| Rosa Roja Limited | Real estate | 2020 |
| Rosconn (Cubbington) Limited | Construction | 2013 |
| Rosconn (Dawn Run) Limited | Construction | 2014 |
| Rosconn (Denman) Limited | Construction | 2014 |
| Rosconn (Heather) Ltd | Construction | 2015 |
| Rosconn (Scholars Lane) Limited | Construction | 2013 |
| Rosconn (Shepshed) Limited | Construction | 2013 |
| Rosconn (Welford on Avon) Limited | Construction | 2014 |
| Rosconn Commercial Limited | Construction | 2020 |
| Rosconn Developments Limited | Construction | 2008 |
| Rosconn Group Limited | Administrative & support | 2005 |
| Rosconn Holdings Ltd | Financial services | 2015 |
| Rosconn Homes (Warwickshire) Limited | Construction | 2012 |
| Rosconn Homes UK Ltd | Construction | 2018 |
| Rose Consultancy Service Limited | Professional & scientific | 2016 |
| Rose MED Private Ltd | Health & social care | 2025 |
| Rose Salmon Industries Ltd | Extraterritorial | 2017 |
| Rosecaps Limited | Hospitality | 2023 |
| Rosehurst Developments Ltd | Extraterritorial | 2015 |
| Rosemount Aerospace Limited | Manufacturing | 1993 |
| Rosemount Aerospace Properties Limited | Transport & logistics | 2002 |
| Roses Outreach Limited | Health & social care | 2022 |
| Rosmarino London Ltd | Wholesale & retail | 2021 |
| Rosper MEP Limited | Professional & scientific | 2025 |
| Ross Deffley Services Ltd | Administrative & support | 2019 |
| Rossi Studio Ltd | Professional & scientific | 2019 |
| Rossie Construction Ltd | Construction | 2025 |
| Rouds Property Group Ltd | Real estate | 2025 |
| Rouge Automotive Design Limited | Professional & scientific | 2022 |
| Round Midnight Creative Arts Limited | Arts & recreation | 2010 |
| Round Midnight Ltd | Information & communication | 2000 |
| Round the Corner Ltd | Professional & scientific | 2026 |
| Roundelay (Snitterfield) Management Company Limited | Households | 2019 |
| Rouse Kent (Residential) Limited | Construction | 1998 |
| Route Runner Logistics Ltd | Transport & logistics | 2026 |
| Rowan Place (Stowmarket) Management Company Limited | Real estate | 2016 |
| Rowan Property Limited | Real estate | 2015 |
| Rowanall Limited | Real estate | 2021 |
| Rowangold Limited | Information & communication | 1985 |
| Rowe Partners Ltd | Professional & scientific | 2026 |
| Rowley Hughes Thompson LLP | | 2006 |
| Rowood House Management Limited | Extraterritorial | 2001 |
| Roworks Solutions Ltd | Construction | 2026 |
| Rowthorn Consultants Limited | Real estate | 2015 |
| Rowthorn Properties Ltd | Real estate | 2021 |
| ROY Brother's Hospitality Ltd. | Transport & logistics | 2015 |
| Roya Beauty Ltd | Other services | 2026 |
| RP Dent (I) Limited | Health & social care | 2023 |
| RP Medical Ltd | Health & social care | 2016 |
| RP Property Revolutions Limited | Real estate | 2023 |
| RP Psychiatry Ltd | Health & social care | 2025 |
| RPC & Associates Ltd | Health & social care | 2025 |
| RPC Beauty Ltd | Other services | 2025 |
| RPM Healthcare Ltd | Health & social care | 2024 |
| RPQ Ltd | Professional & scientific | 2008 |
| Rprefurbishment Limited | Construction | 2024 |
| RR Associates Ltd | Professional & scientific | 2014 |
| RR Brands Consultancy Ltd | Wholesale & retail | 2019 |
| RR Business Services LLP | | 2026 |
| Rrapi Constructions Ltd | Construction | 2022 |
| RRJ Capital Limited | Real estate | 2015 |
| RS Business Transformation Ltd | Administrative & support | 2020 |
| RS Developments (Midlands) Ltd | Real estate | 2025 |
| RS Engineering Group Limited | Professional & scientific | 2016 |
| RS Jaganathan Limited | Health & social care | 2010 |
| RS Plastering Services Ltd | Construction | 2022 |
| RS Pro-Spray Ltd | Construction | 2022 |
| RS Transport (Midlands) Ltd | Transport & logistics | 2019 |
| RS UK Holdings Ltd | Financial services | 2025 |
| RS UK Invest Ltd | Real estate | 2025 |
| RS World Trading Limited | Wholesale & retail | 2019 |
| RS3 Holdings Ltd | Financial services | 2021 |
| RS7 Consulting Limited | Professional & scientific | 2004 |
| Rsaa Enterprises Limited | Wholesale & retail | 2021 |
| Rsav Productions Ltd | Administrative & support | 2025 |
| RSB Poultry Services Limited | Administrative & support | 2009 |
| RSB Property Ltd | Real estate | 2023 |
| Rsbb Properties Ltd | Construction | 2026 |
| RSC 82 Ltd | Real estate | 2022 |
| Rsconsult Limited | Professional & scientific | 2013 |
| RSJ Build Limited | Construction | 2011 |
| RSL UK Properties Limited | Real estate | 2024 |
| RSM Care Links Ltd | Administrative & support | 2023 |
| RSP Asset Management Limited | Financial services | 2025 |
| RSW Electrical Services Limited | Construction | 2021 |
| RSW Engineering Ltd | Manufacturing | 2025 |
| RSW Property Management Ltd | Households | 2025 |
| RT Gate Automation Ltd | Wholesale & retail | 2023 |
| RTG Solutions Limited | Information & communication | 2024 |
| RTP Residential Limited | Real estate | 2026 |
| RTS Contractors Ltd | Construction | 2025 |
| Rtsy Property Limited | Real estate | 2024 |
| RU YI Chinese Acupuncture Centre Ltd | Other services | 2026 |
| Rubicon Trans Limited | Transport & logistics | 2024 |
| Rubric Automation Ltd | Professional & scientific | 2026 |
| Ruckleigh Early Years Limited | Education | 2006 |
| Ruckleigh Holdings Limited | Education | 1944 |
| Ruckleigh Schools Limited | Education | 1998 |
| Rudholm UK Ltd | Wholesale & retail | 2000 |
| Rugby Football Consultants Limited | Professional & scientific | 1992 |