| Questbrook Energy Limited | Energy | 2012 |
| Quezon Software Consulting Ltd | Information & communication | 2017 |
| Quick Pro Ltd | Transport & logistics | 2026 |
| Quick Skips Limited | Water & waste | 2020 |
| Quick Will Limited | Financial services | 2017 |
| Quicksilver Solutions Limited | Information & communication | 2022 |
| Quiet River Holdings Ltd | Financial services | 2025 |
| Quinn's Heating Limited | Construction | 2003 |
| Quoin Property Consulting Limited | Professional & scientific | 2014 |
| R & M Building & Groundwork Limited | Construction | 2010 |
| R Bautista Ltd | Information & communication | 2018 |
| R Heseltine Consulting Limited | Information & communication | 2016 |
| R Human Resources Limited | Administrative & support | 2021 |
| R K Bearings Limited | Financial services | 2013 |
| R Lewis Consulting Ltd | Administrative & support | 2025 |
| R M H Electrical Services Limited | Construction | 1992 |
| R M Hall Limited | Construction | 2012 |
| R Mcmillan Ltd | Information & communication | 2018 |
| R Nolan Solutions Ltd | Professional & scientific | 2022 |
| R S Leisure (Dorset) Limited | Hospitality | 2012 |
| R S Storage & Distribution Limited | Transport & logistics | 2025 |
| R Speed Tuning Ltd | Wholesale & retail | 2014 |
| R. C. Hutchings Ltd. | Construction | 2005 |
| R. Samson & Sons Ltd. | Transport & logistics | 2002 |
| R.And S.Blair Limited | Real estate | 1957 |
| R.K. Holman Limited | Wholesale & retail | 1976 |
| R.M.M Test Engineering Ltd | Professional & scientific | 2016 |
| R.S Technologists Ltd | Information & communication | 2009 |
| R.W. Newman Properties Limited | Construction | 1981 |
| R1 Roofing Ltd | Construction | 2026 |
| R2M Holdings Limited | Financial services | 2025 |
| R5 Resourcing Ltd | Information & communication | 2025 |
| RA2050 Limited | Professional & scientific | 2019 |
| Rachael DHT Ltd | Health & social care | 2023 |
| Rachel Constantine Limited | Professional & scientific | 2015 |
| RAD Electrical Services Ltd | Construction | 2023 |
| RAD Systems Limited | Information & communication | 2017 |
| Radical Autoworks Ltd | Wholesale & retail | 2019 |
| Radical Geek Technology Solutions Limited | Information & communication | 2021 |
| Radical Ltd | Extraterritorial | 2015 |
| Radio Wimborne Limited | Information & communication | 2013 |
| Radtenna Ltd | Professional & scientific | 2016 |
| Radtke Creative Limited | Information & communication | 2019 |
| Raeburn Consulting Limited | Information & communication | 2022 |
| Rafa Capital Ltd | Real estate | 2023 |
| Raffles Diamond Co. Ltd. | Wholesale & retail | 2002 |
| Ragwormers Intense Events Ltd | Administrative & support | 2021 |
| Rahul RAI Ltd | Real estate | 2022 |
| Railable Engineers Limited | Professional & scientific | 2022 |
| Rainvic UK Ltd | Other services | 2024 |
| Raising Strong Kids Ltd | Wholesale & retail | 2021 |
| Rake Properties Limited | Real estate | 1995 |
| Raleola Limited | Real estate | 2014 |
| Ramco Consultants Limited | Information & communication | 2023 |
| Rampaging Pixels Ltd | Information & communication | 2021 |
| Rango's Hub Ltd | Hospitality | 2024 |
| Rapid Grab Ltd | Administrative & support | 2025 |
| Rasaro Creative Limited | Other services | 2017 |
| Ratapulgo Limited | Professional & scientific | 2023 |
| Ratherforde Limited | Energy | 2021 |
| Rathunas Ltd | Information & communication | 2018 |
| Raven Plants Limited | Extraterritorial | 2009 |
| Raven Sky Consulting Ltd | Professional & scientific | 2023 |
| Ravensclaw Software Limited | Information & communication | 2016 |
| Ravenscourt Consulting Services Limited | Professional & scientific | 2018 |
| Raving Rooster Ltd | Hospitality | 2025 |
| Ravzam Ltd | Other services | 2025 |
| Rawstar Foods Ltd | Wholesale & retail | 2018 |
| RAY Lake Marine Finishers Ltd | Manufacturing | 2018 |
| RAY Landells Medical Services Limited | Health & social care | 2015 |
| Rayner Consulting Limited | Information & communication | 2026 |
| Rayner Homes Limited | Construction | 2000 |
| Rayner Jones Employment Law and HR Services Limited | Professional & scientific | 2020 |
| Razacar UK Ltd | Information & communication | 2025 |
| RB Wickfield Ltd | Professional & scientific | 2014 |
| RBK Limited | Education | 2021 |
| Rblp Limited | Real estate | 2026 |
| Rbutcher Engineering Ltd | Information & communication | 2022 |
| Rcbf Limited | Professional & scientific | 2026 |
| RCV Engines Limited | Manufacturing | 1997 |
| RD Carpentry and Construction Ltd | Construction | 2025 |
| RD IT Services Limited | Information & communication | 2023 |
| RD Medicolegal Limited | Health & social care | 2024 |
| Rd.Pl Limited | Professional & scientific | 2024 |
| Reactive & Planned Maintenance Ltd | Construction | 2026 |
| Read Residential Properties Limited | Real estate | 2017 |
| Reader Options Limited | Administrative & support | 2000 |
| Reading the Room Limited | Professional & scientific | 2022 |
| Ready 2 MIX Ltd | Manufacturing | 2021 |
| Reageo Ltd | Information & communication | 2025 |
| Real System Solutions Limited | Information & communication | 2023 |
| Rebecca Gill Interiors Ltd | Professional & scientific | 2022 |
| Rectory Construction (Dorset) Ltd | Construction | 2026 |
| Red Cat Distribution Limited | Wholesale & retail | 2004 |
| Red Dirt Co Ltd | Wholesale & retail | 2025 |
| Red Explosion Limited | Information & communication | 2019 |
| Red FIN Cider Ltd | Manufacturing | 2020 |
| Red Kite Contracting Ltd | Administrative & support | 2023 |
| Red Kite Vehicle Consultants Limited | Manufacturing | 1982 |
| Red Lion Ventures Limited | Hospitality | 2018 |