| Ro’S Fibre Limited | Information & communication | 2023 |
| RP Investments & Holdings Ltd | Financial services | 2023 |
| RP Meats Limited | Wholesale & retail | 2003 |
| RP Site Solutions Ltd | Construction | 2025 |
| RP Steel Services Ltd | Construction | 2023 |
| RPG Drivers Solution Ltd | Administrative & support | 2022 |
| RPM Innovation Ltd | Transport & logistics | 2013 |
| RPO Ltd | Health & social care | 2024 |
| RPV Construction Ltd | Construction | 2023 |
| RR Autogroup Ltd | Wholesale & retail | 2022 |
| RR Haulage Ltd | Transport & logistics | 2025 |
| RRL Commercials Ltd | Wholesale & retail | 2026 |
| Rromann Ltd | Transport & logistics | 2023 |
| RRS Autos Ltd | Wholesale & retail | 2017 |
| RS 360 Ltd | Real estate | 2018 |
| RS 4 Pro Development Ltd | Construction | 2016 |
| RS Air Conditioning Services Limited | Construction | 2008 |
| RS Auto Group Ltd | Wholesale & retail | 2025 |
| RS Clean Ltd | Administrative & support | 2022 |
| RS Fibre Solutions Ltd | Information & communication | 2023 |
| RS Grills & Cutlery Limited | Manufacturing | 2026 |
| RS Group Holdings Limited | Administrative & support | 2008 |
| RS North Holding Limited | Professional & scientific | 2024 |
| RS North Investment Limited | Real estate | 2024 |
| RS Optics Ltd | Health & social care | 2026 |
| RS Workshop Equipment Limited | Manufacturing | 2004 |
| RSA Business Services Ltd | Professional & scientific | 2026 |
| RSM Produce Limited | Wholesale & retail | 2008 |
| Rsmart Maintenance Ltd | Manufacturing | 2024 |
| Rsmsalon Limited | Other services | 2020 |
| RSS Truck Ltd | Transport & logistics | 2026 |
| RSX Transport Ltd | Transport & logistics | 2018 |
| RT Landscape Gardening Ltd | Professional & scientific | 2024 |
| RT Travel Limited | Administrative & support | 2017 |
| RT1 Investments Limited | Real estate | 2017 |
| RT74 Limited | Financial services | 2015 |
| RTC Groundcare Limited | Administrative & support | 2017 |
| RTC Plant Services Ltd | Wholesale & retail | 1996 |
| RTJ Active Auto Ltd | Wholesale & retail | 2025 |
| RTL Automotive Limited | Wholesale & retail | 2025 |
| RTW Construction Consultants Limited Ltd | Construction | 2017 |
| RTX Services Ltd | Construction | 2017 |
| Ruach Creative Ltd | Information & communication | 2010 |
| Rubin Eco Pump Services Ltd | Construction | 2026 |
| Rubitex Global Limited | Professional & scientific | 2020 |
| Ruby Care Solutions Ltd | Health & social care | 2020 |
| Ruby Rose Lettings Ltd | Real estate | 2019 |
| Ruby’S Nails Spa Ltd | Other services | 2026 |
| Ruckheat Limited | Construction | 2013 |
| RUD Trans Ltd | Transport & logistics | 2017 |
| Rudcook Limited | Hospitality | 2023 |
| Ruggiero Capital Management Ltd | Administrative & support | 2023 |
| Ruggiero Consulting Limited | Administrative & support | 2024 |
| Rumbles Pboro Ltd | Hospitality | 2025 |
| Runei Ltd | Health & social care | 2025 |
| Rupex Wallet Limited | Financial services | 2025 |
| Rural Designer Homes Limited | Construction | 2015 |
| Rural Homes Group Ltd | Construction | 2024 |
| Rusen Ltd | Construction | 2025 |
| Rushworth 2208 Ltd | Extraterritorial | 2012 |
| Russell and IVY Ltd | Administrative & support | 2026 |
| Russell Burgess Holdings Limited | Financial services | 2025 |
| Russell Burgess Limited | Agriculture & fishing | 1955 |
| Russell Dowers Ltd | Professional & scientific | 2024 |
| Russell Smith & Partners Limited | Administrative & support | 2020 |
| Russell Street Developments Limited | Construction | 2017 |
| Rustworks Ltd | Wholesale & retail | 2025 |
| Rusu Ltd | Administrative & support | 2025 |
| Ruthkay Limited | Agriculture & fishing | 1970 |
| Ruthra Retail Limited | Wholesale & retail | 2022 |
| Rutjay Limited | Information & communication | 2020 |
| Rutland Drainage Group Ltd | Water & waste | 2024 |
| Rutland Drainage Limited | Water & waste | 2020 |
| Rutland First CIC | Health & social care | 2014 |
| Rutland Furniture Sales Ltd | Wholesale & retail | 2023 |
| Rutland Hedging Limited | Administrative & support | 2022 |
| Ruware Group Limited | Agriculture & fishing | 2011 |
| Ruze Joinery Ltd | Construction | 2026 |
| RV Deliveries Ltd | Transport & logistics | 2019 |
| RV Self Drive Limited | Administrative & support | 2019 |
| RV Speedship Limited | Transport & logistics | 2025 |
| Rvks Ltd | Transport & logistics | 2017 |
| RW Car Care Ltd | Wholesale & retail | 2021 |
| RW Signs Ltd | Professional & scientific | 2026 |
| RWA Property Services Limited | Administrative & support | 2017 |
| Rwcrafts Limited | Wholesale & retail | 2022 |
| RWP Property Management Ltd | Real estate | 2014 |
| RWT (Peterborough) Limited | Arts & recreation | 2005 |
| RX Medico Limited | Wholesale & retail | 2013 |
| RXC Trans Ltd | Transport & logistics | 2025 |
| Rxuby’S Ltd | Health & social care | 2019 |
| Ryan Broughton Coaching Ltd | Arts & recreation | 2025 |
| Ryan Edmunds Ltd | Wholesale & retail | 2022 |
| Ryan F & M Ltd | Wholesale & retail | 2026 |
| Rydal Communications Ltd | Wholesale & retail | 2008 |
| Rydal Group Holdings Ltd | Financial services | 2024 |
| Rydal Security Ltd | Wholesale & retail | 2016 |
| Rydal Utilities Limited | Wholesale & retail | 2016 |
| Rydal Wholesale Ltd | Professional & scientific | 1997 |
| Ryno Music Ltd | Information & communication | 2020 |