| Quest Agents Ltd | Wholesale & retail | 2020 |
| Queyholm Limited | Professional & scientific | 2025 |
| Quick Storage Ltd | Real estate | 2024 |
| Quicksave Blaby Limited | Wholesale & retail | 2023 |
| Quik Strip Ltd | Manufacturing | 2025 |
| Quinn & Co Wealth Management Ltd | Other services | 2018 |
| R & a Group Limited | Professional & scientific | 2008 |
| R & a Renewable Energy Limited | Construction | 2011 |
| R & a Systems (Scotland) Limited | Construction | 2008 |
| R & H Trust Co. (Bermuda) Limited | | 2023 |
| R & L Catering Ltd | Hospitality | 2014 |
| R Cars Leicester Ltd | Wholesale & retail | 2019 |
| R J M Toys & Games Limited | Professional & scientific | 2022 |
| R Major Consulting Ltd | Extraterritorial | 2013 |
| R Newton Services Ltd | Mining & quarrying | 2019 |
| R Stewart Joinery Ltd | Construction | 2015 |
| R&A Consulting Engineers Ltd | Professional & scientific | 2024 |
| R&A Electrical Services Ltd | Construction | 2005 |
| R&A Fire & Security Ltd | Manufacturing | 2021 |
| R&Db Shah Ltd | Real estate | 2023 |
| R&L Gyms Ltd | Arts & recreation | 2024 |
| R. Taylor & Sons (Transport) Limited | Transport & logistics | 2001 |
| R.F. Brown Holdings Limited | Financial services | 2020 |
| R.F. Brown Limited | Administrative & support | 1987 |
| R.J. Corp Limited | Professional & scientific | 2012 |
| R.P.L. Partnership Limited | Professional & scientific | 1992 |
| R.S. Coyle & SON Limited | Hospitality | 2013 |
| R.W.D. Limited | Real estate | 1991 |
| R20 Property Ltd | Real estate | 2020 |
| R555 Ltd | Construction | 2024 |
| Rach Properties Limited | Real estate | 2021 |
| Racing Eight Ltd | Professional & scientific | 2021 |
| Racing Management (Holdings) Ltd | Administrative & support | 2025 |
| Raellow Group Ltd | Real estate | 2023 |
| RAI Stores (Scotland) Limited | Wholesale & retail | 2016 |
| Railway Cost Management Limited | Professional & scientific | 2019 |
| Rajd Limited | Wholesale & retail | 2015 |
| Rajdeep Routh Psychiatry Services Ltd | Health & social care | 2018 |
| RAM Mortgage Solutions Ltd | Financial services | 2023 |
| RAM Safety Services Limited | Professional & scientific | 2023 |
| Ramharry Limited | Professional & scientific | 2022 |
| Rankin Joinery Services Ltd | Construction | 2021 |
| Rankine Properties Limited | Households | 2023 |
| Rapco (Bermuda) Ltd. | | 2023 |
| Rapid Drinks Limited | Manufacturing | 2025 |
| Rapid Rotary Tattoos Ltd | Other services | 2023 |
| Rapid TAN Group Limited | Professional & scientific | 2025 |
| Rapidtanuk Ltd | Wholesale & retail | 2025 |
| Rapier Energy Ltd. | Manufacturing | 2007 |
| RAR Ortho Ltd | Health & social care | 2021 |
| Rathmoy (Centurion House) Limited | | 2023 |
| Rathmoy (Chapel Street) Limited | | 2023 |
| Rathmoy (LP) Limited | | 2023 |
| Raymond Rossi Cleaning Services Ltd | Administrative & support | 2012 |
| Razor Barber Hamilton Ltd | Other services | 2026 |
| Razors Ranya Ltd | Other services | 2024 |
| RB Holdings (Scotland) Ltd | Real estate | 2024 |
| Rbmm Ltd | Hospitality | 2026 |
| Rbpb Properties Limited | Administrative & support | 2017 |
| RBS Electrical Engineering Limited | Manufacturing | 2011 |
| RC Video Content Limited | Administrative & support | 2024 |
| RCB Property Limited | Real estate | 2016 |
| Rcjd Renewables Ltd | Construction | 2024 |
| RCR Estates Ltd | Real estate | 2023 |
| RD Electrical 25 Ltd | Manufacturing | 2025 |
| Rdet Limited | Professional & scientific | 2024 |
| RDL Welding Inspections Limited | Manufacturing | 2014 |
| Real Optical Limited | Wholesale & retail | 2020 |
| Real Vets Limited | Professional & scientific | 2003 |
| Really Wild Displays Ltd | Arts & recreation | 2026 |
| Rebecca Menzies Racing Ltd | Arts & recreation | 2016 |
| Rebuild Glasgow Limited | Construction | 2025 |
| Rebus HR Group Limited | | 2000 |
| Recruitment Solutions Alba Ltd | Administrative & support | 2016 |
| Recyclenergy Limited | Other services | 2022 |
| Red 6 Installations Ltd | Construction | 2008 |
| Red Band Property Ltd | Real estate | 2021 |
| Red Square Rail Limited | Construction | 2018 |
| Red TIE Security Services Limited | Administrative & support | 2016 |
| Redbit Productions Limited | Information & communication | 2025 |
| Redenka Ltd | Other services | 2019 |
| Redline Investments Ltd | Real estate | 2017 |
| Redwood Marketing Limited | Professional & scientific | 2019 |
| Redzone Fitness and Personal Training Limited | Other services | 2021 |
| Reef Ltd | | 2023 |
| Reflections (Scotland) Ltd | Administrative & support | 2014 |
| Refresh Properties Scotland Ltd | Construction | 2024 |
| Regal Panipuri Ltd | Hospitality | 2025 |
| Regal Stores Ltd | Wholesale & retail | 2025 |
| Regal Sweet Mart Ltd | Wholesale & retail | 2024 |
| Regen Clothing Limited | Wholesale & retail | 2024 |
| Regus Properties Ltd | Real estate | 2022 |
| Reheat Leicester Ltd | Construction | 2018 |
| Reid of Paisley Ltd. | Real estate | 2007 |
| Reidburn Professional Services Ltd | Professional & scientific | 2026 |
| Reillys Ltd | Wholesale & retail | 2023 |
| Releaf Products Ltd | Wholesale & retail | 2015 |
| Relentless Fitness Ltd | Arts & recreation | 2024 |
| Relight GAS Limited | Construction | 2026 |
| Relyonuscleaning Ltd | Administrative & support | 2019 |