| Prescribe ME NOW Limited | Health & social care | 2024 |
| Prestige Card Collectibles Limited | Wholesale & retail | 2024 |
| Preston Gill Holdings Ltd | Real estate | 2023 |
| Preston Gill Limited | Real estate | 2024 |
| Pretty Planter Ltd | Manufacturing | 2021 |
| Prevantis Lifesci Ltd | Wholesale & retail | 2026 |
| Priano LLP | | 2011 |
| Price & SON (Independent Family Funeral Directors) Limited | Other services | 2018 |
| Price & SON Limousine Services Ltd | Other services | 2020 |
| Prideaux Nameco Limited | Financial services | 2024 |
| Primary Ultrasound Ltd | Health & social care | 2011 |
| Prime Comfort Ltd | Other services | 2021 |
| Prime Group Investments Ltd | Real estate | 2022 |
| Prime Property Capital Limited | Real estate | 2021 |
| Prime Therapy Clinic Ltd | Health & social care | 2017 |
| Print Bureau Team Limited | Manufacturing | 2008 |
| Prisma Podiatry Ltd | Health & social care | 2024 |
| Pro Building Control Limited | Professional & scientific | 2017 |
| Pro Smart Ltd | Wholesale & retail | 2011 |
| Proactive Procurement UK Limited | Real estate | 2016 |
| Process Line Engineering Limited | Professional & scientific | 2026 |
| Proctors Cleaning Services Ltd | Administrative & support | 2020 |
| Procure Fire Solutions Ltd | Professional & scientific | 2024 |
| Procurio Ltd | Wholesale & retail | 2025 |
| Professional Thai Food Limited | Hospitality | 2014 |
| Proframecrm Limited | Information & communication | 2025 |
| Progressive Lettings Ltd | Real estate | 2021 |
| Project Energy Consultants Limited | Professional & scientific | 2017 |
| Project Monday Limited | Professional & scientific | 2001 |
| Prompt Smart Repairs Ltd | Wholesale & retail | 2020 |
| Properly Done Ltd | Real estate | 2026 |
| Propero Consulting Limited | Professional & scientific | 2015 |
| Property by 7 Ltd | Real estate | 2024 |
| Property Sync Ltd | Real estate | 2021 |
| Protask Partners Limited | Professional & scientific | 2025 |
| Protec Mobility Trading Ltd | Wholesale & retail | 2008 |
| Proteon Markets Limited | Wholesale & retail | 2025 |
| PSH Management Ltd | Households | 2025 |
| PTB Refinishing Ltd | Wholesale & retail | 2024 |
| PTS Properties Limited | Households | 2020 |
| Ptw-Uk Limited | Professional & scientific | 2008 |
| Puggeasabi Ltd | Administrative & support | 2019 |
| Pugilistic Corporate Strategies Limited | Financial services | 2009 |
| Pumpherston Estates Limited(The) | Agriculture & fishing | 1928 |
| Pure Natural Products Limited | Administrative & support | 2000 |
| Pure Sports Media Limited | Information & communication | 2014 |
| Purple Foods Ltd | Professional & scientific | 2010 |
| PVP Properties (Grantham) Limited | Real estate | 2023 |
| PVS Media Ltd | Information & communication | 2017 |
| Pydar Limited | Information & communication | 2022 |
| Pygott & Crone Commercial Limited | Real estate | 2011 |
| Pygott & Crone Lettings Limited | Real estate | 2018 |
| Pyneapple Limited | Hospitality | 2003 |
| Q.K. (Holdings) Limited | Financial services | 1984 |
| Q.K. Cold Stores (Marston) Limited | Manufacturing | 1984 |
| QG Trading Limited | Wholesale & retail | 2001 |
| QJ Bradshaw Ltd | Administrative & support | 2022 |
| Quality Chippy Limited | Hospitality | 2025 |
| Quantum Fleet Management Limited | Professional & scientific | 2014 |
| Qucloud Ltd | Information & communication | 2026 |
| Quercus Beaufort Ltd | Professional & scientific | 2014 |
| Quickstone Midlands Limited | Mining & quarrying | 1996 |
| Quodex Limited | Information & communication | 2018 |
| Quot 33 Ltd | Hospitality | 2025 |
| QV CC Limited | Wholesale & retail | 2020 |
| R & H Taylor Properties Ltd | Real estate | 2017 |
| R & V Property Ltd | Real estate | 1997 |
| R D and J a Howard Limited | Financial services | 2015 |
| R F Logistical Movement Limited | Transport & logistics | 2019 |
| R F P D Limited | Professional & scientific | 2020 |
| R H Stott Haulage Ltd | Transport & logistics | 2010 |
| R Howard Engineering Limited | Manufacturing | 2014 |
| R N D Engineering Limited | Wholesale & retail | 2007 |
| R S News Limited | Wholesale & retail | 2026 |
| R&L Lord Limited | Professional & scientific | 2018 |
| R. H. Lamyman Limited | Agriculture & fishing | 1965 |
| R. Jarvis (Industrial Properties) Limited | Real estate | 1911 |
| R. Jarvis Limited | Hospitality | 2013 |
| R.G. Reynolds & Associates LLP | | 2006 |
| R.G. Simpson Limited | Agriculture & fishing | 1952 |
| Race Ready Coaching Ltd | Professional & scientific | 2025 |
| Racingtd Ltd | Arts & recreation | 2025 |
| Radford Investments Limited | Financial services | 2017 |
| Radford Plumbing and Heating Ltd | Construction | 2024 |
| Radha Groups Ltd | Transport & logistics | 2021 |
| Rafal.K.Smartrepairs Ltd | Wholesale & retail | 2025 |
| Rafiki London Limited | Professional & scientific | 2018 |
| Rahims Ltd | Health & social care | 2014 |
| Rahumiv Ltd | Wholesale & retail | 2021 |
| Railbat Ltd | Information & communication | 2025 |
| Rainy Fuels Ltd | Wholesale & retail | 2024 |
| Rainy Retail Ltd | Wholesale & retail | 2018 |
| Rajaluxmy Properties Ltd | Real estate | 2024 |
| Ramesh Surgery Limited | Health & social care | 2015 |
| Rana & Pubs Ltd | Hospitality | 2025 |
| Rana Home Healthcare Ltd | Health & social care | 2026 |
| Ranquin Holdings Limited | Financial services | 2025 |
| Ranquin Underwriting Limited | Financial services | 1999 |
| RAS Grantham Limited | Real estate | 2019 |
| Rauxa Limited | Other services | 2001 |