| Propertyserv Ltd | Construction | 2023 |
| Propertytd Ltd | Hospitality | 2024 |
| Prophetproperties Ltd | Real estate | 2025 |
| Propzii Lettings Ltd | Real estate | 2025 |
| Prospect Hospice Trading Limited | Wholesale & retail | 1999 |
| Prosper Community Ltd | Education | 2024 |
| Prosperity Assets Ltd | Financial services | 2024 |
| Prospero Theatre Community Interest Company | Arts & recreation | 2015 |
| Protext Limited | Households | 2021 |
| Protomaker Limited | Professional & scientific | 2020 |
| Prototek Machining Ltd | Manufacturing | 2011 |
| Protube Hire & Sales Ltd | Administrative & support | 2021 |
| Proud Productions Limited | Education | 2013 |
| Provatee Ltd | Real estate | 2017 |
| Provenist Ltd | Hospitality | 2018 |
| Provert Limited | Administrative & support | 2005 |
| Providence Health Care Limited | Health & social care | 2022 |
| Proviloops International Ltd | Information & communication | 2026 |
| Provim Ltd | Professional & scientific | 2021 |
| Provision Tax Limited | Extraterritorial | 2016 |
| PRY Farm Ltd | Financial services | 2022 |
| Pryzm Design Ltd | Construction | 2023 |
| PS Connections Ltd | Construction | 2025 |
| PS HV Contracts Ltd | Administrative & support | 2019 |
| PS Mortgages Ltd | Financial services | 2023 |
| PS Swindon Ltd | Wholesale & retail | 2019 |
| PS Utility Consultancy Ltd | Construction | 2023 |
| PSB Construction & Property Developments Ltd | Construction | 2023 |
| PSB Design Ltd | Professional & scientific | 2025 |
| PSC Utility Ltd | Construction | 2021 |
| PSI Displays Limited | Wholesale & retail | 2017 |
| PSL Delivery Ltd | Transport & logistics | 2024 |
| PSM Holdings Limited | Manufacturing | 2016 |
| PSM Property Holdings Ltd | Real estate | 2024 |
| PST Property Investments Ltd | Real estate | 2026 |
| Pswh Limited | Professional & scientific | 2018 |
| Psychic Productions Ltd | Administrative & support | 2024 |
| PT Academy Swindon Ltd | Arts & recreation | 2020 |
| PT Housing Ltd | Real estate | 2018 |
| PTL Holdings Limited | Financial services | 2021 |
| PTL Investments Limited | Real estate | 2026 |
| PTS Calibrations Ltd | Manufacturing | 2015 |
| Public Clarity Limited | Information & communication | 2025 |
| Pucka Pads Ltd | Real estate | 2018 |
| Puffledot Retail Limited | Wholesale & retail | 2019 |
| Pugh Kerry Limited | Professional & scientific | 2018 |
| Pulsa Ltd | Wholesale & retail | 2025 |
| Pulse Power and Measurement Limited | Manufacturing | 1994 |
| Pulse Property Management South West Ltd | Households | 2025 |
| Pump Nutrition Ltd | Manufacturing | 2024 |
| Pump World Limited | Wholesale & retail | 1989 |
| Puncture Control Limited | Wholesale & retail | 2023 |
| Punjabi Food Junction Ltd | Hospitality | 2025 |
| Punjabi Foodz Limited | Hospitality | 2026 |
| Pure 2 O Ltd | Extraterritorial | 1996 |
| Pure Blue Heating Ltd | Construction | 2024 |
| Pure Green Limited | Wholesale & retail | 2021 |
| Pure House Limited | Construction | 2013 |
| Pure Paraplanning Ltd | Financial services | 2017 |
| Purecare Professional Solutions UK Ltd | Administrative & support | 2025 |
| Purefixpro Limited | Administrative & support | 2025 |
| Purely Recruitment Solutions Limited | Administrative & support | 2012 |
| Purely Supplements Ltd | Wholesale & retail | 2024 |
| Puretidy Limited | Administrative & support | 2024 |
| Purifixpro Ltd | Administrative & support | 2023 |
| Purity Care Ltd | Administrative & support | 2012 |
| Purity Catering Services Ltd | Hospitality | 2019 |
| Purl Coffee Products Limited | Wholesale & retail | 2017 |
| Purple Giraffe Properties Ltd | Real estate | 2025 |
| Purple Phoenix Consulting Services Ltd | Professional & scientific | 2024 |
| Purple PIG Group Ltd | Administrative & support | 2024 |
| Purple Tesseract Ltd | Real estate | 2023 |
| Purpleroyaltymedical Ltd | Public administration | 2023 |
| Pursuit Digital Ltd | Professional & scientific | 2022 |
| Purton Barn Ltd | Other services | 2017 |
| Purton Carpentry Limited | Construction | 2006 |
| Purton Farm Shop Limited | Wholesale & retail | 2012 |
| Purton House Organics Limited | Agriculture & fishing | 2024 |
| Purton PG Ltd | Hospitality | 2025 |
| Purton Thai Limited | Extraterritorial | 2023 |
| Push Your Limits Ltd | Wholesale & retail | 2023 |
| Puzzle Solved Limited | Administrative & support | 2014 |
| PVR Services Water Engineering Ltd | Construction | 2026 |
| PWB Building Services Limited | Construction | 2026 |
| PWR Recycling Ltd. | Water & waste | 1996 |
| PWS Pictures Limited | Information & communication | 2006 |
| PWS Repair and Spray Ltd | Wholesale & retail | 2020 |
| PX Wealth Limited | Financial services | 2010 |
| Pxgh Limited | Financial services | 2021 |
| PY Electronics Ltd | Wholesale & retail | 2019 |
| PY Surgery Limited | Health & social care | 2011 |
| Pycese Ltd | Wholesale & retail | 2025 |
| Pycrobo Ltd | Information & communication | 2025 |
| Pyxcel Ltd | Information & communication | 2023 |
| Q & S Property Management Ltd | Households | 2022 |
| Q a Contractors Limited | Administrative & support | 1996 |
| Q and a Equine Services Ltd | Agriculture & fishing | 2024 |
| Q CHI Limited | Information & communication | 2001 |
| Q'Counts Limited | Extraterritorial | 2025 |
| Q-Strides Ltd | Administrative & support | 2019 |