| Ripley Consulting Limited | Professional & scientific | 2015 |
| Riskqy Ltd | Information & communication | 2024 |
| Ritual Network Ltd | Information & communication | 2016 |
| River Precision Engineering Limited | Manufacturing | 1998 |
| Riverheights Property Ltd | Real estate | 2017 |
| RJG Rope Access Ltd | Construction | 2019 |
| RJM Security Ltd | Administrative & support | 2025 |
| RK Imaging Ltd | Health & social care | 2019 |
| Rlastrong Ltd | Transport & logistics | 2022 |
| Rlmanagers Limited | Hospitality | 2025 |
| RLT BED Ltd | Health & social care | 2026 |
| Rmautowerks Limited | Wholesale & retail | 2020 |
| RMJ LET Properties Ltd | Real estate | 2025 |
| RMJ Prime Spaces Ltd | Real estate | 2025 |
| RMR Garage Ltd | Wholesale & retail | 2019 |
| RMT Medical Ltd | Health & social care | 2019 |
| RN Property Management Ltd | Construction | 2018 |
| RNR Home Improvements Limited | Construction | 2022 |
| RNR Renewables Ltd | Construction | 2024 |
| RNS Wealth Partners Limited | Administrative & support | 2023 |
| RO Consulting Agency Ltd | Professional & scientific | 2021 |
| RO M&D Transport Ltd | Transport & logistics | 2023 |
| Road Traffic Solutions Holding Limited | Professional & scientific | 2018 |
| Road Traffic Solutions Limited | Administrative & support | 2004 |
| Roadcone Limited | Construction | 2020 |
| Roadtransport Ltd | Transport & logistics | 2025 |
| ROB Mcelnea Racing Limited | Arts & recreation | 1994 |
| ROB Transport 10 Ltd | Transport & logistics | 2025 |
| Robert E Russell Limited | Construction | 2019 |
| Robert Neasham Limited | Hospitality | 2010 |
| Roberton Medical Limited | Health & social care | 2023 |
| Roberton Radiology Ltd | Health & social care | 2020 |
| Robertsons (E&A) Ltd | Wholesale & retail | 2014 |
| Robinson Hallsworth Accountancy Services Limited | Professional & scientific | 2024 |
| Rocket Teachers Ltd | Administrative & support | 2025 |
| Rockscape Farms Ltd | Agriculture & fishing | 1997 |
| Rockscape Habitats Limited | Hospitality | 2022 |
| ROE Developments Holdings Limited | Administrative & support | 2020 |
| Rogan Radiology Reporting Ltd | Health & social care | 2024 |
| Rogarcourt Limited | Professional & scientific | 1989 |
| ROJ Bakery Ltd | Manufacturing | 2018 |
| Rojo Developments Limited | Real estate | 2024 |
| Roller Doors Direct Limited | Construction | 2019 |
| Romania Corner Shop Ltd | Wholesale & retail | 2026 |
| Romih Transport Ltd | Transport & logistics | 2020 |
| Ronald Holdings Ltd | Real estate | 2025 |
| Rookery Attire Online Limited | Wholesale & retail | 2023 |
| Rookie Autocare Ltd | Wholesale & retail | 2021 |
| Roomtel Ltd | Real estate | 2012 |
| Ropes and Rescue Ltd | Administrative & support | 2025 |
| Rosebee Events Limited | Administrative & support | 2021 |
| Rounce Fabrications Ltd | Other services | 2018 |
| Rowan Education Services Ltd | Education | 2022 |
| Rowan Tree UK Properties Ltd | Real estate | 2026 |
| Rowan’S Rigging&Lifting Ltd | Construction | 2026 |
| Rowbrocke Limited | Real estate | 1981 |
| Rowland Road Developments Limited | Real estate | 2002 |
| Roxby Heating Engineers Ltd | Construction | 2019 |
| Roxby Saddlers Limited | Professional & scientific | 2014 |
| ROY Nicholson Limited | Construction | 2009 |
| RPE Parts Zone Ltd | Wholesale & retail | 2025 |
| RPG Solutions Ltd | Transport & logistics | 2015 |
| Rpjp Property Limited | Real estate | 2018 |
| RPP Medical Limited | Health & social care | 2024 |
| RRG Limited | Water & waste | 2017 |
| RRR & RN Ltd | Wholesale & retail | 2023 |
| RRR Trans Ltd | Transport & logistics | 2019 |
| RS Driver Ltd | Transport & logistics | 2024 |
| RS Safety and Security Limited | Administrative & support | 2025 |
| RS Security Services Limited | Administrative & support | 2016 |
| RS Ultrasound Services Ltd | Health & social care | 2022 |
| Rsbarbershop Ltd | Other services | 2026 |
| Rsbse Limited | Information & communication | 2011 |
| RSS Plumbing & Heating Limited | Construction | 2021 |
| Rssmb Developments Limited | Real estate | 2015 |
| Ruben Daria Ltd | Transport & logistics | 2026 |
| Rubicontec Limited | Professional & scientific | 2024 |
| Rubiks Inclusive Counselling Interventions CIC | Health & social care | 2022 |
| Ruhan Enterprise Ltd | Wholesale & retail | 2024 |
| Running Bear Ltd | Health & social care | 2019 |
| Rustic Construction Limited | Construction | 1999 |
| Ryden Outreach Ltd | Education | 2026 |
| Ryli Heat Ltd | Construction | 2019 |
| Rywad Holdings Limited | Financial services | 2025 |
| S & a Anaesthetics Ltd | Health & social care | 2019 |
| S & B Plumbing & Joinery Limited | Construction | 2020 |
| S & B Properties Scunthorpe Limited | Other services | 2018 |
| S & B Property Maintenance (Scunthorpe) Limited | Construction | 2018 |
| S & C Wendy's Limited | Administrative & support | 2019 |
| S & E Engineering (Scunthorpe) Limited | Other services | 1997 |
| S & E Mechanical and Fabrication Services Limited | Manufacturing | 2001 |
| S & G Juices Limited | Real estate | 2017 |
| S & J Vessey Properties Ltd | Real estate | 2021 |
| S & K Estate Ltd | Real estate | 2022 |
| S & S Tan-Seekers Limited | Administrative & support | 2003 |
| S Chawla Limited | Health & social care | 2024 |
| S Jackson & Sons Holdings Limited | Agriculture & fishing | 2014 |
| S Jackson & Sons Limited | Agriculture & fishing | 2014 |
| S Kumar Diagnostics Ltd | Health & social care | 2016 |
| S Laffey Electrical Limited | Professional & scientific | 2017 |