| Papdata Limited | Information & communication | 2017 |
| Penhale Place Management Company Limited | Households | 2013 |
| Peripheral Rentals Limited | Professional & scientific | 1981 |
| Phantasm Facilities Ltd | Other services | 2023 |
| Phantasm FX Ltd | Information & communication | 2011 |
| Phantasm Special Props Ltd | Other services | 2022 |
| Phantasm Virtual Visualisation Limited | Information & communication | 2020 |
| Polkadot Cat Limited | Professional & scientific | 2008 |
| Potentia Consultants Ltd | Information & communication | 2010 |
| Powerbell Services Limited | Wholesale & retail | 2022 |
| PPP BTL Ltd | Real estate | 2021 |
| Praise Music Limited | Information & communication | 2017 |
| Pretorius and Pretorius Limited | Health & social care | 2010 |
| Prime Services (Berkshire) Ltd | Construction | 2023 |
| Priory 1CC LLP | | 2017 |
| Priory CC10 Limited | Health & social care | 2017 |
| Priory CC22 Limited | Health & social care | 2018 |
| Priory CC24 Limited | Health & social care | 2018 |
| Priory CC25 Limited | Health & social care | 2018 |
| Priory CC26 Limited | Health & social care | 2018 |
| Priory CC27 Limited | Health & social care | 2018 |
| Priory CC31 Limited | Health & social care | 2019 |
| Priory CC33 Limited | Health & social care | 2019 |
| Priory CC36 Limited | Health & social care | 2019 |
| Priory CC37 Limited | Health & social care | 2019 |
| Priory CC38 Limited | Health & social care | 2019 |
| Priory CC39 Limited | Health & social care | 2019 |
| Priory CC4 Limited | Health & social care | 2017 |
| Priory CC40 Limited | Health & social care | 2019 |
| Priory CC5 Limited | Health & social care | 2017 |
| Priory CC7 Limited | Health & social care | 2017 |
| Psiquantum Ltd | Information & communication | 2016 |
| R & I Futures Limited | Other services | 2022 |
| R D Simha Ltd | Real estate | 2021 |
| Rand Group Holdings Limited | Real estate | 2018 |
| Randhawa Consulting Limited | Information & communication | 2011 |
| Range Facilities (Burnham) Limited | Manufacturing | 1993 |
| Remodox Limited | Administrative & support | 2019 |
| Rennievations Limited | Construction | 2010 |
| Resilinc UK Ltd | Information & communication | 2016 |
| Rich Solutions Ltd | Information & communication | 2022 |
| Richmere Construction Ltd | Construction | 2018 |
| RKL Smith Investments Limited | Other services | 2018 |
| RSJ Electrical Services Ltd | Construction | 2015 |
| Rubislaw Care LLP | | 2014 |
| S. C. Freight Limited | Transport & logistics | 2001 |
| Salient Insight Solutions Ltd | Manufacturing | 2017 |
| Sandringham Court (Burnham) RTM Company Limited | Households | 2014 |
| Sanroh Limited | Information & communication | 2023 |
| Sant Inc Ltd | Wholesale & retail | 2024 |
| Scalevector Ltd | Information & communication | 2025 |
| Scrap Today Limited | Wholesale & retail | 2018 |
| Seal Navitas Limited | Information & communication | 2015 |
| Secure Homes Locksmiths Ltd | Administrative & support | 2014 |
| Senseless Acts of Beauty Limited | Professional & scientific | 2014 |
| Seventeen 17 Limited | Arts & recreation | 2020 |
| Seventeen 17 Touring LLP | | 2024 |
| Shareagile Ltd | Information & communication | 2016 |
| Shedlia Ltd | Professional & scientific | 2014 |
| Skedulo UK Ltd | Information & communication | 2017 |
| Slide Clinic Limited | Information & communication | 2009 |
| Smile Care Hold (UK) Ltd | Financial services | 2018 |
| Smile Care KSS Ltd | Health & social care | 2022 |
| Smile Care Pocklington Ltd | Health & social care | 2023 |
| Smile Care Services Limited | Administrative & support | 2022 |
| Smile Care South Limited | Health & social care | 2019 |
| Smile Care Sturminster Ltd | Health & social care | 2021 |
| Smile Care United Ltd | Health & social care | 2021 |
| Smile Care York Ltd | Health & social care | 2023 |
| Smile PPP Eastbourne Ltd | Administrative & support | 2020 |
| Smith and West Investments Limited | Construction | 2017 |
| Soft Build Ltd | Wholesale & retail | 2015 |
| Southern Comfort Homecare Ltd | Health & social care | 2023 |
| Spa Staff.Com Limited | Administrative & support | 2010 |
| Spirit of Giving | Health & social care | 2020 |
| ST James Holdings Limited | Administrative & support | 2007 |
| Starburst Aviation (UK) Limited | Transport & logistics | 2002 |
| Station Hill Management Company Limited | Real estate | 1990 |
| Strawberry Place Newcastle Limited | Professional & scientific | 1997 |
| Sun Shading Project Installations Limited | Construction | 2021 |
| Supermart PVT Ltd | Wholesale & retail | 2022 |
| Swingbusy Limited | Real estate | 1986 |
| T & S Transport Limited | Transport & logistics | 2020 |
| T2RL Travel Technology Research Ltd | Information & communication | 2005 |
| Tangent Link Ltd | Professional & scientific | 2003 |
| Tattoo Shop by DAN Gold Limited | Other services | 2023 |
| Taylor Woodwork Ltd | Construction | 2023 |
| TDS Electronics Ltd | Construction | 2013 |
| Teck Xpertz Limited | Wholesale & retail | 2022 |
| TEN M II Ltd | Health & social care | 2018 |
| Tenm III Limited | Health & social care | 2018 |
| Tenm IV Limited | Health & social care | 2018 |
| Teststick Limited | Professional & scientific | 2003 |
| TG Superchips Ltd | Hospitality | 2025 |
| THE Borough Maidenhead Limited | Hospitality | 2023 |
| THE Fleet Care Home Limited | Health & social care | 2019 |
| THE LSF Secretariat Ltd | Financial services | 2022 |
| THE Pakawa Luggage Company Limited | Manufacturing | 2021 |
| THE Right Hand Side Limited | Professional & scientific | 2012 |
| Thingy Unlimited | Professional & scientific | 2007 |