| Project Cornwall Bidco Limited | Financial services | 2020 |
| Project Cornwall Topco Limited | Financial services | 2020 |
| Project Focus (UK) Ltd | Professional & scientific | 2010 |
| Project Management Information Services Ltd | Information & communication | 2019 |
| Project Pilates Studios Limited | Arts & recreation | 2025 |
| Proofstack Health Ltd | Information & communication | 2026 |
| Property 411 Limited | Real estate | 2019 |
| Property Counsellors Limited | Real estate | 2017 |
| Property Network Solutions (UK) Ltd | Real estate | 2026 |
| Property Services (Midlands) Limited | Other services | 1991 |
| Property Surveys Ltd | Professional & scientific | 2016 |
| Propweb Limited | Information & communication | 2020 |
| Prosec Medical Ltd | Administrative & support | 2023 |
| Protherm Engineering (Shenstone) Limited | Professional & scientific | 1998 |
| Protherm Engineering Holdings Limited | Professional & scientific | 2014 |
| Protocol Exploration Limited | Mining & quarrying | 2025 |
| Proudfoot Projects Limited | Construction | 2012 |
| Proxim IT Ltd | Information & communication | 2017 |
| Proxy IT Limited | Professional & scientific | 2015 |
| Pryce Holdings Ltd | Extraterritorial | 2003 |
| Pscm Insulation & Fabrication Limited | Construction | 2011 |
| Psi-Clone Games Ltd | Information & communication | 2007 |
| Psig Ltd | Information & communication | 2009 |
| PSJ Electrics Ltd | Construction | 2022 |
| PSL Engineering Sales Limited | Professional & scientific | 2010 |
| PSO Assist Limited | Information & communication | 2026 |
| Psychology Consultancy Services Limited | Professional & scientific | 2012 |
| Psyservices Limited | Professional & scientific | 2012 |
| PTE Properties Limited | Construction | 2023 |
| Pteromyini Ltd | Transport & logistics | 2019 |
| PTL Fire & Security Ltd | Public administration | 2017 |
| PTL Voice and Data Limited | Information & communication | 2013 |
| Ptolemy Resource Capital Limited | Professional & scientific | 2013 |
| Pump Express Limited | Wholesale & retail | 2015 |
| Pure Beauty Online Services Ltd | Wholesale & retail | 2008 |
| Pure Eco Support Limited | Construction | 2024 |
| Pure Hair Company (UK) Ltd | Health & social care | 2018 |
| Pure Leisure Marketing LLP | | 2012 |
| Purefill UK Limited | Manufacturing | 2024 |
| Pyramid Media Limited | Information & communication | 2003 |
| QA Comprehensive Limited | Manufacturing | 2021 |
| Qadence Ltd | Information & communication | 2025 |
| Qbic 3 Ltd | Professional & scientific | 2026 |
| Qdts Properties Limited | Construction | 2018 |
| QI Holdings Ltd | Wholesale & retail | 2015 |
| Qmin Home Dining Group Ltd | Hospitality | 2024 |
| Qmin Restaurant Group Ltd | Hospitality | 2024 |
| QSA Media Ltd | Information & communication | 2021 |
| Qualis Bids & Tenders Ltd | Professional & scientific | 2021 |
| Qualis Solutions Ltd | Professional & scientific | 2020 |
| Quality Carezone Services Ltd | Health & social care | 2025 |
| Quality Transport Training Ltd | Education | 2007 |
| Quantum Heath Limited | Financial services | 2024 |
| Quatrefoil Capital Limited | Financial services | 2025 |
| Quatrefoil Investments Limited | Financial services | 2017 |
| Quatrefoil Property Limited | Real estate | 2025 |
| Qube Marketing Solutions Ltd | Professional & scientific | 2004 |
| R & R W Bartlett Limited | Manufacturing | 2010 |
| R B M Contracting Limited | Other services | 2018 |
| R C Austwick Ltd | Administrative & support | 2015 |
| R Craythorne Financial Ltd | Financial services | 2026 |
| R Dodwell Case Manager and OT Ltd | Health & social care | 2019 |
| R H Haulage Limited | Transport & logistics | 2004 |
| R J Ellory Publications Limited | Information & communication | 2004 |
| R J G Plumbing & Heating Ltd | Construction | 2006 |
| R S Chetland Limited | Real estate | 1960 |
| R S Padda Enterprise Limited | Real estate | 2023 |
| R S Padda Limited | Health & social care | 2023 |
| R S Thompson Limited | Transport & logistics | 2012 |
| R. Moulton Services Ltd | Construction | 2006 |
| R.Bridgeman and Sons Limited | Construction | 1954 |
| R.E. Spencer Limited | Water & waste | 2009 |
| R.K.Solutions Limited | Professional & scientific | 2010 |
| Radgol Martial Arts Limited | Arts & recreation | 2024 |
| Raffleade Ltd | Administrative & support | 2020 |
| Rage (Tamworth) Limited | Other services | 2005 |
| Raiden Cyber Solutions Limited | Information & communication | 2025 |
| Rail, Audits, Accident & Incident Investigation Logistics Limited | Professional & scientific | 2015 |
| Rainbow Financial Management Limited | Professional & scientific | 2012 |
| Rainbow Restoration Limited | Extraterritorial | 2023 |
| Rainbows (Shenstone ) Limited | Health & social care | 2010 |
| Raise Education Services Limited | Education | 2024 |
| Raise Services Ltd | Professional & scientific | 2024 |
| Rallszumix Ltd | Administrative & support | 2021 |
| RAM Provisions Limited | Other services | 2022 |
| Ramora Limited | Administrative & support | 1998 |
| Ramsden Logistics Limited | Transport & logistics | 2009 |
| Rand Quality Management Limited | Professional & scientific | 2025 |
| Randalls (Profiles) Limited | Manufacturing | 2002 |
| Randalls Profiles Holdings Limited | Financial services | 2020 |
| Rangemore Capital Limited | Administrative & support | 2025 |
| Rangemore Strategic Holdings Limited | Financial services | 2026 |
| Ranmak Holdings Ltd | Real estate | 2023 |
| Rapid Environmental (UK) Limited | Construction | 2019 |
| Rapid Environmental Commercial Ltd | Construction | 2026 |
| Rapid Group Ltd | Construction | 2025 |
| Rapport Speech & Language Therapy Ltd | Health & social care | 2018 |
| Rareroad Ltd | Transport & logistics | 2019 |
| Ratlabyane LLP | | 2024 |
| Ravekale Limited | Construction | 1982 |