| Page Melia PR Limited | Professional & scientific | 2018 |
| Paint Station UK Ltd | Wholesale & retail | 2025 |
| Painting and Decorating Contractors Limited | Construction | 2014 |
| Paintstar Decoration Ltd | Construction | 2020 |
| Pairwel Ltd | Health & social care | 2025 |
| Paisleys Property Management Ltd | Real estate | 2025 |
| PAL Construction (Swindon) Limited | Construction | 2014 |
| Palani IT Consultancy Limited | Information & communication | 2015 |
| Palha Trading Ltd | Wholesale & retail | 2024 |
| Paloma Ribeiro Limited | Education | 2022 |
| Pampal Courier Ltd | Transport & logistics | 2023 |
| PAN Dulce Ltd | Real estate | 2024 |
| Panacea Products Ltd | Manufacturing | 2014 |
| Panashe Properties Ltd | Real estate | 2018 |
| Panayiodou Health Ltd | Wholesale & retail | 2014 |
| Panbio Limited | Manufacturing | 2010 |
| Pancox Limited | Financial services | 1959 |
| Panelcraft UK Limited | Wholesale & retail | 2006 |
| Pankita Solutions Ltd | Administrative & support | 2015 |
| Panku Swindon West Ltd | Hospitality | 2023 |
| Pannoy (Portswood) Ltd | Wholesale & retail | 2017 |
| Pannoy (Southampton) Ltd | Wholesale & retail | 2024 |
| Panoramic Bathrooms Limited | Wholesale & retail | 2019 |
| Pantazeus Logistics Ltd | Transport & logistics | 2026 |
| Pantechnicon Holdings Ltd | Real estate | 2023 |
| Paone Bath Homes Ltd | Households | 2026 |
| Paone Bath Properties Ltd | Real estate | 2026 |
| Papa Creative Builders Limited | Construction | 2002 |
| Papa Developments Limited | Real estate | 2003 |
| Papercycle Limited | Professional & scientific | 2021 |
| Papifyshop Ltd | Wholesale & retail | 2022 |
| Paradigm Core Ltd | Professional & scientific | 2024 |
| Paragon Costs Solutions Limited | Professional & scientific | 2011 |
| Paragon Print Limited | Manufacturing | 2011 |
| Paragon Services Limited | Professional & scientific | 2014 |
| Paramount (Swindon) Management Company Limited | Households | 2005 |
| Paramount Engineering Solutions Limited | Professional & scientific | 2011 |
| Paramount Interiors UK Ltd | Construction | 2009 |
| Paramount Properties (Swindon) Limited | Households | 2021 |
| Paranoid Piranha Ltd | Information & communication | 2002 |
| Parc Pensarn Management Company Limited | Real estate | 2012 |
| Parcel Delivery Limited | Other services | 2020 |
| Parcelpath Transport Limited | Transport & logistics | 2025 |
| Park Apartments Swindon Limited | Real estate | 2002 |
| Park Flooring Limited | Administrative & support | 2007 |
| Park House (Devizes) Limited | Households | 1983 |
| Park Lane (Chippenham) Flats Limited | Hospitality | 1990 |
| Park Lane Food Swindon Limited | Hospitality | 2024 |
| Park South Dental Care Limited | Health & social care | 2010 |
| Park View Management Company Swindon Limited | Other services | 2016 |
| Parkease Parking Limited | Hospitality | 2025 |
| Parker and Parker Productions Limited | Information & communication | 2015 |
| Parker Parish Limited | Real estate | 2001 |
| Parkhouse Estates Holdings Limited | Financial services | 2019 |
| Parmar Property Development Limited | Real estate | 2006 |
| Parnham Accounting Services Limited | Professional & scientific | 2013 |
| Pars Development Building Limited | Construction | 2021 |
| Pars Development Construction 2 Limited | Construction | 2025 |
| Pars Development Construction Limited | Construction | 2024 |
| Pars Development Finance Limited | Construction | 2024 |
| Pars Development Property Limited | Construction | 2021 |
| Parte.App Ltd | Information & communication | 2026 |
| Particularity Ltd | Professional & scientific | 2019 |
| Parties and Platters Ltd | Hospitality | 2025 |
| Partners Employment European Recruitment Limited | Administrative & support | 2005 |
| Partridge Security Ltd | Administrative & support | 2020 |
| Party Ideas Limited | Extraterritorial | 2014 |
| Party Ideas UK Limited | Arts & recreation | 2012 |
| Party Planned Limited | Manufacturing | 2023 |
| Pasat Bild Solution Ltd | Construction | 2026 |
| Pashev Limited | Hospitality | 2024 |
| Pasos Consulting Limited | Information & communication | 2016 |
| Pass My Parcel Limited | Professional & scientific | 2014 |
| PAT Brabazon Limited | Construction | 2014 |
| Patchnet UK Limited | Information & communication | 2025 |
| Patel & Bhakta Limited | Hospitality | 2016 |
| Pathway Property Limited | Real estate | 2022 |
| Pathway Property Rentals Limited | Real estate | 2025 |
| Pathways 4 Learning Limited | Administrative & support | 2024 |
| Patience Carehealth Ltd | Health & social care | 2018 |
| Patjo Ltd | Wholesale & retail | 2024 |
| Patriciatransport Ltd | Transport & logistics | 2025 |
| Patrick Randall & Partners Ltd | Professional & scientific | 2012 |
| Patriot Holdings Ltd | Hospitality | 2024 |
| Patronus Consulting Limited | Professional & scientific | 2006 |
| Patti's Reformers Pilates Limited | Arts & recreation | 2024 |
| Paudel and RAI Ltd | Hospitality | 2017 |
| Paul Bailey Catering Consultancy Ltd | Professional & scientific | 2020 |
| Paul Cook Construction Limited | Construction | 2002 |
| Paul D Mundy DL Limited | Construction | 2009 |
| Paul Franklin Ltd | Financial services | 2012 |
| Paul Helps Ltd | Administrative & support | 2003 |
| Paul King Limited | Professional & scientific | 2006 |
| Paul Lewis Residential Limited | Real estate | 2025 |
| Paul Lloyd Limited | Professional & scientific | 1986 |
| Paul Mutlow Drywall Finishers Limited | Professional & scientific | 2022 |
| Paul Sandry Plastering Ltd | Construction | 2019 |
| Paul Spink Consulting Limited | Professional & scientific | 2015 |
| Paul Varey Property Maintenance Limited | Construction | 2025 |
| Paul Woolford Carpentry Limited | Construction | 2006 |