| PVF Drinks Limited | Hospitality | 2020 |
| PVK Limited | Financial services | 2025 |
| PW Joinery Ltd | Manufacturing | 2019 |
| PWB Consultancy Solutions Ltd | Professional & scientific | 2021 |
| PWK Solutions Ltd | Construction | 2013 |
| PY Properties Ltd | Real estate | 2023 |
| Pymms Limited | Construction | 2018 |
| Pyrois Properties Ltd | Construction | 2024 |
| Q People Solutions Limited | Information & communication | 2012 |
| Q2W Training Limited | Education | 2018 |
| Q3D Studios Limited | Information & communication | 2003 |
| QA and Testing Contractors Ltd | Information & communication | 2025 |
| QA E2E Limited | Information & communication | 2016 |
| Qaexperts Ltd | Information & communication | 2021 |
| Qalo Brands Group Ltd | Wholesale & retail | 2022 |
| QD 4 YOU Ltd | Construction | 2018 |
| Qdsa Services Ltd | Health & social care | 2024 |
| Qfactorial Ltd | Professional & scientific | 2013 |
| QM Leisure Limited | Arts & recreation | 2020 |
| Qmis Limited | Administrative & support | 2007 |
| Qodeko Ltd | Information & communication | 2023 |
| Qolabi Ltd | Information & communication | 2026 |
| Qrapah Investments Ltd | Real estate | 2021 |
| Qryto Limited | Manufacturing | 2024 |
| Qtrends Ltd | Wholesale & retail | 2025 |
| Qualitasse Limited | Administrative & support | 1987 |
| Qualitop Engineering and Projects Ltd | Construction | 2026 |
| Quality Irrigation Wessex Ltd | Manufacturing | 2008 |
| Quality Roofing Hampshire Ltd | Construction | 2015 |
| Quanta Films Limited | Information & communication | 1985 |
| Quanta Limited | Information & communication | 1981 |
| Quantpro Consulting Limited | Professional & scientific | 2024 |
| Quantum Cleaning and Specialist Services Limited | Administrative & support | 2013 |
| Quantum Value Limited | Information & communication | 2011 |
| Quantumleafai Ltd | Information & communication | 2025 |
| Quenby Prints Limited | Professional & scientific | 1991 |
| Quenby Transfers Limited | Wholesale & retail | 1993 |
| Quest Controls Ltd | Construction | 2015 |
| Quickzdeals Ltd | Wholesale & retail | 2024 |
| Quince Counselling (UK) Limited | Education | 2025 |
| Quinn Hospitality & Catering Ltd | Hospitality | 2024 |
| Quiva Services Ltd | Other services | 2018 |
| Quizapp Ltd | Information & communication | 2026 |
| Qumillion Limited | Information & communication | 2012 |
| QW9 Holding Ltd | Financial services | 2020 |
| R & I Financial Services Limited | Financial services | 2019 |
| R & R Autos Bodyshop Limited | Wholesale & retail | 2001 |
| R & S Distribution Ltd | Wholesale & retail | 2026 |
| R a (N0 7) Limited | Financial services | 2010 |
| R a (NO 10) Limited | Financial services | 2010 |
| R a (NO 3) Limited | Financial services | 2008 |
| R a (NO 4) Limited | Financial services | 2008 |
| R a (NO 8) Limited | Financial services | 2010 |
| R a (NO 9) Limited | Extraterritorial | 2010 |
| R a Fisher Limited | Real estate | 2024 |
| R and R Tyres (Hampshire) Limited | Wholesale & retail | 2007 |
| R Dawe Ltd | Administrative & support | 2012 |
| R J Hanks Carpentry Ltd | Construction | 2003 |
| R Knight JCB & Plant Hire Ltd | Construction | 2007 |
| R L J Decorating Ltd | Construction | 2005 |
| R N Beveridge Ltd | Transport & logistics | 2017 |
| R S Outdoors Ltd | Education | 2021 |
| R T Gaiger Ltd | Wholesale & retail | 2015 |
| R W Armstrong & Sons Limited | Construction | 1962 |
| R W Armstrong Conservation Ltd | Extraterritorial | 2023 |
| R W Armstrong Group Limited | Financial services | 2019 |
| R W Armstrong Holdings Limited | Administrative & support | 2003 |
| R W Corporate Services Limited | Professional & scientific | 2005 |
| R&A Garage Ltd | Wholesale & retail | 2025 |
| R&D Autosport Limited | Wholesale & retail | 2022 |
| R&J Broad Ltd | Construction | 2017 |
| R&J Joinery Ltd | Manufacturing | 2021 |
| R&J Renovations Ltd | Construction | 2022 |
| R&R Housing Solutions Ltd | Real estate | 2026 |
| R. S. Crowe Limited | | 1985 |
| R.A. Mallare Limited | Real estate | 2025 |
| R.C.E Marciuc Transport Ltd | Transport & logistics | 2023 |
| R.Cosgrave Electrical Ltd | Construction | 2018 |
| R2D Builders Limited | Manufacturing | 2026 |
| R3 Capital Limited | Real estate | 2018 |
| R4DRIVING Ltd | Transport & logistics | 2015 |
| R8 Property Services Ltd | Real estate | 2026 |
| RA (NO. 11) Limited | Financial services | 2013 |
| RA (NO. 15) Limited | Financial services | 2013 |
| RA (NO.17) Limited | Financial services | 2016 |
| RA (NO.18) Limited | Financial services | 2016 |
| RA (NO.19) Limited | Financial services | 2016 |
| RA (NO.20) Limited | Extraterritorial | 2016 |
| RA Topco Limited | Financial services | 2019 |
| Raad Property Ltd | Real estate | 2024 |
| Raai Foods Ltd | Wholesale & retail | 2025 |
| Raakos Retail Limited | Wholesale & retail | 2022 |
| Raavon Software Limited | Information & communication | 2012 |
| Raayon Consulting Limited | Health & social care | 2026 |
| Rab's Welding & GAS Services Limited | Construction | 2014 |
| Racaas Ltd | Administrative & support | 2012 |
| Racewraps Limited | Extraterritorial | 2007 |
| Rachanna Enterprises Ltd | Professional & scientific | 2014 |
| Rachannas Limited | Information & communication | 2021 |
| Rachel Mccarthy Ltd | Professional & scientific | 2013 |