| Red Tree Developments Limited | Construction | 2018 |
| Redsky Bikes Ltd | Wholesale & retail | 2022 |
| Redwood Capital Propco Ltd | Real estate | 2021 |
| Reel Events Limited | Information & communication | 2021 |
| Reel Film Media Limited | Information & communication | 2015 |
| Reel Media Group Limited | Information & communication | 2021 |
| Reesoh Investments | Financial services | 2020 |
| Regan Mechanical Services Ltd | Construction | 2021 |
| Regan Property Group Ltd | Real estate | 2025 |
| Regent Property Group Limited | Extraterritorial | 2016 |
| Regionale Ltd | Financial services | 2020 |
| Reign Homes ( Yorkshire ) Ltd | Construction | 2025 |
| REM Textiles Limited | Manufacturing | 2016 |
| Rent GAP Capital Limited | Real estate | 2023 |
| Residential Capital Limited | Financial services | 2013 |
| Residual Anomaly Limited | Mining & quarrying | 2025 |
| Restaurant L'Aquila Limited | Hospitality | 2018 |
| Retail Music Media Ltd | Information & communication | 2013 |
| Retail Response Limited | Information & communication | 2004 |
| Retirement Planning and Mortgages Limited | Financial services | 2020 |
| Retro Automotive Limited | Wholesale & retail | 2018 |
| Retro Defenders Limited | Extraterritorial | 2020 |
| Revans Rental Properties Limited | Real estate | 2024 |
| Revelfree Limited | Professional & scientific | 1993 |
| Revival Building Products Ltd | Wholesale & retail | 2012 |
| Revolease UK Limited | Wholesale & retail | 2025 |
| REX Beers Limited | Hospitality | 2025 |
| Richard Blackburn Consulting Ltd | Professional & scientific | 2024 |
| Richard Harrison Limited | Health & social care | 2001 |
| Richard Roberts (Huby 1) Ltd | Real estate | 2024 |
| Richard Roberts (SPV1) Ltd | Real estate | 2024 |
| Richard Roberts (SPV2) Ltd | Real estate | 2024 |
| Richard Roberts Ltd | Construction | 2017 |
| Richard Wilson Ecology Limited | Professional & scientific | 2018 |
| Ridehq Limited | Wholesale & retail | 2025 |
| Ridge Employee Relations Limited | Professional & scientific | 2013 |
| Ridings Mobility Limited | Arts & recreation | 2014 |
| Rightchapter Limited | Real estate | 2010 |
| Rigton Gardens (Bardsey) Management Company Limited | Extraterritorial | 2014 |
| Rigton Print Limited | Administrative & support | 2001 |
| Rila Marketing Company Ltd. | Real estate | 1998 |
| Ring Protect Limited | Wholesale & retail | 2025 |
| RIO AI (UK) Limited | Professional & scientific | 2009 |
| RIO AI Limited | Information & communication | 1997 |
| Ripple Investment Group Limited | Real estate | 2018 |
| Rishworth Property Services Limited | Real estate | 1978 |
| River & Wren Limited | Manufacturing | 2023 |
| Riverside Road Residents Management Company Limited | Households | 2020 |
| Riverside Village Ripon Management Company Limited | Households | 1992 |
| RJ MC Services Limited | Professional & scientific | 2018 |
| RJA Management Services Limited | Professional & scientific | 2019 |
| RJC 5 Limited | Administrative & support | 2025 |
| Rjmc Holdings Limited | Real estate | 2023 |
| RMB Brand Consultancy & Creative Services Limited | Professional & scientific | 2020 |
| Roam Health Ltd | Information & communication | 2025 |
| Robeck Investments | Financial services | 2014 |
| Robert Manning Limited | Real estate | 2014 |
| Robert Press Consultancy Limited | Professional & scientific | 2022 |
| Roberts Motor Engineers Ltd | Wholesale & retail | 2022 |
| Roberts-Harry Property Developments Ltd | Real estate | 2018 |
| Robin Renewables Ltd | Construction | 2023 |
| Roll Over Productions Limited | Extraterritorial | 2015 |
| ROOM2LIVE.COM Limited | Real estate | 2012 |
| Rose & Crown (the Village) Ltd | Hospitality | 2016 |
| Rose Anaesthesia Consulting Limited | Health & social care | 2019 |
| Rose Mortgages Partnership LLP | | 2024 |
| Rosia Limited | Professional & scientific | 2012 |
| Rothstone Estates (Holdings) Limited | Financial services | 2025 |
| Rothstone Estates Ltd | Construction | 2009 |
| RPS Lifts and Electrical Ltd | Construction | 2020 |
| RRG Associates Limited | Professional & scientific | 2013 |
| RS Global Consulting Ltd | Professional & scientific | 2025 |
| RS Wealth Advisory Ltd | Financial services | 2020 |
| RSW Advisory LLP | | 2015 |
| RT Research Ltd | Wholesale & retail | 2015 |
| Rubble Industries Limited | Financial services | 2025 |
| Rubus Assets Ltd | Real estate | 2026 |
| Ruddy Hell (Scape) Ltd | Hospitality | 2026 |
| Rudgate Court (Management) Company Limited | Real estate | 2004 |
| Ruffnek Limited | Wholesale & retail | 2019 |
| Ruler IT Limited | Information & communication | 2014 |
| Rural Prize Draws Limited | Arts & recreation | 2024 |
| RWB Estimating Services Limited | Professional & scientific | 2010 |
| Ryan Libbey Media Limited | Professional & scientific | 2019 |
| RZB Creative Limited | Professional & scientific | 2025 |
| S & H Wellard Property Limited | Real estate | 2025 |
| S & W Building Services Limited | Construction | 2006 |
| S C Wood Works Limited | Manufacturing | 2017 |
| S. Fearn Plumbing & Heating Ltd | Construction | 2016 |
| S.M. Foster Associates Limited | Professional & scientific | 1997 |
| S.M.T.J. Properties Limited | Real estate | 2026 |
| S.Taylor Logistics Consulting Ltd | Professional & scientific | 2018 |
| S2C Plus Limited | Information & communication | 2018 |
| S40 Group Ltd | Arts & recreation | 2020 |
| SAC Vintage Ltd | Wholesale & retail | 2024 |
| Saeedeh's Art and Craft Ltd | Wholesale & retail | 2024 |
| Safe Payroll Limited | Hospitality | 2014 |
| Safe Stocks Limited | Hospitality | 2016 |
| Safegas Limited | Construction | 1995 |
| Safeguard Safety and Management Center Limited | Professional & scientific | 2025 |