| Residential Ventures Limited | Real estate | 2015 |
| Resolve Resin Flooring Ltd | Construction | 2023 |
| Reuben Chase Ltd | Real estate | 2011 |
| Revenant Limited | Professional & scientific | 2017 |
| Revive Fitness Limited | Arts & recreation | 2021 |
| REX & Friends Rights Limited | Information & communication | 2015 |
| REX Developments LLP | | 2007 |
| REX Land (Alpha) Limited | Real estate | 2024 |
| REX Land (Basildon) Industrial Limited | Real estate | 2021 |
| REX Land (Basildon) Ltd | Real estate | 2016 |
| REX Land (Basildon) Retail 2 Limited | Real estate | 2021 |
| REX Land (Beta) Ltd | Real estate | 2022 |
| REX Land (Glastonbury) 2 Limited | Real estate | 2023 |
| REX Management Services LLP | | 2007 |
| REX Partners LLP | | 2006 |
| REX Trade Associates Limited | Administrative & support | 2007 |
| RFD Promotions Ltd | Professional & scientific | 2016 |
| RG Surfacing Ltd | Construction | 2024 |
| RGG Consult Ltd | Information & communication | 2021 |
| RH Ecommerce Ltd | Wholesale & retail | 2023 |
| Rice's Solar and Roofing Ltd | Energy | 2023 |
| Richard Joseph Plumbing & Heating Ltd | Construction | 2025 |
| Riche Media Limited | Professional & scientific | 2017 |
| Riches Waterproofing Ltd | Construction | 2023 |
| Riderecyclerepeat Ltd | Administrative & support | 2026 |
| Riff Factory Limited | Information & communication | 2017 |
| Rigg East Ltd | Construction | 2022 |
| Right Advance Digital Ltd | Information & communication | 2026 |
| Right Development Sports Ltd | Administrative & support | 2017 |
| Riksoni Ltd | Real estate | 2025 |
| Rise N Reform Ltd | Arts & recreation | 2025 |
| Risks Group Ltd | Transport & logistics | 2019 |
| Risks Trading Ltd | Wholesale & retail | 2024 |
| Ritch Scaffolding Ltd | Construction | 2025 |
| Rivera Developers Ltd | Construction | 2021 |
| Riverside Gymnastics Academy Ltd | Arts & recreation | 2021 |
| Riverview MOT Ltd | Wholesale & retail | 2024 |
| RIZ Consulting Ltd | Health & social care | 2010 |
| Rjpheatingservices Ltd | Construction | 2022 |
| RK Property (London) Limited | Real estate | 2020 |
| RKW Suppliers Ltd | Wholesale & retail | 2022 |
| RL Manufacturing Solutions Ltd | Professional & scientific | 2024 |
| RMS@13 Ltd | Health & social care | 2018 |
| RMS@13 Properties Limited | Real estate | 2022 |
| RNA Electrical Ltd | Construction | 2025 |
| Rnrw Ltd | Extraterritorial | 2023 |
| Robert Howden (Southend) Limited | Health & social care | 1968 |
| Roberts Customs Ltd | Manufacturing | 2021 |
| Robmar Ventures Limited | Professional & scientific | 2025 |
| Robwhen Coaching Ltd | Education | 2021 |
| Rockins Beauty Limited | Wholesale & retail | 2019 |
| Rockstone Properties Ltd | Real estate | 2025 |
| Roessomi Holdings Ltd | Real estate | 2024 |
| Roll & Rise Ventures Ltd | Financial services | 2025 |
| Roomee Space Ltd | Information & communication | 2019 |
| Roomee Wellness Limited | Other services | 2015 |
| Roomes Stores,Limited | Wholesale & retail | 1927 |
| Rosanna Lawes Consulting Ltd | Construction | 2025 |
| Rose Estates Limited | Real estate | 2001 |
| Rose FIN Limited | Wholesale & retail | 2025 |
| Rosemead Properties Limited | Real estate | 2017 |
| Rossmore Property Investments Limited | Financial services | 2008 |
| Roteniya Ltd | Wholesale & retail | 2023 |
| Rothwell Interiors Ltd | Construction | 2017 |
| Roto Innovations Limited | Extraterritorial | 2010 |
| RS Consult Services Ltd | Professional & scientific | 2025 |
| RS Control Solutions Limited | Construction | 2018 |
| RS Pharma Services Limited | Professional & scientific | 2019 |
| RSJ Scaffolding Ltd | Construction | 2010 |
| RTG Maintenance Ltd | Construction | 2025 |
| Rubi Hospitality Ltd | Hospitality | 2026 |
| Rubi Marketing Agency Limited | Professional & scientific | 2023 |
| Rule One Group Limited | Construction | 2023 |
| Rule One Scaffolding Limited | Construction | 2023 |
| Runley Motors Limited | Wholesale & retail | 2019 |
| Rushbrook Haulage Ltd | Transport & logistics | 2023 |
| Ruskins Tree Surgery Limited | Agriculture & fishing | 1993 |
| Rust Print Finishers Limited | Manufacturing | 2025 |
| RWT Electrical Limited | Construction | 2003 |
| S & M Group Ltd | Real estate | 2022 |
| S B Carpentry & Maintenance Ltd | Extraterritorial | 2023 |
| S D Medical Services Ltd | Health & social care | 2017 |
| S E W S Ductwork Services Ltd | Construction | 2005 |
| S L Khan Consulting Limited | Financial services | 2026 |
| S Piticaru Construction Ltd | Construction | 2022 |
| S W B Networks Ltd | Information & communication | 2018 |
| S&K Surfacing Limited | Construction | 2024 |
| S-Lux Property Ltd | Households | 2023 |
| S.B National Electrical Contractors Limited | Construction | 2016 |
| S.States Limited | Real estate | 2014 |
| Saaz Ventures Ltd | Hospitality | 2026 |
| Sacred Heart of Mary Girls' School | Education | 2011 |
| Safewalk Limited | Real estate | 1986 |
| Saffie Investments Limited | Financial services | 2016 |
| Saffron Acquisitionco Limited | Professional & scientific | 2019 |
| Saffron Midco Limited | Professional & scientific | 2019 |
| Saffron Topco Limited | Professional & scientific | 2019 |
| Saidhoon Ltd | Wholesale & retail | 2019 |
| Saidhoon Properties Ltd | Real estate | 2024 |
| Saint Rocks Jewellers Ltd | Wholesale & retail | 2023 |