| Rocksley Tax Consultancy Limited | Professional & scientific | 2026 |
| Rockstar Developments Ltd | Households | 2022 |
| Rocstar Ltd | Professional & scientific | 2022 |
| ROD a Dare Company Limited | Professional & scientific | 2025 |
| ROD Taylor Flooring Limited | Construction | 2026 |
| ROD Welding Limited | Mining & quarrying | 1999 |
| Rodako Ltd | Information & communication | 2018 |
| Roemex Holdings Limited | Manufacturing | 2025 |
| Roemex Limited | Manufacturing | 1984 |
| Rogo Electrical Limited | Construction | 2023 |
| Rogue Engineering Ltd | Manufacturing | 2020 |
| Rogue Party Co Ltd | Manufacturing | 2025 |
| Rohallion Band Ltd | Arts & recreation | 2024 |
| Rohm Digital Ltd | Information & communication | 2025 |
| Rojava Limited | Other services | 2018 |
| Rojs Media UK Ltd | Information & communication | 2025 |
| Rolawn (Turf Growers) Limited | Agriculture & fishing | 1975 |
| Rolim Limited | Arts & recreation | 1981 |
| Rollerball Electricity Ltd | Energy | 2022 |
| Rollstud Holdings Limited | Professional & scientific | 2000 |
| Rollstud Limited | Manufacturing | 1990 |
| Romac Project Engineering Ltd | Information & communication | 2018 |
| Romamom Limited | Hospitality | 2017 |
| Romanillos Ltd. | Real estate | 2024 |
| Romar International Ltd. | Mining & quarrying | 2000 |
| Romar Topco Limited | Professional & scientific | 2014 |
| Rombat Consulting Limited | Professional & scientific | 2019 |
| Romia Apeals Ltd | Wholesale & retail | 2024 |
| Romont Impex LP | | 2014 |
| Romsco Investments Limited | Financial services | 2020 |
| Romtech Solutions Ltd | Construction | 2020 |
| Romy Skin Ltd | Wholesale & retail | 2026 |
| Ronald a Morrison Slaters Ltd. | Construction | 2003 |
| Ronald Brandie Ltd | Professional & scientific | 2024 |
| Ronaldsay Limited | Professional & scientific | 2006 |
| Rong Kang Limited | Health & social care | 2010 |
| Ronnie Berry Joinery Limited | Construction | 2009 |
| Ronnie Krupa Ltd | Education | 2023 |
| Roo's Leap Limited | Hospitality | 2005 |
| Roof and Walls Ltd | Construction | 2024 |
| Rook Tuning Limited | Professional & scientific | 2024 |
| Roops Enterprises Limited | Wholesale & retail | 2011 |
| Root & Shroom Ltd | Wholesale & retail | 2025 |
| Root Wash Global Ltd | Administrative & support | 2023 |
| ROOT-5 Ltd. | Information & communication | 2003 |
| ROOT-5 Solutions Limited | Information & communication | 2006 |
| Root:Ed Outdoor Learning CIC | Education | 2026 |
| Roots Plant Based Catering Ltd | Hospitality | 2019 |
| Ropex Ltd | Manufacturing | 2025 |
| Rora Renewable Energy Limited | Energy | 2011 |
| Rosemary’S Cuisine Limited | Hospitality | 2024 |
| Rosemma Limited | Administrative & support | 2013 |
| Rosemount Consulting Ltd | Professional & scientific | 2024 |
| Rosemount Cost Consultancy Limited | Professional & scientific | 2024 |
| Rosemount Drilling Limited | Professional & scientific | 2016 |
| Rosemount Palace Ltd | Hospitality | 2011 |
| Rosemount Petroleum Services Ltd | Professional & scientific | 2017 |
| Rosemount Properties Limited | Real estate | 1989 |
| Rosemount Property Management Limited | Real estate | 1992 |
| Rosenxt UK Ltd | Professional & scientific | 2024 |
| Rosetti Marino UK Limited | Mining & quarrying | 2013 |
| Rosewell Energy Limited | Administrative & support | 2005 |
| Rosh Medics Ltd | Health & social care | 2020 |
| Rosh ZAL Limited | Real estate | 1993 |
| Roshem Ltd | Wholesale & retail | 2012 |
| Rosie Boyz Property Ltd | Real estate | 2024 |
| Rosie Risk Management Ltd | Professional & scientific | 2024 |
| Rosjen Engineering and Management Ltd. | Professional & scientific | 2025 |
| Roslin Stores Ltd | Wholesale & retail | 2018 |
| Ross Contracts Consulting Ltd. | Administrative & support | 2010 |
| Ross Exchangers Limited | Professional & scientific | 2018 |
| Ross Marine Limited | Agriculture & fishing | 2022 |
| Ross of Chapel Street Bakery Ltd | Wholesale & retail | 2025 |
| Ross Offshore Consultancy Limited | Professional & scientific | 2014 |
| Ross Offshore Limited | Professional & scientific | 2018 |
| Ross Quality Improvement Ltd | Health & social care | 2019 |
| Ross Specialist Services Limited | Professional & scientific | 2022 |
| Ross Well Engineering Limited | Professional & scientific | 2004 |
| Rossal Energy Limited | Energy | 2018 |
| Rosslyn Audio Limited | Mining & quarrying | 2013 |
| Rosslyn North Limited | Construction | 2015 |
| Rossnow Fishing Ltd | Agriculture & fishing | 2016 |
| Rossnow Leisure (Aberdeen) Limited | Real estate | 1975 |
| Rosspana Limited | Other services | 2018 |
| Rossywendy Limited | Construction | 2024 |
| Rosttro Limited | Professional & scientific | 2024 |
| Rosy Park Limited | Construction | 2021 |
| Rotech Digital Limited | Information & communication | 2017 |
| Rotech Group Limited | Professional & scientific | 2010 |
| Rotech Holdings Limited | Professional & scientific | 1994 |
| Rotech International Limited | Administrative & support | 2015 |
| Rotech IP Services Limited | Professional & scientific | 2025 |
| Rotech Limited | Administrative & support | 2007 |
| Rotech Subsea Limited | Mining & quarrying | 2013 |
| Rotek Aircraft Maintenance Ltd | Manufacturing | 2017 |
| Rotergenius Life Centre Ltd | Other services | 2023 |
| Rothesay Enterprises Limited | Hospitality | 2012 |
| Rothesay Residence Limited | Hospitality | 2008 |
| Rothie Wind Ltd | Energy | 2022 |
| Rothienorman Flexpower Ltd | Energy | 2021 |