| R W M Kaye and Company Limited | Professional & scientific | 2015 |
| R&C Lintern Limited | Financial services | 2026 |
| R&J Fellows-Patel Limited | Households | 2019 |
| R.A.Y Management Company Ltd | Households | 2013 |
| R.H. Drew Limited | Real estate | 1937 |
| R.I.M.S.Properties Limited | Real estate | 1963 |
| R.J. Mitchell and SON Limited | Construction | 2003 |
| R.P. (Eugenie) Ltd | Real estate | 1992 |
| R4T Solutions Limited | Professional & scientific | 2023 |
| Raafay and Basit Limited | Hospitality | 2019 |
| Raby Gardens Limited | Households | 2008 |
| Raby Growth Ltd | Professional & scientific | 2025 |
| Raceahead Event Services Limited | Arts & recreation | 2016 |
| Racehorse Farriery Limited | Agriculture & fishing | 2012 |
| Rachel Willis Ltd | Other services | 2023 |
| Racquet Garden Limited | Arts & recreation | 2025 |
| Racquetup Ltd | Arts & recreation | 2026 |
| Radco Country Style Limited | Extraterritorial | 1984 |
| Radians Management Limited | Professional & scientific | 2017 |
| Radical Ritual Ltd | Arts & recreation | 2024 |
| Radife Ltd | Wholesale & retail | 2010 |
| Radio Bath Ltd | Information & communication | 2020 |
| Radio Design (UK) Limited | Information & communication | 2007 |
| Radway Environmental Consulting Limited | Professional & scientific | 2026 |
| RAE Solutions Limited | Professional & scientific | 2012 |
| Raftaar Retail Limited | Wholesale & retail | 2023 |
| Rafzol Ltd | Transport & logistics | 2018 |
| Ragged Hare Ltd | Information & communication | 2022 |
| Raggle Taggle Publishing Limited | Information & communication | 2010 |
| Raging Bath Ltd | Other services | 2025 |
| RAI Rental Holdings LLP | | 2025 |
| Rainbow Strategy and Management Ltd | Administrative & support | 2012 |
| Rainbow Wood Ltd | Hospitality | 2021 |
| Raincheck Bath Limited | Hospitality | 2021 |
| Raise Consulting Ltd | Administrative & support | 2023 |
| Raising Confident Adults Ltd | Education | 2016 |
| Rakvel Limited | Information & communication | 2018 |
| Raldermay Limited | Households | 1978 |
| Raleys Management Co Limited | Households | 2019 |
| Ralph Allen Management Company (Bath) Limited | Households | 1984 |
| Ralphs Ruin Ltd | Manufacturing | 2016 |
| Ramm Care Group Ltd | Administrative & support | 2013 |
| Ramsay Flat Ltd | Hospitality | 2023 |
| Ramshacklicious Limited | Arts & recreation | 2021 |
| Randy's Bikes Ltd | Wholesale & retail | 2014 |
| Raphael & Co Limited | Arts & recreation | 2012 |
| Raphael Restaurants Ltd | Hospitality | 2001 |
| Rarbla World Finance Ltd | Financial services | 2024 |
| Raregift Limited | Manufacturing | 1989 |
| Rascals Publishing and Media Ltd | Information & communication | 2020 |
| Raspberry Books Ltd | Information & communication | 2018 |
| Rathbone HR Solutions Limited | Professional & scientific | 2020 |
| Rathbourne Limited | Professional & scientific | 2013 |
| Rats Tales Limited | Information & communication | 2016 |
| Rava Design Limited | Construction | 2024 |
| Raven Consulting Solutions Ltd | Professional & scientific | 2023 |
| Ravens Fall Ltd | Financial services | 2025 |
| RAW! Sales & Marketing Ltd | Professional & scientific | 2022 |
| Rawrville Limited | Information & communication | 2025 |
| RAY Services Limited | Transport & logistics | 2004 |
| Raytest Holdings Limited | Financial services | 2024 |
| Raytest Instruments Limited | Professional & scientific | 1980 |
| Razor FC Ltd | Arts & recreation | 2022 |
| RB1007 LLP | | 2012 |
| Rccs Consulting Limited | Information & communication | 2017 |
| RCL Developments Limited | Construction | 2021 |
| RCL Holdings Limited | Financial services | 2024 |
| RCL House Management Limited | Real estate | 2024 |
| RD Engineered Solutions Limited | Professional & scientific | 2023 |
| RD Investments Holdings Ltd | Real estate | 2021 |
| Re:Create Capital Limited | Other services | 2025 |
| Re:Create Properties Limited | Real estate | 2019 |
| Readam Holdings UK Limited | Financial services | 2015 |
| Readam UK (PTY) Ltd | Hospitality | 2013 |
| Real Chef Recruitment Ltd | Administrative & support | 2022 |
| Real Solutions Consulting Limited | Administrative & support | 2013 |
| Real World Therapy Ltd | Health & social care | 2024 |
| Realityhouse Limited | Information & communication | 2003 |
| Realmachines AI Ltd | Information & communication | 2024 |
| Realty Training Limited | Professional & scientific | 2011 |
| Reboot Results Limited | Hospitality | 2024 |
| Rebuild Leaders Ltd | Health & social care | 2023 |
| RECONN3CT C.I.C. | Professional & scientific | 2022 |
| Rectat Ltd | Information & communication | 2024 |
| Red Bishop Media Limited | Professional & scientific | 2023 |
| Red Box Global Limited | Information & communication | 2018 |
| Red Central Entertainment Ltd | Administrative & support | 2009 |
| Red Central Holding Limited | Financial services | 2008 |
| Red Central Limited | Arts & recreation | 2001 |
| Red Chimp Investments Limited | Real estate | 2021 |
| Red Gables (Trowbridge) Limited | Households | 2019 |
| Red Lion Vehicles Ltd | Wholesale & retail | 2022 |
| Red OWL IT Limited | Information & communication | 2005 |
| Red Robot Digital Ltd. | Information & communication | 2007 |
| Red Rocko Limited | Wholesale & retail | 2015 |
| Red Rose Management Limited | Real estate | 2025 |
| Red Sugar (Bristol) Limited | Wholesale & retail | 2015 |
| Red Team Strategy Limited | Professional & scientific | 2025 |
| Red Zone Analysis Ltd | Information & communication | 2020 |
| Redbean Management Limited | Professional & scientific | 2012 |