| Riccall Renewables Limited | Energy | 2024 |
| Richard Baxter Consultancy Ltd | Professional & scientific | 2017 |
| Richard Beaumont Design Ltd | Professional & scientific | 2023 |
| Richard J Williams Limited | Health & social care | 2005 |
| Richard Noyau Consulting Ltd | Information & communication | 2025 |
| Richjohn Estates Ltd | Administrative & support | 2021 |
| Richmond Bridge Advisors Limited | Information & communication | 2020 |
| Richstier Limited | Professional & scientific | 2018 |
| Rickford Consulting Limited | Professional & scientific | 2024 |
| Rictus Grin Games Ltd. | Information & communication | 2023 |
| Ridge Road Energy Limited | Energy | 2015 |
| Ridgewood Farm Residents Limited | Real estate | 2016 |
| Rinnara Ltd | Wholesale & retail | 2021 |
| Riosca Limited | Information & communication | 2012 |
| Ripley Building Contractors Ltd | Construction | 2026 |
| Risario Limited | Real estate | 2009 |
| Rise Alternative Provision Limited | Education | 2023 |
| Rising Group Ltd | Construction | 2024 |
| Risktrace Limited | Information & communication | 2023 |
| Riskunlimited Ltd | Administrative & support | 2017 |
| Risn Properties Ltd | Real estate | 2022 |
| Rison AI (P) Limited | Information & communication | 2026 |
| River Tillingbourne Spirit Company Limited | Manufacturing | 2022 |
| Rivermount Residents Association Limited | Households | 1976 |
| Riverside (Guildford) Management Limited | Households | 1995 |
| Riverside Care Group Ltd | Health & social care | 2025 |
| Riverside Fish Bar Guildford Ltd | Hospitality | 2020 |
| Riverside Media Ltd | Administrative & support | 2018 |
| Riverside Millbrook Limited | Households | 2004 |
| Rjgam Limited | Professional & scientific | 2023 |
| Rjpe Limited | Construction | 2012 |
| RK Caledon Limited | Construction | 2017 |
| RK Sports Media Ltd | Professional & scientific | 2024 |
| RKP Optics Ltd | Health & social care | 2025 |
| Rlen Limited | Financial services | 2022 |
| Rlgeon Limited | Professional & scientific | 2011 |
| RM Marketing Ltd | Wholesale & retail | 2005 |
| RMC Design Studio Limited | Professional & scientific | 2013 |
| RMG Ltd. | Financial services | 2020 |
| Roadkill Restorations Limited | Wholesale & retail | 2025 |
| Roadloop Ltd | Information & communication | 2026 |
| Roar Betting UK Limited | Arts & recreation | 2006 |
| Robbie Brown Consultancy Limited | Professional & scientific | 2025 |
| Robert Elliston Architects Limited | Professional & scientific | 1996 |
| Robinson's Plumbing, Heating & GAS (South East) Ltd | Construction | 2019 |
| Robinville UK PVT Limited | Information & communication | 2010 |
| Robur Limited | Information & communication | 1982 |
| Rochard King Limited | Real estate | 2015 |
| Rochester CS Ltd | Professional & scientific | 2018 |
| Rock Solid Property Services Limited | Construction | 2018 |
| Rocka Electrical Ltd | Construction | 2024 |
| Rocket DC Limited | Administrative & support | 2011 |
| Rocketdesk Guildford Limited | Real estate | 2017 |
| Rocklore Exploration Services Limited | Mining & quarrying | 2010 |
| Rockvolt Limited | Professional & scientific | 2017 |
| Rogers Farm Management Company Ltd | Households | 2023 |
| Rogerwilco Limited | Administrative & support | 2019 |
| Rojafi | Administrative & support | 2018 |
| Roke House (Freehold) Limited | Households | 2025 |
| Roke House Management Limited | Households | 1972 |
| Rokers (Little Angels) Play World Limited | Arts & recreation | 1999 |
| Rokers Holdings Limited | Financial services | 2021 |
| Rokers Limited | Wholesale & retail | 2010 |
| Roland Dowell Limited | Administrative & support | 2001 |
| Rolica Ltd | Financial services | 2025 |
| Roliver Ltd | Transport & logistics | 2025 |
| Roll Bar Consulting Ltd | Professional & scientific | 2026 |
| Rolton Kilbride Hams Hall Limited | Professional & scientific | 2016 |
| Rolton Kilbride Northampton Limited | Professional & scientific | 2016 |
| Rolton Kilbride Rotherham Limited | Professional & scientific | 2016 |
| ROM Fish & Chips Ltd | Hospitality | 2021 |
| Romdox U.K. Ltd | Real estate | 2018 |
| RON Carter Limited | Professional & scientific | 2006 |
| Rondo Wines LLP | | 2016 |
| Ronins Group Limited | Information & communication | 2021 |
| Rookwood Court (Residents Association) Limited | Households | 1982 |
| Rooster Snowboarding Limited | Wholesale & retail | 2014 |
| ROS & Co LLP | | 2011 |
| Roscarrock Ltd | Financial services | 2025 |
| Rosemary Soton Limited | Hospitality | 2026 |
| Roseward Trading Limited | Construction | 2002 |
| Rossdales Neurocare Limited | Health & social care | 2016 |
| Rostrevor Maintenance Limited | Households | 1961 |
| Rosvit Investment Ltd | Extraterritorial | 2018 |
| Roteq Consultants Limited | Professional & scientific | 2026 |
| Rotherbank Residential Care Home Limited | Health & social care | 2010 |
| Rothschild Construction Limited | Construction | 2022 |
| Roughover Limited | Real estate | 2020 |
| Round Down Residents Garden Company Limited | Households | 2003 |
| Round Table Game Cafe Ltd | Wholesale & retail | 2026 |
| Roundwood Biomass Solutions Limited | Wholesale & retail | 2022 |
| Rovika Sports Limited | Manufacturing | 2024 |
| Rovikore Limited | Information & communication | 2026 |
| Rowan House (Stoke Square) Limited | Real estate | 2004 |
| Rowan Stevenson Limited | Information & communication | 2011 |
| Royal Grammar School Guildford | Education | 2017 |
| Royalton Estates Limited | Administrative & support | 2007 |
| Roy’S Wines Ltd | Wholesale & retail | 2024 |
| RPS Drainage Services Limited | Water & waste | 2002 |
| RSB Medical Services Ltd | Administrative & support | 2017 |