| Rockland Homes Group Ltd | Construction | 2023 |
| Rockland Property Group Ltd | Real estate | 2023 |
| Rockliffe Investments Limited | Professional & scientific | 2014 |
| Rocktapus Ltd | Information & communication | 2020 |
| Rodeo PR Limited | Professional & scientific | 2026 |
| Rodney Michael Herron Limited | Extraterritorial | 2024 |
| Rogers Couriers Ltd | Transport & logistics | 2018 |
| Rogers Properties (North East) Limited | Real estate | 2020 |
| Roker END Cafe Ltd | Hospitality | 2023 |
| Rollinsonmt Limited | Professional & scientific | 2026 |
| Roman Pizza Ltd | Hospitality | 2026 |
| Romangate Heating Contractors Ltd | Construction | 2024 |
| Romanian Care Alliance CIC | Other services | 2025 |
| Romanian Cultural Heritage C.I.C. | Administrative & support | 2020 |
| Romantfs Ltd | Professional & scientific | 2023 |
| Ronald Goodman (Linthorpe) Limited | Professional & scientific | 1963 |
| Ronson Surveying Limited | Professional & scientific | 2007 |
| Rooba JO Ltd | Wholesale & retail | 2024 |
| Rooban J Ltd | Real estate | 2025 |
| Roobs JO Ltd | Construction | 2025 |
| Room 2 Skincare, Beauty & Holistic Therapies Ltd | Other services | 2020 |
| Room 21 Limited | Hospitality | 2020 |
| Roomrent.Com Ltd | Real estate | 2024 |
| Rootstead Ltd | Real estate | 2025 |
| Ropner Park Ltd | Hospitality | 2024 |
| Rosaj Properties Ltd | Real estate | 2025 |
| Rosamond House (EC) Limited | Real estate | 2023 |
| Rosary Gardens Property Limited | Real estate | 2023 |
| Rose Education Foundation Limited | Education | 2007 |
| Roseberry Finance & Accounting Ltd | Professional & scientific | 2018 |
| Roseberry Offshore Services Ltd | Mining & quarrying | 2023 |
| Rosebud Accountancy Ltd | Professional & scientific | 2024 |
| Roseden Properties Limited | Households | 2020 |
| Rosemead Estates Ltd | Hospitality | 2022 |
| Rosewood Construction Ltd | Construction | 2017 |
| Roseworth Dental Centre Ltd | Health & social care | 2026 |
| Roshaaz Tech Limited | Information & communication | 2019 |
| Ross Engineering Management Limited | Professional & scientific | 2016 |
| Ross Marshall Limited | Information & communication | 2014 |
| Ross Road Garage MOT Limited | Wholesale & retail | 2013 |
| Roundtablehq Ltd | Information & communication | 2013 |
| Rovin Consultants Limited | Mining & quarrying | 2008 |
| Rowan Garden Services Ltd | Other services | 2020 |
| ROWLEY4 Ltd | Real estate | 2023 |
| Roxsclothing Ltd | Wholesale & retail | 2021 |
| Rp.Electricalcompany Ltd | Construction | 2024 |
| RPG Teesside Ltd | Wholesale & retail | 2025 |
| RR Estates Management Ltd | Real estate | 2025 |
| RR Offshore Marine Services Limited | Construction | 2024 |
| RR Shine Ltd | Wholesale & retail | 2025 |
| RRLOGISTICS18 Ltd | Transport & logistics | 2026 |
| RS 886 Limited | Hospitality | 2025 |
| RS Diagnostics Ltd | Health & social care | 2011 |
| RS Industrial Services Limited | Professional & scientific | 2001 |
| Rsex Ltd. | Wholesale & retail | 2016 |
| RSM Solutions (NE) Limited | Extraterritorial | 2008 |
| RSW Cocktail Bars Ltd | Hospitality | 2021 |
| RSW Micro Pubs Ltd | Hospitality | 2020 |
| RTB Offshore Services Ltd | Professional & scientific | 2011 |
| RTS Group (NE) Limited | Administrative & support | 2016 |
| RTS Joinery and Shopfitting Specialists Limited | Construction | 2009 |
| RU Training - Industrial Specialists Ltd | Education | 2012 |
| RUA Carlota Ltd | Manufacturing | 2020 |
| Ruby Construction Supplies Limited | Other services | 2011 |
| Ruddle AP Medical Ltd | Health & social care | 2022 |
| Rudjarvy Limited | Hospitality | 2018 |
| RUE Investment Group Ltd | Professional & scientific | 2022 |
| Ruff Group Ltd | Wholesale & retail | 2025 |
| Rundle Homes Ltd | Professional & scientific | 2025 |
| Rural Business Network Limited | Other services | 2019 |
| Russell LEE Ltd | Construction | 2015 |
| RV Offshore Ltd | Professional & scientific | 2024 |
| RW Design Ltd | Construction | 2019 |
| RWB Group UK Ltd | Water & waste | 2019 |
| Ryan Connelly Property Limited | Real estate | 2024 |
| Ryan Harbron Recruitment Consultancy Ltd | Administrative & support | 2024 |
| Ryan Madden Logistics Ltd | Transport & logistics | 2025 |
| Ryanlogistic Ltd | Transport & logistics | 2025 |
| Ryder Motor Credit Limited | Administrative & support | 2025 |
| Ryze Agency Ltd. | Information & communication | 2015 |
| Ryze Collective Ltd | Information & communication | 2024 |
| Ryze Global Ltd | Information & communication | 2024 |
| RZ Planning Solutions Ltd | Professional & scientific | 2026 |
| S & S Beauty Ltd | Other services | 2019 |
| S & S Cooling Services Ltd | Manufacturing | 2023 |
| S & S Skip Hire Ltd | Water & waste | 2025 |
| S & T Landscapes (NE) Ltd | Administrative & support | 2025 |
| S & Z Group Limited | Wholesale & retail | 2024 |
| S Adamson Ltd | Construction | 2023 |
| S Adhd Assessments Ltd | Health & social care | 2024 |
| S Boyes Engineering Ltd | Professional & scientific | 2009 |
| S Briscoe Transport Ltd | Transport & logistics | 2022 |
| S C B Limited | Construction | 1998 |
| S C Teak Ltd | Wholesale & retail | 2019 |
| S E Geotechs Ltd | Professional & scientific | 2024 |
| S Ferguson Solutions Ltd | Information & communication | 2016 |
| S G Rail 2023 Limited | Construction | 2023 |
| S L Rope Access Services Ltd | Professional & scientific | 2026 |
| S L Supplies Ltd | Wholesale & retail | 2026 |
| S Levick Offshore Services Ltd | Professional & scientific | 2025 |