| Prime Edge Consultants Ltd | Other services | 2025 |
| Prime Expert Group Ltd | Construction | 2022 |
| Prime Investments (West Sussex) Ltd | Real estate | 2021 |
| Prime Legacy EP Ltd | Professional & scientific | 2025 |
| Prime Location Investors Ltd | Real estate | 2012 |
| Prime London Real Estates Ltd | Real estate | 2020 |
| Prime Motion Physiotherapy Limited | Health & social care | 2025 |
| Prime Shine Valeting Ltd | Other services | 2025 |
| Prime Storage Limited | Construction | 2024 |
| Prime Surface Decorating Ltd | Construction | 2026 |
| Prime Trends Ltd | Wholesale & retail | 2024 |
| Primebyte Strategies Ltd | Information & communication | 2024 |
| Primed Media Ltd | Information & communication | 2008 |
| Primefix Automotive Ltd | Wholesale & retail | 2026 |
| Primegate Global Trading Ltd | Wholesale & retail | 2026 |
| Primelaptop Ltd | Wholesale & retail | 2025 |
| Primer X Building Ltd | Construction | 2018 |
| Primesuper Ltd | Hospitality | 2020 |
| Primesure Property Developments Limited | Administrative & support | 2018 |
| Primetek Engineering Limited | Real estate | 2018 |
| Primetrail Logistics Ltd | Transport & logistics | 2025 |
| Primlily Properties Ltd | Real estate | 2023 |
| Primo Brand Ltd | Wholesale & retail | 2024 |
| Primodry Carpet Cleaning Ltd | Administrative & support | 2016 |
| Primrose Carers Ltd | Health & social care | 2020 |
| Primrose Hill Management Company Limited | Households | 1995 |
| Primum Genus Services Limited | Real estate | 2012 |
| Principal Business Finance Limited | Financial services | 2022 |
| Principal Property Services Limited | Construction | 2024 |
| Principal Restoration Services Limited | Construction | 2025 |
| Principal Solutions Group Limited | Financial services | 2024 |
| Principle Property Services Limited | Construction | 2007 |
| Principled Offsite Logistics Limited | Transport & logistics | 2011 |
| Principled Partnership Limited | Administrative & support | 2009 |
| Principled Storage Limited | Extraterritorial | 2017 |
| Print Art Ltd | Manufacturing | 2016 |
| Print Copy Systems Limited | Administrative & support | 2017 |
| Printchef Ltd | Manufacturing | 2016 |
| Printed Puzzle Limited | Wholesale & retail | 2009 |
| Printer Consumables Supplies Limited | Manufacturing | 1999 |
| Printhaus (Northampton) Limited | Manufacturing | 2008 |
| Printing for Schools Limited | Manufacturing | 2017 |
| Printwhizz Limited | Manufacturing | 2014 |
| Priory House Estates Limited | Professional & scientific | 2009 |
| Prisacari Group Ltd | Manufacturing | 2025 |
| Prisca Care Ltd | Health & social care | 2023 |
| Prism Design Systems Limited | | 1991 |
| Prismcore Ltd | Wholesale & retail | 2025 |
| Pristine Cleaning Solutions Northampton Ltd | Administrative & support | 2022 |
| Pristine DRY Cleaning Ltd | Administrative & support | 2005 |
| Pritchpt Ltd | Health & social care | 2023 |
| Private Practice Marketing Group Ltd | Administrative & support | 2021 |
| Private Reserves Limited | Other services | 1988 |
| Private Shares Limited | Professional & scientific | 2013 |
| Prixamatic Ltd | Wholesale & retail | 2019 |
| Prixamatic Properties Ltd | Real estate | 2019 |
| Prize Arena Limited | Wholesale & retail | 2024 |
| PRJ Care Limited | Administrative & support | 2021 |
| PRK Trading Company Limited | Construction | 2005 |
| PRL Environmental Services Ltd | Professional & scientific | 2015 |
| PRM Financial Ltd | Financial services | 2018 |
| Prnd Ltd | Real estate | 2017 |
| Prnm Ltd | Financial services | 2024 |
| Pro 4Y Ltd | Construction | 2023 |
| Pro Archery Ltd | Wholesale & retail | 2014 |
| Pro Brew Ltd | Wholesale & retail | 2022 |
| Pro Build Property Solutions Ltd | Construction | 2024 |
| Pro Climate Control Ltd | Construction | 2026 |
| Pro Commissioning Services Limited | Construction | 2015 |
| Pro Driver Recruitment Ltd | Administrative & support | 2024 |
| Pro Feet Care Academy Ltd | Education | 2022 |
| Pro FIX & Fit Ltd | Construction | 2025 |
| Pro FIX Plus Limited | Construction | 2018 |
| Pro Highway Solutions Ltd | Construction | 2026 |
| Pro Hoops Blueprint Ltd | Professional & scientific | 2026 |
| Pro Hub Solution Ltd | Information & communication | 2025 |
| Pro Mounts UK Innovations Ltd | Manufacturing | 2025 |
| Pro Network Solution Ltd | Wholesale & retail | 2022 |
| Pro Skin Tattoo Academy Ltd | Education | 2025 |
| Pro Vantage Consulting Ltd | Professional & scientific | 2023 |
| Pro-Assist Northampton Ltd | Construction | 2011 |
| Pro-Io Limited | Information & communication | 2010 |
| Pro-Move Relocation Ltd | Transport & logistics | 2008 |
| Pro-Vale Pet Care Ltd | Other services | 2019 |
| Pro-Van Rent Ltd | Transport & logistics | 2022 |
| Pro-Win Consultancy Limited | Professional & scientific | 2011 |
| Proace Sports and Swimming Limited | Education | 2022 |
| Proace Sports Management Limited | Financial services | 2025 |
| Proaction Martial Arts (Bedford) Ltd | Arts & recreation | 2024 |
| Proaction Martial Arts (Coventry) Ltd | Arts & recreation | 2024 |
| Proaction Martial Arts (Grading) Ltd | Arts & recreation | 2024 |
| Proaction Martial Arts (Milton Keynes) Ltd | Arts & recreation | 2019 |
| Proaction Martial Arts (Northampton) Ltd | Arts & recreation | 2019 |
| Proaction Martial Arts Franchise Ltd | Administrative & support | 2019 |
| Proaction Martial Arts Ltd | Administrative & support | 2019 |
| Proactive Agency Ltd | Administrative & support | 2023 |
| Proactive Heating and Plumbing Ltd | Construction | 2017 |
| Proactive Integrated Services Limited | Professional & scientific | 2025 |
| Proactive Partners Limited | Professional & scientific | 2023 |
| Probitas Enterprise Solutions Limited | Information & communication | 2005 |