| Robert Charles 2 UK Ltd | Health & social care | 2022 |
| Robert Deme & Sons Ltd | Administrative & support | 2020 |
| Robert Lewis & Redbond Accountants (UK) Limited | Professional & scientific | 2011 |
| Robert Lewis & Redbond Group Limited | Administrative & support | 2012 |
| Robert Lewis Accountants (Essex) Limited | Professional & scientific | 2015 |
| Robert Lewis Accountants Group Limited | Professional & scientific | 2015 |
| Robert Lewis Capital Limited | Financial services | 2016 |
| Robert Lewis Consultancy Limited | Professional & scientific | 2014 |
| Robert Lewis Formations Limited | Administrative & support | 2012 |
| Robert Lewis Group Limited | Professional & scientific | 2008 |
| Robert Lewis Redbond Croft & Co Limited | Professional & scientific | 2022 |
| Roberts & Parish Services Limited | Construction | 2015 |
| Roberts & Sale Construction (UK) Ltd | Construction | 2017 |
| Roberts & Sale Property Limited | Real estate | 2024 |
| Roblue Limited | Construction | 2018 |
| Robosol Software UK Limited | Information & communication | 2010 |
| Rochester Mews Street Management Ltd | Real estate | 2024 |
| Rochfords Tree Services Limited | Agriculture & fishing | 2020 |
| Rock Minerals Limited | Mining & quarrying | 2026 |
| Rock Solid Group Ltd | Administrative & support | 2020 |
| Rockcrest Design Ltd | Professional & scientific | 2025 |
| Rocketland Limited | Professional & scientific | 2013 |
| Rocklawf Limited | Transport & logistics | 2018 |
| Rococo (Leigh) Limited | Hospitality | 2017 |
| Roda Property Investment Limited | Real estate | 2025 |
| Rodal Anti-Slip Solutions Ltd | Administrative & support | 2003 |
| Rodica Impex Cleaning Ltd | Wholesale & retail | 2025 |
| Rodliffe Accounting Limited | Professional & scientific | 2006 |
| Rodwell - H T B Limited | Extraterritorial | 1971 |
| Rodwell Engineering Group Limited | Manufacturing | 1951 |
| Rodwell Group Services Limited | Extraterritorial | 1956 |
| Rodwell Property Construction Ltd | Construction | 2018 |
| Rodwell Property Investments Limited | Real estate | 2014 |
| Rodwell Property Limited | Construction | 2014 |
| Rodwell-Bayne Limited | Extraterritorial | 1969 |
| ROG Apex Living Ltd | Health & social care | 2026 |
| Rogalski Online Store Limited | Wholesale & retail | 2025 |
| ROJ Restaurant Ltd | Hospitality | 2019 |
| Rola Consultants Limited | Professional & scientific | 2014 |
| Rolad Limited | Other services | 2021 |
| Rolandas Dajoras Ltd | Transport & logistics | 2019 |
| Rolems UK Limited | Information & communication | 2003 |
| Rolex Business Advisory Limited | Professional & scientific | 2026 |
| Rollco Group Holdings Limited | Financial services | 2015 |
| Rollco Properties Limited | Real estate | 2015 |
| Rolling Components Limited | Wholesale & retail | 1984 |
| Rolls Flooring Limited | Construction | 2023 |
| Roman Brickwork Ltd | Construction | 2026 |
| Romans Electrical Services Limited | Construction | 2018 |
| Romarket Wholesales Limited | Wholesale & retail | 2018 |
| Romeo AJ Roofing Limited | Construction | 2025 |
| Romford Motors Basildon Ltd | Wholesale & retail | 2024 |
| Roms & D Limited | Wholesale & retail | 2017 |
| Ronidale Limited | Real estate | 2001 |
| Roof Envy Limited | Construction | 2020 |
| Roof in a Box Limited | Manufacturing | 2025 |
| Roof Singh Ltd | Construction | 2022 |
| Roofing Supply Limited | Construction | 2024 |
| Roofright Waterproofing Ltd | Construction | 2021 |
| Rook and Knight Apparel Limited | Wholesale & retail | 2024 |
| Room Raffle Ltd | Other services | 2020 |
| Rooney Management & Co. Limited | Professional & scientific | 2025 |
| Roosi Properties Ltd | Real estate | 2020 |
| Root HR Limited | Information & communication | 2026 |
| Rosary Court Freehold Limited | Households | 2017 |
| Rosbaltica Ltd | Transport & logistics | 2020 |
| Rose BTL Limited | Real estate | 2015 |
| Rose Construction (Essex) Limited | Construction | 2019 |
| Rose Construction Services Limited | Construction | 2019 |
| Rose Engineering (UK) Limited | Professional & scientific | 2011 |
| Rose Flags Limited | Construction | 2019 |
| Rosemount (11) Ltd | Financial services | 2015 |
| Rosemount (GSS) Limited | Real estate | 2026 |
| Rosemount (OS) Limited | Real estate | 2026 |
| Rosemount Investments Limited | Construction | 1999 |
| Rosemount Southwark Ltd | Financial services | 2013 |
| Roseville Europe Ltd | Construction | 2010 |
| Rosin Electrical Ltd | Construction | 2024 |
| Roskosh Limited | Wholesale & retail | 2022 |
| Ross Flooring Limited | Construction | 2015 |
| Rossi Beach Limited | Professional & scientific | 2017 |
| Rotaru Family Service Ltd | Construction | 2025 |
| Rotimi 1976 Limited | Health & social care | 2025 |
| Rotus Limited | Transport & logistics | 2018 |
| Round Rivals Ltd | Information & communication | 2025 |
| Round Table Logistics Limited | Wholesale & retail | 2019 |
| Rovert Media Ltd | Information & communication | 2009 |
| Rovexia Limited | Administrative & support | 2026 |
| Rowan Europe Distribution Limited | Administrative & support | 2015 |
| Rowan Holdings 2022 Limited | Financial services | 2022 |
| Rowan International Bidco Limited | Professional & scientific | 2017 |
| Rowan International Limited | Wholesale & retail | 1990 |
| Rowan International Topco Limited | Financial services | 2017 |
| Rowan UK Distribution Limited | Wholesale & retail | 1996 |
| Rowdex Limited | Transport & logistics | 2025 |
| Rowene Limited | Real estate | 2025 |
| Rowland Vehicle Services Limited | Wholesale & retail | 2025 |
| Rowzac Utilities Ltd | Construction | 2026 |
| Roxy Cinema BA Limited | Arts & recreation | 2020 |
| Roxy Hair Extensions Limited | Other services | 2010 |