| Placing Leaders Limited | Administrative & support | 2003 |
| Plasmotec Limited | Manufacturing | 1988 |
| Platinum Holdings Corby Limited | Financial services | 2025 |
| Playball Brackley Ltd | Transport & logistics | 2017 |
| Playing Field Road Westbury Management Company Limited | Extraterritorial | 2014 |
| Playsmashd Ltd | Information & communication | 2026 |
| PLH Direct Limited | Construction | 2012 |
| Plumbing & Heating Svcs Ltd | Construction | 2022 |
| Pluno Bidco Limited | Extraterritorial | 2023 |
| PMA Consultancy Services Limited | Information & communication | 2010 |
| PMF Eco-Farm Ltd | Agriculture & fishing | 2013 |
| PMF Project Consultants Limited | Professional & scientific | 2020 |
| Podcount Ltd | Education | 2024 |
| Polo Relations Limited | Hospitality | 2001 |
| Pose Creative Media Ltd | Professional & scientific | 2023 |
| Powad Limited | Real estate | 2025 |
| Powder Coatings Direct Limited | Wholesale & retail | 2024 |
| Poynter Consulting Ltd | Professional & scientific | 2021 |
| Praxis Interim Ltd | Professional & scientific | 2025 |
| Precision Management Ltd | Professional & scientific | 2020 |
| Premier Duct Cleaning Limited | Extraterritorial | 2012 |
| Price Estates Ltd | Real estate | 2022 |
| Primary Coding League CIC | Education | 2025 |
| Prime Key Investments Ltd | Real estate | 2019 |
| Prime Social Care Services Ltd | Health & social care | 2020 |
| Principia International Ltd | Professional & scientific | 2025 |
| Prior Investment Portfolio Ltd | Real estate | 2025 |
| Private Market Consultancy Limited | Professional & scientific | 2010 |
| Prized Memorabilia & Collectables Ltd | Wholesale & retail | 2025 |
| Pro MCS Ltd | Professional & scientific | 2026 |
| Proactive Health and Mind Limited | Health & social care | 2018 |
| Production Control Ltd | Professional & scientific | 2026 |
| Professor Windows Limited | Construction | 2025 |
| Proflex Advanced Technology UK Ltd | Manufacturing | 2018 |
| Project 2 Construction Ltd | Construction | 2022 |
| Project Connaught Limited | Professional & scientific | 2019 |
| Project PI Limited | Professional & scientific | 2024 |
| Prop Vault Storage Ltd | Information & communication | 2025 |
| Propallent Ltd | Professional & scientific | 2024 |
| Proximity Properties Limited | Real estate | 2019 |
| Proximity Recruitment Limited | Administrative & support | 2016 |
| Proximity Ventures Limited | Wholesale & retail | 2025 |
| PS Voice Networks Limited | Information & communication | 2006 |
| Pubuk Holdings Limited | Real estate | 2023 |
| Puddleducks Limited | Health & social care | 2002 |
| PUG 1 OFF Limited | Wholesale & retail | 2005 |
| Pulse Insurance Limited | Financial services | 1998 |
| Purple Satchel Tuition Limited | Education | 2015 |
| QP Consulting Ltd | Professional & scientific | 2018 |
| Quantum Automotive Limited | Wholesale & retail | 2025 |
| Quest Arms Ltd | Professional & scientific | 2025 |
| Quod.D.D. Limited | Professional & scientific | 2024 |
| R & E Events Ltd | Hospitality | 2023 |
| R W Racing Services Limited | Wholesale & retail | 2004 |
| R. C. Pattinson & Partner Limited | Construction | 2007 |
| R.A.R.P.S (UK) Ltd | Information & communication | 2019 |
| R.J.V. (International) Limited | Transport & logistics | 1995 |
| Race Project Management Ltd | Professional & scientific | 2019 |
| Race-In Ltd | Wholesale & retail | 2012 |
| Racecraft Studio Ltd | Professional & scientific | 2024 |
| Racesport Ltd | Arts & recreation | 2023 |
| Rachel Aldana Limited | Other services | 2008 |
| Radial Holdings Limited | Real estate | 2024 |
| Radicool Fabrications Ltd | Manufacturing | 1998 |
| Radlett Fruiterers Ltd | Wholesale & retail | 2020 |
| Radstone Estate Limited | Agriculture & fishing | 2004 |
| Radstone Group Limited | Information & communication | 2023 |
| Rail Industry Management Solutions Ltd | Professional & scientific | 2021 |
| Rainbow International Carpet Dyeing and Cleaning Company Limited | Professional & scientific | 1993 |
| Rajesh Logistics 2025 Ltd | Transport & logistics | 2025 |
| Rallyd Ltd | Information & communication | 2026 |
| Ralph Leckie Limited | Households | 2026 |
| RAR Electronics Limited | Manufacturing | 2023 |
| Rational Properties Ltd | Real estate | 2015 |
| RB Lawns Ltd | Administrative & support | 2024 |
| Reach for Fitness Limited | Other services | 2013 |
| Reading Matters Bookshop LLP | | 2012 |
| Rebecca Rainbow Ltd | Health & social care | 2024 |
| Recromedia Ltd | Information & communication | 2012 |
| Recuperate Therapy Ltd | Other services | 2024 |
| Recycle My Auto Ltd | Wholesale & retail | 2020 |
| Red ANT Consulting Limited | Professional & scientific | 2004 |
| Red Barn Retreat Limited | Other services | 2013 |
| Redbeard Effects Ltd | Manufacturing | 2019 |
| Redbreeze Consulting Limited | Professional & scientific | 2007 |
| Redshell Consulting Limited | Professional & scientific | 2014 |
| Redtek Ventures Limited | Transport & logistics | 2020 |
| Reids DRY Cleaning Consultants Limited | Professional & scientific | 2008 |
| Renshu Ltd | Administrative & support | 2013 |
| Resource Chemicals Limited | Wholesale & retail | 1986 |
| Restful Pets Limited | Other services | 2019 |
| Restless Toucan Ltd | Information & communication | 2025 |
| Resusplus Training Limited | Education | 2019 |
| Revo Padel Limited | Arts & recreation | 2025 |
| Revolution Property Limited | Real estate | 2024 |
| Revolution Signs Limited | Manufacturing | 2005 |
| Revolution Simulations Ltd | Information & communication | 2013 |
| RF Design Organisation Ltd | Professional & scientific | 2003 |
| Rhino Innovation Ltd | Other services | 2020 |
| RHR Composites Ltd | Manufacturing | 2024 |