| PVJ Construction Ltd | Construction | 2026 |
| PWC Specialist Roofing Limited | Construction | 2024 |
| PWS Surveyors Limited | Professional & scientific | 2011 |
| Pyramid Contracts Limited | Construction | 2014 |
| Q Assure Build Limited | Financial services | 2010 |
| Q Building Control Ltd | Extraterritorial | 2010 |
| Q-Winn Cleaning Services Limited | Administrative & support | 2026 |
| Q-Winn Security Services Limited | Administrative & support | 2018 |
| QCH (Holdings) Limited | Financial services | 2018 |
| QI Star Property Investment Ltd | Real estate | 2020 |
| QMH (Croydon) Limited | Real estate | 2006 |
| Qoup Limited | Real estate | 2020 |
| Quadv Ltd | Information & communication | 2007 |
| Quality Care (EM) Limited | Health & social care | 2003 |
| Qualplus Ltd | Education | 2018 |
| Quantainer Ltd | Transport & logistics | 2026 |
| Quantex ARC Limited | Administrative & support | 2009 |
| Quantex Patents Limited | Administrative & support | 2003 |
| Quantient Limited | Information & communication | 2025 |
| Quantile Consulting Ltd | Extraterritorial | 2014 |
| Quantro Industries Ltd | Administrative & support | 2023 |
| Quantum Investec Limited | Education | 2024 |
| Quantum Recall Ltd | Information & communication | 2022 |
| Quareg Solutions Ltd | Professional & scientific | 2019 |
| Quest Material Technology Limited | Professional & scientific | 2006 |
| Quick Match Property Limited | Professional & scientific | 2025 |
| Quicktime Autocentres Limited | Wholesale & retail | 2025 |
| Quidio Ltd | Information & communication | 2026 |
| Quiet Form Ltd | Professional & scientific | 2026 |
| Quiksim Ltd | Wholesale & retail | 2026 |
| Quinell Limited | Real estate | 2015 |
| Quinton Electrical Ltd | Construction | 2015 |
| Quiseo Designs Ltd | Professional & scientific | 2022 |
| Quorbit Ltd | Information & communication | 2016 |
| R & L Roofing Specialist Ltd | Construction | 2024 |
| R & S Electrical Contractors Limited | Construction | 2004 |
| R B Mortgages Limited | Financial services | 2017 |
| R G Instrument Services Ltd | Administrative & support | 2003 |
| R K J Developments Limited | Real estate | 2014 |
| R&C Urban Assets Ltd | Real estate | 2025 |
| R&M Windows and Conservatories Ltd | Construction | 2009 |
| R.G.A Gardens Limited | Administrative & support | 2021 |
| R23 Accounting LLP | | 2025 |
| R2RUK Limited | Real estate | 2025 |
| R3 Builds Ltd | Construction | 2022 |
| Rabbits Relationships and SEX Education Ltd | Education | 2022 |
| Rabi Consultants Limited | Professional & scientific | 2018 |
| Rachel Holmes Art Ltd | Arts & recreation | 2024 |
| Rachwela Limited | Health & social care | 2012 |
| Racket Sports for ALL Limited | Arts & recreation | 2010 |
| Racoty Alex Limited | Information & communication | 2013 |
| Radford & Sergeant Limited | Professional & scientific | 2009 |
| Radford & Sergeant Software Limited | Information & communication | 2015 |
| Radiatorsonline.Com Ltd | Wholesale & retail | 2017 |
| Radoi Elena Ltd | Administrative & support | 2020 |
| Rafferty Facilities Limited | Professional & scientific | 2009 |
| Raga Caterers Ltd | Hospitality | 2026 |
| Rage Point Sports Ltd | Wholesale & retail | 2026 |
| Ragnarock Limited | Administrative & support | 2026 |
| RAI Homes Limited | Real estate | 2020 |
| Rainbow Wokingham Ltd | Professional & scientific | 2018 |
| Rainton Sons Property Services Ltd | Construction | 2025 |
| RAJ Care Ltd | Health & social care | 2016 |
| Rajveer Ltd | Transport & logistics | 2018 |
| Rakico Limited | Information & communication | 2022 |
| Ranga Ltd | Information & communication | 2022 |
| Rapid Raccon Logistics Limited | Transport & logistics | 2025 |
| Rare Inc. Limited | Wholesale & retail | 2007 |
| Rashi Properties Ltd | Real estate | 2020 |
| Rashmi Bhat Ltd | Professional & scientific | 2023 |
| Ratj Property Investment Ltd | Real estate | 2024 |
| Ratworks 2 Limited | Manufacturing | 2025 |
| Rav'N Limited | Real estate | 2019 |
| Ravenmark Ltd | Professional & scientific | 2025 |
| Ravi Gadiraju Pharma Limited | Health & social care | 2010 |
| RAW Electrics Limited | Construction | 2003 |
| Rawnet Limited | Information & communication | 1998 |
| Raxis Info Solutions Limited | Information & communication | 2011 |
| Rayan BI Ltd | Transport & logistics | 2022 |
| Raydene Management Company Limited | Households | 2005 |
| Raykel Fabrications Limited | Manufacturing | 2003 |
| Rayla Roofing Limited | Construction | 2026 |
| RB Point Ltd | Transport & logistics | 2025 |
| RBE Electrical Limited | Construction | 2017 |
| RC Designs Limited | Professional & scientific | 1989 |
| RC Worxs Ltd | Wholesale & retail | 2021 |
| RCB Products Limited | Wholesale & retail | 2026 |
| RCR Systems Limited | Construction | 2014 |
| Re-Counting Music Services Ltd | Information & communication | 2015 |
| Re-Fresh Coaching Ltd | Education | 2018 |
| Re-Ventz Ltd | Administrative & support | 2025 |
| Reading & Wokingham Coaches Ltd | Transport & logistics | 2021 |
| Reading Fencing Ltd | Administrative & support | 2020 |
| Real Cold Ltd | Wholesale & retail | 2025 |
| Real Gold Limited | Arts & recreation | 2013 |
| Rebecca Aesthetics Ltd | Other services | 2023 |
| Rebel Works Limited | Manufacturing | 2016 |
| Rebx Limited | Wholesale & retail | 2019 |
| Recce Digital Ltd | Information & communication | 2024 |
| Recertified IT Ltd | Information & communication | 2017 |