| Renewable Power Systems (Dargan Road) Limited | Energy | 2008 |
| Renewable Power Systems (India) Limited | Extraterritorial | 2005 |
| Renewable Power Systems (NI) Limited | Energy | 2008 |
| Renewable Power Systems Holdings Limited | Extraterritorial | 2008 |
| Renewable Power Systems Limited | Professional & scientific | 1991 |
| Renny Court Management Limited | Households | 2020 |
| Reno (Bedford) Limited | Transport & logistics | 2017 |
| Reno Building Services Ltd | Construction | 2026 |
| RENOV8 Homes Construction Limited | Construction | 2025 |
| Renpride Investments Limited | Real estate | 1964 |
| Rent Properties Ltd | Real estate | 2017 |
| Renting Static Homes MK Ltd | Real estate | 2025 |
| Renume Wellness Ltd | Health & social care | 2024 |
| Renuve Ltd | Administrative & support | 2026 |
| Renvi Ltd | Construction | 2026 |
| Repeat Pack Ltd | Wholesale & retail | 2024 |
| Repport Limited | Professional & scientific | 2025 |
| Reputitan Risk Management Ltd | Financial services | 2024 |
| Research & Medical Services Limited | Manufacturing | 1999 |
| Resicom Management Limited | Administrative & support | 2025 |
| Residential Development Limited | Real estate | 2005 |
| Residential Property Consultancy Limited | Administrative & support | 2016 |
| Resolent Ltd | Real estate | 2014 |
| Resolute Roofing Ltd | Construction | 2024 |
| Resonance Business Solutions Limited | Transport & logistics | 2015 |
| Resortwear Limited | Wholesale & retail | 2026 |
| Resovate Hospitality Asset Management LLP | | 2025 |
| Respirational Ltd | Education | 2020 |
| Restoration Cake Ltd | Hospitality | 2009 |
| Restoration Revival Fellowship Apostolic Ministry Bedford | Other services | 2015 |
| Restore Technology Limited | Water & waste | 2001 |
| Restyle Automotive Ltd | Wholesale & retail | 2025 |
| Result Strategic Marketing Limited | Professional & scientific | 1997 |
| Retavia Limited | Transport & logistics | 2011 |
| Rethabile Limited | Health & social care | 2026 |
| Reusefully Limited | Professional & scientific | 2008 |
| REV1VE Ltd | Health & social care | 2024 |
| Revak Limited | Administrative & support | 2018 |
| REVELATION-22 Ltd | Wholesale & retail | 2023 |
| Revelop Trading Limited | Manufacturing | 2013 |
| Reverence Roofing Ltd | Construction | 2025 |
| Revista Brasil ETC Limited | Information & communication | 2012 |
| Revival Housing Ltd | Health & social care | 2026 |
| Revival MMA Ltd | Other services | 2023 |
| Reynards Properties Limited | Real estate | 2013 |
| Reyneaura Ltd | Wholesale & retail | 2025 |
| Reynolds Estate and Letting Agents Ltd | Real estate | 2022 |
| Reynolds Mortgage Services Ltd | Financial services | 2014 |
| Reyridge Limited | Extraterritorial | 2019 |
| Rezcon Consulting Ltd | Information & communication | 2016 |
| RF Motors Limited | Wholesale & retail | 2023 |
| RF Software Ltd | Information & communication | 2025 |
| RFL Building Services Ltd | Construction | 2018 |
| RG & MJ Properties Ltd | Wholesale & retail | 2016 |
| RG Media Group Ltd | Professional & scientific | 2024 |
| RGD Accountancy Services Ltd | Professional & scientific | 2022 |
| RGL Developments Limited | Construction | 2025 |
| RGL Property Limited | Real estate | 2021 |
| RGS Building Contractor Ltd | Construction | 2024 |
| RGW Digital Services Ltd | Information & communication | 2016 |
| RHC Pharma Group Limited | Wholesale & retail | 2019 |
| Rhemzim Ltd | Health & social care | 2020 |
| Rhino Coaching Ltd | Education | 2026 |
| Rhostat Limited | Information & communication | 2013 |
| RHR Consultancy Ltd | Administrative & support | 2020 |
| RHS Cars Ltd | Wholesale & retail | 2019 |
| RIA Mart Ltd | Wholesale & retail | 2017 |
| Ria-Jaine & Co Limited | Professional & scientific | 2018 |
| RIC Business Ltd | Transport & logistics | 2017 |
| Richard A.J. Graham Plumbing and Heating Limited | Construction | 2008 |
| Richard Gansbuehler Limited | Construction | 2004 |
| Richard Ielden Motor Services Ltd | Wholesale & retail | 2016 |
| Richard Tuft Productions Ltd | Arts & recreation | 2021 |
| Richardson Vehicle Logistics Ltd | Administrative & support | 2025 |
| Richcasual Limited | Hospitality | 1995 |
| Riches Motorsport & Projects Limited | Other services | 2022 |
| Richlit Products & Services Ltd | Hospitality | 2022 |
| Richly Thai Limited | Hospitality | 2023 |
| Richpark Retail Ltd | Wholesale & retail | 2020 |
| Rich’S Custom Fabrications Ltd | Manufacturing | 2026 |
| Rickard Residences Ltd | Real estate | 2019 |
| Ricoliav Care Ltd | Health & social care | 2019 |
| Ricton Consulting Ltd | Other services | 2025 |
| Ride Again Ltd | Professional & scientific | 2023 |
| Ride Effect Ltd | Wholesale & retail | 2021 |
| Ride UK 365 Ltd | Transport & logistics | 2024 |
| Rideau West Ltd | Wholesale & retail | 2012 |
| Ridgmont Classics Limited | Administrative & support | 2016 |
| Ridhima Properties Ltd | Real estate | 2026 |
| Riebe Property Rents Ltd | Real estate | 2025 |
| Riffa Security Services (UK) Ltd | Administrative & support | 2023 |
| Riffe Ltd | Wholesale & retail | 2024 |
| Riffsnthings Ltd | Wholesale & retail | 2025 |
| Rigging Town Limited | Manufacturing | 2013 |
| Rigging Village Limited | Arts & recreation | 2023 |
| Right Accountancy Services Limited | Professional & scientific | 2013 |
| Right Cyber UK Limited | Information & communication | 2026 |
| Rijobi PM Limited | Information & communication | 2016 |
| Riken Consultancy Ltd | Health & social care | 2016 |
| Riley Services Management Limited | Other services | 2016 |