| Qcra Limited | Households | 1997 |
| Qorebox Solutions Limited | Information & communication | 2025 |
| QSI Ltd | Construction | 2020 |
| Quaddus Creative Ltd | Professional & scientific | 2024 |
| Qualityexcellence Ltd | Professional & scientific | 2024 |
| Quantum Contractors Ltd | Construction | 2023 |
| Quantum Surveying & Commercial Management Limited | Extraterritorial | 2011 |
| Quay Futures Limited | Professional & scientific | 2009 |
| Quip (UK) Ltd | Extraterritorial | 2011 |
| QUO Capital Ltd | Financial services | 2022 |
| Qwillumi Ltd | Information & communication | 2021 |
| R & H Barton Limited | Construction | 2018 |
| R Allen Psychology Services Ltd | Health & social care | 2025 |
| R F T Decor Limited | Construction | 2007 |
| R Lawson Accounting Services Limited | Professional & scientific | 2022 |
| R Smith Heating Ltd | Construction | 2018 |
| R.D. George Limited | Construction | 2005 |
| R.J. Electrical (UK) Ltd | Construction | 1997 |
| Raaa Properties Limited | Real estate | 2017 |
| Radal Properties Ltd | Real estate | 2024 |
| Radlett Property Limited | Construction | 2022 |
| Rahmat Limited | Health & social care | 2021 |
| Raiders of the Lost Cars Ltd | Information & communication | 2024 |
| Rajan Manku Limited | Real estate | 2022 |
| Raleks Realty Limited | Hospitality | 2024 |
| RAM DRY Cleaners Limited | Other services | 2016 |
| Rama Knight Photographer Ltd | Professional & scientific | 2014 |
| Rapica Prime Ltd | Information & communication | 2025 |
| Rapid Payroll Ltd | Administrative & support | 2020 |
| Rarecare Limited | Real estate | 1988 |
| Ravi RAY Healthcare Ltd | Health & social care | 2014 |
| RAY Properties Limited | Extraterritorial | 2019 |
| Rayner Digital Ltd | Information & communication | 2023 |
| RBL Renovations Limited | Construction | 2025 |
| RC Haulage Services Limited | Transport & logistics | 2014 |
| RC Maintenance Kent Limited | Administrative & support | 2023 |
| Rcae Limited | Professional & scientific | 2013 |
| Rccg Destiny Centre | Other services | 2015 |
| RDK Consult Limited | Real estate | 2022 |
| Ready Players Go Ltd | Arts & recreation | 2021 |
| Real Escalator Services Ltd | Manufacturing | 2019 |
| Real Estate Holdings Ltd | Real estate | 2014 |
| Rebel Yeah! Ltd | Information & communication | 2023 |
| Recconnect HQ Ltd | Administrative & support | 2023 |
| Recneps Ltd | Construction | 2023 |
| Red Bows Property Ltd | Real estate | 2026 |
| Red Dragon Tech Consulting Ltd | Professional & scientific | 2022 |
| Red Rose Interiors Limited | Construction | 2008 |
| Redband Foundation Ltd | Other services | 2019 |
| Redband Music Limited | Arts & recreation | 2017 |
| Redhead Plumbing & Heating Ltd | Construction | 2012 |
| Reelen Limited | Real estate | 2021 |
| Reflections Radio CIC | Information & communication | 2021 |
| Refuel Bexley Limited | Hospitality | 2026 |
| Regal Consultancy RB Ltd | Professional & scientific | 2020 |
| Regency Developments South East Ltd | Construction | 2025 |
| Regiment Services Ltd | Administrative & support | 2022 |
| Reilly's ASC Ltd | Wholesale & retail | 2023 |
| Rembis Kitchen Limited | Hospitality | 2024 |
| Renova Home Developments Ltd | Construction | 2025 |
| Renova Home Investments Ltd | Real estate | 2025 |
| Renova Home Management Ltd | Real estate | 2025 |
| Repossession Stoppers Ltd | Real estate | 2019 |
| Repurpose Developments Ltd | Construction | 2025 |
| Resin Cornwall Ltd | Professional & scientific | 2025 |
| Retail Commerce Ltd | Wholesale & retail | 2019 |
| Retrack Personnel Holdings Limited | Administrative & support | 2023 |
| Retrack Personnel Ltd | Administrative & support | 2018 |
| Revenge Clothing Limited | Wholesale & retail | 2014 |
| REX Cowell Law Limited | Professional & scientific | 2014 |
| Reycom Building Services Limited | Construction | 2010 |
| RGM Builders (Kent) Limited | Construction | 2018 |
| Rhapsody Retreats Limited | Administrative & support | 2025 |
| RHB Boiler Services Ltd | Construction | 2024 |
| Rheamit Limited | Health & social care | 2013 |
| Rhythm Plumbing and Heating Limited | Construction | 2010 |
| RIB Rack Limited | Hospitality | 2025 |
| Richard Payne Photographer Ltd | Professional & scientific | 2015 |
| Richcarol Services Ltd | Households | 2022 |
| Richmond Upon Thames Property Limited | Construction | 2013 |
| Richwells Electrical Services Ltd | Construction | 2014 |
| RICOCHETB2B Ltd | Professional & scientific | 2021 |
| Riddle Hotels Limited | Hospitality | 2012 |
| Riddle's Accommodation Bureau Limited | Hospitality | 2012 |
| Rise Digital Media Limited | Transport & logistics | 2010 |
| Rive Gauche Wines (UK) Limited | Wholesale & retail | 2011 |
| River Walk (Ocean Park) Management Co. Limited | Households | 1993 |
| Riverdale Construction Limited | Construction | 2015 |
| Rivon London Ltd | Wholesale & retail | 2026 |
| Rjp-Decorators Limited | Construction | 2008 |
| RKP LDN Ltd | Manufacturing | 2023 |
| RL Projects Ltd | Administrative & support | 2010 |
| Rmkr Investments Limited | Real estate | 2022 |
| Robert Branscombe Consulting Limited | Professional & scientific | 2022 |
| Robert Miles Limited | Wholesale & retail | 2003 |
| Robert Miles Properties Limited | Real estate | 2005 |
| Robinson Property (Kent) Limited | Real estate | 2018 |
| Robinson White Investments Ltd | Real estate | 2022 |
| ROC Devco Limited | Construction | 2024 |
| ROC Newco 1 Limited | Construction | 2024 |