited | Construction | 2018 |
| RWS & EA Limited | Construction | 2002 |
| RWS Environmental Consultancy Ltd | Other services | 2011 |
| Ryan J Watts Limited | Professional & scientific | 2025 |
| Ryancameron Limited | Administrative & support | 2016 |
| RYE Plant Hire Limited | Construction | 1994 |
| Ryjs Consultancy Limited | Professional & scientific | 2018 |
| Rykard Group Ltd | Real estate | 2025 |
| Rylgateway SCV RTM Company Limited | Real estate | 2022 |
| Rylgateway TPC RTM Company Limited | Real estate | 2022 |
| S & D Commercial Properties Limited | Professional & scientific | 2015 |
| S & J Safety Limited | Administrative & support | 2018 |
| S & K Scrowther Limited | Other services | 2002 |
| S & M Flooring Contractors Limited | Households | 2007 |
| S Akuffo and Co Limited | Professional & scientific | 2023 |
| S Conway Limited | Financial services | 2015 |
| S Dutton Training Services Ltd | Transport & logistics | 2026 |
| S K Transport & Car Sales Ltd | Wholesale & retail | 2025 |
| S Landell Holdings Limited | Extraterritorial | 2022 |
| S T London Extensions and Lofts Ltd | Construction | 2021 |
| S W Snagging Contractors Ltd | Construction | 2023 |
| S World UK Limited | Transport & logistics | 2020 |
| S&D Tyres and Servicing Limited | Wholesale & retail | 2024 |
| S&G Partners Limited | Transport & logistics | 2021 |
| S&L Elite Exteriors Ltd | Administrative & support | 2026 |
| S&M Express Ltd | Transport & logistics | 2025 |
| S-Class Chauffeur Services Limited | Transport & logistics | 2012 |
| S. Barrett Services Limited | Health & social care | 2015 |
| S. Padley Limited | Hospitality | 2010 |
| S.A.O Investments Limited | Real estate | 2023 |
| S.E. Wright & SON (Properties) Limited | Real estate | 1958 |
| S.F.S. (Southern) Limited | Real estate | 1985 |
| S.K. Landscapes & Maintenance Ltd | Construction | 1999 |
| S.Norman Trade Ltd | Wholesale & retail | 2025 |
| S.Steventon & Co.Limited | Construction | 1955 |
| S2S Properties Ltd | Real estate | 2016 |
| SA Therapy Ltd | Health & social care | 2025 |
| SAB Black Therapy Network Limited | Education | 2021 |
| SAB Counselling Services Limited | Health & social care | 2021 |
| Saber Mateen Ltd | Transport & logistics | 2025 |
| Sabharwal Properties Ltd | Real estate | 2020 |
| Sabre Air Conditioning Limited | | 1981 |
| Sachdev Sons Ltd | Other services | 2024 |
| Sacred Healing With Reena Ltd. | Wholesale & retail | 2026 |