| Protea Homes Ltd | Real estate | 2019 |
| Proud Properties Limited | Real estate | 1994 |
| Provident Services Ltd | Manufacturing | 2016 |
| Provision Events Group Limited | Financial services | 2019 |
| Provision Events Ltd | Arts & recreation | 2010 |
| Prudentcode Ltd | Information & communication | 2020 |
| Prusap CIC | Education | 2026 |
| Pryer Construction (UK) Limited | Construction | 2003 |
| PSA Celestitea Ltd | Wholesale & retail | 2025 |
| PSD 2022 Limited | Professional & scientific | 2022 |
| Psimei Pharmaceuticals Ltd | Administrative & support | 2001 |
| Pskp Ltd | Professional & scientific | 2025 |
| Ptolemy Partners Limited | Administrative & support | 2004 |
| Pukka Press Ltd | Information & communication | 2005 |
| Pulsar Acoustics Ltd | Professional & scientific | 2021 |
| Pulsar Healthcare Limited | Health & social care | 2025 |
| Pulse Mapping Ltd | Construction | 2011 |
| Pulsehd Limited | Information & communication | 2025 |
| Pulseteq Ltd | Manufacturing | 2012 |
| Punika Ltd | Wholesale & retail | 2025 |
| Punyatech Limited | Professional & scientific | 2004 |
| Puranik Partners Limited | Health & social care | 2023 |
| Purcell Stuart Self Assessment Specialists Limited | Professional & scientific | 2002 |
| Pure Croft Ltd | Wholesale & retail | 2024 |
| Pure Home Services Ltd | Construction | 2025 |
| Pure Prana Ltd | Health & social care | 2025 |
| Pure Publishing Limited | Information & communication | 1999 |
| Pure Skin LAB Ltd | Other services | 2024 |
| Pure Skip Bags Ltd | Water & waste | 2025 |
| PUREH2O Company Ltd | Other services | 2015 |
| PUREH2O Ltd | Other services | 2004 |
| Purepromoter Ltd | Information & communication | 2001 |
| Purewaterpureair Ltd | Manufacturing | 2015 |
| Purple Green Properties Limited | Real estate | 2016 |
| Purple Travel Limited | Administrative & support | 2010 |
| Pursey Housing Services Limited | Real estate | 2020 |
| Putney Tree Specialists Limited | Agriculture & fishing | 2019 |
| Puttenham Press Ltd | Information & communication | 2021 |
| Putu Clothing Company Limited | Wholesale & retail | 1995 |
| Puzzle Digital Marketing Ltd | Professional & scientific | 2025 |
| PW Holdings Surrey Limited | Financial services | 2022 |
| Pyramid Realtors Ltd | Real estate | 2024 |
| Pzaz Ltd | Information & communication | 2018 |
| Q Service Station Ltd | Wholesale & retail | 2010 |
| Q-Wave Ltd | Information & communication | 2019 |
| Qbpropertyholdings Ltd | Real estate | 2024 |
| Qbpropertyholdingsob Ltd | Real estate | 2024 |
| Qidos Limited | Information & communication | 2003 |
| Qingjiang Consultancy Ltd | Information & communication | 2021 |
| Qinventory Ltd | Real estate | 2015 |
| QL2 Europe Ltd | Information & communication | 2005 |
| Qomity Limited | Professional & scientific | 2014 |
| Qomport Limited | Information & communication | 2016 |
| QRO Solutions Limited | Manufacturing | 2000 |
| Quad Plumbing Solutions Ltd | Construction | 2025 |
| Quadra Plan Limited | Other services | 2009 |
| Quadrant Buyers (Liverpool) Limited | Financial services | 2014 |
| Quadrum Carpentry & Construction Ltd | Extraterritorial | 2015 |
| Quaffs Thirsty Work Limited | Manufacturing | 2026 |
| Quality Line Transport Limited | Transport & logistics | 1933 |
| Quality Management & Training Ltd. | Professional & scientific | 1990 |
| Quality Management and Training (Publications) Ltd. | Information & communication | 1995 |
| Quality Management Holdings Limited | Professional & scientific | 2005 |
| Quantasys Solutions Ltd | Information & communication | 2025 |
| Quantopticon Ltd. | Information & communication | 2017 |
| Quantum Infinity Holdings Ltd | Information & communication | 2025 |
| Quarry Gate Ltd | Wholesale & retail | 2021 |
| Quarry Street Capital Ltd | Administrative & support | 2010 |
| Quarrymoor Limited | Professional & scientific | 2000 |
| Quartz Recruitment Limited | Administrative & support | 2022 |
| Qube Buildings Ltd | Construction | 2021 |
| Quebec Limited | Real estate | 2018 |
| Queenhythe Management Company Limited | Households | 2005 |
| Queensgate (Godalming) Freehold Limited | Households | 2008 |
| Quentin Trivor Ltd | Real estate | 2022 |
| Quest Active Ltd | Health & social care | 2021 |
| Quest Worldwide Holdings Limited | Professional & scientific | 2013 |
| Quick Execution Limited | Information & communication | 2019 |
| Quick Fantastic Ltd | Arts & recreation | 2021 |
| Quintard Ltd | Administrative & support | 2018 |
| Quintwood & Co. Ltd | Professional & scientific | 2023 |
| Quogan Ltd | Information & communication | 2010 |
| Qwaterside Residents Company Limited | Households | 2006 |
| R & G Procurement Services Limited | Professional & scientific | 2023 |
| R & J Exclusive Letting Ltd | Real estate | 2023 |
| R & W Cafexpress Limited | Hospitality | 2010 |
| R a Racing Ltd | Arts & recreation | 2025 |
| R B Cars Limited | Wholesale & retail | 2021 |
| R Hurst Electrical Limited | Construction | 2023 |
| R J Plumbing & Heating ( Surrey ) Ltd | Construction | 2014 |
| R J Simmons Agricultural Services Limited | Agriculture & fishing | 2011 |
| R J Wallis Catering Limited | Hospitality | 2018 |
| R Jackson Property & Co Ltd | Real estate | 2024 |
| R Kilbride Ltd | Professional & scientific | 2013 |
| R S Moss (Properties) Limited | Real estate | 1962 |
| R W Flight Training Services Limited | Other services | 2010 |
| R&R Builders Ltd | Construction | 2024 |
| R. Costain & Sons Limited | Extraterritorial | 1933 |
| R.D.Hosking(Guildford)Limited | Real estate | 1954 |
| R.T.C. Site Engineering Ltd | Construction | 2007 |