| Regis Commercial Limited | Real estate | 1998 |
| Regis Entertainment Investments NO 1 Limited | Real estate | 2004 |
| Regis Entertainment Investments NO 2 Limited | Real estate | 2008 |
| Regis Entertainment Limited | Hospitality | 2005 |
| Regis Entertainment NO.2 Limited | Hospitality | 2006 |
| Regis Group (Barclays Two) Limited | Real estate | 1999 |
| Regis Group (Barclays) Limited | Real estate | 1999 |
| Regis Group (Holdings) Limited | Professional & scientific | 2008 |
| Regis Group (Southern) Limited | Extraterritorial | 1999 |
| Regis Group (Thorpe Bay) Limited | Real estate | 1999 |
| Regis Group (UBK) Limited | Real estate | 1999 |
| Regis Group Holdings NO. 1 Limited | Professional & scientific | 2002 |
| Regis Group Services Limited | Real estate | 1999 |
| Regis Homes Limited | Real estate | 2015 |
| Regis Leisure Limited | Real estate | 2010 |
| Regis Retirement Living Limited | Real estate | 1999 |
| Regis Services Holdings Limited | Professional & scientific | 2002 |
| Regis USA Limited | Professional & scientific | 2011 |
| Rehub Studio Limited | Information & communication | 2026 |
| Reliance Events UK Ltd | Education | 2020 |
| Rell Cleaning Services Limited | Administrative & support | 2017 |
| Rellish Design Limited | Information & communication | 2015 |
| Relyon Financial Limited | Financial services | 2017 |
| Remarket Ltd | Wholesale & retail | 2025 |
| Remblance Holding Limited | Financial services | 2017 |
| Remblance Leisure Limited | Real estate | 2025 |
| Remblance Property Company Ltd | Real estate | 2016 |
| Remblance Property Company(Regional) Ltd | Real estate | 2016 |
| Remco Food Co Ltd | Wholesale & retail | 2021 |
| Remco Leisure Limited | Arts & recreation | 2005 |
| Remco Logistics Limited | Transport & logistics | 2019 |
| Remember the Heroes C.I.C. | Information & communication | 2020 |
| Renaissance Packaging Limited | Administrative & support | 2025 |
| Render Guard Limited | Construction | 2023 |
| Render Shield Ltd | Construction | 2023 |
| Renik Automotive UK Ltd. | Manufacturing | 2015 |
| Renovar Properties Limited | Real estate | 2022 |
| Repair & Maintenance Limited | Wholesale & retail | 2015 |
| Repowr Hydration Limited | Wholesale & retail | 2024 |
| Repton Court Management Limited | Real estate | 1989 |
| RER Construction Limited | Construction | 2019 |
| RES Tech Roofing Limited | Construction | 2017 |
| Resikom Solutions Limited | Construction | 2015 |
| Resource House Limited | Wholesale & retail | 2010 |
| Restan UK Ltd | Hospitality | 2023 |
| Retail Safers Limited | Transport & logistics | 1993 |
| Retailoak Ltd | Wholesale & retail | 2024 |
| Rettendon Car Wash Limited | Wholesale & retail | 2015 |
| Reversions (Long Term) Limited | Extraterritorial | 2015 |
| Reversions 2005 Limited | Real estate | 2005 |
| Revitalise Aesthetics Ltd | Other services | 2019 |
| Revive Aesthetics LAB Ltd | Other services | 2024 |
| Revo Design Limited | Professional & scientific | 1998 |
| Rewind Europe Ltd | Arts & recreation | 2020 |
| Rexy Creative Solutions Ltd | Information & communication | 2024 |
| Reycourts (Management) Limited | Households | 1986 |
| Reynolds Investments Limited | Financial services | 2014 |
| Reynolds Motor Group Ltd | Wholesale & retail | 2012 |
| Reynolds Motor Group Service Centre Ltd | Wholesale & retail | 2018 |
| RG Airspace Developments Limited | Real estate | 2004 |
| RG Capital Partners Limited | Real estate | 2010 |
| RG Freeholds (London) Limited | Real estate | 2009 |
| RG Residential Limited | Extraterritorial | 2000 |
| RG Reversionary Limited | Extraterritorial | 2015 |
| RG Reversions 2014 Limited | Real estate | 2005 |
| RG Securities (NO. 3) Limited | Real estate | 2010 |
| RG Securities (NO.2) Limited | Real estate | 1988 |
| RG Securities Limited | Real estate | 2008 |
| RG TDS Limited | Professional & scientific | 2024 |
| RGC Accountancy Services Ltd | Professional & scientific | 2006 |
| RGD Plumbing Ltd | Construction | 2022 |
| RGM Development Solutions Limited | Construction | 2026 |
| RGS Entertainments Ltd | Information & communication | 2025 |
| RH Agency Limited | Administrative & support | 2021 |
| RH Infra Limited | Information & communication | 2018 |
| RH Music Ltd | Wholesale & retail | 2024 |
| Rhiya Ltd | Wholesale & retail | 2017 |
| Ricereel Limited | Real estate | 1973 |
| Rich ROE CIC | Information & communication | 2024 |
| Rich ROE Records Ltd | Information & communication | 2024 |
| Richard Mcevoy Golf Academy Ltd | Education | 2024 |
| Richardson & Squibb Limited | Wholesale & retail | 2010 |
| Richard’S Bridge Ltd | Administrative & support | 2023 |
| Richj Consulting Ltd | Information & communication | 2025 |
| Richmond Manor Estates Limited | Real estate | 2023 |
| Rideout Films Limited | Information & communication | 2006 |
| Right Steps Recruitment Agency Ltd | Administrative & support | 2021 |
| Right Stones Properties Ltd | Real estate | 2024 |
| Rikki Cann (F.I.M.I) Limited | Wholesale & retail | 2002 |
| Rime Fire Sprinklers Ltd | Construction | 2023 |
| RIO Leisure Limited | Hospitality | 2013 |
| Rishan & Shayaan Properties Ltd | Real estate | 2026 |
| Rishi Accountants Ltd | Professional & scientific | 2021 |
| Riskbyte Group Ltd | Financial services | 2025 |
| Riskbyte Limited | Information & communication | 2026 |
| Riskbyte Systems Limited | Information & communication | 2025 |
| Riskmat Futures Limited | Financial services | 1998 |
| Rissington Management Company Limited | Households | 2012 |
| Ristorante Cucina Limited | Hospitality | 2013 |
| Ritzy Royale Ltd | Wholesale & retail | 2022 |