| RA Capital (NW) Limited | Real estate | 2023 |
| RA Chester Road Limited | Real estate | 2021 |
| RA Developments (NW) Limited | Real estate | 2021 |
| RA London Road Limited | Real estate | 2019 |
| RA Macclesfield Limited | Real estate | 2021 |
| RA Management (NW) Limited | Real estate | 2021 |
| RA Project 10X Limited | Real estate | 2023 |
| RA Project 2X Limited | Real estate | 2021 |
| RA Project 4X Limited | Real estate | 2022 |
| RA Project 5X Limited | Real estate | 2022 |
| RA Project 6X Limited | Real estate | 2022 |
| RA Project 7X Limited | Real estate | 2023 |
| RA Project 8X Limited | Real estate | 2023 |
| RA Project 9X Limited | Real estate | 2023 |
| RA Properties (NW) Limited | Real estate | 2021 |
| Raab Holdings Limited | Financial services | 2025 |
| RAB Consulting Services Ltd | Wholesale & retail | 2021 |
| Race Day Collective Ltd | Wholesale & retail | 2025 |
| Racehill (Services) Limited | Households | 1975 |
| Rachh Consultancy Limited | Professional & scientific | 2017 |
| Rachh Limited | Administrative & support | 2015 |
| Radbakes Ltd | Health & social care | 2017 |
| Radcliffe Procurement Associates Limited | Administrative & support | 2022 |
| Radco 1 Limited | Professional & scientific | 2025 |
| Radco 2 Limited | Professional & scientific | 2025 |
| Radco 3 Limited | Professional & scientific | 2025 |
| Radford Advisory Limited | Professional & scientific | 2022 |
| Radial Software Limited | Information & communication | 2007 |
| Radiant Heating Solutions (Bolton) Limited | Construction | 2023 |
| Radius Consulting Engineers Limited | Professional & scientific | 2020 |
| Radix Health Limited | Health & social care | 2015 |
| Radix Trading UK Limited | Financial services | 2026 |
| Radleigh Homes (Hudsons Way) Limited | Professional & scientific | 2004 |
| Radley Legal Limited | Professional & scientific | 2023 |
| Radmehr & Co Ltd | Real estate | 2025 |
| Radnor Solutions Limited | Administrative & support | 2019 |
| Rads Group Ltd | Professional & scientific | 2019 |
| Radscan Ltd | Health & social care | 2017 |
| RAE Developments Ltd | Construction | 2026 |
| Rae-Evans Ventures Limited | Professional & scientific | 2023 |
| Rafter Associates Limited | Education | 2017 |
| RAG Investments Limited | Financial services | 2012 |
| Raghu Ltd | Health & social care | 2012 |
| Rahman Opticals Ltd | Health & social care | 2021 |
| Raia Health Limited | Health & social care | 2023 |
| Rain Sytems Limited | Professional & scientific | 2024 |
| Rainmaker Holdings Limited | Financial services | 2018 |
| Rains & SON Limited | Hospitality | 1998 |
| Rainy City Creative Limited | Arts & recreation | 2025 |
| Rainy City Roofers Limited | Construction | 2026 |
| Raise and Replenish Ltd | Manufacturing | 2022 |
| Rakt Group Limited | Information & communication | 2025 |
| Ralimpex Limited | Wholesale & retail | 2025 |
| RAM Thoraks Consultancy (RTC ) Ltd | Health & social care | 2020 |
| Ramara Limited | Real estate | 2025 |
| Rameto Locums Limited | Health & social care | 2009 |
| Ramina Properties Ltd | Real estate | 2021 |
| Ramisurgery Ltd | Health & social care | 2026 |
| Ramjac Limited | Information & communication | 2017 |
| Ramrachia & Partners Ltd | Professional & scientific | 2025 |
| Ramsdens Rooms Limited | Construction | 2020 |
| Ramzitech Engineering Services Limited | Professional & scientific | 2019 |
| Ranby Outdoor Living Limited | Wholesale & retail | 2024 |
| Rane Limited | Health & social care | 2023 |
| Range and Field Ltd. | Wholesale & retail | 2018 |
| Ranjeet Engineering Limited | Administrative & support | 2014 |
| Rank Events Limited | Transport & logistics | 2025 |
| Rapide Payment Solutions Limited | Financial services | 2014 |
| Rapix Connect Limited | Information & communication | 2024 |
| Rapytl Limited | Financial services | 2024 |
| Rashyn Solutions Ltd | Health & social care | 2022 |
| Rasrizq Ltd | Health & social care | 2025 |
| Rasta Roots Limited | Wholesale & retail | 2026 |
| Ratnarajah Medical Services Limited | Health & social care | 2014 |
| Ratv Limited | Administrative & support | 2015 |
| Rauniar Developments Ltd | Real estate | 2016 |
| Rauniar Homes Ltd | Real estate | 2020 |
| Rauniar Investments Ltd | Real estate | 2015 |
| Rauniar Properties Ltd | Real estate | 2017 |
| Ravana Group Limited | Hospitality | 2023 |
| Raven Mount Group Limited | Real estate | 2008 |
| Raven Mount Limited | Real estate | 2003 |
| Raven Mount Services Company Limited | Construction | 1898 |
| Raven Russia Property Advisors Limited | Real estate | 2005 |
| Ravenscroft Homes N.W. Limited | Construction | 2001 |
| Ravi Chandarana Consulting Limited | Professional & scientific | 2023 |
| Ravis Living Ltd | Wholesale & retail | 2022 |
| RAW Payment Insights Ltd | Professional & scientific | 2024 |
| Rawlings Heritage Properties Limited | Water & waste | 2023 |
| Rawlinson Business Services Limited | Professional & scientific | 2010 |
| RAY Podmore Contract Services Limited | Construction | 2010 |
| Raycast Technologies Ltd. | Information & communication | 2020 |
| Rayyan Zayan Limited | Real estate | 2025 |
| Raza & Co Limited | Wholesale & retail | 2000 |
| Raza Consultants Ltd | Health & social care | 2012 |
| RB Dental Group Limited | Health & social care | 2025 |
| RB Investco Limited | Professional & scientific | 2023 |
| RB Trading Group Limited | Real estate | 2026 |
| RBZ Consulting Ltd | Professional & scientific | 2024 |
| RC Oncology Ltd | Health & social care | 2022 |