| Property HB Ltd | Real estate | 2024 |
| Propius Limited | Professional & scientific | 2025 |
| Propl Limited | Professional & scientific | 2021 |
| PROPT2 Limited | Information & communication | 2025 |
| Proscreen Ltd | Health & social care | 2023 |
| Protolink Solutions Ltd | Professional & scientific | 2025 |
| Provost Place Limited | Administrative & support | 2017 |
| PRS Plumbing & Heating Services Limited | Construction | 1996 |
| Prudential Buildings Management Limited | Households | 2024 |
| Prudential Buildings RTM Company Limited | Households | 2026 |
| Psracing Limited | Arts & recreation | 2021 |
| Ptarmigan & Eden AM Limited | Agriculture & fishing | 2023 |
| Ptpp Ltd | Administrative & support | 2009 |
| Public Accountability Training Limited | Public administration | 2024 |
| Publishing Strategy Ltd | Information & communication | 2024 |
| Pucknall Farms Limited | Agriculture & fishing | 1984 |
| Puddle Shark Ltd | Administrative & support | 2013 |
| Puffer One Limited | Information & communication | 2015 |
| Puffin Central Limited | Professional & scientific | 2018 |
| Pukeko Property Limited | Construction | 2017 |
| Purchase Construction Limited | Construction | 1987 |
| Purdie & Swan Lettings Limited | Professional & scientific | 2015 |
| Pure Lounge Bar Limited | Hospitality | 2009 |
| Pure to the Core Limited | Hospitality | 2024 |
| Pure-Sports Turf Management Ltd | Arts & recreation | 2024 |
| Purenest Limited | Administrative & support | 2001 |
| Pureserv Ltd | Construction | 2023 |
| Purple Apps Ltd | Information & communication | 2023 |
| Purple Chilli Logistics Ltd | Administrative & support | 2024 |
| Purple FIG Limited | Professional & scientific | 2008 |
| Purple Patch Holdings Ltd | Real estate | 2017 |
| Puxim Limited | Financial services | 2009 |
| Pwpn Operations Limited | Administrative & support | 2024 |
| PY Commercial Limited | Construction | 2023 |
| Q Venues Ltd | Administrative & support | 2023 |
| Q2Q Foundation Limited | Administrative & support | 2018 |
| QA3 Limited | Professional & scientific | 2011 |
| Qair LLP | | 2019 |
| Qcumber Consulting Ltd | Professional & scientific | 2023 |
| QDM Limited | Other services | 2009 |
| Qgate Holdings Limited | Financial services | 2017 |
| Qgate Software Limited | Information & communication | 1997 |
| QIC Systems Limited | Information & communication | 1999 |
| Qracleai Ltd | Information & communication | 2025 |
| QS Force Ltd | Professional & scientific | 2020 |
| Quada (Harbourside) Limited | Real estate | 1999 |
| Quada (Henley) Limited | Construction | 2018 |
| Quadology Ltd | Manufacturing | 2023 |
| Quadrangle Consulting Limited | Professional & scientific | 2017 |
| Quality British Foods Limited | Agriculture & fishing | 2014 |
| Quanmaine LLP | | 2019 |
| Quant-B Limited | Professional & scientific | 2019 |
| Quantum Axis Limited | Professional & scientific | 2025 |
| Quatervois Ltd | Professional & scientific | 2017 |
| Quay 2000 RTM Company Limited | Households | 2008 |
| Quay Developments (Southern) Limited | Financial services | 2015 |
| Quay Hill Trustee Company Limited | Other services | 2005 |
| Quayside RD Flats (Freehold) Limited | Administrative & support | 2017 |
| Queensberry Consulting Services Ltd | Professional & scientific | 2025 |
| Quendon Properties LLP | | 2007 |
| Quest Childcare Ltd | Health & social care | 2025 |
| Quicksmith Consulting Ltd | Professional & scientific | 2023 |
| Quickthorn Coachworks Ltd | Manufacturing | 2026 |
| Quinta Investments Limited | Real estate | 2025 |
| Quirk Learning Experience Solutions Ltd | Information & communication | 2022 |
| Qware Limited | Information & communication | 2021 |
| R & B Trust Corporation Limited | Other services | 1997 |
| R and a Marsh Farms Limited | Agriculture & fishing | 2017 |
| R Brown S.L.E> Ltd | Professional & scientific | 2019 |
| R J Bull Limited | Administrative & support | 2020 |
| R Jones Haulage Ltd | Administrative & support | 2015 |
| R Lukins Fitness Limited | Arts & recreation | 2017 |
| R Russell Consultancy Limited | Real estate | 2017 |
| R T Tax Consulting Limited | Professional & scientific | 2014 |
| R Winchester Cars Ltd | Transport & logistics | 2023 |
| R&B Limited | Professional & scientific | 2000 |
| R&J Concrete Repair Specialists Limited | Construction | 2017 |
| R&L Accountancy Ltd | Professional & scientific | 2012 |
| R&S Payton Farms LLP | | 2013 |
| R&W Newman Farming Limited | Financial services | 2016 |
| R. Brown Specialist Laundry Engineering Ltd | Professional & scientific | 2012 |
| R. Morgan Garden & Landscape Services Limited | Administrative & support | 2019 |
| R.A.R.E. Brickwork & Construction Ltd | Construction | 2026 |
| R.G. Maidment Limited | Transport & logistics | 1978 |
| R.J. Ledger Limited | Information & communication | 1992 |
| R.W.H.Properties Limited | Real estate | 1954 |
| R2 SUB Limited | Hospitality | 2017 |
| R3 SF Limited | Construction | 2011 |
| Rabbits Property Ventures Limited | Real estate | 2020 |
| Rachael Gardner Consultancy Ltd | Professional & scientific | 2022 |
| Rachel Archer Limited | Agriculture & fishing | 2002 |
| Rachel Niddrie Design Limited | Professional & scientific | 2013 |
| Racket Recruitment Limited | Professional & scientific | 2022 |
| Racket Shack Ltd | Wholesale & retail | 2025 |
| Radakin Limited | Professional & scientific | 2025 |
| Radamec Control Systems Limited | Manufacturing | 1986 |
| Radar Cover Ltd | Transport & logistics | 2014 |
| Radfilms Ltd | Arts & recreation | 2017 |
| Radiance Holdings Limited | Financial services | 2026 |
| Radiology Imaging Group (UK) Limited | Health & social care | 2014 |