| Rival Investments Limited | Financial services | 2003 |
| Rivendell Group Limited | Hospitality | 2016 |
| Rivendell Hideaway Guest Services Limited | Hospitality | 2016 |
| Rivendell Hideaway Limited | Hospitality | 2014 |
| River Court 1 RTM Company Limited | Households | 2022 |
| River Court 2-3 RTM Company Limited | Households | 2022 |
| River Court 4-6 RTM Company Limited | Households | 2022 |
| River Garden Care Ltd | Administrative & support | 2014 |
| River Haven Court Ltd | Households | 2024 |
| Rivett Limited | Information & communication | 2015 |
| RIZ Group Ltd | Wholesale & retail | 2022 |
| Rize Consultancy Ltd | Professional & scientific | 2020 |
| RJ Outdoor Consultancy Limited | Professional & scientific | 2017 |
| RJC Financial Management Limited | Professional & scientific | 2011 |
| RJC Property Holdings Ltd | Real estate | 2021 |
| RJD & Sons (Builders) Limited | Construction | 2017 |
| RJG Building Limited | Construction | 2025 |
| RJM Estate Management Limited | Construction | 2021 |
| RJT Agencies Limited | Wholesale & retail | 2020 |
| RK Engineering Limited | Professional & scientific | 2025 |
| RK Global Recruitment Ltd | Administrative & support | 2025 |
| RKS Building Ltd | Construction | 2025 |
| RL Autos (London) Ltd | Wholesale & retail | 2019 |
| RL Equestrian Ltd | Wholesale & retail | 2023 |
| Rlee Services Ltd | Administrative & support | 2018 |
| RLW Maintenance Ltd | Professional & scientific | 2024 |
| RM 99 Business Solutions Ltd | Education | 2026 |
| RM Cleans Limited | Administrative & support | 2026 |
| RMC Accountants Ltd | Professional & scientific | 2015 |
| RMC Plant Ltd | Wholesale & retail | 2019 |
| Rmja Editor Ltd | Information & communication | 2020 |
| RMM SPV 2 Ltd | Other services | 2025 |
| RMS Steelfixing Ltd | Construction | 2019 |
| RN Creative Limited | Information & communication | 2020 |
| RND Motors Ltd | Wholesale & retail | 2026 |
| RNE Exhibitions Ltd | Administrative & support | 2022 |
| RNU Labs Ltd | Wholesale & retail | 2025 |
| RO & MAD Investment Limited | Financial services | 2024 |
| Roadside Business Solutions Ltd | Wholesale & retail | 2021 |
| Roadster Technologies Ltd | Information & communication | 2020 |
| Roar Compassion Ltd | Real estate | 2026 |
| Roarlight Ltd | Information & communication | 2017 |
| ROB Finley Limited | Professional & scientific | 2009 |
| ROB Hutchinson Photo Video Ltd | Information & communication | 2026 |
| ROB James Mechanical Limited | Wholesale & retail | 2024 |
| ROB Services Ltd | Hospitality | 2025 |
| ROB Streeter Photography Limited | Professional & scientific | 2014 |
| Robert Fish Associates LLP | | 2026 |
| Robester Consulting Ltd | Professional & scientific | 2016 |
| Robin&Co Limited | Information & communication | 2026 |
| Robins Court (Grove Park) Limited | Real estate | 1986 |
| Robinson Court (Chalfont Road) RTM Company Limited | Real estate | 2021 |
| Robitech Ltd | Manufacturing | 2015 |
| Robur Capital Ltd | Financial services | 2024 |
| Rock House Limited | Households | 1983 |
| Rock Partners Recruitment Ltd | Administrative & support | 2023 |
| Rocket Jump Limited | Information & communication | 2020 |
| Rocket Science Limited | Information & communication | 2005 |
| Rockinham Services Limited | Real estate | 2013 |
| Rocktopia Limited | Information & communication | 2015 |
| Roddy New Homes (Canterbury) Ltd | Construction | 2019 |
| Roddy New Homes (Kent) Ltd | Construction | 2020 |
| Roger Hancock Limited | Arts & recreation | 1961 |
| ROJ Fish Bar Limited | Hospitality | 2025 |
| Roks Electrical Ltd | Extraterritorial | 2019 |
| Rolo Academy Ltd | Education | 2026 |
| Rolo Rentals Ltd | Real estate | 2025 |
| Roma Management Services Limited | Households | 2007 |
| Roman Brothers Ltd | Wholesale & retail | 2021 |
| Roman House Management Company Limited | Households | 1999 |
| Romeo QS Ltd | Professional & scientific | 2024 |
| Romoli Imports Limited | Wholesale & retail | 2026 |
| RON Magrath Services Limited | Wholesale & retail | 1975 |
| Ronald's Spring Water Limited | Manufacturing | 2024 |
| Ronin Marketing Limited | Professional & scientific | 2001 |
| Ronverlodge Limited | Households | 1972 |
| Ronyuv Property Investments Ltd | Real estate | 2023 |
| Rookery Estate (Downe) Limited | Households | 2009 |
| Rookery Park Barns Accommadation Ltd | Real estate | 2025 |
| Roomcreative LLP | | 2025 |
| Rooms 2 LET London Ltd | Real estate | 2019 |
| Root Pilates Ltd | Arts & recreation | 2026 |
| Rooted in Wellness Ltd | Administrative & support | 2024 |
| Rooting for YOU Gardening Ltd | Administrative & support | 2025 |
| Roots & Shoots Bromley Limited | Wholesale & retail | 2019 |
| Roots Electrical Collective Ltd | Construction | 2024 |
| Roozdent Limited | Health & social care | 2019 |
| Rope Street Ltd | Other services | 2008 |
| Rosanna Alfonso Developments Ltd | Real estate | 2020 |
| Rose and Beauford Ltd | Professional & scientific | 2021 |
| Rose House Care Home Ltd | Health & social care | 2015 |
| Rosebank Residents Limited | Real estate | 1999 |
| Rosegate Event Styling Limited | Other services | 2025 |
| Roseheath Advisory Limited | Extraterritorial | 2013 |
| Rosehill Triangle (2003) Management Company Limited | Households | 2003 |
| Rosemary Court Property Management Limited | Real estate | 1991 |
| Rosemead Gardens Management Company Limited | Households | 2005 |
| Rosemere Place (Bromley) Management Co Ltd | Households | 2019 |
| Roseplace Limited | Households | 1987 |
| Roses Property Investments Limited | Financial services | 2020 |