| Planning Beats Limited | Information & communication | 2024 |
| Plant Deli Ltd | Health & social care | 2019 |
| Plant Hire Solutions Limited | Extraterritorial | 2014 |
| Plant Rentals Limited | Extraterritorial | 2016 |
| PLATFORM80 Ltd | Information & communication | 2019 |
| Platinum Roofing & Fascia Ltd | Construction | 2024 |
| Platinum World Travel Ltd | Administrative & support | 2017 |
| Play Away Ltd | Health & social care | 2024 |
| Play Gloucestershire | Health & social care | 2007 |
| Playable Gaming CIC | Health & social care | 2026 |
| Playful Strategies CIC | Education | 2025 |
| PLC Logical Solutions Ltd | Professional & scientific | 2022 |
| Pleasure US Studios Ltd | Information & communication | 2025 |
| Pleroma Hair & Beauty Ltd | Other services | 2015 |
| Plexus UK (First Project) Limited | Households | 1997 |
| PLR Churchdown Builders Limited | Construction | 2024 |
| Plumb Straight Ltd | Construction | 2025 |
| Plumbsmart Marlow Ltd | Construction | 2024 |
| Plumpy Cushions Ltd | Wholesale & retail | 2020 |
| Plunkett Associates Limited | Manufacturing | 2005 |
| Plus One Construction Ltd | Professional & scientific | 2015 |
| PM Event Support Ltd | Administrative & support | 2022 |
| PMA Maintenance and Landscaping Limited | Construction | 2024 |
| Pmans Services Limited | Health & social care | 2017 |
| PMB Consultants LLP | | 2012 |
| PMR Properties (UK) Ltd | Real estate | 2007 |
| Pneuma Power CME Ltd | Manufacturing | 2016 |
| Pneuma Roofing Limited | Construction | 2016 |
| Pocketsphere Ltd | Wholesale & retail | 2026 |
| Poems in the Waiting Room Limited | Information & communication | 2003 |
| Poeton (Cardiff) Limited | Manufacturing | 1953 |
| Poeton (Gloucester) Limited | Manufacturing | 1953 |
| Poeton Aptec Limited | Manufacturing | 1989 |
| Poeton Holdings Limited | Financial services | 2023 |
| Poeton Industries Limited | Manufacturing | 1930 |
| Pointdash Limited | Health & social care | 2015 |
| Poise Cleaning Services Ltd | Water & waste | 2023 |
| Polash Cuisine Limited | Hospitality | 2025 |
| Polash Restaurant Ltd | Hospitality | 2023 |
| Poligem Ltd | Other services | 2013 |
| Polo GIN Limited | Manufacturing | 2016 |
| Polo Pubs Limited | Hospitality | 2003 |
| Polo Times Limited | Information & communication | 2000 |
| Polymer Products (U.K.) Limited | Manufacturing | 1993 |
| Polymer Products Limited | Extraterritorial | 1996 |
| Polyram U.K. Limited | Manufacturing | 2004 |
| Pomesoft Limited | Information & communication | 2022 |
| Pontcanna Gate Limited | Wholesale & retail | 2024 |
| Poodle Ltd | Professional & scientific | 2014 |
| Pooky Lighting Limited | Wholesale & retail | 2013 |
| Poopesh Ltd | Hospitality | 2025 |
| Populus Market Ltd | Information & communication | 2026 |
| Porandla Properties Ltd | Real estate | 2019 |
| Pororot Solutions Ltd | Administrative & support | 2023 |
| Port-A-Pod Ltd | Administrative & support | 2025 |
| Portal Electrical & Security Ltd | Construction | 2023 |
| Porterdermed Limited | Health & social care | 2018 |
| Posa Care Solutions Limited | Health & social care | 2021 |
| Posh Taste Ltd | Hospitality | 2019 |
| Posi Support Services Limited | Health & social care | 2024 |
| Positive Pet Behaviour Ltd | Other services | 2019 |
| Positiverentalsoultions Ltd | Real estate | 2020 |
| Postcardsfromrachael Ltd | Arts & recreation | 2020 |
| Postsaver Europe Limited | Manufacturing | 2008 |
| Pouch Pals Limited | Health & social care | 2025 |
| POW Marketing Services Ltd | Wholesale & retail | 2019 |
| POW Standard Ltd | Wholesale & retail | 2019 |
| Powair Engineering Ltd | Professional & scientific | 2018 |
| Powder Pines Travel Ltd | Hospitality | 2025 |
| Power Flow Energy Ltd | Manufacturing | 2014 |
| Power Point (Glos) Ltd | Other services | 2002 |
| Powered Access Solutions (Southampton) Limited | Administrative & support | 2020 |
| Powered Access Solutions Limited | Administrative & support | 2018 |
| Powerjet (Glos) Limited | Administrative & support | 2009 |
| Poynton House Holdings Limited | Financial services | 2022 |
| PP Green Cleaners Ltd | Transport & logistics | 2024 |
| PPG Brands Ltd | Other services | 2021 |
| Pptb LLP | | 2023 |
| PR Facilities Management Limited | Wholesale & retail | 1999 |
| PR Global Holding Ltd | Hospitality | 2024 |
| PR Production Services Ltd | Arts & recreation | 2020 |
| PR31 Limited | Health & social care | 2016 |
| PRA Security Ltd | Administrative & support | 2021 |
| Practical GW Steam Limited | Manufacturing | 2012 |
| Practice Toolbox Limited | Professional & scientific | 2016 |
| Praesidium Consultancy Services Limited | Information & communication | 2017 |
| Prayag Limited | Education | 2016 |
| PRC IT Solutions Ltd | Information & communication | 2019 |
| Precision Builders Ltd | Construction | 2017 |
| Precision Geotechnical Ltd | Professional & scientific | 2025 |
| Precision Green Energy Solutions Ltd | Construction | 2021 |
| Precision Motor Care Gloucestershire Ltd | Wholesale & retail | 2024 |
| Precision Motorworks DVK Ltd | Manufacturing | 2026 |
| Precision Profiles Gloucester Limited | Manufacturing | 1996 |
| Precision Property Holdings Ltd | Financial services | 2021 |
| Prejemi Welding Engineering Consultancy Ltd | Professional & scientific | 2024 |
| Preloved of Cheltenham LLP | | 2020 |
| Prem JET Ltd | Administrative & support | 2026 |
| Premier Barbers Ltd | Other services | 2024 |
| Premier Consultants Limited | Professional & scientific | 2006 |