| Pomim Building Limited | Construction | 2024 |
| Pomodori Limited | Wholesale & retail | 2018 |
| Pomp Shop Limited | Wholesale & retail | 2022 |
| Pond Cross Ltd. | Real estate | 2026 |
| Pond Head Management Limited | Households | 2011 |
| Ponnar Consultancy Ltd | Information & communication | 2022 |
| Pont Andrew Limited | Energy | 2012 |
| Pontis Reach Ltd | Arts & recreation | 2024 |
| Pontnewydd Consulting Ltd | Professional & scientific | 2017 |
| Ponyworks Limited | Administrative & support | 2017 |
| Pool & Spa Manufacturing Limited | Administrative & support | 2022 |
| Pool App Ltd | Information & communication | 2026 |
| Pool Barton Keynsham Management Company Limited | Households | 2009 |
| Pool Road Takeaway Ltd | Hospitality | 2025 |
| Pooles Wharf (Bristol) Management Limited | Households | 1996 |
| POP Biscuits Ltd | Wholesale & retail | 2017 |
| POP UP and Events Hire Ltd | Hospitality | 2024 |
| Popbox Ltd. | Arts & recreation | 2014 |
| Popcomms Ltd | Information & communication | 2022 |
| Popeleiparade Productions Ltd | Arts & recreation | 2011 |
| Popetech Consulting Ltd | Information & communication | 2015 |
| Poplar Access Scaffolding Ltd | Construction | 2014 |
| Poplar Financial Services Limited | Financial services | 2012 |
| Poplar Insulation (Cardiff) Limited | Construction | 2011 |
| Poplar Insulation Ltd | Construction | 1998 |
| Popnmunch Limited | Hospitality | 2025 |
| Poppadoms Pickles Ltd | Hospitality | 2025 |
| Popped Corn Bytes Limited | Information & communication | 2024 |
| Poppin Pubs Ltd | Hospitality | 2025 |
| Poppy Rose Art Ltd | Wholesale & retail | 2026 |
| Poppyfields Management Limited | Households | 1989 |
| Popsis Medical Ltd | Health & social care | 2022 |
| Popular Living Ltd | Real estate | 2018 |
| Popup Pitstop Ltd | Professional & scientific | 2026 |
| Poquito Coffee Ltd | Hospitality | 2022 |
| Porcelain Feathers Limited | Manufacturing | 2025 |
| Porch Cleaners Limited | Administrative & support | 2025 |
| Porcupine Consulting Limited | Real estate | 2022 |
| Porcupineica Ltd | Hospitality | 2018 |
| Porschemode LLP | | 2019 |
| Port Dundas Battery Storage Limited | Energy | 2024 |
| Port Eliot Festival Ltd | Arts & recreation | 2009 |
| Port Marine Bathrooms Limited | Construction | 2010 |
| Port Marine Cleaning Limited | Administrative & support | 2020 |
| Port Marine Kitchens & Bedrooms Ltd | Construction | 2023 |
| Port Mirage LLP | | 2010 |
| Port O'Bristol Ltd | Transport & logistics | 2025 |
| Portal Toolkit Ltd | Information & communication | 2023 |
| Portarlington Services Limited | Professional & scientific | 2019 |
| Portberry Consulting Ltd | Information & communication | 2025 |
| Portbury Surfacing Limited | | 1981 |
| Portbury Village Hall Limited | Hospitality | 2011 |
| Portch Consultancy Ltd | Financial services | 2015 |
| Portch Family LLP | | 2025 |
| Portcliff Building Services Limited | Construction | 1998 |
| Portcullis Bidco Limited | Financial services | 2024 |
| Portcullis Midco Limited | Financial services | 2024 |
| Portcullis Topco Limited | Financial services | 2024 |
| Porter's Cardiff LLP | | 2012 |
| Porter's Enterprises of Bristol Limited | Manufacturing | 2012 |
| Porterglobal Limited | Professional & scientific | 2014 |
| Porteza Ltd | Real estate | 2023 |
| Portferry Ventures Ltd | Professional & scientific | 2007 |
| Portfolio Properties B R S Limited | Construction | 2012 |
| Portfolio Property Ltd | Real estate | 2018 |
| Portfolio Solutions (Northern Ireland) Limited | Construction | 2002 |
| Porthia Vision Services Limited | Other services | 2013 |
| Porthilly Limited | Professional & scientific | 2021 |
| Porthilly Marketing & Digital Ltd | Professional & scientific | 2024 |
| Portingale Brand & Communications Ltd | Professional & scientific | 2025 |
| Portisbar Ltd | Hospitality | 2024 |
| Portisbeds Limited | Wholesale & retail | 2014 |
| Portishead Brewing Co Ltd | Manufacturing | 2018 |
| Portishead Carnival Committee - Posset Events CIC | Hospitality | 2024 |
| Portishead Catering Limited | Hospitality | 2017 |
| Portishead Christmas Lights CIC | Health & social care | 2023 |
| Portishead Consulting Limited | Professional & scientific | 2023 |
| Portishead Engineering and Construction Limited | Manufacturing | 2002 |
| Portishead Eyecare Limited | Health & social care | 2017 |
| Portishead Groundworx Ltd | Construction | 2016 |
| Portishead Group Limited | Construction | 2016 |
| Portishead House Management Company Ltd | Real estate | 2019 |
| Portishead Industries Limited | Manufacturing | 1995 |
| Portishead Investments Limited | Real estate | 1955 |
| Portishead Market Ltd | Wholesale & retail | 2026 |
| Portishead Media Limited | Professional & scientific | 2025 |
| Portishead Nails Ltd | Other services | 2019 |
| Portishead Nautical Trust(The) | Health & social care | 1906 |
| Portishead Pool Community Trust | Arts & recreation | 2008 |
| Portishead Roofing Services Ltd | Construction | 2022 |
| Portishead Sushi Ltd | Hospitality | 2024 |
| Portishead Tennis Club Limited | Arts & recreation | 2023 |
| Portishead Town Football Club Limited | Arts & recreation | 2020 |
| Portishomes Limited | Real estate | 2020 |
| Portland 88 Management Company Limited | Real estate | 2018 |
| Portland Brown Limited | Hospitality | 2005 |
| Portland Corporate Solutions Limited | Professional & scientific | 2013 |
| Portland Court Limited | Real estate | 2003 |
| Portland Heights (Staple Hill) Management Limited | Households | 2020 |
| Portland Heights Management Company (Bristol) Limited | Real estate | 2013 |