| Raffy's Hair Ltd | Other services | 2019 |
| RAH Plumbing & Heating Ltd | Construction | 2011 |
| Rahidina Holdings Ltd | Real estate | 2014 |
| RAI Family Holdings Limited | Financial services | 2026 |
| RAI Medical Limited | Health & social care | 2013 |
| Rainbow Agro Products Limited | Wholesale & retail | 2020 |
| Rainbow Gardening Ltd | Construction | 2012 |
| Raiya Properties Limited | Real estate | 2023 |
| RAM Sealant Ltd | Construction | 2017 |
| Ramc Limited | Information & communication | 2005 |
| Ramren Limited | Wholesale & retail | 2020 |
| Rams Kebab House Limited | Hospitality | 2010 |
| Ramsa Services Ltd | Transport & logistics | 2023 |
| Rana Elena Media Ltd | Professional & scientific | 2026 |
| Rana’S Enterprise Limited | Construction | 2025 |
| Random FIN Ltd | Information & communication | 2025 |
| Random Rock Limited | Professional & scientific | 2004 |
| Ranga Records Ltd | Professional & scientific | 2024 |
| Ranjan Consulting Limited | Professional & scientific | 2011 |
| Ranjan GP Ltd | Professional & scientific | 2016 |
| Ranmore Court (Wimbledon) Managements Limited | Real estate | 1972 |
| Ranmore Court (Worple Road) Freehold Limited | Households | 2018 |
| Rapley Rentals Ltd | Real estate | 2026 |
| Rare Find Collectibles Limited | Wholesale & retail | 2022 |
| Rasa Media Ltd | Extraterritorial | 2020 |
| Rascals Play and Learn Limited | Arts & recreation | 2018 |
| Rasmo Hawk Limited | Wholesale & retail | 2022 |
| Rather Good Butler Limited | Information & communication | 2025 |
| Rather Good Films Ltd | Information & communication | 2013 |
| Rather Good Rights Limited | Information & communication | 2024 |
| RAV Builders Limited | Construction | 2012 |
| RAV Property Investment Ltd | Real estate | 2026 |
| Ravagers Ltd | Information & communication | 2021 |
| Rave PR Limited | Other services | 2015 |
| RAW Dubs Ltd | Wholesale & retail | 2026 |
| RAW Estate Services Ltd | Real estate | 2023 |
| RAY Arch Construction Limited | Construction | 2012 |
| Raybourne (U.K) Limited | Professional & scientific | 1983 |
| Rayner Renovar Homes Ltd | Real estate | 2023 |
| RB Zhao Consulting Ltd | Professional & scientific | 2026 |
| RBC77648 Ltd | Transport & logistics | 2026 |
| RBP Security Limited | Administrative & support | 2012 |
| RC Clothing Ltd | Manufacturing | 2019 |
| Rcky Limited | Transport & logistics | 2020 |
| Rclg Limited | Real estate | 2013 |
| RCO Projects Architecture & Engineering Limited | Professional & scientific | 2020 |
| Rd.Lights Ltd | Information & communication | 2012 |
| RDG Consultants Limited | Professional & scientific | 2025 |
| Rdlg Properties Ltd | Real estate | 2025 |
| RDR Holdings Ltd | Transport & logistics | 2023 |
| Re-Style Decorators Limited | Construction | 2000 |
| Realistic Music Academy Limited | Education | 2012 |
| Realprest Construct Ltd | Construction | 2026 |
| Realspan Consulting Limited | Real estate | 2007 |
| Rebecca Amin Coaching Ltd | Professional & scientific | 2023 |
| Red Agate Limited | Construction | 2023 |
| Red Aura Ltd | Wholesale & retail | 2023 |
| Red Banana Club Limited | Education | 2013 |
| Red Card Music Limited | Extraterritorial | 2014 |
| Red Frog Freehold Limited | Households | 2025 |
| Red Kite Facility Services Limited | Administrative & support | 2024 |
| Red Leaf Research Limited | Professional & scientific | 2010 |
| Red Lemonade Ltd | Professional & scientific | 2024 |
| Red Moon Pubs Limited | Hospitality | 2025 |
| Reddington Property Ltd | Households | 2020 |
| Reddot Photos Ltd | Professional & scientific | 2025 |
| Redee Global Limited | Administrative & support | 2025 |
| Redmond Design and Build Limited | Construction | 2015 |
| Redpath Partners Limited | Administrative & support | 2015 |
| Redruth House(Sutton)Residents Company Limited | Households | 1966 |
| Redz Property Sales Ltd | Real estate | 2020 |
| Reef Quest Ltd | Wholesale & retail | 2016 |
| Rees Resourcing Limited | Administrative & support | 2011 |
| Reewop Ltd | Construction | 2025 |
| Refine Property Maintenance Ltd | Construction | 2020 |
| Refined Beauty Ltd | Wholesale & retail | 2024 |
| Reflektor Lady Limited | Information & communication | 2014 |
| Reflex Action Film Limited | Information & communication | 2014 |
| Regalden Ltd | Wholesale & retail | 2025 |
| Regent (Caterham) Ltd | Real estate | 2020 |
| Regent (Cross Lane) Ltd | Real estate | 2019 |
| Regent Court (Guildford) Limited | Real estate | 2003 |
| Regent Land (Poppy Lane) Ltd | Real estate | 2020 |
| Regent Land (Rotherhithe) Ltd | Real estate | 2018 |
| Regent Land (Sussex Road) Ltd | Real estate | 2018 |
| Regent Land and Developments Limited | Real estate | 2012 |
| Regent Land Group Limited | Real estate | 2020 |
| Regent Land Partnership Homes Ltd | Real estate | 2022 |
| Regent Land Pleasure Boat Ltd | Real estate | 2016 |
| Regent Land SE15 Ltd | Real estate | 2020 |
| Regents Property Holdings Ltd | Real estate | 2026 |
| Regintel Analytics Ltd | Information & communication | 2025 |
| Rego Group Ltd | Administrative & support | 2020 |
| Regovan K.P.S. Limited | Professional & scientific | 2005 |
| Regtech IT Ltd | Information & communication | 2017 |
| Regulas Consultancy Partners Ltd | Professional & scientific | 2025 |
| Regulink Limited | Professional & scientific | 2014 |
| Reheat ME Limited | Construction | 2014 |
| Reigate Plumbers Limited | Construction | 2016 |
| Reigate Plumbing Services Ltd | Construction | 2022 |