| Prestige Auto Service Centre Limited | Wholesale & retail | 2015 |
| Prestige Landscapes, Fencing Ltd | Administrative & support | 2025 |
| Pretty Nails KD Ltd | Other services | 2025 |
| Pride Lounge Ltd | Hospitality | 2025 |
| Priestlands Management Services Limited | Professional & scientific | 2024 |
| Primary Active Futures Ltd | Education | 2025 |
| Primary Healthcare Solutions Limited | Professional & scientific | 2006 |
| Primary Squared Services Limited | Professional & scientific | 2012 |
| Prime + Partners Limited | Real estate | 2020 |
| Prime Alternative Property LLP | | 2019 |
| Prime Consultancy Solutions Ltd | Information & communication | 2016 |
| Prime Performance & Wellness Limited | Arts & recreation | 2019 |
| Prime Tennis Academy Group Ltd | Arts & recreation | 2024 |
| Primo Shipping Ltd | Transport & logistics | 2023 |
| Primus Care PLC | Health & social care | 2014 |
| Prism Electric Limited | Construction | 2020 |
| Prism RG Ltd | Information & communication | 2026 |
| Prism Travel & Events Limited | Administrative & support | 2020 |
| Private Health Care Visiting Services Limited | Administrative & support | 2012 |
| Pro Academy Coaching Ltd | Administrative & support | 2009 |
| Pro Accommodation Ltd | Real estate | 2017 |
| Pro Group Property Ltd | Real estate | 2024 |
| Pro-Products Limited | Wholesale & retail | 2008 |
| Pro-Tec Roofing & Building Services Limited | Construction | 2010 |
| Pro-Tile Roofing Limited | Construction | 2018 |
| Proaxis Events Limited | Professional & scientific | 2019 |
| Procraft Holdings Limited | Professional & scientific | 2026 |
| Proctor & Maslin Limited | Construction | 2015 |
| Progec Limited | Professional & scientific | 2008 |
| Projects & Programmes Solutions Limited | Administrative & support | 2012 |
| Projects & Property Development Ltd | Construction | 2021 |
| Proof-Uk Ltd | Information & communication | 2014 |
| Prop Management Services Limited | Real estate | 2025 |
| Property Clear UP Limited | Water & waste | 2019 |
| Property Harbour Limited | Real estate | 2018 |
| Property Maintenance Services (Maida Vale) Ltd | Professional & scientific | 2019 |
| Property Matters (Investments) Limited | Real estate | 2003 |
| Prophet Technologies Ltd | Administrative & support | 2023 |
| Prosyst Limited | Administrative & support | 2025 |
| Provision Vehicle Cameras Ltd | Manufacturing | 2016 |
| PSE Lighting Ltd | Manufacturing | 2005 |
| PSG Legal Services Limited | Professional & scientific | 2011 |
| PSM Flooring Limited | Construction | 2018 |
| PSR Legal Ltd | Professional & scientific | 2020 |
| Psychology at Work Ltd | Health & social care | 2015 |
| PTM Combined Services Limited | Construction | 2024 |
| Puffnoo Ltd | Real estate | 2016 |
| Pulse Property Maintenance Limited | Construction | 2007 |
| Pupps Music Ltd | Arts & recreation | 2018 |
| Pups and Cups Limited | Hospitality | 2025 |
| Pure Global Returns Limited | Financial services | 2019 |
| Pure Waffle Limited | Hospitality | 2005 |
| Purevance Limited | Wholesale & retail | 2025 |
| Purple Fizz Events Limited | Administrative & support | 2017 |
| Purple Settee Development Ltd | Real estate | 2015 |
| Pursuit IT Ltd | Information & communication | 2019 |
| Pursuit Property Ltd | Real estate | 2020 |
| PW Creative Group Ltd | Professional & scientific | 2025 |
| Qamfis Limited | Wholesale & retail | 2023 |
| QGM Consult Ltd | Professional & scientific | 2024 |
| Qmac Homes Ltd | Administrative & support | 2020 |
| Qmbeautycosmeticsuk Limited | Wholesale & retail | 2025 |
| Quad Orbis Homes Ltd | Real estate | 2026 |
| Quader Limited | Information & communication | 2026 |
| Quality Flex IT Services Limited | Information & communication | 2012 |
| Quality Kebab House Limited | Real estate | 2025 |
| Quality Orpington Limited | Hospitality | 2025 |
| Quantum Associates (UK) Ltd | Professional & scientific | 1997 |
| Quantum Power Services Limited | Administrative & support | 2011 |
| Quantum Privacy and Risk Compliance Limited | Other services | 2019 |
| Quarrington Services Limited | Construction | 2024 |
| Qubit IT Limited | Information & communication | 2016 |
| Queen B Hair Salon Limited | Other services | 2022 |
| Quiet Labs Limited | Wholesale & retail | 2024 |
| Quikcuts Limited | Arts & recreation | 2014 |
| Quinn & Quill London Ltd | Wholesale & retail | 2021 |
| Quintessential Pubs Limited | Hospitality | 2026 |
| Quote Builders Ltd | Construction | 2019 |
| R & B Lift Services Limited | Professional & scientific | 2024 |
| R & D Matterson Limited | Professional & scientific | 2020 |
| R & R Automotive Ltd | Wholesale & retail | 2007 |
| R & R Glazing Ltd | Construction | 2018 |
| R & R Properties (Essex) Limited | Other services | 2013 |
| R Creed Building Contractors Limited | Construction | 2005 |
| R H Scaffolding Solutions Limited | Construction | 2026 |
| R J London Limited | Administrative & support | 2018 |
| R LEE Photography Ltd | Administrative & support | 2022 |
| R Nunn Contracting Services Ltd | Professional & scientific | 2026 |
| R Nunn Electrical Ltd | Construction | 2016 |
| R P Willsher Limited | Administrative & support | 2018 |
| R Peirce Consulting Limited | Information & communication | 2014 |
| R Sadlier Ltd | Financial services | 2026 |
| R Vincent Limited | Health & social care | 2013 |
| R&D Digital Ltd | Information & communication | 2017 |
| R&H Connect Heating & Plumbing Ltd | Construction | 2011 |
| R&R Jointing Limited | Construction | 2025 |
| R&R Resin Services Ltd | Construction | 2024 |
| R&Z Decorators Ltd | Construction | 2026 |
| R-Golden Wing Executive Ltd | Transport & logistics | 2020 |
| R.E.N Scaffolding Ltd | Construction | 2025 |