| Quada (Esher) Limited | Real estate | 2008 |
| Quada (Holyport) Limited | Real estate | 1998 |
| Quadrigy Construction Management Limited | Construction | 2008 |
| Quadrigy Engineering Ltd | Construction | 2014 |
| Quadrigy Limited | Professional & scientific | 2019 |
| Quadrigy Living Ltd | Real estate | 2019 |
| Quantum Healthcare Consultants Limited | Health & social care | 2022 |
| Quattroo Limited | Information & communication | 2017 |
| Quayle Medical Limited | Health & social care | 2022 |
| Quintro Ashburton Limited | Professional & scientific | 2022 |
| Quintro Callington Limited | Professional & scientific | 2023 |
| Quintro Holdings Limited | Extraterritorial | 2010 |
| Quirkart Limited | Wholesale & retail | 2012 |
| Qureshi and Associates Limited | Professional & scientific | 1997 |
| R Fernandez Consulting Ltd | Health & social care | 2023 |
| R First Services Ltd | Wholesale & retail | 2017 |
| R Hettige Medical Practice Ltd | Health & social care | 2019 |
| R Meek Solid Surfaces Ltd | Construction | 2018 |
| R ORD Cbms Limited | Construction | 2008 |
| R R Parts Limited | Wholesale & retail | 2008 |
| R S Design & Technology Ltd | Manufacturing | 2011 |
| R.J.Light Services Limited | Professional & scientific | 2009 |
| R.O.S.A.S.T Ltd | Agriculture & fishing | 2019 |
| R4 Surfacing Limited | Manufacturing | 2021 |
| Radio Technology Holdings Limited | Wholesale & retail | 1998 |
| Rage Phase Ltd | Wholesale & retail | 2024 |
| RAK Massage Therapy Limited | Other services | 2024 |
| RAM Capital Limited | Real estate | 2010 |
| Ranvilles Farm Limited | Real estate | 2023 |
| Raods Theatre Production Company Limited | Arts & recreation | 2024 |
| Ravencor Ltd | Professional & scientific | 2026 |
| RAW Urban Ltd | Professional & scientific | 2025 |
| Rawlins Decor Ltd | Construction | 2024 |
| RB Managing Ltd | Hospitality | 2025 |
| Rbcleans Ltd | Administrative & support | 2023 |
| RCC Glass Holdings Ltd | Construction | 2024 |
| Rcsc Anaesthesia Limited | Health & social care | 2019 |
| RDB Electrical (South) Limited | Construction | 2018 |
| RDF Building & Maintenance Ltd | Construction | 2026 |
| Reach OUT Caring Limited | Health & social care | 2020 |
| Reach OUT Initiative Limited | Manufacturing | 2024 |
| React Films Limited | Information & communication | 2006 |
| Reading Spinal Unit Limited | Health & social care | 2013 |
| Really Useful Domains Ltd | Information & communication | 2005 |
| REB Anaesthetics Ltd | Health & social care | 2024 |
| Rebecca Lowe Ltd | Education | 2026 |
| Recquest Ltd | Administrative & support | 2024 |
| Red and White Health Limited | Health & social care | 2018 |
| Red ANT Properties Ltd | Real estate | 2018 |
| Red Arrow (Southampton) Group Limited | Administrative & support | 2009 |
| Red Arrow Software Limited | Information & communication | 1997 |
| Red Line Logistics (UK) Limited | Transport & logistics | 2001 |
| Redleif Carpentry Ltd | Manufacturing | 2023 |
| Redlux Limited | Manufacturing | 2005 |
| Redshank Managed Print Solutions Ltd | Information & communication | 2015 |
| Redwood (Timsbury) Limited | Households | 2012 |
| Redwood Advertising Limited | Professional & scientific | 2011 |
| Redwood Self Storage Limited | Other services | 2020 |
| Reesland Consulting Ltd | Professional & scientific | 2025 |
| Reeves Independent Financial Management Limited | Financial services | 2004 |
| Regal ROW Limited | Real estate | 2003 |
| Reliance Property Solutions Ltd | Households | 2013 |
| Rendili Limited | Information & communication | 2003 |
| Reneux UK Limited | Wholesale & retail | 2019 |
| Retroplan Ltd | Construction | 1992 |
| Retrospec Environmental Services Limited | | 1992 |
| Revamp Resin Flooring Limited | Construction | 2018 |
| Revenuegen Ltd | Professional & scientific | 2019 |
| Rexcom Europe Limited | Professional & scientific | 2000 |
| RFS Medical Services Limited | Health & social care | 2012 |
| Rfsp Limited | Financial services | 2025 |
| RGC Electrical Limited | Construction | 2011 |
| RHB Plumbing and Heating Solutions Ltd | Construction | 2025 |
| Rhinoped Medical Limited | Health & social care | 2013 |
| RHV Marine Limited | Professional & scientific | 2015 |
| Rhys Court Residents Company Ltd | Other services | 1997 |
| Ribas Santos Parts Ltd | Transport & logistics | 2022 |
| Ribble Close RTM Company Limited | Households | 2011 |
| Richard Knight Limited | Wholesale & retail | 2004 |
| Richard Pickard Frcs Limited | Health & social care | 2012 |
| Richards Medical and Legal Services Limited | Health & social care | 2019 |
| Richmond House Beauty Limited | Other services | 2019 |
| Rickshaw Romsey Limited | Hospitality | 2015 |
| Ripon Driving Range Limited | Arts & recreation | 2024 |
| Rise UP Festival Limited | Other services | 2020 |
| Risebury Knee Ltd | Health & social care | 2022 |
| Risk Master Publishing Limited | Information & communication | 2025 |
| Risynergy Limited | Professional & scientific | 2016 |
| Rivermark Group Limited | Construction | 2026 |
| Rivermead House Limited | Real estate | 2004 |
| RJB Anaesthesia Limited | Health & social care | 2019 |
| RJK Sports Limited | Arts & recreation | 2017 |
| Rkmortgages Ltd | Financial services | 2026 |
| RLS Medical Services Limited | Health & social care | 2011 |
| Robsons Rural Ltd | Administrative & support | 2025 |
| Rockerwebber Ltd | Financial services | 2011 |
| Rockstone Investments Limited | Professional & scientific | 1963 |
| Rockstone Public House Limited | Hospitality | 2015 |
| Rockware Ltd | Information & communication | 2024 |
| Rococo Glass Ltd | Construction | 1999 |