| Retail Funding Limited | Administrative & support | 2015 |
| Reuthe's Events Ltd | Hospitality | 2018 |
| Revel Dental Limited | Health & social care | 2022 |
| Reviere Revitalise Ltd | Wholesale & retail | 2025 |
| Revision Solutions Limited | Construction | 2023 |
| Revival Nutrition Limited | Wholesale & retail | 2018 |
| Revtenseven Ltd | Administrative & support | 2013 |
| Rexline Limited | Transport & logistics | 2017 |
| Reyan Private Limited | Wholesale & retail | 2024 |
| Reynolds Farmers Limited | Agriculture & fishing | 1955 |
| Reynolds Precision Ltd | Professional & scientific | 2013 |
| RF376 Logistics Ltd | Transport & logistics | 2026 |
| RFP Residential Improvements Ltd | Construction | 2026 |
| RFT Productions Ltd | Arts & recreation | 2020 |
| RG Brickwork Services Ltd | Construction | 2023 |
| RG Comms Ltd | Information & communication | 2023 |
| RG Engineering Limited | Wholesale & retail | 2011 |
| RG Safety Solutions Ltd | Professional & scientific | 2024 |
| RG Solid Craft Solutions Ltd | Construction | 2025 |
| RGB Investment Holdings Ltd | Financial services | 2021 |
| Rgnz Ltd | Health & social care | 2023 |
| RGS Innovation and Technology Ltd | Manufacturing | 2023 |
| RGS Motorbikes Ltd | Wholesale & retail | 2016 |
| RGS Motorsport Dyno Centre Ltd | Wholesale & retail | 2019 |
| RGS Motorsport Ltd | Wholesale & retail | 2018 |
| RGV Limited | Transport & logistics | 2016 |
| RH Weldfab Ltd | Manufacturing | 2020 |
| Rhapsody Productions Ltd | Arts & recreation | 2026 |
| Rhino Surface Solutions Ltd | Construction | 2013 |
| Rhinovating Limited | Manufacturing | 2023 |
| Rhydans Limited | Real estate | 2016 |
| Rhythm & Roof Property Group Ltd | Construction | 2026 |
| Rhythm and Mind CIC | Health & social care | 2026 |
| Richard Gent,Limited | Manufacturing | 1947 |
| Richworth Supplies Ltd | Administrative & support | 2017 |
| Ridedealers Ltd | Wholesale & retail | 2023 |
| RIF Group Limited | Professional & scientific | 2023 |
| Right Data Limited | Information & communication | 2010 |
| Right Mortgage Services Ltd | Financial services | 2016 |
| Rijnoveanu Ltd | Transport & logistics | 2026 |
| Risai Ltd | Wholesale & retail | 2020 |
| Rise Scaffolding Solutions Ltd | Construction | 2023 |
| Riseley Stores Ltd | Wholesale & retail | 2020 |
| Riser Money Transfer Ltd | Financial services | 2026 |
| Risk Fluent Limited | Information & communication | 2019 |
| Riteville Property Limited | Real estate | 2021 |
| RJ Capital Works Ltd | Construction | 2025 |
| RJ Projects (Mids) Ltd | Construction | 2025 |
| Rjhj Limited | Real estate | 2017 |
| RK Moto Ltd | Wholesale & retail | 2015 |
| RL Asandei Limited | Wholesale & retail | 2019 |
| RLB Bennett Ltd | Wholesale & retail | 2024 |
| RLH Training and Consultancy Ltd | Professional & scientific | 2023 |
| Rls&Lt Limited | Transport & logistics | 2020 |
| RM Driving School Limited | Education | 2025 |
| Rmember Ltd | Wholesale & retail | 2025 |
| RMG Worldwide Limited | Arts & recreation | 2024 |
| RML Group Holdings Limited | Financial services | 2024 |
| RML Group Limited | Manufacturing | 1984 |
| RML Motorsport Limited | Manufacturing | 1988 |
| Rmluk Limited | Financial services | 2019 |
| RMT Healthcare Limited | Health & social care | 2014 |
| RMT Passive Fire Protection Ltd | Construction | 2025 |
| Rnbw Holdings Ltd | Real estate | 2025 |
| Rnduk Ltd | Transport & logistics | 2018 |
| Rnduk Sameday Ltd | Transport & logistics | 2025 |
| RNS Auto Group Ltd | Wholesale & retail | 2023 |
| RO Logistic Ltd | Transport & logistics | 2018 |
| Roadeeze Express Limited | Transport & logistics | 2024 |
| ROB Foreman Agricultural Engineers Limited | Manufacturing | 2003 |
| Robert Farrow Ltd | Construction | 2014 |
| Robert Wilkinson Investments Limited | Financial services | 2003 |
| Robert York Limited | Construction | 2015 |
| Roberts Close (Eaton Socon) Management Company Limited | Real estate | 1998 |
| Robi Roti Ltd | Transport & logistics | 2021 |
| Robinson Manufacturing (Holdings) Limited | Professional & scientific | 2015 |
| Robotix Automation Limited | Manufacturing | 2023 |
| Robson Haulage Ltd | Transport & logistics | 2017 |
| Roby's Enterprises Limited | Construction | 2021 |
| ROC Energy Limited | Manufacturing | 2002 |
| ROC Maintenance Services Limited | Professional & scientific | 2013 |
| Roche Consultants Ltd | Administrative & support | 2026 |
| Roche Roofing Solutions Ltd | Construction | 2025 |
| Roche Scaffolding Ltd | Construction | 2026 |
| Rock UK Adventure Centres Limited | Hospitality | 2003 |
| Rocketforce Limited | Construction | 1997 |
| Rockpro Limited | Hospitality | 2021 |
| Rocky Trans Ltd | Administrative & support | 2017 |
| Rode Haulage Services (UK) Ltd | Transport & logistics | 2012 |
| Rogalik Midlands Ltd | Wholesale & retail | 2019 |
| Roger & Amanda Denton Ltd | Real estate | 2013 |
| Roger K Gardening Ltd | Construction | 2017 |
| Rogers Electrical & Maintenance Ltd | Construction | 2022 |
| Rogers Race Engines Ltd | Wholesale & retail | 2023 |
| Rogers Town and Country Estate Agents Ltd | Real estate | 2022 |
| ROL Investment Limited | Real estate | 2019 |
| Roll -Tech Mobile Shot Blasting Services Ltd | Construction | 2017 |
| Roll-Collectibles Ltd | Wholesale & retail | 2025 |
| Roll-Tech Services Ltd | Construction | 2017 |
| Rolly, Your Sparky Ltd | Construction | 2023 |