| Psychiatry Ltd | Health & social care | 2017 |
| Psychmd Limited | Health & social care | 2023 |
| PT Kids Limited | Health & social care | 2019 |
| PT Mechanical Services Ltd | Wholesale & retail | 2021 |
| PTC Commercial Ltd | Transport & logistics | 2015 |
| PTC Services Ltd | Construction | 2023 |
| PTI (UK) Limited | Professional & scientific | 1995 |
| PTM Trans Ltd | Transport & logistics | 2025 |
| PTR Wills & Probate Limited | Professional & scientific | 2025 |
| PTS Industrial and Pipeline Technologies UK Limited | Manufacturing | 2021 |
| PTS Logistics Ltd | Transport & logistics | 2022 |
| PTS Mechanical Services Ltd | Professional & scientific | 2026 |
| PTW Developments Limited | Construction | 2018 |
| PTW Holdings Limited | Financial services | 2018 |
| PTW Lodges Limited | Hospitality | 2025 |
| Public Hair & Beauty Ltd | Other services | 2018 |
| Pucyu Limited | Transport & logistics | 2012 |
| Puddings by Post Ltd | Wholesale & retail | 2015 |
| Puddingstone Labs Limited | Extraterritorial | 2026 |
| Puiu Driver Ltd | Administrative & support | 2016 |
| Pukka Heating Ltd | Construction | 2025 |
| Pullman Fleet Solutions Limited | Wholesale & retail | 2017 |
| Pulse EV Ltd | Manufacturing | 2020 |
| Pumpbrew Ltd | Hospitality | 2025 |
| Punches, Dies and Blades Limited | Manufacturing | 1996 |
| Punctilious Safety Ltd | Other services | 2022 |
| Punka Properties Ltd | Real estate | 2018 |
| Puplaks Constructors Ltd | Construction | 2018 |
| Puppy Pet Care Ltd | Agriculture & fishing | 2020 |
| Purchasing Management Services Limited | Education | 1999 |
| Purdy Fire Safety Ltd | Financial services | 2023 |
| Pure and Pure Ltd | Wholesale & retail | 2012 |
| Pure Beverages Limited | Hospitality | 2012 |
| Pure Comfort Mobility Limited | Wholesale & retail | 2025 |
| Pure Etch Ltd | Professional & scientific | 2021 |
| Pure Flame Boilers Ltd | Construction | 2021 |
| Pure Motion Health Limited | Health & social care | 2024 |
| Pure Salt Therapy Ltd | Other services | 2026 |
| Pure Shine Cleaning Services Ltd | Administrative & support | 2023 |
| Pure Trucks Yorkshire Ltd | Transport & logistics | 2024 |
| Pureblissuk Limited | Wholesale & retail | 2024 |
| Pureearth Dynamics Ltd | Extraterritorial | 2025 |
| Purehaus Projects Ltd | Construction | 2025 |
| Puremorrow Homecare Ltd | Extraterritorial | 2026 |
| Puresoftware Private Limited | Information & communication | 2007 |
| Purestart Properties Ltd | Real estate | 2024 |
| Purevitam Ltd | Manufacturing | 2024 |
| Pureweld Limited | Manufacturing | 2003 |
| Purewell Medical Solutions Ltd | Extraterritorial | 2025 |
| Purity Cleaning Services UK Limited | Administrative & support | 2024 |
| Purosangue Ltd | Financial services | 2024 |
| Purple Leaf Properties Ltd | Real estate | 2024 |
| Purple Ledge Ltd | Professional & scientific | 2023 |
| Purple Mighty Ltd | Health & social care | 2022 |
| Purpose and Trust Limited | Financial services | 2021 |
| Purposeful Tribe CIC | Administrative & support | 2024 |
| Pushops Innovations Ltd | Information & communication | 2026 |
| Puzl Cloud Ltd | Information & communication | 2025 |
| PV Techniek LLP | | 2016 |
| PVM Investments Limited | Real estate | 2001 |
| Pvstransport Ltd | Transport & logistics | 2025 |
| PW & M Ltd | Wholesale & retail | 2017 |
| PW Retail Consultancy Ltd | Professional & scientific | 2020 |
| PW Rigging Services Limited | Construction | 2014 |
| Pw's Creative Ltd | Manufacturing | 2023 |
| Pynetm Ltd | Public administration | 2025 |
| Pyramid Developments & Lettings Ltd | Construction | 2025 |
| Pyro Fire Engineering Ltd | Public administration | 2018 |
| Pyro Fire Holdings Ltd | Professional & scientific | 2021 |
| Pyro Fire Ltd | Public administration | 2011 |
| PZ Lettings Ltd | Real estate | 2025 |
| Q-Line Services Limited | Construction | 2019 |
| Q-Tron Limited | Extraterritorial | 2016 |
| Q.C. Engineering & Design Limited | Manufacturing | 1996 |
| Qadian Bazar Ltd | Wholesale & retail | 2025 |
| Qaisar Taxi Services Ltd | Transport & logistics | 2026 |
| Qaseem Gems & Jewellery UK Ltd | Manufacturing | 2025 |
| Qcd-Performance Limited | Professional & scientific | 2016 |
| Qictoks Ltd | Professional & scientific | 2021 |
| QK Textiles Ltd | Wholesale & retail | 2024 |
| Qlar UK (Clyde) Limited | Manufacturing | 2005 |
| QM1918 Ltd | Extraterritorial | 2021 |
| Qr-Signs Ltd | Manufacturing | 2026 |
| QS Mortgage Brokers Ltd | Financial services | 2003 |
| QS Mortgages Limited | Extraterritorial | 2010 |
| Quad Technology Group Ltd | Financial services | 2018 |
| Qualia Solutions Limited | Professional & scientific | 2010 |
| Qualis Optimum IT Services Ltd | Information & communication | 2021 |
| Quality Cleaning Ltd | Administrative & support | 2025 |
| Quality Construction & Scaffolding Ltd. | Construction | 2009 |
| Quality Life Mobility Ltd | Wholesale & retail | 2003 |
| Quality Service Fitters Ltd | Other services | 2023 |
| Quality Service Solutions Limited | Professional & scientific | 2011 |
| Quality Systems Solutions Limited | Professional & scientific | 2017 |
| Qualter Creative Limited | Professional & scientific | 2025 |
| Quando Drinks Limited | Wholesale & retail | 2014 |
| Quando Holdings Limited | Financial services | 2017 |
| Quanta Nest Limited | Extraterritorial | 2026 |
| Quantaris Labs Ltd | Extraterritorial | 2026 |
| Quantinova Ltd | Information & communication | 2025 |