| Regency Marquee Hire Ltd | Administrative & support | 2021 |
| Regency Properties and Lettings Limited | Real estate | 2012 |
| Regency Property (London) Limited | Real estate | 2010 |
| Regency Worldwide Ltd | Transport & logistics | 2013 |
| Regenesys Energy Group Ltd | Professional & scientific | 2018 |
| Regent Sewing and Knitting Machines Limited | Wholesale & retail | 1986 |
| Regent Stone Ltd | Real estate | 2026 |
| Regent Traders Limited | Wholesale & retail | 2015 |
| Regent UK FM Ltd | Real estate | 2025 |
| Regentek Ltd | Wholesale & retail | 2018 |
| Regents Computer and Softwares Solutions Limited | Information & communication | 2025 |
| Regents Computer Limited | Information & communication | 2021 |
| Regents Estate Limited | Real estate | 2024 |
| Regents Gothia CUP Limited | Arts & recreation | 2009 |
| Regents IT and Computers Limited | Information & communication | 2023 |
| Regents Park Community Sports Community Interest Company | Administrative & support | 2008 |
| Regents Park MEN Limited | Arts & recreation | 2023 |
| Regents Park Properties Ltd | Real estate | 2020 |
| Regents Park Women Limited | Arts & recreation | 2023 |
| Reginalaw Limited | Professional & scientific | 2018 |
| Regnum DEI Limited | Financial services | 2026 |
| Rehabcure Physiotherapy Ltd | Other services | 2024 |
| Rehal Homes Ltd | Real estate | 2024 |
| Rehma Medical Services Ltd | Health & social care | 2024 |
| Rehmat Builders Ltd | Construction | 2025 |
| Rehoboth Healthcare Limited | Administrative & support | 2025 |
| Rehoboth Marketing Ltd | Professional & scientific | 2019 |
| Reifier Ltd | Professional & scientific | 2013 |
| Reign Incorp Ltd | Other services | 2024 |
| Reimagine Biztechnik Ltd | Information & communication | 2025 |
| Reine Noire Boutique Ltd | Wholesale & retail | 2016 |
| Reis Hair and Beauty Ltd | Other services | 2024 |
| Rejja Fashions Limited | Wholesale & retail | 2019 |
| Rejuvence Ltd | Health & social care | 2024 |
| Rekon Accounting Ltd | Professional & scientific | 2016 |
| Rekon Properties Limited | Real estate | 2021 |
| Relate Service Providers Ltd | Health & social care | 2020 |
| Relate Service Providers Staffing Ltd | Administrative & support | 2026 |
| Relatum Ltd | Information & communication | 2019 |
| Relenra Solution Limited | Information & communication | 2026 |
| Relevance LAB Ltd | Information & communication | 2023 |
| Reliability Properties Ltd | Real estate | 2021 |
| Reliable Medserv Limited | Health & social care | 2019 |
| Reliable Phvs UK Ltd | Transport & logistics | 2025 |
| Reliable Traders (UK) Ltd | Wholesale & retail | 2005 |
| Reliance 786 Ltd | Real estate | 2021 |
| Reliance Construction (London) Limited | Construction | 2018 |
| Reliance Haulge Limited | Transport & logistics | 2026 |
| Reliance Home Care Limited | Real estate | 2015 |
| Reliance Home Services(Uk) Ltd | Hospitality | 2024 |
| Reliance Mortgage Solutions Ltd | Financial services | 2025 |
| Reliance PLC | Extraterritorial | 2006 |
| Reliance Professional Services Ltd | Other services | 2019 |
| Reliance Property Investment Ltd | Real estate | 2025 |
| Reliance Property Services Ilford Ltd | Real estate | 2018 |
| Reliance Pulse Ltd | Wholesale & retail | 2025 |
| Reliance Tax Advisers Limited | Professional & scientific | 2017 |
| Reliance Traders Limited | Wholesale & retail | 2015 |
| Reliant Mining UK Ltd | Professional & scientific | 2023 |
| Reliant Traders Ltd | Wholesale & retail | 2025 |
| Relish Colchester Ltd | Hospitality | 2025 |
| Relson Properties Limited | Real estate | 1970 |
| Remake Materials Ltd | Wholesale & retail | 2023 |
| Remax Manpower Services Limited | Administrative & support | 2025 |
| Remiteazy Ltd | Wholesale & retail | 2024 |
| Remitrise Ltd | Financial services | 2016 |
| Remmd Fast Food Limited | Hospitality | 2019 |
| Remote Accounting Ltd | Professional & scientific | 2021 |
| Remote AI Consulting Ltd | Information & communication | 2025 |
| Remote Link Xperts Ltd | Professional & scientific | 2024 |
| Remotical Limited | Information & communication | 2019 |
| REMOVAL4LESS Ltd | Transport & logistics | 2023 |
| Removals London Ltd | Transport & logistics | 2023 |
| Remstor Services Ltd | Information & communication | 2003 |
| Renaissence Global Ltd | Hospitality | 2021 |
| Renarch Consultancy Limited | Information & communication | 2012 |
| Rendition Films Limited | Information & communication | 2016 |
| Reniston Ltd | Construction | 2023 |
| Renit Consultancy Limited | Information & communication | 2008 |
| Reno Consulting Ltd | Construction | 2023 |
| Renovate Properties Ltd | Construction | 2007 |
| Rent My Property UK Ltd | Real estate | 2014 |
| Rent With GT Ltd | Real estate | 2022 |
| Rentashisha Ltd | Wholesale & retail | 2020 |
| Rentifyglobal Ltd | Information & communication | 2026 |
| Renting Property Limited | Real estate | 2023 |
| Rentluxurycar Ltd | Construction | 2019 |
| Rentnsales Ltd | Real estate | 2020 |
| Rentoe Limited | Information & communication | 2025 |
| Renutra Labs Ltd | Manufacturing | 2026 |
| Renwest Health Care Services Ltd | Health & social care | 2022 |
| Repaymet Ltd | Financial services | 2018 |
| Repede Ltd | Construction | 2024 |
| Replacement Badges Limited | Wholesale & retail | 2020 |
| Repot IT Ltd | Wholesale & retail | 2026 |
| Repton Racing Ltd | Wholesale & retail | 2020 |
| Reptons Investment Ltd | Real estate | 2021 |
| Reptors Property Management Ltd | Other services | 2023 |
| Republic Security Ltd | Information & communication | 2022 |
| Reputex FM Ltd | Administrative & support | 2025 |