| Ronnoc Contracts Ltd | Construction | 2022 |
| Roof to Ground Exteriors Ltd | Administrative & support | 2024 |
| Rookies Ltd | Hospitality | 2023 |
| Rooted Together Wellbeing Ltd | Other services | 2026 |
| Roots 2 Rise Therapy Ltd | Administrative & support | 2023 |
| Roots Empowerment Ltd | Education | 2025 |
| Roots Health and Cosmetics International Ltd | Wholesale & retail | 2022 |
| Roots POD Academy C.I.C. | Administrative & support | 2019 |
| Roots to Wellbeing CIC | Education | 2021 |
| Rosa Clean Ltd | Other services | 2016 |
| Rose Farm Estate Management Limited | Households | 2013 |
| Rose Yard Ltd | Health & social care | 2023 |
| Rose's Champions PVT Ltd | Health & social care | 2015 |
| Roseb Gardens RTM Company Limited | Households | 2023 |
| Rosedan Lomo Limited | Health & social care | 2016 |
| Rosegrace Legal Limited | Professional & scientific | 2024 |
| Rosemar Solutions Ltd | Information & communication | 2025 |
| Rosh Medical Services Ltd | Health & social care | 2024 |
| Rosyb Services Limited | Professional & scientific | 2023 |
| Rotar Interior Ltd | Construction | 2024 |
| Rotatest Limited | Wholesale & retail | 2006 |
| Rous Construction Ltd | Construction | 2021 |
| Rovex Limited | Wholesale & retail | 2025 |
| Roxanne Violet Hicks Ltd | Extraterritorial | 2022 |
| Roxene’S Hair and Beauty Supplies Ltd | Other services | 2013 |
| Roydon Accident Repairs Ltd | Wholesale & retail | 2026 |
| Roydon Mill Management Company Limited | Hospitality | 1993 |
| Roydon Packaging Limited | Manufacturing | 1974 |
| Royfoods Ltd | Wholesale & retail | 2023 |
| Roylodge Limited | Households | 1978 |
| ROZELIN28 Limited | Transport & logistics | 2026 |
| Rozi Express Limited | Wholesale & retail | 2024 |
| RP Building and Restoration Ltd | Construction | 2026 |
| RP Groundworks Limited | Construction | 2005 |
| RP Productions Group Limited | Financial services | 2018 |
| RPM House Ltd | Construction | 2024 |
| Rpms Enterprises Ltd | Administrative & support | 2025 |
| RRM Plumbing and Heating Limited | Construction | 2022 |
| RS Group Trading Limited | Wholesale & retail | 2022 |
| RS Groups Trading Limited | Wholesale & retail | 2022 |
| RS Hunter Limited | Transport & logistics | 2016 |
| RS33MEDIA Ltd | Information & communication | 2026 |
| RSC Commerce Ltd | Professional & scientific | 2026 |
| RSD Asset UK Ltd | Other services | 2015 |
| RSF Building Consultancy Ltd | Professional & scientific | 2025 |
| RSP MAX Ltd | Construction | 2017 |
| RSR Bodyworxx Limited | Manufacturing | 2021 |
| RT Development Holdings Limited | Financial services | 2025 |
| RT Kims Ltd | Health & social care | 2016 |
| RTB Groundworks Limited | Construction | 2018 |
| RTB Plant Hire Limited | Construction | 2023 |
| RTI Aviation Ltd | Other services | 2020 |
| RTI Family Office Group Ltd | Extraterritorial | 2014 |
| RTI Racing Ltd | Extraterritorial | 2014 |
| RTR Housing Limited | Real estate | 2025 |
| RTS Communications Limited | Information & communication | 2008 |
| Rubin Designs Ltd | Professional & scientific | 2018 |
| Ruby and Crest Limited | Wholesale & retail | 2026 |
| Ruby's Gardens Limited | Administrative & support | 2024 |
| Rudaf Medicals Limited | Health & social care | 2026 |
| Rufaro Group Ltd | Administrative & support | 2026 |
| Rukai Botanicals Limited | Wholesale & retail | 2025 |
| Rukky & Brent Healthcare Limited | Health & social care | 2023 |
| Run Grateful Ltd | Administrative & support | 2020 |
| Runo Medical UK Ltd | Health & social care | 2022 |
| Rushford Avenue (Management) Company Limited | Households | 1975 |
| Rushilili Limited | Administrative & support | 2025 |
| Rushnolimits Ltd | Wholesale & retail | 2026 |
| Ruskin Court (Winchmore Hill) RTM Company Limited | Households | 2010 |
| Rusosa Medical Ltd | Health & social care | 2023 |
| Russofs Ltd | Health & social care | 2025 |
| RV IT Services Ltd | Information & communication | 2023 |
| RV Lucking & SON Ltd | Construction | 2003 |
| RW Solutions Inc Limited | Information & communication | 2012 |
| RWC - Right Way Care Ltd | Public administration | 2024 |
| RWH Services Ltd | Financial services | 2018 |
| Ryben Talent Resources UK Ltd | Administrative & support | 2024 |
| Ryse Training Solutions Ltd | Education | 2025 |
| Rywel Construction Ltd | Construction | 2022 |
| RZQ Franchise UK Ltd | Wholesale & retail | 2026 |
| S & R DRY Cleaners Ltd. | Other services | 2017 |
| S D Prestige Ltd | Wholesale & retail | 2021 |
| S Harrison Building Services Limited | Construction | 2012 |
| S Horsley Holdings Ltd | Financial services | 2003 |
| S J Frederick & Sons Ltd | Agriculture & fishing | 2026 |
| S J Tinney Limited | Agriculture & fishing | 2024 |
| S K Associates-Uk- Limited | Real estate | 2019 |
| S R Poore Limited | Professional & scientific | 2020 |
| S&A Building Service Limited | Construction | 2016 |
| S&M Regal Ltd | Construction | 2026 |
| S&N Cleaning Services Ltd | Administrative & support | 2023 |
| S&P Build&Cons Ltd | Construction | 2023 |
| S&S Transports and Logistics Ltd | Transport & logistics | 2021 |
| S.A Network Consultants Ltd | Information & communication | 2014 |
| S.A Precision Engineering Ltd | Manufacturing | 2016 |
| S.D. Sullam Limited | Extraterritorial | 1939 |
| S.M.Art Cladding & SFS Ltd | Construction | 2023 |
| SA & N Services Limited | Professional & scientific | 2012 |
| SA 46 Ltd | Real estate | 2020 |
| SA Foundation CIC | Education | 2024 |