| Quinn Interiors Limited | Professional & scientific | 2024 |
| Quinns Design Ltd | Construction | 2025 |
| Qutrics Limited | Financial services | 2020 |
| Qutrics Property Holdings I Limited | Real estate | 2025 |
| QV Bidco Limited | Financial services | 2023 |
| QV Education (Group) Limited | Education | 2014 |
| QV Education Limited | Education | 2014 |
| R & J Farrow Limited | Water & waste | 2006 |
| R & W Gibson & SON Limited | Construction | 2002 |
| R Alford & Associates Ltd | Professional & scientific | 2024 |
| R E Marshall Limited | Construction | 2005 |
| R U Web Marketing Ltd | Wholesale & retail | 2013 |
| R&B Property Management Ltd | Real estate | 2017 |
| R&M Tech Services Ltd | Administrative & support | 2025 |
| R&T Consultants (MH) Limited | Professional & scientific | 2023 |
| R.A.W Vision (London) Limited | Professional & scientific | 2017 |
| R.W. Charlton Builders Limited | Construction | 2007 |
| R1 Barber Shop Ltd | Other services | 2025 |
| R1 Cuts Barber Ltd | Other services | 2026 |
| R1/ARTAR Limited | Construction | 2022 |
| R2P Limited | Professional & scientific | 2002 |
| RAA Ledger Sparks Ltd | Professional & scientific | 2002 |
| RAA North East Ltd | Professional & scientific | 2018 |
| RAA Ramon LEE Ltd | Professional & scientific | 2018 |
| RAA Thompson Jones Business Solutions Ltd | Professional & scientific | 2004 |
| Rachel Booth Ltd | Health & social care | 2018 |
| Rachel Chapman Ltd | Administrative & support | 2014 |
| Radhakrishna Leela & Sons Ltd | Hospitality | 2026 |
| Radiance Avenue Ltd | Health & social care | 2024 |
| Radix Imaging Ltd. | Health & social care | 2016 |
| Rafidain LS Legal Services Limited | Professional & scientific | 2024 |
| Raggeddesign Limited | Professional & scientific | 2016 |
| RAH - FC Limited | Financial services | 2025 |
| Rainwater Management Consultants Limited | Professional & scientific | 2024 |
| Raleigh Mills Working Solutions Ltd | Construction | 2018 |
| Ramtech Consultant Ltd | Information & communication | 2016 |
| Randall Orchard (Holdings) Limited | Construction | 1976 |
| Randall Orchard Construction Limited | Construction | 1992 |
| Randlesdown Limited | Other services | 1991 |
| Range Advantage Limited | Arts & recreation | 2012 |
| Rapid Reactors Ltd | Professional & scientific | 2017 |
| Rasch Limited | Wholesale & retail | 2025 |
| Ravensworth Consulting Limited | Professional & scientific | 2009 |
| RAW Shot Co Limited | Manufacturing | 2024 |
| Rawlings York Limited | Real estate | 2016 |
| Rawspace Ltd | Professional & scientific | 2005 |
| Rayan Services Ltd | Health & social care | 2020 |
| Raycom Ltd | Information & communication | 2010 |
| Raycom.Uk Limited | Professional & scientific | 2014 |
| Raydons Limited | Administrative & support | 1993 |
| RB Analytics Ltd | Professional & scientific | 2019 |
| RB Trading Richmond Limited | Hospitality | 2024 |
| Rbatra Limited | Transport & logistics | 2024 |
| RBE Crew Ltd | Administrative & support | 2022 |
| RBG KEW Enterprises Limited | Wholesale & retail | 1993 |
| Rbitr Limited | Professional & scientific | 2022 |
| RBK London Limited | Information & communication | 2020 |
| RBM (Northern) Limited | Agriculture & fishing | 2004 |
| Rbpt Enterprises Limited | Hospitality | 2018 |
| Rbsp Trading Ltd | Wholesale & retail | 2022 |
| RC Jenkinson Ltd | Construction | 2026 |
| RC Therapy Ltd | Health & social care | 2025 |
| RDF Design Works Ltd | Professional & scientific | 2021 |
| RDS Consulting Ltd | Professional & scientific | 2012 |
| RDS Extensions Ltd | Construction | 2017 |
| RDS Management Limited | Other services | 2009 |
| RE (SOE) Limited | Administrative & support | 1988 |
| RE - Imagine Capital Limited | Financial services | 2015 |
| RE - Imagine Energy Limited | Energy | 2015 |
| RE - Imagine Group Limited | Financial services | 2015 |
| RE - Imagine Trading Limited | Financial services | 1991 |
| RE - Imagine Waste Limited | Energy | 2016 |
| RE Balance Your Mind Ltd | Health & social care | 2022 |
| RE Drinks Distribution Ltd | Wholesale & retail | 2024 |
| Re...Root Limited | Health & social care | 2010 |
| Read and Edit Limited | Other services | 2019 |
| Reading Bridge CIC | Wholesale & retail | 2025 |
| Ready 365 Ltd | Information & communication | 2019 |
| READY2GO Partners Ltd | Administrative & support | 2024 |
| Reale Camiceria Italian Embroidery Ltd | Manufacturing | 2018 |
| Realm Residential Limited | Real estate | 2020 |
| Rebolucion Limited | Information & communication | 2020 |
| REC Affiliated Ltd | Agriculture & fishing | 2018 |
| REC Unaffiliated Ltd | Arts & recreation | 2018 |
| Reclova Civil & Environmental Ltd | Water & waste | 2026 |
| Reconsulting RTC Limited | Professional & scientific | 2008 |
| Red Door International Limited | Administrative & support | 2003 |
| Red Investments (London) Limited | Financial services | 2015 |
| Red Lions Estate Ltd | Construction | 2016 |
| Red Rain Ltd | Hospitality | 2018 |
| Red Square Design Group Ltd | Professional & scientific | 2026 |
| Redan Properties Limited | Construction | 2016 |
| Redbreast Services Group Ltd | Administrative & support | 2015 |
| Redgales Consulting Limited | Professional & scientific | 2015 |
| Redlink Recruitment Ltd | Public administration | 2013 |
| Redmans Limited | Professional & scientific | 2006 |
| Reebur Ltd | Administrative & support | 2010 |
| Reed Events Limited | Administrative & support | 2006 |
| Reed Exhibitions Limited | Administrative & support | 1960 |
| Reeth & District Gazette Ltd | Information & communication | 2008 |