| Roobix Enterprises Ltd | Real estate | 2022 |
| Roof Rescue Team Ltd | Construction | 2025 |
| Roof Safety Supplies Ltd | Construction | 2016 |
| Roofing & Building Services Ltd | Construction | 2024 |
| Roofing Supplies BD7 Ltd | Construction | 2019 |
| Roofline Design (UK) Limited | Construction | 2011 |
| Roofologists Ltd | Construction | 2025 |
| Rooftop Asset Management Limited | Real estate | 2020 |
| Rooftop Capital Limited | Real estate | 2019 |
| Rooftop Estates Limited | Real estate | 2020 |
| Rooftop Living (UK) Limited | Real estate | 2013 |
| Rooftop Living Limited | Real estate | 2009 |
| Rooftop One Limited | Real estate | 2020 |
| Rooftop Two Limited | Real estate | 2022 |
| Rooftops Properties Limited | Real estate | 2000 |
| Roofworks (Yorkshire) Ltd | Construction | 2003 |
| Rookhope Ltd | Real estate | 2018 |
| Rookson Homes Ltd | Real estate | 2026 |
| Rookway Food Systems Limited | Administrative & support | 2001 |
| Room 17 Ltd | Education | 2025 |
| Room 94 Boutique Limited | Wholesale & retail | 2019 |
| Room 97 EA Ltd | Other services | 2020 |
| Room 97 the Springs Ltd | Other services | 2019 |
| Room Ninety Seven Creative Hairdressing Limited | Other services | 2011 |
| Rooms by CHE Ltd | Real estate | 2016 |
| Rooms Lane Maintenance Management Company Limited | Households | 2005 |
| Roomty Limited | Real estate | 2024 |
| Roomvi Limited | Real estate | 2024 |
| Roomvia Ltd | Hospitality | 2023 |
| Roomzzz (Cardiff) Limited | Hospitality | 2021 |
| Roomzzz (Corn Exchange) Limited | Hospitality | 2014 |
| Roomzzz (Edinburgh) Limited | Hospitality | 2017 |
| Roomzzz (Liverpool) Limited | Hospitality | 2014 |
| Roomzzz (Stratford) Limited | Hospitality | 2018 |
| Roomzzz Aparthotel (Management) LLP | | 2013 |
| Roomzzz Aparthotels LLP | | 2011 |
| Roomzzz Holdings Limited | Financial services | 2019 |
| Roomzzz Limited | Hospitality | 2004 |
| Roomzzz Newcastle Ltd | Hospitality | 2010 |
| Roosevelt Support Limited | Health & social care | 2019 |
| Rooshaus Ltd | Hospitality | 2023 |
| Root & Branch Music LLP | | 2012 |
| Root Connect CIC | Education | 2026 |
| Rootana Limited | Wholesale & retail | 2021 |
| Rootech Ltd | Information & communication | 2015 |
| Rooted Cosmetics Limited | Manufacturing | 2024 |
| Rootframe Ltd | Information & communication | 2025 |
| Roots & KIN Ltd | Agriculture & fishing | 2025 |
| Roots & Rise Movement CIC | Education | 2025 |
| Roots & Wings Training & Consultancy Ltd | Health & social care | 2025 |
| Roots and Shoots Gardening Ltd | Administrative & support | 2025 |
| Roots Bar Limited | Hospitality | 2026 |
| Roots Community Gardening CIC | Administrative & support | 2010 |
| Roots Leisure Ltd | Hospitality | 2022 |
| Roots of Atma Ltd | Health & social care | 2025 |
| Roots of Jannah Limited | Health & social care | 2025 |
| Roots of Respect Ltd | Health & social care | 2025 |
| Roots Produce Ltd | Hospitality | 2020 |
| Roots Trading Ltd | Wholesale & retail | 2024 |
| Roov Ltd | Information & communication | 2026 |
| Ropa Healthcare Company Limited | Administrative & support | 2018 |
| Roper Improvement Ltd | Construction | 2023 |
| Roper Jones Land Ltd | Professional & scientific | 2026 |
| ROQ Developments Ltd | Construction | 2023 |
| Roqs Consultancy Limited | Professional & scientific | 2021 |
| ROR Group Limited | Real estate | 2016 |
| Rory Groves Videography Ltd | Information & communication | 2023 |
| Rory James Beauty Ltd | Other services | 2015 |
| Rory James Hair Ltd | Other services | 2015 |
| Rory Rigby Limited | Professional & scientific | 2015 |
| ROS Enterprises Ltd | Real estate | 2018 |
| Ros'K Limited | Hospitality | 2025 |
| Rosa Hernando Ltd | Health & social care | 2014 |
| Rosalind Anita Jane Smith Fund KCP 2 L.P. | | 2008 |
| Roscoetek Limited | Administrative & support | 2020 |
| Roscom Media Ltd | Arts & recreation | 2021 |
| Rose Amour Limited | Wholesale & retail | 2024 |
| Rose and Crown Property Holdings Ltd | Real estate | 2026 |
| Rose Clark Limited | Other services | 2020 |
| Rose Court (Headingley) Management Company Limited | Households | 2023 |
| Rose Entertainment Ltd | Arts & recreation | 2024 |
| Rose FOX Properties Ltd | Real estate | 2025 |
| Rose Garden Leeds Ltd | Health & social care | 2022 |
| Rose IR Limited | Financial services | 2017 |
| Rose Lettings Ltd | Real estate | 2024 |
| Rose Management Limited | Real estate | 2019 |
| Rose of Sharon (UK ) Ltd | Health & social care | 2016 |
| Rose Rhoades Limited | Wholesale & retail | 2019 |
| Rose Roofing (TST) Limited | Professional & scientific | 2024 |
| Roseberry Consulting Limited | Information & communication | 2003 |
| Rosebrook Holdings Ltd | Financial services | 2023 |
| Rosebud Rothwell Ltd | Hospitality | 2025 |
| Rosecare 24 Ltd | Health & social care | 2018 |
| Rosecare Community Services Ltd | Hospitality | 2022 |
| Rosedale Projects Limited | Administrative & support | 2021 |
| Roseglass Factory Limited | Manufacturing | 2025 |
| Rosegrove Investments Ltd | Real estate | 2015 |
| Rosejohnson Limited | Health & social care | 2016 |
| Rosemeade Management Company Limited | Households | 2019 |
| Rosemont House Management Company Limited | Real estate | 2023 |