| RES Consulting Limited | Information & communication | 2009 |
| Resume Library Limited | Administrative & support | 2013 |
| Resus Rangers Ltd | Education | 2019 |
| Retail Projects Ltd | Professional & scientific | 2024 |
| Revitalise Rooms Limited | Other services | 2023 |
| Revon LLP | | 2025 |
| Revopsys Ltd | Professional & scientific | 2023 |
| Reynolds Design Ltd | Professional & scientific | 2018 |
| Rezident Consulting Ltd. | Information & communication | 2014 |
| Rfwhk Limited | Information & communication | 2023 |
| RGM3B Limited | Real estate | 2018 |
| RGW Financial Services Ltd | Financial services | 2019 |
| Rhino Engineering (UK) Limited | Manufacturing | 2005 |
| Rhodes Vehicle Management Solutions Ltd | Transport & logistics | 2026 |
| Rhys’S Pieces Ltd | Wholesale & retail | 2024 |
| Rigorous Limited | Information & communication | 2026 |
| RIO Homes (Sandringham) Limited | Construction | 2016 |
| RIO Homes Victoria Limited | Construction | 2016 |
| Riot Promotions LLP | | 2021 |
| Risk Analysis Consulting Ltd | Information & communication | 2023 |
| River Meadows (Blackwater) Management Company Limited | Households | 2004 |
| Riverside Management Alton Limited | Real estate | 2007 |
| Riverstock Solutions Limited | Transport & logistics | 2015 |
| RJF Decorating & Design Limited | Construction | 2025 |
| RJN Business Consultancy Limited | Professional & scientific | 2016 |
| RK Communications Limited | Professional & scientific | 2014 |
| RK Services PVT Ltd | Professional & scientific | 2024 |
| RLE Financial Solutions Ltd | Professional & scientific | 2016 |
| RME Events Limited | Extraterritorial | 2006 |
| RMF Products Ltd | Wholesale & retail | 2024 |
| Robert DAW Golf Ltd | Arts & recreation | 2019 |
| Rochford House (Farnborough) RTM Company Ltd | Households | 2021 |
| Rocks N Reiki Ltd | Wholesale & retail | 2025 |
| ROE Automotive Engineering Ltd | Manufacturing | 2014 |
| Romiro Law Limited | Professional & scientific | 2023 |
| Rooferholics Limited | Construction | 2026 |
| ROOM2MOVE Limited | Real estate | 2002 |
| Roscommon Properties Ltd | Real estate | 2009 |
| Rose David Property Ltd | Real estate | 2025 |
| Rose Taylor Consulting Limited | Professional & scientific | 1991 |
| Rosewood Planning Ltd | Information & communication | 2025 |
| Rosier Consulting Limited | Professional & scientific | 1999 |
| Rotascan Ltd | Professional & scientific | 2013 |
| Roupcycle Ltd | Water & waste | 2015 |
| Roxborough Properties Limited | Real estate | 2022 |
| RPM Financial Consultancy Limited | Professional & scientific | 2014 |
| Rrevolution Consulting Limited | Professional & scientific | 2023 |
| RRT Solutions Limited | Professional & scientific | 2021 |
| RS13 Investments Ltd | Real estate | 2025 |
| RST Consulting (UK) Limited | Information & communication | 2012 |
| RT Technical Ltd | Information & communication | 2008 |
| Ruby Jones Home Limited | Wholesale & retail | 2019 |
| Ruca Path Ltd | Professional & scientific | 2026 |
| Rusint Property Limited | Real estate | 1971 |
| Ruth Kinaci Consulting Limited | Information & communication | 2016 |
| Rutherford Associates Limited | Extraterritorial | 2014 |
| RW Commercial Catering Engineers Limited | Professional & scientific | 2022 |
| Ryft Technology Limited | Wholesale & retail | 2024 |
| Ryker Vanguard Ltd | Professional & scientific | 2022 |
| S & M Fish & Chip Shops Limited | Hospitality | 2008 |
| S & S Project Management Ltd | Arts & recreation | 2025 |
| S & V Construction Ltd | Construction | 2015 |
| S Bellchambers Ltd | Professional & scientific | 2026 |
| S&A Corporate Ltd | Transport & logistics | 2023 |
| S.L. Graphic Design Limited | Professional & scientific | 1997 |
| S2A Consulting Ltd | Information & communication | 2019 |
| S2C Solutions Limited | Information & communication | 2019 |
| S4E Capital Ltd | Information & communication | 2025 |
| S4U Solutions Limited | Extraterritorial | 2023 |
| Sable & Argent Limited | Professional & scientific | 2009 |
| Sacellum Limited | Real estate | 2004 |
| Safari Zone Ltd | Wholesale & retail | 2024 |
| Safefoot 21 Limited | Real estate | 2020 |
| Safelight Care Ltd | Health & social care | 2022 |
| Sahara Africa Group Limited | Wholesale & retail | 2023 |
| Sailec Ltd | Professional & scientific | 2017 |
| Salamandar Gifts Limited | Wholesale & retail | 2007 |
| Salisbury Apartments Limited | Real estate | 2004 |
| Salmon Social Ltd | Information & communication | 2024 |
| Sandringham Suites & Apartments Limited | Hospitality | 2009 |
| Sandstone International Limited | Financial services | 2025 |
| Sandy Lane (Cove) Management Company Ltd | Construction | 2008 |
| Saniro Solutions Ltd | Information & communication | 2012 |
| Santana Media Limited | Professional & scientific | 2022 |
| Sara Solutions Ltd | Wholesale & retail | 2018 |
| Sarah Shrubsall Nutrition Limited | Health & social care | 2020 |
| Saranya Dance Academy Ltd | Education | 2025 |
| Sarco Designs Limited | Professional & scientific | 1996 |
| SAS Pizza Limited | Hospitality | 2009 |
| SAS Software Technologies Ltd | Information & communication | 2015 |
| Sasc Coaching & Consulting Limited | Professional & scientific | 2017 |
| Sase Cleaning Limited | Administrative & support | 2024 |
| Sashes Limited | Administrative & support | 1995 |
| Satin Hair Design Ltd | Other services | 2010 |
| Satnam Trading Ltd | Wholesale & retail | 2024 |
| Saxon Consulting Ltd | Information & communication | 2015 |
| SBH Workforce Ltd | Administrative & support | 2020 |
| Scenario One Ltd | Administrative & support | 2017 |
| Scorchtech Ltd | Information & communication | 2022 |
| Scott Financial Limited | Financial services | 2003 |