| Ronima Limited | Construction | 2022 |
| Roo's Beach Limited | Wholesale & retail | 2015 |
| Rooke Legal Limited | Professional & scientific | 2019 |
| Room at the Inn Limited | Hospitality | 1999 |
| ROOM9 Group Limited | Professional & scientific | 2017 |
| Roomoo Ltd | Other services | 2024 |
| Roop Investments (GP) Limited | Financial services | 2010 |
| Roop Investments L.P. | | 2010 |
| Roost Services Ltd | Construction | 2017 |
| Rooted Support Limited | Information & communication | 2013 |
| Roquet 105 Limited | Real estate | 2019 |
| Roquet 203 Limited | Extraterritorial | 2010 |
| Roquet Properties Limited | Real estate | 2015 |
| Roquet Properties NO2 Limited | Other services | 2018 |
| Roquet Properties NO20 Limited | Real estate | 2017 |
| Roquet Properties NO5 Limited | Other services | 2019 |
| Roquet Properties NO6 Limited | Other services | 2020 |
| Roquet Properties NO7 Limited | Other services | 2022 |
| Roquet Properties NO8 Limited | Other services | 2022 |
| Rosalind Webb Limited | Administrative & support | 2015 |
| Rose Electrical Services (RES) Ltd | Construction | 2025 |
| Rosemary Cottages Management Company Limited | Households | 2018 |
| Rosepatch Ltd | Health & social care | 2022 |
| Rosesscents Ltd | Wholesale & retail | 2014 |
| Rosillie Ltd | Information & communication | 2026 |
| Roso Solutions Limited | Health & social care | 2012 |
| Ross Robinson Ltd | Administrative & support | 2019 |
| Rostaz Limited | Construction | 2021 |
| Rouen Properties Residents Limited | Households | 2014 |
| Round Brick Residential Ltd | Households | 2018 |
| Round Table TCG Limited | Wholesale & retail | 2021 |
| Roundset (Southern) Limited | Construction | 1992 |
| Roundset Developments Ltd | Construction | 1960 |
| Routine Marine Limited | Manufacturing | 2026 |
| Rovers the Dog Exercisers Ltd | Other services | 2022 |
| Rowan Investments Limited | Construction | 1997 |
| Rowan Stays Ltd | Hospitality | 2025 |
| Rowena Jeanes Ltd | Manufacturing | 2018 |
| Rowsell Farming Limited | Agriculture & fishing | 2013 |
| Roycraft Limited | Financial services | 1990 |
| RPS Express Limited | Transport & logistics | 2012 |
| RR Arts and Media Ltd | Arts & recreation | 2025 |
| RR Property Care Ltd | Administrative & support | 2023 |
| Rraw K Ltd | Professional & scientific | 2017 |
| Rraw Systems Ltd | Professional & scientific | 2025 |
| Rraw X Ltd | Professional & scientific | 2017 |
| Rraw Y Ltd | Professional & scientific | 2017 |
| Rraw Z Ltd | Professional & scientific | 2017 |
| RRD Building and Maintenance Limited | Administrative & support | 2009 |
| RS1 Consulting Limited | Information & communication | 2016 |
| RSE Insight Limited | Education | 2017 |
| RTB Tyres Ltd | Extraterritorial | 2012 |
| RTS Poker Limited | Manufacturing | 2017 |
| Rubber Duckers Ltd | Manufacturing | 2019 |
| Rubble Systems Ltd | Manufacturing | 2024 |
| Ruby Ocean Trading (UK) Limited | Construction | 2014 |
| Rudy Winchester Limited | Hospitality | 2023 |
| Ruedex International Limited | Information & communication | 2024 |
| Runcton Farm Shop Limited | Wholesale & retail | 2026 |
| Rupert Cook Ventures Limited | Professional & scientific | 2021 |
| Rural Property Search Ltd | Real estate | 2023 |
| Rushby Exec Ltd | Administrative & support | 2018 |
| Russell's Landscaping & Maintenance Ltd | Administrative & support | 2024 |
| Rutland London Limited | Manufacturing | 2015 |
| RVC Building and Property Maintenance Services Limited | Construction | 2002 |
| RVC Properties Limited | Real estate | 2026 |
| RW Lomond JG Ltd | Construction | 2019 |
| Rybro International Limited | Wholesale & retail | 2004 |
| Rycroft Advisory Limited | Professional & scientific | 2025 |
| Ryde Way Ltd | Transport & logistics | 2024 |
| Ryder & Chalk Building Services Limited | Construction | 2017 |
| S B & B Land Limited | Construction | 2010 |
| S D Morris Refrigeration Limited | Manufacturing | 2007 |
| S H Enterprises Limited | Real estate | 1947 |
| S J Fielder Limited | Real estate | 2017 |
| S J King Plumbing and Heating Limited | Construction | 2003 |
| S J Tiley Limited | Agriculture & fishing | 2009 |
| S Osborne Limited | Other services | 2024 |
| S Sobhy Ltd | Health & social care | 2019 |
| S&F Retail Limited | Wholesale & retail | 2023 |
| S&G Security Services Ltd | Administrative & support | 2024 |
| S.E.B.R Holdings Ltd | Real estate | 2026 |
| S.M Professional Builders Ltd | Construction | 2024 |
| S.M. Bartlett Builders Ltd | Manufacturing | 2002 |
| S2 MAX Ltd | Extraterritorial | 2015 |
| S20 Limited | Professional & scientific | 2025 |
| SAB Trade Cars Limited | Wholesale & retail | 2014 |
| Saba Capital Ltd | Professional & scientific | 2021 |
| Saba Ltd | Financial services | 2024 |
| Saddleback Farm Shop Limited | Wholesale & retail | 2012 |
| Safe Air Schools UK CIC | Education | 2025 |
| Safec Design & Test Limited | Extraterritorial | 2013 |
| Safety Network Limited | Professional & scientific | 2009 |
| Safety-Critical Systems Club C.I.C. | Education | 2020 |
| Sagaris Holdings Limited | Financial services | 2021 |
| Sage Living Spaces Ltd | Administrative & support | 2014 |
| Sailing Winds Limited | Professional & scientific | 2020 |
| Saints Servers Limited | Information & communication | 2004 |
| Saisei Wellness, Therapies & Consultancy Ltd | Health & social care | 2022 |
| Salamis Properties Limited | Real estate | 2020 |