| Phronesim Ltd | Professional & scientific | 2019 |
| Physical.Graphics Ltd | Administrative & support | 2026 |
| PIG Disease Eradication Fund Limited(The) | Health & social care | 1983 |
| Piiuk Limited | Financial services | 2025 |
| Pittawaythompson Ltd | Real estate | 2021 |
| PK Midlands Ltd | Administrative & support | 2023 |
| Pksk Catering Ltd | Hospitality | 2026 |
| Place Partners Ltd | Professional & scientific | 2023 |
| Place Partners Management Ltd | Professional & scientific | 2026 |
| PLAN-2-EVOLVE Limited | Professional & scientific | 2020 |
| Plan-It Partnership Limited | Professional & scientific | 2012 |
| Planned Manufacturing & Engineering Ltd | Manufacturing | 2009 |
| Platinum Professional Cleaners Limited | Administrative & support | 2010 |
| Playford & Playfords Ltd | Health & social care | 2020 |
| Plus Accounting Ltd | Financial services | 2019 |
| Polaris Offshore Limited | Administrative & support | 2015 |
| Polaris Renewable Energy Ltd | Construction | 2026 |
| Polariz Ltd | Wholesale & retail | 2025 |
| Pollea Properties Limited | Real estate | 2016 |
| Polo Watch HK Company Limited | Administrative & support | 2021 |
| Polyabluka Ltd | Wholesale & retail | 2026 |
| Poolparty Software Ltd | Extraterritorial | 2018 |
| Portacell Limited | Construction | 2015 |
| Powderlux UK Ltd | Manufacturing | 2026 |
| Power UP Coaching Ltd | Education | 2021 |
| PQS Holdings Limited | Financial services | 2020 |
| PQS Services Limited | Professional & scientific | 2003 |
| Pragmatic Consulting Ltd | Education | 2013 |
| Pragmatic Investments Limited | Real estate | 2023 |
| Precise MED Co. Ltd | Administrative & support | 2023 |
| Premier Power Grid Ltd. | Administrative & support | 2015 |
| Premier Pedigree Services Limited | Administrative & support | 2021 |
| Premium Art Brands Ltd. | Wholesale & retail | 2010 |
| Premium Heating Plumbing & Cooling Limited | Construction | 2015 |
| Premium Ingredient Co., Ltd | Administrative & support | 2013 |
| Premium Training Limited | Construction | 2023 |
| Primary Soccer Limited | Arts & recreation | 2004 |
| Prime Education Network (PEN) Ltd | Professional & scientific | 2020 |
| Prime Lodging Ltd | Real estate | 2023 |
| PRIME4 Care Ltd | Administrative & support | 2016 |
| PRIME4 Logistics Co Ltd | Transport & logistics | 2021 |
| Primedriveuk Ltd | Education | 2026 |
| Printers Mews Limited | Wholesale & retail | 2016 |
| Priory Developments (Kenilworth) Limited | Real estate | 2010 |
| Privagov Ltd | Professional & scientific | 2025 |
| Pro Kids Ltd | Manufacturing | 2018 |
| Procasa Finance Limited | Extraterritorial | 2006 |
| Procter & Chester Measurements (Holdings) Limited | Financial services | 1984 |
| Procter & Chester Measurements (UK) Limited | Extraterritorial | 1984 |
| Procter and Chester (Measurements) Limited | Manufacturing | 1983 |
| Prodigy Pro Medical Limited | Administrative & support | 2024 |
| Proframe Procurement Limited | Professional & scientific | 2024 |
| Progress Nelson Lane Ltd | Financial services | 2023 |
| Project and Commercial Management Limited | Professional & scientific | 2019 |
| Project EYE Limited | Information & communication | 2014 |
| Projekt-M Limited | Professional & scientific | 2015 |
| Prologic Engineering Limited | Professional & scientific | 2022 |
| Promise Fastener Co., Limited | Manufacturing | 2019 |
| Promo Plastics Ltd | Wholesale & retail | 2019 |
| Promotions Palace Limited | Professional & scientific | 2016 |
| Property Rebourne Limited | Real estate | 2021 |
| Propty Maintenance Ltd | Construction | 2021 |
| Proserve Group Holdings Limited | Financial services | 2022 |
| Proserve Limited | Construction | 1994 |
| Protop International Limited | Administrative & support | 2022 |
| Prtg Consulting Ltd | Professional & scientific | 2018 |
| PSG Construction Limited | Construction | 2009 |
| Pthomesgroup Limited | Real estate | 2026 |
| PTI Worldwide Limited | Administrative & support | 2008 |
| PTX Trimble General Services Limited | Financial services | 2023 |
| PTX Trimble International Limited | Financial services | 2023 |
| PTX Trimble Technical Services Limited | Financial services | 2023 |
| Puccini Properties of Warwick Limited | Real estate | 2002 |
| Pumao Metal Co., Ltd | Administrative & support | 2020 |
| Purcell & Co Accountants Ltd | Professional & scientific | 2013 |
| Purple OHM Ltd | Information & communication | 2018 |
| Pusm Technology Co., Ltd | Administrative & support | 2020 |
| PWA Planning Group Ltd | Financial services | 2021 |
| PWA Planning Limited | Professional & scientific | 2013 |
| Pyuda Limited | Professional & scientific | 2011 |
| PZX Trading Ltd | Wholesale & retail | 2026 |
| Q&D Import and Export Co., Ltd | Extraterritorial | 2017 |
| Q&H Kenilworth Nail Ltd | Administrative & support | 2024 |
| QA FIX Ltd | Information & communication | 2010 |
| Qhotels Limited | Professional & scientific | 2003 |
| QHP (UK) Limited | Construction | 2010 |
| Qianying Trading Co., Limited | Administrative & support | 2023 |
| Qingdao Anda Pet Co., Ltd. | Professional & scientific | 2018 |
| Qingdao Aqua Coast Marine Service Co., Ltd | Administrative & support | 2025 |
| Qingdao Fulking Industrial and Trade Development Co., Ltd | Manufacturing | 2017 |
| Qingdao Hengsheng Automobile Co., Ltd | Administrative & support | 2025 |
| Qingdao Hengsheng Automobile Sales and Service Co., Ltd. | Administrative & support | 2025 |
| Qingdao Luhong Chemical Co., Ltd. | Administrative & support | 2025 |
| Qingdao Mermaid Hair Industry Co., Ltd | Extraterritorial | 2014 |
| Qingdao Ocean Safety Marine Service Co., Ltd | Manufacturing | 2025 |
| Qingdao Taifa Group Co., Ltd. | Wholesale & retail | 2017 |
| Qingdao Xinhai Tyre Co., Ltd | Wholesale & retail | 2011 |
| Qital UK Ltd | Extraterritorial | 2017 |
| Quad Consultancy Ltd | Professional & scientific | 2019 |
| Quansheng Trading Co., Ltd | Wholesale & retail | 2021 |