| RT Fire and Security Limited | Construction | 2023 |
| RT Logistic Solutions Ltd | Information & communication | 2024 |
| Rtas Holdings Ltd | Real estate | 2024 |
| RTF Driver Academy Ltd | Transport & logistics | 2025 |
| RTL Consulting Ltd | Professional & scientific | 2024 |
| Rtmiss Limited | Manufacturing | 2023 |
| Rtol Limited | Hospitality | 2024 |
| RTS Engineering & Construction Limited | Construction | 2025 |
| RTS Rentals Limited | Transport & logistics | 2020 |
| RTS1 Properties Ltd | Real estate | 2025 |
| RUA Analytics Limited | Professional & scientific | 2024 |
| RUA Apparel Ltd | Wholesale & retail | 2025 |
| RUA Norte Clothing Ltd | Wholesale & retail | 2024 |
| Rubbish Shakespeare Company Limited | Education | 2010 |
| Rubina'Z Ltd | Wholesale & retail | 2024 |
| Ruby and Rafe Limited | Wholesale & retail | 2021 |
| Ruby Electrical Salford Ltd | Wholesale & retail | 2025 |
| Ruby Fizz Ltd | Wholesale & retail | 2016 |
| Ruby Kang Property Group Ltd. | Households | 2019 |
| Ruby Rose Boutique Ltd | Wholesale & retail | 2015 |
| Rudeboy Media Ltd | Information & communication | 2020 |
| Rudorwaishe Ltd | Wholesale & retail | 2020 |
| Rudraxx Ltd | Wholesale & retail | 2026 |
| Rugs Inn Limited | Wholesale & retail | 2026 |
| Rukh Limited | Health & social care | 2023 |
| Rukiya Homes Ltd | Real estate | 2024 |
| Rumaanah Ltd | Health & social care | 2023 |
| Rumco. Ltd | Wholesale & retail | 2023 |
| Rumi Technologies Ltd | Wholesale & retail | 2025 |
| Rumi Tutoring Services Limited | Education | 2025 |
| Rumis-It Ltd | Real estate | 2020 |
| Rumis-Uk Ltd | Wholesale & retail | 2018 |
| Rumworth Investments Limited | Real estate | 2025 |
| Run Robin Limited | Professional & scientific | 2018 |
| Rupa Group Ltd | Wholesale & retail | 2025 |
| Rupa Property Development Ltd | Real estate | 2022 |
| Rupertstreet Ltd | Health & social care | 2024 |
| Rushcliffe (Heysham) Limited | Real estate | 2010 |
| Rushcliffe (Poulton) Limited | Real estate | 2010 |
| Rushcliffe (ST Annes PCC) Limited | Real estate | 2005 |
| Rushcliffe Healthcare Holdings Limited | Real estate | 2007 |
| Rushcliffe Holdings Limited | Real estate | 2010 |
| Rushcliffe M S Limited | Real estate | 2010 |
| Rushent Transport Limited | Transport & logistics | 2020 |
| Rushton Developments & Lettings Limited | Real estate | 2024 |
| Rushton Lane Mini Market Limited | Wholesale & retail | 2019 |
| Russell & Russell Solicitors LLP | | 2018 |
| Russell & Russell Trust Corporation Ltd | Professional & scientific | 2025 |
| Russellers Investments Limited | Financial services | 2025 |
| Rust Demons Ltd | Professional & scientific | 2025 |
| Rutherhall Properties Limited | Real estate | 2001 |
| Rutronik Electronics UK Ltd | Wholesale & retail | 2014 |
| Rutronik UK Limited | Wholesale & retail | 2005 |
| Rutterkey Solutions Ltd | Information & communication | 2019 |
| RUU Choice Ltd | Information & communication | 2026 |
| Ruvi's Creative Ltd | Wholesale & retail | 2025 |
| Ruwo's Beauty Ltd | Wholesale & retail | 2022 |
| RV & Joseph Accountants Ltd | Administrative & support | 2017 |
| RV Events Ltd | Arts & recreation | 2018 |
| RV Medical Services Ltd | Real estate | 2022 |
| Rviz Ltd. | Information & communication | 2016 |
| Rvlm Estates Ltd | Real estate | 2025 |
| Rvquilts Limited | Wholesale & retail | 2024 |
| RVS Cleaning Services Ltd | Transport & logistics | 2025 |
| RW Electrical Solutions Ltd | Construction | 2025 |
| RW Recovery Holdings Limited | Water & waste | 2019 |
| RW Sash Windows Limited | Construction | 2025 |
| RW Smith Software Ltd | Information & communication | 2017 |
| RWA Catering Limited | Hospitality | 2016 |
| RWA Consultancy Ltd | Professional & scientific | 2023 |
| RWC Associates Limited | Professional & scientific | 2014 |
| RWP Investment Ltd | Real estate | 2025 |
| RX Designs Ltd | Information & communication | 2008 |
| RX Legal Consultancy Limited | Professional & scientific | 2026 |
| Ryall Group Holdings Limited | Financial services | 2024 |
| Ryall Property Law Consulting Limited | Professional & scientific | 2023 |
| Ryan David Thomas Limited | Extraterritorial | 2022 |
| Ryan Surgical Care Limited | Health & social care | 2025 |
| Ryancare Fostering Limited | Health & social care | 2002 |
| Ryancare Fostering South East Limited | Health & social care | 2020 |
| Rybbbb Ltd | Construction | 2022 |
| Rycool Limited | Energy | 2021 |
| Rydal Systems Limited | Administrative & support | 2021 |
| Ryder Pipeline Limited | Construction | 2021 |
| Rydeway Solutions Limited | Information & communication | 1996 |
| Ryle Systems Ltd | Professional & scientific | 2023 |
| Rymi Holdings Limited | Financial services | 2025 |
| Ryne Consulting Ltd | Professional & scientific | 2018 |
| Ryse Trading Ltd | Wholesale & retail | 2026 |
| Ryza Investment Ltd | Real estate | 2024 |
| Ryza Trade Ltd | Wholesale & retail | 2017 |
| RZ Traders Ltd | Wholesale & retail | 2018 |
| Rzee Builders Ltd | Construction | 2024 |
| Róandi Hair & Beauty Ltd | Other services | 2022 |
| S & a Distribution Ltd | Wholesale & retail | 2026 |
| S & a Manchester Limited | Real estate | 2016 |
| S & D Driver Recruitment Limited | Administrative & support | 2019 |
| S & D Ross Limited | Professional & scientific | 1993 |
| S & D Trade Permanent Placements Limited | Professional & scientific | 2025 |
| S & D Trade Recruitment Limited | Administrative & support | 2016 |