| Roman Transport Ltd | Transport & logistics | 2025 |
| Romanian C&C Ltd | Transport & logistics | 2015 |
| Romanian Discount Store Ltd | Wholesale & retail | 2024 |
| Romanian Store Ltd | Wholesale & retail | 2026 |
| Romano's Caterers Limited | Hospitality | 2010 |
| Romano's Coffee Limited | Hospitality | 2010 |
| Romans Home Improvements Ltd | Construction | 2024 |
| Romans Trading Ltd | Wholesale & retail | 2025 |
| Romario Limited | Construction | 2025 |
| Romax Technology Ltd. | Professional & scientific | 1989 |
| Romax Trading Limited | Wholesale & retail | 2016 |
| Romazna Ltd | Real estate | 2024 |
| Romega Distribution Ltd | Wholesale & retail | 2023 |
| Romega Foods Ltd | Wholesale & retail | 2025 |
| Romella Ltd | Other services | 2025 |
| Romenbell Properties Limited | Professional & scientific | 1999 |
| Romeo SIX Limited | Professional & scientific | 2017 |
| Rominity Care Ltd | Health & social care | 2021 |
| Rominvest Limited | Real estate | 2025 |
| Romserve Limited | Extraterritorial | 2001 |
| Romute Rejuvination Retreat Limited | Other services | 2025 |
| RON Records Limited | Arts & recreation | 2025 |
| RON Safety and Environmental Solutions Ltd | Professional & scientific | 2024 |
| Rona Pictures Limited | Information & communication | 2020 |
| Ronac Property Limited | Real estate | 2024 |
| Ronald W. Morris (Stourport) Limited | Administrative & support | 1949 |
| Ronell Cleaning Services Ltd | Administrative & support | 2026 |
| Rongjiang Ltd | Hospitality | 2025 |
| Roni Cars Ltd | Wholesale & retail | 2026 |
| Roni Investment Ltd | Real estate | 2023 |
| Ronin Mechanical Limited | Professional & scientific | 2022 |
| Roninbar Ltd | Hospitality | 2025 |
| Ronson Fabrications Limited | Manufacturing | 2018 |
| ROO and Little BOO Limited | Wholesale & retail | 2022 |
| Rood Group Holdings Limited | Extraterritorial | 2003 |
| Roodsafe Limited | Manufacturing | 2000 |
| Roodsafe Structural Services Ltd | Construction | 2020 |
| Roof Care Nottingham Ltd | Administrative & support | 2012 |
| Roofbunk International Ltd | Wholesale & retail | 2020 |
| Roofcare (Midlands) Ltd | Construction | 2017 |
| Roofing Register Ltd | Professional & scientific | 2023 |
| Roofing-Tec Ltd | Construction | 2021 |
| Roofros Limited | Construction | 2025 |
| Roofstudy Limited | Professional & scientific | 2024 |
| Roofus Property Ltd | Real estate | 2023 |
| Rookery Farm Management Ltd | Professional & scientific | 2001 |
| Room 17 Studio Ltd | Information & communication | 2017 |
| Room at the Top Design Limited | Other services | 2003 |
| Roost Developers Ltd | Construction | 2023 |
| Roost Properties Ltd | Real estate | 2020 |
| Rooster Aspley Ltd | Hospitality | 2024 |
| Rooster Courier Services Ltd | Transport & logistics | 2025 |
| Rooster House Interior Ltd | Construction | 2018 |
| Roosterlets Homes Limited | Real estate | 2015 |
| Roosters Chicken (Nottingham) Ltd | Hospitality | 2022 |
| Roosters Chicken (Original) Ltd | Hospitality | 2021 |
| Roosters Chicken Aspley Ltd | Hospitality | 2025 |
| Root Media Consultancy Limited | Professional & scientific | 2004 |
| ROOT2WIN CIC | Arts & recreation | 2025 |
| Rooted Software Ltd | Information & communication | 2023 |
| Rootiful Limited | Manufacturing | 2022 |
| Roots & Strnds Ltd | Other services | 2026 |
| Roots Academy Education Ltd | Education | 2022 |
| Roots N Routes Ltd | Wholesale & retail | 2026 |
| Roots Organics Shop Limited | Hospitality | 2018 |
| Roots Property Solutions Limited | Real estate | 2019 |
| Roots to Rise Skills Hub CIC | Education | 2026 |
| Roovi Short Stays Limited | Real estate | 2024 |
| Ropewalk Court Management (Nottingham) Limited | Households | 2001 |
| Ropewalk Holdings Ltd | Professional & scientific | 2021 |
| Ropewalk House Limited | Households | 2004 |
| Ropewalk Residential Limited | Real estate | 2021 |
| Rorla Designs Limited | Manufacturing | 2018 |
| Rosa Garden Services Limited | Administrative & support | 2015 |
| Rosaocha Services Ltd | Administrative & support | 2022 |
| Rosdefense Limited | Information & communication | 2025 |
| Rose & MAY Ltd | Wholesale & retail | 2015 |
| Rose Cars Ltd | Wholesale & retail | 2021 |
| Rose Dental Agency Ltd | Administrative & support | 2026 |
| Rose Family Property Limited | Real estate | 2024 |
| Rose Heathcare Ltd | Health & social care | 2026 |
| Rose House Properties Ltd | Real estate | 2018 |
| Rose Kothari Holdings Ltd | Financial services | 2026 |
| Rose Platinum Properties Ltd | Administrative & support | 2023 |
| Rose Platinum Property Management Ltd | Real estate | 2024 |
| Rose Press Ltd | Manufacturing | 2018 |
| Rose Travels Ltd | Transport & logistics | 2023 |
| Rose Tuition Ltd | Education | 2024 |
| Rose Villa Vintage Ltd. | Wholesale & retail | 2013 |
| Rose's Sparkle Clean Ltd | Administrative & support | 2025 |
| Rose-Dean Homes Ltd | Households | 2021 |
| Rosebank Services Limited | Real estate | 2016 |
| Rosebrick Developments Limited | Construction | 2014 |
| Rosebrook (UK) Limited | Real estate | 1993 |
| Rosedale Mews Management Company Limited | Real estate | 2014 |
| Rosedale Park Ltd | Professional & scientific | 1965 |
| Rosegrove Limited | Households | 1988 |
| Roseileen Healthcare Ltd | Public administration | 2019 |
| Rosekel Assessment Services Limited | Health & social care | 2014 |
| Rosekel Care Limited | Health & social care | 2022 |