| Rubina Luna LP | | 2021 |
| Rubinex Trade LP | | 2020 |
| Rubis Alliance LP | | 2015 |
| Rubislaw Property Company Limited | Construction | 1999 |
| Rubiyar LP | | 2003 |
| Rubric Aviation Limited | Transport & logistics | 2021 |
| Rubric EOT Limited | Extraterritorial | 2022 |
| Rubric Europe Limited | Professional & scientific | 2014 |
| Rubric Limited | Professional & scientific | 2014 |
| Rubster Consulting Limited | Professional & scientific | 2025 |
| Rubus Global LP | | 2017 |
| Rubus Global LP | | 2017 |
| Rubus Group Holdings LP | | 2018 |
| Rubus Group LP | | 2017 |
| Ruby Aesthetics Scotland Ltd | Health & social care | 2022 |
| Ruby Alba Limited | Wholesale & retail | 2026 |
| Ruby Computing Consultants Ltd | Information & communication | 2019 |
| Ruby Home & Garden Solutions Limited | Construction | 2024 |
| Ruby Land Ltd | Real estate | 2023 |
| Ruby Letair Property Development Ltd | Real estate | 2018 |
| Ruby Management LP | | 2014 |
| Ruby Organisation L.P. | | 2010 |
| Ruby Property and Developments Ltd | Real estate | 2024 |
| Ruby Rouge LLP | | 2012 |
| Ruby Stilettos Property Ltd | Real estate | 2025 |
| Ruby Studios Ltd | Information & communication | 2026 |
| Ruby Systems LP | | 2014 |
| Rucchi Ltd | Wholesale & retail | 2025 |
| Ruchi Foods Ltd | Hospitality | 2016 |
| Ruchlaw Estates Four Limited | Real estate | 2019 |
| Ruchlaw Estates Limited | Real estate | 1963 |
| Ruchlaw Estates One Limited | Real estate | 2019 |
| Ruchlaw Estates Three Limited | Real estate | 2019 |
| Ruchlaw Estates Two Limited | Real estate | 2019 |
| Rudaco Solutions LP | | 2012 |
| Rude BOY Brands Ltd | Wholesale & retail | 2020 |
| Rudens Trade LP | | 2016 |
| Rudi Clifford Ltd | Wholesale & retail | 2021 |
| Rudloe Solutions LP | | 2016 |
| Rudog Art Ltd | Arts & recreation | 2025 |
| Ruff NUB Ltd | Wholesale & retail | 2025 |
| Ruffled Goose Limited | Hospitality | 2024 |
| Rufford Investments LP | | 2013 |
| Rufford Solutions LP | | 2012 |
| Rugbytots Edinburgh Limited | Education | 2022 |
| Rugbytots Scotland Limited | Arts & recreation | 2013 |
| Ruhlman Speight | | 1991 |
| Ruiseart SWH Limited | Wholesale & retail | 2024 |
| Rukhsanashaheen Trading Limited | Wholesale & retail | 2025 |
| Rule 1 Limited | Professional & scientific | 2019 |
| Rule Four Capital Limited | Financial services | 2026 |
| Ruler Investments LP | | 2016 |
| Rulium Ltd | Wholesale & retail | 2023 |
| Rumi Optics Ltd | Wholesale & retail | 2024 |
| Rumney Telecom Limited | Information & communication | 2018 |
| Rumpelstiltskin Management Ltd | Extraterritorial | 2011 |
| Rumport Gate LP | | 2016 |
| Rums Group Holdings LP | | 2026 |
| Rumtwo SP | | 2000 |
| Run Edinburgh Ltd | Administrative & support | 2014 |
| Run for Heroes Ltd | Information & communication | 2020 |
| Run Ocean Ltd | Wholesale & retail | 2025 |
| Run Taxi Ltd | Extraterritorial | 2022 |
| Runable Scotland Ltd | Arts & recreation | 2021 |
| Runcity Trade LP | | 2014 |
| Runfer Development LP | | 2015 |
| Runika Ltd. | Professional & scientific | 2013 |
| Runner Runner 1 Ltd | Other services | 2016 |
| Runnerrunner Limited | Other services | 2020 |
| Runo Holdings Ltd | Financial services | 2025 |
| Runstatz Limited | Professional & scientific | 2017 |
| Rupture Ltd | Arts & recreation | 2025 |
| Rurtech Trading LP | | 2016 |
| RUS Software LP | | 2016 |
| RUS Steel LP | | 2016 |
| Rusavo Limited | Wholesale & retail | 2026 |
| Ruscot Project Management Ltd | Construction | 2013 |
| Rushyglen Limited | Construction | 2005 |
| Rusmetals LP | | 2010 |
| Ruspirit LP | | 2015 |
| Russalco LP | | 2017 |
| Russel + Aitken Edinburgh LLP | | 2020 |
| Russell Bruce Ltd | Construction | 2014 |
| Russell Concrete Products Limited | Extraterritorial | 1968 |
| Russell Developments Limited | Professional & scientific | 1953 |
| Russell Gardening & Landscaping Ltd | Administrative & support | 2021 |
| Russell of Edinburgh Limited | Wholesale & retail | 1993 |
| Russell Road Limited | Real estate | 2026 |
| Russell UP Ltd | Hospitality | 2014 |
| Rustechtrade LP | | 2016 |
| Rusticus Ltd | Administrative & support | 2023 |
| Rustom Grosvenor Holdings Ltd | Real estate | 2023 |
| Rustom Holdings Limited | Real estate | 2022 |
| Rustom Restaurant Ltd | Hospitality | 2014 |
| Rustrans Europa LP | | 2012 |
| Ruta Divine Logistics Ltd. | Transport & logistics | 2025 |
| Ruth Macgilp Ltd | Professional & scientific | 2026 |
| Ruth Mcquiggan Photography Ltd | Professional & scientific | 2025 |
| Rutherford (Colinton) Limited | Real estate | 2017 |
| Rutherford (Davidsons Mains) Limited | Real estate | 2021 |