| R E Associates Stansted Limited | Education | 2006 |
| R Farman Brickwork and Groundwork Contractor Limited | Construction | 2021 |
| R J K Multi-Room Limited | Administrative & support | 2011 |
| R Khinda Holdings Ltd | Real estate | 2024 |
| R Palmer Engineering Limited | Professional & scientific | 2012 |
| R T Brickworks Limited | Construction | 2026 |
| R Vale Roofing Limited | Construction | 2013 |
| R&D Plumbing Ltd | Construction | 2021 |
| R&J Management Ltd | Real estate | 2016 |
| R&K Chibah Ltd | Real estate | 2018 |
| R&K Pham Limited | Wholesale & retail | 2016 |
| R&R Investment JV Ltd | Real estate | 2023 |
| R&V Food & Wine Limited | Wholesale & retail | 2014 |
| R&V Properties Limited | Real estate | 2024 |
| R. Fear Limited | Real estate | 2014 |
| R.O'D Transport Ltd | Transport & logistics | 2025 |
| R.S.Light Ltd | Other services | 2019 |
| R3R (Essex) Limited | Other services | 2018 |
| RA Security Solutions Ltd | Administrative & support | 2025 |
| Raam Employee Services Limited | Administrative & support | 2023 |
| Raam Fire & Compliance Ltd | Construction | 2006 |
| Raaw Building Services Ltd | Construction | 2016 |
| Rabcad Cybersecurity Solutions Ltd | Information & communication | 2023 |
| Rabi Khazim Limited | Health & social care | 2001 |
| Racking Spares Ltd | Wholesale & retail | 2018 |
| RAD Worldwide Ltd | Professional & scientific | 2025 |
| Radfan Ltd | Administrative & support | 2019 |
| Radheshyam Property Limited | Real estate | 2024 |
| Radiance Realty Ltd | Real estate | 2023 |
| Radiant Gardens Ltd | Administrative & support | 2026 |
| Radiomarathon (for Children With Special Needs) Limited | Health & social care | 1997 |
| Radisol Teleradiology Limited | Health & social care | 2023 |
| Radisson Catering Ltd | Hospitality | 2018 |
| Radmax Scaffolding Ltd | Construction | 2015 |
| Raduk Teleradiology Limited | Health & social care | 2024 |
| RAE Cheval Equestrian Ltd | Wholesale & retail | 2025 |
| Raeds Investments Limited | Financial services | 2018 |
| Rafahia Care Services Ltd | Administrative & support | 2018 |
| Raha Destinations Ltd | Administrative & support | 2024 |
| Rahaman & Sons Ltd | Real estate | 2026 |
| Rahmantec Limited | Real estate | 2018 |
| Railway Kebab Limited | Hospitality | 2019 |
| Raim Plumbing Services Ltd | Construction | 2025 |
| Rainbeau Events Ltd | Wholesale & retail | 2024 |
| Rainbow Accountants Ltd. | Other services | 2017 |
| Rainbow Challenger Limited | Extraterritorial | 2022 |
| Rainbow Fabrics Limited | Wholesale & retail | 2022 |
| Rainbow Industrial Estate Management Company Limited | Real estate | 2025 |
| Rainbow London Ltd | Wholesale & retail | 2008 |
| Raindrops Trade Ltd | Wholesale & retail | 2022 |
| Rainer Retail Limited | Wholesale & retail | 2025 |
| Rais Consulting Ltd | Administrative & support | 2013 |
| Rais Mice Ltd | Information & communication | 2014 |
| Rajkumarr Limited | Hospitality | 2026 |
| Rally Logistics Ltd | Other services | 2019 |
| Raluma Limited | Information & communication | 2015 |
| Rama Ceiling Systems Limited | Construction | 2007 |
| Raman Educational Psychology Ltd | Education | 2026 |
| Rambo (INT) Ltd | Real estate | 2026 |
| Ramona Affluent Services Limited | Transport & logistics | 2020 |
| Ramos Consulting Ltd | Professional & scientific | 2020 |
| Ramstar Company Ltd | Real estate | 2024 |
| Ramthor Pubs Ltd | Hospitality | 2026 |
| Ramz Motors Limited | Wholesale & retail | 2017 |
| Rana Food & Grocery Deliveries Ltd | Hospitality | 2022 |
| Rand Toma Ltd | Health & social care | 2025 |
| Rane Flooring Ltd | Construction | 2023 |
| Rani 24 Limited | Financial services | 2025 |
| Rani Health Ltd | Health & social care | 2025 |
| Rani Spices Limited | Manufacturing | 2020 |
| Rank Traders Ltd | Wholesale & retail | 2025 |
| RAO Planning Solutions Limited | Professional & scientific | 2025 |
| RAP Segment Limited | Manufacturing | 2011 |
| Rapid Buys UK Limited | Wholesale & retail | 2025 |
| Rapid General Services Ltd | Construction | 2014 |
| Rapid Haul Ltd | Transport & logistics | 2024 |
| Rapid Transit System Ltd | Financial services | 2022 |
| Rapide Cars Ltd | Wholesale & retail | 2017 |
| Rapidwire Technologies Limited | Information & communication | 2024 |
| Rarity Estates Ltd | Real estate | 2021 |
| Rascal Confectionery Limited | Manufacturing | 1967 |
| Rashpal Gura Limited | Health & social care | 2003 |
| Rasmi Care Services Ltd | Health & social care | 2020 |
| Raspberry Productions Ltd | Administrative & support | 2002 |
| Rasto Group Construct Ltd | Construction | 2021 |
| Ratio Investments LP | | 2015 |
| Ravensden Consultants Limited | Professional & scientific | 2014 |
| RAY Security Systems Ltd | Administrative & support | 2025 |
| Rayana Ltd | Real estate | 2026 |
| Raydharam Limited | Professional & scientific | 2026 |
| Raymond Ventures Limited | Construction | 2016 |
| Raynors Facilities Ltd | Other services | 2024 |
| Rayyan Property Ltd | Real estate | 2024 |
| RAZ and NAZ Properties Limited | Construction | 2019 |
| Razerq Limited | Information & communication | 2017 |
| Razix Technology Ltd | Information & communication | 2025 |
| Razor Murat Ltd | Other services | 2026 |
| Razorblade Suitcase Ltd | Other services | 2018 |
| Raztechno Limited | Information & communication | 2015 |
| RB Brovo Ltd | Construction | 2022 |