| PWR 2024 Limited | Hospitality | 2023 |
| Pybus Developments Limited | Real estate | 2005 |
| Pymax Ltd | Information & communication | 2020 |
| Pythona Studios Limited | Wholesale & retail | 2022 |
| Pyxis Ventures Limited | Information & communication | 2009 |
| QA Websites Ltd | Information & communication | 2019 |
| Qapit Online Limited | Education | 2024 |
| QJG Ltd | Wholesale & retail | 2026 |
| Qpsd 1 Limited | Professional & scientific | 2010 |
| Qpsd 2 Limited | Professional & scientific | 2010 |
| Quake Limited | Administrative & support | 2016 |
| Qualiturn Engineering Limited | Manufacturing | 2009 |
| Quality & Safety Solutions Ltd | Professional & scientific | 2025 |
| Quality Build Construction and Supplies Ltd | Real estate | 2023 |
| Quality Construction & Contracting Limited | Construction | 2022 |
| Quantum Cooling Limited | Energy | 2025 |
| Quantum Mindshare Limited | Information & communication | 2025 |
| Quarkly Limited | Financial services | 2022 |
| Quarterdeck Coffee Ltd | Wholesale & retail | 2025 |
| Quartz Urban Logistics Limited | Transport & logistics | 2023 |
| Quartz Urban Properties Ltd | Real estate | 2023 |
| Quay Building Services (Hampshire) Ltd | Administrative & support | 2018 |
| Quay Fire Door Services Ltd | Construction | 2026 |
| Quayside Cleanroom Solutions Ltd | Construction | 2023 |
| Quayside Property (Southern) Limited | Construction | 2017 |
| Quayside Property Solutions Ltd | Real estate | 2024 |
| Quaystage Training Ltd | Education | 2013 |
| Qubzo Limited | Information & communication | 2020 |
| Quentin Milner Limited | Health & social care | 2018 |
| Quick Space Limited | Administrative & support | 2005 |
| Quickthyme Nutrition Ltd | Information & communication | 2020 |
| Quickwork Limited | Administrative & support | 2021 |
| Quintessential Ltd | Professional & scientific | 2022 |
| Quvara Group Limited | Financial services | 2025 |
| Quvara Medical Holdings Limited | Financial services | 2025 |
| Quvara Medical Limited | Manufacturing | 2025 |
| Qwik Park Limited | Information & communication | 2017 |
| R & a Roofing Ltd | Construction | 2012 |
| R & G Collins Solutions Limited | Professional & scientific | 2023 |
| R & G Quality Care Limited | Health & social care | 2010 |
| R & G Residential Care Limited | Health & social care | 2003 |
| R & S Young Management Services Limited | Financial services | 2012 |
| R B G Property Ltd | Real estate | 2023 |
| R B Hairdressing Ltd | Other services | 2022 |
| R C Trotman Limited | Construction | 2002 |
| R D Fishing Limited | Agriculture & fishing | 2016 |
| R Daniels Fencing Limited | Administrative & support | 2026 |
| R F Groundworks & Surfacing Limited | Construction | 2018 |
| R F H Marketing Ltd | Other services | 2022 |
| R GAS Services Southern Ltd | Construction | 2026 |
| R Grass IS Greener Limited | Manufacturing | 2018 |
| R J Butler & Sons (South) Ltd | Construction | 2023 |
| R J C Solutions Limited | Administrative & support | 2012 |
| R J Harris Contracts Limited | Water & waste | 1996 |
| R J Payne & Sons Limited | Construction | 2012 |
| R J S Rail Services Limited | Construction | 2018 |
| R L Bars Ltd | Hospitality | 2025 |
| R M Toys Limited | Wholesale & retail | 2005 |
| R Systems Computaris International Limited | Information & communication | 2006 |
| R W Spray Tech Limited | Manufacturing | 2021 |
| R Warton Groundworks Limited | Construction | 2020 |
| R&I Lighting Ltd | Information & communication | 2025 |
| R&M Angels Corporation Ltd | Real estate | 2025 |
| R&M PUB Co Ltd | Hospitality | 2025 |
| R. K. Williams Roofing & Building Limited | Construction | 2015 |
| R. P. Marine Limited | Agriculture & fishing | 2010 |
| R.H. Flynn Ltd | Professional & scientific | 2026 |
| R.J.S Shinrai Limited | Administrative & support | 2020 |
| R2 Solutions Limited | Construction | 2025 |
| RA Digital Media Limited | Information & communication | 2024 |
| Rablm Services Limited | Professional & scientific | 2012 |
| Racundra Limited | Professional & scientific | 2002 |
| RAD Auto Services Ltd. | Wholesale & retail | 2017 |
| Radcentral Ltd | Education | 2026 |
| Raddon Lettings Ltd | Real estate | 2023 |
| Radiance Beauty Salon Ltd | Other services | 2010 |
| Radiator Showroom Ltd | Information & communication | 2006 |
| Radical Overload Projects Limited | Wholesale & retail | 2021 |
| Radiology 4U Limited | Health & social care | 2025 |
| Radiology Services Limited | Health & social care | 2004 |
| Rafferty (Plasterers) Limited | Construction | 1987 |
| Rafferty Holdings (South) Limited | Financial services | 2024 |
| Rafferty Resourcing Limited | Administrative & support | 2014 |
| Raffinato Limited | Construction | 2019 |
| Raft Systems Limited | Information & communication | 1987 |
| Rainbow Self Storage Limited | Other services | 2015 |
| Rainshield U.K. Limited | Other services | 2001 |
| Rake Car Sales Limited | Wholesale & retail | 2010 |
| Rali Films Limited | Professional & scientific | 2024 |
| Ramra Holdings Ltd | Financial services | 2026 |
| Rangam Consultants Limited | Administrative & support | 2013 |
| Range and Vision Ltd. | Professional & scientific | 2015 |
| Ranivox Ltd | Wholesale & retail | 2025 |
| Rapid Run Solution Limited | Transport & logistics | 2024 |
| RAR Consultancy Services Limited | Public administration | 2024 |
| Raro Homes Ltd | Real estate | 2024 |
| RAT & Spanner Limited | Real estate | 2009 |
| Rated Buildings Limited | Professional & scientific | 2020 |
| Ratedby Limited | Administrative & support | 2021 |
| Raucous Music Limited | Wholesale & retail | 2002 |