| Perfect Image Media Production Ltd | Professional & scientific | 2022 |
| Perfect Nails (North) Limited | Other services | 2013 |
| Perfect Pro Build Ltd | Construction | 2024 |
| Perfect U Limited | Arts & recreation | 2008 |
| Perfectly Pawsome Limited | Wholesale & retail | 2022 |
| Perficient Consulting Ltd | Administrative & support | 2022 |
| Performance Auto Limited | Wholesale & retail | 2025 |
| Performing Classics Ltd | Wholesale & retail | 2020 |
| Perfumo Ltd | Extraterritorial | 2025 |
| Peri Peri & Pizza Limited | Hospitality | 2025 |
| Peri Peri Grill & Pizza Bedford Ltd | Hospitality | 2026 |
| Periculo Property Solutions Limited | Real estate | 2015 |
| Periscope Holdings Ltd | Financial services | 2020 |
| PERMISSION2 CIC | Arts & recreation | 2023 |
| Permo Limited | Construction | 2017 |
| Perry's Fencing & Landscaping Ltd | Administrative & support | 2023 |
| Personalizewp Limited | Information & communication | 2023 |
| Personnel Dynamics Limited | Professional & scientific | 1994 |
| Petalie Properties Ltd | Real estate | 2025 |
| Pete Brennan Limited | Construction | 2006 |
| Pete Chandhar Promotions Limited | Arts & recreation | 2016 |
| Pete Gavin Securetech Limited | Construction | 2007 |
| Peter Boyce Investments Ltd | Real estate | 2019 |
| Peter Duncan Bespoke Builds Limited | Construction | 2026 |
| Peter J W Alexander Limited | Administrative & support | 2013 |
| Peterborough IT Services Limited | Information & communication | 2024 |
| Peterborough United Development Centre CIC | Education | 2025 |
| Petform London Limited | Administrative & support | 2023 |
| Petguardian Store Limited | Wholesale & retail | 2024 |
| Petit Bonbon Limited | Wholesale & retail | 2023 |
| Petite Etoile Ltd | Education | 2017 |
| Petits Cares Ltd | Health & social care | 2025 |
| Petrica Hugianu Limited | Construction | 2020 |
| Petrolheadonism DOT Club Limited | Arts & recreation | 2020 |
| Pezzi Sales Limited | Professional & scientific | 2018 |
| Pezzolite Limited | Real estate | 2020 |
| PFT Group Limited | Real estate | 2026 |
| PG Aerodesign Ltd | Professional & scientific | 2024 |
| PGA Management LLP | | 2007 |
| PH Global Enterprise Ltd | Real estate | 2023 |
| Phantom GRP Limited | Information & communication | 2025 |
| Pharma.Direct (UK & Europe) Limited | Administrative & support | 2008 |
| Pharmaclin Limited | Information & communication | 2014 |
| Pharmexcel Ltd | Professional & scientific | 2009 |
| Phase One Developments Ltd | Construction | 2019 |
| Phase Two Project Solutions Ltd | Information & communication | 2025 |
| PHASE-20 Electrical Contractors Ltd | Construction | 2020 |
| Phasedchange Limited | Information & communication | 2018 |
| Pheme Film Productions Ltd | Information & communication | 2023 |
| Phene Communications Ltd | Professional & scientific | 2024 |
| PHI Engineering and Design Ltd | Professional & scientific | 2017 |
| Phil Borg Retouching Limited | Professional & scientific | 2020 |
| Phil Deardon Brickwork Ltd | Construction | 2004 |
| Phil Maynard UK Limited | Professional & scientific | 2025 |
| Phil Owen Consultancy Ltd | Information & communication | 2014 |
| Phil Supple Lighting Design Ltd | Professional & scientific | 2023 |
| Phil&Teds UK Limited | Wholesale & retail | 2013 |
| Philex Electronic Limited | Wholesale & retail | 1997 |
| Philex Limited | Professional & scientific | 1982 |
| Philip Goodwin Limited | Administrative & support | 2002 |
| Philip Harkness Limited | Wholesale & retail | 2018 |
| Philip Judge Limited | Transport & logistics | 2007 |
| Philippa Scobie Accounting Limited | Professional & scientific | 2015 |
| Philippa Scobie Limited | Professional & scientific | 2020 |
| Phillips Floorcare Limited | Wholesale & retail | 2014 |
| Phillips Group Ltd | Administrative & support | 2019 |
| Phillips Planning Services Limited | Professional & scientific | 1992 |
| Philosoflight Ltd | Professional & scientific | 2015 |
| Phimonelle Ltd | Wholesale & retail | 2025 |
| Phinite Limited | Information & communication | 2013 |
| PHJ Business Solutions Ltd | Professional & scientific | 2026 |
| PHL Holdings Limited | Financial services | 2019 |
| Phoebe Latiffe Ltd | Wholesale & retail | 2020 |
| Phoenix Board Games Ltd | Wholesale & retail | 2020 |
| Phoenix Consulting Archaeology Limited | Professional & scientific | 1999 |
| Phoenix Crane Services Limited | Construction | 2020 |
| Phoenix Group Investments Limited | Real estate | 2023 |
| Phoenix Mode Limited | Financial services | 2012 |
| Phoenix S Cleaning Services Ltd | Administrative & support | 2023 |
| Phoenix UK Estate Planning Ltd | Real estate | 2024 |
| Phoenix UK Medicare Ltd | Health & social care | 2024 |
| Phoenix UK Property Limited | Real estate | 2024 |
| Phoka Ltd. | Health & social care | 2017 |
| Phon Audio Ltd | Manufacturing | 2018 |
| Phone Accessories and Gadgets Ltd | Wholesale & retail | 2022 |
| Phone Box 0007 Limited | Wholesale & retail | 2014 |
| Photography by Noble Ltd | Professional & scientific | 2020 |
| Photoreverie Limited | Professional & scientific | 2011 |
| Photovault Limited | Information & communication | 2001 |
| PHR Training Limited | Education | 2011 |
| Physiobedford Ltd | Other services | 2019 |
| PI (Physik Instrumente) Ltd | Wholesale & retail | 2008 |
| Piano Auctions Limited | Wholesale & retail | 2003 |
| Piazza Renovations Ltd | Construction | 2020 |
| Picanza Property Maintenance Limited | Construction | 2019 |
| Pick a Lily Florist Limited | Wholesale & retail | 2021 |
| Pico Y Rico Ltd | Hospitality | 2023 |
| Picot Limited | Health & social care | 2024 |
| PIE and Mash Limited | Hospitality | 2022 |
| Piecebypiecesolutions.Com Limited | Information & communication | 2016 |