| Powerfloor Ltd | Construction | 2026 |
| Powrd UP Ltd | Construction | 2025 |
| Prem Bidco Limited | Financial services | 2022 |
| Premier Cleaning Limited | Administrative & support | 2008 |
| Premier Composites Limited | Other services | 1992 |
| Premier Gardening Services Ltd | Other services | 2011 |
| Premier Glazing and Locks Limited | Construction | 2026 |
| Premier Heat & Air London Ltd | Construction | 2025 |
| Premier Marketing Services Ltd | Wholesale & retail | 2024 |
| Premierchoice Limited | Manufacturing | 2004 |
| Premium Brickwork Limited | Construction | 2021 |
| Prerequisite Contract Services Limited | Wholesale & retail | 2013 |
| Presst Ltd | Manufacturing | 2022 |
| Prestige Construction Services Ltd | Construction | 2016 |
| Prestige Transport Compliance and Training Ltd | Education | 2022 |
| Pricing Knowledge Ltd | Real estate | 2018 |
| Priden (UK) Ltd | Manufacturing | 2013 |
| Priden Holdings Ltd | Financial services | 2017 |
| Priestley Removals and Storage Ltd | Extraterritorial | 2023 |
| Principle Group Ltd | Financial services | 2024 |
| Principle Property Development Ltd | Construction | 2024 |
| Prior & Willis Limited | Other services | 2010 |
| Pristinely Clean Limited | Administrative & support | 2024 |
| Pro City Painters Limited | Construction | 2024 |
| Pro-Clean Industrial UK Limited | Administrative & support | 2009 |
| Pro-Create Construction Limited | Construction | 2016 |
| Pro-Works Ltd | Professional & scientific | 2026 |
| Proctor Construction Limited | Construction | 1994 |
| Procuro Healthcare Limited | Administrative & support | 2013 |
| Professional Football & Performance Coaching Ltd | Education | 2023 |
| Project a Environmental Ltd | Wholesale & retail | 2025 |
| Project a Holdings Ltd | Professional & scientific | 2025 |
| Project a International Ltd | Professional & scientific | 2019 |
| Project a Motorsport Ltd | Professional & scientific | 2025 |
| Project Print Limited | Manufacturing | 2009 |
| Project Services Network Ltd | Construction | 2025 |
| Pronto Container Services Limited | Transport & logistics | 2015 |
| Pronto Skip Ltd | Water & waste | 2022 |
| Property Revolutions Limited | Professional & scientific | 2007 |
| Prostyle Installations Ltd | Construction | 2023 |
| Protec Automation Ltd | Manufacturing | 1993 |
| Protec Service and Support Ltd | Manufacturing | 2025 |
| Protec Site Services Ltd | Professional & scientific | 2023 |
| Proway Surfacing & Groundworks Ltd | Construction | 2023 |
| PTSD999 | Other services | 2017 |
| Pulse Practice Limited | Health & social care | 2023 |
| Pure Fine Laser Ltd | Administrative & support | 2018 |
| Pure Heart Establishment Ltd | Administrative & support | 2018 |
| Pure Heart Holdings Ltd | Financial services | 2020 |
| Pure Heart Homecare Ltd | Health & social care | 2018 |
| Pure Property AB Ltd | Real estate | 2026 |
| Pure-Pat Electrical Testing Limited | Professional & scientific | 2017 |
| Purestone Developments Ltd | Construction | 2017 |
| PW Engineering (Fabrications) Limited | Manufacturing | 2013 |
| PWD Holdings Limited | Real estate | 2016 |
| PWN Contractors Ltd | Construction | 2025 |
| Pykst Pokst CIC | Education | 2024 |
| PYO Produce Shop Ltd | Wholesale & retail | 2022 |
| Q&T Nails Ltd | Other services | 2022 |
| Qantara Commerce Ltd | Wholesale & retail | 2025 |
| Qualipharm Ltd | Wholesale & retail | 2023 |
| Quality COMMS2 Limited | Energy | 2004 |
| Quality Home Improvments Ltd | Administrative & support | 2025 |
| Quay Centre Limited | Wholesale & retail | 2002 |
| Quick Retail Ltd | Wholesale & retail | 2025 |
| Quintus Partnership Limited | Administrative & support | 1997 |
| Quod Bonum (FFS) Limited | Professional & scientific | 2015 |
| Quynh Property Ltd | Real estate | 2025 |
| R Amps Plumbing & Heating Limited | Construction | 2026 |
| R Farms Ltd | Agriculture & fishing | 2014 |
| R Hornby Homes Limited | Real estate | 2024 |
| R J & J Bales Limited | Hospitality | 2002 |
| R J Garnett & Sons Limited | Agriculture & fishing | 2006 |
| R K Merton Ltd | Construction | 2025 |
| R K Piccaver Properties Ltd | Real estate | 2021 |
| R Murfitt Carpentry and Construction Ltd | Construction | 2025 |
| R P Cladding Solutions Limited | Wholesale & retail | 2013 |
| R W Healthcare Ltd | Administrative & support | 2010 |
| R&H Power Services Limited | Professional & scientific | 2024 |
| R. T Plant Services Limited | Manufacturing | 2023 |
| R.T.S Sign Installation Ltd | Construction | 2019 |
| R.V.G. Agricultural Labour Limited | Agriculture & fishing | 2000 |
| RA Payne Holdings Limited | Real estate | 2024 |
| Rachel Wear Ltd | Wholesale & retail | 2026 |
| Rachr Ltd | Administrative & support | 2026 |
| Railfocus Limited | Professional & scientific | 2005 |
| Rainbow Boilers and Bathrooms Limited | Construction | 2019 |
| Rainbow Healthcare Services Limited | Wholesale & retail | 2015 |
| RAJ Lata Ltd | Hospitality | 2025 |
| Ramdut Limited | Wholesale & retail | 2016 |
| Ramnoth Road (Wisbech) Management Company Limited | Households | 1999 |
| Rampage Haulage Ltd | Transport & logistics | 2026 |
| Ramunas Trading (UK) Ltd | Wholesale & retail | 2023 |
| RAO Development Ltd | Transport & logistics | 2019 |
| Rapid Rubbish Ltd | Water & waste | 2018 |
| RAY Chan Design Ltd | Professional & scientific | 2021 |
| RB Business Services Ltd | Professional & scientific | 2021 |
| RBS Meats Ltd | Wholesale & retail | 2019 |
| Rccg Throne of Grace Wisbech | Other services | 2018 |
| RCF Engineering Limited | Professional & scientific | 2025 |