| Robert Smith Tsco Services Limited | Transport & logistics | 2013 |
| Robert Whiteley Ltd | Administrative & support | 2020 |
| Robert&Ileana Transport Ltd | Transport & logistics | 2025 |
| Robertcris Ltd | Transport & logistics | 2021 |
| Roberto Spedition Ltd | Transport & logistics | 2018 |
| Roberts Freight Limited | Transport & logistics | 2002 |
| Roberts Painting Contractors Ltd | Construction | 2024 |
| Robespierre Ltd | Hospitality | 2011 |
| Robin Hood Anlaby Road Limited | Hospitality | 2018 |
| Robin Hood Direct Limited | Information & communication | 2007 |
| Robin Hood Executive Cars Ltd | Transport & logistics | 2018 |
| Robin Hood Properties Limited | Construction | 2026 |
| Robinson Hornsby Holdings Limited | Real estate | 2021 |
| Robinson Hornsby Limited | Real estate | 2000 |
| Robinson Quant Capital Ltd | Information & communication | 2026 |
| Robinson Rowley Ltd | Mining & quarrying | 2021 |
| Robinson's Hair and Tanning Ltd | Other services | 2017 |
| Robinsons Bawtry Limited | Wholesale & retail | 2009 |
| Robmantrans Ltd | Transport & logistics | 2020 |
| Robson Morgan Ltd | Public administration | 2022 |
| Robsons Van & Truck Centre Limited | Administrative & support | 1996 |
| Robtrans Services Ltd | Transport & logistics | 2017 |
| Robyn Racheal Ltd | Health & social care | 2024 |
| Robyn RAY Homes Limited | Construction | 2025 |
| Rocabella Ltd | Wholesale & retail | 2024 |
| Rock Bottom (Doncaster) Limited | Construction | 2010 |
| Rock Drivers Ltd | Administrative & support | 2024 |
| Rock Express Ltd | Transport & logistics | 2021 |
| Rock House Residential Home Limited | Health & social care | 2003 |
| Rock of Ages Music Limited | Wholesale & retail | 2003 |
| Rockefeller Real Estate Ltd | Real estate | 2024 |
| Rockers Guitars Limited | Wholesale & retail | 2011 |
| Rocket Teacup Limited | Extraterritorial | 2026 |
| Rocketpanda Ltd | Extraterritorial | 2025 |
| Rockit and Patch Limited | Wholesale & retail | 2021 |
| Rockliffe Homes Limited | Real estate | 2015 |
| Rockpool Marketing Ltd | Administrative & support | 2024 |
| Rockstaff Ltd | Administrative & support | 2025 |
| Rockstock.Store Ltd | Wholesale & retail | 2021 |
| Rocky Mountain Phyto Essentials Ltd | Wholesale & retail | 2006 |
| ROD South Yorkshire Ltd | Water & waste | 2003 |
| Rodeo Europe Limited | Professional & scientific | 2011 |
| Roedale Systems Limited | Information & communication | 1991 |
| Roesons Associates Limited | Health & social care | 2006 |
| Roeville Computer Systems Limited | Administrative & support | 1997 |
| Roeville Tours Limited | Extraterritorial | 1993 |
| Roger.Waw. Ltd | Transport & logistics | 2025 |
| Rogers Haulage (Doncaster) Limited | Transport & logistics | 2002 |
| Rogue Scents Ltd | Wholesale & retail | 2026 |
| Rojac Renewables Ltd | Extraterritorial | 2017 |
| Rolec Electrical Services Ltd | Construction | 2019 |
| Rolec Energy Ltd | Construction | 2016 |
| Rolives Limited | Manufacturing | 2025 |
| Rolives Technologies Ltd | Information & communication | 2025 |
| Rolling in Roses Ltd | Wholesale & retail | 2018 |
| Rolls GUL Ltd | Hospitality | 2023 |
| ROM Car Services Limited | Wholesale & retail | 2018 |
| ROM Global Limited | Wholesale & retail | 2024 |
| Roman Hospitality Group Ltd | Hospitality | 2025 |
| Romania Mini Market Food&Drink Ltd | Wholesale & retail | 2022 |
| Romanian Food Market Ltd | Wholesale & retail | 2025 |
| Romanian Quality Builds Ltd | Construction | 2026 |
| Romanian Star Limited | Wholesale & retail | 2025 |
| Romaro Trans Limited | Transport & logistics | 2021 |
| Romix Construct Ltd | Construction | 2025 |
| Romsec Ltd | Construction | 2020 |
| Romulus Training Limited | Education | 2016 |
| Ronan R&D Ltd | Professional & scientific | 2025 |
| Ronarch Holdings Ltd | Financial services | 2022 |
| Ronca Services Limited | Professional & scientific | 2017 |
| Roobricks Ltd | Construction | 2025 |
| Roof Serve Ltd | Construction | 2020 |
| Roofrite Roofing Ltd | Construction | 2024 |
| Roofstrip Limited | Construction | 2004 |
| Rooms Investments Limited | Construction | 2021 |
| Roooms Ltd | Real estate | 2025 |
| Roosters Management Ltd | Financial services | 2025 |
| Rooted in Love Ltd | Wholesale & retail | 2023 |
| Roots & Rigour CIC | Professional & scientific | 2024 |
| Roots and Wings Group Ltd | Health & social care | 2025 |
| Rootseno Ltd | Information & communication | 2024 |
| Rooz Services Ltd | Manufacturing | 2025 |
| Roper & Co Ltd | Professional & scientific | 2019 |
| Ropetech Stay Rope Technical Services Limited | Professional & scientific | 2016 |
| Ropetech Wire Rope Technical Services Limited | Professional & scientific | 2009 |
| ROR Transport Ltd | Transport & logistics | 2024 |
| Rorr Consulting Limited | Professional & scientific | 2017 |
| Rosco Rail Ltd | Construction | 2019 |
| Rose Electrical Solutions Limited | Construction | 2022 |
| Rose Landscapes Ltd | Construction | 2014 |
| Rose Nails Doncaster Ltd | Other services | 2025 |
| Rose Park Care Limited | Health & social care | 2023 |
| Rose Renewable Solutions Limited | Construction | 2022 |
| Rosea Bridal Limited | Wholesale & retail | 2015 |
| Rosebery Accountancy Ltd | Professional & scientific | 2020 |
| Rosedale Abbey Hotel Limited | Hospitality | 2016 |
| Rosedene Investments Limited | Real estate | 1988 |
| Roselli Blue Ltd | Financial services | 2026 |
| Rosemark Interiors Ltd | Professional & scientific | 2025 |
| Rosemary & Thyme Home Interiors Limited | Professional & scientific | 2018 |