| Roab Developments Limited | Wholesale & retail | 2026 |
| Roach-Price Asset Management Ltd | Financial services | 2018 |
| ROB Dance Group Limited | Professional & scientific | 2023 |
| ROB Dance Limited | Professional & scientific | 2023 |
| ROB Owen Screeding Ltd | Construction | 2013 |
| Robert Davies Sports Travel Limited | Administrative & support | 2003 |
| Robert Gooch & Co Accountants Ltd | Professional & scientific | 2008 |
| Robert J Shawyer Limited | Professional & scientific | 2015 |
| Robert Reborn Ltd | Information & communication | 2018 |
| Robertson Transport Services Limited | Transport & logistics | 2007 |
| Robin Thorsten Ltd | Construction | 2020 |
| Robin Williams Electrical Services Ltd | Construction | 2015 |
| Robinson O'Neill Properties Limited | Real estate | 2025 |
| Robot Logistics Ltd | Transport & logistics | 2025 |
| Robwood Green Ltd | Professional & scientific | 2022 |
| Rock Commercials Limited | Wholesale & retail | 2006 |
| Rock Equipment Ltd | Mining & quarrying | 2023 |
| Rock I.T. Specialists Limited | Information & communication | 2008 |
| Rock Professional Services Limited | Information & communication | 2016 |
| Rockbell Limited | Extraterritorial | 2026 |
| Rockcade Limited | Extraterritorial | 2023 |
| Rockford Limited | Extraterritorial | 2025 |
| Rockwool Limited | Manufacturing | 1970 |
| Rockwool Trustees Limited | Professional & scientific | 1979 |
| ROD and KEN Care Services Limited | Health & social care | 2016 |
| Rodi Foods Ltd | Hospitality | 2024 |
| Rodogno Consultants Ltd | Professional & scientific | 2008 |
| Roger Thomas Limited | Professional & scientific | 2014 |
| Roluu Limited | Extraterritorial | 2008 |
| Roma Medical Aids Limited | Manufacturing | 1984 |
| ROMANS818 Ltd | Wholesale & retail | 2025 |
| Ronnoco Data Installations Limited | Information & communication | 2006 |
| Roofers Direct Ltd | Construction | 2026 |
| Rooney Building Services Limited | Construction | 2024 |
| Rops Ltd | Professional & scientific | 2020 |
| Rosa Petulengro Ltd | Other services | 2019 |
| Rose Grace (South Wales) Ltd | Financial services | 2009 |
| Rose in MAY Limited | Manufacturing | 2018 |
| Rose on the Hill Holdings Limited | Real estate | 2025 |
| Rose on the Hill Properties Limited | Real estate | 2025 |
| Rosecave Limited | Extraterritorial | 2026 |
| Rosewood Construction Residential & Commercial Builders Limited | Construction | 2003 |
| Rossback Limited | Extraterritorial | 2026 |
| Rosser & Sons Properties Ltd | Real estate | 2019 |
| Rosshale Limited | Extraterritorial | 2023 |
| Roto Tool Engineering Limited | Manufacturing | 1997 |
| Rowankey Limited | Extraterritorial | 2024 |
| Rowanlea Limited | Information & communication | 2024 |
| Rowanson Limited | Extraterritorial | 2026 |
| Roys Webdesign Limited | Extraterritorial | 2009 |
| RPD Consult Limited | Professional & scientific | 2015 |
| RPT Structural Detailing Ltd. | Professional & scientific | 2017 |
| RRA Retail Limited | Wholesale & retail | 2026 |
| RRT Transport Ltd | Transport & logistics | 2018 |
| Rs-Je Solutions Limited | Construction | 2019 |
| RSJ Medical Ltd | Health & social care | 2019 |
| RSJ Property Investments Ltd | Real estate | 2026 |
| RT Brickwork Services Ltd | Construction | 2026 |
| RT Plumbing & GAS Ltd | Construction | 2023 |
| Rtmdrylining Ltd | Construction | 2020 |
| RTW Builders Ltd | Construction | 2025 |
| RTW1 Developments Limited | Construction | 2025 |
| Rubberduck Heating Ltd | Construction | 2012 |
| Rubella Holdings Limited | Financial services | 2019 |
| Rudnicki Property Limited | Real estate | 2023 |
| Ruffy Holdings Ltd | Professional & scientific | 2025 |
| Rune Cube Studios Ltd | Information & communication | 2025 |
| Ruskinn Technology Limited | Manufacturing | 2006 |
| Russell Read Limited | Professional & scientific | 2004 |
| Ruthgabriels Ltd | Wholesale & retail | 2022 |
| RVS Engineering (2008) Limited | Manufacturing | 2008 |
| Rwildmedia Ltd | Information & communication | 2011 |
| RWP Ltd | Construction | 2020 |
| RX8ADAPTERSUK Ltd | Professional & scientific | 2024 |
| Ryan Day Snooker Limited | Arts & recreation | 2007 |
| Ryan Haberfield Ltd | Arts & recreation | 2012 |
| Ryan Searle Brickwork Ltd | Construction | 2026 |
| Ryte Hydraulics Limited | Professional & scientific | 1994 |
| S & a Williams LLP | | 2009 |
| S & J Electrical Solutions Ltd | Construction | 2020 |
| S & J Glass Equipment Limited | Financial services | 1987 |
| S & L Brickwork &Property Maintenance Limited | Construction | 2021 |
| S & NY Limited | Hospitality | 2025 |
| S & R T Properties Ltd | Real estate | 2024 |
| S & S Entertainment Ltd | Wholesale & retail | 2016 |
| S Co Limited | Wholesale & retail | 2016 |
| S Group Ventures Ltd | Hospitality | 2026 |
| S Lewis Transport Limited | Transport & logistics | 2002 |
| S M W Builders Limited | Construction | 2003 |
| S Packwood Welding Limited | Construction | 2022 |
| S R Middleton and SON Roofing Limited | Construction | 2010 |
| S W S N S Safety Ltd | Construction | 2023 |
| S Wood Products Limited | Manufacturing | 2003 |
| S&M Waste Removals Limited | Water & waste | 2019 |
| S.A Morgan Holdings Ltd | Real estate | 2021 |
| S.G Electrical & Property Maintenance Limited | Construction | 2023 |
| S.J. Fuller Autobodies Limited | Wholesale & retail | 2000 |
| S.T.A.R.S Community Housing Community Interest Company | Health & social care | 2013 |
| S.T.A.R.S. Domiciliary Care Limited | Health & social care | 2012 |
| S.T.E.E.R - the Enterprise Academy | Education | 2013 |